The study on manufacture of haydite by using industrial solid wastes

Abstract：This paper mainly discusses the use of alumina production waste in the development of Red Mud Haydite technology and methods of preparation conditions.By using red mud as the main raw material, combined with fly ash, gangue, a small amount of additives and other materials, a new-style ceramisite production is produced.The best ratio of raw materials, the sintering temperature and the heat preservation time is determined, which makes and the main properties of the haydite meets GB/T17431.2-1998 standards.Through a series of comparative tests, the results show that, at its best ratio of raw materials, the sintering temperature for 1125～1150℃ and the heat preservation time of 20 min.The density grade system of the Red Mud Haydite is 600 and 410 N particles of pressure.The compressible strength equivalent to 5.5Mpa, beyond 2.0Mpa prescribed in GB/T17431.2-1998, and bibulous rate is 20%, lower than the water rate ≤ 22% requirement prescribed in GB/T17431.2-1998.

Keyword：red mud;haydite;proportion;