SAFETY
Original Paper
UDC 622.807© B.P. Pernebek, Yu.V. Semenov, A.A. Rybichev, L.O. Kozlova, 2023
ISSN 0041-5790 (Print) • ISSN 2412-8333 (Online) • Ugol’ – Russian Coal Journal, 2024, № 1, pp. 70-75
DOI: http://dx.doi.org/10.18796/0041-5790-2024-1-70-75
Title
ASSESSMENT OF THE EFFECTIVENESS OF WETTIBILITY OF COAL DUST AT DIFFERENT SOLUTION TEMPERATURES
Authors
Pernebek B.P.1, Semenov Yu.V.1, RybichevA.A.1, KozlovaL.O.1
1National University of Science and Technology “MISIS” (NUST “MISIS”), Moscow, 119049, Russian Federation
Authors Information
Pernebek B.P., Postgraduatestudent, e-mail: pbektur@mail.ru
Semenov Yu.V., PhD (Engineering), Associate Professor, e-mail:7231234@bk.ru
Rybichev A.A., Postgraduatestudent, e-mail: rybichev@yandex.ru
Kozlova L.O., assistant, e-mail: voloshenyuklyubov@gmail.com
Abstract
The urgency of the problem is justified by the need to improve the anti-dust complex of measures, the effectiveness of which is increased by chemical treatment of water.Studies have been carried out on the wettability of coal dust from seams of grades Zh, GZh, B. Based on the results of sedimentation time, the wettability of brown coal dust with solutions of surfactants is 2 to 5 times better than the wettability of coal dust of grades Zh, GZh with the same solutions.Sorption of the wetting agent by coal dust at wetting agent concentrations from 0.3% to 1% occurred below the maximum possible sorption capacity of the wetting agent by coal dust.For temperatures of wetting agent solutions from 5 to 60 ?С, it was found that surface tension in the entire range of temperatures studied decreases by 1.12 times, and with an increase in wetting agent concentration from 0 to 3.5%, surface tension decreases by 1.6 times,the effect of concentration on reducing surface tension is 1.5 times more effective compared to increasing the temperature of the wetting agent.The results obtained can be used to evaluate solutions planned for thermal-humidity chemical treatment of coal mass for the purpose of dust binding.
Keywords
Coal dust, Dust wettability, Surface tension, Contact angle, Heat of wetting, Concentration, Dust deposition time.
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For citation
Pernebek B.P., Semenov Yu.V., Rybichev A.A. & Kozlova L.O. Assessment of the effectiveness of wettibility of coal dust at different solution temperatures. Ugol’, 2024, (1), pp. 70-75. (In Russ.). DOI: 10.18796/0041-5790-2024-1-70-75.
Paper info
Received October 30, 2023
Reviewed November 13, 2023
Accepted December 7, 2023
