Synergistic mechanism between SDBS and oleic acid in anionic flotation of rhodochrosite  

作　　者：Yong-jie Bu Run-qing Liu Wei Sun Yue-hua Hu 

机构地区：[1]School of Minerals Processing and Bioengineering, Central South University

出　　处：《International Journal of Minerals,Metallurgy and Materials》2015年第5期447-452,共6页矿物冶金与材料学报（英文版）

基　　金：Financial support for this work was provided by the National Natural Science Foundation of China (No. 51104179);the Independent Exploration Innovation Fund of Central South University (No. 2014zzts058);Collaborative Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources;the Important Science & Technology Special Projects of Hunan Province, China

摘　　要：Pure mineral flotation experiments, zeta potential testing, and infrared spectroscopy were employed to investigate the interracial reactions of oleic acid （collector）, sodium dodecyl benzene sulfonate （SDBS, synergist）, and rhodochrosite in an anionic system. The pure mineral test shows that oleic acid has a strong ability to collect products on rhodochrosite. Under neutral to moderately alkaline conditions, low temperature （e.g., 10℃） adversely affects the flotation performance of oleic acid; the addition of SDBS significantly improves the dis- persion and solubility of oleic acid, enhancing its collecting ability and flotation recovery. The zeta potential test shows that rhodochrosite interacts with oleic acid and SDBS, resulting in a more negative zeta potential and the co-adsorption of the collector and synergist at the mineral surface. Infrared spectroscopy demonstrated that when oleic acid and SDBS are used as a mixed collector, oleates along with -COO- and --COOH functional groups are formed on the mineral surface, indicating chemical adsorption on rhodochrosite. The results demonstrate that oleic acid and SDBS co-adsorb chemically on the surface ofrhodochrosite, thereby improving the flotation performance of the collector.Pure mineral flotation experiments, zeta potential testing, and infrared spectroscopy were employed to investigate the interracial reactions of oleic acid （collector）, sodium dodecyl benzene sulfonate （SDBS, synergist）, and rhodochrosite in an anionic system. The pure mineral test shows that oleic acid has a strong ability to collect products on rhodochrosite. Under neutral to moderately alkaline conditions, low temperature （e.g., 10℃） adversely affects the flotation performance of oleic acid; the addition of SDBS significantly improves the dis- persion and solubility of oleic acid, enhancing its collecting ability and flotation recovery. The zeta potential test shows that rhodochrosite interacts with oleic acid and SDBS, resulting in a more negative zeta potential and the co-adsorption of the collector and synergist at the mineral surface. Infrared spectroscopy demonstrated that when oleic acid and SDBS are used as a mixed collector, oleates along with -COO- and --COOH functional groups are formed on the mineral surface, indicating chemical adsorption on rhodochrosite. The results demonstrate that oleic acid and SDBS co-adsorb chemically on the surface ofrhodochrosite, thereby improving the flotation performance of the collector.

关 键 词：RHODOCHROSITE FLOTATION sodium dodecyl benzene sulfonate oleic acid synergistic effects TEMPERATURE 

分 类 号：TD951[矿业工程—选矿]