From horizontal shaft impactors to jaw crushers, Eagle Crusher manufactures some of the toughest and most powerful crushing equipment on the market, empowering producers to conquer any size crushing project.
On a crushing job, every machine and piece of crushing equipment works together to contribute to the success of production. However, it is necessary to recognize that certain components of equipment like portable plants should require extra care to achieve that An impact crusher, or impactor, is one of several types of crushing machines, including jaw crushers, hammermills, and cone crushers, that is manufactured for the purpose of processing raw materials, like concrete or asphalt, among many others, to reduce them in size.
Used in a wide variety of applications, including aggregate crushing, asphalt crushing, and concrete crushing, etc. The mechanical structure of an impact crusher is defined by its rotor, the primary instrument for breaking apart material. The rotor is set among mounted plates, anvils, or aprons, inside a heavy housing; these aprons or anvils serve to bear the impact of the materials being processed and further break them apart.
The distinguishing feature between these two styles is the physical orientation of the rotor within the impactor. The rotor of a horizontal shaft impactor is oriented horizontally and utilizes blow bars or hammers to strike flowing material with great force in order to break it.
Horizontal shaft impactors are useful as both primary or secondary crushers and are able to crush a wide range of materials, from soft rock to much harder materials. Home Products and Services Plants and capital equipment Crushers Impact crushers - high-quality impactors. Impact crushers For any stage of the crushing process.
Impact crushers are utilized in aggregates production, mining operations, as well as in recycling applications. Depending on the type of an impact crusher, they are known for either high reduction ratios or capabilities to produce precisely shaped, cubical end products.
Impact crushers can be used in all different stages of size reduction from primary crushing to the last step of the crushing process.
High performance High reduction ration. Good quality end products. Reduced plant operating costs Durable wear parts and mechanical components. Configured for your needs Crusher settings can be customized for any requirements.
Easy maintenance Faster service reduce downtime and increase production capacity. Sometimes several pieces of cast steel or steel plates are also used to form the rotor of the disc stacking type. This combined type of rotor is easy to manufacture and easy to get balanced. Smaller crushers are made of cast iron, or hollow rotors welded with steel plates, but they are less strong and sturdy. The wear degree and service life of the plate hammer is directly related to the material of the plate hammer, the hardness of the ore, the linear speed of the plate hammer rotor circumferential speed , the structure type of the plate hammer and other factors, of which the material of the plate hammer is the main factor in determining the degree of wear.
Plate hammer material is currently used with high manganese steel or high chrome alloy steel. The plate hammer is fixed on top of the rotor by A. Screw fixing. This fixing method, not only the screw exposed to the striking surface, very easy to damage, and the screw is subject to large shear, once the shear will cause serious accidents. Pressure plate fixing. Plate hammer from the side into the groove of the rotor, the ends by the pressure plate. But this way of fixing the plate hammer is not strong enough, the work of the plate hammer is easy to loosen, this is because the plate hammer manufacturing processing requirements are very high and high manganese steel and other alloy materials are not easy to process.
Wedge fixing. The use of wedge plate hammer fixed in the rotor way, work under the action of centrifugal force, this fixed way more and more solid, and reliable work, removal and replacement is more convenient. This is a better way of fixing the plate hammer at present, and almost all manufacturers are adopting this fixing method. The number of plate hammer is related to the diameter of the rotor specification.
Generally speaking, when the diameter of rotor specification is less than 1 meter, three plate hammers can be used; when the diameter is For processing harder ore, or larger crushing ratio, the number of plate hammer should be more.
The impact plate is mainly in the form of a bending or arc-shaped structure. The bent impact plate see Figure 1 is simple in structure, but does not guarantee the most efficient impact crushing of the ore. The arc-shaped impact plate see Figure 3 is more commonly used in the form of an involute, which is characterized by a high crushing efficiency as the ore is impacted in a vertical direction at all points of the impact plate.
This structure can mainly play a screening role, improve the production capacity of the crusher, less over-crushing phenomenon, and reduce power consumption. The square cross-sectional shaft hanging from the impact plate is connected to the connecting rod and compression spring mounted on both sides of the machine body.
Impact crushers are machines and equipment that use impact energy to crush ore. It can be seen that increasing amounts of fine material are produced with increasing energy input.
The same effect was previously demonstrated for an operating crusher in Fig. We can, therefore, conclude from this. This permits us to determine the efficiency of power utilization in crushers and to predict the product size distribution which will arise from operating crushers at different power rates. The Bond Work Index figures obtained by backcalculation from the pendulum data are compared with the Net Work Index values obtained from the plants in Fig.
This agreement is probably due to the fact that the use of comparable energy levels in both machines gives rise to similar reduction ratios and product size distributions. Because of this, the pendulum test provides a good estimate of the Net Work Index when this is required for current design procedures.
The pendulum product distribution is a breakage function and can be used in models of the process to predict crusher product distributions for different operating conditions. The result of this simulation is given in Fig.
The selection or classification function used in this simulation was determined by backcalculation. Work is presently underway to quantify this function. The writers are firmly of the opinion that results to date prove that the use of this pendulum device can give more energy-size reduction information in a form readily useable for crusher application.
The data can be generated in less time and from a much smaller sample than is required for pilot plant testing. Our present pendulum tester is a research tool and is currently being modified for use in commercial testing of minerals and rocks. More details of this device will be given at a later date. The various types of crushers in full scale mineral processing production include Hammermills, Impactors, Jaw Crushers , Gyratories, Single-roll crushers.
Impact Crusher Buy a small impact crusher Rock Particle Breakage in Impact Crushing Rapidly increasing operating costs for minerals beneficiating plants continue to be the biggest single problem in maximizing profitability from these operations. Test Procedures for the Characterization of Crusher Performance The Bond Impact Work Index method has been an industry standard for the determination of crusher power requirements but was originally developed to ensure, that sufficient power was connected to primary gyratory crushers.
This is somewhat coincidental, since the pendulum curve is the product of a single particle-single impact breakage event and the typical crusher product curve results from multiple particle-multiple impact breakage, but is probably due to two facts: the modes of breakage and the net power rates are similar for the two machines the action of the cone crusher is such that an individual feed particle is subjected to a limited number of breakage events In order to show that the pendulum product size distribution is sensitive to power rate, several tests have been run on the same feed material at different levels of pendulum input energy.
We can, therefore, conclude from this that net power rates will be the same in the pendulum and the crusher when the two distributions coincide as they do in Figs.
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