研究目的
To investigate the separation of silicon and aluminum, the main components of silicon-based solar cell modules, by flotation method for the purpose of purifying silicon from waste solar cell modules.
研究成果
The flotation separation method using SDS was effective for separating aluminum and silicon from waste solar cell modules. Optimal conditions were a pH of 7.0, SDS concentration between 1.0 and 2.5 g/L, and air flow rate of 2.5 L/min (STP). Under these conditions, 80.1 mass% of aluminum was floated and separated, achieving a silicon purity of 90.7%.
研究不足
The study was limited to the separation of silicon and aluminum from a mixture, and further research is needed for the separation of silicon from other elements in solar cells. The process may not guarantee the reusing for solar-grade silicon due to potential metal contamination.
1：Experimental Design and Method Selection:
The study focused on the flotation method for separating silicon and aluminum powders. Sodium dodecyl sulfate (SDS) and dodecyltrimethylammonium bromide (DTAB) were examined as collectors.
2：Sample Selection and Data Sources:
A mixture of aluminum and silicon powders was used, with purities of
3：0% and 5%, respectively. List of Experimental Equipment and Materials:
Equipment included a grinder mill (Osaka Chemical Co., Ltd, WB-1), a device for the measurement of ζ potential (Malvern Panalytical, Zetasizer Nano ZS), and a contact angle measuring device (Kyowa Interface Science Co., Ltd, Drop Master 300). Materials included SDS and DTAB.
4：0). Materials included SDS and DTAB. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The mixture was treated with SDS or DTAB solutions, and flotation separation was conducted under various conditions of pH, SDS concentration, dipping time, and air flowrate.
5：Data Analysis Methods:
The flotation recovery ratio and purity of silicon and aluminum were calculated from mass measurements before and after separation.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
