Morus V., Ohorodov V., Pelykh I., Lypska H., Havrosh O., Chaika M. Fine screening of coal slurry using drum-type aggregates on rubber dynamically active belt sieves interacting with non-rigid elastic-stress systems

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Parent Category: Geo-Technical Mechanics, 2024

Category: Geo-Technical Mechanics, 2024, Issue 168

Geoteh. meh. 2024, 168, 71-87

https://doi.org/10.15407/geotm2024.168.071

 

FINE SCREENING OF COAL SLURRY USING DRUM-TYPE AGGREGATES ON RUBBER DYNAMICALLY ACTIVE BELTSIEVES INTERACTING WITH NON-RIGID ELASTIC-STRESS SYSTEMS

Morus V., Ohorodov V., Pelykh I., Lypska H., Havrosh O., Chaika M.

M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine

UDC 621.926.086: 622.33: 622.74

Language: English

Abstract. A set of laboratory experiments was carried out to define regularities of fine screening and dehydration of coal slurry, using dynamically active belt sieve of a drum-type screen, and identify the rational operating conditions and design parameters of cleaner for dynamically active belt sieve openings to improve indicators of coal slurry sieving and dehydrating, which operation involves initiating centrifugal forces. To implement the laboratory-based program, a test bench was developed with the closed power supply cycle; laboratory drum-type screen, equipped with dynamically active belt sieve, and elastic non-rigid stress strained system for the forced cleaning of the openings, i.e. forced cleaning system «Ramrod» with a transport spiral. Moreover, certain methods were developed to carry out the research. The possibility to finely separate a liquid phase from the slurry-like mixture for the dynamically active belt sieve using forced cleaning system «Ramrod» with a transport spiral as a cleaner of its openings was evaluated. Relying upon the experimental results, the influence by the movable cleaner with a transport spiral was defined as well as the influence by design and technological parameters of the drum-type screen on the process of a liquid phase separation from coal slurry which grade is +0.5 mm. The experiments showed that high screening efficiency of coal slurry and low humidity percentage within the finished product result from the following: balanced ratio of the output in terms of input power; inclination angle of the screen drum; and frequency and rotation direction of the developed cleaner of dynamically active belt sieve openings creating such a moving mode of coal slurry through dynamically active belt sieve of the rotating screen drum, under which impact of initiating centrifugal forces operates maximally. The use of the developed screen hole cleaner of a drum screen with a conveying spiral allows you to effectively solve the problems of high-performance discharge of wet and clumping materials, which are classified in drum-type units. In this way, opportunities and prerequisites will be provided for the creation of equipment that combines the processes of preliminary dewatering and de-sludging by screening, as well as final dewatering on centrifuges.

Keywords: screening process efficiency, coal slurry, elastic-stress deformed «Ramrod» system with a transport spiral, drum-type screen, dynamically active belt sieve.

REFERENCES

1. Beilin, M.I. (1969), Teoreticheskiye osnovy obezvozhivaniya ugley [Theoretical foundations of coal dehydration], Nedra, Moscow, Russia.

2. Zvyagilskiy, E.L., Filimonov, P.E. and Morus, V.L. (2012), “Dry fine and fine screening of wet raw coal before beneficiation”, Geo-Technical Mechanics, no. 101, pp. 63–83.

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About the authors:

Morus Volodymyr, Candidate of Technical Sciences (Ph.D.), Leading Researcher in Department of Underground Mining at Great Depths, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Ohorodov Volodymyr, Leading Engineer in Department of Underground Mining at Great Depths M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Pelykh Ihor, Candidate of Technical Sciences (Ph.D.), Scientific Researcher in Department of Mechanics of Mineral Processing Machines and Processes, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0009-0002-9899-7875

Lypska Halyna, Chief Designer in Department of Mechanics of Mineral Processing Machines and Processes M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0009-0002-6370-8690

Havrosh Oleksandr, Leading Engineer in Department of Mechanics of Mineral Processing Machines and Processes, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0009-0006-2292-9090

Chaika Mykola, Constructor in Department of Mechanics of Mineral Processing Machines and Processes, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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