Mullite refractory brick is a crucial material used in high temperature industrial applications. It is widely used in furnaces, kilns and other thermal processing equipment. It is composed of mullite, alumina and other raw materials. The composition and manufacturing process of mullite refractory bricks determine their quality and performance.
The classification of mullite refractory bricks is based on their alumina content. They are divided into three grades: high alumina, middle alumina and low alumina. High alumina mullite refractory bricks have an alumina content of 70%-90%, while middle and low alumina bricks have 60%-70% and 50%-60% alumina content, respectively. The different grades of mullite refractory bricks have different characteristics and are used in different thermal processing environments.
The technical parameters of mullite refractory bricks play a key role in their performance. They include the compressive strength, thermal conductivity, thermal shock resistance, creep rate and refractoriness. High-quality mullite refractory bricks typically have high compressive strength, low thermal conductivity, excellent thermal shock resistance, low creep rate and high refractoriness.
The production process of mullite refractory bricks involves several steps, including raw material preparation, mixing, forming, drying and firing. The raw materials are carefully selected and mixed in precise proportions. The mix is then shaped into bricks through pressing, extrusion or casting. The shaped bricks are dried and then fired at high temperatures to achieve a dense and stable structure. The firing process is critical as it determines the final properties of the mullite refractory bricks.
In conclusion, mullite refractory bricks are essential materials in high temperature industrial applications. They are classified according to their alumina content, have specific technical parameters and require a carefully controlled production process to ensure optimal performance. By using high-quality mullite refractory bricks, industries can achieve efficient operations, reduce energy consumption and ensure product quality.
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