Basalt main component is silica, aluminum oxide, iron oxide, calcium oxide and magnesium oxide. Common basalt is black, dark brown or dark green. Because of its dense texture, its specific gravity is heavier than granite, limestone, sandstone, shale. There is also light porous basalt, called "pumice."
Limestone crushing & processing
A typical laminated device configuration is one set jaw crusher for primary crushing and another set jaw crusher for secondary crushing or primary jaw crusher plus secondary cone crusher process configuration. If the customer has higher requirements on the final stone product type, you can then configure a impact crusher for integer broken, thus forming a three stage crushing process configuration. Three stages crushing will inevitably lead to a higher cost of investment projects, but for long-term operation of the stones factory, three stages crushing for the production costs are very substantial.