As the materials passes towards the outlet, it is crushed between the stationary and moving jaws. Because the space between the two jaws becomes narrower towards the discharge outlet, the material size is progressively reduced.
The gap between the jaws at the discharge outlet dictates the material output size. A typical jaw crusher will have a crushing ratio of between to i.
Home Corporate Plans 3d models Encyclopedia about Services contact login. Article Video Courses Courses Introduction Comminution is the process by which mined ore is reduced in size to make for easier processing.
Jaw Crusher Some of the earliest versions of crushers were large stones used by humans to repeatedly hammer rocks placed upon an anvil a hard stationary surface ; the products made from this hammering action were transported by pack animals or humans in sacks. Mobile Jaw Crusher The demand for mined minerals and other mined by-products has not reduced over the past years. Purpose of Crushers A crusher is a machine designed to reduce the size of large rocks to smaller rocks , gravel , sand, or rock dust ; this is essential for efficient transport of the product via conveyors etc.
Crusher Types There are three common crushers used at mining and processing plants, these designs are: Gyratory Crusher Jaw Crusher Cone Crusher Crusher Types jaw, cone, gyratory Typically, the initial crushing stage is completed using either gyratory crushers or jaw crushers.
There are three main jaw crusher types: Blake crusher — the swing jaw is fixed at the lower position. Dodge crusher — the swing jaw is fixed at the upper position. Universal crusher — the swing jaw is fixed at an intermediate position. How Jaw Crushers Are Sized Jaw crushers are sized based upon the dimensions of the top feed inlet gape or the dimensions of the jaws. F is the maximum gape opening on a Jaw Crusher. F80 is the feed size to the Jaw Crusher, calculated by taking 80 times the gape opening divided by P80 is the percent passing the closed side setting in tph.
A best practice, if possible, is to blend the material arriving from the source. This will ensure a constant and well-graded feed to the crushing chamber. In turn, this will produce a steady rate of tph and promote inter-particle crushing that helps break any flat or elongated material.
It also aids in equal work hardening the manganese jaw dies and prolonging the life of the jaw dies. I see McLanahan offers a shim and hydraulic adjustment on their Jaw Crushers. Shim has been around for years, why should I consider hydraulic adjustment? Both the shim and hydraulic styles of adjustment perform the same task. Below is a list of items to help decide which is right for you.
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Jaw Crushers Jaw Crushers are used to reduce the size of many different types of materials in many applications. As the moving jaw moves away from the fixed jaw, the crushed material is discharged from the crusher at the bottom, with the size of the ejected material determined by the gap between the jaws. Jaw crushers are generally defined by their opening size. Feed Chute 2. Drive Flywheel 3. V-belts 4. Electric motor 5. Motor Stand 6. Settings and Damping Group 7. Hydraulic Cylinder 8.
Toggle Plate 9. Swing Jaw Discharge Fixed Jaw. Minimum and maximum movability of the lower end of the jaw. The ratio of the gape width to the near side jaw opening. One of the most important parameters is the angle between the two jaws, which is referred to as the nip angle. The nip angle is the angle at which the material, that passes through the crusher inlet to be crushed between the jaws can be gripped by the jaws without slipping.
This angle depends on the size, hardness and frangibility of the material. More compact than double toggle designs, the single toggle movement jaw crusher was at one time unable to accept such large feed sizes, though it can typically run faster.
Technological innovations solved the feed size issue, and now these machines are quite popular for how quickly they work. They do experience a bit more wear and tear than the double toggle style crushers, however. Of course, wear parts are widely available and economical, so this fact has not prevented the single toggle design from catching on. As we touched on above, different jaw crusher designs will operate slightly differently, but how they work is similar across the board.
All jaw crushers reduce large sized rocks, ore, or other material by a compression action. The rock remains in the jaws until it is small enough to pass through the gap. Cone crushers and jaw crushers both work by compression, reducing materials by squeezing them until they break apart.
The benefit that cone crushers offer over jaw crushers is their ability to output a more cubical product similar to impact crushers.
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