Thermodynamics and Electrochemistry of the Interaction of Sphalerite with Iron (II)-Bearing Compounds in Relation to Flotation

Kyaw Zay Ya (), Boris Goryachev, Arkadiy Adigamov, Karina Nurgalieva and Igor Narozhnyy
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Kyaw Zay Ya: Department of Mathematics, National University of Science and Technology “MISiS”, Leninsky Avenue, 4, 119991 Moscow, Russia
Boris Goryachev: Department of Mathematics, National University of Science and Technology “MISiS”, Leninsky Avenue, 4, 119991 Moscow, Russia
Arkadiy Adigamov: Department of Mathematics, National University of Science and Technology “MISiS”, Leninsky Avenue, 4, 119991 Moscow, Russia
Karina Nurgalieva: Department of Development and Operation of Oil and Gas Fields, Saint-Petersburg Mining University, 21st Line, 2, 199106 St. Petersburg, Russia
Igor Narozhnyy: Mining Oil and Gas Departmen, RUDN University, Miklukho-Maklaya, 6, 117198 Moscow, Russia

Resources, 2022, vol. 11, issue 12, 1-10

Abstract: The flotation recovery of sphalerite depends on the inorganic reagents concentrations in the liquid phase of suspension and pH. This paper presents the results of studies of the interactions of iron (II) containing ions with the sphalerite surface in water solutions at different pH levels. The thermodynamic and electrochemical studies were carried out to analyze possible interactions of sphalerite with iron (II) sulfate in a water environment and relate them to sphalerite flotation with potassium butyl xanthate and sodium dibutyl dithiophosphate. The results of the thermodynamic calculations revealed the possibility of interaction of the sphalerite surface with iron (II) hydrolysis products. The effect of the hydroxide ions concentration on precipitation of iron (II) hydroxides was examined. The findings showed that at pH = 8 there were no precipitates observed in water solutions of FeSO 4 . Increasing pH of the solutions from 8 to 12 resulted in the formation of iron (II) hydroxides. The potentiometric studies revealed that in slightly alkaline solutions the Fe 2+ and FeOH + cations are potential-determining. In conclusion, the flotation tests with thiol collectors show the activation effect of iron (II) sulphate on sphalerite at low dosage and pH 12. This is evident by a higher flotation recovery of sphalerite at these conditions.

Keywords: flotation; sphalerite; iron sulfate; potassium butyl xanthate; sodium butyl dithiophosphate; thermodynamics; Gibbs thermodynamic potential; electrochemical potential; mineral electrode (search for similar items in EconPapers)
JEL-codes: Q1 Q2 Q3 Q4 Q5 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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