scholarly journals Removal of B from Si by Hf addition during Al–Si solvent refining process

2016 ◽  
Vol 17 (1) ◽  
pp. 12-19 ◽  
Author(s):  
Yun Lei ◽  
Wenhui Ma ◽  
Luen Sun ◽  
Jijun Wu ◽  
Yongnian Dai ◽  
...  
Keyword(s):  
Refining Process ◽  
Solvent Refining ◽  
Hf Addition

Effect of Ga Addition on Morphology and Recovery of Primary Si During Al–Si Alloy Solidification Refining

2015 ◽  
Vol 34 (8) ◽  
Author(s):  
Jingwei Li ◽  
Xiaolong Bai ◽  
Yanlei Li ◽  
Boyuan Ban ◽  
Jian Chen
Keyword(s):  
Recovery Rate ◽  
Plate Thickness ◽  
Refining Process ◽  
Alloy Solidification ◽  
Solvent Refining ◽  
Plate Length ◽  
Primary Si ◽  
Ga Content

AbstractThe effect of Ga addition on alloy macrostructure, morphology and recovery rate of primary Si during the Al–Si–Ga alloy solvent refining process of silicon was studied in this work. The addition of Ga to Al–Si alloy could change the morphology of the primary Si. The average plate thickness of the primary Si increases with increase of Ga content. With the increase of Ga content, the average plate length of the primary Si crystals becomes larger when the Ga content is less than 5% in the Al–30%Si–

scholarly journals Separation and Recovery of Refined Si from Al–Si Melt by Modified Czochralski Method

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 996
Author(s):  
Jingwei Li ◽  
Juncheng Li ◽  
Yinhe Lin ◽  
Jian Shi ◽  
Boyuan Ban ◽  
...  
Keyword(s):  
Industrial Application ◽  
Alloy System ◽  
Silicon Powder ◽  
Czochralski Method ◽  
Refining Process ◽  
Solar Grade Silicon ◽  
Solvent Refining ◽  
Grade Silicon ◽  
Czochralski Process ◽  
Removal Fraction

Separation of refined silicon from Al–Si melt is still a puzzle for the solvent refining process, resulting in considerable waste of acid and silicon powder. A novel modified Czochralski method within the Al–Si alloy is proposed. After the modified Czochralski process, a large amount of refined Si particles was enriched around the seed crystalline Si and separated from the Al–Si melt. As for the Al–28%Si with the pulling rate of 0.001 mm/min, the recovery of refined Si in the pulled-up alloy (PUA) sample is 21.5%, an improvement of 22% compared with the theoretical value, which is much larger 1.99 times than that in the remained alloy (RA) sample. The content of impurities in the PUA is much less than that in the RA sample, which indicates that the modified Czochralski method is effective to improve the removal fraction of impurities. The apparent segregation coefficients of boron (B) and phosphorus (P) in the PUA and RA samples were evaluated. These results demonstrate that the modified Czochralski method for the alloy system is an effective way to enrich and separate refined silicon from the Al–Si melt, which provide a potential and clean production of solar grade silicon (SoG-Si) for the future industrial application.

ALLEGHENY LUDLUM E-BRITE 26-1 ALLOY

Alloy Digest ◽  
1979 ◽  
Vol 28 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Crevice Corrosion ◽  
Heat Treating ◽  
Refining Process ◽  
Low Carbon ◽  
Vacuum Refining ◽  
Temperature Performance ◽  
Corrosive Environments ◽  
Chloride Stress Corrosion Cracking ◽  
Low Nitrogen

Abstract ALLEGHENY LUDLUM E-BRITE 26-1 ALLOY is a low-carbon, low-nitrogen ferritic stainless steel made by a vacuum refining process. It provides: (1) Excellent resistance to pitting and crevice corrosion in chloride-containing environments, (2) Excellent resistance to chloride stress-corrosion cracking, (3) Resistance to intergranular corrosion, (4) Resistance to a wide variety of corrosive environments, and (5) Improved toughness and ductility after welding. Its applications include equipment for handling caustic, organic acids, nitric acid, bleach solutions, urea and chloride containing cooling waters. This datasheet provides information on composition, physical properties, microstructure, hardness, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-360. Producer or source: Allegheny Ludlum Corporation.

Extra colour removal in a refinery

2011 ◽  
pp. 718-725 ◽  
Author(s):  
Laura Diego ◽  
Fernando Martín ◽  
Marta G de Quevedo ◽  
Jaime Sagristá
Keyword(s):  
Refining Process ◽  
Ion Exchange Resins ◽  
Colour Removal ◽  
Precipitated Calcium Carbonate ◽  
Sodium Bisulphite ◽  
Powdered Carbon ◽  
Raw Sugar ◽  
Sugar Refinery ◽  
Exchange Resins ◽  
Main Factor

The main factor affecting the raw sugar refining process is certainly “colour”. The higher colour removal, the higher is the obtained sugar yield. Therefore, colour removal is the main goal throughout the process. In a conventional sugar refinery colour is removed in the purification and decolorisation steps – the second one is normally done using ion-exchange resins – but there are some other ways of colour removal such as adding some colour removing agents (powdered carbon, sodium bisulphite, PCC [precipitated calcium carbonate]). In this article the pilot plant results of experiments of increasing colour removal in the refining process are described, such as PCC addition, 3rd carbonatation (re-purification), hydrogen peroxide addition, powdered carbon addition, sodium bisulphite addition and crystallization improvements. The good results achieved in some of these trials led to perform some industrial trials, the results of wich are summarized in this article as well.

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