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Flotation kinetics and thermodynamic behavior of chalcopyrite and pyrite in high alkaline systems

Autorzy
Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The monomineral flotation test and microcalorimetry were used to study the flotation kinetics and thermodynamic behavior of chalcopyrite and pyrite in high alkaline systems of lime and NaOH. The results showed that in these systems there were less hydrophilic substances on the chalcopyrite surface, so that the apparent activation energy of sodium butyl xanthate (SBX) adsorption on chalcopyrite surface was low. This promoted the adsorption of SBX and increased the flotation rate and recovery of chalcopyrite. In contrast, the hydrophilic Fe(OH)3 and SO42- formed by oxidation on the pyrite surface increased the adsorption activation energy of SBX. Thus, the flotation rate and recovery of pyrite were lower. Moreover, in the lime high alkaline system, the hydrophilic calcium film generated on the pyrite surface further hindered the adsorption of SBX, thereby further inhibiting pyrite in this environment. In other words, the lime high alkaline environment increased the apparent activation energy difference of SBX adsorption between chalcopyrite and pyrite compared to the NaOH system, facilitating the flotation separation of chalcopyrite and pyrite. The results can help with the theoretical research of flotation separation of other minerals, and provide guidance for developing low alkaline and lime-free pyrite depressants.
Rocznik
Strony
901--910
Opis fizyczny
Bibliogr. 46 poz., rys.
Twórcy
autor
  • College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
  • Jiangxi Key Laboratory of Mining Engineering, Ganzhou 341000, China
autor
  • College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
autor
  • College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
autor
  • College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China, jxustyhs@163.com
autor
  • College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
Bibliografia
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  • 25. MAIER, G.S., QIU, X., DOBIAS, B., 1997. New collectors in the flotation of sulphide minerals: a study of the electrokinetic, calorimetric and flotation properties of sphalerite, galena and chalcocite, Physicochemical and Engineering Aspects 122, 207-225.
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  • 34. PENG, Y.J., GRANO, S., FORNASIERO, D., RALSTON, J., 2003. Control of grinding conditions in the flotation of chalcopyrite and its separation from pyrite, International Journal of Mineral Processing 69, 87-100.
  • 35. QIN, W.Q., LONG, H.Z., QIU, G.Z., SUN, S.Y., 1996. Surface charactristics and activation of pyrite in high alkaline and calcium medium, Nonferrous Metals 48, 35-38. (in Chinese).
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  • 39. SUN, W., ZHANG, Y., QIN, W.L., HU, Y.H., 2010. Activated flotation of pyrite once depressed by lime, Journal of Central South University (Science and Technology) 41, 813-818. (in Chinese).
  • 40. SUN, X.J., GU, G.H., LI, J.H., HU, Y.H., 2010. Influences of collector CSU31 on chalcopyrite and pyrite flotation, Journal of Central South University (Science and Technology) 41, 406-410. (in Chinese).
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  • 42. WOODS, R., 2003. Electrochemical potential controlling flotation, Mineral Engineering 72, 151-162.
  • 43. YANG, Q., CHEN, S.P., XIE, G., LIU, X.L., LIU, M.Y., ZHU, Z.L., JIA, Q.S., GAO, S.L., 2014. Development and application of RD496 microcalorimeter, Scientia Sinica Chimica 44, 889-914. (in Chinese).
  • 44. ZHANG, H.J., LIU, J.T., CAO, Y.J., WANG, Y.T., 2013. Effects of particle size on lignite reverse flotation kinetics in the presence of sodium chloride, Powder Technology 246, 658-663.
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-f3b086a4-fc8c-4211-ad79-e1d1703f93d4
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