Compound Crushers

This design eliminates the need to have several crushing stages by accepting Run of Quarry (RQQ) feed and producing 95 % less than 25 mm. The compound crusher contains in one housing both primary and secondary crushers. Feed enters through the primary inlet into the primary crushing chamber where it is reduced and passed immediately to the secondary crusher. After further reduction the material moves through a grinding path before exiting the housing.

The compound crusher consists of two rotors turning in the same direction. Each rotor contains three to six breaker bars depending on the hardness of the material to be crushed. The secondary rotor turns at a higher speed than the primary. An average figure is 30 to 33 meters per second for the tip speed of the primary and 37 to 40 for the secondary. A maximum tip speed for the primary crusher of between 40 and 45 meters per second can be realized but this results in increased wear on the breaker bars. The speed and the position of the rotors in relation to each other are the main factors affecting the reduction ratios. The secondary crusher has a lighter weight rotor than the primary and is commonly fitted with breaker bars that are of a softer steel.

A compound crusher will crush a wet sticky feed successfully without clogging the machine as there are no grates in the crusher housing and the striker plates can be heated. Compound crushers have high reduction ratios and throughput. They reduce the need for belts and feeders between primary and secondary crushers. Their main field of application is in the limestone and gypsum industry.

Formats Construction Machinery is a vertical shaft impact crusher supplier in china,the company specializes in the R&D and manufacturing of various crushing, grinding, screening and feeding equipment. Founded 20 years ago, the company has provided more than 2,000 solutions for customers around the world. If you need more about the compound crusher or other information just contact our online service. We offer a very convenient online service.