Utilization of wastewater from zeolite production in synthesis of flotation reagents  

分子筛生产废水在浮选药剂合成中的应用

作　　者：Xu WANG Hao SONG Fen JIAO Wen-qing QIN Cong-ren YANG Yan-fang CUI Zheng-quan ZHANG Jian ZHANG Hao-bing LI 王旭;宋灏;焦芬;覃文庆;杨聪仁;崔艳芳;张政权;张健;李浩兵(中南大学资源加工与生物工程学院,长沙410083;中南大学战略含钙矿物资源清洁高效利用湖南省重点实验室,长沙410083;洛阳振北工贸有限公司,洛阳471000;College of Engineering,Drexel University,Philadelphia,PA 19102,USA;洛阳豫鹭矿业有限责任公司,洛阳471000)

机构地区：[1]School of Mineral Processing and Bioengineering,Central South University,Changsha 410083,China [2]Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources,Central South University,Changsha 410083,China [3]Luoyang Zhenbei Industry and Trade Co.,Ltd.,Luoyang 471000,China [4]College of Engineering,Drexel University,Philadelphia,PA 19102,USA [5]Luoyang Yulu Mining Co.,Ltd.,Luoyang 471000,China

出　　处：《Transactions of Nonferrous Metals Society of China》2020年第11期3093-3102,共10页中国有色金属学报（英文版）

基　　金：Projects(51604302,51574282)supported by the National Natural Science Foundation of China;Project(2016RS2016)supported by the Provincial Science and Technology Leader(Innovation Team of Interface Chemistry of Efficient and Clean Utilization of Complex Mineral Resources),China;Project(2018zzts224)supported by the Postgraduate Independent Exploration and Innovation Project of Central South University,China;Project(2018TP1002)supported by the Key Laboratory of Hunan Province for Clean and Efficiency Utilization of Strategic Calcium-containing Mineral Resources,China。

摘　　要：The application of waste alkali liquids as a substitute of sodium hydroxide for the saponification to improve the collection performance of fatty acids was investigated by saponification reaction test and flotation test.The results of the saponification reaction test indicated that the optimal conditions for the saponification were stirring rate of 55 r/min,initial temperature of 40℃ and stirring time of 45 min.Meanwhile,the laboratory scale and industrial scale flotation experiments showed that the fatty acid salt synthesized by wastewater achieved an index comparable to fatty acid sodium synthesized by sodium hydroxide.As a consequence,it was feasible to replace sodium hydroxide with the wastewater from zeolite production for fatty acid saponification.The cross-border utilization of waste alkali liquids not only reduced environmental pollution,but also produced excellent economic benefits.通过皂化反应试验和浮选试验,对废碱液作为氢氧化钠的替代品用于皂化,改善脂肪酸的捕收性能的应用进行研究。皂试验结果表明,皂化反应的最佳条件为:搅拌速度55 r/min、起始温度40℃和搅拌时间45 min。同时,实验室规模和工业规模的浮选试验表明,废水合成的脂肪酸盐得到与氢氧化钠合成的脂肪酸钠相当的指标。因此,用来自分子筛生产过程中产生的废水代替氢氧化钠用于脂肪酸皂化是可行的。废碱液的跨界利用不仅减少环境污染,同时还产生良好的经济效益。

关 键 词：ZEOLITE WASTEWATER fatty acid SAPONIFICATION FLOTATION SCHEELITE 

分 类 号：X703[环境科学与工程—环境工程] TD923.1[矿业工程—选矿]