refractory materials

  How to improve the thermal shock resistance of high alumina bricks ? Using grade 1 bauxite clinker and fused white corundum powder as raw materials, adding an appropriate amount of expansion agent, forming and heat treatment at 800 ℃, high-alumina bricks with good thermal shock stability can be obtained Using grade 1 bauxite clinker and fused white corundum powder as raw materials, adding an appropriate amount of expansion agent, molding and heat treatment at 800 ℃, high-alumina bricks with good thermal shock stability can be obtained. in The chemical composition of grade 1 bauxite clinker is (%): Al2O3: 83.50, SiO2: 9.39, Fe2O3: 1.29, K2O+Na2O: 0.86 The Al2O3 content of fused white corundum powder is 95.36% Clay particle ratio: 15~35% of first-grade soil clinker <5mm, 20~40% of first-grade clinker fine powder <0.088mm, 5~10% of fused white corundum powder, andalusite and Sillimanite compound expansion agent 6~15%, chemical binder 6~10%. Mixing is carried out in ...

  What is the difference between insulation brick and refractory brick? The main function of insulation bricks is to keep heat and reduce heat loss. Insulation bricks are generally not in direct contact with the flame, and refractory bricks are in direct contact with the flame. High temperature bricks are mainly used for flame burning. It is usually divided into two types: amorphous refractories and shaped refractories. Amorphous refractory materials, also called castables, refer to mixed particles composed of various aggregates or aggregates and one or more binders, which must be uniformly mixed with one or more liquids with strong fluidity. Fixed refractory materials: ordinary refractory bricks have standard shape rules and can be temporarily cut as needed. The main differences between insulation bricks and refractory bricks are as follows: 1. Thermal insulation performance. The thermal conductivity is generally between 0.2-0.4 (average temperature 350±25°C), and the ...

  What is refractory ? Refractory refers to the temperature in degrees Celsius at which a conical specimen of refractory material can withstand the action of high temperatures without softening and melting under no load. However, refractories cannot be completely described by the definition of refractoriness, and 1580°C is not absolute. Yyrefractory refractory raw materials are a class of inorganic non-metallic materials whose refractoriness is not lower than 1580℃. Materials now defined whose physical and chemical properties allow their use in high temperature environments are called refractories. Refractory materials are widely used in metallurgy, chemical industry, petroleum, machinery manufacturing, silicate, electric power and other industrial fields. They are used the most in the metallurgical industry, accounting for 50%-60% of total production. The workability of refractory materials includes consistency, slump, fluidity, plasticity, cohesion, resilience, co...