TiCl4 preparation process and system

Abstract

The invention discloses a TiCl4 preparation process. The process comprises the following steps: mixing vanadic titanomagnetite, a binder and water according to a mass ratio of 100:(1-2.5):(6-9) to obtain raw balls, and carrying out drying, preheating and roasting on the raw balls to obtain oxidized pellets; sending the oxidized pellets into gas-based reduction equipment for direct reduction to prepare vanadium-titanium metallized pellets; sending the vanadium-titanium metallized pellets into a melting furnace for melting, and carrying out slag-iron separation to obtain titanium-containing slag; crushing the titanium-containing slag, carrying out grinding to obtain the titanium slag, adding the titanium slag and a carbon raw material into a chlorination reaction furnace containing a moltensalt with a semi-molten state according to the mass ratio of 100:(11-15), introducing chlorine gas into the chlorination reaction furnace after the molten salt is completely melted, and carrying out chlorination reaction to obtain gaseous TiCl4; condensing the gaseous TiCl4 by a condensing device to obtain crude TiCl4; and carrying out refining process on the crude TiCl4 to obtain refined TiCl4. The method can be used to effectively recover titanium resources, improve the recovery rate of the titanium resources, reduce energy consumption and reduce environmental pollution.

Description

technical field [0001] The invention relates to the technical field of chemical metallurgy, in particular to a method of directly reducing vanadium-titanium magnetite concentrate-melting-molten salt chlorination to prepare TiCl 4 process and system. Background technique [0002] The current TiCl in the world 4 The production methods mainly include boiling chlorination method and molten salt chlorination method. The basic principle of the two production methods is that under certain temperature and carbon addition conditions, the TiO in titanium slag 2 Components and Cl 2 The reaction produces TiCl 4 . Boiling chlorination method requires TiO in titanium slag 2 The content is generally more than 90%, which is called artificial rutile; while the molten salt chlorination method generally requires TiO in titanium slag 2 The content reaches more than 85%. The production of artificial rutile requires the use of natural rutile concentrate, TiO 2 The grade is generally above...

AI Technical Summary

Problems solved by technology

Obviously, this process will lead to an increase in energy consumption per unit of product. At the same time, the utilization rate of titanium resources in this process is about 10%, and more than 50% of titanium resources enter the vanadium-titanium magnetite concentrate, and TiO is obtained by blast furnace smelting. 2 About 21% titanium-containing blast furnace slag, aggregated TiO 2 It is more difficult and is currently mainly used for low value-added building materials, resulting in a great waste of titanium resources

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