Online dechlorination technology of chlorination process tailing slag extracted titanium

A technology for removing titanium tailings and chlorination, which is applied in the field of metallurgy to achieve the effect of reducing solid waste discharge

Inactive Publication Date: 2016-01-27
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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AI Technical Summary

Problems solved by technology

[0003] At present, there is no relevant report on the on-line dechlorination process of titanium tailings by chlorination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The titanium extraction tailings after "high-temperature carbonization-low-temperature chlorination" of Panzhihua Iron and Steel Co., Ltd. are used as raw materials for online dechlorination treatment.

[0023] The content of chloride ion in titanium extraction tailings is between 2.0% and 4.07%. The specific chlorine removal method is as follows:

[0024] The temperature of titanium extraction tailings is between 400 and 550 ° C. After the tailings are discharged from the furnace, they enter the beating tank. Water needs to be stored in the tank all the time. Water is added during the slag discharge process to make the water-slag ratio 3.2:1. The stirring paddle in the beating tank The speed is 380r / min;

[0025] Use a mortar pump to transport the slurry to the slag yard, and the transport distance of one pump shall not exceed 100m;

[0026] The slurry settles naturally in the slag yard. The slag yard adopts the trapezoidal cofferdam method, and the tailings are trans...

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PUM

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Abstract

The invention discloses a processing technology of chlorination process tailing slag extracted titanium and belongs to the metallurgical field. The invention provides an online dechlorination technology of chlorination process tailing slag extracted titanium. The technology includes the following steps that firstly, the chlorination process tailing slag extracted titanium enters a beating tank through a slag discharge port of a chlorination furnace, and the temperature of the chlorination process tailing slag extracted titanium is 400-550 DEG C; secondly, the chlorination process tailing slag extracted titanium and water in the beating tank are stirred and beaten for form sizing agents, and the mass ratio of the water to the slag in the sizing agents is controlled to be 3.2-4:1; thirdly, by means of a slurry pump, the sizing agents are conveyed to a slag yard through a pipeline, and therefore integration of dechlorination and tailings conveying can be achieved; fourthly, the beaten tailing slag extracted titanium naturally settles in the slag yard till the water content of tailings is 12-20% and the chlorine ion content is lower than 0.3%; fifthly, the tailings where natural settlement is performed directly enter a rotary kiln through a belt and are calcinated for 20-40 min at the temperature of 600-700 DEG C. By means of the online dechlorination technology, the chlorine ion content of the chlorination process tailing slag extracted titanium is smaller than or equal to 0.08%.

Description

technical field [0001] The invention relates to a treatment process for extracting titanium tailings by a chlorination method, and belongs to the field of metallurgy. Background technique [0002] Panzhihua Iron and Steel adopts the process of smelting vanadium-titanium magnetite in ordinary blast furnace, which realizes the large-scale economical smelting of vanadium-titanium magnetite. 2 Along with the iron concentrate into the blast furnace slag, TiO is formed 2 High-titanium blast furnace slag with a content of 21% to 25%. Through the "high temperature carbonization - low temperature chlorination" process, Panzhihua Iron and Steel Co., Ltd. can make TiO2 containing titanium blast furnace slag 2 TiCl 4 Extracted in the form of titanium dioxide as a raw material for sponge titanium or titanium dioxide chloride. The tailings of blast furnace slag after titanium extraction are called titanium extraction tailings. Because the titanium extraction tailings contain a large ...

Claims

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Application Information

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IPC IPC(8): C04B18/14
CPCY02W30/91
Inventor 王云王建鑫杨仰军陆平张苏新黄富勤
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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