Coarse titanium tetrachloride vanadium removal device and method

Abstract

The invention provides a coarse titanium tetrachloride vanadium removal device and method. The device comprises a heating kettle, a reactor, a concentration collection unit, a spray head, a pipeline and an organic matter, wherein the coarse titanium tetrachloride is heated by the heating kettle to between a boiling point of TiCl4 and 150 DEG C so as to form mixed steam containing TiCl4 gas, VOCl3 gas and air; the reactor comprises a closed container body, a mixed steam inlet which is arranged on the lower part of the container body, an organic matter inlet which is arranged on the upper part of the container body, a second mixed steam outlet which is arranged on the upper part of the container body and a slag discharging port which is arranged on the bottom of the container body; the organic matter is stored in the container body and reacts with the VOCl3 gas in the mixed steam to generate vanadium-containing precipitate; one end of the pipeline is communicated with a first mixed steam outlet, and the other end is communicated with the mixed steam inlet and extends into the reactor; the spray head is arranged on the other end of the pipeline so as to atomize the mixed steam, and the atomized steam is sprayed to the lower part of the organic matter in the container body; the condensation collection unit is communicated with the second mixed steam outlet.

Description

technical field [0001] The invention relates to the field of smelting titanium tetrachloride, in particular to a device and method for refining titanium tetrachloride. Background technique [0002] Titanium tetrachloride (TiCl 4 ) is the most important intermediate product for the production of pigment titanium dioxide, titanium sponge and titanium series products, industrial coarse TiCl 4 Usually contain a variety of harmful impurities, the composition is very complex. [0003] Crude TiCl 4 Vanadium removal is refined TiCl 4 an important process. Not only to remove impurity vanadium for decolorization, but also to remove oxygen. In crude TiCl 4 Among them, vanadium is mainly VOCl 3 form, its boiling point is 127.2°C, and TiCl 4 The boiling point of 136.4 ° C is close to that of TiCl 4 —VOCl 3 The boiling point difference is 9.2°C, and their relative volatility is α=1.22. Therefore, it is difficult to separate by general physical distillation methods, and chemical...

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Problems solved by technology

The applicant conducted an experiment according to the above method, and found that there are many residues in the process of vanadium removal, and the residues are easy to foul the equipment, seriously affecting heat transfer, requiring frequent treatment, and the effect of vanadium removal is poor

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