| 摘要 |
A sample disc assembly is divided into a number of equal sectors separated by vertical radial walls. This assembly is rotated around a vertical center axis in a stream of falling material, such as ore. In one embodiment, one of the sectors has no floor but has a peripheral vertical wall, so that the material falling on this sector falls through and constitutes the sample. All of the other sectors have floors and have no peripheral walls, so that material falling into them is thrown by centrifugal force into an annular space surrounding the disc assembly, where the material is collected as the reject material.
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