Heavy metal control is essential during the thermochemical recovery of phosphorus (P) from sewage sludge ash (SSA). For medium volatile heavy metals, i.e. Cu and Zn, the effect of chlorine additive was complicated and more sensitive to temperature variation. So, in the in-depth study on the removal kinetics of Cu and Zn was necessary. Thus, the studies described in this paper considered the experiments and kinetic models of Cu and Zn removal in SSA through calcination under different atmospheres and temperatures. The results showed that within 15 minutes, the removal of Cu and Zn was more effective at the same temperature in air than in N₂. The result is consistent with kinetic analysis: Reaction activation energy of both Cu and Zn in an air atmosphere is lower than in N₂. In addition, the reaction orders, energy and frequency factors of Cu and Zn removal reaction during SSA calcination at high temperature with air and N₂ atmosphere were calculated.

在从污水污泥灰（SSA）中热回收磷（P）的过程中，重金属的控制至关重要。对于中等挥发性的重金属，例如铜和锌，氯添加剂的作用复杂且对温度变化更为敏感。因此，在深入研究铜和锌的去除动力学上是必要的。因此，本文描述的研究考虑了在不同气氛和温度下通过煅烧去除SSA中的Cu和Zn的实验和动力学模型。结果表明，在15分钟内，在相同温度下在空气中去除Cu和Zn比在N _2中更有效。结果与动力学分析一致：空气中Cu和Zn的反应活化能均低于N _2中的活化能。。此外，计算了在高温下空气和N ₂气氛下SSA煅烧过程中Cu和Zn去除反应的反应顺序，能量和频率因子。