The medium-speed coal mill has always been one of the best-selling models in ore grinding machinery, loved by many customers for its sturdy and wear-resistant quality as well as its super high performance. However, even the most robust and durable machines can have a day of breakdown. Once a medium-speed coal mill malfunctions, it must be shut down to identify the cause, and it should not be forcibly restarted to avoid danger. Below are common faults of medium-speed coal mills and their repair methods:
1. The finished material is too coarse or too fine.
1. The analysis machine blades are severely worn and do not perform classification.
Solution: Maintenance can be performed as needed, such as replacing blades if they are severely worn.
2. The air volume of the fan is inappropriate.
Solution: Adjust the air volume according to actual needs.
3. The rotation speed of the analysis machine is inappropriate.
Solution: Adjust the rotation speed of the analysis machine.
2. No powder is produced or the powder output is low.
1. The powder lock is not properly adjusted, and poor sealing causes powder backflow.
Solution: Check and adjust the sealing of the powder lock, and block any leaks found.
2. The scraper blade is severely worn and cannot scoop up material.
Solution: Replace the scraper blade and grinding roller, and magic ring.
3. The main machine has a loud noise and significant vibration.
1. The feed amount is small or the main machine and the transmission device are not aligned, with no gap between the two couplings, and the anchor bolts are loose.
Solution: Adjust the feed amount, correct the coaxiality, and adjust the gap between the two couplings.
2. The material is hard, causing large impacts or no material layer.
Solution: Control the hardness of the feed and the feeding speed of the feeder.
3. The grinding roller and grinding ring are severely deformed.
Solution: Replace the grinding roller and grinding ring.
4. Fan vibration.
1. Powder accumulation on the blades or uneven wear.
Solution: Remove powder accumulation from the blades or replace the blades.
2. The anchor bolts are loose.
Solution: Tighten the anchor bolts.
