Flotation Apparatus With apertured plate

A flotation apparatus (10) for the separation of solid particles from a suspension while forming a fraction low in solid particles and a fraction rich in solid particles, the apparatus comprising a container (12) having at least one block of slats (29) assembled from slats (22) arranged above one another, an inlet (14) for the suspension, an outlet (16) for the fraction low in solid particles which has been led through the slats, and also having a skimmer device (36) as a mud scraper which has an outlet (18) for the fraction rich in solid particles, wherein at a side of the at least one block of slats (20) oriented towards the container wall there is arranged a plate (26) extending over at least a part of the side of the block of slats (20), with the plate (26) having a plurality of openings (38) which enable the passage of liquid through the plate (26), with the sum of the areas of the individual openings (38) in the upper region of the plate (26), related to the vertical direction, per square centimetre of the plate (26) being larger than the sum of the areas of the individual openings (38) in the lower region of the plate (26) per square centimetre of the plate (26) and wherein the inlet (14) for the suspension is arranged in the lower region of the container and is designed such that it brings about, related to the container cross-section, a central, vertically upwardly directed flow.

A method for the separation of solid particles from a suspension while forming a fraction low in solid particles and a fraction rich in solid particles,

• characterized in that
• this is carried out in a flotation apparatus (10) for the separation of solid particles from a suspension while forming a fraction low in solid particles and a fraction rich in solid particles, the apparatus comprising a container (12) having at least one block of slats (29) assembled from slats (22) arranged above one another, an inlet (14) for the suspension, an outlet (16) for the fraction low in solid particles which has been led through the slats, and also having a skimmer device (36) as a mud scraper which has an outlet (18) for the fraction rich in solid particles, wherein at a side of the at least one block of slats (20) oriented towards the container wall there is arranged a plate (26) extending over at least a part of the side of the block of slats (20), with the plate (26) having a plurality of openings (38) which enable the passage of liquid through the plate (26), with the sum of the areas of the individual openings (38) in the upper region of the plate (26), related to the vertical reaction, per square centimetre of the plate (26) being larger than the sum of the areas of the individual openings (38) in the lower region of the plate (26) per square centimetre of the plate (26) and wherein the inlet (14) for the suspension is arranged in the lower region of the container and is designed such that it brings about, related to the container cross-section, a central, vertically upwardly directed flow.