Method for separating vanadium, titanium and iron from vanadium-titanium magnet concentrate

Abstract

The invention provides a method for separating vanadium, titanium and iron from a vanadium-titanium magnet concentrate. The method comprises the following steps that 1, the vanadium-titanium magnet concentrate, high-volatile coal, a binder, and an aggregating agent are dosed according to the proportion of 100:38-40:1-3:1-2, mixed and pelletized to produce a pellet; 2, the pellet is fed into a rotary hearth furnace for roasting so as to reduce the vanadium-titanium magnet concentrate through the high-volatile coal and generate a reducing material; 3, dry grinding and dry-selection and electricfurnace fusion treatment are performed on the reduced material to obtain semi-steel, vanadium-rich titanium tailings and vanadium-rich titanium slag; and 4, the semi-steel is treated to obtain an ironproduct, and the vanadium-rich titanium tailings and the vanadium-rich titanium slag are treated to obtain vanadium and a titanium product. The method not only greatly improves the recovery rate of separating the vanadium, the titanium and the iron from the vanadium-titanium magnet concentrate, but also reduces the difficulty of separating the iron and the vanadium from the vanadium-titanium magnet concentrate.

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

Images