A kind of preparation method of titanium carbide slag

A titanium carbide and carbonization reaction technology, applied in the field of metallurgy, can solve the problems of difficult magnetic separation and acid leaching, insignificant enrichment effect of titanium carbide, low degree of dissociation of grinding monomers, etc. Residue amount, improve comprehensive utilization rate, good application effect

Active Publication Date: 2019-01-11
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The problem of further purification or enrichment of titanium carbide slag is that the particle size of TiC in this type of titanium carbide slag is small, usually between 0.2-10 μm, and it is dispersed in other impurities, and the degree of dissociation of grinding monomers is relatively small. Low, it brings difficulties to magnetic separation and acid leaching and other processes, the enrichment effect of titanium carbide is not obvious, and the application of titanium carbide slag is also facing challenges

Method used

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preparation example Construction

[0014] The preparation method of titanium carbide slag provided by the present invention, the method comprises carbonization reaction of titanium-containing raw material and reducing agent, and the carbonization reaction is carried out in the presence of a crystal nucleating agent, wherein the crystal nucleating agent is selected from titanium carbide-containing substances and / or ferrous substances.

[0015] In the present invention, the titanium-containing raw material is a material containing titanium dioxide, specifically, it can be selected from blast furnace slag obtained by smelting vanadium-titanium magnetite in a blast furnace, electric furnace melting slag obtained by direct reduction of vanadium-titanium magnetite, and electric furnace smelting titanium One or more of slag dedusting ash and low-grade ilmenite, wherein the content of titanium dioxide is between 15-45% by weight. In the present invention, the carbonization reaction is a reaction in which titanium in th...

Embodiment 1

[0029] The dust-collecting material in the titanium metallurgical production process is used as the titanium-containing raw material, and its TiO 2 The content is 18.68% by weight, and the rest are oxides of iron, calcium, magnesium, silicon, and aluminum. Coke powder is used as a reducing agent, and titanium carbide slag (with a particle size of 10-80 μm) containing about 20% by weight of titanium carbide is used as a crystal nucleating agent. Mix the titanium-containing raw materials, coke powder, and crystal nucleating agent in a weight ratio of 100:18:3.5, and then add them to the electric furnace. Send electricity to raise the temperature to carry out the reduction reaction, and keep the carbonization temperature at 1600°C. After the carbonization reaction for 4 hours, open the slag outlet, flow the titanium carbide slag into the slag pan and cool it naturally to obtain the titanium carbide slag. The cooled titanium carbide slag is crushed and re-selected to obtain a tit...

Embodiment 2

[0031] Blast furnace slag obtained from blast furnace smelting vanadium-titanium magnetite is used as titanium-containing raw material, and its TiO 2The content is 23.27% by weight, and the rest are oxides of iron, calcium, magnesium, silicon, and aluminum. Anthracite is used as a reducing agent, and a 50% by weight mixture of titanium carbide (with a particle size of 10-15 μm) and iron powder (with a particle size of 100-250 μm) is used as a crystal nucleating agent. Add titanium-containing raw materials into the submerged arc furnace, send electricity to heat up to form a molten pool, add anthracite, and add crystal nucleating agent at the same time, the weight ratio of titanium-containing raw materials, anthracite, and crystal nucleating agent is 100:23:1.5, and carry out carbonization reduction reaction. Keep the carbonization temperature at 1800°C. After the carbonization reaction for 2 hours, open the slag outlet, flow the titanium carbide slag into the slag pan and co...

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Abstract

Relating to the field of metallurgy, the invention discloses a preparation method of titanium carbide slag. The method includes: subjecting a titanium-containing raw material and a reducing agent to carbonation reaction in the presence of a nucleating agent, wherein the nucleating agent is selected from a titanium carbide-containing substance and / or an iron-containing substance. The method provided by the invention can make titanium carbide particles in the carbonization reaction gather and grow up, is conducive to further separation and purification for preparation of high-grade titanium carbide slag, achieves efficient utilization of titanium carbide slag, and improves the comprehensive utilization rate of titanium resources.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a preparation method of titanium carbide slag. Background technique [0002] Titanium carbide is widely used in cermets, cutting tools, wear-resistant refractory materials, heat-resistant alloys, hard alloys, aerospace and other fields as additives. The preparation methods of titanium carbide powder include carbothermal reduction method, direct reaction method, gel sol method, etc. At present, the most mature and widely used method is carbothermal reduction method, that is, in submerged arc furnace, tube furnace or vacuum furnace. Titanium dioxide is reduced by carbon black, and titanium carbide is prepared at a high temperature of 1600-1800 °C. [0003] In recent years, on the one hand, in order to reduce the manufacturing cost of titanium carbide, on the other hand, in order to comprehensively utilize titanium minerals and improve resource utilization, many researchers have chosen c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/921
CPCC01P2004/61C01P2006/80
Inventor 赵青娥程晓哲黄家旭王东生王唐林
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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