为给高纯硅的制备提供一种高纯原料,详细研究了石油焦粉的酸浸除杂、超声酸浸除杂、真空高温除杂,考察了石油焦粉粒度、盐酸浓度、酸浸时间、酸浸温度、酸浸液固比和搅拌对除杂效果的影响.得到的最佳工艺条件为：石焦粉颗粒控制在150μm以下,盐酸质量分数5%,反应时间6 h,水浴温度70℃,浸出液固比10∶1,搅拌速度40 r/min.在此工艺条件下,石油焦粉中金属元素杂质的去除率可高达94.69%,非金属元素杂质的去除率达39.95%.实验同时探讨了超声场作用下酸洗时间对杂质去除效果的影响,以及在真空高温焙烧条件下杂质的去除效果,最终金属元素杂质和非金属元素杂质的去除率分别达到了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.
参考文献
| [1] | Braga AFB;Moreira SP;Zampieri PR;Bacchin JMG;Mei PR .New processes for the production of solar-grade polycrystalline[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,2008(4):418-424. |
| [2] | Bruton TM. .General trends about photovoltaics based on crystalline silicon[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,2002(1/4):3-10. |
| [3] | 邢鹏飞,赵培余,郭菁,刘燕,李峰,涂赣峰.太阳能级多晶硅切割废料浆的综合回收[J].材料导报,2011(01):75-79. |
| [4] | Youqing Wu;Shiyong Wu;Jing Gu .Differences in physical properties and CO2 gasification reactivity between coal char and petroleum coke[J].Transactions of The Institution of Chemical Engineers. Process Safety and Environmental Protection, Part B,2009(5):323-330. |
| [5] | 庞爱锁,潘淼,郭生士,吴正云,陈朝.金属硅的酸洗和氧化提纯[J].厦门大学学报（自然科学版）,2009(04):543-546. |
| [6] | 马晓东,张剑,吴亚萍,李廷举.超声场湿法提纯冶金级硅的研究[J].功能材料,2008(07):1071-1073. |
| [7] | 邴文彬,王平,李辽沙.超声波酸浸除铁提纯硅微粉实验研究[J].化工矿物与加工,2009(07):12-14. |
| [8] | 戴永年,杨斌,马文会,陈为亮,代建清.有色金属真空冶金进展[J].昆明理工大学学报(理工版),2004(04):1-4. |
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