Attrition mill

Details Attrition mill Attrition mill

1979-07-20

1981-02-24

Lazarus, Richard B.

Solid material comminution or disintegration

Apparatus

Comminuting surface provided with openings to permit...

241 83, 241285A, B02C 1702

Patent

active

042522803

ABSTRACT:
The cylindrical rotating grate of an attrition mill is constructed by welding a group of bars in close spaced parallel relationship, and then rolling this assembly into a cylindrical configuration. The meeting ends of this configuration are then welded, and an opening is preferably cut from the rolled assembly. The area cut out in the process of forming the opening is used as a cover. The grate structure includes solid abutments interengagable with the cover to hold the cover in position against the large forces encountered during the operation of the mill, with relatively light securing means adapted to hold the cover in engagement with these abutments. A housing surrounding the rotating grate is provided with an opening through which the machine is charged with material, and this opening is covered by a curtain preferably provided with battens and a weight to hold it in position. A vacuum is applied to the interior housing for the removal of dust, which assists in holding the curtain in position.

REFERENCES:
patent: 288745 (1883-11-01), Tustin
patent: 518011 (1894-04-01), Stedman
patent: 1964920 (1934-07-01), Ladrie
patent: 3491958 (1970-01-01), Zucchini
patent: 3730442 (1973-05-01), Harris
patent: 4136832 (1979-01-01), Mouta et al.

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