Titanium dioxide preparing equipment and oxidation technology process

Abstract

The invention discloses titanium dioxide preparing equipment. The titanium dioxide preparing equipment comprises a front-end feeding pipe, an opposite-spraying cooling device and an aggregate bin device, wherein the front-end feeding pipe comprises a first feeding pipe, a second feeding pipe, a third feeding pipe and a first discharging pipe; the opposite-spraying cooling device comprises a fourth feeding pipe, a fifth feeding pipe, a sixth feeding pipe and a second discharging pipe; the first feeding pipe, the second feeding pipe and the third feeding pipe are communicated with the first discharging pipe; the fourth feeding pipe, the fifth feeding pipe and the sixth feeding pipe are communicated with the second discharging pipe; the first discharging pipe is connected with the fourth feeding pipe; and the second discharging pipe is communicated with the aggregate bin device. The titanium dioxide preparing equipment is simple in manufacturing, under a high temperature and a high pressure, gas phase reactants are mixed instantly, reaction is full, termination reaction cooling speed is high, TiO2 generated by reaction is not easily scarred in a high-temperature and high-pressure device wall, the generated TiO2 and a cooling medium are clashed and mixed at a high speed, the cooling speed is high, the titanium dioxide preparing equipment has an air flow crushing effect to bonded TiO2, and a product is more uniform in granularity and more stable in quality.

Description

technical field [0001] The present invention relates to TiO 2 The field of preparation, specifically relates to a titanium dioxide preparation equipment and an oxidation process. Background technique [0002] The production of titanium dioxide by the chlorination method is a technological advancement compared to the sulfuric acid method, with high production efficiency, continuous automatic operation, stable product quality, and less "three wastes" directly discharged. The process flow of the chloride method is short, and the main production process includes three parts: the preparation of titanium tetrachloride, the oxidation of titanium tetrachloride and the surface treatment of titanium dioxide. [0003] The oxidation of titanium tetrachloride is the core process of the production of titanium dioxide by the chloride method, TiCl 4 The oxidation of TiCl is a gas phase reaction, the reaction temperature is about 1200 ° C, TiCl 4 Generate TiO 2 The reaction time is only ...

AI Technical Summary

Problems solved by technology

Oxidation reactor is TiCl 4 Oxidation key equipment, equipment and production technology are complex and difficult

First at high temperature TiCl 4 It is highly corrosive, and has strict requirements on the strength, temperature resistance and corrosion resistance of all materials at temperatures above 1000°C, followed by TiCl 4 , O 2 , AlCl 3 Not only the mixing should be uniform, but also the speed of mixing and injection is very fast. According to domestic and foreign materials, the injection speed is 150-200m / s, so the process and equipment of high-speed mixing are very difficult; and it is necessary to use the control reactant within 0.01-0.05 seconds residence time to adjust the TiO 2 The grain size is also very difficult; due to the high reaction temperature of titanium dioxide chloride, TiCl at high temperature 4 , O 2 It is highly corrosive to equipment, and the gas phase reaction speed is fast under high temperature and high pressure, which is extremely difficult to control. TiO 2 The scarring is in the wall of the device, which is difficult to remove and affects production

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