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91. 发明授权

US5820842A Silicon refining process 失效
标题翻译：硅精炼工艺
公开(公告)号：US5820842A
公开(公告)日：1998-10-13
申请号：US711599
申请日：1996-09-10
申请人： Jerald Smith , Stephen Johnson , Steven Oxman
发明人： Jerald Smith , Stephen Johnson , Steven Oxman
IPC分类号： C01B33/037 , G05B13/02 , C01B33/02
CPC分类号： C01B33/037 , G05B13/028 , Y10S423/05
摘要： The process calculates the amount of silica and oxidizing agent to use in a refining process for metallurgical-grade silicon. The calculation for silica takes into account (1) the aluminum content of the previous batch of refined silicon; (2) the calcium content of the previous batch of refined silicon; (3) the trend in the aluminum content of the unrefined silicon; and (4) the age of the ladle used for refining. The process then calculates the amount of silica based on a predetermined minimum amount of silica to add, a predetermined maximum amount of silica to add and the amount of silica added to the previous batch of refined silicon. The calculation for oxidizing agent is based on (1) the aluminum content of the previous batch of refilled silicon; (2) the calcium content of the previous batch of refined silicon; and (3) the age of the ladle. The process then calculates the amount of oxidizing agent to add based on a maximum amount of oxidizing agent to add and the amount of oxiziding agent added to the the previous batch of refined silicon. By following this process, an increase in the amount of chemical-grade silicon is obtained.
摘要翻译：该过程计算在冶金级硅的精炼过程中使用的二氧化硅和氧化剂的量。二氧化硅的计算考虑了（1）前一批精炼硅的铝含量; （2）前一批精制硅的钙含量; （3）未精制硅的铝含量趋势; 和（4）用于精炼的钢包的年龄。然后，该过程基于预定的最小二氧化硅添加量计算二氧化硅的量，预定的最大添加量的二氧化硅和添加到前一批精制硅中的二氧化硅的量。氧化剂的计算基于（1）前一批重填硅的铝含量; （2）前一批精制硅的钙含量; 和（3）钢包的年龄。然后，该过程基于添加的最大量的氧化剂和添加到前一批精制硅中的氧化剂的量来计算添加的氧化剂的量。通过跟随该过程，获得了化学级硅的量的增加。

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