N-丁氧基丙基-S-[2-(肟基)丙基]二硫代氨基甲酸酯对黄铜矿的浮选行为及吸附机理

来源期刊:中国有色金属学报2021年第8期

论文作者:肖静晶

文章页码:2247 - 2258

关键词:N-丁氧基丙基-S-[2-(肟基)丙基]二硫代氨基甲酸酯;黄铜矿;浮选;吸附机理

Key words:BOPHPDT; chalcopyrite; flotation; adsorption mechanism

摘    要:考察了N-丁氧基丙基-S-[2-(肟基)丙基]二硫代氨基甲酸酯(BOPHPDT)对黄铜矿的浮选行为,研究其与八种金属离子的作用,采用微浮选、接触角、原位电化学扫描(SECM)、X射线光电子能谱(XPS)对BOPHPDT浮选黄铜矿的吸附机理进行研究。结果表明:BOPHPDT对黄铜矿的浮选优于丁黄药,优选pH值范围为4~10,其吸附于黄铜矿表面增大其接触角,增强其表面疏水性。XPS分析进一步表明,BOPHPDT分别通过其分子中NH—C=S和C=N—OH官能团与黄铜矿表面形成Cu—N、Cu—S和Cu—O键化学吸附于黄铜矿表面。

Abstract: The flotation behavior of N-butoxypropyl-S-[2-(hydroxyimino) propyl] dithiocarbamate ester (BOPHPDT) to chalcopyrite was investigated, the interactions between BOPHPDT and eight metal ions were researched, and the adsorption mechanism of BOPHPDT to chalcopyrite was studied by employing micro-flotation, contact angle, in-situ SECM, XPS. The results demonstrate that BOPHPDT exhibits superior flotation performance for chalcopyrite in comparison with xanthate and the preferable pH values for its attachment to chalcopyrite surfaces are from 4 to 10, and it adsorbs on chalcopyrite surface to increase its contact angle and enhance its surface hydrophobicity. XPS further elucidates that BOPHPDT might be chemisorption to chalcopyrite surface through its NH—C=S and C=N—OH groups to form Cu—N, Cu—S and Cu—O bonds, respectively.

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