Cement vertical roller mill installation

Cement vertical roller mill installation

Cement vertical roller mill finish grinding in the cement industry has been paid more and more attention, which is a requirement for grinding technology of high efficiency, low power consumption, simplified process system by cement factory. New cement plants of cement vertical mill finish grinding must first stand-alone debugging, the purpose is for equipment manufacturing, installation quality and comprehensive inspection, at the same time an important assessment of electrical automation and the use of DCS system performance, to control, the scene of each equipment control requirements, ensure consistency reliability and the action of equipment operation and display.

The main equipment debugging in opposite mill, should be the safety of the equipment as the premise, according to the first auxiliary rear main, after the first addition principle, in turn, also must pay attention to the following points:

1) mill main drive confirmation before start: the thin oil station, hydraulic station reliable operation, separate operation parameters of normal, scene simulation fault reaches the design requirements; the main, auxiliary roller have all risen to high and can keep no drop phenomenon; no abnormal sound slow driving run time; no debris and disc closed grinding door; the main motor has a separate no-load test run. The boot should first confirm the operation direction. No-load operation should not be less than 4 hours, and the temperature of bearing; oil pressure, flow and temperature of circulating lubrication system rise; import and export water temperature for the detailed record.

2) powder selecting machine selection bearing powder machine manual filling dry oil to the bearing with an oil; manual turning without polishing the shell phenomenon; starting powder selecting machine should be allowed to start in the low speed for 3-5 minutes, no abnormal situation will gradually speed up to the highest. With a tachometer, in the process of speed in the whole process of vibration detector.

3) the main fan before starting to confirm the main air door completely shut down, and the action is flexible; no debris fan and pipeline; motor has separate commissioning; electrical tuning meets the design requirements. Start stable after the main door and gradually open to the maximum, the observation of the current and the temperature of bearings and record. Trial run without load matters should be confirmed:

  • signal between the control room, power distribution room, site contact accurate, smooth communication.
  • the equipment in the control room operation station packet rev, stop.
  • system correct interlocking relationship, emergency shutdown and interlock is reliable and accurate.
  • the operation of the monitoring picture of each analog display signal correctly, valves, flexibleoperation, accurate and reliable valve position indicator. Sound and light alarm signal is reliable.

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