This process does not require the three-step refinement needed to produce steel from ore. |
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The ore was stamped fine, roasted, and amalgamated in combination pans without grinding. |
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He employed thirty to forty men in the mid-1930s and extracted ore from underground workings that were accessed by shafts and declines. |
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Carl Staszak found a large boulder with a good exposure of the ore suite-cinnabar, native mercury, calomel, and some yellow mercury oxychlorides. |
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Two terms that are still commonly encountered when discussing the classification of ore deposits are syngenetic and epigenetic. |
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He went on to remind me that China consumes more steel, copper and iron ore than any other country in the world. |
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This may well have been the case but the company only worked the mine for a short time during which several thousand tons of ore were treated. |
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It used mules to haul two ore cars and a flatcar one and a half miles between its mill at the foot of the mountains and its mine. |
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The potash ore in the Sallent mine is a reddish mineral known as sylvinite, a form of potassium chloride. |
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Typically the Furness haematite is found in rounded masses, resembling animal kidneys, and so is known as kidney ore. |
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China has been restructuring its steel industry, increasingly replacing low-grade domestic iron ore with imported iron ore of better quality. |
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Waste was hauled by truck to various designated dumps, and the ore was to be stockpiled or to be directly crushed, screened, and agglomerated. |
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Another major development was an underground ore handling system for the drill, extraction and trucking levels associated with the stopes. |
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Once more Aclare was alive with the sounds from tunneling, stoping, dressing, sorting, bagging, and the loading of ore from the mine. |
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The current processing route for sylvinite involves milling of the ore in a saturated leach liquor followed by conventional flotation. |
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The biggest deposits of the metal ore in the world are to be found in the eastern Congo. |
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The only raw material that the plant will be using is the ore mined from the Skorpion orebody. |
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The mineraloid is usually found in the ore cinnabar, where it must go through a heating and condensing process to be obtained. |
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This is when the first texts for obtaining mercury from its ore cinnabar appear. |
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Gold miners often have to descend more than 3 kilometres underground to drill ore in sweltering narrow tunnels. |
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The main ore minerals are galena, chalcopyrite, sphalerite, and tetrahedrite that are associated with quartz and barite gangue. |
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The then board of Purity Manganese decided to suspend mining operations until ore had been sold, accordingly all subcontracts were terminated. |
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They also noted that much kaolin is in or near decomposed porphyry bodies that overlie the largest ore shoots in the Leadville Dolomite. |
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The high-grade ore carried 100-400 ounces of silver and 0.5-3 ounces of gold. |
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He specializes in the recovery of gemstones and mineral specimens and in the exploitation of high-grade ore deposits. |
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Last year, their fleet of 150 mostly chartered ships delivered 15 million tonnes of iron ore to the mainland. |
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The Mesabi Iron Range contains some 110 miles of small towns built at the turn of the last century along a seam of iron ore called taconite. |
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The remnant ore inside the old stopes, pillars and tailings used as backfilling are being leached with mild acid solution. |
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The local iron ore gives the teapot a porous molecular structure thus allowing the aeration of the tea inside. |
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Captain Lewis now planned to build a furnace for the purpose of assaying the ore. |
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The kind of ore that attracted iron was once called magnesian stone, because it was discovered in the part of Asia Minor near Magnesia. |
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At the nearby Lady Tennyson small amounts of copper ore averaging twenty-five to thirty percent were also raised. |
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By May 2004, more than 10,000 tons of high-grade ore had been mined from this adit. |
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One quick stop was made at the abandoned New First of May mine, where on the ore pile we found galena, pyrite, arsenopyrite, and fluorite. |
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Indeed, the large bulk shipping carriers are queued up for weeks waiting to load basic ore and other items on the way to China. |
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In an effort to convert copper rock into quick cash, he tried to open-pit mine the lode to extract ore as fast as possible. |
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Finding teamsters, to transport the hand picked ore to Port Adelaide for smelting at Swansea, proved a major problem. |
