氨浸取粗氧化锌粉中锌的工艺研究

摘要

A technical process for production of active zinc oxide from crude zinc oxide by leaching method were introduced. The crude zinc oxide as a raw material and ammonia complex as leaching-solvent, some factors influencing the effect of leaching ratio including reaction time, temperature, liquid-solid ratio, amounts of ammonium acid carbonate hydrogen peroxide were investigated through single factor optimizing tests. Based on the studies, the best process conditions were obtained after orthogonal tests of some important factors, that is: temperature 40℃, reaction time 3 h, liquid-solid ratio 70 g/mL, amounts of ammonium acid carbonate hydrogen peroxide 2.5 g. The leaching rate of zinc oxide is 92%.%研究以粗氧化锌为原料制取活性氧化锌的浸取工艺。采用氨配合法将粗氧化锌中的锌充分浸取，以低级氧化锌为原料，对固液比、反应时间、碳酸氢铵用量、反应温度等因素先进行单因素实验，考察对氨配合法浸取率的影响，并在此基础上对主要的影响因素进行正交实验，从而优化出最佳浸取工艺条件为：浸取温度40℃，浸取时间3h，固液比70g／mL，碳酸氢铵用量2．5g，浸取率可达92％。