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Название Possibility of using calcium polysulfide as sulphidizer in the flotation of oxidized lead-bearing ores
DOI 10.17580/tsm.2018.10.02
Автор Turysbekov D. K., Semushkina L. V., Mukhanova А. А., Narbekova S. M.
Информация об авторе

Institute for Metallurgy and Ore Concentration, Almaty, Kazakhstan:

D. K. Turysbekov, Lead Researcher at the Laboratory of Flotation Reagents and Beneficiation, e-mail: dula@mail.ru
L. V. Semushkina, Lead Researcher at the Laboratory of Flotation Reagents and Beneficiation
А. А. Mukhanova, Research Fellow at the Laboratory of Flotation Reagents and Beneficiation
S. M. Narbekova, Research Fellow at the Laboratory of Flotation Reagents and Beneficiation, e-mail: s.narbekova@mail.ru


Analysis of the existing beneficiation processes for oxidized and complex heavy non-ferrous metals ores shows that more than 50% of the metal that goes to tailings is due to the metal being present as metal oxide compounds. The best solution for this problem would be changing the floatability of oxidized minerals through deeper surface sulphidisation during grinding. The authors looked at the possibility of using calcium polysulfide versus sodium sulfide (principal reagent) as a sulphidizer in the flotation of oxidized leadbearing ores. The new sulphidizer was produced with calcium oxide (lime), sulfur, water and heat. The mass ratio of the components is S:CaO:Н2О = 10:5:85. An ore sample from the Rodnikovoe deposit in Kazakhstan was used in the study. The authors analysed the composition of the primary ore. The results of the phase analysis of the lead minerals indicate that 77.7% of lead is present as galena, 11.5% — as cerussite and 3.5% — as anglesite. The results of the dispersion analysis show that commercial lead minerals are evenly found in the 0–71 μm grade. A flotation process is proposed which includes ore grinding, rougher flotation, scavenger flotation and two recleaner flotation stages for lead concentrate. Optimum ore fineness and optimum flow rates for the principal and new sulphidizers were identified. It is shown that, compared with the basic process, the application of calcium polysulfide as a sulphidizer helps improve the quality of the lead concentrate and raise the recovery. Thus, the concentration and the froth recovery of lead increased by 8.5–9.0%; the cerussite recovery — by 5.0–5.5%. The optimum flow rate for the sulphidizer remained the same. Hence, calcium polysulfide can substitute the conventional sulphidizer in the flotation of oxidized ores.

Ключевые слова Oxidized ore, sulphidizer, sodium sulfide, calcium polysulfide, flotation, recovery, concentrate
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