A low temperature boiling chlorination system

Abstract

The invention provides a low-temperature boiling chlorination system. The low-temperature boiling chlorination system comprises a low-temperature boiling chlorination furnace, a feeding device and an upper deslagging pipe, wherein an upper group and a lower group of gas distributors are arranged in the low-temperature boiling chlorination furnace so as to lead in a chlorine gas taken as a reaction gas from the upper part of a reaction segment and spray a fluidized gas into the bottom of the furnace; the feeding device is used for feeding carbide slags into the bottom of the furnace; the upper deslagging pipe is arranged at the upper part of the reaction segment; and after the carbide slags enter the furnace bottom of the low-temperature boiling chlorination furnace, the carbide slags are in a fluidized state under the action of the fluidized gas and move upwards to come into countercurrent contact with the chlorine gas so as to generate a chlorination reaction. According to the low-temperature boiling chlorination system provided by the invention, the application efficiency of the chlorine gas and the chlorination rate of the carbide slags are improved; and the continuous production, the stable deslagging and the large-scale production of the low-temperature boiling chlorination system can be realized.

Description

technical field [0001] The invention relates to the technical field of low-temperature boiling chlorination reaction, and more specifically relates to a low-temperature boiling chlorination system for preparing titanium tetrachloride from carbonized blast furnace slag. Background technique [0002] At present, only Panzhihua Iron and Steel is using high-titanium blast furnace slag (TiO 2 content as high as 20-26wt%) to extract titanium tetrachloride, that is, "high temperature carbonization of blast furnace slag - low temperature selective chlorination to produce TiCl 4 "Technology, which is to use a carbonaceous reducing agent to perform high-temperature reduction carbonization treatment on high-titanium blast furnace slag in an electric furnace, and reduce titanium to titanium carbide (TiC). The blast furnace slag after carbonization treatment is called carbide slag (also known as carbonized blast furnace slag), and then the carbide slag is selectively chlorinated at low ...

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Problems solved by technology

Due to the high density of carbide slag (2.0~2.2t / m 3 ), less active ingredients lead to a higher bed in the furnace, such a furnace structure will lead to some shortcomings, such as excessive diffusion resistance, excessive local pressure, severe furnace vibration, short residence time of raw materials and uneven distribution, and The driving force of reaction and transmission will drop, etc. These problems will seriously affect the chlorination rate of chlorination production, resulting in a large amount of chlorine surplus and chlorination residue, which will bring great pressure to the production system and environment, and it will be difficult to scale up. Need to develop a kind of low temperature boiling chlorination furnace that can solve the above-mentioned technical problems

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