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Acid Resistant Bricks

The main composition of acid resistant brick is silica. Acid resistant bricks is sintered at high temperature to form large amount of aluminum enriched andalusite, which has strong resistance to acid corrosion. As acid resistant brick has dense structure, low water absorption rate, it can also resist alkaline corrosion at room temperature.

The Properties of Acid Resistant Brick

1. Can form corrosion resistant material during production.
2. Good acid and alkali corrosion resistance.
3. Low water absorption rate.
4. Good oxidization resistance at room temperature.

Acid Resistant Brick Physicochemical Index

Item Index
SiO2 69.8%
Al2O3 22.5%
K2O 2.7%
Na2O 0.95%
CaO 0.82%
MgO 0.12%
FeO 0.49%
Acid fastness 99.86
Bulk density 2.31~2.4g/cm3
Water absorption ≤2.0%
Modulus of rupture ≥58.8Mpa
Crushing strength ≥120Mpa

Lightweight Acid Resistant Brick Physiochemical Indexes

Index Special acid-proof brick Lightweight acid-proof brick
SiO2(%) ≥ 65 65
Bulk Density(g/m³) 1.6-1.8 1.0-1.3
Cold Crushing Strength(Mpa) ≥ 15 10
Thermal Conductivity(W/m.k)  ≤ 0.65 0.45
Water Absorption(%)  ≤ 15 working face 5
Acid-proof rate(%)  ≤ 98 97
Service temperature( ℃)  ≤ 1000 1000

The Application of Acid Resistant Bricks

Acid resistant bricks are widely used in petrol industry, chemical industry, metallurgy, power plant, chemical fiber, paper industry, pharmacy, fertilizer, food, galvanization factory, as well as acid tower, tank, bath, groove and other corrosion resistant projects. Acid resistant porcelain bricks are also used at sewage pipe and outdoor grounds.

Lightweight acid resistant bricks are mainly used at acidic atmosphere which suffers acidic gases corrosion, such as CFB boiler chimney, coking oven chimney and flue, etc. Lightweight acid resistant bricks should not contact with acidic liquid directly.

We specialize in refractory products for nearly 20 years, covering a full range of Graphite Electrode, High Alumina Bricks, Sillica Bricks, Fused AZS 33/36/41 Bricks, Mullite JM 23/26/28/30 Bricks, Magnesia Bricks, Magnesia Chrome Bricks, Magnesia Carbon Bricks, SiC Bricks, Dense and Light Weight Insulaing Castables and other related products for more sophisticated applications.


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