Purification of Organosilicon Waste Silicon Powder with Hydrometallurgy

Waste silicon powder produced during the production process of organosilicon materials is a major environmental concern that can lead to pollution and resource wastage. As a result, it is crucial to find efficient ways of recovering and utilizing this waste material. In this study, the morphology of...

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Bibliographic Details
Published in:Metals (Basel ) 2023-05, Vol.13 (5), p.950
Main Authors: Zhao, Liping, Li, Zuyu, Xi, Fengshuo, Li, Shaoyuan, Ma, Wenhui, Wu, Jijun, Wei, Kuixian
Format: Article
Language:English
Subjects:
Aerospace materials
Chemical etching
Chemical reactions
Experiments
Hydrogen peroxide
Hydrometallurgy
Impurities
impurity removal
Leaching
metal-assisted chemical etching (MACE)
Methods
Morphology
Nickel
Powders
Purification
Raw materials
Scanning electron microscopy
Silicon
Silicones
Slag
Spectrum analysis
Sustainable development
Temperature
waste silicon powder
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Summary:Waste silicon powder produced during the production process of organosilicon materials is a major environmental concern that can lead to pollution and resource wastage. As a result, it is crucial to find efficient ways of recovering and utilizing this waste material. In this study, the morphology of waste silicon powder was systematically studied, and an optimized purification method was proposed based on a hydrometallurgical process and phase analysis. The complex composition of waste silicon powder presents a significant challenge during its recycling. However, the results of this study showed that metal-assisted chemical etching (MACE), followed by mixed acid system leaching, is the most effective method for removing impurities from the material. The superior order of different acid systems for removing metallic impurities was HCl < HF < HF + HCl < HF + H2O2 < CuACE. It is worth noting that CuACE treatment has a remarkable ability to remove more than 95% of Fe through hydrometallurgy.
ISSN:2075-4701
2075-4701
DOI:10.3390/met13050950