There are numerous stone and mineral resources all over the world. Major rock types processed by the crushed stone industry include limestone, granite, dolomite, traprock, sandstone, quartz, and quartzite. Minor types include calcareous marl, marble, shell, and slate. Major mineral types processed by the pulverized minerals industry, a subset of the crushed stone processing industry, include calcium carbonate, talc, and barite. Industry classifications vary considerably and, in many cases, do not reflect actual geological definitions.
Stone Crushing Plant
Stone crushing is generally processed in three stages: primary crushing, secondary crushing and tertiary crushing. The feeder or screens separate large blocks from finer rocks that do not require primary crushing, thus reducing the load to the primary crusher. Jaw crusher, impact crusher, or gyratory crushers are usually used for initial reduction. The crusher product, normally 7.5 to 30 cm in diameter.
The stone that is too large to pass through the top deck of the scalping screen is processed in the secondary crusher. Cone crushers are commonly used for secondary crushing (although impact crushers are sometimes used), whic h typically reduces material to about 2.5 to 10 cm.
Tertiary crushing is usually performed using cone crushers or other types of impactor crushers. Oversize material from the top deck of the sizing screen is fed to the tertiary crusher. The tertiary crusher output, which is typically about 0.50 to 2.5 cm, is returned to the sizing screen.
Used Stone Crusher Machine
There are many small scale quarry and mines, they can't afford complete new large stone crushing machine. According to this problem, SBM provides complete series of used mobile crusher plant for sale, including used jaw crusher, used impact crusher, used cone crusher, used portable stone crushing machine etc. These used equipment is widely applied for contract crushers, in-pit and mining applications and recycle crushing sites.
The used stone crusher machines for sale are in good condition, and feature low price, high production capacity, big crushing ratio, low energy consumption, easy operation and maintenance. Our portable crushing plant are greatly welcomed worldwide. If you are interested, please feel free to contact us for more information.