Mineral/Coal Flotation and Adsorption Mechanism

A special issue of Separations (ISSN 2297-8739). This special issue belongs to the section "Analysis of Energies".

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 1167

Special Issue Editors


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Guest Editor
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
Interests: flotation of mineral resources; green separation and purification; adsorption mechanism; flotation surface chemistry; comprehensive utilization of mineral resources

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Guest Editor
Key Laboratory of Separation and Processing of Symbiotic-Associated Mineral Resources in Non-ferrous Metal Industry, National Engineering Laboratory for Efficient Utilization of Indium and Tin Resources (Beijing), School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
Interests: mineral engineering; mineral materials; separation and purification; coal flotation; adsorption mechanism
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
Interests: mineral separation; flotation reagents; surface analysis; leaching; industrial wastewater treatment; mineral surface chemistry; process mineralogy; comprehensive utilization of mineral resources
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Flotation is a practical technique to extract minerals based on differences in the physical and chemical properties on the mineral surfaces. Flotation equipment, flotation techniques, and flotation reagents are used for the recovery and separation of valuable minerals from gangue minerals. The gradual depletion of high-grade mineral resources leads to an increase in the exploitation and utilization of refractory ores. The enhanced recovery of targeted minerals has become a problem that urgently needs to be solved. Thus, there is a crucial need for research on flotation theory and its application to address the issues in the recovery of valuable minerals. This Special Issue will focus on recent advances in mineral/coal flotation theory and techniques. Research or review articles concerning the synthesis and application of flotation reagents and adsorption mechanism, the migration rule of flotation reagents, the design of flotation equipment, enhanced flotation separation methods, refractory ore treatment, bubble–mineral interaction mechanism, theoretical calculation, process mineralogy, and plant practice are invited to this Special Issue. The issue will contribute to the understanding of these processes and the development of novel approaches to improve the flotation recovery of valuable minerals.

Prof. Dr. Dianwen Liu
Prof. Dr. Jiushuai Deng
Prof. Dr. Qicheng Feng
Guest Editors

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Keywords

  • mineral/coal flotation
  • green separation and purification
  • flotation reagents
  • flotation process and equipment
  • adsorption mechanism
  • surface analysis
  • theoretical calculation
  • process mineralogy
  • comprehensive utilization

Published Papers (1 paper)

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Research

14 pages, 4320 KiB  
Article
Effect of the Water Hardness Level on Chalcopyrite Flotation Inhibition by the Disodium Carboxymethyl Trithiocarbonate
by Yonghai Wang, Weiming Wu, Yanhai Shao, Wenqing Qin and Luzheng Chen
Separations 2023, 10(7), 375; https://doi.org/10.3390/separations10070375 - 26 Jun 2023
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Abstract
Disodium carboxymethyl trithiocarbonate (DCMT) is considered to have the potential to replace sulfide and cyanide as a new chalcopyrite inhibitor. However, the effect of its application in the industrial field is often not ideal, mainly because the flotation involves solid, liquid and gas [...] Read more.
Disodium carboxymethyl trithiocarbonate (DCMT) is considered to have the potential to replace sulfide and cyanide as a new chalcopyrite inhibitor. However, the effect of its application in the industrial field is often not ideal, mainly because the flotation involves solid, liquid and gas three-phase flotation systems, leading to many influencing factors, especially the chemical changes in pulp caused by the liquid phase. In order to promote the industrial application DCMT, we studied the effect of water quality in the flotation liquid phase on the inhibition of DCMT on chalcopyrite. Water quality generally involves the physical, chemical and biological characteristics of water bodies. The water for beneficiation belongs to industrial water, and the main indicator of its water quality is the water hardness level. Flotation and contact angle studies showed that higher water hardness levels suppressed chalcopyrite inhibition by DCMT. Infrared and Raman spectra revealed that the free CO32− and Ca2+ in water coordinated with the residual organic chains on the surface of the pretreated chalcopyrite and was subsequently adsorbed onto the chalcopyrite surface. Moreover, the addition of DCMT dislodged the captured CO32− and Ca2+. X-ray photoelectron spectroscopy indicated that DCMT could adsorb on the chalcopyrite surface and compete with the Ca2+. When Ca2+ was trapped on the chalcopyrite surface, there were fewer adsorption sites available to the DCMT, resulting in a lower inhibition capacity. Simultaneously, the presence of DCMT promoted the release of Ca2+ from the chalcopyrite surface. Therefore, the influence of water quality must be considered when designing a flotation reagent system, and the water hardness level should be reduced to optimize the flotation process. Full article
(This article belongs to the Special Issue Mineral/Coal Flotation and Adsorption Mechanism)
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