Recovery of Silicon Kerf Through Oxidative Cleaning and Drying Process
High quantity of slurries, kerf, are generated during ingot wafering and represent up to 40% of the silicon in weight. The highly pure silicon contained in kerf is contaminated with organics, metal impurities, water and an oxide layer. The recovery of the silicon could be an efficient way to reduce...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
TIB Open Publishing
2025-02-01
|
| Series: | SiliconPV Conference Proceedings |
| Subjects: | |
| Online Access: | https://www.tib-op.org/ojs/index.php/siliconpv/article/view/1301 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832541080884609024 |
|---|---|
| author | Marion Chevallier Jean-Baptiste Antoine Francis Marchitto Yoann Doré Yun Luo Yohan Parsa |
| author_facet | Marion Chevallier Jean-Baptiste Antoine Francis Marchitto Yoann Doré Yun Luo Yohan Parsa |
| author_sort | Marion Chevallier |
| collection | DOAJ |
| description |
High quantity of slurries, kerf, are generated during ingot wafering and represent up to 40% of the silicon in weight. The highly pure silicon contained in kerf is contaminated with organics, metal impurities, water and an oxide layer. The recovery of the silicon could be an efficient way to reduce costs in the production of solar panels through material and energy savings. At high temperatures, organic contamination causes the formation of silicon carbide species that are difficult to segregate during kerf remelting into a pure silicon ingot. Also, during the fusion of silicon, temperatures up to 1500°C are reached and the mixture of silicon and water forms oxides and gases that reduce production yields and affect melting conditions. For these reason, purification and drying steps are required to ensure proper silicon raw material for remelting into ingots. So far, approaches using strong acidic or organic solvent are used to reduce contamination by organic compounds. In this study, more environmentally friendly processes were applied on authentic kerf waste to purify and dry silicon, to make it suitable as raw material for silicon ingot preparation. The amount of water and organic compounds were monitored along the process steps. Using aqueous oxidative processes in combination with filtration, kerf was cleaned and a total carbon reduction of at least 30% was observed. The control of humidity enables the convenient conditioning of purified kerf and effective drying reduced the moisture content to less than 5% wt.
|
| format | Article |
| id | doaj-art-7b0ab78fdedf48759fb1bb872c51b18e |
| institution | Kabale University |
| issn | 2940-2123 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | TIB Open Publishing |
| record_format | Article |
| series | SiliconPV Conference Proceedings |
| spelling | doaj-art-7b0ab78fdedf48759fb1bb872c51b18e2025-02-04T09:54:12ZengTIB Open PublishingSiliconPV Conference Proceedings2940-21232025-02-01210.52825/siliconpv.v2i.1301Recovery of Silicon Kerf Through Oxidative Cleaning and Drying ProcessMarion Chevallier0https://orcid.org/0000-0002-1950-0182Jean-Baptiste Antoine1https://orcid.org/0009-0003-0088-2293Francis Marchitto2Yoann Doré3Yun Luo4Yohan Parsa5ROSIROSIROSIROSIROSIROSI High quantity of slurries, kerf, are generated during ingot wafering and represent up to 40% of the silicon in weight. The highly pure silicon contained in kerf is contaminated with organics, metal impurities, water and an oxide layer. The recovery of the silicon could be an efficient way to reduce costs in the production of solar panels through material and energy savings. At high temperatures, organic contamination causes the formation of silicon carbide species that are difficult to segregate during kerf remelting into a pure silicon ingot. Also, during the fusion of silicon, temperatures up to 1500°C are reached and the mixture of silicon and water forms oxides and gases that reduce production yields and affect melting conditions. For these reason, purification and drying steps are required to ensure proper silicon raw material for remelting into ingots. So far, approaches using strong acidic or organic solvent are used to reduce contamination by organic compounds. In this study, more environmentally friendly processes were applied on authentic kerf waste to purify and dry silicon, to make it suitable as raw material for silicon ingot preparation. The amount of water and organic compounds were monitored along the process steps. Using aqueous oxidative processes in combination with filtration, kerf was cleaned and a total carbon reduction of at least 30% was observed. The control of humidity enables the convenient conditioning of purified kerf and effective drying reduced the moisture content to less than 5% wt. https://www.tib-op.org/ojs/index.php/siliconpv/article/view/1301KerfSiliconRecyclingOxidative ProcessCleaning Process |
| spellingShingle | Marion Chevallier Jean-Baptiste Antoine Francis Marchitto Yoann Doré Yun Luo Yohan Parsa Recovery of Silicon Kerf Through Oxidative Cleaning and Drying Process SiliconPV Conference Proceedings Kerf Silicon Recycling Oxidative Process Cleaning Process |
| title | Recovery of Silicon Kerf Through Oxidative Cleaning and Drying Process |
| title_full | Recovery of Silicon Kerf Through Oxidative Cleaning and Drying Process |
| title_fullStr | Recovery of Silicon Kerf Through Oxidative Cleaning and Drying Process |
| title_full_unstemmed | Recovery of Silicon Kerf Through Oxidative Cleaning and Drying Process |
| title_short | Recovery of Silicon Kerf Through Oxidative Cleaning and Drying Process |
| title_sort | recovery of silicon kerf through oxidative cleaning and drying process |
| topic | Kerf Silicon Recycling Oxidative Process Cleaning Process |
| url | https://www.tib-op.org/ojs/index.php/siliconpv/article/view/1301 |
| work_keys_str_mv | AT marionchevallier recoveryofsiliconkerfthroughoxidativecleaninganddryingprocess AT jeanbaptisteantoine recoveryofsiliconkerfthroughoxidativecleaninganddryingprocess AT francismarchitto recoveryofsiliconkerfthroughoxidativecleaninganddryingprocess AT yoanndore recoveryofsiliconkerfthroughoxidativecleaninganddryingprocess AT yunluo recoveryofsiliconkerfthroughoxidativecleaninganddryingprocess AT yohanparsa recoveryofsiliconkerfthroughoxidativecleaninganddryingprocess |