Product detail
Acid refractory bricks for foundry
Product Overview
Fire bricks for casting are high-performance refractory materials specially developed to meet the demanding working conditions of the casting process. They are made by scientifically proportioning and finely processing a variety of high-quality raw materials using advanced production technology. They have excellent high temperature resistance, corrosion resistance, strong thermal stability and many other characteristics, which fundamentally guarantee the efficient and stable operation of the casting furnace.
Excellent performance
High temperature resistance: It can easily cope with extreme high temperature environments and can withstand temperatures of up to 1600℃ – 1800℃ or even higher for a long time, ensuring that the furnace always maintains a stable high temperature state during the critical stage of metal smelting, meeting the precise smelting requirements of different metal materials. Whether it is alloy steel with a higher melting point or common cast iron and cast aluminum, it can provide an ideal smelting temperature field.
Corrosion resistance: Facing the scouring of high-temperature molten metal in the furnace, the erosion of chemically active slag, and the complex redox atmosphere, casting refractory bricks show extraordinary resistance. Its dense structure and special chemical composition combination effectively prevent metal ion penetration and slag adhesion, minimize material loss, extend the service life of the furnace lining, and reduce the cost increase and production interruption risks caused by frequent maintenance.
Thermal stability: During the casting process, the furnace temperature often experiences rapid rise and fall changes, which is a great test for refractory materials. Our refractory bricks have excellent thermal stability due to their excellent thermal expansion coefficient control technology. They can maintain structural integrity under frequent thermal shock conditions without cracking or peeling, providing solid protection for long-term continuous casting operations.
Wide range of applications
Widely used in the field of cast iron casting: In the cupola and electric furnace for cast iron smelting, refractory bricks tightly wrap the furnace cavity and withstand the long-term high temperature roasting and scouring of molten iron. From gray cast iron to ductile iron, it ensures efficient use of heat, reduces the impurity content of molten iron, and helps produce high-quality castings.
Cast steel production: For the more stringent temperature and chemical erosion requirements of the steel casting process, refractory bricks for casting are also at ease. In large electric arc furnaces and refining furnaces, a stable container environment is provided for molten steel refining and pouring, ensuring the purity of steel billets and the uniformity of internal organizational structure, meeting the needs of machinery manufacturing, construction and other industries for high-quality steel castings.
Non-ferrous metal casting: In the smelting and casting of non-ferrous metals such as aluminum, copper, and magnesium, refractory bricks play a key protective role. Due to its inhibitory properties on the formation of non-ferrous metal oxides, it can effectively reduce metal loss and improve the yield rate. It is widely used in the production of high-precision non-ferrous metal castings such as aerospace parts and electronic and electrical components.
Product Parameters
| Element | Function | Content range |
| High Alumina | As the main refractory aggregate, it provides high melting point and high strength to ensure that the brick body maintains structural stability at high temperatures | 50% – 70% |
| Clay | Acts as a binder to make the components tightly bonded, enhance the toughness of the brick body, and facilitate molding | 10% – 20% |
| Silica | Further improves high temperature resistance, optimizes the thermal shock stability of the brick body, and resists sudden temperature changes | 10% – 15% |
| Additives (such as zircon sand, etc.) | A trace amount of addition can refine the grains, improve the corrosion resistance of the brick body, and cope with the complex chemical environment in the furnace | 1% – 5% |
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