Repair and maintenance works are in progress on KRD-4 crusher at Norilsk Concentrator

KDR-4 unit crushes cuprous ore from Oktyabrsky and Komsomolsky mines during the first phase of fragmentation process. Its annual production rate averages approximately four million tons. The unit has dimensions of approximately eight by four meters and was originally manufactured by Uralmash. Four of such crushers are currently in operation at Norilsk Concentrator.

The maintenance is scheduled to last approximately eight months during which the crusher will be disassembled and all major elements and control systems will undergo full examination. The scope of repairs also includes rebar installation and concrete casting works to restore crusher footing. This type of repair and maintenance works is carried out for the first time since the crusher was installed at the plant in the early 1980’s.

The works aim to extend the crusher’s unit’s intermaintenance period and improve its reliability, consistency and safety characteristics.