Photovoltaic cutting waste (PCW) is a promising pre-reductant for the enrichment of vanadium and the removal of iron from vanadium slag. However, the dissolution of SiO₂ contained in PCW affects the kinetic conditions and composition of vanadium slag during silicothermic reduction. In the present work, the dissolution behavior of SiO₂ was investigated from 1823 K to 1873 K under FeO concentrations of 37.0 to 11.8 wt pct in FeO–SiO₂–V₂O₃–CaO–MnO–Cr₂O₃–TiO₂ system, that is, the pre-reduction process of vanadium slag. The results show that SiO₂ dissolution in vanadium slag with different FeO contents is a pure dissolution and diffusion process and that no compact product or residual layer is generated. The rate-controlling step of SiO₂ dissolution is the diffusion process, and the main driving force of SiO₂ dissolution is the concentration difference between the slag and the interface of spherical SiO₂ particles. The chemical reaction rate constant and diffusion coefficient of SiO₂ at 1873 K range from 1.60 × 10⁻⁵ to 6.78 × 10⁻⁶ m/s and 3.49 × 10⁻⁸ to 1.52 × 10⁻⁸ m²/s, respectively. The dissolution activation energy of SiO₂ increases from approximately 270.82 to 341.26 kJ/mol.

光伏切割废料（PCW）是一种很有前景的预还原剂，可用于富钒和从钒渣中去除铁。然而，PCW中SiO ₂的溶解会影响硅热还原过程中钒渣的动力学条件和成分。在目前的工作中，在 FeO-SiO ₂ -V ₂ O ₃ -CaO-MnO-Cr ₂ O ₃ -TiO _{2 中}FeO 浓度为 37.0 至 11.8 wt% 时，研究了 SiO ₂从 1823 K 到 1873 K的溶解行为系统，即钒渣的预还原过程。结果表明，SiO ₂在不同FeO含量的钒渣中溶解是纯溶解和扩散过程，不会产生致密的产品或残留层。的SiO的速率控制步骤₂溶解是扩散过程，和SiO的主要驱动力₂溶解是炉渣和球形二氧化硅的界面之间的浓度差₂颗粒。SiO ₂在1873 K的化学反应速率常数和扩散系数范围分别为1.60×10 ^-5至6.78×10 ^-6 m/s和3.49×10 ^-8至1.52×10 ^-8 m ² /s。SiO ₂的溶解活化能 从大约 270.82 增加到 341.26 kJ/mol。