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研究硅酸锌在氯化铵溶液中的浸出动力学,讨论搅拌速度(150~400 r/min)、浸出温度(95~108°C)、硅酸锌粒度(61~150μm)以及氯化铵浓度(3.5~5.5 mol/L)对锌浸出率的影响。结果表明,减小硅酸锌粒度、提高浸出温度和氯化铵浓度可以显著地提高锌的浸出率。在多孔颗粒的动力学模型中,颗粒模型的孔隙扩散控制能很好地描述锌的浸出动力学。浸出反应的表观活化能为161.26 k J/mol,氯化铵的反应级数为3.5.
The kinetics of zinc silicate leaching in ammonium chloride solution was studied. The effects of stirring speed (150-400 r / min), leaching temperature (95-108 ° C), particle size of zinc silicate (61-150 μm) and ammonium chloride Effect of Concentration (3.5 ~ 5.5 mol / L) on Leaching Rate of Zinc. The results show that reducing the zinc silicate particle size, raising the leaching temperature and ammonium chloride concentration can significantly improve the leaching rate of zinc. In the kinetic model of porous particles, the pore diffusion control of the particle model can well describe the leaching kinetics of zinc. The apparent activation energy of the leaching reaction was 161.26 kJ / mol and the reaction order of ammonium chloride was 3.5.