Promising Directions of the Application for Poor Raw Materials of the Ferroalloy Production
The mineral base state for Russian manganese and chromium ores does not allow our country in the foreseeable future to achieve complete self-sufficiency and to abandon imported raw materials. But the problem can be significantly mitigated due to the partial involvement in the operation of the proven ore reserves with relatively low quality. Based on the performed research, four main directions are formulated that would make it possible to put into operation a number of previously known but out-of-use (or poorly used) deposits of poor mineral raw materials for the ferroalloy production: (1) selective reduction of ore components divided into metal semi-products with a low main component content suitable for the smelting of the alloyed steel grades and an oxide product with a high content of Mn or Cr oxides suitable for the smelting of the high-grade ferroalloy grades; (2) rational additional charging of poor domestic ores to beneficiate imported ones to obtain standard grades of ferroalloys; (3) smelting of new alloys, including marketable high-carbon ferromanganese and ferrochrome with reduced main component content, high silicon content, and complex ferroalloys containing, in addition to the main, other elements necessary for the composition of a number of steel grades (silicon, manganese, titanium, etc.); and (4) production of limited grades of ferro-, silico-manganese, and chromium and their application in smelting of the ferroalloys refined grades.
Keywords: metallurgy, ferroalloys, mineral resource base, poor ores
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