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本文研究了黄金生产过程中从载金炭上解吸金的一种新工艺——乙腈蒸馏解吸法的基本原理及工艺条件。结果表明，该工艺最佳解吸条件为：液固比为4：1，载金发经过含有50％乙腈0．5％氢氧化钠的预处理液，加热至75℃预处理2h；再经50％的乙腈液75℃预浸1h；最后在80℃蒸馏回流2h。解吸后的金的尾炭品位在50g/t以下，金的解吸率可达到99％以上，整个解吸过程约5—6h。与其它有机溶剂相比，乙腈蒸馏解吸法具有时间短、温度低、解吸率高的特点。
In this paper, a new process of desorption of gold from gold-loaded carbon in gold production process is studied-the basic principle and process conditions of acetonitrile distillation and desorption. The results showed that the optimal desorption conditions were as follows: the liquid to solid ratio was 4: 1, and the suspension was pretreated with 50% acetonitrile 0.5% sodium hydroxide and heated to 75 ℃ for 2h. After 50% Acetonitrile pre-soaked for 1 h at 75 ° C; and finally refluxed at 80 ° C for 2 h. Desorbed gold tail carbon grade 50g / t or less, the desorption rate of gold can reach more than 99%, the entire desorption process of about 5-6h. Compared with other organic solvents, acetonitrile distillation and desorption method has a short time, low temperature, high desorption rate characteristics.