气浮法脱除模拟锌浸出液中的油酸钠

摘要

为了给采用气浮法对锌浸出液进行有机杂质净化提供参考,以φ35 mm×200 mm浮选柱为气浮设备,对Zn2+浓度为45 g/L、油酸钠浓度为2×10-4 mol/L、pH值为5.1的模拟含油酸钠锌浸出液进行气浮净化试验,通过单因素试验和正交试验考察了气浮时间、泡沫层厚度和表观气速对净化效果的影响.结果表明:在气浮时间为6 min、泡沫层厚度为1 cm、表观气速为0.096 cm/s条件下,油酸钠脱除率达到91.69％,Zn2+保留率为92.94％；3个因素中,气浮时间对油酸钠脱除率的影响最显著,表观气速的影响次之,泡沫层厚度的影响相对最弱.%In order to provide a reference to the purification of remove the organic impurities from zinc lixivium by air flotation,the experiments on the simulated zinc lixivium with Zn2+ concentrate of 45 g/L,sodium oleate concentrate of 2 × 10-4 mol/L and pH value of 5.1 were carried out with the flotation column of φ35 mm× 200 mm.The effects of flotation time,thickness of froth layer,superficial gas velocity on purification were investigated through single factor experiments and orthogonality experiments.The results showed that under conditions of the flotation time for 6 min,thickness of the froth layer of 1 cm and superficial gas velocity at 0.096 cm/s,the removal rate of sodium oleate was up to 91.69％,and the retention rate of Zn2+ reached 92.94％.Among these three factors,the air flotation time have the most significant influence on the removal rate,followed by the superficial gas velocity,and the thickness of the froth layer was relatively the least.