INVESTIGATION OF COAL DUST FORMATION UNDER CYCLIC CRYOGENIC INFLUENCES

INVESTIGATION OF COAL DUST FORMATION UNDER CYCLIC CRYOGENIC INFLUENCES

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Дата публикации статьи в журнале: 25.12,2019
Название журнала: Американский Научный Журнал, Выпуск: № (32) / 2019, Том: 2, Страницы в выпуске: 35-37
Автор:
Saint-Petersburg, Saint-Petersburg mining university, Cand. of Science (Engineering)
Автор:
, ,
Автор:
, ,
Анотация: Abstract. Analysis of the need to consider the fractional composition of coal dust in the calculation of the dust load is carried out. The impact of cycles of freezing and thawing on the fractional composition of the dust generated during mechanical destruction of coal marks D are found. To achieve this goal, in vitro experiments were carried out with coal mark D of the Tugnuisky deposit. The collected sample was split into smaller samples and, with the help of mechanical crushing followed by classifying, the following fractions were obtained: 1 mm, 1 + 0.63 mm, 0.4 mm -0.63, -0.4 +0 25 mm, -0.25 mm + 0.2, 0.2 + 0.14 mm, -0.14 mm. For determining the fractional composition of the coal, depending on the degree of hydration was used Camsizer XT installation, which allows obtaining a density distribution of particles in a sample. Altogether were conducted 80 trials, of which 40 - in the natural moisture and 40 - with artificial moisture (full saturation). The experimental results showed that there is a relationship between the fractional composition of the sample, its moisture content and the number of cycles of freezing and thawing. It is shown that the level of dust, depending on the number of cycles at increasing humidity is substantially reduced: by the degree of destruction of 7-fold effect of the dry coal is 1-fold to humidified coal. Also was found the effect size fractions on the degree of destruction. In particular, the processing of the experimental data showed that the initial fraction of less than 0.14 mm output of fine dust does not change, and further research may be excluded from the analysis. The maximum degree of destruction observed dust sample fractions 1 + 0.63 mm, which should be used in determining the impact of man-made laws of moisture on the fractional composition of the dust in the cyclic cryogenic effects. The established regularities will continue to develop the best plan of experimental work to achieve this goal for different marks of coal.
DOI:
Данные для цитирования: Obozhina Elena . INVESTIGATION OF COAL DUST FORMATION UNDER CYCLIC CRYOGENIC INFLUENCES. Американский Научный Журнал. Технические науки. 25.12,2019; № (32) / 2019(2):35-37.

Список литературы: References: Armbrustel L. Measurement and evaluation of dust concentration in different countries, Gljukauf, 1994, vol. 5, no. 6, pp. 19-21. Kacnel'son B.A., Voronin S.A., Selezneva E. Organization of fractional monitoring of air pollution by suspended substances in Russia // Gigiena i sanitarija, 2007, vol. 3, pp. 60-63. Kudrjashov V.V. Nauchnye osnovy gidroobespylivanija shaht Severa (Scientific bases of hydrodedusting of mines in the North), Moscow, Nauka, 1984, 262 p. Romanchenko S.B., Rudenko JU.F. Pylevaja dinamika v ugol'nyh shahtah (Dust dynamics in coal mines, Moscow, Kimmerijskij centr, 2011, 255 p. Bitkolov N.V., Medvedev I.I. Ajerologija kar'erov (Aerology of the quarries), Moscow, 1992, 302 p. Vremennoe rukovodstvo po bor'be s pyl'ju na ugol'nyh razrezah (Interim guidance for dust control in coal open-pits), Moscow, Nedra, 1972. Dvizhkov P.P. Pnevmokoniozy (Pneumoconiosis), Moscow, 1951, 424 p.