常压碳热还原含铟渣中三氧化二铟的动力学

来源期刊:中国有色金属学报2016年第6期

论文作者:谢富春 尹周澜 丁治英 谭军 刘常青 张平民

文章页码:1350 - 1356

关键词:碳热还原;含铟渣;动力学;铟;熔池熔炼

Key words:carbon thermoreduction; indium oxide slag; kinetics; indium; bath smelting

摘    要:在常压下研究碳热还原氧化铟的动力学。结果表明:增大碳与含铟渣的质量比或提高反应温度,铟还原率增大。当反应温度为1523 K,碳与含铟渣质量比为0.5、反应时间为60 min时,含铟渣铟的还原挥发率达到 85.21%;在常压下,碳与含铟渣质量比达到0.5,含铟渣平均粒度是80 μm,石墨颗粒平均度约为30 μm,反应温度在1373~ 1523 K区间内,碳热还原含铟渣的还原挥发速率由界面化学反应所控制,其表观活化能为168.67 kJ/mol。

Abstract: The kinetics of atmospheric carbothermic reduction of indium oxide slag was investigated. The results indicate that the reduction volatilization ratio of indium increases with the quality ratio of mass ratio of C and slag containing In or the reaction temperature increasing, the highest indium reduction 85.21% was realized under the condition of the mass ratio of C and slag containing In of 0.5 at 1523 K after 60 min. The interface reaction is the controlling step of the overall reduction process and the activation energy is estimated to be 168.67 kJ/mol when the mass ratio of C and slag containing In is o.5, the average size of slag is 80 μm, the average size of graphite is 30 μm and the reaction temperature is from 1273 to 1523 K.

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