Overflow ball mill operation and maintenance inspection procedures

1. Check all parts of machinery and electrical equipment before driving, check whether the connecting bolts are loose; whether the lubrication points are normal, whether the transmission device is normal and reliable, the protection device is intact, the electrical instrument is sensitive, and the motor carbon brush is in good contact.

2. Drive the car for one week, check the rotating parts of the equipment or around it for obstacles and eliminate it. No one is allowed to stand around when starting.

3. After checking the error, press the start button to start the motor and pay attention to the current change. The ball mill should not start more than twice in a row. The first time and the second time are separated by more than 5 minutes. If it is started for the third time, it must be checked with the electrician and the fitter before starting. Do not start with other equipment, and stagger start to avoid tripping.

4. After the mill is in normal operation, it is necessary to strictly press the provisions of water supply, ore supply and steel ball addition. It is forbidden to operate at an overload, and the idle time is not more than 15 minutes, so as to avoid damage to the liner.

5, in the operation should pay attention to check whether the cylinder leaks, carefully observe the current, voltage, feeding, water supply is normal, every half an hour to check the motor and spindle temperature is not greater than 60 ° С, found problems in a timely manner.

6. During operation, pay attention to observe whether the hollow shaft and the oil ring rotate with oil, and whether the temperature of the hollow shaft is normal. If the hollow shaft is found to be hot, close to the burning tile, the forced cooling measures should be taken immediately, and the parking should not be stopped immediately, so as not to cause the axle to be hung. ". At the same time, pay attention to check the oil quantity and temperature of each lubrication part, and regularly add fuel.

7. Before the ball mill stops, it should stop feeding the mine. After the concentrate is processed in the standby, stop the water supply. Press the parking button and pull down the switch.

8. When there is no notice of power failure, first pull down the knife gate and press the stop button to stop feeding and water supply.

9. After parking, clean up equipment and environmental sanitation to ensure civilized production.

Second, maintenance procedures:

1. The operation and maintenance personnel of the ball mill should be familiar with the structural performance of the equipment and the names, specifications and functions of the various components.

2. The operator should follow the “four-set” principle and lubricate the parts marked with the lubrication diagram. Do not use untreated waste oil to keep the lubrication points clean.

3. During operation, check that the bearing temperature of each part does not exceed 60 °C, and check whether the bolts of each part are loose, whether there is abnormal sound, whether the ore supply water is uniform, whether the cylinder has slurry leakage, and whether the motor current and voltage are normal. Is the transmission part shield intact?

4. Keep the equipment environment clean and hygienic. Except for the operation part, all other parts should be handled at any time.

Third, maintenance procedures

(1) Maintenance period: 1. After 1 month of repair; 2. Minor repair 1 - 3 months; 3. Intermediate repair 12 - 24 months; 4. Overhaul 60 - 120 months.

(2) Maintenance content:

1. Repaired: Mainly check the oil quantity, adjust the gap of each part, strengthen the bolts of each part, replace the individual lining boards or check the wear condition of the lining, and repair the feeder.

2, minor repair: check the cleaning and measurement of the tooth surface wear, check the wear of the lining, replace if necessary.

3. Medium repair: replace the parts of the feeding part, replace the transmission small tooth runner and bearing, and disassemble the reduction gear box. The large gear can be adjusted according to the situation for 3 to 5 years of operation, and the hollow shaft should be measured for 3 to 5 years.

4. Overhaul: disintegration inspection cleaning, measurement, repair or replacement of large gears, hollow shafts, spherical tiles, drive shafts, pinions and cylinders according to wear and tear, repair and replacement of electrical components, after electrical equipment overhaul, must be tested and accepted jobs.

(3) Maintenance standards:

1. The processing surface on the two bearing bases is on the same horizontal plane, the center spacing tolerance is 1mm, the longitudinal centerline non-parallelism deviation is 0.5mm, and the horizontal centerline deviation is 0.5mm per meter.

2, the spherical contact surface of the tile seat should be evenly connected; not less than 1-2 points per 50x50mm2; the contact surface of the hollow shaft and the tile should be 90° - 100° per square inch not less than 2 points, the journal and The gaps on both sides of the bearing are approximately the same.

3. The mating surface of the cylinder flange and the front end cover should ensure good contact. No spacers are allowed. The tolerance of the two hollow shafts is less than 0.8mm. When the large ring gear and the end cap of the cylinder are assembled and corrected, the thrust pin should be firmly pushed and the positioning pin should be placed. The radial oscillation of the ring gear is not more than 0.5mm, and the axial swing is not more than 0.84mm.

4. When installing the lining plate, first install the end cover. The lining of the cylinder should start from the population and follow the assembly requirements. The screws should be evenly tightened and no water leakage. There should be no gaps in the rubber lining, and there should be a sponge to block the gap.

5. The pinion centerline is parallel to the centerline of the large gear, and the deviation is not more than 0.2mm per meter. The tip clearance is 1/4 modulus, the flank clearance is 1.06-----1.8mm, the tooth surface contact area is not less than 50% of the tooth length, and the tooth height is 40%.

6. The transmission coupling of the reducer, motor and drive shaft should maintain high coaxiality. The centerline has different axial degrees of not more than 0.3mm and the centerline inclination is less than 1/1000.

(4) Main wear and scrapping standards:

1. The bearing wear is greater than 1/3 of its thickness.

2. The wear of the pinion surface should not exceed 30% of the tooth thickness. The wear of the large ring gear tooth surface is greater than 25% of the tooth thickness. It can be used on the reverse side and should be scrapped when it is 1/2.

3. The deformation of the ring rim distortion should not exceed 7.5mm.

4. The outer surface of the hollow shaft is filled with grooves, marks or local wear on the inner circular surface to cause deformation of the hollow shaft, and the crack should be replaced.

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