It is the focusproblemfor anthracitic coal productionenterprise to increasepercentageoflump coal and reduce amount of lump coal with size smaller than lower size limit.
There is the further issue of the quality of coal, since the majority of the world reserve is of lower thermal quality than the top-grade anthracitic coal, and will yield less energy per tonne either burned directly or in the form of syngas in ICGC plants.