Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey. On Earth, most basalt magmas have formed by decompression melting of the mantle.
Use of Basalt
Basalt is used in construction (e.g. as building blocks or in the groundwork), making cobblestones (from columnar basalt) and in making statues. Heating and extruding basalt yields stone wool, an excellent thermal insulator.

 
Basalt Crushing Plant
For the basalt crushing plant, we here recommend three production line:
Line 1: vibrating feeder +primary Jaw crusher +Impact crusher +vibrating screen +belt conveying system +control system
Line 2: vibrating feeder +primary Jaw crusher +fineness Jaw crusher +Impact crusher(optional)+vibrating screen +belt conveying system +control system
Line 3: vibrating feeder +primary Jaw crusher +Compound Cone crusher +Impact crusher(optional)+vibrating screen +belt conveying system +control system

In the above basalt crushing plant, vibrating feeder feeds the material into Jaw crusher, and then Jaw crusher crushes it primarily. After being crushed into reasonable size, the material will be reshaped and processed by Impact crusher. Impact crusher plays the role of tertiary crushing and shaping, and then vibrating screen sieves product.

In the above basalt crushing plant, the main difference is the secondary basalt crusher: using Impact crusher, or using fineness Jaw crusher, or Compound Cone crusher. For Jaw crusher and compound Cone crusher, the working principle is plate pressing, so the percentage of stones with flaky shape, internal cracks is high. For Impact crusher, it has the functions of crushing and shaping, can make very good cubic shape; the stone materials are mainly used for highway, water conservancy, airport, civil construction etc.