Abstract:

The traditional castables are prepared with calcined bauxite base material with simple particle size distribution,and filled with a lot of cement and water,resulting in larger accumulated voids.The penetration of liquid aluminium and electrolyte can not be well prevented during use.In addition,the bonding strength of high alumina cement-bonded castables is reduced due to the removal of a large amount of bonding water.When the temperature reaches between 900  ℃ and 1 100  ℃,most of the high aluminum cement bonding strength will be lost.By partly replacing the bauxite with silicon bricks and introducing water reducing agent and superfine powder into the matrix,the product performance can be effectively improved and the castables for aluminium  reduction cell can be produced.The social effect and economic benefit are obvious.