Smelting system for separating and enriching vanadium and producing pure iron from iron ore concentrate

Abstract

The invention discloses a smelting system for separating and enriching vanadium and producing pure iron from iron ore concentrate. The smelting system comprises a vanadium titano-magnetite pellet, a coal-based vertical furnace and an electric-arc furnace, wherein the vanadium titano-magnetite pellet is obtained after pelleting and drying a vanadium titano-magnetite ore; the coal-based vertical furnace is used for selectively reducing the vanadium titano-magnetite pellet to obtain a metalized pellet; and the electric-arc furnace is used for smelting separating and enriching of the metalized pellet inside the electric-arc furnace. By adopting the smelting system disclosed by the invention, the recycle rate of vanadium is as high as 93% or higher, and the grade of vanadium slag is 6%-8%. Meanwhile, the purity of molten steel obtained through smelting separating is high, the iron content is as high as 99.7% or higher; moreover the content of phosphorus, sulfur, silicon, manganese and titanium in the molten steel is low; and magnetic pure iron and military pure iron can be produced in a simple smelting way.

Description

Technical field: [0001] The invention belongs to the technical field of nonferrous metallurgy, and in particular relates to a smelting system for separating and enriching vanadium from iron concentrate and producing pure iron. Background technique: [0002] Iron and steel materials are the basic products of my country's industry, with large output and many types of products, and the prices of different types of products vary greatly. The raw materials for the production of industrial pure iron are usually ordinary iron concentrate powder and vanadium-titanium magnetite. [0003] At present, most domestic enterprises producing industrial pure iron use traditional ordinary iron concentrate powder as raw material, and adopt the long process of "sintering (or pellets)-blast furnace ironmaking-steel refining-continuous casting-hot rolling" for industrial production. Pure iron, but because industrial pure iron has extremely strict requirements on the content of slag inclusions, t...

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Problems solved by technology

[0008] From the perspective of the utilization of vanadium resources, whether it is "blast furnace + converter process" or "direct reduction + submerged arc furnace melting deep reduction process" for vanadium extraction process of vanadium-titanium magnetite, vanadium is first reduced into In molten iron, vanadium is extracted by subsequent reoxidation, and the recovery rate of vanadium is relatively low; from the perspective of iron resource utilization, the molten iron produced by traditional processes has complex components, and most of them produce low value-added products

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