Rotary feeder wth metal removing means
US4896836A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Dec 30, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C13/286
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A hammer mill (10) having a feeder section (14) connected vertically above a mill section (12) such that feed material from a feed supply containing tramp metal (46) is introduced into the feed section and is divided therein into discrete quantities which are poured at a predetermined rate into the mill section. A continuously rotating feeder member (28) is situated in the vertically upper portion of the feeder section, the feeder member including means (40) for transporting a discrete quantity of feed material from a first position where the quantity is separated from the feed supply to a second position where the quantity is poured toward the mill section. A continuously rotating drum magnet (44) is situated below the rotating feeder member such that the quantities of feed material fall toward the drum magnet as the quantities are poured. In this manner, the tramp metal in the feed material is magnetically captured by the drum magnet and the remainder of the feed material falls into the mill section. The tramp metal is detached from the drum either passively as a result of differential magnetization of the drum, or actively by a wiper blade or air stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.