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In stone quarries or gravel pits, large material usually is reduced in size by either a jaw or a gyratory crusher. Although economical, they have the tendency to create thin, elongated particles. In some operations impact crushers are used for primary crushing, but they may have a slightly higher cost per ton. Impact crushers may upgrade poor-quality aggregate and increase separation, such as removal of rebar from concrete in recycling operations. Secondary and tertiary crushing, if necessary, are the final steps in reducing the material to a desired product size. Historically, cone and roll crushers were the most common choice crushers, but in recent years impact crushers are more widely used.
Aggregate production is a complex process. It involves many different stages such as excavation, stripping, drilling, blasting, primary crushing, secondary crushing, tertiary crushing, screening, beneficiation, sand making process etc. Processing will influence mineral quality and integrity, aggregate physical properties, and, in particular, gradation (size control).
Establishing a stable production process may reduce variability of the product. Aggregate is also used in the production of asphalt, and great quantities are needed to build roads, pipelines, airstrips, and building pads. Aggregates constitute 90 to 95 % volume of concrete and shape of aggregates influence many a properties of fresh and hardened concrete. SBM is a world famous aggregate production line manufacturer; we provide high performance aggregate processing equipment.
SBM is a global supplier of service and technology for mining and construction waste crusher machine. We aim for providing high advanced equipment and create more wealth for customers. As a professional aggregate production line manufacturer, we provide complete series of aggregate production equipment for sale includes construction waste crusher machine, impact crusher, cone crusher, mobile quarry crusher, sand making machine etc. If you are interested, please just contact us about your requirements, we analysis your needs and design a best quarrying solution for you. If you have any questions, please contact us.