PROMISING DISSOCIATION TECHNOLOGIES FOR PREPARATION OF MINERALS TO FLOTATION
S. V. Mamonov1,2, V. N. Zakirnichny1, A. A. Metelev3, T. P. Dresvyankina1, S. V. Volkova1, V. A. Kuznetsov3, S. V. Ziyatdinov1
1Uralmekhanobr, Yekaterinburg, 620063 Russia
2UMMC Technical University, Verkhnyaya Pyshma, 624091 Russia
3Svyatogor, Krasnouralsk, 624330 Russia
Keywords: Технология, бисерная мельница, ультратонкое измельчение, мельница Vertimill, флотация, тонкое вибрационное гидравлическое грохочение, раскрытие минералов, извлечение, шлам, Technology, bead mill, ultra-fine milling, Vertimill, flotation, fine hydraulic vibratory screening, mineral dissociation, extraction, slime
Abstract
Milling of minerals and middlings is studied in ultra-thin bead mills, Vertimill fine milling machines and in hydropercussion-and-cavitation machines (rotary-pulsating type). Fine and ultra-fine milling provides the wanted rate of dissociation of sulphide minerals and host rocks as compared with ball milling, while hydropercussion-and-cavitation milling improves selectivity of dissociation at equal grain size composition of products from the rotary-pulsating machines and ball mills. Possible improvement of ore quality by fine hydraulic vibratory screening before deep concentration is examined. It is shown that as against hydrocyclones in pre-treatment circuits, fine hydraulic vibratory screens reduce circulation of fines with oversize flow, decrease overgrinding and increase mass fraction of optimal sizes for subsequent flotation.
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