Techniques used for limestone extraction vary with the properites and location of the deposit. Processing operations may include crushing, screening, size classification, material handling and storage operations.

   Crushing is the crucial stage in limestone processing operation. The feeder or screens separate large boulders from finer rocks that do not require primary crushing, thus reducing the load to the primary crusher.But large boulders need jaw crusher as the primary crushier . Impact crusher and cone crushers are usually used for secondary crushing.

    The crusher product, normally 7.5 to 30cm in diameter, and the undersize material are discharged onto a belt conveyor and conveyed as coarse aggregates. According to end products applications, the limestone may be crushed in secondary and tertiary crushing process for further size reduction.

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