IMPROVEMENTS RELATING TO THE CALCINATION OF PULVEROUS MATERIAL AND A PLANT FOR EFFECTING THE SAME.

摘要

A method of carrying out at least the partial calcination of a preheated pulverous raw material consisting of or containing lime, the method comprising mixing at least part of che preheated raw material intimately with the fuel necessary for carrying through at least partial calcination, the fuel being either itself a combustible gas or, when meeting the hot pulverous raw material being such that it gives off a combustible gas, in which the material is then suspended the suspension of gas/material being then brought into contact with a flow of oxygen-containing gas in such a manner that the combustible gas burns and the individual particles of raw material are calcined substantially isothermicaly, the raw material particles thus treated being entrained by the total stream of exit gases from the combustion and calcination processes and finally being separated from the stream.