The prices of coking coal and coke are still easy to rise because the supply of high-quality coking coal is still limited. However, due to the limited production of coking plant, it is more likely that coke will rebound after falling.
Coking coal is also called metallurgical coal and main coking coal. It belongs to medium caking and strong caking bituminous coal with low volatile matter. Coking coal is a general term for bituminous coal with high degree of coalification and good coking in China's national coal classification standards.
Coking coal is moderately metamorphic bituminous coal. Romax is 1.35%. Because of its strong cohesiveness, it can produce high-quality coke with high strength, large size, high strength and few cracks, which is the best raw material for coking.
When coking alone, the coking coal has small shrinkage and large expansion pressure, so it is not easy to be pushed out of the coking furnace and it is easy to damage the coke oven. Therefore, it is necessary to add proper amount of gas coal, fat coal or lean coal to coking coal to improve operating conditions, improve coke quality and expand coking coal resources.
Rock characteristics:
Black, glass luster, shell-like or flat fracture, dense and fragile. The stripes are grayish black, containing 80% ~ 85% carbon and 4% ~ 5% hydrogen. Oxygen 5% ~ 10%. The calorific value is 8000~8500% kcal/kg/kg. The volatile matter is about 14% ~ 30%, and the thickness of the colloidal layer is about 8 ~ 25mm.