Currently, artificial sand has gradually occupy the market has become a major source of sand and gravel, but illegal mining behavior persists in many places. Today the ecological situation is grim, the full protection of the ecological environment can not be delayed. We must take effective measures to prevent illegal excavation of sand and gravel…

In recent years, due to the shortage of natural sand and the development of infrastructure construction, artificial sand is faced with good development opportunities, and artificial sand production requires a lot of sand making machine. Along with the increase of market demand, the sandstone is an important material of building industry, demand is quite big,…