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氰化提金工艺已有百余年的历史,直到现在仍是普遍采用的主要提金工艺,但是其贫液含剧毒氰化物(200～1500毫克/升),直接排放污染环境,造成极大的危害.为克服上述工艺的不足,提出了贫液返回工艺(即贫液不外排而直接返回到氰化浸出槽循环)见图1.但此法并没有被广泛采用,据称,其主要原因是“贫液中积累起来的杂质组份对氰化浸出率有坏的影响”,事实说明不完全是这样.
Cyanidation gold extraction process has been a hundred years of history, until now is still commonly used in the main gold extraction process, but the lean liquid containing highly toxic cyanide (200 ~ 1500 mg / l), the direct discharge of polluting the environment, resulting in extremely Great harm to overcome the above process deficiencies, proposed lean liquid return process (ie lean liquid is not discharged and returned directly to the cyanide leaching tank cycle) shown in Figure 1. However, this method has not been widely used, The main reason is that “the accumulation of impurity components in lean solution has a bad effect on the rate of cyanidation leaching”, which is not exactly the case.