摘要:
A process for separating a fibre suspension wherein undesired impurities, such as printing ink and other contaminating substances, are separated from the fibres in a flotation tank and the fibre suspension in admixture with gas is introduced into the tank via directed jets having a high inlet velocity. The tank has inlet openings for the mixture of suspension advantageously located at or close to the bottom of the tank and the jets of suspension are directed upwards, towards the free surface of the suspension in the flotation tank.
摘要:
An apparatus for the high-level clarification of liquids containing suspended solid particles, which comprises a flotation tank (1) that forms a flotation cell (20) or region provided with an inlet (2) for the liquid to be clarified, which is supersaturated with gas, characterized in that it comprises, on at least one portion of the lateral surface that delimits the flotation cell, a filtration element (22) that separates the flotation cell (20) from a region (30) for collecting the liquid subjected to high-level clarification, which is achieved by flotation and subsequent filtration.
摘要:
Die Erfindung betrifft einen Injektor oder Mischer für Flotationseinrichtungen insbesondere für Fasersuspensionen, mit in Strömungsrichtung veränderlichem Querschnitt des Strömungskanals zum Eintrag eines Gemisches aus Gas und Suspension in die Einrichtung. Die Erfindung ist dadurch gekennzeichnet, daß in Strömungsrichtung wiederholt Verengungen und Erweiterungen des Strömungskanals oder zueinander paralleler Strömungskanäle vorgesehen sind.
摘要:
A combination of raw coal and water is introduced as a slurry (23) into a vessel (12). Chemicals are introduced at a feed inlet. The mixture is reduced by interaction with a bed of agitated (15,16) grinding balls (14). Air is introduced into the lower portion of the vessel and forced upwardly through the circuitous passages among and between the grinding balls. The rising air bubbles carry the more hydrophobic product upwardly into a froth compartment (34) of the vessel (12) and through a discharge outlet (36) of the vessel. Wash water (37) is introduced into the upper portion of the vessel and descends through the froth and the ball passages carrying entrained and less hydrophobic particles into the grinding chamber (40). The non-floatable material flows downwardly from the grinding chamber (40) to a refuse zone (42) for discharge (45) as refuse from the vessel.