Apparatus for treating and calcin

Claim 1

APPARATUS FOR THE TREATING OF CARBONACEOUS MATERIALS, COMPRISING IN COMBINATION, A FURNACE OF DUTCH OVEN TYPE HAVING A FIREBOX AND A COMBUSTION CHAMBER, A STACK ARRANGED TO RECEIVE HOT GASES, DIRECT FROM THE SAID COMBUSTION CHAMBER, A HOUSING FORMING A CLOSED, VERTICAL RETORT CHAMBER, WITH A CHARGING INLET AT ITS UPPER END AND AN UNLOADING OUTLET AT ITS LOWER END, VALVE CONTROLLED GAS AND VAPOR OFF-TAKING MEANS LEADING FROM THE TOP END OF THE RETORT CHAMBER, A STEAM DISTRIBUTING MEANS LOCATED IN THE BOTTOM OF THE CHAMBER, STEAM SUPERHEATER COILS IN THE COMBUSTION CHAMBER OF THE FURNACE, A SOURCE OF SUPPLY OF STEAM CONNECTED WITH SAID COILS TO SUPPLY STEAM THERETO, MEANS CONNECTING SAID COILS WITH SAID STREAM DISTRIBUTING MEANS IN THE RETORT, A SHELL ENCLOSING THE RETORT WITH CLEARANCE BETWEEN THEM DEFINING A GAS CHAMBER, MEANS CONNECTING THE SAID CHAMBER AT ITS UPPER END WITH THE SAID STACK, MEANS FOR CONDUCTING GASES OF COMBUSTION FROM THE FURNACE FIREBOX INTO THE LOWER END OF THE SHELL FOR HEATING THE RETORT CHAMBER, TUBULAR ELEMENTS EXTENDING DOWNWARDLY INTO THE RETORT CHAMBER FROM ITS UPPER