Method for separating vanadium-titanium magnetite to extract iron, vanadium and titanium

Abstract

The invention discloses a method for separating vanadium-titanium magnetite to extract iron, vanadium and titanium, comprising the following steps of: magnetically selecting raw magnetite, that is, acquiring iron-vanadium concentrate and tail magnetite after performing magnetic selection on the vanadium-titanium magnetite; sorting titanium concentrate from the tail magnetite, that is, acquiring the titanium concentrate after performing floating selection on the obtained tail magnetite; roasting and magnetically selecting the titanium concentrate, that is, performing enriched-titanium impurity-removing magnetic selection after roasting the titanium concentrate; finely selecting the iron-vanadium concentrate, that is, performing the magnetic selection and fine section again on the iron-vanadium concentrate obtained from magnetic selection; reducing and smelting, that is, mixing the titanium concentrate obtained from the impurity-removing process with the iron concentrate according to the beneficiation yield, adding in a reducer and soda ash to perform reduced iron and vanadium smelting process; purifying vanadium slag, that is, removing the impurity of the vanadium slag obtained by reducing and smelting by using the acidic dipping to obtain the high-quality titanium slag product with the content of TiO2 larger than 92%; and extracting vanadium from pig iron, that is, performing vanadium extraction by converter blowing on the vanadium-containing pig iron obtained by reducing and smelting to obtain the semi-steel and vanadium slag. The method not only improves the utilization ratio of titanium, iron and vanadium but also obtains the high-titanium slag product with the content of TiO2 larger than 92% so as to widen the application field of titanium.

Description

[0001] technical field [0002] The invention relates to a method for separating and extracting iron, vanadium and titanium from vanadium-titanium magnetite. Background technique [0003] Vanadium-titanium magnetite is mainly distributed in Canada, Norway, Finland, New Zealand, South Africa, India, Russia, the United States and China, with a total resource reserve of 40 billion tons, of which my country's reserves are nearly 10 billion tons. However, in China, more than 90% of the vanadium-titanium magnetite reserves are concentrated in the Panxi area in western my country. [0004] The Panxi area refers to the Panzhihua-Xichang area in Sichuan, my country. Panxi vanadium-titanium magnetite is a famous super-large vanadium, titanium and iron symbiotic mineral resource in China. Titanium, vanadium and iron are the main value elements. The mineral resources are not only diverse, but also concentrated in origin (96% concentrated in Panzhihua, Baima, Hong Ge, Taihe four major ...

AI Technical Summary

Problems solved by technology

[0010] In order to solve the above problems in the current process of development and utilization of vanadium-titanium magnetite, whether it is a blast furnace process or a direct reduction process, the titanium-containing slag obtained after the separation and extraction of iron and vanadium, TiO 2 The grades are all low, the extraction technology is difficult, and the technical problem that can not be economically and effectively utilized, the present invention proposes a method for separating and extracting iron, vanadium and titanium from vanadium-titanium magnetite. This method not only improves the iron, vanadium and titanium The utilization rate of vanadium, and improve the TiO of smelting titanium slag 2 grade, so that the utilization of titanium slag is more economical and reasonable. At the same time, through further impurity removal and purification of titanium slag, TiO-containing 2 >92%, high-titanium slag products that can be used in the titanium dioxide chloride industry, broaden the application field of titanium

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