为了考查用铜、镉、银离子活化人工合成闪锌矿时矿物表面的交换特性，测定了金属离子的加入量和接触时间的影响．吸附的化学计算法表明，闪锌矿的活化包括一个简单的离子交换反应和一个氧化还原过程，在后一过程中，活化的离子及氧被还原，这种混合的硫化物表面被氧化产生了元素硫和一个金属离子缺陷硫化物表面．未经活化的闪锌矿显示出相当的亲水性，浮选五分钟的回收率通常低于20％,而活化后的闪锌矿不使用传统的捕收剂也能容易上浮．经活化了的闪锌矿的这种内在可浮性过去认为与金属离子缺陷的硫化物层的形成有关，然而，本研究着重表面氧化过程的意义． In order to examine the exchange characteristics of the mineral surface when activated synthetic sphalerites were made of copper, cadmium and silver ions, the influence of the addition amount of metal ions and the contact time was examined. Adsorption stoichiometry shows that the activation of sphalerite involves a simple ion exchange reaction and a redox process in which the activated ions and oxygen are reduced and the mixed sulfide surface is oxidized Elemental sulfur and a metal ion-deficient sulfide surface. Unactivated activated sphalerite shows considerable hydrophilicity. The flotation recovery for five minutes is usually less than 20%, whereas the activated sphalerite can be easily floated without the use of conventional collectors. This intrinsic flotability of activated sphalerite was previously thought to be related to the formation of sulfide-defects in metal ions, however, the present study focuses on the significance of surface oxidation processes.