A stone crusher is a type of pulverizer that is used to compress or break apart a variety of large stone, which refers to any kind of hard, solid, nonmetallic mineral, for either disposal or recycling applications. Ranging from very hard, mid-hard and soft minerals, stone can include: slag, limestone, quartz, granite, iron ore, sandstone, copper ore, marble, cement and more. Since stone crushers can be used on such a wide range of materials, they can be utilized in a variety of applications in industries such as: mining, for the crushing of mined and quarried stone; metallurgy, for the crushing of large stone into smaller stone that can be used in the process of working metal into parts and components; chemistry, to crush stone that can be used to process a variety of chemicals; construction, for the crushing of stone rubble that was previously used as building materials; and demolition, to crush debris left behind by the demolition of buildings, roadways, bridges, canals and various other structures. Additional industries that utilize stone crushers include transportation, energy, petrochemical, industrial manufacturing and smelting. http://www.crushermills.com/ Stone crushers typically feature a large crushing rate and high yield, and while they may be used as primary crushers, they are also often used as secondary or tertiary crushers.