Carbon brick is made from high quality carbon containing materials and acid proof organic compound, which is shaped under high pressure and bonded by high quality bonding material, giving high mechanical strength.
Chemical Carbon bricks are used in chemical- resistant construction in exposures which cannot readily be handled by other kinds of brick.
Carbon filled materials are every- where indicated under conditions involving HF and strong alkalis. Brick made of carbon is, at this time, the only construction units which can with-stand these chemicals. The relatively high porosity of carbon brick and other units explains to a large degree their ability to withstand thermal shock and to dissipate compressive stresses better than any other types of masonry units.
Carbon brick are inherently non wetting and highly resistant to many acids, alkali, salts, and solvents and combinations of these chemicals at varying temperatures and concentrations.
General Guide to Chemical Resistance of carbon Brick
Note :- This table is intended for use as a general guide to the resistance of carbon brick in immersion service at ambient temperature. Specific recommendations should be obtained from our technical department.
|Nitric Acid, to 40 %||Recommended|
|Hydrofluoric Acid, to 40%||Recommended|
|Blend-25 % Nitric, 10% Hydrofluoric, 65% Water||Recommended|
|Hydrochloric Acid, to 35%||Recommended|
|Phosphoric Acid , to 75%||Recommended|
|Sulfuric Acid, to 50%||Recommended|
|Sodium Hydroxide, to 50%||Recommended|
|Potassium Hydroxide, to 50%||Recommended|
Physical and Chemical Properties
|SPECIFICATION||Unit||VALUE as per ASTM C 1160||Value as per
|DENSITY||kg/m3||–||1500 – 1600||–|
|COLD COMPRESSIVE STRENGTH, min.
(at 7 Days)
|MPa||41||> 60||C 1106|
|MODULUS OF RUPTURE, min.||MPa||10||> 10||C 1106|
|WATER ABSORPTION, max.||% by wt.||10||< 8||C 1106|
|ASH CONTENT, max.||%||8||< 3||C 561|
|THERMAL CONDUCTIVITY (at 200 °C)||W/MK||–||2.28||C 1106|
Size : 230mm L *115mm W*—–mm T (Thickness : Minimum 10mm and Maximum 100mm)
- The lining of phosphoric acid reactor
- The lining of phosphoric acid storage
- The lining of quenching tower and acid –washing launder
- The lining of desulfurizing tower and chimney in power plant.
Carton or wooden pallet
Do not place carbon brick directly against a lead lining or against stainless steel .Direct contact between carbon and many metals will set up a galvanic cell with the metal cathodic to the carbon, and cause the wasting of the metal. For the same reason, avoid contact between such metals and the carbon-filled mortars used to join the carbon units. A voltage breaker should be inserted between them.
Acid/Alkali Resistant Bricks / Tiles
- Arcotiles (Acid /Alkali Resistant Bricks/Tiles)