Process of classifying granular mixtures

Claim 1

THE CONTINUOUS PROCESS OF CLASSIFYING MIXTURES OF CEMENT MAKING SOLIDS, WHICH COMPRISES MIXING SUCH MIXTURES WITH SUFFICIENT WATER ONLY TO MAKE A PUMPABLE SLURRY SUITABLE FOR INTRODUCTION DIRECTLY INTO A KILN, ESTABLISHING AND MAINTAINING A BODY OF SUCH SLURRY IN A HOLLOW GENERALLY CONICAL SPACE OF DECREASING DIAMETER THAT IS CONFINED BY A CLOSED AND SMOOTH SURFACE OF REVOLUTION NEAR ITS WIDE END WITH AN AXIAL OUTLET AT ITS APEX AND ANOTHER AXIAL OUTLET AT ITS WIDE END, FORCE-FEEDING SUCH PUMPABLE SLURRY INTO THE CONFINED BODY TANGENTIALLY AT ITS WIDEST PART FOR ESTABLISHING AND MAINTAINING TWO CONCENTRICVORTICES IN THE BODY ROTATING IN THE SAME DIRECTION ABOUT THE AXIS OF THE BODY BUT WITH OPPOSED FLOW COMPONENTS WITH THE INNER VORTEX ROTATING MORE RAPIDLY THAN THE OUTER VORTEX, DICHARGING FASTER SETTLING SOLIDS FROM THE OUTER VORTEX THROUGH THE APEX OUTLET WHILE DISCHARGING SLOWER SETTLING SOLIDS THROUGH THE OTHER OUTLET, AND FEEDING THE SLURRY TO THE BODY WITH A CONTROLLED PRESSURE NOT LESS THAN ABOUT FOUR KILOGRAMS PER SQUARE CENTIMETER TO DEVELOP CENTRIFUGAL FORCE AND CONCOMITANT CENTRIPETAL FLOW EACH SIGNIFICANTLY SUFFICIENTLY IN EXCESS OF THE FORCE OF GRAVITY