The optimal arrangement for a cone crusher is to choke feed it with a non-segregated feed. This will help the crusher run more smoothly by lowering both power and pressure peaks and improving overall performance.
Choke feeding is about maintaining a constantly high level of evenly distributed material in the feed hopper. The recommended level will depend on a number of factors – crushing stage, crusher model, crushing chamber and the risk of bridging (see Chapter F for more information on bridging). However, at a minimum the head nut should always be covered by the feed material.
We have a few other straightforward recommendations on the subject of choke feeding:
Electrically connect and interlock the feed arrangement, so it cannot be started before the crusher and the discharge system are running.
Consider using a Sandvik feed-level sensor to monitor the level of material in the feed hopper. An interlock systems will prevent overfilling.
Coupling a variable speed feeder with the feed-level sensor will help you maintain a constant material level in the hopper. A pre-crusher surge bin with a low-level monitor connected to the control system can also ensure proper feeding.