Method and apparatus for the two-stage crushing of brittle mater

Details Method and apparatus for the two-stage crushing of brittle mater Method and apparatus for the two-stage crushing of brittle mater

1987-12-10

1988-11-08

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

With classifying or separating of material

241 29, 241 35, 241 80, 241152A, B02C 2500

Patent

active

047830115

ABSTRACT:
A method and apparatus for the two-stage crushing of brittle material comprising a roll mill and a mill connected downstream thereof, the output of the second mill being delivered to a sifter in which a second branch stream of the grit obtained in the sifting operation is returned to the roll mill and a further branch stream is returned to the second mill. A first control circuit keeps the sum of the quantity of fresh material and the quantity of grit constant, while a second control circuit divides the quantity of grit into two branch streams in such a way that the drive power of the roll mill remains constant.

REFERENCES:
patent: 4690335 (1987-09-01), Allers et al.
patent: 4726531 (1988-02-01), Strasser

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