浮选药剂的亲固能计算

来源期刊：中国有色金属学报1999年第2期

论文作者：陈建华 冯其明 卢毅屏

文章页码：351 - 357

关键词：浮选 矿物表面 药剂基团 亲固能

Key words：flotation ; mineral surface ; function group of reagent ; solid affinity of reagent

摘    要：在浮选体系下，药剂和矿物的作用不仅和键合原子有关，还和矿物表面相邻原子、药剂亲固基团以及介质水分子有关。在此模型下提出了药剂亲固基团和矿物表面作用能的计算公式，利用这一公式可定量研究矿物表面极性、药剂分子极性和介质水分子对浮选药剂亲固能的影响。研究结果表明，浮选介质分子水影响药剂和矿物表面作用能的强弱，对于极性较小的矿物（如硫化矿物），其表面和药剂亲固基团的作用能与基团电负性成反比，基团电负性越小，作用越强；对于极性较大的矿物（如非金属矿物），其表面和药剂亲固基团的作用与基团电负性成正比，基团电负性越大，作用越强。

Abstract: The interaction of flotation reagent with mineral surface is not only related to bonding atom, but also related to the adjacent atom of mineral surface, radical of reagent and medium of flotation. The energy equation of the interaction of reagent with mineral surface has been deduced from the model. The ef fects of the polarity of mineral surface, reagent molecule and mediu m (water molecule) on solid affinity of reagent can be quantitatively studied by analyzing energy equation. The study results indicated that, the water molecule can affect the interaction energy of reagent radical with mineral surface; the solid affinity of reagent is an inverse measure of the eletronegativity of group for weak polarity mineral (such as sulfide mineral), namely the interaction of group with mineral surface will be strengthened with the decrease of the eletronegativity of group; the solid affinity of reagent is direct proportion to the eletronegativity of group for strong polarity minera l (such as oxide mineral), namely the interaction of group with mineral surface will be strengthened with the increase of the eletronegativity of group.