Main Process Line Equipment For Cement

 Crushers



Impact   

In crushing terminology, impact refers to the sharp, instantaneous collision of one moving object against another. Both objects may be moving, such as a baseball bat connecting with a fast ball, or one object may be motionless, such as a rock being struck by hammer blows.

There are two variations of impact: gravity impact and dynamic impact. Coal dropped onto a hard surface such as a steel plate is an example of gravity impact. Gravity impact is most often used when it is necessary to separate two materials which have relatively different friability. The more friable material is broken, while the less friable material remains unbroken. Separation can then be done by screening

Attrition

Attrition is a term applied to the reduction of materials by scrubbing it between two hard surfaces.

Shear

Shear consists of a trimming or cleaving action rather than the rubbing action associated with attrition.

Compression

As the name implies, crushing by compression is done between two surfaces, with the work being done by one or both surfaces. Jaw crushers using this method of compression are suitable for reducing extremely hard and abrasive rock. However, some jaw crushers employ attrition as well as compression and are not as suitable for abrasive rock since the rubbing action accentuates the wear on crushing surfaces

 Hammer Crushers

Hammer crushers are among the oldest, yet still the most widely used crusher designs. Although recent years have witnessed the introduction of new types of crushers, many are a refinement of the basic Hammer crushers design to serve more specialized purposes.

Reversible Hammer Crushers

The Reversible Hammer crushers are symmetrically designed crushers with a rotor that can be run clockwise or counter-clockwise. Reversal of the rotor permits the operator to utilize the opposite face of the hammer daily for maximum hammer sharpness. This ability to reverse totally eliminates the requirement of manual hammer reversal.

Jaw Crushers

 For crushing of hard, abrasive materials, Jaw Crushers are often preferred, since this type of machine will crush virtually any mineral.

 Jaw Crushers differ substantially from other types of crushers. There is no rotary motion in the crushing cycle, and all crushing is done by compression of the feed material between two massive jaws, which in effect are a type of breaker plate. Jaw plates can be either smooth or corrugated. 

Clinker Crushers

The Clinker Crusher is used for handling of bottom ash, though it can readily be configured to handle other materials.

It is now widely employed as a direct replacement for the most common makes and sizes of  clinker grinders. Its efficient design improves maintainability and increases component life, thereby reducing both operation and maintenance costs. 

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Technology of crushing

Crusher handbook pdf

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