【摘要】 经过改性的腐殖酸对多种含金矿石的浸金效果与氰化法相当，但是没有污染和毒害。我们用多种后处理方法如活性炭吸附法、溶剂萃取法、酸沉淀法、离子交换法等从腐殖酸浸金液中回收金，其中离子交换法的效果最好。从含腐殖酸金的树脂解吸金很困难，我们采用多种解吸剂进行了含腐殖酸金的树脂的解吸实验，找到一种最合适的解吸剂-硫脲，但解吸之前必须对载金树脂用稀盐酸溶液处理。实验研究了解吸时间、解吸温度、硫脲浓度、液固比及预处理过程对解吸率的影响。解吸速度随着解吸时间、解吸温度、硫脲浓度、液固比的增加而加快。其中解吸温度对解吸过程的影响最大，在40℃时金的解吸率只有52％，而到80℃时，金的解吸率达到95％。更多还原

【Abstract】 Gold leaching with denatured humic acid is a new technology which is cheapand poisonless to thde environment. Many methods such as activated carbon adsorption, solvent extraction, ion exchange, precipitation etc. have been applied to recover gold from humic acid leaching solutions. Ion exchange with strongly basic anion resin (type D201) is considered to be the most successful method for gold recovery. But removing the adsorbed gold from resin is very difficult. Several chemicalsolutions have been used to desorb humic acid-gold. Thiourea solution is found tobe the most effective one, but the ion exchange resin loaded with humic acid-goldmust be pretreated with dilute HCl solution before desorption. The influence on therate of gold desorption of a number of parameters such as time, temperature, theconcentration of thiourea solution, the pretreatment process and the solution toresin mass ratio have been examined. The desorption rate increases as temperature,thiourea concentration or the solution to resin mass ratio increases. The influence oftemperature on the desorption process is very strong. At 40℃, recovery rate is52 % while at 80℃ the recovery rate reaches 95 %.更多还原