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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Plotnikova A. A., Bragin V. I., Knyazev Yu. V.
Заглавие : Structural Characteristics and Processability of Sphalerite in Lead-Zinc Ore of the Gorevka Deposit
Место публикации : J. Min. Sci. - 2019. - Vol. 55, Is. 6. - P.995-1006. - ISSN 1062-7391, DOI 10.1134/S1062739119066381. - ISSN 1573-8736(eISSN)
Примечания : Cited References: 33
Аннотация: The theoretical and experimental substantiation of the behavior of ferrous sphalerite in magnetic separation is given in terms of the Gorevka deposit ore. In sphalerite of this deposit, the content of isomorphous iron ranges as 4-9%. The Mossbauer spectroscopy showed the singlet and two doublet lines of iron, demonstrating separate arrays of iron atoms in sphalerite lattice, with formation of Fe-Fe pairs and clusters of three or more iron atoms. It is found that distribution of iron in sphalerite into three forms coincides for magnetic and nonmagnetic products of zinc concentrate separation. It is determined that magnetic separation undivides sphalerite grains by the isomorphous iron content but is governed by the genetic features of the deposit formation-association of sphalerite with magnetic minerals (pyrrhotine and siderite) and the absence of such associations in galena.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krinitsyn D. O., Romanchenko A. S., Vorob'ev S. A., Likhatskii M. N., Karacharov A. A., Krylov A. S., Volochaev M. N., Mikhlin, Yu L.
Заглавие : Synthesizing zinc sulfide films on the gold surface as the sensor for electrochemical quartz crystal microbalance
Коллективы : Russian Scientific FoundationRussian Science Foundation (RSF) [18-17-00135]
Место публикации : Russ. J. Electrochem. - 2021. - Vol. 57, Is. 12. - P.1157-1163. - ISSN 1023-1935, DOI 10.1134/S1023193521120041. - ISSN 1608-3342(eISSN)
Примечания : Cited References: 23. - The study was supported by the Russian Scientific Foundation (grant no. 18-17-00135)
Предметные рубрики: CHEMICAL BATH DEPOSITION
ZNS
SPHALERITE
ELECTRODES
ACTIVATION
Аннотация: A zinc sulfate film is deposited from aqueous solutions of zinc sulfate onto the gold surface with the aim of preparation of a sensor for electrochemical quartz crystal microbalance (EQCM). The kinetics of this process, the particles formed in solution, and the film itself are studied by the methods of electrochemical quartz crystal microbalance, X-ray photoelectron spectroscopy, transmission electron microscopy, atomic force microscopy, optical and Raman spectroscopies, and dynamic light scattering. The effect of the procedure of gold surface preparation, the reagent concentration, and the temperature on the film adhesion, the length of induction period, the kinetics of film growth, and its structure and thickness are studied. It is shown that the film formation proceeds as a result of deposition of sufficiently coarse 200-700 nm colloid particles of sphalerite. It is demonstrated that this sensor can be used in studying the electrochemical reactions of ZnS and the interface phenomena by the methods of EQCM and cyclic voltammetry.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vorob’ev S. A., Burdakova E. A., Sarycheva A. A., Volochaev M. N., Karacharov A. A., Likhatskii M. N., Mikhlin Y. L.
Заглавие : Analysis of function of copper sulfide nanoparticles as sphalerite flotation activator
Место публикации : J. Min. Sci. - 2021. - Vol. 57, Is. 1. - P.144-153. - ISSN 10627391 (ISSN), DOI 10.1134/S1062739121010154
Примечания : Cited References: 22. - This study was supported by the Russian Science Foundation, project no. 18-17-00135
Аннотация: The authors compare the effect exerted by copper ions and sulphide copper nanoparticles on flotation of Gorevka deposit sphalerite using potassium n-butyl xanthate and in reagent-less regime. Covelline-like colloid particles 4–8 nm in size, obtained in interaction of copper (II) and sulfide ions in aqueous solutions, are characterized using the methods of dynamic light scattering, electron microscopy and diffraction. Sphalerite surface after reaction with copper ions and CuS dispersoid solutions are described by zeta-potential measurements and X-ray photoelectron spectroscopy. It is found that sphalerite flotation after activation with nanoparticles is lower than with copper ion solutions of the same concentrations, and improves with increasing duration of activation and flotation processes. The mechanism of CuS nanoparticles consists in creation of active centers for the collector to attach to, which intensifies the hydrophobic behavior and adsorption of the collector. Moreover, CuS nanoparticles promote formation of a special microrelief of the solid–liquid interface, which ensures rupture of liquid film and attachment of sphalerite particles to air bubbles when they collide.
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