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对铜渣进行氢气还原处理,分析了还原温度和时间对还原前后铜渣物相组成和微观形貌的影响,并对还原过程的物相转变进行了讨论.结果表明,铜渣氢气还原产物为金属Fe和玻璃态SiO2,二者的产出量随还原温度升高和还原时间延长而增加,950℃还原6h铜渣中铁还原率比800℃时高47.4%,随反应时间延长铜渣中铁还原率增长速度变慢;原渣中狭长或树突状的铁橄榄石相还原后转变为不规则颗粒状或片状金属Fe相,随还原时间延长和温度升高,颗粒表面变得更加致密;铜渣氢气还原制备金属Fe催化剂时还原温度900～950℃、还原时间3～5h为宜.
The effects of reduction temperature and time on the phase composition and microstructure of the copper slag before and after reduction were analyzed, and the phase transformation of the reduction process was discussed.The results showed that the reduction products of copper slag were The output of both metal Fe and glassy SiO2 increased with the increase of reduction temperature and reduction time. The reduction rate of iron in copper slag at 950 ℃ for 6h was 47.4% higher than that at 800 ℃. With the reaction time extended, Rate of growth slowed down; the narrow slag or dendritic fossil olivine phase reduced to irregular granular or flaky metal Fe phase, with the reduction time and temperature increase, the particle surface becomes more compact; Reduction of copper slag hydrogen metal catalyst prepared when the reduction of 900 ~ 950 ℃, the reduction time of 3 ~ 5h is appropriate.