一、引言在国内外选矿工艺中,由于氰化物易与某些金属元素形成不同形式的络合物,因而常被用作浮选的抑制剂和金银提取的浸出剂。然而,氰化物系选矿“三废”中五大毒物之一,因此随着氰化物的应用,势必对生态环境带来程度不同的威胁。为了防治和控制氰化物的使用所造成的环境污染,选矿工作者及环保工作者曾对选厂 I. INTRODUCTION In the beneficiation process at home and abroad, cyanide is often used as a flotation inhibitor and as a leaching agent for gold and silver extraction due to the easy formation of different forms of complex with certain metal elements. However, cyanide is one of the five poisons in the “three wastes” of beneficiation. Therefore, with the application of cyanide, it is bound to bring about different degrees of threat to the ecological environment. In order to prevent and control the environmental pollution caused by the use of cyanide, beneficiation workers and environmental workers once selected the plant