微波强化浸出含铟锌浸渣中铟的非等温动力学研究  

Non-isothermal Kinetics for Microwave-assisted Leaching of Indium from Indium-bearing Zinc-leaching Residues

作　　者：张琳叶[1] 孙勇[1] 刘晓彬[1] 潘柳萍[1] 魏光涛[1] 黎铉海[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《矿冶工程》2014年第6期76-80,共5页Mining and Metallurgical Engineering

基　　金：广西自然科学基金项目(2012GXNSFAA053210);广西大学科研基金项目(XJZ120273);广西大学实验室建设与实验教学改革项目(20120329);广西大学"大学生创新创业训练计划"自治区级创新训练项目(1301045);广西大学大学生实验技能和科技创新能力训练项目(SYJN20120337)

摘　　要：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。Indium was leached from indium-bearing zinc-leaching residues exposed to a constant-power microwave radiation, and the non-isothermal kinetics of leaching reaction was studied as well. According to comparative tests, the leaching rate under microwave heating was higher than that at an elevated temperature in normal programmed system. The effects of sulfuric acid concentration and stirring speed on indium leaching under microwave radiation were studied. The results show that, indium leaching rate climbs along with sulfuric acid concentration and the increase tends to be slow after sulfuric acid concentration exceeds 1.5 mol/L, while the liquid membrane resistance can be eliminated when the stirring speed reaches 400 r/min. For this leaching system, heating rate and temperature are of a non-linear relationship, and the non-isothermal kinetics model for the indium leaching reaction assisted by microwave with the powder in the range of 80-240 W was proposed.

关 键 词：铟 浸出 铁酸锌 微波辐射 非等温动力学 

分 类 号：TF111[冶金工程—冶金物理化学]