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Vacuum distillation refining of metallurgical grade

【摘要】:The removal of impurity phosphorus from metallurgical grade silicon is one of the major problems on purification of metallurgical grade silicon for solar grade silicon preparation.The thermodynamics on vacuum refining process of the metallurgical grade silicon was studied via separation coefficient of impurity phosphorus in the metallurgical grade silicon and vapor-liquid

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Vacuum Refining of Molten Silicon SpringerLink

Sep 26, 2012 Metallurgical fundamentals for vacuum refining of molten silicon and the behavior of different impurities in this process are studied. A novel mass transfer model for the removal of volatile impurities from silicon in vacuum induction refining is developed. The boundary conditions for vacuum refining system—the equilibrium partial pressures of the dissolved elements

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Phosphorus removal from upgraded metallurgical-grade

Dec 01, 2017 Vacuum distillation refining of metallurgical grade silicon (Ⅰ) —thermodynamics on removal of phosphorus from metallurgical grade silicon Trans. Nonferrous Met. Soc. China,17 ( S1 ) ( 2007 ),pp. 1022 1025

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Vacuum Refining of Molten Silicon

Metallurgical grade silicon contains around 99 wt pct silicon, and its impurities are generated from the raw principle of crude metal vacuum distillation. The vapor pressures of selected pure substances between 1673 K and 2273 K (1400 C and 2000 C) were REFINING OF SILICON In vacuum refining process, a volatile solute element

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Vacuum refining of silicon at ultra-high temperatures

Feb 01, 2021 Several metallurgical methods are recently introduced for the removal of impurities from Si, such as slag refining,leaching refining,plasma refining,solvent refining,gas refining [8,9], and vacuum refining [,,,,]. Phosphorus (P) is so important to be controlled in Si since it is one of the major dopants for making the p-n junction

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Refining Silicon PVEducation

The impurity levels in metallurgical grade silicon5 vary widely due to process variation and the source raw materials of silica and carbon. Electronic Grade Silicon. A small amount of the metallurgical grade silicon is further refined for the semiconductor industry. Powdered MG-Si is reacted with anhydrous HCl at 300 °C in a fluidized bed

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Processes for Upgrading Metallurgical Grade Silicon to

Jan 01, 2012 Ji-Jun W, Wen-hui M, Bin Y, Yong-nian D, Morita K. Boron removal from metallurgical grade silicon by oxidizing refining. Trans. Nonferrous Met. China 2009; 19: 463.467. [32] Alemany C, Trassy C, Pateyron B, Li KI, Delannoy Y. Refining of metallurgical-grade silicon by inductive plasma. Solar Energy Materials & Solar Cells 2002; 72: 21-48. [33]

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26th European Photovoltaic Solar energy conference and

Keywords: Impurities, metallurgical grade, silicon, vacuum, refining . 1 INTRODUCTION . Vacuum distillation technique for the purification of molten metals and alloys has been developed mainly in the last century. This technique can be used to remove for

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Research on the Removal of Impurities from Crude Nickel by

Jan 01, 2012 Ma Wenhui, Wei Kuixian, Yang Bin, Liu Dachun, Dai Yongnian. Vacuum distillation refining of metallurgical grade silicon (II)—Kinetics on removal of phosphorus from metallurgical grade silicon[J]. Transactions of Nonferrous Metals Society of China. 2007 . 17(A02): 1026 -1029 .

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Polysilicon Production: Siemens Process Bernreuter Research

Upgraded metallurgical-grade silicon is fighting an uphill battle in a PV market where monocrystalline solar panels are dominating more and more. In view of emerging Chinese polysilicon giants with annual production capacities of more than 100,000 metric tons, the Siemens process will solidify its leading position. Published on June 29, 2020.

