| 摘要 |
PCT No. PCT/FI84/00021 Sec. 371 Date Nov. 2, 1984 Sec. 102(e) Date Nov. 2, 1984 PCT Filed Mar. 5, 1984 PCT Pub. No. WO84/03455 PCT Pub. Date Sep. 13, 1984.The present invention is concerned with a pressure chamber grinder equipment in which finely divided material is ground to ultra-finely divided particles at each other at an elevated pressure. The objective of the invention is to achieve maximal economies of energy and an optimal grinding process. The invention is characterized in that the equipment comprises at least one horizontal plug pipe (1) provided with a feeder funnel and with a push cylinder (2), a pressurized equalizing tank (3) connected to the plug pipe (3), a screw conveyor (4) being passed across the bottom portion of the tank (3) for the purpose of feeding the material in a loose state into a pre-grinder (6), at whose outlet side the material-gas flow is divided into component flows of precisely equivalent speed and composition, which component flows are passed each through a grinding nozzle (10) of its own, of the shape of a venturi tube, into the grinding chamber proper, the nozzles being directed conically towards each other. At the outlet side of the grinder chamber, there is a classifier that returns the coarse fraction straight into the grinding zone in the grinding chamber. |
