Stone grain shape is not good, needle flake, stone powder content exceeds the standard, the general reason is that the crusher equipment configuration of stone processing production line is not reasonable. As we all know, the crusher using the extrusion principle has high output and poor stone grain shape; while the crusher using impact crushing principle has good stone grain shape.
Therefore, for some soft rock material crushing, the configuration of jaw crusher + impact crusher (shaping) can save investment, and produced stone particle shape is in line with the requirements of mixing station.
For the crushing of hard rock materials, because of the high requirements for crusher wearing parts, the use of impact crusher wearing parts loss is too large; Although the use of cone crusher can save the cost of wearing parts and improve the production efficiency, the content of stone needle flake is high, and the stone grain shape is not so good. Therefore, the combination mode of cone crusher + impact crusher or vertical shaft impact crusher is recommended to ensure the output and the shape of the grain.
Which crusher has the good grain type?
1. Impact crusher
Why the stone aggregate shape produced by impact crusher is good? Let’s analysis the factors that influence the stone aggregates shape. In the production of sand and stone aggregate, the number of collision and collision Angle of stone determines whether the final grain shape is good. So as long as we grasp the collision Angle and collision times, the discharged coarse aggregates are good. The impact crusher is just a reasonable combination of these two factors, so it is not surprising to be able to produce good aggregate products. The impact crusher of Luoyang Dahua Heavy Industry is a three-chamber crushing structure, with good discharging grain type and high efficiency.
2. Vertical shaft impact crusher
The vertical shaft impact crusher uses the high speed impact energy to break, the linear speed of the hammer around the impeller can reach 70-80m/s, and the linear speed of the impact crusher hammer is only 35m/s, so the crushing force of vertical shaft impact crusher is stronger. The working principle of vertical shaft impact crusher is the combination of stone beat stone, and stone beat iron. In the crushing process, the material is impacted and friction from all angles, so the grain shape is very good. But the shortcomings of vertical shaft impact crusher are also more obvious, the feed and discharge are too small, generally not allowed to enter materials more than 60mm. If the sand may be controlled below 40mm, the feed should be as small as possible, in order to improve efficiency and save energy. Therefore, the production line needs to be equipped with jaw crusher, impact crusher or cone crusher for coordination.
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