Agitator mill and method of use for low contamination grinding
US6010085A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1999 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Mar 17, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C17/163
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a mill having an agitator and grinding chamber which is coated with a non-pigmented, abrasion resistant polymer and a method of using this mill to provide substantially pure ground particles. The polymer coating is typically a thermosetting polymer such as polyurethane or an elastomer such as a fluoroelastomer. The polymer coating provides an abrasion resistant layer between the milling media and the agitator as well as between the grinding chamber and the milling media to prevent spalling, thus increasing the purity of the resultant ground material. The agitator mill may optionally include a ceramic gap separator which is typically formed of stacked plates separated a predetermined distance by shims to separate the ground particles from the milling media in the grinder chamber, thus allowing only the ground particles to pass out of the grinding chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.