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Efficiency of preliminary gravity separation of gold-bearing ore from the Malinovka deposit

Reduction in volume of ore to be processed and the increase in the content of a useful component in ore improves the valuable mineral extraction in basic processes of concentration and decreases the number of ‘neck stages’ in a work cycle. This article discusses preconcentration of gold-bearing ore from the Malinovka deposit in the Primorsky Krai of Russia. Preliminary float-and-sink separation by the size grade of –10+5 mm enabled gold recovery of 71.19% at the concentrate yield of 10.9% and gold content of 15.62 g/t with production of tailings with the gold content of 0.77 g/t, which disallowed recommending that method as efficient concentration technique. Using the lab-scale centrifugal concentrator KN-0,1 (ITOMAK) and the GRG test results, it was found that gold recovery in the ultimate concentrate totaled 37.38% at the yield of 5.1%. The content of gold was 19.78% in the ultimate concentrate and 1.78 g/t in the tailings. This means that centrifugal concentration can only be included in the early phase of the processing circuit to catch free gold. Preliminary centrifugal concentration of Malinovka gold ore allows increasing gold recovery in the subsequent flotation process by 1.9–6.9%, from 85.2–90.4 to 92.1–93.6%, and obtaining tailings with the gold content less than 0.3 g/t. Thus, efficiency of gravity methods used in the early stages of composite processing circuits for the gold-bearing ore from the Malinovka deposit is evaluated.

Keywords: preliminary concentration, gravity methods, float-and-sink separation, centrifugal concentration, GRG test, flotation, gold.
For citation:

Samusev A. L., Timofeev A. S., Lantsova L. B. Efficiency of preliminary gravity separation of gold-bearing ore from the Malinovka deposit. MIAB. Mining Inf. Anal. Bull. 2024;(7):155-168. [In Russ]. DOI: 10.25018/0236_1493_2024_7_0_155.

Acknowledgements:

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

Issue number: 7
Year: 2024
Page number: 155-168
ISBN: 0236-1493
UDK: 622.7.05
DOI: 10.25018/0236_1493_2024_7_0_155
Article receipt date: 16.11.2023
Date of review receipt: 04.04.2024
Date of the editorial board′s decision on the article′s publishing: 10.06.2024
About authors:

A.L. Samusev1, Cand. Sci. (Eng.), Senior Researcher, e-mail: andrey63vzm@mail.ru, ORCID ID: 0000-0001-7324-0353,
A.S. Timofeev1, Cand. Sci. (Eng.), Senior Researcher, e-mail: Timofeev_ac@mail.ru, ORCID ID: 0000-0002-3382-6007,
L.B. Lantsova1, Researcher, e-mail: lblancova@yandex.ru, ORCID ID: 0000-0002-6555-4165,
1 Institute of Problems of Comprehensive Exploitation of Mineral Resources of Russian Academy of Sciences, 111020, Moscow, Russia.

 

For contacts:

A.S. Timofeev, e-mail: Timofeev_ac@mail.ru.

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