Scientific Research Geotechnological Center, Far Eastern Branch of Russian Academy of Sciences, Petropavlovsk-Kamchatsky, Russia

V. A. Iodis, Candidate of Technical Sciences, Leading Researcher, e-mail: iodisva@mail.ru
I. A. Koydan, Researcher, e-mail: koydan91@mail.ru

This work was carried out with the aim of experimentally determining the parameters of the ultrasonic treatment process in which oxide films will be removed from the surface of sulfide particles —pyrrhotite, pentlandite, pyrite, etc. in the pulp. Analysis of literature sources and previous studies has shown that there is a lack of experimental data to determine the parameters of ultrasonic treatment process, which would provide the removal of oxide film from ore pulp particle surface. The studies were carried out on a mounted reactor, which is a sealed ore pulp reactor with an ultrasonic vibration concentrator and a working tool (emitter) immersed in it. Water cooling was provided on the outside of the reactor. The experiments were carried out at an ultrasonic vibration frequency of 22 kHz ± 1.65, intensities of 7.2, 11, 21 and 28 W/cm², for 15 minutes. The maximum power consumption by the generator was 400 W, acoustic power — 200 W, radiation power — 120 W, with a power control range of 30–100%. The work used samples of sulfide ores from the Shanuch copper-nickel deposit (Kamchatka Krai), subjected to crushing, grinding to 100% control class –0.1 mm and classification on a sieve screen. As shown by studies of ultrasonic exposure on a mounted laboratory reactor using an ultrasonic technological apparatus of the “Volna” type, model UZTA-0.4/22-OM, and microscopic studies using an ore polarizing microscope POLAM R-312, the parameters of the ultrasonic exposure process, in which oxide films will be removed from the surface of the ore particles of the pulp; with minimal grinding of the ore particles, radiation intensity is 21 W/cm², the process duration is from 15 minutes, the reduction in the control class –0.1 mm was 12.2%.

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