quality plan of aggregates crusher production

Crushing process includes primary crushing, secondary crushing and tertiary crushing. In this process, log washer, heavy media separator, and attrition mill are used to ensure quality of aggregates.

A primary crusherreceives the stone directly from a quarry after blasting, and produces the first reduction in size. The output of the primary crusher is fed to a secondary crusher, which further reduces the stone size. Some of the stone may pass through four or more crushers before it is reduced to the desired size.

Gyratory crushers provide continuous crushing action and are used for both primary and secondary crushing of hard, tough, abrasive rock. Cone crushers are used as secondary or tertiary crushers. Cone crushers are capable of producing large quantities of uniformly fine crushed stone.

For any given setting for jaw or roll crusher approximately 15% of the total amount passing through the crusher will be larger than the setting. If the opening of the screen which receives the output from such crusher are the same size as the crusher setting, 15% of the output will not pass through the screen.

Crushed aggregate is produced by crushing quarry rock, boulders, cobbles, or large-size gravel. Recycled concrete is a viable source of aggregate and has been satisfactorily used in granular sub-bases, soil-cement, and in new concrete. f Aggregate production process includes from extraction through to processing.

Crushers are also classified by their method of mechanically transmitted fracturing energy to the rock. Jaw, gyratory, and roll crushers work by applying compressive force. Impact crushers such as single rotor and hammer mill apply high-speed impact force to accomplish fracturing Table 2 (T 14-2, Text) lists the major types of crushers.