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Study on Preparation of Hypoeutectic Al–Si Alloy from Diamond Wire Saw Silicon Powder by Electromagnetic Method

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Abstract

The effects of power, holding time, Na2CO3, and CaO addition on Si utilization and Al loss rate in hypoeutectic Al-Si alloy prepared by diamond wire saw silicon powder (DWSSP) were investigated. It is found that the appropriate heating power is beneficial to improve the utilization rate of DWSSP and the quality of the alloy, while improper heating power leads to the loss of furnace feed and the increase of power consumption. Insufficient holding time, resulting in an increase in impurities in the alloy, which seriously affects the quality of the alloy. Prolonging the holding time causes excessive energy consumption and increased aluminum loss. Na2CO3 can improve the utilization rate of Si in DWSSP, excessive Na2CO3 can induce an increase in aluminum loss and the appearance of bubbles in the alloy. Appropriate addition of CaO can effectively remove impurities and increase the content of Si and Al in the alloy, but excessive CaO leads to the decrease of Si utilization rate, the increase of Al utilization rate, and the enrichment of Ca impurities. When the condition of heating power of 10 kW, holding time of 45 min, and adding 10% CaO + 10% Na2CO3, the utilization rate of silicon is 62.45%, and the loss rate of aluminum is 45.10%.

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Funding

The authors are grateful to the financial support by the National Natural Science Foundation of China (No. 22268027), Key Research and Development Project of Yunnan Province (No. 202002AB080030 and No. 202103AA080003), and Major Science and Technology Projects in Yunnan Province (No. 202202AG050012).

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Authors and Affiliations

  1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China

    Ruifeng Zhang, Chengzhi Gui, Yun Lei, Wenhui Ma & Guoqiang Lv

  2. State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming, 650093, China

    Ruifeng Zhang, Chengzhi Gui, Yun Lei, Wenhui Ma & Guoqiang Lv

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  1. Ruifeng Zhang
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  2. Chengzhi Gui
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Correspondence to Guoqiang Lv.

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The contributing editor for this article was Mansoor Barati.

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Zhang, R., Gui, C., Lei, Y. et al. Study on Preparation of Hypoeutectic Al–Si Alloy from Diamond Wire Saw Silicon Powder by Electromagnetic Method. J. Sustain. Metall. 10, 41–54 (2024). https://doi.org/10.1007/s40831-023-00768-0

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  • DOI: https://doi.org/10.1007/s40831-023-00768-0

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