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Developing the technology for the effective final concentration of gold-containing gravity concentrates

  • Mineral Processing of Non-Ferrous Metals
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Abstract

Jigging technology in a closed cycle is tested and optimized at one department of industrial gold mining for the final concentration of gravity concentrates with the use of PGShOK-50-2 sprinkling installation. The equation of regression—which adequately describes the dependence of the Goden selectivity index on the travel and vibration frequency of the cones, the specific consumption of the undersize water, and the height of the artificial bed during the operation of the jigging machine in such a mode—is obtained. It is established that, as the Au content in the starting product increases, which is promoted by the closed jigging cycle, its extraction into the concentrate (ɛ) also increases. As the operation of the concentration table is optimized, the influence of the frequency and travel length of the saddle, as well as of the angle of its transverse inclination, is investigated. The tailings of all apparatuses, which are used for the final concentration of gravity concentrates, are repurified by column flotation prior to output into the pile. The kinetics for gold grains of different fineness is investigated. As a result of optimizing the operation of a MOD-0.2 jigging machine and the SKO-0.5 concentration table, the extraction of metal from the crude concentrate into a product corresponding to requirements of refining (>92% of gold bullion) increased by 1.4–1.7% and was ≥98%. An increase in the productivity of the jigging machine, due to the use of jigging technology in a closed cycle and the stable operation of the concentration table, provided an increase in the productivity of the final concentration department of the gold-concentration installation on the whole.

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Authors and Affiliations

  1. North-Caucasian Metallurgical Institute (State Technological University), ul. Nikolaeva 44, Vladikavkaz, North Ossetia-Alaniya, 362021, Russia

    S. I. Evdokimov

  2. OAO Elektrotsink, ul. Zavodskaya 1, Vladikavkaz, North Ossetia-Alaniya, 362001, Russia

    A. M. Pan’shin

Authors
  1. S. I. Evdokimov
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  2. A. M. Pan’shin
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Correspondence to S. I. Evdokimov.

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Original Russian Text © S.I. Evdokimov, A.M. Pan’shin, 2009, published in Izvestiya VUZ. Tsvetnaya Metallurgiya, 2009, No. 4, pp. 7–13.

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Evdokimov, S.I., Pan’shin, A.M. Developing the technology for the effective final concentration of gold-containing gravity concentrates. Russ. J. Non-ferrous Metals 50, 321–326 (2009). https://doi.org/10.3103/S1067821209040014

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  • DOI: https://doi.org/10.3103/S1067821209040014

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