Production of sulfur from pyrites

Claim 1

FIG-01 THAT METHOD OF ROASTING PYRITES TO PRODUCE SULFUR COMPRISING FEEDING FINELY DIVIDE PYRITES PARTICLES TO A HEATED BED OF DENSE FLUIDIZED INERT MATERIAL THROUGH WHICH GASEOUS PRODUCTS OF REACTION IN SAID BED MOVE AT A TEMPERATURE TO LIBERATE THE LABILE SULFUR ATOM FROM THE PYRITES PARTICLES FED TO THE BED, PASSING A STREAM OF OXYGEN CONTAINING GAS UPWARDLY INTO SAID BED TO FLUIDIZE IT AND CAUSE COMBUSTION OF THE RESIDUAL SULFUR IN SAID PARTICLES IN THE BED WITH PRODUCTION OF IRON OXIDE CINDER, THE AMOUNT OF SAID GAS BEING SUCH THAT SUBSTANTIALLY ALL OF ITS OXYGEN CONTENT IS CONSUMED IN COMBUSTION OF SAID RESIDUAL SULFUR ADJUSTING THE VELOCITY OF SAID STREAM TO EXCEED THE MINIMUM CARRY-OVER VALUE OF SAID CINDER BUT BELOW THE MINIMUM CARRY-OVER VELOCITY OF THE ORE FEED AND OF SAID INERT MATERIAL, WHEREBY SUBSTANTIALLY ALL OF SAID CINDER MOVES WITH THE SULFUR AND THE GASEOUS PRODUCTS OF COMBUSTION, WITHDRAWING FROM SAID SPACE SAID CINDER, SULFUR AND GASEOUS PRODUCTS OF COMBUSTION, SEPARATING THE CINDER FROM THE SULFUR AND GASEOUS PRODUCTS AND CONDENSING AND RECOVERING THE SULFUR.