混合捕收剂浮选分离锂辉石与长石及其机理
Flotation separation of spodumene from feldspar with mixed collectors and its mechanism
摘要
Abstract
The flotation separation and adsorption mechanism of spodumene from feldspar using the mixed anionic/cationic collector (NaOL-DDA) were investigated through the microflotation experiments, Zeta potential technique,solution chemistry of mixed collectors and Fourier transform infrared (FT-IR) analyses. The results indicate that the mixed collectors exhibit excellent flotation separation performance of spodumene from feldspar. When the molar ratios of NaOL to DDA is 6:1?10:1, the mixed collectors can realize the spodumene recovery of 85% and the feldspar recovery of 25% at pH 8.5. The existent forms of mixed collector in solution has a great relationship with the pH, and it is the form of molecular-ion complex for the flotation optimal pH=8.5. The molecular-ion complexes have selective adsorption on spodumene and feldspar. In solution, the electrokinetic potentials of and feldspar treated by the mixed collectors are between dodecyl amine and sodium oleate, indicating the adsorption of two components of mixed collector on the minerals. And zeta potential of spodumene treated by the mixed collectors shifted significantly more negatively than that of feldspar, which meaning that the adsorption amount of mixed collector on spodumene surface was significantly greater than on feldspar surface. That is, it can achieve the selective flotation separation of spodumene from feldspar.关键词
锂辉石/长石/阴阳离子混合捕收剂/浮选Key words
spodumene/feldspar/mixed cationic/anionic collectors/flotation分类
矿业与冶金引用本文复制引用
田佳,徐龙华,邓伟,易发成,巫侯琴,刘璟,王振..混合捕收剂浮选分离锂辉石与长石及其机理[J].中南大学学报（自然科学版）,2018,49(3):511-517,7.基金项目
国家自然科学基金资助项目(51674207,51741408,51304162) （51674207,51741408,51304162）
矿物加工科学与技术国家重点实验室开放研究基金资助项目(BGRIMM-KJSKL-2016-03) （BGRIMM-KJSKL-2016-03）
四川省教育厅重点项目(16ZA0130) （16ZA0130）
中国地调局基础性公益性地质矿产调查项目(DD20160074-6) （DD20160074-6）
四川省科技厅应用基础研究项目(2016JY0127) (Projects(51674207, 51741408, 51304162) supported by the National Natural Science Foundation of China （2016JY0127）
Project(BGRIMM-KJSKL-2016-03) supported by the Found of State Key Laboratory of Mineral Processing （BGRIMM-KJSKL-2016-03）
Project(16ZA0130) supported by the Key Foundation of Natural Scientific Research of the Education Department of Sichuan Province （16ZA0130）
Project(DD20160074-6) supported by the Basic and Public Geology and Mineral Resources Survey Foundation of China Geological Survey （DD20160074-6）
Project(2016JY0127) supported by the Applied Basic Research Foundation of Science and Technology Agency of Sichuan Province) （2016JY0127）
