A method for thermally treating pulverulent material, i.e., keeping the material at a certain temperature, the treating temperature, in a desired period of time, in particular sintering, pulverulent material in a cylindrical reaction chamber with an axis slightly inclined to the horizontal after the...http://www.google.fr/patents/US4420303?utm_source=gb-gplus-shareBrevet US4420303 - Method and apparatus for thermally treating pulverulent materials
Method and apparatus for thermally treating pulverulent materials