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Production of Solar Grade SoG Silicon by Refining Liquid ,

Aug 06, 2001 0183 32 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 ,...

Evaporation Removal of Boron from Metallurgical

Feb 13, 2014 0183 32 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 chlorination and evaporation B can be generated and evaporated in the form of B-containing gas on the basis of calculated vapor pressures of forming species in the BO15 ,...

Process for the Production of Commercial Grade Silicon ,

Dec 18, 2017 0183 32 High purity silicon scrap from solar silicon crystallization process was added into the slag, which melted rapidly The silicon slag mass ratio was 1 5 The scrap contained around 02 ppm P The melt molten slag and silicon on top was held for around 1 hour at 1600 176 C, and then it was cooled down to the room temperature...

Development of solar grade silicon refining via ,

As a new promising route for solar grade silicon SOG-Si production, metallurgical refining processes was developed in the early eighties of the last century, followed by the establishment of NEDO-JFE process in the beginning of the 2000s, where P was removed by electron beam EB in vacuum conditions and B by Ar-H2O plasma...

Thermodynamics of solar

Jan 01, 2003 0183 32 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 ....

Evaporation Removal of Boron from Metallurgical

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 chlorination and evaporation B can be generated and evaporated in the form of B-containing gas on the basis of calculated vapor pressures of forming species in the ,...

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 ,...

The price and use of silicon slag

Silicon slag is the residue left after the refining of silicon ore, which also contains a lot of silicon contentThe use of silicon slag is also more extensive The use of silicon slag is mainly can be used as deoxidizer and refining the industrial silicon in the silicon slagSilicon slag is a star in the field of deoxidizing...

Solar Silicon Processes

31 Introduction Studies and developments of processes which could be used to convert metallurgical grade MG -silicon or any kind of impure silicon in a solar grade SoG feedstock started early in the 1980s in the United States, Europe, and Japan with almost common objectives and strategies The main aim was to demonstrate that physical, chemical, and metallurgical ,...

Production of low

May 24, 2002 0183 32 When the refining process is followed by directional solidification, it can be used for upgrading metallurgical grade MG silicon to produce solar grade SoG silicon For the long term, total processing in an MG silicon production plant can result in ,...

The price and use of silicon slag

The price of silicon slag is relatively low compared with other ferroalloy products, but it has a wide range of us Silicon slag is the residue left after the refining of silicon ore, which also contains a lot of silicon contentThe use of silicon slag is also more extensive...

Solar Grade Silicon Refining and Silicide Production ,

Titanium silicide Ti 5 Si 3 is a promising new material for very-high-temperature structural applicationsWe propose a pyro-metallurgical method to synthesize Ti 5 Si 3 from titanium bearing slag and molten silicon at high temperature for reducing the production cost and elevating the quality of it Thermodynamic properties of titanium bearing slag and kinetics of the process ,...

Kinetics of Silicon Refining using Slag Treatment

Slag/Silicon mass ratio=25 14 x 10-6 Mass transport in slag The kinetics of boron removal from liquid silicon during slag refining have been investigated in this research by means of several small-scale experimental studies at temperatures of 14500C to 16500C Slag and silicon, in batch weights of 7 g, were heated together in an...

Low Temperature Molten Salt Production of Silicon ,

COMMUNICATION 1 Low Temperature Molten Salt Production of Silicon Nanowires by Electrochemical Reduction of CaSiO3 Dong1,2, Tyler Slade1, Matthew J Stolt1, Linsen Li1, Steven N Girard1, 3, Liqiang Mai2 Song Jin1 Abstract Silicon is an extremely important technological material....

The price and use of silicon slag

The price of silicon slag is relatively low compared with other ferroalloy products, but it has a wide range of us Silicon slag is the residue left after the refining of silicon ore, which also contains a lot of silicon contentThe use of silicon slag is also more extensive The use of silicon slag is mainly can be used as deoxidizer and ....

Removal of Boron and Phosphorus from Silicon Using CaO ,

In recent years considerable research has been conducted on refining of metallurgical grade silicon MG-Si, purity gt 96 to solar grade silicon SoG-Si , with the ultimate goal of reducing the production cost Metallurgical refining routes have drawn the most attention due to the low operational cost The reduction of the impurities in silicon to a...

PDF Production of Solar Grade SoG Silicon by Refining ,

For the future, this approach, when used in an MG silicon production plant, will produce SoG silicon for 762/kg, which is less than the goal of 20/kg ,...

Production of Solar Grade SoG Silicon by Refining Liquid ,

Aug 06, 2001 0183 32 Production of Solar Grade SoG Silicon by Refining Liquid Metallurgical Grade MG Silicon Final Report, 19 April 2001 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...

production process of special silicon powder for ,

the production process of solar-grade Silicon SOG-Si through trichlorosilane TCS in a program sponsored by New Energy Development Organization NEDO The NEDO process consists of the following two steps 1 TCS production from by , crusher production of slag for silicon refining molten sog solar diagram of plant for production of ....

Electrochemical Slag

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 ....

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...

production of slag for silicon refining

Jan 13, 2020 0183 32 May 28, 2014 Production of solar-grade silicon through metallurgical refining methods can be less expensive than current production methods both in terms of energy use and capital cost Slag refining is a potential metallurgical refining method for removal of ,...

Production of low

When the refining process is followed by directional solidification, it can be used for upgrading metallurgical grade MG silicon to produce solar grade SoG silicon For the long term, total ....

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crusher production of slag for silicon refining molten sog solar small limestone crusher for sale in south africac mobile crushing di southeastern pennsylvania gold mineral gold mobile crusher besly used crusher natural sand advantage disadvantage luzhou feeding renewable crusher auto pipe grinding machine...

Thermodynamics on SOG

Thermodynamics on SOG-Si Refining Processes Institute of Industrial Science, , ï½¥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 Slag SiO 2 Crucible Molten Si-Mg Alloy Molten MgSiO 3, SiO 2 satdMgO ....

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...

Quantitative evaluation for effective removal of ,

Production of solar cells has increased rapidly in recent years, and metallurgical production of solar grade silicon SoG-Si , has increased compared with more expensive processes such as Siemens process and Cz process It is important to understand the thermodynamic behavior of phosphorus in slag for optimized refinement of SoG-Si...

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 Refining processes such as ,...

Processes for Upgrading Metallurgical Grade Silicon to ,

Jan 01, 2012 0183 32 The slag refining process is a kind of well known batch process in which solute and even solid impurities in a molten metal are removed, and it is used in many metallurgical processes such as clean steel production The process operation may be not complicated and can be done in large scale in high capacity metallurgical vessels...

PDF Processes for Upgrading Metallurgical Grade Silicon ,

With regard to the uniqueness of directional solidification on removal a wide range of impurities from silicon, it is expected that this process will continue to be a part of the best developed process for SoG-Si production 32 Slag refining Slag refining technique is a process candidate for mainly B removal in which the boron impurity in ....