| 摘要 |
Device for froth flotation of suspensions, especially of fibre suspension, in which the suspension, laden with air by means of an injector which has an essentially tubular mixing chamber, is supplied from the mixing chamber to the flotation vessel, characterised in that the outlet orifice(s) of the tubular mixing chamber are directed towards the bottom of the flotation vessel and are located at least approximately in the central axis and near the bottom of the flotation vessel, and in that the latter has an annular discharge cross-section for the discharge of the suspension from the flotation vessel, which is arranged so as to encompass the latter on its outside, seen radially. Owing to the flow conditions in the, if possible, at least approximately circular-cylindrical flotation cell, which result from this arrangement, strong infiltration of the suspension with very fine air bubbles is achieved with little energy input. The main field of application is the paper industry. |
