crusher production of slag for silicon refining molten sog s

crusher production of slag for silicon refining molten sog sProduction of Solar Grade (SoG) Silicon by Refining Liquid  · @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 As a common building material, limestone is widely used in cement, decoration, building materials and other industries due to its wide source and low cost.In general, limestone processing into stone, the need to use the equipment that we often say crusher, also known as the shredder, stone machine, no matter what is called, in the final analysis is the limestone processing into the specific industry needs the size, particle size, then processing limestone with which machine is more appropriate? 1. Jaw crusher + impact crusher Jaw crusher is generally used for primary breaking operations, all kinds of soft and hard stones can be broken efficiently, for limestone this kind of low hardness material treatment effect is also very good;Secondly, the impact crusher itself focuses on soft stone crushing operation, and the impact crusher itself covers the plastic function, the finished stone particle is very good, is the ideal limestone processing equipment, both with high efficiency and high yield

Production of Solar Grade (SoG) Silicon by Refining Liquid

 · @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.

Processes for Upgrading Metallurgical Grade Silicon to

 · 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. 3.2. Slag refining Slag refining technique is a process candidate for mainly B removal in which the boron impurity in .

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 .

An Evolving Method for Solar-Grade Silicon Production

While production of solar-grade silicon (SOG-Si) has been dominated recently by the modified Siemens process and a fluidized bed reactor process, obtaining a stable supply of SOG …

Electrochemical Slag-Metal Reaction for Silicon Production

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 slag must be low, and the slag must be nonreactive with molten silicon and .

Silicon Production by Molten Salt Electrolysis | SpringerLink

 · The world production of SOG-Si was estimated to be approximately 0.15 million metric ton in 2011. SEG-Si is also produced chiefly by Siemens process, and its world production was estimated to be about 0.03 million metric ton in 2011. Until now, silicon has not been practically produced by molten salt electrolysis.

Kinetics of Silicon Refining using Slag Treatment

Slag/Silicon mass ratio=2.5 1.4 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

Thermodynamics on SOG-Si Refining Processes

Thermodynamics on SOG-Si Refining Processes Institute of Industrial Science, . ・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 satd.MgO .

Recycling of carbonized rice husk for producing high

 · Silicon (Si) with a minimum purity of 99.9999% (6 N), which is called solar grade silicon (SoG-Si), has been used as a feedstock material for PV industry . Many efforts have been devoted to the production of SoG-Si to meet the rising demand for silicon-based PV devices.

Removal of boron and phosphorus from silicon using

silicon, accounting for one third of the finished module cost. In recent years a lot of research has been conducted on refining metallurgical grade silicon (MGof -Si, purity>96%) to solar grade silicon (SoG-Si), with the ultimate goal of reducing the production cost. Metallurgical refining route has

Electrochemical Slag-Metal Reaction for Silicon

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 slag must be low, and the slag must be nonreactive with molten silicon and .

Kinetics of Silicon Refining using Slag Treatment

Slag/Silicon mass ratio=2.5 1.4 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

Recycling of carbonized rice husk for producing high

 · Silicon (Si) with a minimum purity of 99.9999% (6 N), which is called solar grade silicon (SoG-Si), has been used as a feedstock material for PV industry . Many efforts have been devoted to the production of SoG-Si to meet the rising demand for silicon-based PV devices.

US8329133B2Method and apparatus for refining

A method and apparatus for refining metallurgical silicon to produce solar grade silicon for use in photovoltaic cells. A crucible in a vacuum furnace receives a mixture of metallurgical silicon and a reducing agent such as calcium disilicide. The mix is melted in non-oxidizing conditions within the furnace under an argon partial pressure.

EP2024284A2Silicon refining processGoogle Patents

Nitrogen and aluminum and fluxing agents (AI2O3, SiO2, CaO and MgO) are added to molten silicon to create an oxy-nitride slag that acts as a sink for dissolved boron and phosphorus. The nitrogen can be added by bubbling nitrogen gas through the molten silicon; the aluminum can be added as aluminum metal or as AI2O3. Normally, the silicon must initially be deoxidized to allow the boron and .

BORON REMOVAL FROM METALLURGICAL GRADE

The slag refining for boron removal from metallurgical grade silicon is a promising metallurgical process for producing solar grade silicon. In this paper, FeCl 2 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 FeCl 2

Thermodynamics on SOG-Si Refining Processes

Thermodynamics on SOG-Si Refining Processes Institute of Industrial Science, . ・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 satd.MgO .

vacuum distillation refining of metallurgical grade silicon

silicon melts. This work is of interest for the production of solargrade silicon since phosphorus is hard to remove from silicon and is an important impurity in solar cells. The primary objective of the testwork was to study the effect of iron on phosphorus removal from silicon via induction vacuum refining…

Removal of boron and phosphorus from silicon using

silicon, accounting for one third of the finished module cost. In recent years a lot of research has been conducted on refining metallurgical grade silicon (MGof -Si, purity>96%) to solar grade silicon (SoG-Si), with the ultimate goal of reducing the production cost. Metallurgical refining route has

Application of Electron Beam Melting to the Removal of

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. Because P evaporates preferentially from molten Si due .

Stone Refining SiliconSoby

A silicon refining process according to claim 1, wherein the reaction chamber is heated differentially as the molten silicon metal is flowed downwardly therethrough, heating of the upper part of said chamber being such as to maintain the temperature therein only slightly above the melting temperature of said metal, and heating of the lower part.

Silicon Mine And Refining Production

Refining Silicon PVEducation. Of the 1.8 million tonnes of metallurgical silicon produced in 2010, 12 % was for the production of silicon solar cells.2. Metallurgical (MG) silicon is produced at the rate of millions of tons/year at a low economic cost of few $/kg and an energy cost of 1416 kWh/kg.

Solar Silicon Processes

3.1 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 treatments of MG-Si in .

Production of solar grade (SoG) silicon by refining liquid

@article{osti_753817, title = {Production of solar grade (SoG) silicon by refining liquid metallurgical grade (MG) silicon: Annual Report: June 10 1998--October 19, 1999}, author = {Khattak, C P and Joyce, D B and Schmid, F}, abstractNote = {Pyro-metallurgical refining techniques are being developed for use with molten metallurgical-grade (MG) silicon so that directionally solidified refined .