Photovoltaic silicon wastes (PVSWs) and Ti-bearing blast furnace slag (TBBFS) are typical new energy solid waste and traditional industrial solid waste respectively. The collaborative treatment of PVSW and TBBFS can realize the utilization of Si and Ti resources, as well as safeguard the ecosystems. Herein, an effective approach was proposed to prepare SiC, TiSiC and TiC using these two wastes as raw materials based on the innovative application of High Temperature Solution Growth Method (HTSGM). A Ti–Si alloy, which is rich in TiSi phase (stable) with a low melting point is synthesized from TBBFS through silicothermal reduction at a low operating temperature of HTSGM. Subsequently, the directional solidification process effectively optimized the segregation and carbon solubility of Ti–Si alloy, leading to the formation of TiC, TiSiC, and SiC. The effect of directional solidification rate and the electromagnetic field is analyzed on in situ carburizing behavior and segregation of Ti–Si alloy, as well as controlled precipitation interval of the three carbides. Through the microcrystalline materialization treatment strategy of the associated waste slag, the entire process is devoid of solid waste or other pollution, achieving high-value and complete utilization of the two solid wastes. This work provides an innovative process for the green, clean, efficient, and high-quality collaborative treatment of PVSW and TBBFS.

中文翻译：

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高温溶液生长法利用光伏硅废料和含钛高炉渣同时制备SiC/Ti3SiC2/TiC的新应用

光伏硅废料（PVSW）和含钛高炉矿渣（TBBFS）分别是典型的新能源固体废物和传统工业固体废物。 PVSW和TBBFS的协同处理可以实现硅钛资源的综合利用，保护生态系统。本文基于高温溶液生长法（HTSGM）的创新应用，提出了以这两种废弃物为原料制备SiC、TiSiC和TiC的有效方法。在 HTSGM 的低工作温度下，通过硅热还原，由 TBBFS 合成了富含 TiSi 相（稳定）的低熔点 Ti-Si 合金。随后，定向凝固过程有效优化了Ti-Si合金的偏析和碳溶解度，导致TiC、TiSiC和SiC的形成。分析了定向凝固速率和电磁场对Ti-Si合金的原位渗碳行为和偏析以及三种碳化物的受控析出间隔的影响。通过伴生废渣的微晶物化处理策略，整个过程无固体废物或其他污染，实现了两种固体废物的高值化和完全利用。该工作为PVSW和TBBFS的绿色、清洁、高效、高质量协同处理提供了创新工艺。