Lightweight ceramsite is ceramic particles. Because with lightweight ceramsite, also known as lightweight ceramsite sand. Of lightweight ceramsite with clay or fly ash, biological sludge as main raw materials, through high temperature roasting, puffing, lightweight ceramsite as a kind of light aggregate, small density, high strength, bibulous rate is large, heat preservation, heat insulation, fireproof, seismic and other characteristics, widely used, can replace ordinary sand mixing light aggregate concrete, used for water treatment filter material, adsorbent, permeable pavement materials, can also be used as a soilless culture medium, in agriculture, garden and bridge panel, hollow block building materials such as raw materials

　　Haydite lightweight refractory bricks with high alumina cement concrete or alumina cement - 65 as a binder, and shale ceramsite, lytag or aluminum ceramsite as aggregate, by the methods of vibration or vibration pressure molding made by lightweight refractory products. Existing national standards, block according to the material divided into shale quality, quality of fly ash and aluminum ceramsite three categories, the symbol of GE, GF and GL respectively. Block of the technical requirements are as follows. (1) binder GE, GF block with symbols are not less than 600 alumina cement, the performance must be in accordance with GB 201-201 "high alumina cement" regulation, GL block USES the symbols are not less than 700-65, high alumina cement its performance must be in accordance with JC 236-81 "high alumina cement - 65" regulation.

　　(2) the aggregate increase aluminium ceramsite refractoriness is not less than 1600 ℃. Shale ceramsite shall not be less than 18%, content of Al2O3 in Fe2O3 content shall not be higher than 8%, bibulous rate is not greater than 10%. Lytag shall not be less than 30%, content of Al2O3 in Fe2O3 content shall not be higher than 7%, bibulous rate is not greater than 22%.