Refractory bricks made from natural silica-containing rocks, primarily quartz, are called silica refractory bricks. Rongsheng Silica bricks contain at least 93% SiO2 and no more than 1.5% Al2O3, as even a small amount of alumina significantly reduces refractoriness. A key aspect of silica brick manufacturing is the rate of conversion between different silica variants. Get … Read more
Phosphorus impregnation of high-alumina bricks refers to placing fired high-alumina bricks in a container and impregnating them with phosphoric acid for more than two hours. After low-temperature treatment, their physical properties are significantly improved, making them suitable for use in harsh industrial furnace linings. Indicators of High-Alumina Bricks After Phosphating According to actual tests, after … Read more
The selection of furnace wall materials for waste heat boilers is of great significance in furnace wall design. Based on the materials constituting the furnace wall, furnace wall materials include refractory materials, insulation materials, sealing materials, and filling materials. Refractory materials for waste heat boiler furnace walls refer to non-metallic materials with a refractoriness of … Read more
The properties of silicon nitride-bonded silicon carbide bricks: They not only possess high density, high strength, good thermal shock resistance, high softening point under load, good thermal conductivity, and high resistivity, but also exhibit excellent resistance to melting and erosion by cryolite, aluminum fluoride, sodium fluoride, and calcium fluoride, as well as oxidation resistance. They … Read more
High-alumina bricks can be compared with anti-spalling high-alumina bricks in terms of raw materials and processes, performance characteristics, application fields, and costs. Raw Materials and Process Proportions Both high-alumina bricks and anti-stripping high-alumina bricks primarily use high-alumina bauxite as their raw material. However, anti-spassing high-alumina bricks incorporate zircon during the production process. This addition significantly … Read more
The refractory material for ferroalloy electric furnaces comprises three parts: furnace roof refractory material, furnace wall refractory material, and molten pool refractory material (furnace slope and furnace bottom). During ferroalloy smelting, the refractory materials in these different parts are under different working conditions. To ensure the normal operation of the electric furnace, refractory materials with … Read more
Phosphoric acid hardly reacts with acidic oxides at room temperature and does not harden; therefore, it is not suitable as a binder for acidic refractories. Phosphoric acid reacts with amphoteric oxides (such as Al2O3) at room temperature to form a hard solid, and the reaction rate between them can be controlled, making it particularly suitable … Read more
With the advancement of ladle refining technology, melting temperatures and times have increased, making the operating environment of ladle refractories increasingly demanding. Corundum self-flowing castables are primarily used to fill gaps around air bricks and base bricks. During use, they are subject to mechanical erosion from molten steel tapping and argon-blowing stirring. Intermittent production also … Read more
Refractory materials are crucial for ensuring the safe operation of glass furnaces. The configuration and quality of refractory materials used in glass furnaces directly determine the quality of the glass and the lifespan of the furnace. The rapid development of the glass industry has promoted the development and technological advancement of refractory materials for glass … Read more
Basic refractories feature high refractory properties, high-temperature strength, and resistance to alkaline slag corrosion. They are used in industries such as chemicals, petroleum, silicates, machinery manufacturing, and power generation. They are particularly widely used as auxiliary materials in the metallurgical industry. Common basic refractories include magnesia bricks, magnesia-chrome refractories, periclase-spinel refractories, periclase-ferroalumina-spinel refractories, and dolomite. … Read more
