闪锌矿与中性浸出渣合并氧压酸浸

硫化锌精矿和由传统流程得到的中浸渣混在一块,对其进行了浸出的小型试验.试验在不同的条件下进行,以考察影响浸出的各种因素,包括浸出温度、浸出时间、氧分压和搅拌速度.试验在一个两升的高压釜内进行.试验结果表明了硫化锌精矿和中浸渣能相到促进浸出,但只有在一定的浸出条件下这种耦合作用才表现得比较明显.研究过程中一些机理也得到了证实.最后为了后面的扩大试验提供了关键的浸出条件:浸出温度135℃;浸出时间2h;氧分压0.8MPa;初始酸度120g/L.

Simultaneous Pressure Oxidation Leaching of Zinc Sulfide Concentrate and Neutral Leaching Residue

Lab-scale simultaneous leaching of zinc sulfide concentrate and neutral leaching residue obtained by traditional roast-leachelectrowin (RLE) were performed in various conditions to investigate leaching variables such as leaching temperature, leaching duration, oxygen partial pressure and stirring rate. Experiments were carried out in a 2-liter autoclave. Experimental results show that zinc sulfide concentrate and the neutral leaching residue help each other to leach in such simultaneous leaching experiments, but the coupling effect occurs obviously only in a given leaching conditions. In this work some mechanisms are proved in the experiments. For the sake of subsequent scaleup experiment,the reasonable condition of simultaneous leaching is given as follows,leaching temperature,135%;leaching duration,2hr;oxygen partial pressure,0.8MPa; initial acidity,120g/l.