Experimental justification of cyanoethyl dithiocarbamate usability toward enhanced copper and silver recovery from old waste at Solnechny GOK

Old waste of high-grade complex ore processing is a critical source of valuable mineral components. The reserves of base and noble metals accumulated in waste storages can often increase the content of these metals in low-grade ore meant or scheduled for recycling. In the meanwhile, oxidation, fine dissemination and metamorphic surface of minerals bearing target metals are the objective difficulties for the conventional technologies to be efficient. Development and application of new selective agents of directed action can ensure conditions for the enhanced recovery of base and noble metals from the mentioned type of raw materials. The effectiveness analysis of a new agent from the class of dithiocarbamates—S-cyanoethyl N,N-diethyl dithiocarbamate (CEDETC) demonstrates feasibility of enhanced recovery of copper and silver sulfides from old waste at Solnechny GOK. The analytical scanning electron and laser microscopy techniques proved the agent adsorption at mineral surface with formation of a stable hydrophobic compound with copper, which stimulated the hydrophobic behavior and flotation activity of minerals better as against the use of butyl xanthate. In flotation of old waste at Solnechny GOK, the new agent CEDETC, both in replacement of some xanthate and in case of extra consumption, ensures the increase in the copper and silver recovery by 7–9% and 3–4%, respectively, in the rough copper concentrate at the reduced yield of arsenic by 2–3%.

Keywords: processing, recovery, flotation, old waste, cyanoethyl dithiocarbamate agent.
For citation:

Matveeva T. N., Gromova N. K., Lantsova L. B., Gladysheva O. I. Experimental justification of cyanoethyl dithiocarbamate usability toward enhanced copper and silver recovery from old waste at Solnechny GOK. MIAB. Mining Inf. Anal. Bull. 2023;(1):119-129. [In Russ]. DOI: 10.25018/0236_1493_2023_1_0_119.


The study was supported by the Russian Science Foundation, Grant No. 22-17-00149, https://rscf.ru/project/22-17-00149/.

Issue number: 1
Year: 2023
Page number: 119-129
ISBN: 0236-1493
UDK: 622.7
DOI: 10.25018/0236_1493_2023_1_0_119
Article receipt date: 07.10.2022
Date of review receipt: 14.11.2022
Date of the editorial board′s decision on the article′s publishing: 10.12.2022
About authors:

T.N. Matveeva1, Dr. Sci. (Eng.), Deputy Director for Scientific Work, Head of Department, e-mail: tmatveyeva@mail.ru, ORCID ID: 0000-0002-5658-9948,
N.K. Gromova1, Researcher, e-mail: gromova_nk@mail.ru, ORCID ID: 0000-0002-4753-5745,
L.B. Lantsova1, Researcher, e-mail: lblancova@yandex.ru,
O.I. Gladysheva1, Graduate Student, e-mail: gladysheva.olga2022@bk.ru,
1 Institute of Problems of Comprehensive Exploitation of Mineral Resources of Russian Academy of Sciences, 111020, Moscow, Russia.


For contacts:

N.K. Gromova, e-mail: gromova_nk@mail.ru.


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