超声强化含锌尘泥浸出机理及动力学

采用低共熔溶剂为浸出剂，进行从含锌尘泥超声浸锌试验。分析了超声功率、温度、液固比、搅拌速率、反应时间等对锌浸出率的影响。结果表明：在超声功率90 W、温度40 ℃、液固比7 mL/g、转速250 r/min、浸出时间80 min条件下，锌超声浸出率可达98.48%。超声强化浸出过程受混合固体产物层的控制，表观活化能为11.23 kJ/mol。

Mechanisms and Kinetics of Ultrasonic Enhanced Leaching of Zinc-containing Dust

In this study, a deep eutectic solvent was used as the leaching agent in a pilot study on the ultrasonic leaching of zinc from zinc-containing dust sludge. The impact of ultrasonic power, reaction time, solid-liquid ratio, temperature, and stirring rate was examined on the zinc leaching rate. The results showed that under the conditions of temperature 40°C, ultrasonic power 90 W, solid-liquid ratio 1:7, rotating speed 250 r/min, and leaching time 80 min, the ultrasonic leaching rate of zinc could reach 98.5%. Based on the leaching results, the kinetic equation of ultrasound-enhanced leaching was developed. In the kinetic analysis of ultrasonically enhanced leaching of Zn-containing dust sludge, the apparent activation energy of the reaction was 11.2 kJ/mol, indicating that the mixed solid product layer controls the ultrasonically enhanced leaching process.