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Fluidization-chlorination method for carbonized slag

A carbonized slag and fluidization technology, applied in the direction of titanium halide, etc., can solve the problems of chlorination furnace cohesion loss, low chlorination rate, etc., and achieve the effect of improving recovery rate, high recovery rate and obvious economic benefits

Inactive Publication Date: 2018-01-19
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: the chlorination rate of the existing carbonized slag chlorination process is low, and it is easy to cause the technical problem of cohesion loss in the chlorination furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 carries out fluidized chlorination to carbide slag with the method of the present invention

[0031] The carbide slag with a particle size of 80-800 mesh is sent into a fast fluidized bed with an aspect ratio of 20:1, and reacts with chlorine gas under fluidization, and the reaction temperature is controlled at 650°C.

[0032] Using the above rapid fluidized chlorination process of carbide slag, the rapid chlorination reaction of carbide slag can be realized. The whole pyrolysis process is controlled within 10 minutes, and the excess heat is quickly taken out while the rapid chlorination of titanium carbide is completed. The chlorination furnace There will be no local high temperature inside, and there will be no substances that cause the phenomenon of bond loss. Moreover, the fluidization speed is fast, the exposed area of ​​titanium carbide is increased, and its utilization rate is improved. The utilization rate can reach more than 90%, and the recovery r...

Embodiment 2

[0033] Embodiment 2 carries out fluidized chlorination to carbide slag with the method of the present invention

[0034] Carbide slag with a particle size of 80-800 mesh is sent into a fast fluidized bed with an aspect ratio of 20:1, and reacts with chlorine gas under fluidization, and the furnace temperature is controlled at 650°C.

[0035] Using the above rapid fluidized chlorination process of carbide slag, the rapid chlorination reaction of carbide slag can be realized. The whole pyrolysis process is controlled within 5 minutes, and the excess heat is quickly taken out while the rapid chlorination of titanium carbide is completed. The chlorination furnace There will be no local high temperature inside, and there will be no substances that cause the phenomenon of bond loss. And the fluidization speed is fast, the exposed area of ​​titanium carbide is increased, and its utilization rate is improved, the utilization rate can reach 85%, and the recovery rate of chlorine gas is...

Embodiment 3

[0036] Embodiment 3 carries out fluidized chlorination to carbide slag with the method of the present invention

[0037] Carbide slag with a particle size of 80-800 mesh is fed into a fast fluidized bed with an aspect ratio of 20:1, and reacts with chlorine gas under fluidization, and the furnace temperature is controlled at 400°C.

[0038] Using the above rapid fluidized chlorination process of carbide slag, the rapid chlorination reaction of carbide slag can be realized. The whole pyrolysis process is controlled within 5 minutes, and the excess heat is quickly taken out while the rapid chlorination of titanium carbide is completed. The chlorination furnace There will be no local high temperature inside, and there will be no substances that cause the phenomenon of bond loss. And the fluidization speed is fast, the exposed area of ​​titanium carbide is increased, and its utilization rate is improved, the utilization rate can reach 70%, and the recovery rate of chlorine gas is ...

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Abstract

The invention belongs to the technical field of metallurgy and chemical industry and particularly relates to a fluidization-chlorination method for carbonized slag. According to the fluidization-chlorination method, the technical problems that the chlorination rate of an existing carbonized slag chlorination process is low, and the cementation and defluidization of a chlorination furnace are easily caused are solved. The fluidization-chlorination method comprises the following steps: (a) putting carbonized slag particles into a fluidized bed, and introducing chlorine gas for chlorination, wherein the chlorination temperature is 400-650 DEG C, and the chlorination time is 1-10 minutes; and (b) carrying out drip-washing on a mixture obtained in the step (a) by virtue of a titanium tetrachloride drip-washing system, cooling, and separating, so as to obtain the chlorination gas and liquid-state titanium tetrachloride. By chlorinating the carbonized slag by virtue of a rapid fluidized bed,the heat and mass transfer speeds are high, the chlorination speed is high, the problems of cementation and defluidization of the fluidized bed can be effectively avoided, meanwhile, the chlorine gasand the carbonized slag can be recycled, and the production cost is saved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and chemical industry, and in particular relates to a fluidized chlorination method of carbide slag. Background technique [0002] my country is the country with the richest titanium resources in the world, and the proven reserves of titanium ore account for 48% of the world's total. my country's titanium resources are mainly vanadium-titanium magnetite in the Panxi area, but this ilmenite is a typical complex multi-element rock ore, and its TiO 2 The grade is low, and its impurity content of calcium and magnesium is high, reaching 7-11%. The high-calcium-magnesium-high-titanium blast furnace slag produced after the smelting of this vanadium-titanium magnetite cannot be used in the existing sieve-plate boiling chlorination furnace. Chlorination process. [0003] For this special titanium mineral, the process route of "high-temperature carbonization of blast furnace slag-low-temperature select...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/02
Inventor 周丽张溅波尹国亮王建鑫黄富勤
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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