| 摘要 |
The invention concerns a method and an arrangement for the output of material from a drum mill that can be rotated around a principally horizontal rotation axis (7) and that has a sieving wall (13) arranged inside the drum at its output end or end wall (2, 10), at which milled mineral material can leave through the sieving wall through sieving openings (18) distributed over a major part of its extent in order to be led in to a number of pulp-lifting chambers (15) distributed around the rotation axis, limited by the sieving wall (13), the said end wall (2, 10), a limiting wall (4') turned in to face the rotation axis, and limiting walls (11 ) that are set radially relative to the rotation axis (7) and that transport material, which limiting walls lead towards a central material output cone (16) by sides that converge towards each other, whereby mineral material that is taken into the pulp-lifting chamber during a lower part (I, IV) of a revolution is emptied down towards the material output cone (16) when the pulp-lifting chamber is located at an upper part of a revolution (II, III). In order to increase the rate of revolution to a value close to the critical rate, mineral material that does not have sufficient time to reach the material output cone (16) during the emptying of the pulp-lifting chamber (15) but returns into the output arrangement is collected in a material collection pocket (21, 35) arranged in the pulp- lifting chamber (15) designed to carry the collected mineral material at a level that is radially closer to the rotation axis (7) than the inner limiting wall (4') of the pulp-lifting chamber, whereby collected mineral material leaves the material collection pocket during a subsequent revolution. |
