Production of Ferronickel and Ferrovanadium from Fly Ash in an Extended Arc Flash Reactor
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This paper describes an application of a new smelting system involving a plasma furnace which makes it possible to smelt concentrate powders, eliminating the necessity for agglomeration or pelletization. The ratio of surface area to volume of concentrate particles is high, which is advantageous with regard to gas/solid reaction kinetics and production rates. Also, fine ores or concentrates which cannot be readily consolidated by conventional processes can be employed directly in this system. The paper describes the application of this technique for the pyrometallurgical recovery of nickel and vanadium from the fly ash produced in oil-fired thermal generating power stations. Ferronickel with 30–40% nickel and ferrovanadium with 50–60% vanadium were produced in a two-stage process. The iron and nickel recoveries were about 90%, while the vanadium recovery was about 85%.
KeywordsVanadium Anthracite Vanadium Oxide Petroleum Coke Slag Phase
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