%0 Journal Article
%T Change in Grain-Size Composition of Lignite under Cyclic Freezing-Thawing and Wetting-Drying
%A Natalia S. Batugina
%A Vladislav I. Fedorov
%J Natural Resources
%P 17-27
%@ 2158-7086
%D 2024
%I Scientific Research Publishing
%R 10.4236/nr.2024.151002
%X The paper presents the change in grain-size
composition of lignite under cyclic <span><span><span style=\"font-family:;\" \"=\"\"><span style=\"font-family:Verdana;\">freezing-thawing
(FTC) and wetting-drying (WDC). The article shows that in</span><span> </span><span style=\"font-family:Verdana;\">th</span><span style=\"font-family:Verdana;\">e
spring and autumn periods the lignites can be subjected to repeat</span><span style=\"font-family:Verdana;\">ed
freezing-thawing and wetting-drying, which determines the possibility of
changing their grain-size composition and structure. Experimental studies in
laboratory conditions on the influence of cyclic freezing-thawing (FTC) and
wetting-dry</span><span style=\"font-family:Verdana;\">ing (WDC) on the quality
indicators of lignites have been carried o</span><span style=\"font-family:Verdana;\">ut, their granulom</span><span style=\"font-family:Verdana;\">etric (fractional) composition has been studied.
Freezing-thawin</span><span style=\"font-family:Verdana;\">g cycle con</span><span style=\"font-family:Verdana;\">ditions are as follows (FTC): minimum exposure
temperature</span></span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">:</span></span></span><span><span><span style=\"font-family:;\" \"=\"\">&nbsp;-</span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">20ˇăC</span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">;</span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"> maximum</span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">:</span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"> +5ˇăC</span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">;</span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"> relative humidity</span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">:</span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">
%K Lignite
%K Freezing-Thawing Cycle
%K Wetting-Drying Cycle
%K Grain Size Composition
%K Dust Coal
%K Storage
%K Loss
%K Quality
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=130737