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意大利研究了用硫脲浸出法从金矿(4g/t Au)中提取金的可行性。研究了温度、浸出剂浓度、矿浆浓度和浸出时间对溶金的影响。用活性炭吸附再电积的方法已从母液中回收了金。在实验条件优化后,可获得80％的金总回收率。要达到较高金回收率,硫脲化的过程参数值为pH1;20℃;硫脲浓度100 g/kg;矿浆浓度20％;浸出时间6h。在最佳条件下,试剂消耗较少,即5g/kg硫脲;5g/kg H_2SO_4;0.5g/kg Fe_2(SO_4)_3。按放大每天处理1000 t(相当于每年
Italy studied the feasibility of extracting gold from gold (4 g / t Au) with thiourea leaching. The effects of temperature, leaching agent concentration, pulp concentration and leaching time on the dissolution of gold were studied. Gold has been recovered from the mother liquor by the method of adsorbing re-electrowinning with activated carbon. After the experimental conditions are optimized, a total gold recovery of 80% can be obtained. To achieve a higher gold recovery rate, the value of the thiourea process parameter is pH1; 20 ° C; thiourea concentration 100 g / kg; pulp concentration 20%; leaching time 6 h. Under the optimal conditions, the reagents consumed less, namely 5g / kg thiourea; 5g / kg H_2SO_4; 0.5g / kg Fe_2 (SO_4) _3. Press to zoom in 1000 t per day (equivalent to yearly