An improved method of (NH₄)₂SO₄ roasting followed by water leaching to utilize zinc oxidized ores was studied. The operating parameters were obtained by investigating the effects of the molar ratio of (NH₄)₂SO₄ to zinc, roasting temperature, and holding time on zinc extraction. The roasting process followed the chemical reaction control mechanism with the apparent activation energy value of 41.74 kJ·mol⁻¹. The transformation of mineral phases in roasting was identified by X-ray diffraction analysis combined with thermogravimetry-differential thermal analysis curves. The water leaching conditions, including the leaching temperature, leaching time, stirring velocity, and liquid-to-solid ratio, were discussed, and the leaching kinetics was studied. The reaction rate was obtained under outer diffusion without product layer control; the values of the apparent activation energy for two stages were 4.12 and 8.19 kJ·mol⁻¹. The maximum zinc extraction ratio reached 96% while the efficiency of iron extraction was approximately 32% under appropriate conditions. This work offers an effective method for the comprehensive use of zinc oxidized ores.

研究了一种改进的（NH ₄）₂ SO ₄焙烧然后水浸以利用氧化锌矿石的方法。通过研究（NH ₄）₂ SO ₄与锌的摩尔比，焙烧温度和保持时间对锌萃取的影响来获得操作参数。焙烧过程遵循化学反应控制机理，表观活化能值为41.74 kJ·mol ^-1。通过X射线衍射分析结合热重分析-差示热分析曲线确定了焙烧过程中矿物相的转变。讨论了水的浸出条件，包括浸出温度，浸出时间，搅拌速度和液固比，并研究了浸出动力学。反应速率是在没有产品层控制的情况下在外部扩散下获得的；两个阶段的表观活化能分别为4.12和8.19 kJ·mol ^-1。在适当的条件下，最大的锌提取率达到96％，而铁的提取效率约为32％。这项工作为综合利用氧化锌矿提供了有效的方法。