Reduction and carbonization method for titanium-containing raw material

A technology of titanium raw materials and reducing agents, applied in the field of metallurgy, can solve hidden dangers in production safety, affect continuous production, and solve problems such as furnace bottom rise and effective control of foam slag, so as to reduce power consumption and production costs, and ensure safe production operations , the effect of broad application prospects

Inactive Publication Date: 2008-04-30
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

During the reduction carbonization process of titanium-containing raw materials, the bottom of the electric furnace continues to rise, accompanied by severe foamy slag, which seriously affects the reduction carbonization process, reduces the furnace capacity utilization factor and reduction carbonization efficiency, and increases the reduction carbonization power consumption and production costs. , but also cause hidden dangers in production safety, affecting continuous production
[0003] Patent application number 87107488.5 "Method for producing titanium tetrachloride from titanium-containing blast furnace slag", which discloses the technical route of titanium-containing blast furnace slag smelting reduction carbonization, and selectively smelting, reducing and carbonizing titanium-containing blast furnace slag with carbon, Titanium tetrachloride is produced by low-temperature chlorination, but no method is proposed to solve the rise of the furnace bottom during the reduction carbonization process of titanium-containing blast furnace slag and to effectively control foamy slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Titanium-containing blast furnace slag 400kg, TiO 2 The content is 20.95%-21.98%, crushed to a particle size below 31.5mm; anthracite is 55kg, the fixed carbon content is 79.1%, and the particle size range is 0.074-20mm. Mix evenly and add to the 250kVA submerged arc furnace, the height difference of the submerged arc furnace bottom is 25mm; feed in batches, the input power of the material melting period is 275kVA, and the duration is 40min; the input power of the carbonization period is 150kVA, and the duration is 40min to 50min; 250kVA, last until the end of the furnace. Continuous smelting 3 heats, TiO 2 The average carbonization rate is 91.1%, the average fluctuation of furnace bottom height is 2.7mm, and the height coefficient of foamy slag (the ratio of the highest height of slag surface when foamy slag is generated to the height of molten pool slag surface without foamy slag) is 1.45.

Embodiment 2

[0022] Titanium-containing blast furnace slag 2200kg, TiO 2 The content is 20.95%-21.98%, crushed to a particle size below 31.5mm; anthracite is 518kg, the fixed carbon content is 79.1%, and the particle size range is 0.074-20mm. Mix evenly and add to the 2250kVA electric furnace, the electric furnace can rotate 42 degrees, and the masonry slope of the slag outlet is 35-40 degrees. The material is evenly added in three times, the feeding time is 55min~60min, the input power is 2000kVA during the material melting period; the carbonization reaction lasts for 200min, the input power during the carbonization period is 1000kVA, and the input power during the furnace is 1800kVA. Continuous smelting 5 heats, TiO 2 The average carbonization rate is 94.5%, the average fluctuation of furnace bottom height is 20mm, and the height coefficient of foamy slag (the ratio of the highest height of slag surface when foamy slag is generated to the height of molten pool slag surface without foamy...

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Abstract

The invention relates to a reduction carbonization method of the titanium-bearing material, which belongs to the metallurgy field. The invention solves the technology difficult problem that the bottom of a furnace rises and the generated foamed slag is excessive during the reduction carbonization process of the titanium-bearing material. The reduction carbonization method of the titanium-bearing material in the invention has various power distribution systems in the various implementation stages of material melting, reduction carbonization, and discharging; during the material melting stage, the transformer capacity is fully exerted, to ensure that the material is melted quickly; during the reduction carbonization stage, the electric furnace power is controlled to ensure that the depth of a steady foamed slag layer does not exceed 50 percent of the depth of a material melting tank; during the discharging stage, the electric furnace power is enhanced, to ensure that the melted and carbonized slag flow out of an electric furnace steadily, and the power cannot be shut off during the discharging. The reduction carbonization method of the titanium-bearing material of the invention can realize continuous production, the production operation is secure, the reduction carbonization power consumption and the production cost are reduced, the production efficiency is enhanced, and the invention has broad application prospect.

Description

technical field [0001] The invention relates to a reduction carbonization method of titanium-containing raw materials, which belongs to the field of metallurgy. Background technique [0002] Reductive carbonization of titanium-containing raw materials is a key process step for extracting titanium from low-quality titanium raw materials. The products of reduction carbonization can be directly used as raw materials for low-temperature boiling chlorination. It is of great significance for the comprehensive utilization of titanium-containing wastes and the realization of comprehensive utilization of resources. . During the reduction carbonization process of titanium-containing raw materials, the bottom of the electric furnace continues to rise, accompanied by severe foamy slag, which seriously affects the reduction carbonization process, reduces the furnace capacity utilization factor and reduction carbonization efficiency, and increases the reduction carbonization power consump...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12C22B5/10
Inventor 周玉昌廖荣华张继东陈德明
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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