Patent ID: 7993048
Filing Date: 2011-08-09
Classification: E01C,F27B,F27D

Abstract:
1. A rotary material heat treatment apparatus for heat treating particulate material comprising: a rotatable drum having an inlet end and outlet end, a rotatable auger within the drum, the rotatable auger having an inlet end and an outlet end, a material inlet connected to the inlet end of the rotatable drum, a heated material outlet connected to the outlet end of the rotatable drum remote from the material inlet, an auger drive connected to the auger for rotating the auger, a drum drive connected to the drum for rotating the drum, an auger fluid heater connected to the auger for heating the auger with hot fluid, an auger heat inlet connected to the auger fluid heater and to the auger, an auger heat outlet connected to the auger and to the auger fluid heater, a drum heater, surrounding the drum, for depositing material to be treated in the material inlet, moving the materials through the drum while rotating the drum and the auger, heat treating the material in the drum with heat from the drum and heat from the auger lifting and turning material in the drum with the drum and the auger, moving the material through the drum with the auger, and releasing the heat treated material from the drum through the heated material outlet.