It is become the conjunct developing direction in international society to develop low carbon economy with scientific supporting. And stone mine is usually produced by high carbon company, so it’s a great question to adopt low carbon economy development, which require immediately solve.

Nowadays, our country construction, speed up infrastructure construction, to the airport, railway, highway. Small to rural road construction cannot leave the sand aggregate. Sand and gravel aggregate demand increased rapidly, natural sand and gravel aggregate is limited, and mining, transportation, etc, many places are not convenient, and system of artificial sand on sand making machine…