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%.

Graphical Abstract

中文翻译：

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电磁法金刚线锯硅粉制备亚共晶铝硅合金的研究

_{研究了功率、保温时间、Na 2} CO ₃和CaO添加量对金刚石线锯硅粉(DWSSP)制备的亚共晶Al-Si合金中Si利用率和Al损失率的影响。研究发现，合适的加热功率有利于提高DWSSP的利用率和合金质量，而不当的加热功率会导致炉料损失和电耗增加。保温时间不足，导致合金中杂质增多，严重影响合金质量。延长保温时间会造成能源消耗过多，铝损增加。Na ₂ CO ₃可以提高DWSSP中Si的利用率，过量的Na ₂ CO ₃会导致铝损增加和合金中出现气泡。适量添加CaO可以有效去除杂质，提高合金中Si和Al的含量，但过量的CaO会导致Si利用率下降，Al利用率增加，Ca杂质富集。当加热功率10kW、保温时间45min、添加10%CaO+10%Na ₂ CO ₃条件下，硅利用率为62.45%，铝损失率为45.10%。

图形概要