This work aims to shed light on the leaching kinetics of antimony from stibnite ore in potassium hydroxide (KOH) solution. Response surface methodology based on central composite design was used to investigate the effect of time, temperature, solid to liquid ratio (S/L), and KOH concentration as independent parameters on the leaching efficiency of antimony. According to the results, time shows the most significant effect on the leaching yield of antimony, followed by temperature. The optimum leaching condition was obtained at a KOH concentration of 0.5 mol/L, temperature of 25°C, S/L of 100 g/L, and time of 133 min, with an antimony leaching yield of 56.5%. Kinetic studies based on the shrinking core model illustrated that the diffusion process through the ash layer is the rate-limiting step, with an activation energy of 4.97 kJ mol⁻¹. Finally, antimony was recovered from the leach liquor in the form of NaSb(OH)₆. This study can pave the way for the development of new hydrometallurgical processes for antimony recovery from the sulfide minerals.

这项工作旨在阐明辉锑矿矿石在氢氧化钾（KOH）溶液中锑的浸出动力学。采用基于中心复合设计的响应面方法研究了时间，温度，固液比（S / L）和KOH浓度作为独立参数对锑浸出效率的影响。根据结果​​，时间对锑的浸出率影响最大，其次是温度。在KOH浓度为0.5 mol / L，温度为25°C，S / L的条件下获得了最佳浸出条件100克/升，时间为133分钟，锑浸出率为56.5％。基于收缩核模型的动力学研究表明，通过灰分层的扩散过程是限速步骤，其活化能为4.97 kJ mol ^-1。最后，从浸出液中以NaSb（OH）₆的形式回收了锑。该研究可为开发新的湿法冶金方法以从硫化物矿物中回收锑铺平道路。