Boron removal from metallurgical grade silicon using a FeCl2 molten salt refining technique-Reference-Cited by-同舟云学术

Boron removal from metallurgical grade silicon using a FeCl2 molten salt refining technique

Published:2013 Issue:3 Volume:49 Page:257-261
ISSN:1450-5339
Container-title:Journal of Mining and Metallurgy, Section B: Metallurgy
language:en
Short-container-title:J min metall B Metall

Author:

Jia B.J.¹,Wu J.J.¹,Ma W.H.¹,Yang B.²,Liu D.C.²,Dai Y.N.¹

Affiliation:

1. Kunming University of Science and Technology, The national Engineering Laboratory for vacuum metallurgy, Kunming, China + Kunming University of Science and Technology, Engineering Research Center for Silicon Metallurgy and Silicon Materials of Yunnan Prov

2. Kunming University of Science and Technology, The national Engineering Laboratory for vacuum metallurgy, Kunming, China

Abstract

The slag refining for boron removal from metallurgical grade silicon is a promising metallurgical process for producing solar grade silicon. In this paper, FeCl2 molten salt has been used as a new refining agent to remove boron from MG-Si. The effects of refining time and mass ratio of MG-Si to FeCl2 molten salt on boron removal have been investigated in detail. The results showed that boron can be efficiently removed in form of BCl3 and boron concentration in MG-Si was successfully reduced from 22?10-6 to 4?10-6 at 1823K for 2 h with the mass ratio of FeCl2 molten salt to MG-Si for 1.0. The rate equation of boron removal using FeCl2 molten salt was proposed and established in kinetic, which showed a large difference in removal limitation of boron compared with thermodynamics.

Publisher

National Library of Serbia

Subject

Materials Chemistry,Metals and Alloys,Mechanics of Materials,Geotechnical Engineering and Engineering Geology

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