硫化钼镍矿中镍的强化浸出工艺研究

通过焙烧—水浸实现原生硫化镍钼矿中镍和钼的分离,并对得到的氧化镍渣进行强化浸出工艺研究,考察酸的种类、配比、浸出温度、液固比、浓度、超声波以及添加剂等工艺因素对镍浸出率的影响。得到的较优工艺条件为:原矿和无水碳酸钠质量比1∶0.9,560℃焙烧6 h,650℃焙烧1.5 h,焙砂中镍品位为2.67%、回收率为96.70%,钼品位为3.50%、回收率为99.85%;在液固比4∶1,温度95℃的条件下,水浸焙烧渣2 h,99.70%的镍留在滤渣中,95.43%的钼进入滤液,有效地实现了钼和镍的分离;在液固比为6∶1、浸出温度95℃、超声波振荡、浸出时间为6 h、硫酸浓度为15%和加入0.5 g添加剂条件下,镍渣中镍的浸出率为79.80%。

STUDY ON INTENSIFIED LEACHING OF NICKEL IN Mo-Ni SULFIDE ORES

Separation of nickel and molybdenum in primary sulfide nickel and molybdenum ores is realized by roasting-water leaching,and intensified leaching process study is done to obtained nickel dioxide slag to investigate the influence of process factors such as acid type,portioning,leaching temperature,solid-liquid ratio,concentration,ultrasonic,additive dosage and etc.on nickel leaching rate.The results of experiments show that the recovery rates of nickel and molybdenum are 96.70% and 99.85 % respectively durin...