| 摘要 |
PCT No. PCT/SE92/00439 Sec. 371 Date Apr. 7, 1993 Sec. 102(e) Date Apr. 7, 1993 PCT Filed Jun. 16, 1992 PCT Pub. No. WO93/00996 PCT Pub. Date Jan. 21, 1993.An arrangement for recording the instant volume of grinding charge in the mill drum of a rotary drum mill of the kind provided with an internal lifting device. In order to enable the volume of grinding charge to be used in a better way as a parameter for controlling mill operation, the lifting device is resilient and is provided with a load detecting device which, during each drum revolution, detects when the lifting device comes into engagement with, and is in engagement with the grinding charge present in the drum and leaves, or is caused to leave, engagement with the grinding charge. The arrangement also includes a tension sensing device which registers the tension on the load detector, this tension being contingent on the load to which the lifting device is subjected by the grinding charge. |
