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|Lightwave 7.5||Default Scanline|
|3ds Max 7.0||Default Scanline|
|Maya 6.5||Default Scanline|
|Softimage 2010||Default Scanline|
|3D Studio 3.0|
|Electric Image 7.0|
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A rock crusher is a machine designed to take large rocks and reduce them to smaller rocks, gravel, or rock dust. Rock crushers produce aggregates and ready-to-process mining ores, as well as rock fill material for landscaping and erosion control. They can be used with virgin rock or other materials such as reclaimed concrete. Rock crushers can be mobile although usually very heavy machines or they can be fixed installations.
Crushing is the first step in converting shot rock or demolition rubble into usable products, by taking large rocks and breaking them into smaller pieces. Crushing is sometimes continued until only the sand-like 'fines' remain, and in mining applications it is usually followed by milling. At some operations, all the crushing is accomplished in one step, by a single crusher. At other operations, crushing is done in two or more steps, with a primary crusher that is followed by a secondary crusher, and sometimes a tertiary or even quaternary crusher. Each crusher is designed to work with a certain maximum size of raw material, and often delivers its output to a screening machine which sorts and directs the product for further processing.
In operation, the raw material of various sizes is usually delivered to the primary crusher's hopper by dump trucks, excavators or wheeled front-end loaders. A feeder device such as a conveyor or vibrating grid controls the rate at which this material enters the crusher, and often contains a preliminary screening device which allows smaller material to bypass the crusher itself, thus improving efficiency. Primary crushing reduces the large pieces to a size which can be handled by the downstream machinery.
Some crushers are mobile and can crush rocks as large as 16 inches, concrete and asphalt into material as it is driven over material on road surface, thus removing the method of hauling oversized material to a stationary crusher and back to road surface. Mobile crushers may save a large amount of time and money for the road construction crew and owners.
Asphalt debris from road repairing work