Barrel-type batch gas carburizing furnace

Abstract

Abstract A ROTARY BARREL-TYPE RETORT IS POSITIVELY DRIVEN, ALONG WITH A PAIR OF ELONGATED SUPPORTING ROLLERS CRADLING THE SAME, BY DRIVE MEANS DISPOSED IN THE ENTIRETY THEREOF EXTERNALLY OF A CYLINDRICAL FURNACE HEATING CHAMBER IN WHICH THE RETORT IS CONCENTRICALLY LOCATED FOR ROTATION. PART LOADING AND UNLOADING CHUTE COMPONENTS ARE AT THE SAME AXIAL END OF THE HEATING CHAMBER, WITH THE RETORT BEING ROTATIVELY SUPPORTED IN PART, IN SUPPLEMENTATION OF ITS CRADLING SUPPORT ROLLERS, BY A TRUNNION AT THE OPPOSITE AXIAL END OF THE HEATING CHAMBER. MEANS FOR ROTATING THE RETORT ARE ASSOCIATED WITH THE TRUNNION, IN COMMON WITH MEANS FOR ROTATING THE RETORT-SUPPORTING ROLLERS, AND IN EACH CASE THE RETORT AND ROLLER DRIVE MEANS ARE ENTIRELY EXTERNAL OF THE HOT HEATING CHAMBER. IN ONE EMBODIMENT OF THE FURNACE DIRECT FIRING GAS BURNERS DISCHARGE PRODUCTS OF COMBUSTION INTO THE HEATING CHAMBER IN A DIRECTION GENERALLY TANGENTIAL OF THE RETORT. IN ANOTHER EMBODIMENT, U-TYPE RADIANT HEATERS ARE EM- PLOYED. ATMOSPHERE GAS IS INTRODUCED TO THE RETORT VIA AN INLET PASSAGE IN THE RETORT JOURNALLING TRUNNION, EMERGING AT THE OTHER RETORT END AND FLOWING INTO THE COMBUSTION CHAMBER THEN OUT THE FURNACE FLUES. A GAS INLET IS ALSO CONTEMPLATED IN THE PART LOADING CHUTE AT A HEATING CHAMBER END, SUPPLEMENTING THE SUPPLY OF ATMOSPHERE GAS THROUGH THE RETORT TRUNNION.

Inventors

• 👤 Edward C Bayer

Bibliographic Details