硫代硫酸盐法添加氯化钠和十二烷基磺酸钠浸取金矿

LEACHING GOLD WITH THIOSULPHATE SOLUTION CONTAINING ADDED SODIUM CHIORIDE AND SODIUM DODECYL SULPHONATE

对湖北氧化铁型金矿进行了Ｎａ２Ｓ２Ｏ３法添加ＮａＣｌ而不加Ｃｕ２＋的浸取条件优化研究，当［Ｓ２Ｏ２－３］＝０．８ｍｏｌ／Ｌ、［ＮＨ３］＝１～２ｍｏｌ／Ｌ、［ＮａＣｌ］＝１．０ｍｏｌ／Ｌ、浸取温度５０℃、浸取时间为３ｈ时，浸出率达到９８％．对广东河台、山东招远硫化金矿进行了浸取研究，当［Ｓ２Ｏ３２－］＝０．８ｍｏｌ／Ｌ、［ＮＨ３］＝２ｍｏｌ／Ｌ、［ＮａＣｌ］＝１．０ｍｏｌ／Ｌ、十二烷基磺酸钠１１．０ｍｏｌ／Ｌ、浸取温度５０℃、浸取时间３ｈ时，浸取率分别达到９６％和９３％．

The optimization of conditions of leaching gold from oxide ore in Hubei province with thiosulphate solutions containing added NaCl and no Cu+ has been explored The leached fraction of gold can go up to 98% with solution of [S2O32-]=08mol/L, =1～2mol/L, =10mol/L at 50℃ for 3h Two sulphide concentrates from Shandong and Guangdong provinces are tested, and the leaching percentage can go up to 96% and 93% respectively with the solution of [S2O32-]=08mol/L, =1～2mol/L, =10mol/L, sodium dodecyl sulphonate 110 mmol/L at 50℃ for 3h