Method for separating and enriching vanadium from iron concentrate and producing pure iron

Abstract

The invention discloses a method for separating and enriching vanadium from iron concentrate and producing pure iron. The method comprises the following steps that after vanadium-titanium magnetite ore is pressed into balls and dried, vanadium-titanium magnetite ore pellets are obtained, the vanadium-titanium magnetite ore pellets are directly reduced through a coal based shaft furnace, metallizedpellets are obtained, and the metallized pellets are subjected to melting, separating and enriching in an electric-arc furnace. According to the method, the vanadium recovery rate reaches 93% or above, the vanadium slag grade is about 6-8%, meanwhile, the purity of molten steel obtained through melting and separating is high, the iron content reaches 99.7% of above, in addition, the contents of phosphorus, sulphur, silicon, manganese and titanium in the molten steel are low, and electromagnetic pure iron and military pure iron can be produced through simple refining.

Description

Technical field: [0001] The invention belongs to the technical field of nonferrous metallurgy, in particular to a method 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, the refining requireme...

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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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