Abstract 1,028,590. Froth flotation apparatus; mixing and agitating apparatus. KLOCKNER-HUMBOLDTDEUTZ A.G. Feb. 5,1964 [Feb. 21,1963], No. 4872/64. Addition to 959, 920. Headings B1C and B2H. The swash plate impeller of the froth flotation chamber described in the parent Specification is modified by the provision of ribs on its underside as well as its upper side and by providing a supply of air to both sides of the plate. As seen best in Fig. 3 the plate rotates in a cage between plates 28 and 29 with an encircling array of baffle ribs 30 to break up air bubbles. The hub 23 on which the plate is mounted provides air channels between radial fins 24 so that air drawn down from the air supply pipe 34 is not only distributed over the top of the swash plate but is drawn also underneath the plate. The float fraction is collected in launders 40 from over weirs 35. The weirs are made of rubber supported by adjustable links 36-38. Two such impellers may be at work in a single chamber and three such chambers be arranged in series as divisions of a single trough. The underflow outlet may be controlled by a needle valve.
A FROTH-FLOTATION CELL COMPRISING A VESSEL FOR LIQUID MEDIUMM, A TUBULAR AIR SUCTION DUCT EXTENDING DOWNWARD INTO SAID VESSEL, SAID AIR DUCT HAVING AN OPEN LOWER END WHOSE OUTLET OPENING IS LOCATED IN THE BOTTOM PORTION OF SAID VESSEL, A DRIVE SHAFT COAXIALLY TRAVERSING SAID AIR DUCT AND PROTRUDING DOWNWARDLY OUT AND SAID OUTLET OPENING, A HORIZONTAL PLATE STRUCTURE MOUNTED IN SAID VESSEL IN FIXED RELATIONSHIP TO SAID DUCT NEAR SAID OUTLET OPENING, SAID HORIZONTAL PLATE STRUCTURE BEING FORMED WITH A HOLE DEFINED BY AN INNER MARGINAL EDGE OF SAID HORIZONTAL PLATE STRUCTURE, SAID HOLE BEING A GREATER DIAMETER THAN THE DIAMETER OF SAID OUTLET OPENING, AND SAID INNER MARGINAL EDGE SUBSTANTIALLY COAXIALLY SURROUNDING SAID OUTLET OPENING SO THAT SAID INNER MARGINAL EDGE AND SAID OPEN LOWER END OF SAID AIR DUCT DEFINE THEREBETWEEN AN ANNULAR LIQUIDINTAKE OPENING, A STIRRER DISC MEMBER MOUNTED ON SAID SHAFT BELOW SAID PLATE STRUCTURE AND HAVING PERIPHERALLY DISTRIBUTED STIRRER VANES ON THE TOP SIDE AS WELL AS ON THE BOTTOM SIDE OF THE DISC, THE INTERIOR OF SAID VESSEL COMMUNICATING FROM BELOW WITH SAID BOTTOM SIDE AND COMMUNICATING FROM ABOVE THROUGH SAID ANNULAR LIQUID-INTAKE OPENING WITH SAID TOP SIDE, WHEREBY ROTATION OF SAID STIRRER
Claim 2
Dependent Claim
200 words
A FROTH-FLOTATION CELL COMPRISING A VESSEL FOR LIQUID MEDIUMM, A TUBULAR AIR SUCTION DUCT EXTENDING DOWNWARD INTO SAID VESSEL, SAID AIR DUCT HAVING AN OPEN LOWER END WHOSE OUTLET OPENING IS LOCATED IN THE BOTTOM PORTION OF SAID VESSEL, A DRIVE SHAFT COAXIALLY TRAVERSING SAID AIR DUCT AND PROTRUDING DOWNWARDLY OUT AND SAID OUTLET OPENING, A HORIZONTAL PLATE STRUCTURE MOUNTED IN SAID VESSEL IN FIXED RELATIONSHIP TO SAID DUCT NEAR SAID OUTLET OPENING, SAID HORIZONTAL PLATE STRUCTURE BEING FORMED WITH A HOLE DEFINED BY AN INNER MARGINAL EDGE OF SAID HORIZONTAL PLATE STRUCTURE, SAID HOLE BEING A GREATER DIAMETER THAN THE DIAMETER OF SAID OUTLET OPENING, AND SAID INNER MARGINAL EDGE SUBSTANTIALLY COAXIALLY SURROUNDING SAID OUTLET OPENING SO THAT SAID INNER MARGINAL EDGE AND SAID OPEN LOWER END OF SAID AIR DUCT DEFINE THEREBETWEEN AN ANNULAR LIQUIDINTAKE OPENING, A STIRRER DISC MEMBER MOUNTED ON SAID SHAFT BELOW SAID PLATE STRUCTURE AND HAVING PERIPHERALLY DISTRIBUTED STIRRER VANES ON THE TOP SIDE AS WELL AS ON THE BOTTOM SIDE OF THE DISC, THE INTERIOR OF SAID VESSEL COMMUNICATING FROM BELOW WITH SAID BOTTOM SIDE AND COMMUNICATING FROM ABOVE THROUGH SAID ANNULAR LIQUID-INTAKE OPENING WITH SAID TOP SIDE, WHEREBY ROTATION OF SAID STIRRER