PROTECTION DEVICE FOR THE INLET END OF A ROTARY DRUM FURNACE

摘要

A protective device for a discharge end of a tubular rotary kiln comprises a flange extending radially outwardly of the metal kiln shell, a metallic ring affixed to the flange and arranged concentric with the shell at the discharge end, and a refractory ring covering the metallic ring and the front face of the flange. Two sleeves concentrically surrounding the external surface of the metal shell to define respective inner and outer annular chambers through which cooling air is circulated to cool the rear face of the flange, a space between the metallic ring and the internal surface of the metal shell communicating with the outer annular chamber through a passage between the rear face of the flange and the discharge end, and with the inner annular chamber through a port in the metal shell spaced inwardly of the discharge end.