| 摘要 |
The invention relates to a method for removing solid matter, in particular impurities, by means of flotation from a fibrous material suspension (S), wherein the fibrous material suspension (S) is mixed with gas (L), and wherein in at least two flotation chambers (1, 2, 2′, 2″, 2′″, 2″″) flotation foam (3, 4) is formed that collects solid matter and removes it from the flotation chamber. The flotation foam (4) of at least one flotation chamber (1, 2, 2′, 2″, 2′″, 2″″) is at least partially conducted into at least one other flotation chamber (1), in particular in the flotation foam (3) formed therein. According to the method, the complexity can be reduced, even with high requirements regarding effect and yield. |
| 主权项 |
1. A method for removing solid matter from a fibrous stock suspension by way of flotation, said method comprising the steps of:
mixing the fibrous stock suspension with a gas; forming a flotation foam respectively in at least two flotation chambers, said flotation foam respectively collecting the solid matter and removing the solid matter from said at least two flotation chambers; discharging the fibrous stock suspension, which has been freed of the solid matter, as a through-flow from respectively said at least two flotation chambers; and introducing said flotation foam of at least one of said at least two flotation chambers at least partially into an other of said at least two flotation chambers, wherein the flotation foam to be introduced into the other flotation chamber is introduced in a region which is located between a suspension level and an upper limit of a combined flotation foam. |
