1. Jaw crusher
     Generally, the particle size of natural river pebbles will vary in size. If the average particle size is too large, it is necessary to use a coarse crusher for preliminary crushing, mainly for rough crushing of river pebbles. Jaw crusher mainly uses the mutual extrusion of the movable jaw plate and the static jaw plate to crush the stone. It has the advantages of large crushing ratio, strong wear resistance, high crushing efficiency, simple process flow, and strong adaptability. It is suitable for crushing with high hardness. , Medium hardness, soft ore.      2. Cone crusher
     It mainly uses the lamination principle to finely crush materials, which can crush river pebbles into smaller particle sizes, which is suitable for the secondary crushing stage of medium-hard materials. It has the characteristics of neat grain shape, good wear resistance and high degree of intelligence. There are four main types of cone crushers circulating in the market: spring type, compound type, multi-cylinder hydraulic type, and single-cylinder hydraulic type, which can be selected according to specific crushing needs.