(中南工業(yè)大學(xué)礦物工程系，長沙 410083)
摘 要: 在浮選體系下，藥劑和礦物的作用不僅和鍵合原子有關(guān)，還和礦物表面相鄰原子、藥劑親固基團以及介質(zhì)水分子有關(guān)。在此模型下提出了藥劑親固基團和礦物表面作用能的計算公式，利用這一公式可定量研究礦物表面極性、藥劑分子極性和介質(zhì)水分子對浮選藥劑親固能的影響。研究結(jié)果表明，浮選介質(zhì)分子水影響藥劑和礦物表面作用能的強弱，對于極性較小的礦物（如硫化礦物），其表面和藥劑親固基團的作用能與基團電負性成反比，基團電負性越小，作用越強；對于極性較大的礦物（如非金屬礦物），其表面和藥劑親固基團的作用與基團電負性成正比，基團電負性越大，作用越強。
關(guān)鍵字: 浮選 礦物表面 藥劑基團 親固能
（Department of Mineral Processing Engineering,
Central South University of Technology, Changsha 410083, P. R. China）
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.
Key words: flotation mineral surface function group of reagent solid affinity of reagent
