Gyratory crushers are large, expensive, and heavy-duty machines used in primary crushing. Proper operation is critical to avoid costly breakdowns and ensure safety. Here are the key operating tips for gyratory crusher.
1. Start Only When Ready
- Never start the crusher under load. Clear the crushing chamber first.
- Check that the oil circulation system is working and oil temperature is normal (around 30–40?°C).
- Ensure all guards and safety devices are in place.
2. Feed Evenly and Correctly
- Use a feeder or distributor to spread material evenly around the crushing head. Uneven feed causes uneven wear and vibration.
- Do not feed oversized rocks that exceed the crusher’s design limit – they can jam or damage the main shaft.
- Avoid feeding sticky or wet material that can clog the concave and mantle.
3. Monitor Key Parameters during Running
- Oil pressure and temperature: High temperature means poor lubrication; low pressure indicates leaks or pump failure.
- Current (amperage): Fluctuations suggest uneven feed or a blockage. Consistently high amps mean overload.
- Crusher sound: A loud knocking or rattling noise often means loose manganese liners or broken parts. Stop immediately.
4. Keep the Discharge Open
- Check the discharge conveyor regularly. If material piles up under the crusher, it can cause packing and stall the machine.
- Set the closed side setting (CSS) correctly – too tight will cause overloading, too loose gives poor product size.
5. Stop Properly
- Never stop the crusher with material inside the chamber. Run it empty before shutdown.
- Let the oil system continue running for 10–15 minutes after stopping the main motor to cool down bearings.
6. Daily and Weekly Checks
- Inspect concave and mantle wear. Replace liners before they crack.
- Check head nut tightness – a loose nut can destroy the entire crusher.
- Examine oil filters and change as needed. Contaminated oil is a common cause of bearing failure.
7. Safety First
- Lock out power before any maintenance or entering the crusher.
- Use remote cameras or mirrors to view inside a running crusher – never look directly into the feed opening without protection.
- Train operators on emergency stop procedures.
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