Production Of Slag For Silicon Refining Molten Sog Solar

Production of Solar Grade (SoG) Silicon by Refining Liquid

Production of Solar Grade (SoG) Silicon by Refining Liquid Metallurgical Grade (MG) Silicon ABSTRACT Pyro-metallurgical refining techniques are being developed for use with molten metallurgical grade (MG) silicon so that directionally solidified refined MG silicon can be used as solar grade (SoG) silicon feedstock for photovoltaic applications

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Production of Solar Grade (SoG) Silicon by Refining Liquid

Production of Solar Grade (SoG) Silicon by Refining Liquid Metallurgical Grade (MG) Silicon Table of Contents Page No. Table of Contents i List of Figures and Tables ii ABSTRACT iv 1. INTRODUCTION 1 2. BACKGROUND 3 3. OUTLINE OF CURRENT PROGRAM 5 4. MG SILICON FEEDSTOCK 6 5. REFINING OF MG SILICON IN MOLTEN STATE 8 6.

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Production of Solar Grade (SoG) Silicon by Refining Liquid

2001-08-06· @article{osti_786367, title = {Production of Solar Grade (SoG) Silicon by Refining Liquid Metallurgical Grade (MG) Silicon: Final Report, 19 April 2001}, author = {Khattak, C. P. and Joyce, D. B. and Schmid, F.}, abstractNote = {This report summarizes the results of the developed technology for producing SoG silicon by upgrading MG silicon with a cost goal of $20/kg in large-scale production.

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(PDF) Production of Solar Grade (SoG) Silicon by Refining

Production of Solar Grade (SoG) Silicon by Refining Liquid Metallurgical Grade (MG) Silicon: Final Report, 19 April 2001 Article (PDF Available) ·

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Slag refining of silicon and silicon alloys : a review

In order to optimize the B removal during slag-refining process for solar-grade silicon production, a new process for the removal of B in molten Si was proposed based on the principle of oxidized

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Production of Solar Grade (SoG) Silicon by Refining Liquid

Production of Solar Grade (SoG) Silicon by Refining Liquid Metallurgical Grade (MG) Silicon Final Report April 19, 2001 C.P. Khattak, D.B. Joyce, and F. Schmid Crystal Systems, Inc. Salem, Massachusetts NREL Technical Monitor: Martha Symko-Davies Prepared under Subcontract No. ZAX-8-17647-13

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Production of Solar Grade (SoG) Silicon by Refining Liquid

Production of Solar Grade (SoG) Silicon by Refining Liquid Metallurgical Grade (MG) Silicon Final Report April 19, 2001 C.P. Khattak, D.B. Joyce, and F. Schmid Crystal Systems, Inc. Salem, Massachusetts NREL Technical Monitor: Martha Symko-Davies Prepared under Subcontract No. ZAX-8

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Production of solar grade (SoG) silicon by refining liquid

Production of solar grade (SoG) silicon by refining liquid metallurgical grade (MG) silicon: Annual Report: June 10 1998--October 19, 1999

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(PDF) Production of solar-grade silicon by refining of

Production of solar-grade silicon by refining of liquid metallurgical-grade silicon . Article (PDF Available) · March 1999 with 114 Reads How we measure 'reads' A 'read' is counted each time

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Production of solar grade (SoG) silicon by refining liquid

Pyro-metallurgical refining techniques are being developed for use with molten metallurgical-grade (MG) silicon so that directionally solidified refined MG silicon can be used as solar-grade (SoG) silicon feedstock for photovoltaic applications. The most problematic impurity elements are B and P because of their high segregation coefficients.

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Distribution of impurity elements in slag–silicon

The partitioning of the impurity elements between molten silicon and slag was examined in terms of basicity and oxygen potential of the slag, with particular focus on the behaviour of boron and phosphorus. The experimental results showed that both of these aspects of slag chemistry have a significant influence on the distribution coefficient of B and P. Increasing the oxygen potential by

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Study of boron removal from molten silicon by slag

Solar energy is expected to be in great demand within the next few years. In relation to this, a global shortage in the solar-grade silicon (SoG-Si) used in the production of sola

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Recovery and purification of metallic silicon from waste

2019-08-20· The waste silicon slag is a by-product of the industrial silicon production, which is mainly produced during the secondary refining of silicon in ladle and more than 15% of metallic silicon was mixed in it. A large amount of silicon slag is accumulated in the factory or used to pave the way, which causes the waste of metallic silicon in slag. Silicon recycling has always been a concern and it

