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 kJ/mol，氯化铵的反应级数为3.5.
The leaching kinetics of zinc silicate in ammonium chloride solution was investigated. The effects of stirring speed (150?400 r/min), leaching temperature (95?108 °C), particle size of zinc silicate (61?150 μm) and the concentration of ammonium chloride (3.5?5.5 mol/L) on leaching rate of zinc were studied. The results show that decreasing the particle size of zinc silicate and increasing the leaching temperature and concentration of ammonium chloride can obviously enhance the leaching rate of zinc. Among the kinetic models of the porous solids tested, the grain model with porous diffusion control can well describe the zinc leaching kinetics. The apparent activation energy of the leaching reaction is 161.26 kJ/mol and the reaction order with respect to ammonium chloride is 3.5.
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