School of Metallurgy, Northeastern University, Shenyang, 110819, PR China.
Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang, 110819, China.
J Environ Manage. 2021 Jul 15;290:112548. doi: 10.1016/j.jenvman.2021.112548. Epub 2021 Apr 17.
Large amounts of silicon cutting waste (SCW) are generated during Si wafers producing process. In this paper, SCW was mixed with Al powder to prepare Al-Si alloys by a one-step smelting process in corundum crucibles. The influences of smelting temperature (1000 °C, 1200 °C and 1500 °C) on the products of each zone (surface layer zone, loose granular zone and blocky products zone) were investigated. Al-Si alloys in the form of granular and blocky were prepared and the blocky Al-Si alloys mainly concentrated in the blocky products zone. The increase of smelting temperature can promote the aggregation of Al-Si alloy particles. The yields of Al-Si alloy blocks obtained at 1000 °C, 1200 °C and 1500 °C were 0%, 58% and 69%, respectively. The Si contents of Al-Si alloy blocks at 1200 °C and 1500 °C were 15.8 wt% and 17.1 wt% respectively. After compacting the raw materials, the yields of the blocky Al-Si alloys obtained at 1000 °C, 1200 °C and 1500 °C were increased to 65%, 72% and 79% and the corresponding Si contents of the blocky Al-Si alloys were increased to 16.0 wt%, 16.5 wt% and 17.3 wt% respectively. The reaction mechanism of the alloying process was also investigated.
大量的硅切割废料（SCW）在硅片生产过程中产生。本文采用一步熔炼法，在刚玉坩埚中，将 SCW 与 Al 粉混合制备 Al-Si 合金。研究了熔炼温度（1000°C、1200°C 和 1500°C）对各区域（表面层区、疏松颗粒区和块状产品区）产物的影响。以颗粒状和块状形式制备了 Al-Si 合金，块状 Al-Si 合金主要集中在块状产品区。熔炼温度的升高可以促进 Al-Si 合金颗粒的聚集。在 1000°C、1200°C 和 1500°C 下获得的块状 Al-Si 合金的产率分别为 0%、58%和 69%。在 1200°C 和 1500°C 下获得的块状 Al-Si 合金中 Si 的含量分别为 15.8wt%和 17.1wt%。压实原料后，在 1000°C、1200°C 和 1500°C 下获得的块状 Al-Si 合金的产率分别提高到 65%、72%和 79%，相应的块状 Al-Si 合金中 Si 的含量分别提高到 16.0wt%、16.5wt%和 17.3wt%。还研究了合金化过程的反应机理。
