| Also thermit is used in the same way with a small amount of titanium oxide, to purify iron and steel. |
| Earlier in this chapter I said that the slag, or aluminum oxide, from the thermit process was an almost useless product. |
| Another eye-catching experiment in his armoury is the thermit reaction which allows metal to be joined together by generating exceptionally high temperatures. |
| The procedure is identical to that used for welding steel except that a special thermit mixture is required. |
| One of the things thermit is not extensively used for is the repairing of gray iron castings. |
| Dr. goldschmidt made use of this reaction in his thermit process. |
