| 摘要 |
The present invention provides a mill (2) having an agitator (20) and grinding chamber (16) which is coated with a non-pigmented, abrasion resistant polymer (14) and a method of using this mill (2) to provide substantially pure ground particles. The polymer coating (14) is typically a thermosetting polymer such as polyurethane or an elastomer such as a fluoroelastomer. The polymer coating (14) provides an abrasion resistant layer between the milling media and the agitator (20) as well as between the grinding chamber (16) and the milling media to prevent spalling, thus increasing the purity of the resultant ground material. The agitator mill (2) may optionally include a ceramic gap separator (62) which is typically formed of stacked plates (66) separated a predetermined distance by shims (64) to separate the ground particles from the milling media in the grinder chamber (16), thus allowing only the ground particles to pass out of the grinding chamber (16).
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