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High alumina bricks for circulating fluidized bed boiler

Al₂O₃ (%)≥65～85; Fe₂O₃ (%)≤2.0
Cold crushing strength(MPa): 50～70
Permanent linear change 1500℃×2h (%) : +0.1~-0.4

Application:

High alumina bricks for circulating fluidized bed boiler can be used as linings of material-returning vessel, economizer wall, mixing chamber inner wall, flue gas duct and chimney.

　　High alumina bricks are produced with selected bauxite chamotte as main raw materials, fired at 1420-1600℃.

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$Refractory solutions and EPC Service$

Index		LZ-65	LZ-70	LZ-75	LZ-80	LZ-85
Al₂O₃ (%)		≥65	≥70	≥75	≥80	≥85
Fe₂O₃ (%)		≤2.0	≤2.0	≤2.0	≤2.0	≤1.8
Refractoriness (℃)		1770	1770	1770	1790	1790
Bulk density (g/cm³)		2.40	2.40	2.45	2.63	2.75
Apparent porosity (%)		≤23	≤23	≤23	≤22	≤22
Refractoriness under load 0.2MPa (℃)		1500	1510	1520	1530	1550
Cold crushing strength (MPa)		50	60	60	65	70
Permanent linear change (%)	1500℃×2h	+0.1~-0.4	+0.1~-0.4	+0.1~-0.4	+0.1~-0.4	+0.1~-0.4

Converter

EAF

Ladle

Secondary refining

Tundish