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Method for promoting growth of TiC in molten slag

A slag and slag technology is applied in the field of promoting the growth of TiC in the slag, which can solve the problems of high chlorination cost, large consumption of chlorine gas, low chlorination efficiency, etc., so as to reduce environmental pressure, utilize efficiently, and improve chlorination efficiency. Effect

Inactive Publication Date: 2019-01-29
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

TiO 2 Influenced by the content, the grade of TiC in the prepared titanium carbide slag is low, resulting in low chlorination efficiency, large consumption of chlorine gas and high chlorination cost in the subsequent low-temperature chlorination process, so further selection is required before the low-temperature chlorination process Or enrich TiC in titanium carbide slag
However, since the particle size of TiC in titanium carbide slag is small, usually 0.2 μm to 10 μm, and is dispersed in the slag, when sorting or enriching TiC in titanium carbide slag, magnetic separation, acid leaching The difficulty of other processes is relatively large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Titanium carbide slag prepared by smelting high titanium blast furnace slag in electric furnace, TiO in high titanium blast furnace slag 2 The content is 22.5%, and the addition amount is 25.3t. Metallurgical coke powder is used as the reducing agent. The fixed carbon content in the coke powder is 81.3%, and the addition amount is 4100kg. 2 O 16.5%, Na 2 O 13.6% and other oxides of Al, Si, Ca, Mg, mixed with reducing agent and added. In the reaction stage of adding the reducing agent, the reaction temperature is 1550°C-1600°C, and the time is controlled within 50 minutes. After adding the reducing agent, the temperature of the molten pool is raised to 1620°C-1670°C, and the duration is 30 minutes. After the carbonization reaction reaches the end point, open the slag outlet, flow the titanium carbide slag into the slag pan and cool slowly, and break the titanium carbide slag after cooling for 12 hours. The particle size of TiC particles in the titanium carbide slag is m...

Embodiment 2

[0031] Electric furnace smelting titanium-containing slag to prepare titanium carbide slag, titanium-containing slag TiO 2 The content is 31.2%, and the addition amount is 22.7t. Metallurgical coke powder is used as the reducing agent. The fixed carbon content in the coke powder is 81.3%, and the addition amount is 6000kg. 2 O 11.6%, Na 2 O 10.7% and other oxides of Al, Si, Ca, Mg, electric furnace dust and reducing agent are added after mixing. In the reaction stage of adding the reducing agent, the reaction temperature is 1550°C-1600°C, and the time is controlled within 60 minutes. After adding the reducing agent, the temperature of the molten pool is raised to 1620°C-1670°C, and the duration is 40 minutes. After the carbonization reaction reaches the end point, open the slag outlet, flow the titanium carbide slag into the slag pan and cool slowly, and break the titanium carbide slag after cooling for 12 hours. The particle size of TiC particles in the titanium carbide slag...

Embodiment 3

[0033] Electric furnace smelting titanium-containing slag to prepare titanium carbide slag, titanium-containing slag TiO 2 The content is 41.8%, and the addition amount is 20.4t. Metallurgical coke powder is used as the reducing agent. The fixed carbon content in the coke powder is 81.3%, and the addition amount is 6200kg. 2 O 10.7%, Na 2 O 8.4% and other oxides of Al, Si, Ca, Mg, mixed with reducing agent and added. In the reaction stage of adding the reducing agent, the reaction temperature is 1550°C-1600°C, and the time is controlled within 75 minutes. After adding the reducing agent, the temperature of the molten pool is raised to 1620°C-1670°C, and the duration is 50 minutes. After the carbonization reaction reaches the end point, open the slag outlet, flow the titanium carbide slag into the slag pan and cool slowly, and break the titanium carbide slag after cooling for 12 hours. After magnetic separation, a titanium carbide slag product with a titanium carbide content ...

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Abstract

The invention relates to a method for promoting growth of TiC in molten slag and belongs to the field of titanium metal smelting. The method is used for solving the technical problem that subsequent purification and enrichment of the TiC are high in difficulty due to the fact that the TiC prepared from titaniferous furnace slag through carbothermic reduction is relatively small in particle size. The method for promoting growth of the TiC in titanium slag smelting, disclosed by the invention, comprises the steps of adding electric furnace dedusted dust produced during smelting into an electricfurnace during the preparation of titanium carbide slag from titaniferous feedstocks through carbothermic reduction, and carrying out smelting together with the titaniferous feedstocks and a reducer,thereby obtaining the titanium carbide slag. According to the method, the particle size of titanium carbide particles prepared by the method can reach 7 to 30 microns, a titanium carbide product withrelatively high grade can be obtained through wet magnetic separation, the dedusted dust produced during smelting can be effectively recycled, and thus, the environmental pressure is alleviated.

Description

technical field [0001] The invention belongs to the field of titanium metal smelting, and in particular relates to a method for promoting the growth of TiC in molten slag. Background technique [0002] The Panxi area is rich in titanium resources, and a large amount of titanium-containing slag is produced in the process of development and utilization, such as high-titanium blast furnace slag containing TiO 2 20% to 26%, titanium slag electric furnace dust containing TiO 2 20% to 35%, etc. For titanium-containing slag, many domestic research institutions have carried out research on various technical routes for titanium extraction, such as the production of silicon-titanium alloys, the production of slag glass-ceramics, etc., but the processing capacity is limited, and the problem of titanium-containing slag cannot be fundamentally solved. comprehensive utilization issues. At present, titanium-containing slag "high temperature carbonization - low temperature chlorination ...

Claims

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Application Information

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IPC IPC(8): C01B32/921C22B7/04
CPCC01P2004/61C01P2006/80C22B7/001C22B7/04C01B32/921Y02P10/20
Inventor 王东生张溅波赵青娥黄家旭
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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