The invention relates to the field of coking
coal quality detection, and in particular, relates to a method and device for determining the expansion and shrinkage performance of
coal. The method for determining the expansion and shrinkage performance of the
coal for production comprises the steps: selecting a to-be-determined coal sample as a to-be-determined coal block with standard size; and heating the to-be-determined coal block to a standard
heating temperature, recording sizes of the coal block at various stages in the heating process, and calculating to obtain the maximum
expansion rate and the maximum
shrinkage rate of the to-be-determined coal block. The device for determining the expansion and shrinkage performance of the coal for production comprises a
heating furnace, a coal sample supporting plate, a positioning push plate, a push rod and a temperature controller; a moving pair is formed between the push rod and the furnace wall of the
heating furnace, and the push rod is provided with a scale. The expansion and shrinkage process behaviors of
pyrolysis of the coal for production in a
carbonization chamber are simulated, and the real change conditions of matching coal in the coking
carbonization chamber are reflected, so that the expansion and shrinkage performance of the coal for production is tested, guidance is provided for mutual cooperation of the coal for coking production, and thus the matching coal production cost can be reduced and the
production quality of
coke is increased.