研究了从载金炭上解吸金的新工艺———乙醇蒸馏解吸法的基本原理及工艺条件。研究结果表明，该工艺最佳解吸条件：液固比为２∶１；载金炭经过含有乙醇５０％、氢氧化钠４％的预处理液，加热到８０℃，预处理３ｈ；再经５０％的乙醇液，温度８０℃预浸１ｈ；最后在８０℃蒸馏回流４ｈ。解吸后的尾炭金品位在１００ｇ／ｔ以下，金的解吸率可超过９８％，整个净解吸过程约８～９ｈ。该新工艺已在全国推广应用多年。 The basic principle and process conditions of ethanol desorption were studied. The results show that the optimum desorption conditions are as follows: the liquid-solid ratio is 2: 1; the carbon-carrying carbon is pretreated by pretreatment solution containing 50% ethanol and 4% sodium hydroxide, heated to 80 ℃ for 3h; % Ethanol solution, pre-soaked at a temperature of 80 ° C for 1 h; and finally refluxed at 80 ° C for 4 h. Desorption of the tail carbon gold grade below 100g / t, the desorption rate of gold can be more than 98%, the entire net desorption process of about 8 ~ 9h. The new technology has been applied in the country for many years.