How to control the particle size of sand and gravel in cone crusher

Cone crusher is a commonly used crushing equipment in crushing sand and gravel aggregate. The shape of the crushed sand and gravel aggregate is the main indicator for measuring the cone crusher. In the field of sand and gravel crushing, the control of the shape of the crushed sand and gravel is very necessary. How does the cone crusher control the shape of the crushed sand and gravel?
 

In the construction field, the increase of needle-like particles in concrete aggregates will lead to a decrease in the overall compressive strength of the building and increase the consumption of cement in the construction process; similarly, in asphalt mixtures, needle-like particles are The increase will also lead to a decrease in the overall density and compressive and tensile strength of the mixture. It can be seen that the size of the needle-like particle shape plays an important role in the quality of the crushed product.

We will explain the control of the crushing sand and stone needle rate of the cone crusher: when the material passes through the crushing cavity of the cone crusher, the needle rate will increase rapidly with the occurrence of extrusion and crushing failures, and after reaching a certain level will gradually fall back. Before the material enters the crusher, after the screening or particle size separation process, the particle size will become more uniform; after entering the crushing cavity, the material will be squeezed and crushed, and needle-like particles will begin to appear. As more and more material particles are crushed by extrusion, the needle-shaped particles increase sharply; when the extrusion and crushing failure further increases, some material particles, including needle-shaped particles, will be squeezed twice or more pressure effect.

In the second half of the crushing process, the needle rate of the material in the crushing cavity is constantly decreasing. During the working process of the cone crusher, the frequency of extrusion and crushing is increasing, which is beneficial to reduce the needle sheet in the crushed product. particles. Therefore, the increase of the spindle speed can improve the granular quality of the crushed products to a certain extent.