The paper presents the change in grain-size
composition of lignite under cyclic freezing-thawing
(FTC) and wetting-drying (WDC). The article shows that inthe
spring and autumn periods the lignites can be subjected to repeated
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-drying (WDC) on the quality
indicators of lignites have been carried out, their granulometric (fractional) composition has been studied.
Freezing-thawing cycle conditions are as follows (FTC): minimum exposure
temperature:？-20°C; maximum: +5°C; relative humidity:
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