Experiments on Reduction of Molten Titanium Slag by Pulverized Coal Injection
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摘要: 为解决短流程钛渣提纯过程钛渣品位达不到要求的问题,在实验室条件下模拟熔分电炉熔化钛渣,向熔融态的钛渣中喷入煤粉以提高钛渣的品位,研究了喷煤量和喷煤反应时间对熔融钛渣品位的影响。结果表明,随着喷煤量的增加,钛渣二氧化钛品位提高;而随着喷煤时间增加,钛渣二氧化钛的品位先提高后降低。向温度1 600℃的50 kg熔融钛渣中喷入7 kg煤粉,持续喷吹20 min,再反应20 min后,钛渣二氧化钛品位从70%上升到了82%。这一结果将为短流程钛渣提纯提供一个新的途径。Abstract: The grade of titanium slag may not meet the requirement in some short processes of titanium slag smelting.In order to solve the problem,a simulating experimental device of electric furnace was built under laboratory conditions to melt titanium slag,and pulverized coal was injected to the molten slag to improve its grade.The effect of coal injection amount and reaction time on titanium slag's grade was also investigated.Results show that the grade of titanium slag rises with the increase of the coal injection amount,and as the coal is injected,the grade of titanium slag rises before it falls.To be more specific, the grade of titanium slag rises from 70% to 82% after 7 kg of pulverized coal has been injected into 50 kg of molten slag at 1 600℃ for 20 minutes and reacted for another 20 minutes.This conclusion will provide a new way to improve the grade of titanium slag which is smelted by short processes.
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Key words:
- titanium slag /
- coal injection /
- titanium dioxide /
- direct reduction
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