| 盐酸十八胺在氯化钾浮选中的胶体化学研究 |
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| 引用本文： | 赵静,赵仲鹤,边红利,曹沁波,程芳琴.盐酸十八胺在氯化钾浮选中的胶体化学研究[J].山西大学学报(自然科学版),2012(3):540-545. |
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| 作者姓名： | 赵静 赵仲鹤 边红利 曹沁波 程芳琴 |
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| 作者单位： | 青海省化工设计研究院;青海中航资源有限公司;山西大学资源与环境工程研究所 |
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| 基金项目： | 青海省基础研究(2010-Z-708);青海省高新技术研究与发展计划(2011-G-214A);国家自然科学基金(20906053;51104097) |
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| 摘 要： | 考察了pH值对弱电解质捕收剂盐酸十八胺的影响,确定了盐酸十八胺在超纯水中和饱和氯化钾溶液中的临界胶束浓度(CMC)分别为9×10-4 mol/L,4×10-5 mol/L(298K,pH=6);使用激光粒度仪测定不同浓度下十八胺胶体的体积粒径和数量粒径的变化,对CMC点进行了验证.微浮选实验说明:盐酸十八胺浓度到达CMC点时氯化钾收率高达91.5%,有显著提高;表面性质参数计算结果表明溶液中离子强度越高,胶束形成的自由能变化(ΔG0mic)越小,越容易形成胶团.
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| 关 键 词： | 盐酸十八胺 氯化钾 临界胶束浓度 粒度 浮选 |
Study on Octadecylamine-HCl’s Colloid Chemistry in KCl Flotation |
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| ZHAO Jing,ZHAO Zhong-he,BIAN Hong-li,CAO Qin-bo,CHENG Fang-qin.Study on Octadecylamine-HCl’s Colloid Chemistry in KCl Flotation[J].Journal of Shanxi University (Natural Science Edition),2012(3):540-545. |
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| Authors: | ZHAO Jing ZHAO Zhong-he BIAN Hong-li CAO Qin-bo CHENG Fang-qin |
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| Institution: | 1.Institute of Qinghai Chemical Industry Design and Research,Xining 810008,China; 2.Qinghai Avic Resources Company Limited,Delingha 817000,China; 3.Institute of Resources and Environment Engineering of Shanxi University,Taiyuan 030006,China) |
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| Abstract: | The effect of pH on the activity of octadecylamine was studied.The amine critical micelle concentrations(CMC),which was 9×10-4 mol/L in pure water and 4×10-5 mol/L in saturated brine of KCl(298 K,pH=6) were determined.The volume and number size of micelle were measured by Eye Tech particle size and shape analyzer,which provided basical information for the study of octadecylamine-HCl′s colloid chemistry.The results of microflotation experiment showed that the recovery increased rapidly near the CMC and the recovery could reach 91.5% at CMC.The results of surface properties showed that the higher ionic strength of solution,the lower free energies of micellization,then it was easier to form micelle. |
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| Keywords: | octadecylamine-HCl potassium chloride critical micelle concentration particle size flotation |
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