Apparatus for effecting fluidization

Claim 1

APPARATUS FOR EFFECTING FLUIDIZATION AND SUSPENSION ROASTING OF METALLIC SULFIDE ORE WHICH COMPRISES IN COMBINATION, AN ENLARGED CONBUSTION CHAMBER FOR ROASTING FINELY DIVIDED IRON SULFIDE ORE PARTICLES SUSPENDED IN A GASEOUS MEDIUM, A SECOND SMALLER FLUIDIZATION CHAMBER EMBODIED IN THE BOTTOM OF SAID FIRST CHAMBER WITH THE UPPER PORTION OF SAID SECOND CHAMBER EXTENDING UPWARDLY INTO SAID FIRST CHAMBER AND THE LOWER PORTION OF SAID SECOND CHAMBER EXTENDING DOWNWARDLY FROM THE BOTTOM OF SAID FIRST CHAMBER, THE BOTTOM WALLS OF THE FIRST CHAMBER BEING SPACED FROM THE UPPER WALLS OF THE SECOND CHAMBER TO FORM AN ANNULAR TROUGH FOR THE COLLECTION OF CINDER SETTLING IN SAID FIRST CHAMBER TO PERMIT DISCHARGE UPPER PORTION OF SAID SECOND CHAMBER TO PERMIT DISCHARGE THERETHROUGH OF GAS AND FINELY DIVIDED SUSPENDED SOLID PARTICLES INTO THE FIRST CHAMBER, A PERFORATED PLATE IN THE BOTTOM OF THE SECOND CHAMBER ADAPTED TO SUPPORT A BED OF SOLIDS, AN ORE FEED INLET INTO THE SECOND CHAMBER ABOVE THE PERFORATED PLATE, AN INLET INTO THE SECOND CHAMBER BELOW THE PERFORATED PLATE FOR THE INTRODUCTION OF GAS TO MAINTAIN A BED OF SOLIDS THEREIN IN A FLUID STATE, A GAS INLET INTO THE FIRST CHAMBER FOR THE INTRODUCTION OF AIR, AND AN OUTLET NEAR THE TOP OF THE FIRST CHAMBER FOR THE DISCHARGE THEREFROM OF GAS CONTAINING SO2.