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Diamond drilling bits were used in prospecting, and thermal ore processing allowed winter panning in placer mines. |
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Who cared if they got radiation sickness, as long as the ore was being mined? |
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As it happened, Workington's adherence to acid steelmaking sealed the fate of the ore dock in the next few years. |
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Many ore carriers preferred to clear Maryport in ballast, loading at South Wales ports with coal for Spain. |
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The locations in the Earth's crust where these accumulations occur are collectively referred to as orebodies, ore reserves, or ore deposits. |
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The ore zone is a combination of veinlets, lenses, and nests of pyrite and quartz. |
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There was also an overhead ropeway with buckets carrying the ore from the shaft to the mill for crushing. |
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Donnellan and Everette drove the Sheridan tunnel 100 feet farther along the vein and found richer ore. |
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More and more of the true worshipers of the great ifrit are rallying around this tower and openly not worshiping the one-eyed ore god. |
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The principal ore of tin is the mineral cassiterite, SnO2, found abundantly on Phuket Island. |
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Lodes of ore and inches of fertile loam have little bearing on a nation's prosperity and influence anymore. |
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Some ore deposit types, such as volcanogenic massive sulphide deposits, can contain both syngenetic and epigenetic mineralization. |
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By 1952 an improved grade of ore was encountered, and the lode was mined until 1956, when ore reserves were exhausted. |
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Thin crusts of small rhodochrosite crystals on high-grade manganese ore were covered by masses of clear gypsum. |
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Australian ocean freighters disgorge tons of iron ore onto conveyor belts leading to a 105-meter-high blast furnace. |
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In the first, the ore is converted to magnesium chloride, which is then electrolyzed. |
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The primary ore mineral was pyrargyrite, and much of the ore ran 500-5,000 ounces of silver per ton. |
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The traditional method for extracting pure iron from its ore is to heat the ore in a blast furnace with limestone and coke. |
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With Finex, coal and ore are turned into iron without coking and sintering. |
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He may have seen this water driven tilt hammer used for crushing metal ore in Yorkshire. |
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The idea that he had was for the liquid ore to be gelatinized into a thicker formula and decrease the speed of the intake. |
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It still contains the largest reserves of rich nickel ore in New Caledonia. |
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The ore, which ran to 25 percent silver, was melted in a small clay or stone furnace called a guaira or wayra, using lead oxide as a flux. |
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Presently ilmenite is being won from titaniferous iron ore deposits in New York, Canada, Finland, and Norway. |
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The mining of titaniferous ore has affected the region socially, ecologically and economically. |
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For each tonne of cans that is re-used, 1.5 tonnes of iron ore and half a tonne of coal are saved. |
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One ton of ore contains 29, 167 troy ounces and so use of an assay ton makes the math easy. |
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Over the past several years, illegal miners have produced 40,000 metric tons of tin ore per year, near equaling Timah's production. |
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During testing at Northern Territory's Tanami Desert, the Kenworth hauled gold-bearing ore in 400 tonne, six-trailer road trains. |
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The major ore and gangue minerals are given in the table, but only those of interest to collectors are discussed in detail below. |
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This jig was the first of its kind in the world to be used for beneficiation of manganese ore and was praised mainly for its efficiency. |
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At first, miners separated high-grade ore from waste rock underground by hand. |
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Germany's chief natural resources are iron ore, bituminous coal and lignite, potash, timber, lignite, natural gas, salt, and nickel. |
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The primary ore minerals were not investigated, although galena and pyrite were found as relict masses on several occasions. |
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This was followed closely by new demand for air transport to serve exploration teams seeking to exploit the country's rich deposits of iron ore. |
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For example, you use lumber for buildings and ships, iron ore for cutlasses and muskets, and sugarcane for rum. |
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To extract the silver, the Greeks roasted the ore and then cupelled the molten metal. |
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Despite its rich ore deposits, the Groverake is not known as a major specimen-producing mine. |
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Upstream in the manufacturing of a steel can, iron ore is excavated in open pit mines. |
