云南某锰银矿特征及湿法分离实验研究

对云南某锰银矿的主要化学组成及矿石结构特征进行了研究, 选用硫酸亚铁作还原剂对银锰湿法分离进行了实验研究。结果表明: 当磨矿细度为-0.074 mm粒级占70%~80%, 硫酸初始浓度为250 g/L, 硫酸亚铁加入量为理论值的1.1倍, 液固比为5∶1, 90 ℃恒温水浴中反应2 h时, 锰浸出率达89%, 银损失率小于1%, 可较好分离银与锰。

Characteristics and Hydrometallurgical Processing of Manganese-Silver Ore from Yunnan

Based on the studies of chemical compositions and ore texture of manganese-silver ore from Yunnan Province, experiments were carried out on the hydrometallurgical method with ferrous sulfate as reductant, for separating manganese and silver from manganese-silver ore. With a grinding fineness of -0.074 mm 70%~80%, the initial sulfuric acid concentration of 250 g/L, addition of ferrous sulfate 1.1 times as much as the theoretical value, liquid/solid ratio at 5∶1, the leaching experiment was carried out in a constant temperature water bath at 90 ℃ for 2 h, resulting in a good separation between silver and manganese, with manganese leaching rate up to 89% and loss rate of silver less than 1%.