Coke (greater than 20 mm in size) — Determination of mechanical strength

A sample of coke greater than 20 mm in size and of known size distribution is subjected to mechanical stresses ina rotating drum. The degree of breakdown of the coke is evaluated by a process of sieving and size analysis after 100 drum revolutions (Micum test) and, if desired, after 500 drum revolutions (Irsid test).