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The low-grade ore was segregated on the dump, awaiting the arrival of cheap rail transportation to the district. |
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Iron ore is Austria's most important mineral resource, and metal and metal products, especially iron and steel, lead the manufacturing sector. |
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Cupel tongs are adequate for moving bigger range of cupels used in ore analysis. |
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Unfortunately, the presence of minute ore particles had a real impact on our attempt to photograph the ships. |
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A miner in the tribute team could make a fair bit of money as they were paid by the amount of ore that they shifted. |
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But until the railroad came through Las Vegas and Moapa in 1905 the ore was freighted to Modena, Utah. |
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In the new stage, the ore will first be leached, and then, the residue will be treated by flotation to recover the sulphide content. |
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The country now has less than 18 billion tons of exploitable iron ore reserves with a tenor below 30 per cent. |
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For more than half a century, Minnesota's iron ranges supplied the iron ore that fed the nation's steel mills. |
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There aren't too many sites where we can have that and proximity to coal for the coking ovens and to iron ore and copper ore and tin. |
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They are found throughout the world and are the most important iron ore in the world today. |
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In 1840 iron ore had only recently been discovered and anthracite coal mining had not yet begun. |
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In between, the anchors watch stocks in these sectors and pronounce that coal has gone up, or iron ore is flattish. |
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Its most common ore is sylvanite, a complex combination of gold, silver, and tellurium. |
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Both siderite and massive pyrite were mapped as noncommercial iron ore by the Eagle mine staff. |
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The bright-yellow mineral tyuyamunite is one of the most common uranium ore minerals. |
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For production, the ore was smelted, then the resultant iron bloom was hammered, stretched, and annealed to remove impurities. |
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It is likely that they were searching for deposits of lead ore and struck upon an outcrop of Blue John by chance. |
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The pack mules carrying the gold ore scattered in all directions, spilling ore over a wide area. |
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The underground pursuit of iron ore here did not require timbering because the rock was so hard and dense. |
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In the second process, the ore is converted to magnesium oxide, which is then treated with the alloy ferrosilicon. |
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Geologists and others interested in ore textures also find the slabbed high-grade specimens interesting. |
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Energy-intensive blast furnaces, convert iron ore to pig iron, while coal is converted to coke. |
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One piece of ore that missed the smelter contained some secondary willemite with a very long phosphorescence. |
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A famous Saxon heirloom is nearby, the lump of brown iron ore studded with newly-discovered Colombian emeralds. |
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Wollaston found two new elements, rhodium and palladium, in an ore found originally in South America. |
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It was completed in 1930, with two coal dumpers and dock space, as well as an ore dock with three Hewlett unloaders. |
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Conditions of ilvaite formation and factors responsible for its concentration pattern in different ore bodies and deposits are discussed. |
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A reverberating furnace with two hearths heated a roaster to 1,200 degrees Fahrenheit to calcine the ore. |
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The furnace which was used to retort the ore was previously taken off location so little or no above ground structures were left. |
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The barite ore is massive and occurs within residuum derived from carbonate units. |
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To make smalt, cobalt ore is smelted, and the resulting cobalt oxide poured into molten glass. |
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At Swansea, the ore was smelted using huge quantities of cheap coal, producing a poisoned landscape. |
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The climate and topography of the region in which laterite formation occurs will control the grade of ore produced. |
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Nonetheless, the relative proportions of each mineral in the ore and airborne dust are not known. |
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The simplest ore minerals are the native metals in which the mineral is composed of a single element. |
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The ore body is brecciated and may represent the filling of a volcanic neck or pipe. |
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One of the coins in the set was a 2 ore coin with the face value of about 9 satang. |
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This time it was uranium and iron ore which provided the much needed employment opportunities. |
