Stone crushing is a global phenomenon, and has been the cause of concern everywhere in the world, including the advanced countries.Dust from quarry sites is a major source of air pollution, although the severity will depend on factors like the local microclimate conditions, the concentration of dust particles in the ambient air, the size of the dust particles and their chemistry, for example limestone quarries produce highly alkaline and reactive dusts.The stone crusher dust is not only a nuisance (in terms of deposition on surfaces) and possible effects on health, in particular for those with respiratory problems but dust can also have physical effects on the surrounding plants, such as blocking and damaging their internal structures and abrasion of leaves and cuticles, as well as chemical effects which may affect long-term survival (guach, 2001).
The pitman is the main moving part in a jaw crusher.It forms the moving side of the jaw, while the stationary or fixed jaw forms the other.It achieves its movement through the eccentric machining of the flywheel shaft.Total back and forth movement of the top of the pitman is only about 1 1/2".This gives tremendous force to each stroke.
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Jaw crusher reduces large size rocks or ore by compressing, a fixed jaw, mounted in a v alignment is the stationary breaking surface, while the moveable jaw plate exerts force on the rock by compressing it against the fixed jaw plate.The space at bottom of the v, aligned jaw plate, is the output size gap, or the maximum size of the crushed product.
How often a super maintenance should be done depends on the daily performance and inspection of the fixed crusher, which says there is not a certain frequency on deploying a thorough maintenance.
The roll crusher(roller crusher) incorporates one stationary roll and one moveable roll.The movable roll provides relief by moving away form the stationary roll when uncrushable material is encountered and immediately resets to the original position.Roll diameters range from 18" to 76" and roll widths up to 120".
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