Gravel: it is a kind of unformed stone, which is in a natural state after mining. Irregular shaped stones obtained by blasting or manual excavation are called random rubble, and rough rubble with two parallel faces is generally over 300mm, with a mass of about 20-30kg. Its strength should not be less than 65,438+00 MPa, and its softening coefficient should not be less than 0.8. It is often used for filling soil, laying foundations and retaining walls.

Crushed stone processing equipment:

1, jaw crusher. It is generally used for head crushing and coarse crushing, and the feed has a large particle size. Based on the working principle of extrusion crushing, the crushing cavity is composed of two jaw plates, the moving jaw and the static jaw, which simulates the movement of the animal jaw to complete the crushing operation. Because of its optimized motion parameters, the crushing cavity is deep, there is no dead zone, the crushing ratio is larger and there is no material blockage. The wedge is used to adjust the discharge port, which reduces the labor intensity and downtime of workers, and the particle size is uniform, which is beneficial to the secondary crushing treatment. At the same time, the integrated structure of the motor base and the main engine makes the installation easier and saves the occupied space.

2. Impact crusher. A new generation of stone crusher developed in combination with the specific industrial and mining conditions of domestic sand and gravel industry is generally used for secondary crushing, medium and fine crushing, or as a shaping machine in production line, using impact energy to crush materials. The new concept crushing technology can meet the crushing requirements of different material specifications and fully meet the requirements of the new process of "more crushing and less grinding". The gap between the impact plate and the plate hammer is easy to adjust, and the discharging granularity is effectively controlled. At the same time, a large number of new high wear-resistant materials are used, which reduces the wear of worn parts, prolongs the replacement cycle and saves costs.

3. Hammer crusher. It is an upgraded product with a large entrance, which can be used for coarse/medium/fine crushing. The material is crushed by the impact of the hammer, and the modular design is carried out by changing the type and conversion of the cavity. One-step molding is unnecessary, which reduces the process flow, reduces the cost, improves the production efficiency and saves manpower and material resources. Its working hammer is cast by a new process, which has few wearing parts and convenient maintenance.