Concentrator, forced cooling system, protection after shutdown

To improve the availability of concentrators and reduce maintenance time, rapid cooling methods are employed after shutdown. These methods use steam or air as cooling media to cool the concentrator cylinder and rotor. Common techniques in China include:

- **Steam Co-current Cooling**

- **Steam Counter-current Cooling**

- **Air Co-current Cooling**

- **Air Counter-current Cooling**

By properly implementing these methods, the time from shutdown to run-down can be shortened by 2-5 days compared to natural cooling. This not only enhances unit availability but also saves electricity and fuel, particularly during emergency repairs.