Dziuba S.V., Dreus A.Yu., Lisenko K.Yе. Gravel filters modeling processes used in field development technologies

Details
Parent Category: Geo-Technical Mechanics, 2018
Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 140

Geoteh. meh. 2018, 140, 188-197

DOI: https://doi.org/10.15407/geotm2018.03.188

GRAVEL FILTERS MODELING PROCESSES USED IN FIELD DEVELOPMENT TECHNOLOGIES

 1DziubaS.V., 2DreusA.Yu., 2LisenkoK.Yе.

1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, 2Oles Honchar Dnipro National University MES of Ukraine

UDC[622.464:51.001.57]:622.271.06

Language: Ukrainian

Abstract.

The article presents a constructed mathematical model for studying heat and mass transfer processes in a dispersed medium of a low-temperature gravel filter in the presence of phase transformations in it. Accounting heat and moisture transfer only in the radial direction as the main assumption greatly simplifies the gravel filter freezing and thawing dynamics  study, but does not take into account the actual design features of the manufacturing and operating gravel filters process in the current technological processes in the development of mineral deposits and processing of the raw mineral. It has been substantiated that coal and manganese ores are enriched by gravity methods, and the proportion of gravity methods is constantly increasing during the processing of iron and polymetallic ores. In this regard, the gravitational enrichment technologies improvement calls for both the analysis and research of hydrodynamic processes occurring during the separation of mineral grains in the apparatus, and the justification of the process equipment parameters. The modern technological processes functioning of pulps desliming, thickening, dehydration and distribution is based on the following equipment usage: jet sump, thickening funnels, conical separators, and also vacuum belt filters, which are presented on the ore preparation technology circuit diagram. Thermophysical characteristics of a dispersed water-saturated medium depend on humidity, therefore, when simulating freezing and thawing of gravel filters, it is necessary to take heat and moisture transfer into account. During the operation of the gravel filter in the technologies of development of mineral deposits, the process of defrosting the monolithic structure of the filter takes place. During the gravel filter operation in the mineral deposits development technologies, the process of defrosting the monolithic structure of the filter takes place. The thermophysical and mass transfer characteristics definition of the system under study is reduced to the determination of the effective multicomponent and multiphase medium heat capacity, which is an additive quantity.

Keywords: gravel filters; field development technologies; a mathematical model for the study of heat and mass transfer processes.

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About the authors:

Dziuba Serhii Vladimirovich, Candidate of Technical Sciences (Ph.D), Senior Researcher in the Department of Geodynamic System and Vibration Tehnologies, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Dreus Andrii Yuliovich, Doctor of Technical Sciences (D. Sc.), Accosiate Professor of Fluid Mechanics and Energy and Masstransfer Depertment, Oles Honchar Dnipro National University MES of Ukraine, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Lisenko Katerina Yevgenivna, Candidate of Technical Sciences (Ph.D), Accosiate Professor of Fluid Mechanics and Energy and Masstransfer Depertment, Oles Honchar Dnipro National University MESof Ukraine, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.