黄药在毒砂和黄铁矿表面吸附的研究

Study on the Adsorption of Xanthate on Arsenopyrite and Pyrite Surfaces

研究了毒砂和黄铁矿表面吸附黄药的过程。结果表明,黄药在毒砂和黄铁矿表面起初化学吸附于表面活性点(金属离子)上,而后迅速转化成双黄药。双黄药具有较高的吸附强度,和矿物表面有键合作用,但对于黄铁矿和毒砂来说,键合状态有差别。仅黄药的吸附量约大于一个单分子层后,双黄药才以物理吸附形式存在。

The adsorption process of xanthate on the surfaces of arsenopyrite and py-rite was studied.The results show that initially the xanthate adsorbs chemically on the surficially active sites, i.e.the metallic ions, then rapidly converts into dixanthogen of which an adsorption intensity is higher than that of xanthate and a bonding effect with mineral surface ions attainable. However, binding conditions of pyrites differ from those of arsenopyrites. The dixanthogen will take the form of physical adsorption on the mineral surfaces only if the adsorption amount of xanthate exceeds about a monomolecular layer.