The hammer crusher breaks into shape at one time. Why do the sand and gravel aggregate production lines use impact crusher more? Regarding the crushing sand making equipment, many friends asking which is easier to use. Ordinary hammer crushing is cheap and the process is simple. Can I use hammer crushing to make sand? Affected by technology and cost, many small production lines in the past would consider using hammer crushing to make sand without requiring the shape and quality of sand. However, the general sand production line is matched with equipment such as coarse crushing crusher, medium crushing crusher, fine crushing crusher, sand making machine, etc., with good output granularity and good quality.
To put it simply, the sand and gravel aggregate line is rarely broken with a hammer, for two main reasons:
1. The discharging grain is not good (1, 2 gravel is okay)
Although the process of hammer crushing sand is simple, the yield is low, it is easy to be crushed, and there are many powdery materials. In addition, the finished aggregate will produce micro-cracks and low compressive strength, which affects the quality of the aggregate and also affects sales. Hammer crushing is mainly used for crushing.
2. Serious loss
Hammer crushing is suitable for processing medium and soft ore, such as limestone, coal gangue, dolomite, shale, etc. It cannot handle materials with high hardness, otherwise the hammer will wear quickly, the replacement frequency is high, and the increase in cost will also delay production.
Why are there more impact crushers in the sand aggregate production line?
1. Processing materials
Because of the difference in technical structure and working principle, the impact crusher can not only handle softer materials, but also harder materials, while the hammer crusher can only handle materials with lower hardness. Because there is no grate bar at the bottom of the impact crusher, the product size is determined by the gap between the impact plate and the hammer head, so when the water content of the processed material is too large, it can effectively avoid the phenomenon of blocking the grate bar when crushing wet materials. The hammer crusher increases the possibility of clogging due to the factor of the bottom grate, so it cannot handle materials with high humidity. In comparison, the impact crusher has a wider working range.
2. Maintenance cost
In the early purchase, the price of counterattack is generally higher than that of hammer. However, due to the difference in structure and work between impact crusher and hammer crusher, there will be certain differences in later maintenance. The wear of the hammer of the impact crusher only occurs on the side facing the material, and the metal utilization rate of the hammer of the impact crusher is relatively high. At the same time, the impact crusher frame part is a three-part structure, only need to open the rear casing of the crusher; you can replace the hammer, impact plate, liner and other maintenance operations, and the impact of the crusher parts. The interchangeability is strong, and the variety of wearing parts is small, which is convenient for the purchase and management of spare parts. The hammer crusher has many hammer heads, and replacing a set of hammer heads takes a lot of time and manpower, and the maintenance and maintenance costs are high. The broken rotor, bottom screen, grille, etc. may also be worn during work, and replacement is relatively complicated.
The hammer breaking we are talking about here is more of the traditional ordinary hammer breaking. The performance of the new type of hammer breaking is much improved. Of course, the price will not be as cheap as the ordinary hammer breaking. Through the above comparison, it can be known that if the material processed by the sand and gravel plant is harder or softer, the impact crusher is more inclined. On the contrary, the hammer crusher is selected. At the same time, it can also reduce the later operating cost of the equipment and improve its economy benefit.