Improving flotation separation of micro Si/SiC particles from silicon sawing waste by surface hydrophilic modification
文献类型：期刊论文
| 作者 | Wang, Dong1,2; Chen, Xuanyi3; Hua, Yong2; Wang, Zhi1,3,5; Liu, Changming4; Wang, Zhankui1; Qian, Guoyu1,5 |
| 刊名 | MINERALS ENGINEERING
 |
| 出版日期 | 2023 |
| 卷号 | 191页码:8 |
| 关键词 | Silicon sawing waste Micro Si SiC separation Flotation separation Surface modification Hydrophobicity |
| ISSN号 | 0892-6875 |
| DOI | 10.1016/j.mineng.2022.107962 |
| 英文摘要 | Silicon sawing waste (MSW) produced by mortar cutting causes serious environmental issues and a waste of highpurity silicon. The major obstacle in the recovery of high-purity silicon (Si) is the separation of microscale Si and silicon carbide (SiC) in MSW. In this study, micro Si/SiC in silicon sawing waste was separated effectively by bulk-oil flotation after surface hydrophilic modification of Si particles. The structural evolution of micro Si surface after wet oxidization in water and acid was characterized by FT-IR, TEM, and XPS. Specifically, the wet oxidization process reduced the contact angle from 63 +/- 0.3 degrees to 18.5 degrees of Si surface for the coating of an amorphous oxide with hydroxy groups on Si particles enhanced the wettability. The amorphous oxide layer with hydroxy coated on Si particles played a key role in enhancing the wettability of Si particles. The wet oxidization is essential to the subsequent flotation separation for the contact angle of SiC keeping at around 60.3 degrees. The wettability of silicon sawing waste was further examined by the absorption of diesel. The effects of pH value and solid concentration on separation efficiency were studied. The best result obtained was 95% in Si recovery and 97.1 wt% in Si purity. |
| WOS关键词 | KERF-LOSS SILICON ; LOSS SLURRY ; CUTTING WASTE ; RECOVERY ; POWDER ; WETTABILITY ; REMOVAL ; SI |
| 资助项目 | National Key R&D Program of China ; National Natural Science Foundation of China ; [2018YFC1901804] ; [51934006] ; [U1902219] ; [52274412] |
| WOS研究方向 | Engineering ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000903990700005 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/56427]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Wang, Zhi; Qian, Guoyu |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Res Ctr Green Recycling Strateg Met Reso, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341119, Peoples R China 3.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China 4.Zhejiang Jinko Solar Co Ltd, Haining 314400, Zhejiang, Peoples R China 5.1 North 2nd St Zhongguancun, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Dong,Chen, Xuanyi,Hua, Yong,et al. Improving flotation separation of micro Si/SiC particles from silicon sawing waste by surface hydrophilic modification[J]. MINERALS ENGINEERING,2023,191:8. |
| APA | Wang, Dong.,Chen, Xuanyi.,Hua, Yong.,Wang, Zhi.,Liu, Changming.,...&Qian, Guoyu.(2023).Improving flotation separation of micro Si/SiC particles from silicon sawing waste by surface hydrophilic modification.MINERALS ENGINEERING,191,8. |
| MLA | Wang, Dong,et al."Improving flotation separation of micro Si/SiC particles from silicon sawing waste by surface hydrophilic modification".MINERALS ENGINEERING 191(2023):8. |
入库方式： OAI收割
来源：过程工程研究所
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