Scientific-technological center “Parasat”, Astana, Kazakhstan:

N. S. Bekturganov, Scientific Consultant

Chemical-metallurgical institute named after Zh. Abishev, Karaganda, Kazakhstan:
G. L. Katkeeva, Leading Researcher, e-mail: katkeeva@mail.ru
I. M. Oskembekov, Senior Researcher
M. A. Akubaeva, Researcher

This paper gives the investigation results of sulfidizing of oxidized copper ores of Udokan deposit and influence of this process on concentratibility. Sulfidizing was carried out in autoclave with the temperature of 160 °C with application of element sulfur. Mathematical model of hydrothermal sulfidizing of Udokan ore was obtained by probabilistic-determined planning of experiment. The factors of hydrothermal sulfidizing are process temperature, duration, sulfur consumption on oxidized copper sulfidizing, and sodium sulfate consumption according to the consumed sulfur. Sulfidizing technology of oxidized copper ores by sodium polysulfide with 85 °C temperature in cell was offered for the purpose of decreasing of energy intensity of this process. There was obtained the mathematical model of the process, showing the influence of sulfidizing factors on copper mineral flotation. The possibility of use of low-disperse element sulfur during the synthesis of polysulfide solutions was investigated together with their usage as sulphidizer at the temperature of 80 °C. Application of low-disperse sulfur provides the decrease of energy intensity of solution obtaining. Besides, sulfiding properties of obtained reagents are changed. According to the obtained results, copper extraction with ordinary sodium polysulfide is higher, than the one with sodium sulfide: copper extraction growing is ~13%. At the same time, sulfiding is the prospective method of increasing of benefication efficiency of oxidated copper ores of Udokan deposit. Every offered method allows the increasing of copper extraction in concentrate.

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