| 摘要 |
A process, a means of transferring mineable material from any number of sources to a number of devices capable of separating out values from that mineable material. See (FIG. 1) the mineable material enters the hose (1), the hose (1) being under vacuum, and is transferred in a flow of air to the upper portion of a hopper (2). The hopper (2) is also under vacuum. The flow of air leaves the upper portion of the hopper (2) through hose (4), which is connected, to a vacuum blower (5). The mineable material, being heavier than air is deposited in the hopper (2). The mineable material is removed from the bottom of the hopper (2) by means of a variable speed drive screw conveyor (3) and is transferred to a separation device (8). The level of heavy mineable material (6) contained in the hopper (2), along with the mineable material contained in the screw conveyor (3) causes a seal against the force of vacuum and allows the mineable material to enter and be removed from hopper (2) simultaneously if desired. In order to seal the process against the force of vacuum at process start up a flap check (7) is provided at the exit end of the screw conveyor (3).
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