In order to make the flotation machine operate normally and efficiently, in addition to normal operation and maintenance, it must be timely repaired, and the faults occurring in the operation of the equipment should be handled and eliminated in time. The common faults and treatment methods of the mechanical agitation flotation machine in operation are shown in Table 1.
Table 1 Common faults and treatment methods of flotation machine
Fault phenomenon | cause of issue | Approach |
Partial liquid surface | 1. The impeller and the cover are not installed properly. One side of the axial gap is large, one side is small, and the side of the gap is large 2. The cover is partially damaged by the impeller 3. Steady flow plate defect 4. The pipe joint is loose | 1. Adjust the gap 2. Replacement 3. Repair 4. Fastening |
Insufficient inflation or sinking | 1. The impeller cover is seriously worn and the clearance is too large 2. Impeller cover installation clearance is large 3. The motor speed is not enough 4. The inflation tube is blocked or the nozzle is closed. 5. The pulp circulation is too large or too small | Replace 2. Re-adjust 3. Check the motor speed 4. Clean or open 5. Close small or open the loop hole |
Insufficient suction or running water in front groove | 1. The feed pipe is worn and leaked 2. The mine pipe is too large and the amount of feed is small. 3. The middle chamber is blocked by coarse sand 4. The contact between the mine pipe and the tank wall is not good (the gasket is damaged and the screw is loose) | Replace 2. Partial blockage of the mine pipe 3. Water pipe flushing 4. Repair |
The intermediate chamber or the discharge bin does not discharge the slurry. | 1. Groove wall wear and tear 2. Block or loosen the mine pipe 3. Impeller cover damage | Repair 2. Overhaul 3. Replace |
Liquid level can't be adjusted | 1. The gate screw is tripped, and the bottom of the gate is perforated or rusted. 2. The gate is over-adjusted (reverse misalignment) | 1. Replacement and repair 2. Gate reset |
The suction groove has a large amount of scraping, and the DC slot cannot be scraped out. | Mostly because the DC slot does not open the circulation hole gate | turn on |
Concentrate trough | If the dose is appropriate, the pipe is blocked. | dredge |
The spindle is not up and down properly. | 1. Ball bearing damage 2. The impeller mass is unbalanced, the main shaft swings, and the impeller cover collides 3. The cover is damaged 4. Drop foreign objects in the trough 5. Spindle top cover is loose 6. Impeller cover clearance is too small | Replace 2. Overhaul 3. Replace 4. Take out 5. Fastening 6. Retuning |
Bearing heating | 1. Bearing damage, ball rupture 2. Lack of lubricating oil or poor quality | Replace 2. Add, change oil |
Spindle pulley swing and bracket swing | 1. The pulley is not installed properly 2. The bracket bolt is loose 3. The seat plate is not flat 4. Impeller mass imbalance | 1. Reloading, adjusting 2. Fastening 3. Leveling 4. Replace |
The motor is hot and the phase current is increased. | 1. Excessive sand accumulation in the tank 2. Shaft damage 3. Cover plate and release tube 4. The mine pipe is worn out and the circulation is too large. 5. Air cylinder wears out, the circulation is too large 6. Motor single-phase operation | 1. Dosing, sanding 2. Replacement 3. tighten 4. Replace 5. Replacement 6. Overhaul |
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