富银低品位锰矿和闪锌矿的联合氧压酸浸(英文)

Simultaneous Acid Pressure Leaching of Silver-bearing Low-grade Manganese Ore and Sphalerite Concentrate

进行了硫化锌和含银低品位锰矿联合氧压酸浸的小型试验,以考察影响浸出的各种因素,诸如浸出温度、浸出时间、氧分压和搅拌速度。实验在2L的高压釜内进行。实验结果表明,硫化锌和含银低品位锰矿能相互促进浸出,但这种耦合作用须在一定条件下才会起作用。作者对一些浸出做了探讨。为下一步扩大试验的需要,本文给出了合理的浸出条件:浸出温度,110℃;浸出时间,2h;氧分压,0.6MPa;硫酸用量,1.2倍理论用量。

Lab - scale simultaneous acid pressure leaching of sphalerite concentrate and silver - bearing low -grade manganese ore was performed under various conditions to investigate leaching variables, such as leaching temperature, leaching duration, oxygen partial pressure and stirring rate. Such experiments were carried out in a 2 liter autoclave. Experimental results show that sphalerite concentrate and silver - bearing low - grade manganese ore help each other to leach in the simultaneous leaching experiments, but the coupling effect occurs obviously only under given leaching conditions. In this work some leaching mechanisms were proved in the experiments. For the sake of subsequent scale - up experiment, the reasonable conditions of simultaneous leaching are given as follows： leaching temperature, 135℃ ; leaching duration, 2h; oxygen partial pressure, 0. 6MPa; sulfuric acid usage, 1.2.