Manganese is widely distributed in nature, and almost all kinds of ores and silicate rocks contain manganese. The most common manganese ore is anhydrous and water-containing manganese oxide and manganese carbonate.

Granite is one of the main constituent rocks of the earth’s crust. It is an igneous rock formed by the condensation of magma below the surface.

Basalt with its strong compressive resistance, strong corrosion resistance and good asphalt adhesion, is internationally recognized as the best material among the stones used in the construction of roads, railways, airports, etc

The processing of pebble is divided into three stages: coarse crushing by jaw crusher, secondary and third crushing by impact crusher or cone crusher, and sand shaping by sand making machine.