Abstract 973,396. Froth flotation apparatus; agitating apparatus; aerating liquids. BOLIDENS GRUVAKTIEBOLAG. July 5, 1963 [Aug. 3, 1962], No. 26768/63. Headings B1C and B2H. A froth flotation chamber has an impeller with blades 23 on a base plate 22, the gap between the ends of the blades 23 and a surrounding array of baffle plates 11 being fed with a curtain of air bubbles from an air supply ring 24. The supply ring comprises three sections supplied from a main 29 by feeders 27 and is preferably of rubber with a bonded soft iron stiffener. The rubber is slitted or slotted underneath, the slitted version allowing the ring to seal itself against backpressure. The ring may carry discharge nozzles. Coarse and fine fractions of pulp are admitted through ports 3 and 4 and leave through ports 6 and 7 to a chamber with an outlet weir 9, 10. Froth is paddled into a launder 16 by rotating blades 15.
IN A FROTH FLOTATION APPARATUS HAVING A TANK, INLETS FOR THE PULP INTENDED FOR FLOTATION, OUTLETS FOR THE TAILING, AN OVERFLOW FOR THE FORTH, AND A MEANS FOR CIRCULATION AND AERATION OF THE PULP IN THE TANK, THE IMPROVEMENT WHEREIN SAID MEANS COMPRISES: A DISC TYPE AGITATOR IN SAID TANK ROTATING ABOUT A VERTICAL AXIS, SAID AGITATOR MOVING THE PULP WHICH IS ADJACENT THERETO IN A UNIFORM, SUBSTANTIALLY HORIZONTAL, RADIAL STREAM OUTWARDLY FROM THE CENTER OF THE AGITATOR AND BEYOND THE PERIPHERAL EDGE THEREOF; A PLURALITY OF BAFFLES FIXED RELATIVE TO SAID TANK, SAID BAFFLES BEING UNIFORMLY DISTRIBUTED AROUND AND SPACED FROM SAID AGITATOR, AND POSITIONED AT SUBSTANTIALLY THE SAME LEVEL AS THE AGITATOR SO AS TO INTERCEPT THE SUBSTANTIALLY HORIZONTAL, RADIAL STREAM OF PULP THEREFROM; A RING-SHAPED AIR FEEDING ELEMENT SUBSTANTIALLY COAXIAL WITH SAID AGITATOR AND SAID BAFFLES, SAID ELEMENT IN A RADIAL DIRECTION BEING POSITIONED BETWEEN SAID BAFFLES AND THE PERIPHERY OF SAID AGITATOR, BUT IN AN AXIAL DIRECTION BEING OFFSET FROM SAID AGITATOR, SAID RING-SHAPED ELEMENT FURTHER HAVING AIR FEEDING OPENINGS SPACED ENTIRELY THEREAROUND WHICH ARE DIRECTED
Claim 2
Dependent Claim
180 words
IN A FROTH FLOTATION APPARATUS HAVING A TANK, INLETS FOR THE PULP INTENDED FOR FLOTATION, OUTLETS FOR THE TAILING, AN OVERFLOW FOR THE FORTH, AND A MEANS FOR CIRCULATION AND AERATION OF THE PULP IN THE TANK, THE IMPROVEMENT WHEREIN SAID MEANS COMPRISES: A DISC TYPE AGITATOR IN SAID TANK ROTATING ABOUT A VERTICAL AXIS, SAID AGITATOR MOVING THE PULP WHICH IS ADJACENT THERETO IN A UNIFORM, SUBSTANTIALLY HORIZONTAL, RADIAL STREAM OUTWARDLY FROM THE CENTER OF THE AGITATOR AND BEYOND THE PERIPHERAL EDGE THEREOF; A PLURALITY OF BAFFLES FIXED RELATIVE TO SAID TANK, SAID BAFFLES BEING UNIFORMLY DISTRIBUTED AROUND AND SPACED FROM SAID AGITATOR, AND POSITIONED AT SUBSTANTIALLY THE SAME LEVEL AS THE AGITATOR SO AS TO INTERCEPT THE SUBSTANTIALLY HORIZONTAL, RADIAL STREAM OF PULP THEREFROM; A RING-SHAPED AIR FEEDING ELEMENT SUBSTANTIALLY COAXIAL WITH SAID AGITATOR AND SAID BAFFLES, SAID ELEMENT IN A RADIAL DIRECTION BEING POSITIONED BETWEEN SAID BAFFLES AND THE PERIPHERY OF SAID AGITATOR, BUT IN AN AXIAL DIRECTION BEING OFFSET FROM SAID AGITATOR, SAID RING-SHAPED ELEMENT FURTHER HAVING AIR FEEDING OPENINGS SPACED ENTIRELY THEREAROUND WHICH ARE DIRECTED