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Intrusive breccias can be the host for metallic ore deposits and aesthetic mineral specimens. |
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The ore is transported to sizers and breakers, where it is crushed, mixed with water and solvent, and fed into a hydrotransport pipeline. |
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This source of ore is quite iron poor, unlike the ores that were later to be quarried out from cliff faces. |
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Spongy iron from the reduction of spathic iron ore is heated to redness and steam passed over it. |
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Bricks have always been used for years by the construction industry, and for lining of ore smelting furnaces. |
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These deposits represent enrichments of ore minerals caused by surface waters that percolate downwards through an existing sulphide-rich orebody. |
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Some ore deposits occur in alkalic ultrabasic rocks derived from the Earth's mantle. |
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Later, in 1937, he also discovered and developed huge chrome deposits associated with the platinum ore at Wintersveld in the Bushveld. |
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But with ore prices up nearly 50 percent in value over the last 12 months, gold fever has swept the rainforest again. |
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Just ahead, he must pass between a yellow peak of sandstone, and a reddish one, perhaps containing iron ore like the stones used in the Krelling forge. |
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Much of the chalcopyrite known to be from the replacement ore bodies of the Argentine vein displays either a dark gray tarnish or a thin coating of another mineral. |
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He soon had enough copper ore dug up to start advertising for teamsters. |
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The ore shoot is mainly in the Molas Formation and is surrounded by a silicified envelope that contains galena, sphalerite, chalcopyrite, tetrahedrite, and pyrite. |
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There is an overconcentration of ownership in seaborne iron ore trade. |
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After the coarse calcite was replaced by fluorite, the titaniferous magnetite rims remain as partly martitized magnetite rims around the fluorite ore pods. |
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In China, for example, tungsten, tantalum, tin and gold are mined and ore is imported from other countries. |
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The conversion of coal to coke made cheaper iron ore smelting possible and simultaneously produced town gas, used from the early 19th cent. for lighting. |
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The active volcanic vents along the spreading mid-ocean ridges create ideal environments for the circulation of fluids rich in minerals and for ore deposition. |
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They also planned to construct an aerial tramway to bring ore to the mill. |
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Goldfields in Nevada that had been neglected because the ore was just too expensive to extract were now attractive properties. |
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More recently, archaeological discoveries have documented the Incas' extensive efforts to mine silver ore and extract the precious metal in smelting operations. |
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The simple explanation is that modern production techniques of smelting ore and manufacturing copper, brass, and iron for commercial use remove impurities. |
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More than thirty-four years after its discovery some sixty miners were employed raising the ore while above ground thousands of tons of old tailigs and ore were smelted. |
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I wouldn't want to live under any other arrangement, but it only can only create alloys are as good or bad as the raw ore that's fed into the smelter. |
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Masses of pale green botryoidal smithsonite in cavities to 5 cm have been found in ore stockpiled on the dump immediately east of the decline portal. |
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Zodiac, with about 120 ships, will provide a capesize bulk carrier, ranging in size from 150,000 dwt to 180,000 dwt to ship iron ore from Brazil to Shanghai. |
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Prior to this arrangement the Smuggler had used as many as six hundred burros to haul high-grade ore over the range to be shipped via the Silverton Railroad to the smelter. |
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In the case of certain ores containing relatively inactive metals such as mercury, separation can be achieved by heating the ore in air, i.e., by oxidative calcination. |
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Work was immediately started, and the 300 additional stamps were dropping in May, 1890, thus making a total of 540 stamps crushing ore from the Treadwell mine. |
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Underground, many artefacts can be seen, including stemples supporting stacked deads, ladders, pump rods and pipes, pulleys, ore tubs, windlasses, guide chutes and timbers. |
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The most common ore of the element is pitchblende, although it is also present in other minerals, such as uraninite, carnotite, uranophane, and coffinite. |
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This also affected the cartage of copper ore from the northern mines. |
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The new owners gave an extended lease of life to the mine by extracting ore from the footwall zone of the old stopes that were thought to have been mined out. |
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Many mines have zones of high-grade ore that are very profitable to mine. |
