production of slag for silicon refining molten sog solar

production of slag for silicon refining molten sog solar

production of slag for silicon refining -molten -sog -solar

production of slag for silicon refining -molten -sog -solar. Modded Factorio #17 Slag Refining YouTube. Aug 20, 2017· Modded Factorio! Slag is going to start blocking us up so it's time to start refining it. Playlist for this series: https://get price. extraction and refining silica. Refining Silicon PVEducation. Silica is the dioxide form of silicon (SiO 2) and occurs naturally in the form

production of slag for silicon refining molten sog solar

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. Electrochemical Slag-Metal Reaction for Silicon

production of slag for silicon refining molten sog solar

Study of boron removal from molten silicon by slag . Study of boron removal from molten silicon by slag refining under atmosphere Lei Zhanga,b,YiTana,b, Jiayan Lia,b,n, a global shortage in the solar-grade silicon (SoG-Si) used in the production of solar quickly to ensure the mass production of solar

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 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute • Battelle • Bechtel Contract No. DE-AC36-99-GO10337. December 1999 •

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

Slag refining of silicon and silicon alloys : a review

To eliminate B effectively from Si for its use in a solar cell, a novel process involving the slag refining of molten Si with Sn addition was investigated. The partition ratio of B between CaO

Thermodynamics of solar-grade-silicon refining

01.01.2003· 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 proposed. 2. Characteristics of silicon during

Cited by: 307

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 must differ markedly from it in density. The

Author: Saiful Islam, Muhammad A. Rhamdhani, Geoffrey A. Brooks

Processes for Upgrading Metallurgical Grade Silicon to

01.01.2012· 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

Cited by: 108

Silicon processing: from quartz to crystalline silicon

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 metallurgical-grade silicon via the chemical means to polycrystalline silicon, or through the metallurgical route to solar-grade silicon, wafer manufacturing, and, lastly, silicon solar

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Production Of Slag For Silicon Refining Molten Sog Solar

Production Of Slag For Silicon Refining Molten Sog Solar. We are a large-scale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment, milling equipment, mineral processing equipment and building materials equipment. And they are mainly used to crush coarse minerals like gold and

Thermodynamics of solar-grade-silicon refining

01.01.2003· 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 proposed. 2. Characteristics of silicon during

Production of Solar Grade (SoG) Silicon by Refining

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 evacuation, formation of

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 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute •

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.

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.

Processes for Upgrading Metallurgical Grade Silicon to

cells, low-cost solar-grade silicon (SoG-Si) feedstock is demanded. The most cost-effective and direct approach for producing SoG-Si is to purify and upgrade metallurgical-grade silicon. Many impurities in MG-Si can be effectively removed through directional solidification of molten silicon. However, the removal of boron (B) and phosphorus (P) by this method is difficult and expensive due to

Silicon processing: from quartz to crystalline silicon

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 metallurgical-grade silicon via the chemical means to polycrystalline silicon, or through the metallurgical route to solar-grade silicon, wafer manufacturing, and, lastly, silicon solar

Kinetics of Silicon Refining using Slag Treatment

Slag refining is one of the few metallurgical methods for the efficient removal of boron from silicon. In order to produce silicon for photovoltaic applications, the relationship between the slag composition and the mass transfer rate of

BORON REMOVAL FROM METALLURGICAL GRADE SILICON

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.

Kinetics of Silicon Refining using Slag Treatment

Slag refining is one of the few metallurgical methods for the efficient removal of boron from silicon. In order to produce silicon for photovoltaic applications, the relationship between the slag composition and the mass transfer rate of

Distribution of impurity elements in slag silicon

The possibility of refining metallurgical grade silicon to a high-purity product for solar cell applications by the slagging of impurity elements was investigated. Distribution coefficients were determined for B, Ca, Mg, Fe, K and P between magnesia or alumina saturated Al 2

Thermodynamic criteria of the end-of-life silicon wafers

in Figure 2(a), produced from solar-grade silicon (SoG-Si) (>99.9999% purity), is typically a moderately doped p-type c-Si semiconductor with a heavy doped n+-type layer on the top side and heavy doped p+-type layer on the back side. Figure 2(b) schematically shows the recycling loop of silicon wafers from EoL c-Si PV panels for new SoG-Si. The recycling process of the EoL c-Si PV panels

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

Solar Grade Silicon Refining and Silicide Production

Titanium silicide (Ti 5 Si 3) is a promising new material for very-high-temperature structural applications.We 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 was studied.

BORON REMOVAL FROM METALLURGICAL GRADE SILICON

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.

Boron removal in purifying metallurgical grade silicon by

produced by the Simens process have been supplied to the photovoltaic industry [3,4]. The metallurgical route is an increasingly popular method in the range from purifying metallurgical grade silicon (MG-Si) to solar grade silicon (SoG-Si). However, boron removal from MG-Si is still a puzzle as a result of the low vapour pressure for boron [5] and the large segregation coefficient for boron to

EP2024284A2 Silicon refining process Google Patents

The process may be followed by oxidative refining, SiC settling, the Silgrain process and directional solidification to remove other impurities and produce silicon suitable for use in solar cells. In an alternative version of the process, the molten silicon is passed through a particulate bed formed of a nitrogen-containing compound and an aluminum-containing compound.

Thermodynamics on SOG-Si Refining Processes

･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 Si alloys - Optimized Process Combined with Leaching Treatment 3. Solidification refining of Si with Si-Al

REMOVING BORON FROM METALLURGICAL GRADE SILICON BY

The molten slag refining is a traditional method using in the purification of steel making 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 (MG-Si).

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