Andalusite Bricks for Furnace

Andalusite refractory bricks use andalusite as raw material, add sillimanite powder, mullite powder, and other powders, add binders according to the proportion, and strictly control the particle size, grade, and impurities such as TiO2 and R2O of the raw materials. After smelting, forming, and drying, it is fired at high temperatures, which can meet the needs of different parts and working environments of modern blast furnace hot blast stoves, and plays an important role in improving the service life of blast furnace hot blast stoves.

Andalusite brick’s physical and chemical indicators

Item	Index
	RH155	RH150	RH145	RH140	RH135
Al2O3  %	≥69	≥65	≥61	≥57	≥53
Fe2O3  %	≤1.0	≤1.0	≤1.2	≤1.2	≤1.5
TiO2  %	≤0.5	≤0.5	≤0.5	≤0.6	≤0.6
Bulk Density  g/cm3	≤20	≤20	≤20	≤20	≤20
Apparent Porosity %	2.55~2.70	2.50~2.65	2.45~2.60	2.40~2.55	2.35~2.50
Cold Crushing Strength   MPa	≥55	≥55	≥50	≥50	≥40
0.2Mpa Refractoriness Under Load  ℃	≥1700	≥1700	≥1650	≥1600	≥1520
Permanent Linear Change Rate  %	1500℃×2h ±0.2	1500℃×2h ±0.2	1500℃×2h ±0.2	1450℃×2h ±0.2	1450℃×2h ±0.2
Creep Rate % 0.2MPa 0~50h	≤0.8 1550℃	≤0.8 1500℃	≤0.8 1450℃	≤0.8 1400℃	≤0.8 1350℃

Features of andalusite brick

1. High-temperature resistance, wear resistance, and corrosion resistance.
2. Good thermal shock resistance.
3. Low creep rate.
4. High softening temperature under load.
5. Can reduce harmful impurities.
6. Good thermal peeling resistance.
7. Various specifications
8. Adequate inventory, delivery on time

The raw material of andalusite brick

Mullite powder, andalusite fine powder, sillimanite fine powder, clay, silicon micro powder, etc.

Andalusite refractory brick manufacturing process

Prepare the raw materials according to the formula ratio, then put the mullite powder, andalusite fine powder, and sillimanite fine powder into the sand mixer for mixing, then add clay and 2% of the total weight of the raw materials for mixing, and then add silicon The micro powder is mixed and pressed into adobe by a brick press machine. After the adobe is dried, it is put into a firing kiln for sintering, that is, it is fired into an andalusite refractory brick.

The use of andalusite bricks in hot blast stoves

For hot blast furnace walls, checker bricks, furnace roof, and combustion chamber (andalusite low creep series).

Andalusite brick transportation

After the factory receives the order, it will be produced as soon as possible and will be shipped within 7-12 days. Customized products will take longer.

Relevant certificate