Patent ID: 11925942
Assignee: METSO OUTOTEC USA INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 17:
18. A method for operating a roller crusher for grinding granular material, wherein the roller crusher has two parallel rollers arranged to rotate in opposite directions, towards each other, and separated by a gap, each roller having two ends, the roller crusher comprising:
a flange attached to at least one of the ends of one of the rollers,
the flange extending in a radial direction of the roller,
the flange having a height (H) above an outer surface of the roller, wherein the method comprises at least the steps of:
a) providing at least one mechanical scraper and a remote material removal device consecutive to each other at an end of the roller with the flange, the remote material removal device configured to transmit a material removing beam toward a target area;
b) utilizing the at least one mechanical scraper to at least partially remove material accumulated on the flange and/or on the outer surface at the end of the roller; and
c) utilizing the remote material removal device to at least partially remove material accumulated on the flange and/or on the outer surface at the end of the roller,
wherein step b) is performed continuously and wherein step c) is performed at least intermittently.