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Silicon processing: from quartz to crystalline silicon

The value chain for the production of crystalline silicon solar cells has been reviewed. The primary processing steps for the production of silicon solar cells from quartz are as follows: bulk production of metallurgical-grade silicon via carbothermic reduction in a submerged furnace, refining of

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Processes for Upgrading Metallurgical Grade Silicon to

Slag refining Slag refining technique is a process candidate for mainly B removal in which the boron impurity in molten silicon is oxidized and removed by a molten silicate slag. The related chemical reaction can be written as: [B] Si + SiO 2 = (B 2 O 3 ) + Si (8) The thermodynamics of B removal by silicate slags has been studied through several works and the distribution coefficient of B

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Thermodynamics of solar-grade-silicon refining ScienceDirect

In the present paper, the purification process for the solar grade silicon SOG-Si of which the required purity is 7 N, and the thermodynamic considerations and evaluation of the refining process are discussed. Additionally, the refining process for SOG-Si production was evaluated. Finally, the low-cost overall process for producing SOG-Si was

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Electrochemical Slag-Metal Reaction for Silicon Production

alternative raw material for refining of MG-silicon to produce SOG-Si. The slag treatment on MG-Si for SOG-Si production is based on the principle of liquid-liquid extraction in steel industry. The slag used for the extraction of impurities must dissolve individual impurities better than molten silicon does, the solubility of silicon in the

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Distribution of impurity elements in slag silicon

1 Distribution of Impurity Elements in Slag-Silicon Equilibria for Oxidative Refining of Metallurgical Silicon for Solar Cell Applications M.D. Johnstona* aand M. Barati aDepartment of Materials Science and Engineering, The University of Toronto, 184 College Street, Toronto, ON, Canada, M5S3E4

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Study of boron removal from molten silicon by slag

Solar energy is expected to be in great demand within the next few years. In relation to this, a global shortage in the solar-grade silicon (SoG-Si) used in the production of solar cells has motivated numerous studies on metallurgical-grade Si (MG-Si) refining.

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Production of Solar Grade (SoG) Silicon by Refining Liquid

This report summarizes the results of the developed technology for producing SoG silicon by upgrading MG silicon with a cost goal of $20/kg in large-scale production. A Heat Excha

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Production of solar grade (SoG) silicon by refining liquid

Pyro-metallurgical refining techniques are being developed for use with molten metallurgical-grade (MG) silicon so that directionally solidified refined MG silicon can be used as solar-grade (SoG) silicon feedstock for photovoltaic applications. The most problematic impurity elements are B and P because of their high segregation coefficients.

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Production of solar grade (SoG) silicon by refining liquid

This report summarizes the results of the developed technology for producing SoG silicon by upgrading MG silicon with a cost goal of$20/kg in large-scale production. A Heat Exchanger Method (HEM) furnace originally designed to produce multicrystalline ingots was modified to refine molten MG silicon feedstock prior to directional solidification

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Thermodynamics on SOG-Si Refining Processes

Thermodynamics on SOG-Si Refining Processes Institute of Industrial Science, Treatment ・Thermodynamics and Processing on Solar Grade Silicon (SOG-Si) Production Materials Production and Recycling Engineering Lab. (Formerly Ferrous Metallurgy Lab.) 3 Contents 1. Introduction 2. Metallurgical refining for SOG-Si Thermodynamic properties of impurities in molten

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Production of Solar Grade (SoG) Silicon by Refining Liquid

Production of Solar Grade (SoG) Silicon by Refining Liquid Metallurgical Grade (MG) Silicon: Final Report, 19 April 2001 . By C. P. Khattak, D. B. Joyce and F. Schmid. Cite . BibTex; Full citation; Abstract. This report summarizes the results of the developed technology for producing SoG silicon by upgrading MG silicon with a cost goal of $20/kg in large-scale production

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Development Of Solar Grade Silicon Refining Via

His reported thermodynamic data on impurities in molten silicon has clarified the validity of new metallurgical processes for solar grade silicon refining. In addition, he and his students pursued innovative processes for more effective silicon refining via new principle, one of which is widely known as a solvent refining process with a

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Development of Solar Grade (SoG) Silicon (Technical Report

The rapid growth of the photovoltaics (PV) industry is threatened by the ongoing shortage of suitable solar grade (SoG) silicon. Until 2004, the PV industry relied on the off spec polysilicon from the electronics industry for feedstock. The rapid growth of PV meant that the demand for SoG silicon

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