老挝某难浸金矿石环保浸金实验研究

老挝某金矿矿石类型为蚀变岩型，金为矿石中唯一可回收元素，金属矿物主要为铁的硫化物，部分金包裹在硫化物中，属于较难处理金矿石。针对该矿石开展环保浸金剂浸金实验，获得较佳工艺参数为:原矿金品位为5.47 g/t，磨矿细度-0.074 mm含量90%，矿浆浓度40%，石灰用量3000 g/t，铁氰化钾助浸剂用量600 g/t，碱和助浸剂预处理2 h，金蝉浸金剂用量3000 g/t，浸出时间32 h，金浸出率可以达到93.97%以上。验证实验表明，在较佳工艺条件下，金的浸出率较稳定。 

Experimental Research on Environmental Friendly Gold Leaching of a Refractory Gold Ore in Laos

The gold ore type of the gold mining in Laos is altered rock. Gold is the only recyclable element in the ore. Metal minerals are mainly iron sulfides. Part of the gold is wrapped in sulfide, which belongs to the refractory gold ore. The environmentally friendly gold leaching test was carried out for this ore, and obtain the best process parameters as: under the condition of the ore gold grade of 5.47 g/t, the grinding fineness of -0.074 mm content 90%, slurry concentration 40%, lime dosage 3000 g/t, leaching aid dosage of potassium ferricyanide 600 g/t, pretreatment 2 h after dosing alkali and leaching aid, dosage of Jinchan leaching agent 3000 g/t, leaching time 32 h, the gold leaching rate can be over than 93.97%. At the same time, conditional verification tests show that, under the best process conditions, the gold leaching rate is relatively stable.