Fire clay bricks use clay that including shale, coal gangue such powder as the major raw material, undergoing a series of working procedures as mixture treatment, forming, drying and roasting.

　　Al₂O₃ content of fire clay bricks manufactured by Hitech Material over 40%, then Fe₂O₃ content is less than 2.0～2.5%. Fire clay bricks fired at about 1400 ℃,that have the advantages of good integral property.

　　Fireclay bricks for circulating fluidized bed boiler have the excellent characteristics of stable volume in high temperature, wear-proof and anti-slag corrosion.

　　As power plant boiler refractories, fire clay bricks can be used for material-returning vessel, economizer wall, mixing chamber inner wall, flue gas duct and chimney of circulating fluidized bed boiler.