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Show 43 scale war, the continuing westward movement of the population, sent and future increases in steel and blast furnace other factors, makes the Iron County Iron all large 49 The magnetite present in small amounts. chacopyrite is These ore zinc and copper The are more that economical The other in veins and is replace- which is found in ore bodies in the form of most of the in ore ore ore pyrite, barite are very varying amounts, is Manganese, arsenic, titanium, minute amounts. is soft and Cornrn on easily practice prior to its charge type of contain usually bodies as is to It crushed. mined, but preparation and beneficiation of the ore was re resulted in crush, screen into the blast furnace. found in the Iron Mountain District appears predominantly magnetite. limonite and minor amounts of hard and in both alumina, magnesia and into the blast furnace, operations. and then sinter the ore Phosphorus, present in very replacement-type proved Sulphur bodies in the district. originally charged directly search with silica, present, although low in average sulphur content. found in all to the life of as bodies, consists of hematite, associated with magnetite ore from 10 to 47 per cent and occurs replacement type, and minor amounts of other minerals. Hrne estimate in the Iron Mountain District ment and vein formations. nearly capacity, among reserves. ore ore impossible any precise and pre It also contains quartz, apatite and calcite. some hematite, This ore dense, high in grade, and exceptionally low in impurities. 49See Young, OPe is It cit., pp. 6-7. I, |
