What are the crushing methods, crusher pulverizer selection,
types of crushing equipment
What are the crushing methods, crushing machinery, crushing machinery, crushing equipment types of knowledge, for many customers and friends, the main thing is to be able to correctly recognize the type and model of the crusher, so as to configure the equipment to make a reasonable choice. If this is not understood, buy back the equipment found not well adapted to the crushing of materials, then, and then replace the very troublesome. Therefore, do not underestimate the understanding of the type of crushing machinery. In the previous section of the text we have a brief introduction to the type of crusher design mechanics, in fact, the crusher in the design, first of all, we must know the theory of crushing mechanics, from the theoretical combined with the actual design, so that there can be more practical and useful products. It is also possible to combine the advantages of various mechanics to create more useful equipment. Commonly used crusher in this page are introduced and parameter labeling, you can refer to.
Crushing uses external forces, i.e., consumes a certain amount of energy. From a point of view, crushing is divided into mechanical energy crushing, and non-mechanical energy crushing. Mechanical energy crushing is the use of mechanical methods to produce crushing force, applied to the material to make it broken, which is currently the application of more effective methods. Non-mechanical energy crushing is the application of electrical energy, thermal energy and other non-mechanical energy for crushing. Such as hydroelectric effect crushing, thermal crushing, decompression crushing and so on. Mechanical energy crushing has extrusion, splitting, fracture, shear, grinding, impact or blow and other ways of action.
Extrusion Crushing: The working face of the crushing equipment exerts pressure on the material sandwiched between them, and when the material is crushed when the compressive stress reaches the limit of its compressive strength, the extrusion mill, jaw crusher and so on belong to this kind of equipment. Because of the slow and uniform action of the squeezing force, the crushing process is more uniform. This method is generally used for coarse crushing.
Splitting crushing: crushing the prongs of the working surface wedge into the material and make the
internal tensile stress, when its value exceeds the limit of tensile strength of the material, the material
splits, and in the sharp prongs of the contact point with the material locally generated powder.
Bending fracture crushing: sandwiched between the working surface of the material, such as by the
concentrated force of the simple beam or multi-supported beam, the material is mainly subject to
bending stress and this section, but in contact with the working surface by the splitting effect.
Impact Crushing: Impact crushing includes the impact of high-speed movement of the crushing body
on the crushed material and high-speed movement of the material to the fixed wall of the impact as
well as the movement of the material mutual impact. Impact crushing is mainly carried out by dynamic
load, the effect is better than static load. When the crusher works, the material is subjected to large
enough instantaneous impact, if the dynamic load exceeds the fatigue limit that is broken. Repeatedly
impacting the material can reduce the stress required for crushing. Therefore, high-frequency impact
crusher has low power consumption, high crushing ratio and less over-crushing.
Grinding and crushing: Grinding, including grinding media on the material and the mutual friction
between the materials. There is relative movement between the working surface and the material
surface or between the material surfaces, and the material is subjected to shear deformation caused by
grinding, and when the material is subjected to shear stress to reach the limit of shear strength, it will
be crushed. Vibrating mill, stirring mill and ball mill fine grinding are the main way.
Extrusion and shear crushing: Roller crusher, Raymond mill and all kinds of vertical mill usually adopt
extrusion-shear crushing method. Crushing method is mainly the above types, commonly used for
extrusion crushing such as jaw crusher, impact crushing such as impact crusher, crushing machinery,
crushing machinery, crushing equipment types of the introduction of the temporary to here, I hope to
help you.