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Vacuum Refining of Molten Silicon

Metallurgical grade silicon contains around 99 wt pct silicon, and its impurities are generated from the raw principle of crude metal vacuum distillation. The vapor pressures of selected pure substances between 1673 K and 2273 K (1400 C and 2000 C) were REFINING OF SILICON In vacuum refining process, a volatile solute element

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26th European Photovoltaic Solar energy conference and

Keywords: Impurities, metallurgical grade, silicon, vacuum, refining . 1 INTRODUCTION . Vacuum distillation technique for the purification of molten metals and alloys has been developed mainly in the last century. This technique can be used to remove for

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Electromagnetic Levitation Refining of Silicon–Iron Alloys

Feb 10, 2017 Vacuum distillation refining of metallurgical grade silicon (I)—Thermodynamics on removal of phosphorus from metallurgical grade silicon. Transactions of Nonferrous Metals Society of China, 17, 1022–1025. CrossRef Google Scholar. 12. Khajavi, L. T., & Barati, M. (2012). Thermodynamics of phosphorus removal from silicon in solvent refining

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The 18th International Vacuum Conference (IVC-18)

Vacuum distillation as an effective purification method has been used in the preparation of high-purity bismuth [14] and the refining of the metallurgical grade silicon [15,16], etc. But the purification of crude nickel by vacuum distillation has not been reported. In this paper the purification of crude nickel by vacuum distillation was studied.

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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.

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Pretreatment of lead anode slime with low silver by vacuum

Mar 10, 2013 Beijing, Metallurgical industry Press, 2000: 45–62. (in Chinese) Google Scholar [12] MA Wen-hui, WEI Kui-xian, YANG Bin, LIU Da-chun, DAI Yong-nian. Vacuum distillation refining of metallurgical grade silicon (II)-Kinetics on removal of phosphorus from metallurgical grade silicon [J].

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metallurgical grade silicon ""crushing ""powder"" BINQ

Nov 18, 2012 vacuum distillation refining of metallurgical grade silicon . Also turnkey projects of crushing plant, powder plant. Grinding Solutions. Metallurgical Grade Silicon fractional distillation» More detailed. »More detailed

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Filtration and Purification Solutions for the Total

refining quartz or sand into metallurgical grade silicon, which is then purified in a series of chemical reactions. Next, during the Müller Rochow process, purified metallurgical grade silicon reacts with hydrogen chloride at elevated temperatures in the presence of a catalyst, to produce trichlorosilane (TCS). The TCS gas is cooled and liquified.

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CN100584972C Vacuum distillation purification method for

The present invention relates to a method and a device for lithium metal vacuum distillation and purification. The method comprises the processes that after the hot melting of crude lithium to be liquid lithium in protective medium, the protective medium is deprived with a vacuum impurity removing method, and then volatilizable impurity is separated from the lithium metal through vacuum

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Dephosphorization of Levitated Silicon-Iron Droplets for

May 14, 2018 The treatment of relatively inexpensive silicon-iron alloys is a potential refining route in order to generate solar-grade silicon. Phosphorus is one of the more difficult impurity elements to remove by conventional processing. In this study, electromagnetic levitation was used to investigate phosphorus behavior in silicon-iron alloy droplets exposed to H2-Ar gas mixtures under various

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《昆明理工大学真空冶金及材料研究所论文选》杨斌 编_孔网

工程技术书籍《昆明理工大学真空冶金及材料研究所论文选》作者:杨斌 编,出版社:冶金工业出版社,定价:88.00,在孔网购买该书享超低价格。《昆明理工大学真空冶金及材料研究所论文选》简介:本书为昆明理工大学真空冶金及材料研究所历年来所发表的论文精选集。

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process for production of silicon metal from quartz

The production of silicon goes through the gasification of MG-Si, distillation and deposition of silicon [2, 3]. Get Price Refining Silicon PVEducation. The manufacture of the hyperpure silicon for photovoltaics occurs in two stages. The oxygen is removed to produce metallurgical grade silicon.

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Generating and storing power on the moon using in situ

The Moon Village and similar concepts are strongly reliant on in situ resource utilisation (ISRU). There is great interest in harvesting solar power using local...

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Articoli di riviste sul tema "Crucible grafiati

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta ne

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The 18th International Vacuum Conference (IVC-18)

Vacuum distillation as an effective purification method has been used in the preparation of high-purity bismuth [14] and the refining of the metallurgical grade silicon [15,16], etc. But the purification of crude nickel by vacuum distillation has not been reported. In this paper the purification of crude nickel by vacuum distillation was studied.

