The relationship between coke M40 and M25

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Both represent the crushing strength of the cold mechanical strength index of coke quality. Among them, because the specific measurement methods of the two are different, different recording symbols are used respectively. Put 50 kilograms of coke samples with a particle size greater than 60 mm into a Micum drum, rotate it for 100 rpm (4 minutes) at 50 rpm, and then sieve it with a sieve with a hole diameter of 40 mm (or 25 mm). Measure the weight of the coke greater than 40 mm (or 25 mm) as a percentage of the total weight of the coke put into the drum, and record it as M40 (or M25). visible: Both are called crushing strength indicators of coke and have a certain correlation. The coke of coking coal with good coking properties generally has a relatively large value. ； vice versa. The specific quantitative relationship can only be determined after measuring the M40 and M25 values ​​of coke from different manufacturers and performing statistical regression.