Nadutyy V.P., Suharyev V.V., Kostyrya S.V., Haddad J. Comparative analysis of the complex method of rock mass dehydration and thermal drying

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Parent Category: Geo-Technical Mechanics, 2018

Category: Geo-Technical Mechanics, 2018, Issue 140

Geoteh. meh. 2018, 140, 61-69

DOI: https://doi.org/10.15407/geotm2018.03.061

COMPARATIVE ANALYSIS OF THE COMPLEX METHOD OF ROCK MASS DEHYDRATION AND THERMAL DRYING

¹NadutyyV.P., ¹Suharyev V.V.,¹Kostyrya S.V.,²Haddad J.

¹Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, ²Applied University Al-Balka, Amman, Jordan

UDC622/794:621-1/-9

Language: Russian

Abstract.

Dehydration of mine mass is important technological processes at a booty, processing and enrichment of minerals. Existent methods of dehydration, as a rule, are power-intensive and require the complex equipment. However at their use (except for thermal) remaining moisture of the finished good remains high, that not fully suits of production. Especially it behaves to the small classes of largeness. The article presents a comparative analysis between the complex method of the rock mass dehydration and thermal drying. When comparing, the main factor was taken into account, namely, energy consumed for removing moisture from the material.

The complex dewatering method is one of the promising methods, since it is based on simultaneous use of vibrational, vacuum and electrokinetic effects on the rock mass and is capable to remove humidity from the wet material pores and capillaries during a relatively short time and with minimal energy costs. With the help of vibration, the wet material is continuously transported along the movable operating element of the device. Efficiency of the fluid passaging through the layer of rock mass on a perforated surface is improved with the help of rarefaction in the vacuum chamber. Due to the electrokinetic effect on the wet material, surface tension of the fluid in the capillaries weakens and degree of dehydration increases.

Technologies for processing wet materials apply various mechanical methods of preliminary dehydration with the use of modern equipment. However, all of these methods are limited by technical capabilities and do not give sufficiently deep dehydration. Mechanically, only free and weakly-bound moisture is extracted, and no moisture is removed from the pores and capillaries. Therefore, thermal drying with various sources of heat is used as an auxiliary process for mineral dewatering, but it is the most expensive and energy-intensive process.

A comparative analysis is carried out between the complex dewatering device and a belt dryer (conveyor). They have similar overall dimensions but differ by electricity consumed by the drives, and there is no heat source on the dewatering device. Comparative table of technical characteristics and schematic diagrams of the rock mass dewatering is shown as an example.

Key words: vibration, vacuum, electroosmosis, dehydration, complex method.

References:

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About the authors:

Nadutyy Vladimir Petrovich,Professor, Head of Department of Mechanics of Mineral Processing Machines and Processes, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Suharyev Vitaliy Vitaliyovych, Candidate of Technical Sciences (Ph.D), Senior Researcher of Department of Mechanics of Mineral Processing Machines and Processes, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NASU), Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Kostyrya Sergey Vladimirovich, Junior Researcher in Department of Geodynamic Systems and Vibration Technologies, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NASU),  Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Jamil Haddad, Doctor of Technical Sciences (D.Sc.), Associate Professor, Department of Mechanical Engineering, Al-Balqa Applied University, Amman, Jordan, This email address is being protected from spambots. You need JavaScript enabled to view it.

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