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Amongst the thirty recognised Bronze Age mine sites in the British Isles, fahlerz minerals are present in ore quantities only at Ross Island, Killarney, Ireland. |
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A flux is sometimes used that combines chemically with the infusible materials in the ore to form slag, which floats on top of the metal and can be drawn off. |
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The oxidized and broken ore contained a high percentage of clay minerals that made it very sticky and hard to handle, but the concrete mixer worked like a dream. |
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Bauxite, the main ore of aluminium, also consists of small nodules, called pisoliths, and is generally thought to require an extremely wet climate to form. |
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Early-stage hydrothermal leaching of the limestone created solution cavities and brecciated zones along the fissures and faults, providing sites for subsequent ore deposition. |
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Unlike its rival, Maryport had to forward the ore by rail to most of the users, an expensive procedure which did not sit well with the ironmasters. |
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The object of incessant carping from the Workington ironmasters, it was not spared the grumbling of the shipping companies that carried ore into the Senhouse Dock. |
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The engine was a once a proud sight on the West Coast main line, but in its final days, it hauled iron ore from Birkenhead to Shotton steelworks in north Wales. |
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The ore is associated with plagiogranite porphyry of Mesozoic age. |
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It was considered such ideal fluxing ore that the El Paso smelter paid the costs for shipping it by rail and processed the ore at no charge to assure a steady supply. |
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According to our shopper, the assayer would make up a tray of aged bone-ash, magnesium or cement cupels into which crushed ore along with a button of lead was added. |
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It is associated with all ore minerals as well as most gangue minerals. |
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Based on the very high average grade of current ore and life-of-mine ore reserves, the Red Lake mine is, to our knowledge, the richest gold mine in the world. |
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The only important ore of cadmium is greenockite, or cadmium sulfide. |
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Thus, the ore minerals form after the host rock and are called epigenetic. |
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They were hitting on all cylinders as they mined the acrid ore of Mamet's singular cynicism. |
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The Curies resolved to learn as much as they could about the source of radioactivity in pitchblende, the ore with which Becquerel originally worked. |
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They pointed out that while most minerals had fully ad valorem rates of royalty at present, iron ore, limestone and dolomite had tonnage-based royalty. |
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It produced a large number of fine specimens of grape ore and kidney ore. |
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Where the limestone has been cut by Late Tertiary veins, it has been recrystallized and slightly mineralized but contains no commercial ore deposits. |
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The process of uranium enrichment is incredibly difficult and energy intensive. Thousands of tons of uranium ore should be processed into powder form called yellowcake. |
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The silica, alumina, and iron come from sand, clay, and iron ore. |
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The pad is used to store a mound of ore through which chemicals percolate to leach out the gold ore, which is then collected and processed into bullion. |
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More of those rail carts rolled steadily up to their tops, dumping crushed ore and what looked like already-burned coal into the hoppers which fed them. |
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Austria produces some petroleum and natural gas to meet its own needs, and it also mines coal, iron ore, copper, lead, zinc, antimony, and graphite, used in industry. |
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It was an expensive area to mine, but the rich ore made it worthwhile. |
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The republic has supplies of coal and lignite and uranium ore. |
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Picture richly wooded hill country possessing beds of limonite with New England's richest iron ore and plentiful streams with abundant mill seats. |
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High-grade ore is still refined in roasters and mills, but the low-grade stuff goes into leach heaps, huge hills of pulverized ore mounded atop plastic liners. |
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Iron ore brought a measure of prosperity, and was available throughout the country, including bog iron. |
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A haul road is usually situated at the side of the pit, forming a ramp up which trucks can drive, carrying ore and waste rock. |
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Leftover waste from proccessing the ore is called tailings, and is generally in the form of a slurrey. |
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A bell pit is a primitive method of mining coal, iron ore or other minerals where the coal or ore lies near the surface. |
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The line was built to carry iron ore from the Whitehaven area to Lanarkshire and was financed and operated by the Caledonian Railway of Scotland. |
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The use of adits for the extraction of ore is generally called drift mining. |
