Method for preparing chlorinated titanium-enriched materials by fine-particle Panxi titanium concentrates

Abstract

The invention discloses a method for preparing chlorinated titanium-enriched materials by fine-particle Panxi titanium concentrates. The method comprises the following steps: the fine-particle Panxi titanium concentrates are molded and pressed as balls after oxidation roasting and mixing and ball milling with carbon reducing agents, additives and binding agents, are heated under an Ar atmosphere after reduction, and are crushed, milled and magnetically separated to obtain magnetic products and nonmagnetic pulp; the nonmagnetic pulp is filtered and dried to obtain fine-particle titanium-enriched material semi-finished products; dilute hydrochloric acid is used for acid leaching; and the chlorinated titanium-enriched materials are obtained through fusion recrystallization, crushing and screening by the obtained fine-particle titanium-enriched materials. High-grade iron powder can be directly obtained after magnetic separation; the grade MFe of the iron powder is higher than 84%, so thatthe iron powder can be directly sold as products; the grade of titanium dioxide of the chlorinated titanium-enriched materials is higher than 90%; and through fusion recrystallization, the particle size remolding of the fine-particle titanium-enriched materials can be realized, the titanium-enriched materials of 60-140 meshes are more than 85%, and the particle size requirements of the chlorinatedtitanium-enriched materials can be met.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for preparing chlorinable titanium-rich material from fine-grained Panxi titanium concentrate. Background technique [0002] Titanium-rich material generally refers to TiO 2 Titanium slag or artificial rutile with a content of not less than 75% is an important raw material for the production of high-grade rutile titanium dioxide and sponge titanium by the chlorination method. Artificial rutile or natural rutile and other titanium-rich materials react with chlorine gas to produce titanium tetrachloride, which is purified by rectification and then gas-phase oxidation; after rapid cooling, TiO is obtained through gas-solid separation. 2 . The chlorinable titanium-rich material used to prepare titanium tetrachloride should contain TiO 2 85%-95%, the impurity content should be as low as possible, and have a suitable particle size. [0003] my country is a country rich ...

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Problems solved by technology

[0006] For the fine-grained titanium concentrate of Panxi Titanium Mine, the specific chemical composition is shown in the table below, and the particle size is -200 mesh, accounting for 70% to 85%. Due to the fine particle size, it cannot directly enter the rotary kiln for reduction or electric furnace smelting, and must It can be used after pelletizing treatment. In terms of phase structure, the main phase structure is FeTiO 3 And its homogeneous structure formed with impurities such as MgO is difficult to restore, and the particle size of the reduced metallic iron particles is relatively fine, which increases the difficulty of subsequent magnetic separation and separation, so that part of the iron is not separated by magnetic separation and enters the non-magnetic product , causing a waste of iron resources, and increasing the amount of mother liquor and slag in the acid leaching process, the subsequent mother liquor treatment is difficult, and the obtained titanium-rich material and iron powder are of low grade

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