Method for preparing titanium dioxide by using high-titanium-type blast furnace slag

A technology of titanium dioxide and blast furnace slag, applied in the direction of titanium dioxide, titanium oxide/hydroxide, titanium halide, etc., can solve the problem of waste of materials, and achieve the effect of avoiding waste of resources, significant economic benefits and good product quality

Inactive Publication Date: 2018-12-11
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

[0004] The technical problem to be solved by the present invention is to use high-titanium blast furnace slag to prepare titanium dioxide, fully recycle the titanium in high-titanium blast furnace slag, and avoid material waste

Method used

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  • Method for preparing titanium dioxide by using high-titanium-type blast furnace slag
  • Method for preparing titanium dioxide by using high-titanium-type blast furnace slag
  • Method for preparing titanium dioxide by using high-titanium-type blast furnace slag

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Effect test

Embodiment 1

[0043] A. Carry out high-temperature carbonization treatment of high-titanium blast furnace slag to make TiO 2Transformed into TiC, after cooling and crushing, carbide slag is formed as the raw material required for the low-temperature chlorination process. The carbide slag is crushed and processed into separate materials with a particle size of 200-300 mesh, and the weight percentage of TiC in the material is 8-11%;

[0044] B. Supply the carbide slag and chlorine gas obtained in step A to the chlorination reactor in a mass ratio of 3:1, and carry out low-temperature selective chlorination reaction at 580-650°C for 30-35 minutes to obtain TiCl-containing 4 Chlorination reaction mixture of gas, the gas mixture is condensed to room temperature to obtain liquid crude TiCl 4 (liquid crude TiCl 4 can be stored in dedicated storage tanks);

[0045] C, adopt fatty acid to step B gained liquid thick TiCl 4 (fatty acid and crude TiCl 4 The mass ratio is 1:57.5) to remove vanadium ...

Embodiment 2

[0049] A. Carry out high-temperature carbonization treatment of high-titanium blast furnace slag to make TiO 2 Transformed into TiC, after cooling and crushing, carbide slag is formed as the raw material required for the low-temperature chlorination process. The carbide slag is crushed and processed into separate materials with a particle size of 200-300 mesh, and the weight percentage of TiC in the material is 8-11%;

[0050] B. Supply the carbonized slag and chlorine gas obtained in step A to the chlorination reactor at a mass ratio of 1:3, and carry out a low-temperature selective chlorination reaction at 580-650°C for 30-35 minutes to obtain TiCl-containing 4 Chlorination reaction mixture of gas, the gas mixture is condensed to room temperature to obtain liquid crude TiCl 4 (liquid crude TiCl 4 can be stored in dedicated storage tanks);

[0051] C, adopt fatty acid to step B gained liquid thick TiCl 4 (fatty acid and crude TiCl 4 The mass ratio is 1:58) to remove vanad...

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Abstract

The invention discloses a method for preparing titanium dioxide by using high-titanium-type blast furnace slag, and belongs to the technical field of the steel smelting. In order to adequately recycletitanium on the high-titanium-type blast furnace slag, and avoid resource waste, the provided method for preparing the titanium dioxide by using the high-titanium-type blast furnace slag comprises the following steps: performing high-temperature carbonization treatment on the high-titanium-type blast furnace slag, crushing, to obtain carbonized slag; performing a low-temperature chlorination reaction on the carbonized slag and a chlorine gas, to obtain a chlorination reaction mixture containing a TiCl4 gas, after condensing, to obtain crude TiCl4; performing vanadium removing treatment on thecrude TiCl4 by using fatty acid, rectifying, to obtain fine TiCl4; and performing an oxidization reaction on the fine TiCl4 and O2, to obtain an oxidization reaction mixing product containing TiO2 and Cl2, cooling, filtering, to obtain TiO2 and the chlorine gas. The method is capable of adequately recycling the titanium in the high-titanium-type blast furnace slag, and avoiding the resource waste, low in process cost, and good in product quality.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a method for preparing titanium dioxide by using high-titanium blast furnace slag. Background technique [0002] The titanium element in the vanadium-titanium magnetite in the Panxi area enters the blast furnace slag after smelting in the blast furnace and becomes a high-titanium type blast furnace slag, in which TiO 2 The content is 21% to 25%. At present, the utilization of high-titanium blast furnace slag in China is still low-end, and it is mainly used to make slag cement, sanitary porcelain plates, microcrystalline cast stone, alkali-resistant glass and alkali-resistant mineral wool, etc. TiO in slag 2 Not recycled, resulting in a waste of resources. [0003] At present, there are no targeted reports and studies on the process and method of preparing titanium dioxide from high-titanium blast furnace slag at home and abroad. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/07C01G23/02
CPCC01G23/022C01G23/07C01P2006/80
Inventor 周艾然陆平王建鑫万健龙高毅安
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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