The rapid development of infrastructure foundation and the increase in demand for sand and gravel have promoted the accelerated development of urban construction. The construction industry needs to use a large number of high-quality sand and gravel aggregates, 1-2 pebbles, 1-3 pebbles, 2-4 pebbles, 4-6 stone and 0-5 sand, as common specifications in sand and gravel aggregates, are also demanded by mixing stations around the world. The sand and gravel factories in various regions of the country are gradually emerging with the needs of the society, but the final stone produced by each sand and gravel factory will be different, which may be caused by the inappropriate selection of equipment and the unreasonable configuration of production line equipment. The type is not ideal, and the result is that the price cannot go up, or even slow sales. These problems are relatively common, so how to avoid these situations? How to solve this problem?
The grain shape of the stone is not good, the needle flake and the stone powder content exceeds the standard. The general reason is that the equipment configuration of the stone processing production line is not reasonable enough. We all know that the crusher using the extrusion principle has high output and poor stone particle shape; the crusher using the impact and impact crushing principle has good stone particle shape.
Therefore, for the crushing of some soft rock materials, only the configuration method of jaw crusher + impact crusher (shaping) can be used, which can save investment and produce stone grain shapes that meet the requirements of the mixing station.
For the crushing of hard rock materials, due to the high requirements on the consumable parts of the crusher, the use of counterattack breaking consumable parts is too much loss; although the use of cone crusher saves the cost of consumable parts and improves production efficiency, the stone needle piece. The grain content is high, and the grain shape of the stone is not very good. Therefore, it is recommended to use the combination mode of cone crusher + impact crusher, which not only ensures the output, but also ensures the particle shape.
What kind of crusher has the function of shaping, and the stones produced are in good shape?
Impact Crusher
Why can the impact crusher make the aggregate produced in a good shape? Then we have to analyze the factors that affect the grain shape of sand and gravel aggregate. In the production of sand and gravel aggregate, the number of collisions and the angle of collision of the stone determine whether the final grain shape is good. So as long as we grasp the collision angle and the number of collisions, the natural rules of the coarse aggregate come out. The impact crusher is just a reasonable combination of these two factors, so it is not surprising that it can produce a good finished aggregate product. There are two-chamber impact crusher and three-chamber impact crusher in impact crusher. Obviously, the three-chamber impact crusher has a better aggregate size because of the more collisions.
Vertical Impact Crusher
The Vertical impact crusher uses high-speed impact energy to break, and the linear speed of the hammer head around the impeller can reach 70-80m/s, while the linear speed of the counterattack hammer is only 35m/s. Therefore, the crushing force is still stronger than the impact crusher. The crushing principle of the impact crusher is a combination of “stone beat stone” and “stone beat iron”. During the crushing process, the material is impacted and rubbed from all angles, so the particle shape is very good. However, the disadvantages of impact crusher are also obvious. The feeding and discharging are too small. Generally, it is not allowed to feed more than 60mm. If the sand is made, it may be controlled below 40mm, and the feed should be as small as possible to improve efficiency and save energy. Therefore, the production line needs to be equipped with a jaw crusher, an impact crusher or a cone crusher.
To sum up, if the grain shape of our existing stone production line is not good, we can replace the equipment with bad grain shape with crushing equipment that is conducive to grain shape optimization, or configure a shaping machine for the production line. If you purchase production line equipment, you need to carefully consult the manufacturer about the shape of the finished product, and choose carefully.