Acid-resistant bricks are a type of siliceous refractory material and are fired at high temperature., It has excellent acid resistance, high temperature resistance, and low water absorption. Widely used in chemical plants, acid and alkali workshop floors and walls, acid storage tanks or acid medium tanks in petroleum, fertilizer, pharmaceutical and other industries, lining materials for flue gas desulfurization towers in power plants, chimneys for acid gas emissions, and the inner walls of ventilation ducts, etc.
Description:
Acid-resistant bricks are a high-performance anti-corrosion material. Their unique chemical composition is the key to achieving excellent acid resistance. Acid-resistant bricks are mainly made of high-silicon raw materials combined with a variety of mineral components. After high-temperature firing, they have excellent chemical stability and mechanical strength.
Silicon dioxide (SiO₂): 65%~75%, giving acid-resistant bricks acid resistance and high-temperature stability.
Alumina (Al₂O₃): 15%~25%, enhancing strength and thermal shock resistance.
Iron oxide (Fe₂O₃): 1%~3%, assisting flux and improving density.
Low alkali metal oxides (Na₂O, K₂O): strictly controlled to ensure excellent acid resistance.
Application of Acid Proof Bricks:
Acid-resistant bricks are widely used in industrial fields that require acid and corrosion resistance, such as chemicals, metallurgy, electricity, petroleum, and pharmaceuticals.
Chemical industry: acid pool, alkali pool, reactor, chemical equipment lining and workshop floor anticorrosion.
Metallurgical industry: pickling tank lining, smelting flue, flue gas desulfurization tower anticorrosion materials.
Power industry: desulfurization device and flue lining of thermal power plant.
Petroleum industry: refinery equipment lining, desulfurization device and acid storage tank.
Pharmaceutical and food processing industry: brewing fermentation tank, corrosive workshop floor of pharmaceutical factory.
Water treatment industry: acid chemical reaction tank lining in sewage treatment plant.
Construction field: chimney lining, anticorrosive wall and laboratory equipment.
How to choose high quality acid proof bricks?
Silicon dioxide content (SiO₂): The SiO₂ content of high-quality acid proof bricks is usually between 65% and 75%. The higher the SiO₂ content, the stronger the acid resistance of the brick.
Water absorption rate: Acidproof bricks with a water absorption rate of less than 4% are of better quality and can prevent acid penetration and corrosion.
Compressive strength: The compressive strength of high-quality acid-resistant bricks should be above 30MPa and be able to withstand mechanical loads.
Acid resistance: Check the results of the acid immersion test. Generally, the solubility of good acid-resistant bricks in acidic media (such as sulfuric acid and hydrochloric acid) is close to zero, and the corrosion loss is less than 0.2%.
Heat resistance: If the brick is used in a high-temperature acidic environment, attention should be paid to high-temperature resistance, which can generally withstand temperatures around 1000°C.
How much do acid-resistant bricks cost?
The price of acid-proof bricks exported from China is generally between US$150 and US$500 per ton (FOB price). Ordinary acid-resistant bricks: about US$150~250/ton. High-performance acid-resistant bricks : about US$300~500/ton or higher. CIF (Cost at Port) is usually 20~50% higher.
Acidproof bricks manufacture:
Rongsheng Refractory Fire Bricks Manufacturer focus on acid proof bricks production over 20years. RS has annual production capacity of 300,000 tons. We have passed ISO9001 quality management system, ISO14001 environmental management system and GB/T28001 occupational health and safety management system certification, as well as CE, SGS, TUV, BV, INTERTEK and other international certifications. we have 50 professional engineers and advanced technology guidance.
our acid proof bricks export more than 80 countries. We wholesale all kinds of acid proof bricks to Vietnam, Korea, Malaysia, Turkey, South Africa, Japan, Russia, Cambodia, India, Myanmar and so on at lowest price.
We provide acid proof bricks in various specifications and support customized production to ensure that they meet your needs in highly corrosive environments. Choose high-quality acid-proof bricks to make your equipment and facilities more durable and safer!