A method for separating vanadium, titanium and iron from vanadium-titanium magnetite concentrate

Abstract

The application provides a method for separating vanadium, titanium and iron from vanadium-titanium magnetite concentrate. The method includes: batching, mixing and pelletizing vanadium-titanium magnetite concentrate, high-volatile coal, binder and aggregation agent in a ratio of 100:38-40:1-3:1-2 to obtain pellets The pellets are sent to the rotary hearth furnace and roasted to reduce the vanadium-titanium magnetite concentrate with high-volatile coal and produce reduced materials; the reduced materials are subjected to dry grinding and dry separation and electric furnace melting to obtain semi- Steel, vanadium-rich titanium tailings and vanadium-rich titanium slag; semi-steel is processed to obtain iron products, and vanadium-rich titanium tailings and vanadium-rich titanium slag are processed to obtain vanadium and titanium products. The method not only greatly improves the recovery rate of separating vanadium, titanium and iron from the vanadium-titanium magnetite concentrate, but also reduces the difficulty of separating iron and vanadium-titanium during the separation process.

Description

technical field [0001] The invention relates to the technical field of metallurgy and mineral engineering, in particular to a method for separating vanadium, titanium and iron from vanadium-titanium magnetite concentrate. Background technique [0002] Vanadium-titanium magnetite concentrate is a composite ore containing vanadium, titanium, iron and other valuable elements such as scandium, chromium, cobalt, copper, nickel and other symbiotic elements. Among them, vanadium has excellent physical and chemical properties, so it is Known as "the monosodium glutamate of modern industry", it is widely used in aerospace, machinery manufacturing, chemical batteries and bridges and other fields. Due to its stable chemical properties, high temperature resistance, corrosion resistance and high strength, titanium is called "space metal" and is widely used in aerospace, medicine, military and other fields. Therefore, efficient utilization of vanadium-titanium magnetite concentrate resou...

AI Technical Summary

Problems solved by technology

Since the iron grade of vanadium-titanium magnetite concentrate is generally low, it cannot be directly added to the blast furnace for smelting. It is necessary to obtain vanadium-titanium magnetite concentrate with higher iron grade through magnetic separation, flotation, gravity separation and combined beneficiation process in advance. During the grinding process, about 75-85% of titanium enters the iron concentrate. The vanadium-titanium iron concentrate is mixed with 30% ordinary iron concentrate and then sintered. The sintered ore is added to the blast furnace for smelting to produce vanadium-containing molten iron, and titanium enters the slag phase, the problems of this process are: the titanium content in the slag discharged from the blast furnace smelting of vanadium-titanium magnetite concentrate is generally 22-27%, and the titanium oxide exists in the form of glass phase, not only This part of the titanium resource cannot be recycled, and the viscosity of the slag is high, which has an adverse effect on the separation of slag and iron and slag discharge in the blast furnace. shortcoming

In this method, due to the low metallization rate of the vanadium-titanium magnetite concentrate after carbon reduction in the reduction furnace, the melting time of the reduced material in the electric furnace and the separation of slag and iron are long, the viscosity of the titanium slag is high, and the iron slag is difficult to separate. The problem of high energy consumption in production

[0009] As can be seen from the above, the existing methods for separating vanadium, titanium, and iron from the vanadium-titanium magnetite concentrate have a low recovery rate of vanadium, titanium, and iron separated from the vanadium-titanium magnetite concentrate, and in the separation process, iron and vanadium Titanium is not easy to separate

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