Establishing a Linear Relation between the Strength Characteristics M25 and M10 of Coke

On the basis of a mathematical model, a linear relation is established between the coke characteristics determined in drum tests. Specifically, the relation between the abradability M 10 and crushability M 25 is as follows: M 10 = 100 – KM 25 . Analytical methods show that K = 1.00–1.11. As an example, applications of the model are presented, and K is calculated for Russian and Spanish data. The basic model may also be applied to other measures of coke’s mechanical strength, as illustrated for the example of the Irsid indices I 10 and I 20 . Ordinary regression in the analysis of statistical data for M 25 and M 10 proves less informative than the use of the relationship M 10 = 100 – KM 25 . An approach is suggested for finding the physical basis of the linear relation between M 10 and M 25 .