Friends who know the stone production line should all know that in order to make the sand and stone grading more reasonable and the product grain shape more beautiful, most of the stones are coarsely crushed and then subjected to secondary crushing processing. Therefore, the second stage of stone crushing equipment. Selection is very important. So, what kind of equipment should be used for the second stage crushing of the stone production line? Let’s take a look together.
What is the secondary stone crushing equipment?
- Impact crusher
Impact crusher is one of the commonly used secondary crushing in stone production line. It is mainly used for the processing of soft materials with compressive strength not exceeding 350 MPa. The feed size is not more than 500 mm, and the output size can be adjusted by the impact frame and rotor. The gap between them is generally adjusted below 60mm; there are many models, different models, and the output size is also different. The capacity range is between 30-800 tons, which can be selected according to actual needs.
The impact crusher belongs to the impact crushing principle, which mainly relies on impact energy to crush materials. Therefore, the hammer and impact liner are particularly easy to wear and need to be replaced frequently, especially when crushing materials with higher hardness; the impact crusher crushes the material. The finished product has a very good grain shape, a cubic shape, and a certain stone shaping function, which can save the sand making process. - Cone crusher
The cone crusher is also common equipment for secondary stone crushing, but the cone crusher is more suitable for crushing materials with higher hardness. It mainly relies on the gyrating movement of the crushing cone in the cone cavity of the shell to produce squeezing, splitting and bending effects on the material. To complete the stone crushing operation.
Cone crusher has a large crushing ratio, high crushing efficiency, low equipment failure rate, and the product is not easy to be crushed. However, the grain shape of the finished product is not very good. For those with higher requirements on the grain shape, a sand making machine needs to be installed in the back.
How to choose the second stage crushing of sand and gravel production line?
Both impact crusher and cone crusher are commonly used secondary crushing equipment in stone factories. Each has advantages and disadvantages. I can’t say which is better, I can only say which is more suitable for our own sand and gravel production line.
If you need to crush materials with low hardness like limestone, etc., you are recommended to use an impact crusher; if you need to crush materials with high hardness such as granite, basalt, tuff, etc., you are recommended to use cone crusher machine;
If you have higher requirements on the size of the finished product, it is recommended that you choose a counterattack crusher, which has a certain shaping effect on the stone;
If you are a novice in the industry, or a small and medium-sized stone factory, it is recommended that you choose impact crusher. The impact crusher has a simpler structure, more convenient maintenance, and relatively low price; if you are a large-scale stone factory, it is recommended that you use cones. Although the price of the cone crusher is relatively high, the equipment has a long life and avoids the trouble of frequent replacement of wearing parts. More importantly, the cone crusher has a high production capacity and is the best second-level crusher for large and medium-sized stone plants choice.
In summary, when choosing the secondary crushing equipment of the stone production line, in addition to considering the feed ability and equipment price, the selection should also be combined with the scale of the primary crushing equipment, and the front and rear production capacities must be matched.