The partial reduction of zinc ferrite to zinc oxide and iron (II, III) oxide can enhance the leaching rate of zinc. Zinc ferrite has often been found as a major component of zinc residues and electric arc furnace dust. The Waelz process is an existing process for zinc ferrite processing, which requires a temperature of more than about 1200 °C to produce Waelz oxide containing ZnO. Since zinc residues have been deemed as a potential way for the extraction of zinc and other critical metals, it is important to analyze the reaction kinetics in the temperature range of interest. This manuscript discusses the chemical kinetics of zinc ferrite reduction by hydrogen gas. Several researchers studied the reduction of zinc ferrite with CO; however, unlike CO, the use of H₂ gas as a reductant allows partial reduction of zinc ferrite even at low-temperature range (400–600 °C). Thermogravimetric analyses (TGA) experiments were performed in the temperature range of 300–700 °C with 10% and 30% H₂, and the data obtained was analyzed using the isoconversional method of kinetic analyses. The standard models used for isoconversional kinetic analysis were chosen from literature and experimental data were fitted to determine the controlling mechanism and calculation of kinetic parameters of reduction of zinc ferrite. The rate of reaction was found to be increasing with an increase in temperature and partial pressure of H₂ gas. The reaction could be divided into three stages, where reaction interface contraction was found to be the controlling mechanism at the initial stage of reaction. As the reaction proceeds, product layer thickness increases, and thus, diffusion was found to be the controlling mechanism. Roasting products obtained from TGA experiments were also characterized using a scanning electron microscope (SEM) to verify critical morphological details.

铁酸锌部分还原为氧化锌和氧化铁（II，III）可以提高锌的浸出率。经常发现锌铁氧体是锌渣和电弧炉粉尘的主要成分。Waelz工艺是现有的铁氧体锌加工工艺，需要约1200℃以上的温度才能生产出含有ZnO的Waelz氧化物。由于锌残留物已被认为是提取锌和其他关键金属的潜在方法，因此在感兴趣的温度范围内分析反应动力学非常重要。该手稿讨论了氢气还原铁酸锌的化学动力学。一些研究人员研究了用 CO 还原铁酸锌；然而，与 CO 不同的是，使用 H ₂气体作为还原剂即使在低温范围（400-600°C）也可以部分还原铁酸锌。热重分析 (TGA) 实验在 300–700 °C 的温度范围内进行，10% 和 30% H ₂，并使用动力学分析的等转化方法分析获得的数据。从文献中选择用于等转化动力学分析的标准模型，并拟合实验数据以确定铁酸锌还原的控制机制和动力学参数的计算。发现反应速率随着温度和 H _{2分压的增加而增加}气体。反应可分为三个阶段，发现反应界面收缩是反应初期的控制机制。随着反应的进行，产物层厚度增加，因此发现扩散是控制机制。还使用扫描电子显微镜 (SEM) 对从 TGA 实验获得的烘焙产品进行了表征，以验证关键的形态细节。