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Refining Silicon PVEducation

Electronic Grade Silicon. A small amount of the metallurgical grade silicon is further refined for the semiconductor industry. Powdered MG-Si is reacted with anhydrous HCl at 300 °C in a fluidized bed reactor to form SiHCl 3. Si + 3HCl → SiHCl 3 + H 2. During this reaction impurities such as Fe, Al, and B react to form their halides (e.g

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CN100584972C Vacuum distillation purification method for

The present invention relates to a method and a device for lithium metal vacuum distillation and purification. The method comprises the processes that after the hot melting of crude lithium to be liquid lithium in protective medium, the protective medium is deprived with a vacuum impurity removing method, and then volatilizable impurity is separated from the lithium metal through vacuum

get price

Filtration and Purification Solutions for the Total

refining quartz or sand into metallurgical grade silicon, which is then purified in a series of chemical reactions. Next, during the Müller Rochow process, purified metallurgical grade silicon reacts with hydrogen chloride at elevated temperatures in the presence of a catalyst, to produce trichlorosilane (TCS). The TCS gas is cooled and liquified.

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7.10: Semiconductor Grade Silicon Chemistry LibreTexts

Sep 08, 2020 Metallurgical-grade silicon (MGS) The typical source material for commercial production of elemental silicon is quartzite gravel; a relatively pure form of sand (SiO 2).The first step in the synthesis of silicon is the melting and reduction of the silica in a submerged-electrode arc furnace.

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Transactions of Nonferrous Metals Society of China2007年S1期

Vacuum distillation refining of metallurgical grade silicon(Ⅱ)——Kinetics on removal of phosphorus from metallurgical grade silicon; 222. Removal of iron and aluminum impurities from metallurgical grade-silicon with hydrometallurgical route; 223. Microstructure and electric properties of Si_p/Al composites for electronic packaging

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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

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Cheaper Silicon for Photovoltaics: Siemens Process vs

Jun 27, 2018 Producing Metallurgical Grade Silicon. In most cases, the silicon used for solar cells is derived from metallurgical grade silicon. This metallurgical grade silicon is produced by reducing silica from quartz sand with carbon: SiO2(l)+2C(s)=Si(l)+2CO(g). Next, carbon electrodes are often used in a furnace to create temperatures of around 2000°C, so that many impurities become volatile.

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PV Blowback Filtration Units Pall

The process of producing polysilicon (PS) begins with refining quartz or sand into metallurgical grade silicon, which is then purified in a series of chemical reactions. Next, during the Müller Rochow process, purified metallurgical grade silicon reacts with hydrogen chloride at elevated temperatures in the presence of a catalyst, to produce

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Silicon

Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid and semiconductor.It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive. Because of its high chemical affinity for oxygen

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Impurity removal and overall rate constant during low

Abstract The research presented analyzes the effect of low pressure on the amount and reduction of impurity elements in upgraded metallurgical grade silicon. The achieved pressure was 5 kPa in the commercial electro-resistance furnace in the magnesia and mullite refractory material. The chemical composition was determined by ICP-MS method. Elements such as Al, Fe, Mn, Cu or Zn had the

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Dephosphorization of Levitated Silicon-Iron Droplets for

The availability, quality and cost of silicon feedstock are29 of paramount importance for growth of 30 the photovoltaic sector within the global energy mix. 31 The upgrading of inexpensive silicon-iron alloys or metallurgical grade silicon is a potentially 32 economical refining route in order to generate solar-grade silicon. Numerous

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US3880652A Method for purification of titanium sponge

A method for removing magnesium and magnesium chloride from titanium sponge, after production thereof by reaction of titanium tetrachloride and magnesium, by introducing a high-temperature inert gas through the reaction product to vaporize the magnesium and magnesium chloride and then removing it in this gaseous form.

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Generating and storing power on the moon using in situ

The Moon Village and similar concepts are strongly reliant on in situ resource utilisation (ISRU). There is great interest in harvesting solar power using local...

get price