Journal article
Sulfonated brown coal: A novel depressant for the selective flotation of scheelite from calcite
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v 602, 125006
05 Oct 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In the present study, the feasibility of sulfonated brown coal, a hydrophilic macromolecular mixture, to be applied as a depressant in the flotation separation of scheelite and calcite was delved into by micro-flotation experiments. Besides, its depression mechanism was studied by Zeta potential measurement, FTIR spectra and contact angle measurement. As suggested from the results of pure mineral and binary mixed minerals flotation tests, scheelite and calcite could be effectively separated in the case of slurry pH of 6 similar to 12, sulfonated brown coal dosage of 7 mg/L and sodium oleate dosage of 50 mg/L. Sulfonated brown coal showed high effectiveness in selectively inhibiting calcite. As revealed from the results of Zeta potential measurement, FTIR spectra and contact angle measurement, the adsorbing effect of sulfonated brown coal on the calcite surface was larger than on the scheelite. When sulfonated brown coal was being adsorbed, the sodium oleate adsorbing process was decelerated in calcite; as a result, the hydrophilicity and the floatability of calcite were enhanced and deteriorated, respectively. However, sulfonated brown coal was basically not adsorbed on the scheelite surface, which slightly restricted the adsorption of sodium oleate on scheelite surface. Sulfonated brown coal could act as an alternative depressant for separating scheelite and calcite flotation.
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Details
- Title
- Sulfonated brown coal: A novel depressant for the selective flotation of scheelite from calcite
- Publication Details
- COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v 602, 125006
- Publisher
- ELSEVIER; AMSTERDAM
- Grant note
- The authors would like to express their gratitude to National Natural Science Foundation of China (Project No. 51604302 and No. 51574282), Provincial science and technology leader (Innovation team of interface chemistry of efficient and clean utilization of complex mineral resources, Grant No.2016RS2016), Postgraduate independent exploration and innovation project of Central South University (No. 2018zzts224) and the Key laboratory of Hunan Province for Clean and Efficiency Utilization of strategic Calcium-containing mineral Resources (No. 2018TP1002) for support.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Drexel University
- Web of Science ID
- WOS:000562665300010
- Scopus ID
- 2-s2.0-85085941609
- Other Identifier
- 991021860675004721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical