Process for the production of cement clinker from fuel shale

An argillaceous and/or calcareous material, such as a fuel shale, for example an oil shale, which is capable of yielding a cement clinker, is subjected to mechanical disintegration by the particles formed thereby to repeated acceleration and retardation within a period of less than about 0.05 second, thereby homogenizing and activating them, and then sintering the disintegrated material at a temperature between about 900 DEG and about 1300 DEG C for a period between about 3 and about 10 minutes, to form a cement clinker. Other materials such as SiO2, CaO and R2O3 (Al2O3 or Fe2O3) may be admixed to improve clinker properties. The sintered clinker may be further subjected to mechanical disintegration in an impact-type disintegration.