Remove of impurity of petrol coke during preparing high purity silicon by metallurgical method
Remove of impurity of petrol coke during preparing high purity silicon by metallurgical method
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DOI：
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发表时间：
2012
影响因子：
1.8
通讯作者：
G. Jing
中科院分区：
文献类型：
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作者：
G. Jing
为了给高纯硅的制备提供高纯原料，本文采用酸浸、超声波场净化和真空加热净化三种方法对石油焦进行了除杂研究，结果表明：酸浸的最佳工艺参数为：石油焦粒度小于150 μm;最佳工艺条件为：盐酸质量分数5%、反应时间6 h、温度70 ℃、液固比10∶ 1、搅拌速度40 r/min，在此条件下，石油焦粉中金属杂质的去除率可达94.69%，非金属杂质的去除率可达39.95%，同时考察了超声波场和真空高温焙烧对酸浸净化效果的影响，结果表明，石油焦粉中金属杂质和非金属杂质的去除率分别达到99.55%和99.23%。
To provide a high purity raw materials for preparing high purity silicon,the removal of impurity of petrol coke is studied in this paper by acid leaching,ultrasonic field purification and vacuum heating purification.The optimal parameters of acid leaching are as follows:the size of petroleum coke particles below 150 μm;hydrochloric acid of 5wt%,reaction time of 6h,temperature of 70 ℃,the ratio of leaching liquid to solid of 10∶ 1 and stirring speed of 40 r/min,under which up to 94.69wt% metallic in petrol coke powder and 39.95% non-metallic can be removed.At the same time,the effects of ultrasonic field and high-temperature roasting in vacuum on the results of purification by acid leaching are investigated.As a result,the elimination of metallic and non-metallic impurities reached 99.55% and 99.23% respectively.