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Method for producing titanium tetrachloride in large-sized high temperature boiling chlorination furnace

A technology of high temperature boiling, titanium tetrachloride, applied in the direction of titanium halide and other directions, can solve problems such as difficulties, and achieve the effect of improving utilization rate, increasing production capacity and reducing cost

Inactive Publication Date: 2013-11-20
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, my country lacks high-grade natural rutile resources and no production of high-grade artificial rutile. Only TiO can be produced from low-grade ilmenite in my country. 2 For high-titanium slag with a content of about 85%, there are only small and medium-sized chlorination furnaces (diameter less than 3m) in China to produce crude titanium tetrachloride. In the process of large-scale titanium dioxide production, the biggest difficulty encountered is titanium tetrachloride It is more difficult to use the above-mentioned high-titanium slag as raw material to produce crude titanium tetrachloride

Method used

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  • Method for producing titanium tetrachloride in large-sized high temperature boiling chlorination furnace

Examples

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Effect test

example 1

[0039] The composition of the high titanium slag adopted in this example contains by weight percentage: TiO 2 85%, FeO9%, Al 2 o 3 2.0%, CaO0.15%, MgO1.0%, SiO 2 1.0%, and 95% of which have a high particle size between 0.15mm and 0.30mm. The diameter of the chlorination furnace used is 5500mm.

[0040] Mix 77 parts of high-titanium slag and 23 parts of petroleum coke evenly to form a mixture, and then use the FK pump to spray the mixture into the chlorination furnace from the feeding port at a speed of 25t / h. At the same time, from the bottom of the chlorination furnace The gas inlet is fed into gas at a speed of 50t / h, wherein chlorine accounts for 73wt%, nitrogen accounts for 27wt%, and the superficial gas velocity above the material layer is controlled between 0.5m / s~0.55m / s; During the chlorination reaction process of the material and chlorine gas, the pressure difference between the air pressure in the dilute phase section of the chlorination furnace and the atmospher...

example 2

[0043] The composition of the high titanium slag adopted in this example contains by weight percentage: TiO 2 88%, FeO8%, Al 2 o 3 1.0%, CaO0.13%, MgO0.5%, SiO 2 1.5%, and 90% of which have a high particle size between 0.15mm and 0.30mm. The diameter of the chlorination furnace used is 5500mm.

[0044] Mix 75 parts of high-titanium slag and 25 parts of petroleum coke evenly to form a mixture, and then use the FK pump to spray the mixture into the chlorination furnace from the feeding port at a speed of 20t / h. At the same time, from the bottom of the chlorination furnace The gas inlet is passed into the gas at a speed of 41t / h, wherein chlorine accounts for 72wt%, nitrogen accounts for 28wt%, and the superficial gas velocity above the material layer is controlled between 0.5m / s~0.55m / s; During the chlorination reaction process of the material and chlorine gas, the pressure difference between the air pressure in the dilute phase section of the chlorination furnace and the at...

example 3

[0047] The composition of the high titanium slag adopted in this example contains by weight percentage: TiO 2 86%, FeO8.5%, Al 2 o 3 1.5%, CaO0.10%, MgO0.75%, SiO 2 2.0%, and 93% of which have a high particle size between 0.15mm and 0.30mm. The diameter of the chlorination furnace used is 5500mm.

[0048] Mix 80 parts of high-titanium slag and 20 parts of petroleum coke evenly to form a mixture, and then use the FK pump to spray the mixture into the chlorination furnace from the feeding port at a speed of 23t / h. At the same time, from the bottom of the chlorination furnace The gas inlet is fed into gas at a speed of 45t / h, wherein chlorine accounts for 80wt%, nitrogen accounts for 20wt%, and the superficial gas velocity above the material layer is controlled between 0.5m / s~0.55m / s; During the chlorination reaction process of the material and chlorine, the pressure difference between the air pressure in the dilute phase section of the chlorination furnace and the atmospheri...

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Abstract

The invention provides a method for producing titanium tetrachloride in a large-sized high temperature boiling chlorination furnace. The diameter of the chlorination furnace is more than 4,000 millimeters. The method comprises the following steps of: mixing 75-80 parts by weight of high titanium slag and 20-25 parts by weight of carbon reducer uniformly to form a mixture, and spraying the mixture into the chlorination furnace from a feeding hole to produce chlorination reaction with chlorine introduced from an air inlet; in the chlorination reaction process, controlling the pressure difference between the gas pressure in the dilute phase zone of the chlorination furnace and the atmospheric pressure at 0.08-0.10MPa, controlling the material height of the solid material in the furnace at 2.8-3.2 meters, controlling the material temperature at 900-1,050 DEG C, and discharging slag and spraying a fresh mixture to ensure that the weight sum of the high titanium slag and the carbon reducer accounts for more than 50 percent of the weight of the solid material in the furnace. By adopting the method, the chlorination technical level (comprising improvement on the chlorination rate of titanium, the utilization rate of chlorine, the productivity of the chlorination furnace and the like) of the large-sized chlorination furnace can be improved.

Description

technical field [0001] The invention relates to the field of titanium dioxide production by chlorination method, more specifically, relates to a method for producing crude titanium tetrachloride by pressurized boiling chlorination. Background technique [0002] At present, the industrial production methods of titanium dioxide mainly include sulfuric acid method and chloride method. The sulfuric acid method is to use sulfuric acid to decompose titanium ore into TiOSO 4 , after purification and concentration, the titanium solution is hydrolyzed into TiO 2 ·H 2 O, the product is obtained after washing, filtering, and calcination, and the rutile product needs surface treatment. This process is characterized by a wide source of raw materials, low grade requirements, and easy production technology, but it has a long production process, fine operation requirements, and a large amount of "three wastes" emissions. The chlorination method uses natural rutile, artificial rutile or ...

Claims

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Application Information

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IPC IPC(8): C01G23/02
Inventor 刘森林陆平杨仰军王建鑫杜明
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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