Solution chemistry of carbonate minerals and its effects on the flotation of hematite with sodium oleate

• Published in: International journal of minerals, metallurgy and materials Vol. 24; no. 7; pp. 736 - 744
• Main Authors: Li, Dong, Yin, Wan-zhong, Xue, Ji-wei, Yao, Jin, Fu, Ya-feng, Liu, Qi
• Format: Journal Article
• Language: English
• Published: Beijing University of Science and Technology Beijing 01.07.2017; Springer Nature B.V; School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China%School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China; College of Zijin Mining, Fuzhou University, Fuzhou 350116, China%Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
• Subjects: Calcium ions; Cations; Ceramics; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Composites; Corrosion and Coatings; Dissolution; Dolomite; Flotation; Fourier transforms; Glass; Hematite; Infrared analysis; Infrared spectroscopy; Ions; Materials Science; Mathematical analysis; Metallic Materials; Minerals; Natural Materials; Photoelectrons; Siderite; Sodium; Sodium oleate; Solution chemistry; Surfaces and Interfaces; Thin Films; Tribology; X ray photoelectron spectroscopy; Zeta potential; sodium oleate; solution chemistry; hematite; flotation; carbonate minerals
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-017-1457-7

The effects of carbonate minerals（dolomite and siderite） on the flotation of hematite using sodium oleate as a collector were investigated through flotation tests, supplemented by dissolution measurements, solution chemistry calculations, zeta-potential measurements, Fourier transform infrared（FTIR） spectroscopic studies, and X-ray photoelectron spectroscopy（XPS） analyses. The results of flotation tests show that the presence of siderite or dolomite reduced the recovery of hematite and that the inhibiting effects of dolomite were stronger. Dissolution measurements, solution chemistry calculations, and flotation tests confirmed that both the cations(Ca2+ and Mg2+) and CO32+ions dissolved from dolomite depressed hematite flotation, whereas only the 23CO-ions dissolved from siderite were responsible for hematite depression. The zeta-potential, FTIR spectroscopic, and XPS analyses indicated that Ca2+, Mg2+, and CO32-（HCO3-） could adsorb onto the hematite surface, thereby hindering the adsorption of sodium oleate, which was the main reason for the inhibiting effects of carbonate minerals on hematite flotation.