Production Technology and Key Equipments for Ceramsite Produced from Coal Fly Ash and Clay

Abstract

Under the background that solid wastes have been produced and increased continuously, how to change waste into treasure has become an important research topic to achieve sustainable development. Based on a cooperating project with an enterprise, the production technology and key equipments for ceramsite produced from coal fly ash and clay have been studied which is of great significance not only to carry out the industrial solid waste disposal and make best use of resource but also to guide the running of the production line.

Preparation of Lightweight Ceramsite from Solid Waste Using SiC as a Foaming Agent

“…Ceramsite, which contains inorganic components such as Al 2 O 3 , SiO 2 , Fe 2 O 3 , FeO, CaO, MgO, Na 2 O, and K 2 O, has been used as a construction material, for example in cement mortars, concrete mixtures, bricks, as fine aggregate in mortars and ceramic materials, or as filter media in reactors for treating municipal/industrial wastewater/secondary effluent in wastewater treatment plants [ 5 , 6 ]. Traditional ceramsite is sintered with clay and shale, requiring high-quality clay and shale mines, which cause a certain degree of damage to the environment [ 7 , 8 ]. The large amount of silica-aluminous substances and other alkaline melts contained in solid waste are similar to the chemical components required for sintered ceramsite, and the preparation of ceramic pellets can be achieved by the reaction between different solid wastes.…”