活性氧化镁从硫酸盐介质中选择性沉淀镍钴的研究

Study on Selective Precipitation of Nickel and Cobalt from Sulfate Medium with Active Magnesium Oxide

采用活性氧化镁从含锰、镁的硫酸盐介质中选择性沉淀富集镍、钴。结果表明,最佳沉淀条件为:浆化后添加理论量2倍的活性氧化镁,反应停留时间6h,沉淀温度25℃。在该条件下,镍、钴沉淀率分别为97.96%和96.43%,沉淀物中镍、钴、锰和氧化镁含量分别为8.51%、13.05%、2.29%和4.97%,当每立方矿浆添加0.2g絮凝剂AN905时,矿浆平均静态自由沉降速度为180mm/min。

Nickel and cobalt were selectively precipitated and enriched from Mn, Mg containing sulfate me- dium with active magnesium oxide. The results show that the optimum precipitation conditions include twice of theoretical dosage of active magnesium oxide, reaction time of 6 h, and precipitation temperature of 25℃. The precipitation rate of nickel and cobalt is 97.96% and 96.43% respectively. The content of nickel, cobalt, manganese and magnesium oxide in precipitate is 8.51%, 13.05%, 2.29%, and 4. 97% respectively. The average static-state free settling velocity of slurry is 180 mm/min with the dosage of flocculant AN905 of 0.2 g/m3.