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A kind of titanium tetrachloride production method and system

A technology of titanium tetrachloride and production method, applied in the directions of titanium tetrachloride, titanium halide, etc., can solve the problems of affecting the normal production of chlorination, reducing the heat exchange efficiency of titanium tetrachloride, easy blockage of heat exchangers, etc. Avoid the effect of low heat exchange efficiency, improve technical level, and low maintenance cost

Active Publication Date: 2022-08-02
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the solid content of the rinsing system in industrial production is usually returned to the chlorination furnace as return mud without much treatment, and the titanium tetrachloride slurry returned to the chlorination furnace usually passes through a heat exchanger to reduce the concentration of titanium tetrachloride. Slurry temperature, if the solid content in crude titanium tetrachloride is too high, it will cause the heat exchanger to be easily blocked, reduce the heat transfer efficiency of titanium tetrachloride, and affect the normal production of chlorination in severe cases

Method used

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  • A kind of titanium tetrachloride production method and system
  • A kind of titanium tetrachloride production method and system

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Experimental program
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Effect test

Embodiment 1

[0052] A kind of production method of titanium tetrachloride using solid-liquid separation device

[0053] a. The temperature of the crude titanium tetrachloride slurry system in the leaching system is less than 135 °C to ensure that the titanium tetrachloride is still in the liquid phase;

[0054] b. Open the inlet valve of the crude titanium tetrachloride slurry, and the crude titanium tetrachloride slurry enters the rotating inner pipe from the feed pipe of the solid-liquid separation device. The temperature of the crude titanium tetrachloride slurry is 45℃~100℃, and the flow rate is 50kg / min ~120kg / min; wherein, the solid content in the crude titanium tetrachloride slurry is 60g / L~150g / L;

[0055] c. The rotating inner tube rotates at a high speed under the driving action of the motor, so that the thick titanium tetrachloride slurry is thrown to the inner wall of the rotating inner tube under the action of centrifugal force. Filtration device, the solid phase is enriched ...

Embodiment 2

[0059] The crude titanium tetrachloride slurry with a flow rate of 100kg / min, a temperature of 50°C and a solid content of 81.5g / L enters a rotating tube with a rotational speed of 250r / min and rotates for 5 minutes, and the gas flow rate is 200m 3 / h N 2 After purging for 2 minutes, the solid content of the separated titanium tetrachloride liquid was 3.08 g / L, and the solid-liquid separation efficiency of the titanium tetrachloride slurry was 96.22%.

Embodiment 3

[0061] The crude titanium tetrachloride slurry with a flow rate of 120kg / min, a temperature of 50°C and a solid content of 85.8g / L enters a rotating tube with a rotational speed of 200r / min and rotates for 5 minutes, and the gas flow rate is 200m 3 / h N 2 After purging for 2 minutes, the solid content of the separated titanium tetrachloride liquid was 4.19 g / L, and the solid-liquid separation efficiency of the titanium tetrachloride slurry was 95.45%.

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Abstract

The invention discloses a titanium tetrachloride production method and system. The production system includes a chlorination furnace, a solid-liquid separation device, a heat exchanger and a rinsing system, wherein the reaction product outlet of the chlorination furnace is connected to the rinsing system. Washing system, the material outlet of the washing system is connected to the solid-liquid separation device, the liquid phase outlet of the solid-liquid separation device is connected to the liquid inlet of the heat exchanger through a return branch pipe, and the solid-liquid separation device is The liquid phase outlet is connected to the next process through the rinsing branch pipe, and the liquid outlet of the heat exchanger is connected to the material inlet of the chlorination furnace. It separates the crude titanium tetrachloride slurry from the chlorination furnace through a solid-liquid separation device for solid-liquid separation. After the separation is completed, part of the liquid phase is returned to the chlorination furnace through heat exchange in a heat exchanger, and the rest of the liquid phase enters the next process. The technical problem caused by the high solid content of crude titanium tetrachloride in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide production, in particular to a method and system for producing titanium tetrachloride. Background technique [0002] Chlorinated titanium dioxide has gradually become the mainstream process of domestic titanium dioxide production due to its technology, environmental protection and product quality. Titanium tetrachloride prepared by chlorination of titanium-containing materials is the intermediate core raw material for the production of titanium dioxide by the chlorination method. The chlorination method includes molten salt chlorination and boiling chlorination. The raw materials of the chlorination method are basically artificial rutile, high titanium slag, natural rutile, etc. containing TiO 2 Titanium-rich material with high content. In the process of boiling chlorination of titanium-rich materials, due to the low melting point of calcium and magnesium chloride, it is easy to block t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/02
CPCC01G23/024
Inventor 宋兵凌鹏王建鑫李良
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP