The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2016
Filed:
Jun. 28, 2012
Byung Moon Moon, Seoul, KR;
Tae U Yu, Seoul, KR;
Dong Ho Park, Gyeonggi-do, KR;
Hyun Jin Koo, Gyeonggi-do, KR;
Gang June Kim, Gyeonggi-do, KR;
Eun Su Jang, Jeonbuk, KR;
Sang Wook Lee, Chungcheongnam-do, KR;
Byung Moon Moon, Seoul, KR;
Tae U Yu, Seoul, KR;
Dong Ho Park, Gyeonggi-do, KR;
Hyun Jin Koo, Gyeonggi-do, KR;
Gang June Kim, Gyeonggi-do, KR;
Eun Su Jang, Jeonbuk, KR;
Sang Wook Lee, Chungcheongnam-do, KR;
KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, Chungcheongnam-do, KR;
Abstract
In order to produce metallurgical grade silicon and solar cell grade polysilicon in batches, a method of the present invention comprises: a step of reduction in an arc furnace, consisting of removing C and CO in a silicon reduction atmosphere using silica stone and carbon black by an arc so as to produce metallurgical grade silicon; a step of refining by slag consisting of removing phosphorus (P) and boron (B) by slag; a step of refining by unidirectional solidification consisting of removing metal impurities (Fe, Al, Ti, Mn, etc.) by means of unidirectional solidification; and a step of steam plasma-electromagnetism continuous refining consisting of charging a furnace with the unidirectionally solidified silicon and removing boron (B) by a steam plasma torch.