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Western Labrador is also home to the Iron Ore Company of Canada, which operates a large iron ore mine in Labrador City. |
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Horizontal travel by means of narrow gauge tramway or cable car is also much safer and can move more people and ore than vertical elevators. |
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The headframe will also contain bins for storing ore being transferred to the processing facility. |
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The second compartment is used for one or more skips, used to hoist ore to the surface. |
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Resteel would obtain iron ore pellet from its processing facility in Tojo Una-Una, Central Sulawesi. |
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Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. |
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Mining has been focused on iron ore for centuries but other ores has been mined as well. |
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To increase the oxygen contents of the heat, iron ore can be added to the heat. |
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The present community of Labrador West is entirely a result of the iron ore mining activities in the region. |
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The CKP was built to enable ore and coal to be brought together at steel foundries in both counties. |
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Millom owes it existence to the discovery of iron ore and the opening of mines and iron works in the 19th century. |
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At the peak of production, some half a million tons of iron ore were transported from here for smelting. |
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Soon after the abbey's foundation the monks discovered iron ore deposits, later to provide the basis for the Furness economy. |
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Small quantities of iron and ore were exported from jetties on the channel separating the village from Walney Island. |
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The increasing quantities of iron ore mined in Furness were then brought into the centre of Barrow to be transported by sea. |
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Its success was a result of the availability of local iron ore and coal from the Cumberland mines and easy rail and sea transport. |
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The railway brought mined ore to the town, where the steelworks produced large quantities of steel. |
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Due to declining uranium prices at the time, the shaft was never opened to the ore and is now plugged at the surface. |
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A nearby mine at Hawk Rigg possibly dates from the Elizabethan era and it was reported in 1709 that iron ore was mined in the area. |
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It was reported that in 1856, the quantity of iron ore raised in the neighbourhood of Whitehaven was 259,167 tons. |
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It was forced to close in April 1913, due to decline in demand for iron ore and small volumes of passengers in summer. |
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Small rail vehicles offer effective transportation of ore and waste rock, as well as workers, through narrow tunnels. |
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Two unsuccessful attempts to find lead ore in economic quantities on Helvellyn have been made. |
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The Carron Company established its ironworks at Falkirk in 1759, initially using imported ore but later using locally sourced Ironstone. |
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Iron had been mined in Furness since prehistory, and by the late 18th century ore was being exported from Barrow. |
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Mining in Furness reached its peak in 1882, when 1,408,693 tons of ore were won. |
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Before chemical dyes became available, this dye was made from either iron ore or graphite mixed with grease. |
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Baryte used for drilling petroleum wells can be black, blue, brown or gray depending on the ore body. |
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The extraction of iron from its ore into a workable metal is much more difficult than for copper or tin. |
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Mining of lead ore has been known in the area of the headwaters of the Wear since the Roman occupation and continued into the nineteenth century. |
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At around this time people began to extract iron from the ore in peat bogs. |
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At scales between entire mountain ranges and ore bodies, Bouguer anomalies may indicate rock types. |
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Extractive metallurgy is the practice of removing valuable metals from an ore and refining the extracted raw metals into a purer form. |
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After collection the tin ore had to be crushed, concentrated and then smelted. |
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The coarse gravel or crushed ore was introduced into a hole in the centre of the top stone and was rendered to a fine sand. |
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At first this process operated on the dry ore, which was shovelled in and removed by hand. |
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The need for this process, which was known as dressing the ore, increased as the poorer sources of lode tin were exploited. |
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In order to convert a metal oxide or sulphide to a purer metal, the ore must be reduced physically, chemically, or electrolytically. |
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The crushed ore, suspended in water was introduced onto a central cone and spread outwards over a slightly inclined conical surface. |
