Manufacture of cement clinker in long rotary kilns by the addition of volatile fuel elements directly into the calcining zone of the rotary kiln

Abstract From the Canadian patent

This invention relates to an improved process for the manufacture of cement clinker in a conventional long wet or dry inclined rotary kiln comprising a calcining zone and a clinkering zone, the improvement comprising the steps of processing solid, high volatile fuel having a volatile content of more than about 40% into fuel elements without, containerization of the fuel, wherein the fuel elements are sufficiently large so as to retard and extend pyrolysis and combustion throughout the calcining zone and sufficiently small so as to result in substantially complete combustion before entering the clinkering zone; and charging said fuel elements to the calcining zone of the kiln to provide from …