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acid-proofing firebrick

Chimney Acid proof brick

Acid proof fire brick is a necessary kind of corrosion-resistant material based on quartz, feldspar, clay as the main raw materials, by oxidative decompositing at high temperature.
 
Features
1. Acid proof brick is with acid-resistant, low water absorption.
2. It's not easy to oxidation at room temperature, 
3. With excellent anti-corrosion effect on hydrofluoric acid and hot phosphoric acid on the wet chlorine, brine, hydrochloric acid, sulfuric acid, nitric acid
and other acids at room temperature and any concentration of alkali
 
Technical Data
Item High strength wear-resistant acid resistant brick General acid resistant brick
Type AR -2.3 AR -2.2 AR-2.0 AR-1.8 AR-1.5 AR-1.3
SiO2 % ≤ 70
AL2O3 % ≥ 20
Acid resistance % ≥ 99.8 99.5 97 97 95 95
Refractoriness °C ≥ 1470 1470 1470 1470 1470 1470
Cold crushing strength Mpa ≥ 65 60 30 20 15 10
Bulk density g/cm3 ≥ 2.35 2.25 2 1.8 1.5 1.3
Water absorption % ≤ 6 6.5 11 12 14 16
Apparent porosity % ≤ 14 14 - - - -
 
Application area:
Acid proof brick widely used for the flue,chimney lining of thermal power plant, coke oven roof, acid resistance pool, and chemical industry.

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