METHOD FOR OPERATING CRUSHER, CRUSHING SYSTEM AND CRUSHING PLANT Russian patent published in 2018 - IPC B02C2/00 B02C25/00 

FIELD: mining.

SUBSTANCE: group of inventions relates to a method for operating a mineral material crusher, a system comprising a crusher, and a crushing plant with said system. In the method for operating a mineral material crusher, which comprises first 101 and second 102 crushing elements, defining a crusher gap therebetween, the crusher gap being maintained using hydraulic cylinders 108-110, hydraulic liquid pressure P_M in at least one of the hydraulic cylinders is measured and hydraulic liquid is evacuated from the at least one hydraulic cylinder in case the hydraulic liquid pressure in at least one of the hydraulic cylinders exceeds a set opening pressure limit. During the crushing process following steps are repeated: generating, based on the hydraulic liquid pressure measurement, a representative value of a normal hydraulic liquid pressure in the at least one hydraulic cylinder 108-110, caused by the crushable material in that certain crushing application, comparing the generated representative value and the set opening pressure limit and selecting opening pressure limit P_Th which is higher than the measured normal hydraulic liquid pressure. Crushing system 10 comprises above-mentioned crusher 100 and a control unit 121, configured to receive the opening pressure limit P_Th, which is higher than the measured normal hydraulic liquid pressure. Said opening pressure limit value is determined according to the above-described method. Crusher comprises said crushing system 10.

EFFECT: control method provides safer operation of the crusher.

11 cl, 5 dwg