Apparatus for producing carbonaceous materials for electrodes

Claim 1

AN APPARATUS FOR SIMULTANEOUSLY PRODUCING SEPARATE FRACTIONS RESPECTIVELY OF COARSE AND FINE CARBONACEOUS MATERIALS FROM RAW UNGROUND CARBONACEOUS STOCK FOR MIXING TO PRODUCE A MIXTURE SUITABLE FOR MAKING ELECTRODES FOR USE IN ALUMINUM PRODUCTION, COMPRISING A ROTARY GRINDING MILL ADAPTED TO SIMULTANEOUSLY PRODUCE THE FINE AND COARSE MATERIALS FROM SAID RAW STOCK, SAID MILL BEING PROVIDED WITH AN INLET FOR SUPPLYING THE CARBONACEOUS STOCK TO BE GROUND AND AN OUTLET FOR THE DISCHARGE OF THE GROUND MATERIAL, A PARTITION SCREEN IN SAID MILL BETWEEN THE INLET AND OUTLET THEREOF DIVIDING THE MILL INTO S GRINDING CHAMBER AT THE INLET END PORTION OF THE MILL AND INTO A RECEIVING CHAMBER FOR COARSELY GROUND MATERIAL AT ITS OUTLET END PORTION LOOSE GRINDING ELEMENTS IN THE GRINDING CHAMBER, MEANS FOR AIR-SWEEPING THE GRINDING MILL WITH A STREAM OF AIR FLOWING FROM THE INLET THROUGH THE OUTLET OF THE MILL FOR COLLECTING THE FINE MATERIAL AS PRODUCED IN THE MILL, MEANS FOR SEPARATING THE FINE MATERIAL FROM THE AIR STREAM TO PROVIDE THE FINE FRACTION, MEANS FOR CONVEYING COARSE MATERIAL FROM THE RECEIVING CHAMBER THROUGH THE OUTLET OF THE MILL AND ADJUSTABLE MEANS IN THE RECEIVING CHAMBER FOR SELECTIVELY DELIVERING COARSE MATERIAL IN THE RECEIVING CHAMBER INTO SAID CONVEYING MEANS.

Claim 2

AN APPARATUS FOR SIMULTANEOUSLY PRODUCING SEPARATE FRACTIONS RESPECTIVELY OF COARSE AND FINE CARBONACEOUS MATERIALS FROM RAW UNGROUND CARBONACEOUS STOCK FOR MIXING TO PRODUCE A MIXTURE SUITABLE FOR MAKING ELECTRODES FOR USE IN ALUMINUM PRODUCTION, COMPRISING A ROTARY GRINDING MILL ADAPTED TO SIMULTANEOUSLY PRODUCE THE FINE AND COARSE MATERIALS FROM SAID RAW STOCK, SAID MILL BEING PROVIDED WITH AN INLET FOR SUPPLYING THE CARBONACEOUS STOCK TO BE GROUND AND AN OUTLET FOR THE DISCHARGE OF THE GROUND MATERIAL, A PARTITION SCREEN IN SAID MILL BETWEEN THE INLET AND OUTLET THEREOF DIVIDING THE MILL INTO S GRINDING CHAMBER AT THE INLET END PORTION OF THE MILL AND INTO A RECEIVING CHAMBER FOR COARSELY GROUND MATERIAL AT ITS OUTLET END PORTION LOOSE GRINDING ELEMENTS IN THE GRINDING CHAMBER, MEANS FOR AIR-SWEEPING THE GRINDING MILL WITH A STREAM OF AIR FLOWING FROM THE INLET THROUGH THE OUTLET OF THE MILL FOR COLLECTING THE FINE MATERIAL AS PRODUCED IN THE MILL, MEANS FOR SEPARATING THE FINE MATERIAL FROM THE AIR STREAM TO PROVIDE THE FINE FRACTION, MEANS FOR CONVEYING COARSE MATERIAL FROM THE RECEIVING CHAMBER THROUGH THE OUTLET OF THE MILL AND ADJUSTABLE MEANS IN THE RECEIVING CHAMBER FOR SELECTIVELY DELIVERING COARSE MATERIAL IN THE RECEIVING CHAMBER INTO SAID CONVEYING MEANS.