After the barite ore grinding plant idles for the specified time, stop the barite ore grinding plant, carefully check all working parts, tighten the lining plate bolts and eliminate the defects found. After there is no problem with the barite ore grinding plant idling, the load test run can be carried out. Load test run shall be gradually fed until full load. Operate for 10-20 hours after normal feeding. The following requirements shall be met during load operation. The work shall be stable without periodic sharp vibration. The current of the main motor has no abnormal fluctuation. The lubrication of each lubricating point is normal, and the temperature of the main bearing shall not exceed 60 ℃. The bolts, Manholes, flange joint surfaces and seals of all working parts of the mill shall be free of water leakage, slurry leakage, etc.