| 摘要 |
A multi-step wheel is provided for separating heavy metals in the free state from their ores. One embodiment of a separating wheel includes at least two sets of inwardly directed spiral grooves that move from the wheel periphery to a central annulus. A retaining step or ledge area is defined between each groove set for collecting or retaining ore. In another embodiment, the separator wheel is inwardly curved with a decreasing groove depth when moving from the outer periphery to the central annulus. Unique groove designs for the separating wheel are also disclosed.
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