Panshin A. M.,  General Director, Chelyabinsk Zinc Plant (Russia), vab@zinc.ru; Yevdokimov S. I., Associate Professor, North Caucasus Mining and Metallurgical Institute (Russia), evaser@mail.ru; Artyomov S. V., Postgraduate, North Caucasus Mining and Metallurgical Institute (Russia).

A gravity-flotation concentration technology has been developed for gold-bearing ores, in which gold is mainly bound with sulfides — arsenopyrite, pyrrhotine, pyrite, antimonite and chalcopyrite. Activated fine size fractions (finer than 70 microns) of quartz, carbonates and mica go into concentrate, increasing its yield, which reduces technical-and-economic performance indicators of sulfide concentrate bacterial oxidation. In order to reduce concentrate yield, new flotation flow sheet is proposed: feed pulp is divided into two flows, then, concentrate is separated from one flow, and mixed with the second flow of feed pulp. Pulp process flows are named «flotation jets». From the results of experiments, conducted as continuous process, it follows, that the applied «jet@ method provides for gold content increase in rougher flotation feed, permitting to reduce concentrate yield by 19.7 % rel. A method for recovered minerals flotation intensification has been developed, by means of which, mixture of air with water steam (t = 104 °С, р ~ 0.1 MPa) — aerosol, is used as gas phase in flotation. It was established through experiments, that by using aerosol, size of bubbles is reduced by the factor of 2–2.5. Size of bubbles was determined by the frequency of their appearance in measuring cell in external uniform magnetic field in a glass tube, filled with ferrofluid and placed in a system of induction coils: with change in magnetic flux that threads coils surface, when bubble appeared in magnetizing medium, emf of induction, occurring in coils, was registered.

1. Samygin V. D. Zakonomernosti razdeleniya i optimizatsiya fraktsionnoy flotatsii neodnorodnykh komponentov: avtoref. dis. … kand. tekhn. nauk (Laws of separation and optimization of fractional flotation of non-uniform components. Author's abstract of candidate’s dissertation). Moscow, Research Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, 1987, 37 p.
2. Kanashvili M. Zh. Aerozolnaya kolonnaya flotatsiya Cu-Ni rud i rossypnogo zolota: avtoref. dis. … kand. tekhn. nauk (Aerosol column flotation of Cu-Ni ores and alluvial gold. Author's abstract of candidate’s dissertation). Vladikavkaz, 2006, 20 p.

3. Yevdokimov S. I., Panshin A. M., Solodenko A. A. Mineralurgiya (Minerallurgy). Vol. 2. Uspekhi flotatsii (Progress in flotation). Vladikavkaz, MAVR, 2010, 992 p.
4. Plaksin I. N., Okolovich A. M., Dmitrieva G. M., Makienko I. I., Kryukova N. A. Novaya tekhnologiya obogashcheniya svintsovo-tsinkovoy rudy (New technology of Pb-Zn ores beneficiation). Moscow, Gosgortekhizdat, 1961, 128 p.
5. Barochkin Ye. V. Analiz i optimalny sintez teploobmennykh sistem so slozhnoy konfiguratsiey potokov v energeticheskikh khimicheskikh kompleksakh: avtoref. dis. … doktora tekhn. nauk (The analysis and optimum synthesis of heat-exchange systems with a difficult configuration of streams in power chemical complexes. Author's abstract of doctor’s dissertation). Ivanovo, Ivanovo State University of Chemistry and Technology, 2008, 32 p.
6. Yastrebov A. K. Teplovye protsessy v tekhnike — Thermal Processes in Engineering, 2009, Vol. 1, No 12, pp. 519–522.
7. Korolyov A. V. Energetika. Izvestiya vuzov i energeticheskikh obedineniy SNG — Power. News of Higher Schools and Power Associations of the CIS. 2009. № 6. С. 31–36.
8. Kobozev M. A., Simonovskiy A. Ya. Zhurnal tekhnicheskoy fiziki — Journal of Applied Physics. 2007, Vol. 77, iss. 11, pp. 31–38.
9. Lavrinenko A. A. Razvitie teorii protsessa pnevmopulsatsionnoy flotatsii i sozdanie vysokoproizvoditelnykh kolonnykh apparatov: avtoref. dis. … doktora tekhn. nauk (Development of the theory of pneumooscillatory flotations and creation of high-efficiency columned devices. Author's abstract of doctor’s dissertation). Moscow, Research Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, 2005. 36 p.