| 摘要 |
PCT No. PCT/FR94/00309 Sec. 371 Date Jan. 26, 1995 Sec. 102(e) Date Jan. 26, 1995 PCT Filed Mar. 22, 1994 PCT Pub. No. WO94/21380 PCT Pub. Date Sep. 29, 1994A grinding mill comprises a support structure, a frame movable with respect to the support structure, a bottomless bowl supported on the frame, vibrators for imparting circular and approximately horizontal vibrations to the bowl, and a cone fitted inside the bowl and mounted on the support structure for free rotation around an axis of the cone. The speed of rotation of the cone around the axis is measured, the bowl and the cone defining a gap therebetween for receiving a layer of a material to be ground upon rotation of the cone, and for the ground material to be discharged in a discharge plane. A minimum thickness of the layer of ground material in the discharge plane is determined on the basis of a measured value of the cone rotation, and the frequency and/or amplitude of the bowl vibrations is adjusted so as to maintain the minimum thickness of the layer at a set value. |
