Clean enhancing elimination of boron from silicon kerf using Na2O-SiO2 slag treatment

Huang, Liuqing; Chen, Juan; Fang, Ming; Thomas, Sridevi; Danaei, Abdolkarim; Luo, Xuetao; Barati, Mansoor

doi:10.1016/j.jclepro.2018.03.152

Cited by 70 publications

(18 citation statements)

References 32 publications

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“…The proposed works contain phase-transfer separation, 5 centrifugation, 6 laser-assisted vacuum smelting, 7 hydrobromination, 8 slag refining and alloying process. 9,10 However, most of these studies are limited to the laboratory stage and the recovery scale is small. Therefore, it is necessary to explore an efficient, economic and feasible way to recycle the SCW for preparing high value-added products.…”

Section: Introductionmentioning

confidence: 99%

Study on the synthesis of β-SiC nanoparticles from diamond-wire silicon cutting waste

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Study on the synthesis of β-SiC nanoparticles from diamond-wire silicon cutting waste

et al. 2019

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“…19 Slag treatment is an industrially established refining process where impurities are removed by oxidation and dissolution reactions. 29,30 P in silicon oxidizes and forms phosphate in the molten slag phase (Eq. 1).…”

Section: Introductionmentioning

confidence: 99%

Removal of Phosphorus from Si-Fe Alloy by CaO-Al2O3-SiO2-Na2O Slag Refining

Taposhe

Khajavi

2021

JOM

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A combination of slag and solvent refining methods was used to remove phosphorus from silicon. The CaO-Al 2 O 3-SiO 2-Na 2 O quaternary system was selected as the slag to eliminate phosphorus from Si-20 wt.% Fe alloy at 1300°C. The partition ratio of phosphorus (L P) at various slag compositions was obtained to investigate the effect of basicity (CaO/SiO 2), oxygen potential (SiO 2 /Al 2 O 3) and Na 2 O content of the slag. The maximum value for L P was 1.19 at CaO/SiO 2 of 1.36, SiO 2 /Al 2 O 3 of 1.56 and the addition of 10 wt.% of Na 2 O. The critical partial pressure of oxygen for maximum phosphorus removal was estimated at 1.8 9 10 À22 atm. The normalized distribution and phosphate capacity were evaluated to clarify the effect of basicity. Corrected optical basicity and NBO/T were determined to consider the effect of the cations in the complex silicate structures and investigate the effect of the degree of depolymerization on the efficiency of phosphorus removal from silicon.

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“…14 Huang et al have explored a slagrefining method to remove the impurities, especially B in the SCW. 15 Tomono et al reported a hydrobromination process to separate pure Si from SCW. 16 Miguel et al utilized the aerosol method to collect high-purity Si from the SCW.…”

Section: Introductionmentioning

confidence: 99%

Effects and function mechanism of Fe‐containing additives on SiC synthesis with silicon cutting waste

Gao

Jiang

Xing

2021

Int J Applied Ceramic Tech

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With the rapid development of the photovoltaic industry, a great amount of silicon cutting waste (SCW) are being generated, which lead to a heavy environmental burden as well as a high cost of the photovoltaic industry. In this paper, the effects of Fe-containing additives and their function mechanism on recycling SCW to synthesize high-purity SiC were studied. The results show that Fecontaining additives, including Fe, Fe 2 O 3 , and Fe(NO 3 ) 3 , have obvious effect on recycling SCW to synthesize SiC. And Fe(NO 3 ) 3 additive achieves the best effect.Fe(NO 3 ) 3 can effectively destroy the SiO 2 film wrapped on the Si particles, so that expose the inner Si to C at lower temperatures than that of the reaction between C and SiO 2 . Besides, Fe(NO 3 ) 3 additive can effectively reduce the activation energy both for Si and C reactions and SiO 2 and C reactions, and contribute to the transport of the raw materials as well as the dissolution and precipitation of Si and C due to the formation of the FeSi melt at low temperatures. The optimal processing conditions are determined as Fe(NO 3 ) 3 addition of 1-3 wt.% and smelting temperature of 1200-1300°C.

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Clean enhancing elimination of boron from silicon kerf using Na2O-SiO2 slag treatment

Cited by 70 publications

References 32 publications

Study on the synthesis of β-SiC nanoparticles from diamond-wire silicon cutting waste

Study on the synthesis of β-SiC nanoparticles from diamond-wire silicon cutting waste

Removal of Phosphorus from Si-Fe Alloy by CaO-Al2O3-SiO2-Na2O Slag Refining

Effects and function mechanism of Fe‐containing additives on SiC synthesis with silicon cutting waste

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