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研究了恒功率微波辐射下从含铟锌浸渣中酸浸铟的非等温动力学。对比实验表明,恒功率微波辐射条件下铟浸出率高于常规程序升温条件下的铟浸出率。考察了微波辐射下硫酸浓度、搅拌速度对铟浸出率的影响,结果表明,随硫酸浓度增加,铟浸出率提高,但当硫酸浓度超过1.5 mol/L后,铟浸出率的增加变得相当缓慢;搅拌速度为400 r/min时,基本消除了浸出反应的液膜阻力。微波酸浸体系的升温速率与温度的关系为非线性关系,得出了微波功率为80~240 W范围内铟浸出反应的非等温动力学模型。
The non-isothermal kinetics of pickling indium from indium-containing zinc leaching residues under constant power microwave irradiation was studied. The comparative experiments show that the indium leaching rate under constant power microwave irradiation is higher than that of indium leaching under the normal temperature programmed conditions. The effect of sulfuric acid concentration and stirring speed on the leaching rate of indium under microwave irradiation was investigated. The results show that the leaching rate of indium increases with the increase of sulfuric acid concentration. However, when the sulfuric acid concentration exceeds 1.5 mol / L, the increase of indium leaching rate becomes quite slow ; Stirring speed of 400 r / min, the basic elimination of the leaching reaction of the liquid film resistance. The relationship between the heating rate and the temperature of the microwave acid leaching system is non-linear, and the non-isothermal kinetic model of the indium leaching reaction with microwave power ranging from 80 to 240 W is obtained.