For the sake of gold production capacity maintenance and improvement, subsoil users have to exploit poor and rebellious ore placers or waste, which often feature increased content of fine gold extractable using special technology and equipment. The causes of gold loss in sluices are mainly: quality of circulation water for sand washing; higher content of silt–clay particles in initial sand; associated heavy minerals; morphology of gold; design factors of processing equipment. Efficiency of gold recovery is greatly affected by the increased content of heavy associated components in placer sand. For this reason, preliminary removal of magnetic and electromagnetic minerals from dressing circuit will reduces losses and improves total economic performance of mining. Minerals of high specific gravity, such as magnetite, ilmenite, chromite, cassiterite and tetradymite accumulate and compact on sluices, preventing from deposition of noble metal particles. At the Bolotisty Stream placer deposit, integrated performance evaluation is completed for gold washing machine PGSH-50, with the analysis of heavy metal yield in concentrate, as well as in tailings of deep and shallow filling gateways; furthermore, the technology is developed for recovery of magnetic fractions right within operation cycle of the washing machine. The proposed gold sand processing circuit both increases gold recovery, due to magnetite removal from processing and allows concurrent extraction of magnetic minerals.

For citation:  Alekseev V. S., Banshchikova T. S., Seryy R. S. Justification of magnetic separation application in processing of initial gold sand from the Bolotisty Stream primary-and-placer deposit, Lower Amur Region. MIAB. Mining Inf. Anal. Bull. 2019;(8):190-197. [In Russ]. DOI: 10.25018/02361493-2019-08-0-190-197.


Gold placer, magnetic minerals, fine gold, gold loss, gold extraction, washing machine, deep and shallow filling gateways, magnetic separation.

Issue number: 8
Year: 2019
ISBN: 0236-1493
UDK: 622.75: 622.342.1
DOI: 10.25018/0236-1493-2019-08-0-190-197
Authors: Alekseev V. S., Banshchikova T. S., Seryy R. S.

About authors: V.S. Alekseev, Cand. Sci. (Eng.), Senior Researcher, alekseev-vs_83@mail.ru, T.S. Banshchikova, Senior Researcher, R.S. Seryy, Cand. Sci. (Eng.), Senior Researcher, Mining Institute, Far Eastern Branch of Russian Academy of Sciences, 680000, Khabarovsk, Russia. Corresponding author: V.S. Alekseev, e-mail: alekseev-vs_83@mail.ru. Corresponding author: B.F. Simonov, e-mail: Simonov_bf@mail.ru.


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