Vertical type roller mill

Details Vertical type roller mill Vertical type roller mill

1984-05-04

1986-08-19

Goldberg, Howard N.

Solid material comminution or disintegration

Apparatus

Plural rotary or oscillatory surfaces cooperate with common...

241121, 241293, B02C 1500

Patent

active

046065067

ABSTRACT:
A vertical type roller mill for grinding a material including a grinding table and grinding rollers of a tire shape in contact with each other. The grinding table has a grinding surface composed of a surface portion constituting a portion of an imaginary conical surface having a apex located on a center axis of the table, and a curving surface portion located outwardly of and contiguous with the surface portion constituting the imaginary conical surface. The grinding rollers each have a grinding surface composed of a surface portion constituting a portion of another imaginary conical surface sharing the apex with the first mentioned conical surface, and a curving surface portion located outwardly of and contiguous with the surface portion constituting a portion of the last mentioned imaginary conical surface and having a greater curvature than the curving surface portion of the grinding surface of the grinding table. The surface portions of the grinding table and grinding rollers each constituting a portion of the respective imaginary conical surface portion define a coarse grinding zone for grinding the material into coarse particles, and the curving surface portions of the grinding table and grinding rollers define a fine grinding zone for grinding the coarse particles of the material into fine particles.

REFERENCES:
patent: 297083 (1884-04-01), Morrow
patent: 3790095 (1974-02-01), Gillette

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