| Реферат |
Titanomagnetite ores is a complex strategic source of production of iron, titanium and vanadium. In Russia, this commercial ore type embraces around 13 % of proven iron ore reserves, 92 % of vanadium pentoxide reserves and around 48 % of titanium dioxide reserves.Despite such ample reserves, the large-scale commercial development of titanomagnetite ore is yet limited in the country. This is particularly true for high-Ti types of ore, because of the lack of an industrial processing te chnology for the titanomagnetite concentrates. This article reviews the present-day trends in titanomagnetite material processing, with emphasis laid on the multipurpose utilization of the resource. The integrated processing of ore, alongside with titanomagnetite concentrate, can produce ilmenite, apatite, perovskite and sulphide concentrates. The basic pyrometallurgical methods of treatment of the concentrates are discussed, starting from the traditional blast furnace and finishing with the advanced two-stage processes with solid phase reduction, slag practice optimization and combined pyrohydrometallurgical flowsheets. The experience gained by the Mining Institute KSC RAS in integrated processing of titanomagnetite sources from the key mining regions of Russia, namely, the Kola Peninsula, Ural and Siberia, is described. The scope of the analysis encompasses rational ore pretreatment, production of titanomagnetite concentrate, including application of gravityand-magnetic separation, as well as recovery of associate valuable minerals using different techniques. For the integrated technological problem solving and for the home science advancement on the basis of the Kola Science Center RAS, the Engineering Center is being established, with the ready experimental concentration plant. The further equipment of the Center with the pilot modular plants for chemical decomposition, extraction, pyrolysis and bio-leaching will create the required infrastructure for processing of complex concentrates. |
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