Pebble and Gravel Crushing Equipment

Stone is one of the most accessible natural resources of the earth and one of the fundamental building blocks of our society. It has been used from the earliest times of our civilization for a variety of uses that have increased in number and complexity with time and technological progress.

Today, in its crushed form, stone is a major basic raw material for construction, agriculture, and other industries that use complex chemical and metallurgical processes. Despite the relatively low unit value of its basic products, the crushed stone industry is a major contributor to and an indicator of the economic wellbeing of the Nation.

Pebble and Gravel Crushing Production Line

Techniques used for extraction vary with the nature and location of the pebll and gravel deposit. Processing operations may include crushing, screening, size classification, material handling and storage operations. The feeder or screens separate large boulders from finer rocks that do not require primary crushing, thus reducing the load to the primary crusher.

The stone that is too large to pass through the top deck of the scalping screen is processed in the secondary crusher. Oversize material from the top deck of the sizing screen is fed to the tertiary crusher for further size reduction. The tertiary crusher output, which is typically about 0.50 to 2.5 centimeters (3/16th to 1 inch), is returned to the sizing screen.

Pebble and Gravel Crushing Equipment

The choice of crusher depends on the type and amount of material to be crushed. Gyratory and jaw crushers represent the bulk of primary crushers used at mining operations today, although some operations use roll impact crushers, low-speed roll sizers and feeder breakers. Cone crushers remain the most popular for fine crushing applications, although some mines use vertical impact crushers for tertiary and quaternary crushing.

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