Comparison and Analysis of Common Jaw Crusher Types

Impact Crusher

Impact crusher use scope: It can handle all kinds of coarse, medium and fine materials (granite, limestone, concrete, etc.) with a side length of no more than 500mm and a compressive strength of no more than 350MPa. It is widely used in hydropower, highways, and artificial gravel, crushing and other industries.
Impact crusher performance characteristics: Unique structure, no key connection, high chromium plate hammer, a unique counterattack liner; hard rock crushing, high efficiency and energy saving; product shape is a cube, adjustable size of the discharge size, simplify the crushing process.
Impact crusher working principle: During work, driven by the motor, the rotor rotates at high speed. After the material enters, it collides with the plate hammer on the rotor and then it is broken. Then it is counterattacked to the liner and broken again, and finally discharged from the discharge port.
The most used in the production of a concentrator or a gravel plant is a jaw crusher. Compared with other crushers, this machine has the advantages of low cost and high efficiency.
Jaw crusher

Jaw crusher wear requirements are very high, the general choice of materials for high wear-resistance manganese steel liner. When the machine is working, it has two jaw plates inside the crushing chamber (manganese steel), and a jaw plate is fixed and is called (fixed jaw). It is slightly inclined from the upper end to the outer edge and fixed in the crusher cavity. On the front wall of the body, another common name for the seesaw is our tongue-in-the-wall motion. It is also called the tongue. The position is inclined, and it forms a trapezoidal crushing chamber (work chamber) with a fixed jaw plate.
The movable jaws are reciprocated against the fixed jaws and crushed and rubbed, then separated and then approached. When the two seesaws are separated, the material immediately enters the crushing chamber. At this time, the already finished product is discharged from the bottom of the crusher; when the two sampan plates come together, the material entering the crushing chamber is subject to two defects. The pressing force of the plate’s extrusion belt kneads the material, thereby bending and crushing the material and breaking the material. The entire process of breaking the material is achieved.

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Comparison and Analysis of Common Jaw Crusher Types

At present, the domestic mainstream Jaw Crusher is the PE series Jaw Crusher (Jaw Crusher for short), and the C-series smashing machines with advanced rake angle are popular in European and American countries. The following is a corresponding comparison and analysis of the PE series smasher and the C series smasher.
Smashing is the originator of the crusher and is the most widely used crusher type to date. The smashing and breaking machine is almost necessary for the material crushing process with high hardness and high abrasiveness. The PE series smasher is the mainstream of domestic applications. The new C series smasher is a product that has been developed using foreign technology. Compared with the PE series smashing machines, the weight, power consumption and size of the C series smashing machines are greatly reduced in the comparison of the same production capacity models. PE series smashing machines are economical products with mature technology and stable and reliable performance. They are very practical products without special requirements. C series smashing machines cost a lot, but the equipment size is greatly reduced, the energy consumption is low, and the hydraulic adjustment system is convenient and quick. In the case of strict installation space and energy consumption requirements, the C series smashing machines can play a stronger role. applicability. Fine crusher has limited crushing capacity (25mm minimum discharge opening and 30mm crushing size), but it is still ideal as a medium crusher. However, because of its structural limitations, the stand-alone production capacity of fine-breaking machines is not high. Therefore, the fine smasher can only be used in small-capacity processes. When the crushing capacity is high, a cone crusher must be used to complete the large-capacity crushing task.
Breaking machines are divided into welded and cast steel types. Traditionally, cast steel frames are considered to be stronger and more durable. However, at the same time, the cast steel frame also limits the development of the cast steel frame due to the irreparable nature of casting casting defects and the high difficulty in the detection of casting defects. In practical applications, the welding rack basically becomes the mainstream, and the life and stability of the welding rack are very reliable. Welding racks have also become the mainstream of multinational companies. Therefore, the editors believe that the traditional view that cast steel racks are superior to welded racks no longer exists.
Two-stage smashing and crushing machines perform step-by-step crushing. Under normal circumstances, coarse smasher smasher and fine smasher smasher should be used, and two-stage rough crusher should not be used to perform smashing. For example: the editor had contact with a river pebble production line yard, the first broken using PE600 * 900, two broken using PE400 * 600 process configuration, which is an extremely unreasonable match. For high-hardness, high-abrasive materials (granite, diabase, river pebbles, basalt, iron ore), two-stage boring machines are used to complete the main crushing task, and then other equipment is used to complete the crushing task. When the productivity is large, the fine smasher needs to be replaced by a cone crusher. The capacity of smashing the machine is not only related to the device itself, but also has a huge correlation with the feeding method. Many crushing lines (especially those below 100 t/h) do not use feeding equipment, but use chute semi-artificial feeding. Without the use of feeding equipment, the smashing machine has a high idling rate, causing a serious waste of crusher capacity. Therefore, we recommend that users should configure the corresponding feeding equipment for the crushing line as much as possible. Fine smashing machines should strictly prohibit the use of chute feeding methods, especially for small smashing machines where the discharge port is set to a small size. Chute feeding can easily cause crusher’s “slacking” and cause frequent fracture of the toggle plate. (The bracket is the safety protection device for the smashing machine). A calcium carbide crushing plant adopts a chute to directly feed the PE250*1200 smasher, often causing smashing of the smashing machine. The brackets frequently break. After the suspension feeder was added according to the editor’s suggestion, the fracture of the elbow plate disappeared. The selection of smashing machines should follow this principle: For high hardness, high abrasive materials, try to select the model with the smallest opening size of the smashing machine; for low hardness, low abrasive materials, try to follow the smashing machine. The maximum size of the opening capacity of the selected models.

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