Composition and Properties of Highly Dispersed Particles Generated under Sulfide Ore Milling
YU. L. MIKHLIN1, S. A. VOROB’EV1,2, S. V. KARASEV1, A. S. ROMANCHENKO1, A. A. KARACHAROV1, E. S. KAMENSKY1, E. A. BURDAKOVA2
1Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Bld. 24, Krasnoyarsk, 660036 Russia
2Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk, 660036 Russia
Keywords: руды цветных металлов, высокодисперсные частицы, коллоидные частицы, гранулометрический анализ, лазерная дифракция, динамическое рассеяние света, дзета-потенциал, рентгеновская фотоэлектронная спектроскопия, nonferrous metal ores, highly dispersed particles, colloid particles, grain-size composition analysis, laser diffraction, dynamic light scattering, zeta-potential, X-ray photoelectron spectroscopy
Abstract
Laser diffraction analysis and dynamic light scattering method are used to study highly dispersed particles generated during milling of lead-zinc ore (Gorevskoe deposit), rich sulfide and impregnated copper-nickel ore (Norilsk and Kingash deposits), as well as Gorevskoe Pb concentrate and Sorskoe deposit Cu and Mo concentrates. Zeta-potentials of particles are measured in clarified (colloid) solution above precipitation; surface composition of ores and their fine sizes is analyzed using X-ray photoelectron spectroscopy. The highest yield of particles under 5 μm size grade (to 3 total percent) was observed in case of Kingash ore; moreover, zeta-potential of these particles was positive at pH 9.5 and surface compositions of precipitation and colloid particles were nearly the same. Comparatively high content of ultra dispersed fractions was observed in case of Gorevskoe ore and Pb concentrate. Clarified solutions contained mostly aggregates of nano-size particles, first of all, Si and Mg minerals, with the hydrodynamic diameter of 500-1200 nm, which shows little changes with time. Sulfide component of hydrosols contains many nano-size particles of minerals that better resist oxidation (sphalerite, molybdenite, pentlandite, chalcopyrite) and, in particular, can transfer metals in the ambient medium.
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