Effect of sulfoxide-based modifiers on sulfide mineral floatability and on production data of ore flotation

The article describes the research findings on the formation and stability of sulfurbearing ions in the water phase of pulp slurries depending on the medium pH and on the duration of tempering agents–modifiers from the class of sulfoxides. In flotation of nonferrous metals with sulfur-bearing modifiers, the influence of the latter mainly depends on the value of pH and on the tempering duration which governs stability of the modifiers. For example, floatability of pyrite is lower in a greater degree at pHinit–8 with Na2S2O3, Na2S2O4, NH4HSO3, Na2SO3. The productivity of flotation of Uchaly copper–zinc ore is higher with Na2SO3, Na2S2O3 and NH4HSO3 at pHinit–8 as compared with SO2. The selectivity index is higher with Na2SO3 (6,3) as against SO2 (5,3), Na2S2O3 (5,0) and NH4HSO3 (3,2). The increase in the consumption of the modifiers over 1 kg/t decreases the floatability of copper sulfides. In the standard reagent modes of flotation of Uzelga pyritic copper–zinc ore, the increased concentration of sodium thiosulfate from 0.3 to 1 g/l reduces the copper recovery from 61 to 19%. The selectivity index in flotation of copper sulfides at Na2S2O3 = 0,3 g/l, pH–8,0 and ORP = +120 mV totals 3.31 as against 1.68 at Na2S2O3 = 1 g/l, pH–11,5 and ORP = –30 mV.

Bocharov V. А., Ignatkina V. A., Abrytin D. V., Kayumov А. А., Kayumova V. R. (Korzh). Effect of sulfoxide-based modifiers on sulfide mineral floatability and on production data of ore flotation. MIAB. Mining Inf. Anal. Bull. 2022;(12):20-33. [In Russ]. DOI: 10.25018/0236_1493_2022_12_0_20.

The study was supported by the Russian Foundation for Basic Research, Project No. 20-05-00157.

V.A. Bocharov¹, Dr. Sci. (Eng.), Professor, ORCID ID: 0000-0002-8233-9635,
V.A. Ignatkina¹, Dr. Sci. (Eng.), Professor, e-mail: woda@mail.ru, ORCID ID: 0000-0003-2552-206X,
D.V. Abrytin, Cand. Sci. (Eng.), Deputy General Director, OOO «ADV-Inzhiniring», e-mail: abrutin@mail.ru,
A.A. Kayumov¹, Cand. Sci. (Eng.), Leading Engineer-Technologist, e-mail: maliaby_92@mail.ru, ORCID ID: 0000-0003-0502-6595,
V.R. Kayumova (Korzh)¹, Graduate Student, e-mail: viktoriya.korzh09@gmail.com, ORCID ID: 0000-0001-7527-1284,
¹ National University of Science and Technology «MISiS», 119049, Moscow, Russia.

A.A. Kayumov, e-mail: maliaby_92@mail.ru.

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