{"title":"用高频介电测量研究捕收剂和抑制剂在方解石上的吸附","authors":"M. Khayar , J. Bessière","doi":"10.1016/j.minpro.2017.06.006","DOIUrl":null,"url":null,"abstract":"<div><p><span>It is possible to analyze in situ the adsorbate/adsorbant interaction during the flotation<span> process by high frequency dielectric measurements. The adsorption of complexing collector (sodium oleate) onto calcite<span> increases the dielectric permittivity independently of the frequency. The dielectric constant increases after adsorption because the adsorbate and the adsorbant interact through covalent bonds. Physical adsorption involving electrostatic interactions or </span></span></span>hydrogen bonds<span> (dodecylamine and dodecylsulfate) has no effect on the dielectrical characteristics. The dielectric method allows to analyze the mechanisms of depression using reagents such as quebracho and sodium silicate.</span></p></div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2017-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.06.006","citationCount":"4","resultStr":"{\"title\":\"Study of the adsorption of collectors and depressants onto calcite by high frequency dielectric measurements\",\"authors\":\"M. Khayar , J. Bessière\",\"doi\":\"10.1016/j.minpro.2017.06.006\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span>It is possible to analyze in situ the adsorbate/adsorbant interaction during the flotation<span> process by high frequency dielectric measurements. The adsorption of complexing collector (sodium oleate) onto calcite<span> increases the dielectric permittivity independently of the frequency. The dielectric constant increases after adsorption because the adsorbate and the adsorbant interact through covalent bonds. Physical adsorption involving electrostatic interactions or </span></span></span>hydrogen bonds<span> (dodecylamine and dodecylsulfate) has no effect on the dielectrical characteristics. The dielectric method allows to analyze the mechanisms of depression using reagents such as quebracho and sodium silicate.</span></p></div>\",\"PeriodicalId\":14022,\"journal\":{\"name\":\"International Journal of Mineral Processing\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-09-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.minpro.2017.06.006\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Mineral Processing\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0301751617301321\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Earth and Planetary Sciences\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Mineral Processing","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0301751617301321","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Earth and Planetary Sciences","Score":null,"Total":0}
Study of the adsorption of collectors and depressants onto calcite by high frequency dielectric measurements
It is possible to analyze in situ the adsorbate/adsorbant interaction during the flotation process by high frequency dielectric measurements. The adsorption of complexing collector (sodium oleate) onto calcite increases the dielectric permittivity independently of the frequency. The dielectric constant increases after adsorption because the adsorbate and the adsorbant interact through covalent bonds. Physical adsorption involving electrostatic interactions or hydrogen bonds (dodecylamine and dodecylsulfate) has no effect on the dielectrical characteristics. The dielectric method allows to analyze the mechanisms of depression using reagents such as quebracho and sodium silicate.
期刊介绍:
International Journal of Mineral Processing has been discontinued as of the end of 2017, due to the merger with Minerals Engineering.
The International Journal of Mineral Processing covers aspects of the processing of mineral resources such as: Metallic and non-metallic ores, coals, and secondary resources. Topics dealt with include: Geometallurgy, comminution, sizing, classification (in air and water), gravity concentration, flotation, electric and magnetic separation, thickening, filtering, drying, and (bio)hydrometallurgy (when applied to low-grade raw materials), control and automation, waste treatment and disposal. In addition to research papers, the journal publishes review articles, technical notes, and letters to the editor..