Patent ID: 8235219
Filing Date: 2012-08-07
Classification: B07B,F28F

Abstract:
1. A plant for the heat treatment of feedstock having a pre-heater ( 200 ) for pre-heating the feedstock and a rotary tubular kiln ( 300 ) for burning the pre-heated feedstock, characterized in that a device ( 100 ) for separating or classifying feedstock ( 1 ) into at least two different grain fractions ( 2 , 3 ) is arranged between the pre-heater ( 200 ) and the rotary tubular kiln ( 300 ), the device having a screen device ( 5 ) which is formed by rotatable elements ( 8 ), at least one finer grain fraction ( 2 ) falling through between the rotatable elements and means ( 14 ) being provided for supplying a cooling medium to the rotatable elements ( 8 ), and wherein the rotatable elements (