Configuration of granite sand production line

Speaking of granite, I believe everyone is familiar with it. It belongs to hard rock, and its saturated uniaxial ultimate compressive strength is greater than 30MPa.This kind of rock usually can be processed through rough, medium and fine crushing and shaping steps. The configuration of the granite processing production line will be briefly introduced, and it is also suitable for materials that are difficult to crush or costly to break, such as basalt, diabase, andesite.

1. Granite properties

Granite is a high-quality building stone with a uniform structure, a hard texture and a beautiful color. The density is 2790 ~ 3070kg / m³, the compressive strength is 1000 ~ 3000kg / cm², the elastic modulus is 1.3 ~ 1.5x106kg / cm³, and the water absorption is 0.13 %, Shore hardness> HS70, specific gravity 2.6 ~ 2.75. For this type of hard rock, the crushing process is generally used before subsequent use.

2. Crushing mechanism and equipment

According to the different finished products, the crushing process can be divided into coarse crushing section, medium crushing section, fine crushing section and grinding section. General materials can be divided into coarse crushing + medium crushing, coarse crushing + medium crushing + fine crushing Or coarse crushing + medium crushing + fine crushing + shaping three major types of process engineering, shaping is generally to make the obtained product better in shape. The crushing products commonly used in the whole crushing process are as follows: Jaw crusher is used in the first crushing process of the crushing line, which can crush large particles with a compressive strength not exceeding 320MPa to a size of 100mm ~ 300mm.

Impact crusher can generally process ore or rock with a compressive strength of up to 350 MPa under 500 mm, and the crushed materials are cubic particles. The impact crusher is generally used in the second crushing process of the crushing line. It can also be used as the first crushing process for materials with small feed. Cone crusher adopts the principle of lamination crushing to form a protective layer of material. It has the characteristics of reliable structure, high crushing efficiency, easy adjustment, and economical use. The feed particle size is 13 ~ 369mm. Cone crushing is the same as the impact crushing. It is often used in the second crushing process of the crushing line. It can also be used as the first crushing process for materials with small input materials. However, the feed particle size of cone breaking is generally smaller than that of counter-breaking.

Sand making machine is suitable for the crushing and shaping of soft, medium hard and extremely hard materials. It is generally used as the last process of the crushing sand production line.

In addition to the main crushing equipment, some auxiliary equipment such as vibrating screens, feeders and conveyors are needed to complete the configuration and work of this production line.

3. Configuration of granite crushing production line

Due to the hard texture, the granite production line configuration generally needs to pass through three stages, namely the coarse crushing of the jaw crusher (first breaking), the medium and fine crushing of the cone crusher (second breaking) and the sand making and shaping of the sand making machine (shaping) .

The large granite material reaches the vibrating feeder through the silo for uniform feeding, and then enters the jaw crusher for the first crushing. The coarsely crushed material is screened by the vibrating screen according to the requirements and then transported to the cone crusher by the belt conveyor The machine performs the second fine crushing. After medium and fine crushing, the circular vibrating screen is used for sieving, and the larger particle materials are returned to the cone crusher and crushed again. Materials that meet the requirements enter the sand making machine for further crushing and shaping. If the materials need to be cleaned, they can be sent to the sand washing machine for cleaning. Finally, the materials that meet the requirements are sorted and packaged according to different particle size ranges.