Method and device for separating particulate material

Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Separating means

Reexamination Certificate

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C209S480000, C209S482000, C209S505000, C209S451000

Reexamination Certificate

active

07448500

ABSTRACT:
A method of separating particulate material of differing size or density including the steps of: tumbling the particulate material to produce continuous or discrete avalanches (19) in the surface of the particulate material to move particles of smaller size (14) or higher density (22) towards the centre of the particulate material and particles of larger size (16) or lower density (24) radially outward from the centre of the particulate material; and extracting particles at selected radial locations (8, 10). A device for separating particulate material of differing size or density is also provided.

REFERENCES:
patent: 327707 (1885-10-01), Moffit
patent: 2872300 (1959-02-01), Pollock
patent: 3804249 (1974-04-01), Gibbons et al.
patent: 4070202 (1978-01-01), Nollet
patent: 1458031 (1989-02-01), None
patent: 1458031 (1989-02-01), None
patent: 1458031 (1989-02-01), None
patent: 1632520 (1991-03-01), None
patent: 1715446 (1992-02-01), None
patent: 1715446 (1992-02-01), None
patent: 1715446 (1992-02-01), None
Supplementary European Search Report for EP Appln. No. 02750658.
Chinese Office Action for Chinese Appln. No. 02816731.7.
H. Henein et al., “Experimental Study of Transverse Bed Motion in Rotary Kilns,” Metallurgical Transactions B, v. 14B, pp. 191-192, Jun. 1983.

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