Comparison of components and parameters of some sulfide minerals surface tension with regards to stability of mineral-air bubble system
 
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Maria Curie-Sklodowska University, Faculty of Chemistry
CORRESPONDING AUTHOR
Bronisław Jańczuk   

Maria Curie-Sklodowska University, Faculty of Chemistry
Publication date: 2020-07-07
 
Physicochem. Probl. Miner. Process. 2020;56(In honour to Professor Zygmunt Sadowski 6):22–31
 
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ABSTRACT
The measurements of the advancing contact angle of water, glycerol, formamide, ethylene glycol, diiodomethane, -bromonaphthalene, 1,2,3-tribromopropane on unoxidized and oxidized galena, pyrite, chalcopyrite, djurleite, bornite and covellite at the temperature equal 293 K were made. Additionally, the measurements of the force air bubble detachment from these sulfide minerals including also chalcocite in water were performed. Using the values of the obtained contact angle of water, glycerol, formamide, ethylene glycol, diiodomethane, -bromonaphthalene, 1,2,3-tribromopropane the components and parameters of the unoxidized and oxidized sulfide minerals surface tension were calculated. For this calculation the van Oss et al. method was applied after analysis of the components and parameters of the surface tension of liquids used for contact angle measurements. Taking into account the contact angle of water on the sulfide minerals, the detachment force of air bubble from these minerals in water was determined using our equation and comparing to that of measured one. As follows from the measurements and calculations the wetting properties of sulfide minerals and the stability of mineral-air bubble depends to a larger extent on the degree of sulfide minerals oxidation than on the type of mineral.
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