Apparatus for conversion of sodium sulphide to sodium sulphite

Claim 1

APPARATUS FOR CONVERTING SODIUM SULPHIDE CONTAINED COMPRISES AN ELONGATED JACKED COOLING CHAMBER IN WHICH THE MOLTEN CHARGE IS SOLIDIFIED AND COOLED, MEANS FOR INTRODUCING THE MOLTEN SMELT INTO SAID COOLING CHAMBER, SCREW CONVEYOR MEANS IN SAID COOLING CHAMBER OPIN A CHARGE OF MOLTEN SMELT TO SODIUM SULPHITE WHICH ERATIVE TO BREAK THE SOLIDIFIED CHARGE INTO PIECES AND DISCHARGE THEM THEREFROM, A MILL PROVIDING A CHAMBER INTO WHICH THE SOLIDIFIED PIECES CONTAINING SODIUM SULPHIDE ARE INTRODUCED AND GROUND TO PROGESSIVELY PULVERIZE THEM, AN OXIDIZING CHAMBER PROVIDING AN OXIDIZING ZONE INTO WHICH SAID PULVERIZED PRODUCT IS CHARGED, A JACKET AROUND SAID OXIDIZING CHAMBER THROUGH WHICH STEAM MAY BE PASSED TO CONTROL THE TEMPERATURE IN SAID ZONE, MEANS INCLUDING AN AIR CONDUIT COMMUNICATING WITH SAID ZONE FOR INTRODUCING AIR INTO SAID ZONE, AND A CONVEYORR MEANS WITHIN SAID OXIDIZING CHAMBER TO MOVE SAID PLVERIZED PARTICLES THERETHROUGH TO STIR THE PARTICLES SO THAT FRESH SURFACE OF THE PULVERIZED PARTICLES ARE CONTINUOUSLY BROUGHT INTO INTIMATE CONTACT WITH AIR INTRODUCED INTO SAID ZONE, CONDUIT MEANS FOR CARRYING SPENT AIR FROM SAID CHAMBERS, A DUST COLLECTOR CONNECTED TO SAID LAST MENTIONED CONDUIT FOR COLLECTING ENTRAINED PARTICLES OF CHARGE CARRIED IN SAID SPENT AIR, ANOTHER CONDUIT CONNECTING SAID DUST COLLECTOR AND OXIDIZING CHAMBER FOR CHARGING THE COLLECTED PARTICLES TO SAID OXIDIZING CHAMBER.