Method for preparing ferro-titantium, steel and ferrovanadium from vanadium-titantium iron headings

Abstract

This invention provides a method for manufacturing FeTi, steel and FeV with FeVTi mineral concentrate including the following steps: 1, adding alkali metal to recover FeTiV mineral concentrate, 2, smelting and separating recovered Fe, 3, dephosphorizing of iron melt containing V, 4, entering into the steel converter to blow V melting and casting, 5, melting iron melt containing V with steel slag to air-refine V-rich slag with oxygen, 6, melting FeV with the V-rich slag, 7, smelting FeTi by melting slag. The advantages are: 1, avoiding the shortcoming of not recovering Ti in the converter and single-slag return flow and avoiding the shortcoming of low recovery rate of Fe in the Fe first and V second flow, 2, turning slag into the raw material of cement by adjusting composition of the smelted solvent, 3, avoiding complicated V-extraction composition of the technology by immersion.

Description

technical field

[0001] The invention relates to the field of metallurgy, in particular to a method for preparing ferro-titanium, steel and ferro-vanadium from ferro-vanadium-titanium concentrate. Background technique

[0002] The utilization of vanadium-titanium iron ore concentrate, the methods currently adopted mainly include:

[0003] 1. Blast furnace-converter process. The process uses an ordinary blast furnace to smelt molten iron containing 0.4% V under the conditions of large air volume, high humidity and acidic slag, and then uses a top-blown converter to oxidize the V in the molten iron to V 2 o 5 The content is 14% vanadium slag, and the obtained semi-steel is made with another converter, and the vanadium slag is extracted by water method to produce V with a content > 99%. 2 o 5 , and then the V 2 o 5 Smelted into ferrovanadium.

[0004] 2. Process of vanadium first and then iron. The process uses a rotary kiln to sodiumize and roast the vanadium-titaniu...

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