Five Types Of Stone Crushers

By Author: Qiao JingLiang
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Stone crushers are used extensively in mining applications. The type of crusher used will depend on a variety of factors including the type of mine in terms of what ore is being mined, the size of the required finished product to be produced by the mine, the industrial applications of the mine ore, and the type of mine in terms of how the ore is mined. Iron ore that is to be used for high-quality applications will need to be refined more than iron ore that is to be blended with other metals, for example. In some coal mines, the finished product resembles small boulders whereas other mines have outputs that are fist-sized or smaller.

Categories of Stone Crushers in the Mining Process
In the mining process, there will typically be more than one type of crusher. This is because the ore does not come out of the ground in a uniform size and quality. The size of the ore will also depend largely on how the rock is mined from the ground. The use of explosives and drilling produces ore that varies greatly in size. This is where different types of crushers come into play. Initially, when the ore is brought to the processing ...
... plant, it will enter a primary crusher. This crusher will be the largest on-site and have the greatest payload as it has to crush large non-uniform sections of stone. From the primary crusher, the ore will go through a washing and separating process and enter a secondary and tertiary crusher. The more crushers in the work process, the smaller and more refined the ore becomes. The order of the process is usually defined by the industrial applications of the ore being mined.

Jaw Crusher
A jaw crusher is one of the simplest forms of stone crushers. In it, the mined ore is broken down by the movement of swinging plates. One plate is generally fixed and a driving belt will periodically swing the eccentric plate towards the fixed plate so that a crushing motion is achieved. The eccentric plate is then lifted again by a pulling rod and spring. Jaw crushers are often primary crushers, able to crush extremely hard rock. They vary in size according to the required application and can be part of a mobile crushing unit or installed as a stationary machine in a process plant. Another benefit is that they can be used underground as well as on the surface and are considered one of the more reliable crushing machines because of their simple design structure.

Cone Crusher
A cone crusher has some of the widest applications in the mining process. By definition, a cone crusher is a machine that crushes ore between a gyrating cone and an inverted truncate cone which is usually referred to as a bowl. A cone crusher is also sometimes referred to as a gyrating crusher. It works on the idea that a central bushing is driven by a motor by means of v-belts, pionions, shafts, pulleys and gears. As the mantle rotates with the eccentric bushing, the motion has the effect of moving near and far from the outer cone. This motion is what crushes the rock. A cone crusher can be a primary, secondary or tertiary crusher, depending on the mining applications. Compared to a jaw crusher, a primary cone crusher generally has a higher capacity and is therefore viewed as more economical. Most applications for cone crushers are secondary, tertiary and fine mineral refining. Cone crushers tend to be more compact and can be installed as stationary components or integrated with mobile crushers.

Hammer or Impact Crusher
A hammer crusher is generally used as a secondary, tertiary or fine material processor. It is also known as an impact crusher. The machine has a rotor with small hammers that rotates at high speed, driven by a belt. As the ore is poured into the machine, the hammers crush the larger rocks until they are the right output size. The ore is then discharged from the machine through an outlet. Any rocks that are already the correct size will simply fall through to the outlet and rocks that are not yet small enough will be recycled through the process until the hammers process them to the right output size.

Mobile Crusher
A mobile crusher is simply a smaller jaw or cone crusher that is constructed as a mobile unit. Used widely for exploratory work, mobile crushers may have up to four crushers as part of the work process and be able to output a refined finished product. Because of their mobility, they have a wider range of applications and can be used on the surface as well as underground.
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