摘要:
A process for the separation of foreign matter from a liquid, which process comprises mixing a stream of contaminated liquid containing dissolved gas with a stream of induced gas to provide a multi-phase flow, subjecting the multi-phase flow to turbulence and shearing thereby to produce a well dispersed bubbly liquid stream, passing the bubbly liquid stream into a vessel which contains the liquid contaminated with foreign matter, below the free surface of the liquid, and allowing the bubbles of gas to rise to the surface of the liquid, the surface adherence between the gas bubbles and the particles of foreign matter causing the particles of foreign matter to float to the surface of the liquid. Also provided is an apparatus for the separation of foreign matter from a liquid and a nozzle for the production of a bubbly liquid.
摘要:
L'aération de dispersions, en particulier l'aération de suspensions de matières fibreuses dans une installation de flottage (1) est effectuée au moyen d'un injecteur annulaire (2) auquel l'air est amené par des canaux d'amenée d'air (11) jusque dans le parcours de mélange (4). La fente annulaire qui se forme dans l'injecteur annulaire (2) est ainsi aérée à l'intérieur et à l'extérieur. La pièce médiane (7) qui se rétrécit en direction de la plus grande section transversale libre (Q4) de l'injecteur annulaire (2) est dotée d'une nageoire (56) empêchant la rotation de la dispersion.
摘要:
Minerals and metals are separated from a crushed ore mixture of crushed ore, aqueous solution, and flotation agent by allowing the mixture to fall freely from one or more outlets (11) into a container (1), so entrapping air during the free fall and encouraging the development of a large quantity of froth. Air entrainment is enhanced by passing the mixture to the outlets (11) via a header (9) in which air is drawn in through an air inlet pipe (39).
摘要:
A froth flotation apparatus for elimination of solid particle impurities contained within a liquid includes a sparger (42) naving a substantially cylindrical porous element (46) mounted on a tubular shaft (48) which is rotatably mounted within the inlet conduit (20) of the apparatus and driven by a motor. Compressed air is forced through the porous element to aerate fluid entering the apparatus.
摘要:
A dissolved gas flotation apparatus (10) comprises: - a flotation tank(18) having an upstream contact zone separated by a baffle (9) from a downstream clarification zone; - one or more pressure reduction nozzles (28) arranged to discharge into the contact zone of the flotation tank (18); - a flow-straightening arrangement including two or more plate-like barriers (104) in the contact zone of the flotation tank (18), wherein: each barrier (104) has walls, the walls of the barriers (104) together defining flow paths in a desired direction; and each barrier (104) provides a barrier to horizontal flow perpendicular to the desired flow direction.
摘要:
Die Erfindung betrifft eine Flotationsvorrichtung (1) und deren Verwendung, umfassend ein Gehäuse (2) mit einer Flotationskammer (2a) zur Aufnahme einer Suspension und mindestens einem Einlass für die Suspension (5a), sowie mindestens eine Schaumsammeleinrichtung (3) zur Aufnahme und Abführung eines Schaumprodukts (SP), welche an einer Oberseite des Gehäuses (2) angeordnet ist, wobei weiterhin mindestens ein Fluidverteilerelement (4) zur Erzeugung einer in Richtung der mindestens einen Schaumsammeleinrichtung (3) gerichteten Strömung oberhalb des mindestens einen Einlasses in der Flotationskammer vorhanden ist, dessen vertikale Position (4a) oberhalb des Einlasses (5a) in der Flotationskammer (2) veränderbar ist.