Lin mineral processing plant, foundry sand, building sand, sand washing, drying sand, Subhead sand, sand, Tianjin, Shandong, sand, natural stone in its natural state, the force of the water for a long time Repeated collision, friction, and its composition is more complex, has a certain surface smoothness, non-metallic impurity content and more ore. River sand particles sleek, relatively clean, wide source; no taste of river sand, sea sand salt taste; sand While the contribution of the construction industry has Zhuo, but often mixed with sand and shells and salt, most sea sand containing excessive chloride, which can corrode steel reinforced concrete, resulting in destruction of the building structure, to a certain extent, will shorten the life of the building safe. The use of sand from the skeleton or fill in concrete loose granular material. Sand specifications; sand is now divided into: building sand, sand washing, drying sand, natural sand, sand subhead, site with sand, sand and sand mortar 4-8 mesh, sand 8- 16 mesh, 10-20 mesh sand, sand 20-40 mesh, 40-70 mesh sand, sand 70-120 mesh