Jaw crusher crushing step

Jaw crusher crushing step

Rolling is composed of two oppositely rotating grinding rolls. One is fixed root and the other is active. Accept the pressing force of the hydraulic transmission system. The well can be horizontally moved in the inner cavity of the rack. The grinding roller is driven by two motors separately, and the material is fed by the feeding device at the upper part of the rack. It is brought into the pulverizing chamber formed between the two rolls under the explosion of the rotating grinding roller, and is subjected to strong pressing action. As the material sinks. The gap between the material beds is getting smaller and smaller, and the strength of the extrusion is getting larger and larger until the narrowest point of the grinding roller. The intensity of the force reaches the maximum. The pulverized material is extruded into the shape of the cake and discharged. During the entire pulverization process, the material is enclosed in a small space, and the squeezing force forces the materials to interact with each other. Until it breaks and crushes. Historically, the extruded material has a high content of fine powder. Moreover, there are a lot of microcracks on the material particles. Its easy-wearing ability can be improved, which is very beneficial for the next step of grinding. The pressing force of the movable grinding roller is fixed by the material science bed. There is no ineffective collision and friction like a ball mill. Most of the energy is used for material crushing. Therefore, the energy utilization rate is very high. This is the main reason for the energy saving and high yield of this equipment. The pulverization of the roller press is mainly determined by the pressure between the particles of the material, and not entirely determined by the gap between the two rolls. Its working characteristics are full material, high pressure, slow speed, comminution of the bed, and the main difference with the roller crusher is that the material of the Jaw Crusher in the crushing chamber can be full, can not be full, the spring pressure is low, the roller The speed is faster, and the single particle is mainly broken. The basic premise of the roller press for crushing and squeezing the material is that the feeding device must maintain a certain level of material level (supersaturated feeding). In order to ensure continuous filling of the material between the two rolls: it is ten times higher than the crushing force of the roller crusher, generally 50 to 300 MPa. The roller crusher has a spring pressure of less than 5 MPa. The pulverization of the roller press depends mainly on the compactness of the bureaucracy, under the condition that the gap between the material particles is almost close to zero. The interaction between the particles and the transfer of the pressing force can be carried out, and the coarse and fine particles can be re-arranged dynamically. The pulverization process is roughly divided into three stages. (1) Under the joint action of gravity and the tension of the grinding roller, the pulverizing chamber with the space gradually decreasing starts to be subjected to a small pressing action, the volume of the material layer is reduced, and the particle phase is very close. Secret. The rotation of the sacral roller. Forced material drop, the density of the bed increases, the stress intensity increases, the particles gradually change from surface contact to surface contact, and some particles break along the cleavage surface. This crushing is the same as the roller crusher. (2) Material bed crushing stage When the dense material bed continues to move to the minimum gap of the two rolls, the degree of compaction is further increased. The stress intensity increases sharply and the fine particles are rearranged under the action of high pressure. Take up the gap between the particles. This causes the voids between the particles to tend to zero. Under the action of high stress, the material begins to transfer stress. There is a strong interaction between the particles. When the stress rises to the limit of material damage, many particles will produce a very high probability of pulverization or emblem cracking. (3) The rate of particle pulverization during the stage of cake discharge Increased, the fine particles that have been crushed must be seen under the action of high stress, and the needles are moved to the gaps, and the respective positions are re-arranged. The larger particles are tightly surrounded by the fine particles; at the minimum of the gap between the two rolls, the compactness of the material bed is reached. highest. So the "area" of the human area was created. Forming a continuous "cake" & rdquo; discharge smashing cavity. The unloaded cake is broken into powder. Even smash it with your hands. The whole process of pulverization is “squeezing & mdash; crushing & mdash; cakes”. These three stages are dynamic processes. There are no strict boundaries and certain interactivity. In Feiguo, the pressure Yao machine has been applied to cement [clinker), raw materials, minerals. Coal, ore and other grinding processes. From early pre-crushing to raw semi-finished and final grinding, and in combination with ball mill cement grinding.