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      4. Home-->>news-->> Crushing Plant Affects Ore Processing Deeply

        In order to separate the minerals from the waste minerals, it is necessary to crush and grind the rock to unlock, or liberate, valuable minerals so that they are partially or fully exposed. This process of size reduction is called crushing. The crushing process will produce a range of particles with varying degrees of liberation .Any particles that exceed a target size required for physical separation or chemical extraction are returned to the crushing or the grinding circuit.
        The crushing process actually begins during the mining stage through the use explosives, excavators or scrapers for softer material. This is necessary in order to generate a material that is transportable by haul trucks or conveyors. Crushing in the mineral processing plant is carried out in a sequential manner using crushers and screens followed by grinding mills. The various types of crushing equipment including their general application are described in detail below.
        Within the crushing circuit, a primary crusher reduces material down to a size that can be conveyed and fed to the secondary crushing circuit. The two most common primary crushers used for coarse run-of-mine material are the jaw and gyratory crushers. These primary crushers break rock through compressive forces created by a hard moving surface forcing and squeezing the rocks towards a hard stationary surface.
        A Jaw Crusher reduces large rocks by dropping them into a flat “V” shaped space created between a fixed surface and a movable surface.  The opening at the bottom of the jaw plates is the crusher product size gap. The rocks remain in the jaws until it is small enough to pass through this adjustable gap at the bottom of the jaws.
        In a gyratory crusher, a round moving crushing surface is located within a round hard shell which serves as the stationary surface . The crushing action is created by the closing the gap between the hard crushing surface attached to the spindle and the concave liners (fixed) mounted on the main frame of the crusher. The gap is opened and closed by an eccentric drive on the bottom of the spindle that causes the central vertical spindle to gyrate.
        Secondary Crushers - Cone Crusher
        The most common type of secondary crusher is the cone crusher. A cone crusher is very similar to the gyratory but has a much shorter spindle with a larger diameter crushing surface relative to its the vertical dimension. The eccentric motion of the inner crushing cone is similar to that of the gyratory crusher.
        With its high quality products such as jaw crusher, impact crusher, cone crusher and sand maker, Zhengzhou YIFAN machinery Co. Ltd has ascended in the front rank of the world in the exporting of mining equipments.

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        欧美av

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