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The fairest diamonds are rough till they are polished, and the purest gold must be run and washed, and sifted in the ore. |
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Smith had merely dug a shaft, salted the mine with a good grade ore, in order to lure Jeremiah into purchasing. |
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He then discovered that Lovell had salted the mine with ore from the Little Pittsburgh. |
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Manganese dioxide ore is used as depolariser in the manufacture of dry batteries. |
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Iron ore producers are facing the first price fall for annual contracts in seven years as demand weakens for steelmaking inputs. |
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Mining may not be necessary if the ore body and physical environment are conducive to leaching. |
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Leaching dissolves minerals in an ore body and results in an enriched solution. |
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Mount Ginka iron ore target has major scale potential, on the basis of what it called hugely exciting aeromagnetic survey results. |
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It is a major buyer of Venezuelan oil and gas and brazilian iron ore. |
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The completion of the first phase of an internal winze has allowed deeper access to the high-grade ore to depths below 1,000 metres. |
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A Ministry of Labour investigation found that there had been a hang-up of wet muck in the ore pass. |
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They come from the same ore sources, both are heavily chalcophile, and can form the same soluble complex. |
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The majority of the Omitiomire resource contains sulphide ore consisting mainly of chalcocite. |
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Typical applications include dredging, cleaning of settling ponds, coal and ore slurries, quarries, mines and many other industries. |
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The slurry pipeline to carry iron ore from Bailadila to Vizag has been planned in two phases. |
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Once the mine has been dewatered, DTL will sample at depth to define the shape and extent of the ore body. |
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That ancient ore is now found on the Earth's surface, and is particularly common in the Canadian shield. |
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Tailings of a previous process may be used as a feed in another process to extract a secondary product from the original ore. |
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In 2012, there were scarcely new tantalum ore projects being put into production. |
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Meanwhile, the Dataigou mine has features of deep-buried depth, wide-spread ore body, steep obliquity and big scale of ore body. |
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Also, if the relief on the surface of the ore body is variable, the reflection amplitudes will be attenuated. |
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They were also used to produce a controlled supply to wash the crushed ore. |
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New drillings in the company's current mine locations recently revealed that the ore body present is much larger than expected. |
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The investment will be used for mineral development plans especially in iron ore and pelletizing projects. |
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Also, escalating steel industry which is driving iron ore production and logistics around is a major driver for seaborne dry bulk market. |
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Some parts ore marked after polishing and the act of repolishing diminishes them. |
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A reprive was given to producers of certain mineral ores including copper, iron ore, lead and zinc concentrates. |
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Surrounded by rich ore deposits, Azogues is a center for tanning and flour milling. |
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This met the requirements of the ceramics industry and extended the reserves of high potassium feldspar ore available to the Monticello facility. |
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Tacone notes that Dofasco recently purchased an iron mine while US Steel also owns its own iron ore mining facilities. |
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Alluvial gold deposits could be worked and the gold extracted without needing to crush the ore. |
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Alternatively, less expensive control systems ore available that employ simple control panels with tactile push buttons and controls. |
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Thirty tons of used ore is dumped as waste for producing one troy ounce of gold. |
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Gold ore dumps are the source of many heavy elements such as cadmium, lead, zinc, copper, arsenic, selenium and mercury. |
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On the night shift of June 8, 2011 Jason Chenier and Jordan Fram were working at an ore pass on the 3,000 foot level of Stobie Mine. |
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The following table summarizes the results for the 11 column tests that evaluated the leachable ore material. |
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Metallurgical test work indicates the primary ore to be free-milling with extraction of better than 90 percent. |
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The region is one of the leading producers of iron ore, copper, niobium, lithium and rhenium in the world. |
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ExBar 200, 325, 400 and 4-micron products are manufactured from a high quality natural barium sulfate ore. |
