Reactor, its device for making titanium tetrachloride using rich state material chlorination and its method

Abstract

A reactor for preparing TiCl4 from enriched raw material is composed of a high-speed fluidized bed, an oblique particle-feeding pipe on its wall, a main body, a conic transition body on the top of main body, and a perforated distributing plate between said conic transition body and main body. The process for preparing TiCl4 features that the flow speed of gas is higher than that of enriched raw material and petroleum coke particle in fluidized bed for ensuring that the circulation bed formed by enriched raw material is overlapped on the dense-phase turbulent bed forme dby petroleum coke particles, so preventing adhesive in reactor.

Description

technical field [0001] The invention relates to the preparation of titanium tetrachloride in industrial production, in particular to a reactor and its device and method for preparing titanium tetrachloride by chlorination of rich materials. Background technique [0002] Titanium tetrachloride (TiCl 4 ) is the production of titanium dioxide (TiO 2 ) and sponge titanium, etc., occupy a very important position in the process of smelting, transformation and utilization of titanium resources. At present, in industrial production, the chlorination method is used to produce TiCl 4 The methods mainly include the molten salt method and the boiling chlorination method. The equipment required for the molten salt method is huge, the operation is complicated, and the production capacity is not high. Especially in the production process, a large amount of waste salt is discharged, which cannot be recycled so far, causing great Secondary pollution. In addition, there are still problems ...

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Problems solved by technology

Compared with the molten salt method, the boiling chlorination method has higher production capacity, simple operation, and no serious waste problems, but the CaCl with a higher boiling point and existing in the liquid phase is generated during the reaction process. 2 , MgCl 2 It will accumulate in a large amount in the bed layer, causing channeling to occur and destroying the fluidized state. Therefore, the fluidized bed chlorination process is too harsh on the raw material, requiring that the weight ratio of CaO and MgO in the raw material must be less than 1%, and because gas Low mass transfer and heat transfer rates between solids lead to low conversion efficiency of rich materials and low production capacity

[0004] From the perspective of the distribution of titanium resources in the world, TiO 2 According to statistics in 1980, TiO 2 The rutile reserves with higher content, which can be directly used for fluidized bed chlorination, account for only 7% (excluding China), and this high-grade rutile deposit is gradually being exhausted; China's titanium resource reserves account for 45% of the world, ranking first in the world First, but it is mainly vanadium-titanium magnetite that is not easy to use, of which more than 90.5% is in Panzhihua, and the rich material Ca and Mg content produced by Panzhihua Mine is high, and the weight ratio of CaO and MgO is as high as 6-9%, which cannot be directly It is used in the fluidized bed chlorination process, which creates a conflict between the source of raw materials and the production process of raw materials, which greatly hinders the utilization and development of titanium resources in China. Therefore, raw materials with high Ca and Mg content can be directly used for The production process of titanium tetrachloride is the trend of future development

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