The crushing and screen process is the crushing procedure composed of crushing machine and screening machine. The types of crushing process should be decided according to different crushing sections and different combinations of crusher and screen.

The basic forms of crushing section are: single crushing operation, a crushing section with pre-screening works, a crushing section with check-screening works，and the crushing sections with pre-screening and check-screening works. The difference is that the former is the pre-screening and check-screening conducted on different screens, and the latter is conducted on the same screen. 

The purpose of pre-screening is to screen the ore smaller than the discharge opening from the raw materials, so as to relieve the crusher work load.

The purpose of check-screening is to screen the crushed ore which are large than the discharge opening to ensure to get the qualified products.

Luoyang Dahua can design the optimal crushing and screening process according to the customer condition, provide the high quality crusher machine. Through several decades development, the company follows the market trend, researches green and environmental protection equipment,provide large benefits for the customer. Welcome the home and abroad customer contact us: www.lydhcrusher.com or lydhchina@huazn.com