Lightweight aggregate production plant

Lightweight aggregate application
Lightweight aggregate is using clay or fly ash, biological sludge as main raw material, through high temperature baking, puffing to make ​​light weight ceramsite as a lightweight aggregate, which has low density, high strength, large water absorption, thermal insulation, insulation, fire resistance, anti-knock and other characteristics. It has been widely used, and in the preparation of lightweight aggregate concrete, it can replace ordinary sand and gravel, used as a water filter, absorbent, permeable pavement materials , can also be used for agriculture, nutrient medium of the soilless cultivation in the garden, and the bridge deck, hollow blocks and other building materials.
The appearance of the light ceramic is around. Its surface is a layer of a hard shell, and this layer of the shell is ceramic or enamel, with roles of watertight , air conservation , which gives the ceramsite high strength and adsorption capacity. Ceramic sand is mainly used to replace natural river sand or hill sand in preparation of lightweight aggregate concrete.
Lightweight Ceramsite Category
Ceramsite according to density , id divided into general density ceramisite, ultralight density ceramsite, special light density ceramsite three categories. General density ceramisite is the density greater than 500kg/m3 ceramsite. Its strength is generally relatively high, used for the structure of insulating concrete or high strength concrete. The ultra-light density ceramsite generally refers to 300 ~ 500kg/m3 ceramsite. The ceramsite generally is used for thermal insulation of concrete and its products. Special light density ceramsite is less than 300kg/m3 ceramsite. It has excellent thermal insulation properties, but poor strength. Generally used in the production of light weight thermal insulation concrete and its products.
Lightweight aggregate production process
It can be divided into two major categories of non-calcined and calcined process. The calcining type can be divided into two kinds of sintered and burning swelling. The former is mainly fly ash ceramsite. The ceramsite bulk density is too large after burn out. To produce lightweight, ultra-light ceramic, it generally adopts the latter, and its production process generally include: pretreatment of raw materials, ingredients, shape, burn-in, roasting, cooling, screening. In the roasting process, billets are soften under high temperature and has a certain viscosity so that generates flow deformation under external force. At the same time, the generated gases of billets and the formation of a certain internal pressure , make inflation of the softening material with a certain viscosity, and ultimately form the porous structure of ceramsite.
Lightweight aggregates production line equipment
Lightweight aggregates production equipment in China is the industrial rotary kiln. Cylindrical kiln level is about 3 ° inclination placed on the idler pulley. The material , entered from the high end of the kiln , do a rotary motion, the materials from height (kiln inlet) rolled to a lower (kiln head), at the same time in the kiln hood, through high pressure positive blower, pulverized coal (or natural gas, other fuels) is injected into the kiln, and make full combustion to generate the heat, which make the material form physical and chemical changes, resulting in the expansion phenomenon, after cooling become ceramsite

 

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