| 摘要 |
<p>A store for gravity de-watering slurry has a first space (2, 44, 54) and a second space (13, 45, 55) separated by a water-permeable wall. Water can only flow out from the second space via means, such as a weir (A, B, 62) which can be gradually lowered, such that as the solids settle the weir can be reduced and at each stage the clear top layer of water be released. Flow of slurry from the first to the second space causes progressive deposition of solids in the interstices of the wall, thus improving the filter action.</p> |