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Mineralization at Perkoa consists of a massive pyrite, sphalerite, pyrrhotite, baryte ore, with small amounts of lead and copper sulphides. |
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These gold ore dumps are long term, highly hazardous wastes second only to nuclear waste dumps. |
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Galena, a principal ore of lead, often bears silver, interest in which helped initiate widespread extraction and use of lead in ancient Rome. |
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As an indication of the miners' desperation in these years, the free miners of Wensley lowered themselves to caving for scraps of ore. |
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There is no constructive trust over the Jack Hills iron ore project or Murchison's shares in Crosslands. |
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The dozen as a measure for iron ore remained almost completely constant at 12 cwts. during the sixteenth and seventeenth centuries. |
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In the wake of its uranium exploration, Deep Yellow has discovered an iron ore body that may turn into a viable mining operation. |
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Merthyr was close to reserves of iron ore, coal, limestone, lumber and water, making it an ideal site for ironworks. |
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Stroganovs developed farming, hunting, saltworks, fishing, and ore mining on the Urals and established trade with Siberian tribes. |
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The Blaenavon Ironworks, now a museum, was a major centre of iron production using locally mined or quarried iron ore, coal and limestone. |
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Other elements of the Industrial Landscape are the mines and quarries from which coal, iron ore, fire clay and limestone were extracted. |
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The port's busiest year was 1956, when 1,155,076 tonnes of iron ore alone were exported. |
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The increasing quantities of iron ore mined in Furness were then brought to Barrow to be transported by sea. |
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Naturally occurring technetium is a spontaneous fission product in uranium ore or the product of neutron capture in molybdenum ores. |
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Therefore, the largest deposits of caesium are zone pegmatite ore bodies formed by this enrichment process. |
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Mining and refining pollucite ore is a selective process and is conducted on a smaller scale than for most other metals. |
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Alternatively, caesium metal may be obtained from the purified compounds derived from the ore. |
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The first step in discovering an ore body is to determine what minerals to test for. |
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After a prospective mineral is located, the mining engineer then determines the ore properties. |
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This may involve chemical analysis of the ore to determine the composition of the sample. |
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Once the mineral properties are identified, the next step is determining the quantity of the ore. |
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This involves determining the extent of the deposit as well as the purity of the ore. |
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Hydraulic mining is utilized in forms of water jets to wash away either overburden or the ore itself. |
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Explosives are used to break up a rock formation and aid in the collection of ore in a process called blasting. |
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Blasting occurs in many phases of the mining process, such as development of infrastructure as well as production of the ore. |
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The very most valuable of these have been the deposits of iron ore in northwestern Sweden. |
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Timber, hydropower and iron ore constitute the resource base of an economy with a heavy emphasis on foreign trade. |
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German submarines were used to lay mines and to attack iron ore shipping in the Baltic. |
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The presence of faults and joint structures in stope walls within the ore body has resulted in overbreak of ore into adjacent stopes. |
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It sank in a Pacific typhoon while carrying a cargo of iron ore from Canada to Japan. |
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These were operated by the flames playing on the ore and charcoal or coke mixture, reducing the oxide to metal. |
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Coal from the south was transported to the North Sea port, and imported iron ore was shipped via the canal towards Rhine and the Ruhr. |
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Vetria will extract, transport and sell iron ore from Macico do Urucum in Corumba through the Port of Santos. |
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The sulphidic ore consists of pyrrhotite and lesser amounts of pyrite, sphalerite, galenite, and chalcopyrite. |
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Contains fine pannable gold. The most common ore type, sometimes as large boulders. |
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Initial mining started in a previously developed oxide ore stope in the Ogee zone. |
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In Europe, a major source of tin was the British deposits of ore in Cornwall, which were traded as far as Phoenicia in the Eastern Mediterranean. |
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Afferro Mining declares a substantial rise in indicated saprolite and magnetite resources at its Nkout iron ore project in Cameroon. |
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