production of slag for silin refining molten sog solar

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production of slag for silin refining molten sog solar

production of slag for silin 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 ...

  • 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.

  • 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. EXPERIMENTAL SETUP 13 7 ...

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

    2001-04-19  Production of Solar Grade (SoG) Silicon by Refining Liquid Metallurgical Grade (MG) Silicon: Final Report, 19 April 2001 Article (PDF Available) August 2001

  • 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

  • Production of solar grade (SoG) silicon by refining liquid ...

    2019-10-04  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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  • An Evolving Method for Solar-Grade Silicon Production ...

    In order to develop a low-cost metallurgical route for solar grade silicon (SOG-Si) production, a novel process sequence of slag treatment and solidification refining using Si-Sn solvents under ...

  • Production of Solar Grade (SoG) Silicon by Refining

    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

  • 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.

  • 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

  • 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 ...

  • 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 ...

  • 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 ...

  • 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

  • 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 ...

  • 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

  • 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

  • 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 . 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. A Heat Exchanger ...

  • REMOVING BORON FROM METALLURGICAL GRADE SILICON

    volatility compared to silicon [7]. The molten slag refining is a traditional method using in the purification of steel making [8]and it was also proved that the molten slag refining based on calcium sillicate system is an efficient agent of removing boron from molten metallurgical grade silicon

  • 发布位置:Journal of Mining and Metallurgy, Section B 2014作者:J J Wu M Xu K Liu W H Ma B Yang Y N Dai关于:Base Molten slag Boron Partition coefficient
  • 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

  • Solar Grade Silicon Refining and Silicide Production ...

    Solar Grade Silicon Refining and Silicide Production Processes Boron Removal Process from Molten Silicon Using Ammonia Gas The process of upgrading silicon from metallurgical grade to solar grade has great potential for reducing the price of silicon supply in the photovoltaic industry.

  • Kinetics of Silicon Refining using Slag Treatment

    solar-grade silicon (SOG-Si) (99.9999% Si). Many researchers have reported that relatively inexpensive metallurgical grade silicon (MG-Si) (98-99% Si) can be used as an alternative raw material. Of all the impurities present in MG-Si, boron and phosphorus are usually the most difficult to remove. Slag refining is one of the few metallurgical methods for the efficient removal of boron from ...

  • Advances in Materials Science and Engineering

    Removal methods of impurity from metallurgical-grade silicon (Si) are intensively studied to produce solar-grade silicon (SoG-Si) with a smaller economical load and lower cost. Removal of phosphorus (P) has been an important issue because of difficulties in application of conventional metallurgical methods such as solidification refining.

  • 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 ...

  • Preparation of Solar Grade Silicon Precursor by Silicon ...

    Abstract. Al-Si alloy, a precursor of solar grade silicon, was prepared by direct electrolysis in cryolite molten salt at 950 °C using high purity silica as material, liquid aluminum as the cathode and high purity graphite as the anode.

  • Study on the Preparation of Solar Grade Silicon by ...

    However, it needs a very large initial investment using plasma equipment. Slag refining is very effective method for the removal of boron from molten silicon. The technical viability of the slag refining process has been demonstrated by many researches, but all of them were based on laboratory scale, static theoretical research. Meanwhile ...

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