High Alumina Brick For Hot Blast Furnace

Description

The hot blast furnace is made of high alumina bricks mixed with high alumina bauxite clinker and partially bonded clay. Provide a series of different sizes of bricks with Al2O3 content greater than 48%, in order to pursue the efficiency and convenience of hot blast furnace construction, as well as the stability and long life of later maintenance and use.

Features

Good creep resistance
High temperature durability
Good thermal shock resistance
Good economic benefits for construction and maintenance

Specification

Index
Al2O3 (%)	≥75	≥65	≥65	≥65	≥60	≥50
Apparent porosity (%)	≤20	≤21	≤22	≤22	≤22	≤23
Bulk density g/cm³	2.65~2.85	2.50~2.70	2.40~2.60	2.35~2.55	2.30~2.50	2.30~2.50
Normal temperature compressive strength (MPa)	60	60	55	55	55	50
Creep rate (%) 0.2MPa×50h	1550℃ 0.8	1450℃ 0.8	1400℃ 0.8	1350℃ 0.8	1300℃ 0.8	1270℃ 0.8
Reburning line change (%) 1550℃×2h 1450℃×2h	0.1~-0.2 –	0.1~-0.2 –	– 0.1~-0.2	– 0.1~-0.4	– 0.1~-0.4	– 0.1~-0.4

Application

High alumina bricks for hot blast furnaces are mainly used in furnace linings and checker bricks in high temperature parts, checker bricks in the lower part of regenerators, air mixing chambers, hot blast main pipes in combustion chambers, branch pipes, hot blast furnaces and other parts.