Abstract: The invention relates to a device and a method for chemically and physically separating solid materials from a suspension using flotation. A rotationally symmetrical flocculation/flow reactor is provided with outlets in the lower part thereof and is arranged in a separating tank. At least one suspension inlet extends eccentrically into said reactor. The supplied suspension is guided into said reactor. The supplied suspension is guided into the upper area of the flocculation reactor via the suspension inlet. A circular flow is thus created which drains off from the flocculation reactor downwards in a tangential and radial manner over the outer circumference into circularly arranged distribution cells which reinforce the tangential component of the suspension flow when said flow is delivered into the separating tank. In prior art, the flow of the mixture consisting of the suspension and air-sacs extends radially outwards.

Abstract: A flotation device for separating materials or mixtures of materials from suspensions includes a reaction and mixing space (18) with eccentric inlet (16) for the mixture of suspension particles with gas bubbles and for further transport into at least one centrally arranged vertical suspension distribution tube (26), wherein the suspension distribution tube (26) and the clarified fluid collecting tube (48) are arranged adjacently, the plates (30) surround the suspension distribution tube (26) and the clarified fluid collecting tube (48) in an annular manner; and every second annular plate space (31) between adjacent plates (30) is connected to the suspension distribution tube (26) and every other space (31) between plates is connected to the clarified fluid collecting tube (48), so that the flow takes place out of one space (31) between plates from the inside towards the outside to the separating space (32), and subsequently into an adjacent space (31) between plates from the outside towards the inside.