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ArticleName Calculation of optimal intensity of ultrasonic vibrations for removal of oxide films from the surface of ore pulp particles
DOI 10.17580/nfm.2023.02.02
ArticleAuthor Iodis V. A.
ArticleAuthorData

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

V. A. Iodis, Candidate of Technical Sciences, Leading Researcher1, e-mail: iodisva@mail.ru

Abstract

In the processing of oxidized, refractory ores, the removal of oxide films from the mineral surface is an important task. Oxide films create a passivating effect leading to the transition of the metal surface into an inactive state, which slows down physical and chemical processes, such as bacterial oxidation process. In order to avoid this effect, it is advisable to act on the surface of the crushed ore with ultrasonic radiation. The analysis of Russian and foreign inventions — technologies of ore processing using ultrasound has shown acceleration of mass transfer in the process of ore leaching, significant intensification of the leaching/oxidation process, increase in the degree of extraction of valuable metals, reduction in the duration of the process as a whole. However, due to the high energy consumption of the ultrasonic treatment process, it is important to determine the optimal value of ultrasonic intensity at which the oxide films are removed from the ore grains, but the grains are not destroyed, not crushed. In this work we calculated the optimum value of ultrasonic vibration intensity capable of removing oxide films from the surface of cobalt-coppernickel sulfide ore particles in order to avoid creating a passivating effect on their surface. As the calculation showed, the optimal value of the ultrasound intensity lies in the range from 17 to 28 W/cm2, at a frequency of ultrasonic vibrations of 22000 Hz.

keywords Ultrasonic vibrations, intensity, sulfide ores, oxide films
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