Raymond mill machine adopts advanced structure of similar products at home and abroad, and in the same industry Raymond Mill Based on improving design and updated into, its high efficiency of ball mill, low power consumption, covers an area of small, small investment. The winnowing air flow is in fan - mill shell cyclone wind machine circulating operation, so high-speed centrifugal pulverizer dust less, operation workshop clean, no pollution to the environment, product features, acicular material grinding, grinding process of temperature rise, suitable for heat sensitive materials crushing, not to be missed! The sandstone can be divided into three major categories: quartz sandstone, feldspar sandstone and debris sandstone. Sand and sandstone constitute the main reservoir oil, natural gas and groundwater reservoir. Sand and sand can be used as abrasive, glass, and building materials. Some of the occurrence of sand and sandstone is rich in gold, diamond, zircon etc. Sandstone is made of quartz grains, and the structure is stable. It is usually reddish brown or red, mainly containing silicon, calcium, clay and iron oxide. The sandstone is a sedimentary rock composed mainly of sand, cementation and sand grain content, which was greater than 50%. Most sandstones are made of quartz or feldspar. Quartz, feldspar and other clastic components accounted for more than 50% of the sedimentary clastic rocks. Sandstone is the source area of the rock weathering, erosion, transportation and accumulation in the basin formation. The rock is composed of two parts of clastic and interstitial material composition. In addition to quartz, feldspar, quartz and other minerals, heavy minerals, cuttings, etc.. Cements and fillings include clastic matrix of two components. Common cements have a silica and a carbonate cementation; the base composition mainly refers to a finer clay or silt that is deposited with the particles. The composition and structure of interstitial material reflect the geological environment and the physical and chemical conditions of sandstone formation.