Steel Mill IGCC – Start-Up Failure

Damaged bearing pad and impeller

Bearing load

Lateral analysis

LocationLatvia
ApplicationSteel Mill
Compressor TypeIntegrally geared Centrifugal Compressor
ServiceFurnace air compressor
Power4000 kW
Disch. Pressure50 bara

Challenge

Impeller destroyed twice at first start-up

Solution

  • RCA with rotor-dynamic and metallurgical analyses revealed wrong clearance on bearings
  • New bearing arrangement defined and installed

Result

Compressor started up successfully and running correctly