Large amounts of Ti-bearing blast furnace slag (TBFS), diamond wire saw Si powder (DWSSP), and Al alloy scrap (AAS) are generated annually. Although these are industrial waste, they contain valuable Ti, Si, and Al resources. In this work, a novel process is developed for the simultaneous recycling of Ti, Si, and Al from these three wastes to prepare TiSi₂ and Al-Si alloys. TBFS, DWSSP, and CaO (flux) were mixed to form a mixed Ti-Si-slag, which was combined with AAS and underwent reduction smelting at 1823K to prepare Si-Ti-Al alloys. Subsequently, TiSi₂ (98.7%) and low-Fe Al-Si (0.64 wt.% Fe) alloys were prepared sequentially by separating the molten Si-Ti-Al melt via electromagnetic directional crystallization with a pull-down rate of 3μm/s. The impurities in the Si-Ti-Al alloy were removed during the separation process by segregation at the boundary of the solid-liquid phase and volatilization. Furthermore, the entire process produces no waste acid or waste gas. Therefore, this work has introduced an efficient and environmentally friendly method for the value-added recycling of Ti, Si, and Al resources from accumulated TBFS, DWSSP, and AAS.

每年都会产生大量含钛高炉渣（TBFS）、金刚石线锯硅粉（DWSSP）和铝合金废料（AAS）。虽然这些是工业废物，但它们含有宝贵的钛、硅和铝资源。在这项工作中，开发了一种从这三种废物中同时回收 Ti、Si 和 Al 以制备 TiSi ₂和 Al-Si 合金的新工艺。将TBFS、DWSSP和CaO（熔剂）混合形成混合Ti-Si熔渣，与AAS结合并在1823K进行还原熔炼以制备Si-Ti-Al合金。随后，TiSi ₂ (98.7%) 和低铁 Al-Si (0.64 通过以3μm/s的下拉速率通过电磁定向结晶分离熔融的Si-Ti-Al熔体，依次制备wt.% Fe)合金。Si-Ti-Al合金中的杂质在分离过程中通过固-液相界面的偏析和挥发而被去除。此外，整个过程不产生废酸或废气。因此，本工作介绍了一种高效、环保的方法，用于从累积的 TBFS、DWSSP 和 AAS 中增值回收 Ti、Si 和 Al 资源。