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First of all, we need to understand what is a refractory material. Refractory materials generally refer to inorganic non-metallic materials with refractoriness above 1580°C. It includes natural ores and various products made through certain processes according to certain purposes. It has certain high-temperature mechanical properties and good volume stability and is a necessary material for various high-temperature equipment. It is very versatile.
So what are the types of refractory materials? In terms of properties, refractory materials can be divided into acidic refractory materials, basic refractory materials, aluminum silicate refractory materials, cast refractory materials, neutral refractory materials, special refractory materials, and amorphous refractory materials. Today we will not give a detailed explanation of these refractory materials one by one. In the following encyclopedia knowledge, I will introduce them slowly.
After understanding the classification of refractory materials, we are talking about the properties of refractory materials. It’s actually very simple, and I’ll give you a simple explanation.
1. Physical properties: including structural properties, thermal properties, mechanical properties, serviceability, and operational performance. The structural properties of refractory materials include porosity, bulk density, water absorption, air permeability, and pore size distribution.
2. Thermal properties: including thermal conductivity, thermal expansion coefficient, specific heat, heat capacity, temperature conductivity, thermal emissivity, etc.
3. Mechanical properties: including compressive strength, tensile strength, flexural strength, torsional strength, shear strength, impact strength, wear resistance, creep resistance, bond strength, elastic modulus, etc.
4. Use performance: including refractoriness, load softening temperature, burning line change, thermal shock resistance, slag resistance, acid resistance, alkali resistance, hydration resistance, CO erosion resistance, electrical conductivity, oxidation resistance wait.
5. Workability includes consistency, slump, fluidity, plasticity, cohesiveness, resilience, coagulation, hardening, etc.
In this way, it seems that it is not so difficult to understand whether it is a refractory material. Today I will introduce it to you first. Next, I will slowly introduce it to you in future refractory lectures. Please look forward to it.
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