Method for comprehensively utilizing vanadium and titanium resources of vanadium titano-magnetite

Abstract

The invention belongs to the field of chemical engineering and metallurgy, and particularly discloses a method for comprehensively utilizing vanadium and titanium resources of vanadium titano-magnetite. Vanadium slag obtained in the vanadium blowing procedure is returned to the electric furnace melting separation procedure, vanadium is opened from titanium slag, the vanadium extraction path is changed, vanadium-titanium co-extraction is achieved, and the vanadium extraction tailing treatment problem is thoroughly solved. The crushing particle size of the vanadium-containing titanium slag is controlled, fine-particle carbon powder and a binder are added for granulation, ore/carbon contact is enhanced, catalytic chlorination is coupled, and therefore the chlorination reaction temperature is reduced, and the utilization problem of high-calcium magnesium and titanium resources is solved. A vanadium-iron alloy is directly smelted by adding a reducing agent and steel scraps into titanium tetrachloride vanadium removing dry slag, and therefore preparation of a vanadium pentoxide intermediate product is omitted, the process is greatly shortened, and the production cost is reduced. The method can realize comprehensive utilization of the vanadium and titanium resources in the vanadium titano-magnetite to respectively obtain titanium tetrachloride and ferrovanadium alloy products, and has the advantages of being high in resource utilization rate, capable of achieving energy conservation and consumption reduction, friendly to environment, high in product added value and the like.

Description

technical field [0001] The invention belongs to the fields of chemical industry and metallurgy, and particularly relates to a method for comprehensive utilization of vanadium-titanium magnetite, vanadium-titanium resources. Background technique [0002] my country is a country rich in vanadium and titanium resources, and the reserves of vanadium and titanium mines account for more than 35% of the world's total. Vanadium-titanium magnetite is its main form. Vanadium-titanium magnetite is an important strategic vanadium-titanium resource in my country. [0003] At present, my country's vanadium-titanium magnetite mainly adopts the blast furnace smelting process. The vanadium-titanium magnetite is mixed with ordinary iron ore and sent to the blast furnace for smelting to obtain vanadium-containing molten iron and titanium-containing blast furnace slag, and the vanadium-containing molten iron is blown to obtain vanadium slag and semi-steel. Vanadium slag undergoes sodiumizati...

AI Technical Summary

Problems solved by technology

The existing vanadium-titanium-magnetite vanadium resource utilization process mainly has the following problems: (1) During the blast furnace smelting process, about 30% of the vanadium enters the titanium-containing blast furnace slag, and this part of the vanadium resource has not been effectively utilized at present

Sodiumized vanadium extraction tailings have high sodium content and calcified vanadium extraction tailings have high sulfur content, both of which are difficult to return to the blast furnace smelting process, resulting in a large amount of solid hazardous waste and polluting the environment

(3) The traditional sodium / calcification vanadium extraction process is mainly a wet process, accompanied by a large amount of ammonia nitrogen wastewater, which brings serious environmental pollution problems

The upgrading of titanium slag has the problems of high energy consumption and low recovery rate

Moreover, the upgraded titanium slag can only be used as raw material for sulfuric acid process titanium dioxide

If the process of "high-temperature carbonization / nitridation-low-temperature chlorination" is used to treat 50 or 70 titanium slag, although the reaction temperature can be reduced, a large amount of heat will be released during the low-temperature chlorination of high-grade carbon / titanium nitride, and the reactor The problem of heat transfer is difficult to solve

[0007] To sum up, the existing vanadium-titanium-magnetite vanadium resource utilization has the problems of long process, heavy pollution and large amount of tailings

The utilization of titanium resources has the problems of high energy consumption, long process and low yield

Moreover, the extraction of vanadium and titanium is carried out in two different process systems, the process is lengthy and the operation is complicated

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