Beneficiation properties of ash-and-slag dumps

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Authors:


M.Hlukhoveria, orcid.org/0000-0001-6099-0219, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

I.Mladetskyi, orcid.org/0000-0002-6159-6819, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

K.Levchenko, orcid.org/0000-0003-0596-0898, Dnipro University of Technology, Dnipro, Ukraine, e-mail: levchenko.nmu@gmail.This email address is being protected from spambots. You need JavaScript enabled to view it.

O.Berezniak, orcid.org/0000-0003-1807-4828, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.


повний текст / full article



Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2022, (1): 046 - 050

https://doi.org/10.33271/nvngu/2022-1/046



Abstract:



Purpose.
Development of a mathematical model for the indices of TPP ash-and-slag waste separation in closed flotation circuit when applying recleaning operations of enriched product.


Methodology.
The methods for calculating separation indices using the separation characteristics of separation processes and calculating the indices of the release of valuable mineral using statistical relationships between the particle size of the inclusion, ash content and particle size distribution function were used.


Findings.
Separation characteristics of rough and recleaning flotation operations were preliminarily determined experimentally, relations that allow calculating the indices of the release of coal particles in ash-and-slag dumps were defined, based on which the functions of particle distribution by their content of valuable mineral fractional composition were found. The separation characteristics of the connections of the separation blocks, including several operations of cleaning of the enriched froth product, were determined. Calculations to determine the quantitative and qualitative separation indices were performed.


Originality.
Analytical relationships to determine the indices of the release of coal inclusions in the process of material from ash-and-slag dumps grinding were obtained.


Practical value.
The established dependencies make it possible to justify the required grinding coarseness to achieve the specified parameters of the enrichment process based on the values of the beneficiation properties of ash-and-slag dumps.



Keywords:
thermal power stations, fly ash, ash-and-slag dumps, coal inclusions release, separation characteristics, flotation

References.


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2. Sklar, L.V. (2016). Ash and slag enrichment technology of Zelenodolska TPP with production of aluminosilicate microspheres. Zbahachennia Korysnykh Kopalyn: Naukovo-tekhnichnyi zbirnyk, 63(104), 36-46.

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9. Bereznyak, A.A., Dreshpak, A.S., & Glukhoverya, N.R. (2019). Research into enrichment of fly ash from thermal power plants on a pneumatic flotation machine of Jameson cell type. Zbahachennia Korysnykh Kopalyn: Naukovo-tekhnichnyi zbirnyk, 74(115), 62-69.

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ISSN (print) 2071-2227,
ISSN (online) 2223-2362.
Journal was registered by Ministry of Justice of Ukraine.
Registration number КВ No.17742-6592PR dated April 27, 2011.

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