High Alumina Brick
High Alumina Brick
High alumina brick is a type of refractory brick that contains 90% or more alumina. It is manufactured by using high pressure and heat to form a brick. This brick is characterized by excellent thermal, mechanical, and tensile strength. It is ideal for use in high-temperature environments.
High alumina bricks are widely used in metallurgy, refractory, and mining industries. Bricks with 85% Al2O3 content are suitable for the roofs of electric arc furnaces, steel ladles, aluminum melting furnaces, reheating furnaces, and glass tank furnaces.
Refractories used in furnace construction have changed dramatically over the past 25 years. Originally, refractory materials consisted almost exclusively of silica and fireclay. The development of high alumina bricks used Missouri diaspore clays and bauxite, and alumina of greater purity.
High alumina bricks are fireproof, and are used for several industrial applications. In fact, these bricks are also used for refractory lining of kilns, furnaces, and fireboxes. Because of their low thermal conductivity, they can withstand high temperatures and high pressures.
A high alumina brick can be a variety of shapes. They are usually made from a mixture of finely divided alumina and high-alumina grains that are fused together under controlled chemistry. Then, they are calcined using the Bayer process. The bricks may be either solid or liquid, and the chromium in the brick should not be more than 15%.
The alumina content of a high alumina brick is more than 50%. The composition of high alumina bricks is divided into three groups based on their alumina content: 50%, 60%, and 70% Al2 03 bricks. Another group of refractory bricks contains fused alumina, which is made from a combination of bauxite and diaspore clay.
High alumina bricks are suitable for refractory furnaces, as they have high compressive strength and thermal shock resistance. They also reduce the heat capacity of a furnace wall and increase the furnace's thermal efficiency. Light high alumina bricks can be found in a variety of models and specifications manufactured by Rongsheng refractory bricks manufacturers. These bricks are available at competitive prices and are available with a complete after-sales service system.
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