Process for producing titanium tetrachloride in fluidizing chlorination furnace by using artificial rutile

Abstract

The invention discloses a process for producing titanium tetrachloride in fluidizing chlorination furnace by using artificial rutile. The process includes five steps of: furnace baking, control of feeding, control of chlorination, tail gas slagging and cyclone dust collection. According to the process, the preparation of titanium tetrachloride by using the fine-sized artificial rutile is achieved, and meanwhile the collection and recycle of the artificial rutile in dust slag which is not completely reacted are also achieved.

Description

technical field [0001] The invention relates to the technical field of chemical metallurgy, in particular to a process for producing titanium tetrachloride in a fluidized chlorination furnace using artificial rutile. Background technique [0002] Boiling chlorination is the main process for producing titanium tetrachloride. It is to feed the mixture of titanium-containing material and petroleum coke into the reaction section of the boiling chlorination furnace through the feeding port set on the boiling chlorination furnace. It becomes a fluidized state, and at a temperature of 800-1000°C, chlorine gas and titanium raw materials undergo a chlorination reaction. [0003] Boiling chlorination furnace is the key equipment for boiling chlorination. Existing fluidized chlorination furnaces such as Figure 4 As shown, including the furnace body and the furnace chamber A1 surrounded by the furnace body, the furnace chamber A1 is divided into a settlement section A101, an expansio...

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Problems solved by technology

But this method is owing to adopting phosphorus-containing compound as the high production cost of activation modifier, the artificial rutile of generation, the fine particle that particle diameter is less than<0.1mm accounts for about 75%, wherein the fine particle that particle diameter is less than 0.074mm accounts for about 40% %about

Fine-grained artificial rutile refers to artificial rutile made by hydrochloric acid leaching method. This kind of artificial rutile has many micropores and low packing density. If the existing boiling chlorination method is used to produce titanium tetrachloride, artificial rutile with too fine particle size , it is not easy to establish a good fluidization, and technical problems such as channeling and surging are prone to occur, resulting in poor contact between artificial rutile particles and chlorine gas, and low chlorination efficiency; at the same time, it will also cause a large amount of fine-grained artificial rutile to be carried by the gas out, causing a lot of waste of raw materials

[0009] In summary, the existing artificial rutile method, the artificial rutile produced by the sulfuric acid method, the content of TiO2 is only 70-80%, and the content of CaO+MgO is as high as 7%-11%, which cannot meet the requirements of the boiling chlorination process. TiO2 content > 90%; fine-grained artificial rutile produced by hydrochloric acid leaching method, the fine particles with a particle size of less than <0.1mm account for about 75%, and the fine particles with a particle size of less than 0.074mm account for about 40%. The raw material particle size required by the boiling chlorination process is between 0.1mm and 0.25mm, that is, the existing artificial rutile cannot be produced by the existing boiling chlorination process to produce titanium tetrachloride

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