CAJ | 학술논문

利用单矿物实验，研究了十二胺(DDA)对黄锑矿的浮选行为.研究发现：pH 值为2.0~8.0时，黄锑矿浮选回收率达到90%以上；pH 值为8.0~10.0时，黄锑矿浮选回收率急剧降低；当 pH 值>10.0时，十二胺对黄锑矿几乎没有捕收作用.十二胺浮选溶液化学分析结果表明，十二胺阳离子(DDA +)是对黄锑矿产生捕收作用的主要成分.采用密度泛函理论研究了黄锑矿晶体以及十二胺离子和分子的电子结构性质，考察了十二胺离子、十二胺分子和水分子在黄锑矿表面的吸附行为.三种吸附质在黄锑矿表面吸附能顺序为 DDA > H2 O > DDA +，十二胺离子可排开黄锑矿表面的水化膜，实现黄锑矿的疏水上浮，十二胺离子主要通过物理吸附形式吸附于黄锑矿表面.
이용단광물실험，연구료십이알(DDA)대황제광적부선행위.연구발현：pH 치위2.0~8.0시，황제광부선회수솔체도90%이상；pH 치위8.0~10.0시，황제광부선회수솔급극강저；당 pH 치>10.0시，십이알대황제광궤호몰유포수작용.십이알부선용액화학분석결과표명，십이알양리자(DDA +)시대황제광산생포수작용적주요성분.채용밀도범함이론연구료황제광정체이급십이알리자화분자적전자결구성질，고찰료십이알리자、십이알분자화수분자재황제광표면적흡부행위.삼충흡부질재황제광표면흡부능순서위 DDA > H2 O > DDA +，십이알리자가배개황제광표면적수화막，실현황제광적소수상부，십이알리자주요통과물리흡부형식흡부우황제광표면.
The flotation behavior of cervantite with dodecylamine (DDA) was studied. The results show that the recovery rate of cervantite reaches more than 90% in the pH range of 2. 0 to 8. 0. But it sharply decreases in the pH range of 8. 0 to 10. 0. When pH> 10, DDA has little collecting capacity on cervantite. The flotation solution chemical analysis of dodecylamine indicates that dodecyl-amine cations are the main components of the cervantite collector. The electronic structures of cervantite crystals and dodecylamine ions and molecules were studied using the density functional theory. The adsorption behaviors of dodecylamine ions, dodecylamine mole-cules, and water molecules were simulated. It is found that the adsorption energy order of these adsorbents on cervantite surfaces is DDA > H2 O > DDA + . DDA + can remove hydration films on cervantite surfaces to make cervantite hydrophobic. DDA + adsorbs on cer-vantite surfaces mainly by physical adsorption.