Method for producing titanium tetrachloride through high-efficiency long-period operation of boiling chlorination system

Abstract

The invention relates to a method for producing titanium tetrachloride by high-efficiency long-period operation of a fluidizing chlorination system, which comprises the following steps of: preparing low-calcium-magnesium high-titanium slag, high-titanium slag and rutile into a titanium-rich raw material by adopting the fluidizing chlorination system; pressure points are arranged at the furnace bottom of the fluidizing chlorination furnace, the reaction section of the fluidizing chlorination furnace, the furnace top of the fluidizing chlorination furnace, the titanium tetrachloride spraying opening and the inlet of the cyclone dust collector; temperature points are arranged at the reaction section of the fluidizing chlorination furnace, the furnace top of the fluidizing chlorination furnace and a titanium tetrachloride spraying opening, and the fluidizing chlorination reaction can be smoothly carried out by controlling the temperature and the pressure of each point. The method has the advantages that the process is simple, the system runs stably, the blockage of boiling chlorination pipelines and equipment is reduced or avoided, the operation period is prolonged, and the yield and production efficiency of titanium tetrachloride are improved.

Description

technical field [0001] The invention relates to a method for producing titanium tetrachloride through high-efficiency long-period operation of a boiling chlorination system. Background technique [0002] Titanium tetrachloride is an important raw material for the production of titanium metal, titanium dioxide and various organic / inorganic titanium-containing compounds. At present, the preparation of titanium tetrachloride mainly includes molten salt chlorination method and boiling chlorination method. The boiling chlorination method uses the action of fluid to suspend solid particles, so that solid particles have some apparent characteristics of fluid, and strengthens gas - Contact between solid, liquid-solid, gas-liquid-solid, and complete the reaction under specific conditions. Because of its simple equipment structure, large production capacity, relatively small environmental pollution, and high degree of automation, it has become the main method of titanium tetrachlorid...

AI Technical Summary

Problems solved by technology

In order to ensure the long-term operation of the boiling chlorination method and strictly control the content of calcium and magnesium in raw materials, it is necessary to use low-calcium and magnesium-rich titanium materials and strictly control the content of impurities. TiO 2 ≥90%, calcium oxide2 o 3 with Cl 2 The reaction produces a large amount of metal chlorides with low melting point and high boiling point (CaCl 2 , MgCl 2 , MnCl 2 , FeCl 3 ), these metal chlorides are in a molten state during the chlorination process. As the reaction progresses, they accumulate more and more in the bed, and bond with the raw titanium-rich material and calcined coke particles, deteriorating the boiling fluidization state, resulting in The temperature and pressure in the boiling chlorination furnace are not easy to control, and the production system is blocked, so it needs to be stopped for cleaning

[0004] Moreover, the production of boiling chlorination needs to control the heat of reaction in the furnace by adjusting the amount of chlorine gas. During the reaction process, the reaction heat in the furnace is too high, the temperature in the furnace is too high, and the furnace bricks are easily damaged, which affects the long-term operation of the boiling chlorination furnace. Bring burden to furnace gas leaching and cooling, reduce output and increase tail gas pressure

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