The Importance of Choke Feeding a Cone Crusher
(Applies to the Sandvik Cone Crushers UD211, QH331, QH440, US440, and UH440)
Choke feeding your cone crusher is essential to ensure even liner wear, extending the life of the liners and allowing the machine to run smoothly. Proper choke feeding also improves product quality and increases production rate.
A cone crusher that is under-fed causes the cone to be overloaded, leading to concentrated wear on the bowl and mantle liners. Overloading the crusher with incorrect feed material can also damage internal bushings.
Benefits of Choke Feeding a Cone
- Extends liner life by ensuring material covers most of the liner rather than wearing one area excessively.
- Improves the quality and consistency of the product produced.
- Enhances autogenous (rock-on-rock) crushing when the chamber is full.
- Increases the production rate through the crusher.
- Prevents overloads and feed surges.
How to Choke Feed a Cone
- The material in the crushing chamber should be just over the top of the spider frame. Keep the chamber full by regulating the feed rate into the crusher. Adjust the level sensor to maintain material height; the sensor will start and stop the feeder accordingly.
- Changes to the CSS (close side setting) and the crusher eccentric throw will affect the volume of material in the crushing chamber.
- For Sandvik cones, the eccentric throw can be adjusted without replacing any internal parts, allowing fine-tuning of the feed and chamber volume.
