Version 1
: Received: 23 December 2023 / Approved: 25 December 2023 / Online: 26 December 2023 (10:01:40 CET)
How to cite:
Rulyov, N. The Role of Microbubble Dose in Combined Microflotation of Fine Particles. Preprints2023, 2023121909. https://doi.org/10.20944/preprints202312.1909.v1
Rulyov, N. The Role of Microbubble Dose in Combined Microflotation of Fine Particles. Preprints 2023, 2023121909. https://doi.org/10.20944/preprints202312.1909.v1
Rulyov, N. The Role of Microbubble Dose in Combined Microflotation of Fine Particles. Preprints2023, 2023121909. https://doi.org/10.20944/preprints202312.1909.v1
APA Style
Rulyov, N. (2023). The Role of Microbubble Dose in Combined Microflotation of Fine Particles. Preprints. https://doi.org/10.20944/preprints202312.1909.v1
Chicago/Turabian Style
Rulyov, N. 2023 "The Role of Microbubble Dose in Combined Microflotation of Fine Particles" Preprints. https://doi.org/10.20944/preprints202312.1909.v1
Abstract
Flotation of small particles is one of the global challenges facing the mineral raw materials processing industry. Large amounts of non-ferrous and rare metals are lost in the flotation tailings in the form of mineral particles below 15 µm in size as a result of the low effectiveness of their capture by coarse bubbles generated in conventional flotation machines. The method of combined microflotation, which is being developed in recent years, uses not only coarse but also microbubbles (MB) produced in the stand-alone generator of air-in-water microdispersion, which serves as the flotation carriers. Depending on the dose of MB, the effect of their application may be both positive, but also negative. The theoretical analysis of various mechanisms of particle transfer onto the surface of coarse bubbles and further into the froth layer allowed to obtain the formula for the optimal MB dose f=2dddpρp, where dd is MB size; dp and ρp respectively are the size and the density of particles. Experiments performed on the copper ore flotation tailings at the Atalaya Mining (Spain) and Chaarat Kapan (Armenia) concentrators showed that, besides the optimal MB dose in the range of 1-3 ml/g, there is another optimal MB dose in the range of 10-20 ml/g, where the copper recovery increases by several percent compared to the reference test (f= 0). In the area between the optimal MB doses, the deep minimum in copper recovery is observed, which value is by several percent lower compared to the value in the reference test.
Keywords
fine particles; microbubbles; combined microflotation, particle transfer
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.