Науковий вісник НГУ

Beneficiation properties of ash-and-slag dumps

• 
• 

User Rating:  / 0

PoorBest 

Details

Category: Content №1 2022

Last Updated on 25 February 2022

Published on 30 November -0001

Hits: 4075

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.

1. Kasimov, A.M., & Udalov, I.V. (2015). Study on the processes of migration of ions of heavy and rare metals in soils in the zone of placement and accumulation of ash and slag waste. Visnyk Kharkivskoho Natsionalnoho Universytetu imeni V.N.Karazina, Seriya Heolohiya. Heohrafiya. Ekolohiya, (43), 189-200. https://doi.org/10.26565/2410-7360-2015-43-29.

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.

3. Khlopitsky, A.A., & Makarchenko, N.P. (2013). Prospects of utilizing ashes and slag waste of thermal power plants. Universum: Tekhnicheskiye Nauki, (1). Retrieved from https://7universum.com/ru/tech/archive/item/790.

4. Chernyavsky, N.V., Rohman, B.B., Provalov, A.Yu., & Kosyachkov,A.V. (2015). Experience in imported coal combustion in boiler units of TPPs and TPSs. Energotekhnologii i resursosberezheniye, (4), 15-23.

5. Chernyavsky, N.V. (2012). Influence of enrichment of thermal coals on their calorific value and combustion efficiency at thermal power plants. Zbahachennia Korysnykh Kopalyn: Naukovo-tekhnichnyi zbirnyk, 49(90), 10-21.

6. Mingaleeva, G.R., Shamsutdinov, E.V., Afanasyeva, O.V., Fedotov, A.I., & Ermolaev, D.V. (2014). Modern trends in the processing and use of ash and slag waste from thermal power plants and boiler houses. Sovremennyye problemy nauki i obrazovaniya, (6). Retrieved from http://www.science-education.ru/ru/article/view?id=16475.

7. Jameson, G. (2012). The effect of surface liberation and particle size on flotation rate constants. Minerals Engineering, (36-38), 132-137.

8. Osborne, D.G., Huynh, L., Young, M.F., Sherritt, G., Perrin,M.J., & Collins, A.R. (2014). Factors Affecting Design Optimisaton of Fine Coal Cleaning Circuits and Impacts on Value-in-use. The Southern African Institute Of Mining and Metallurgy, South Africa, Symposium Series, (79), 137-156.

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.

10. Mladetsky, I.K., & Akhmetshina, I.V. (2014). The principle of forming a separation block. Zbahachennia Korysnykh Kopalyn: Naukovo-tekhnichnyi zbirnyk, 56(97), 72-77.

11. Levchenko, K.A., Pilov, P.I., & Mladetsky, I.K. (2014). Methods for analytical calculation of technological indicators of mineral processing. Zbahachennia Korysnykh Kopalyn: Naukovo-tekhnichnyi zbirnyk, 56(97), 66-74.

• < Prev
• Next >