- Time:Jul 14, 2023
The physical and chemical indicators of corundum mullite castables include the following important parameters:
1. Refractoriness: Refractoriness is a measure of the ability of refractory materials to resist high temperatures. For corundum mullite castables, its refractoriness is usually above 1700°C and can withstand extremely high temperatures.
2. Cold Crushing Strength: Cold Crushing Strength refers to the maximum pressure on the castable after a certain curing time at room temperature. The room temperature compressive strength of corundum mullite castables is usually above 10 MPa, which has good compressive properties.
3. Thermal Shock Resistance: Thermal shock resistance refers to the resistance of refractory materials under rapid temperature changes or thermal shock environments. Corundum mullite castables have good thermal shock stability and can withstand rapid temperature changes at high temperatures without cracking or damage.
4. Coefficient of Thermal Expansion: The coefficient of thermal expansion describes the degree of change in the length or volume of a material when the temperature changes. Corundum mullite castable has a low coefficient of thermal expansion, which makes it less prone to significant deformation and damage under high temperature conditions.
5. Thermal Conductivity: Thermal conductivity indicates the ability of a material to conduct heat. Corundum mullite castables generally have low thermal conductivity, so they can effectively insulate heat and reduce heat transfer.
6. Specific Heat Capacity: Heat capacity refers to the energy required for a unit mass of material to absorb or release heat. The heat capacity of corundum mullite castable is relatively high, which can absorb and store a large amount of heat energy.
7. Chemical Resistance: Corundum mullite castables have good resistance to acid and alkali corrosion, can be used stably for a long time in acidic or alkaline media, and are not susceptible to chemical corrosion.
These physical and chemical indicators directly affect the key properties of corundum mullite castables such as refractoriness, thermal shock stability and erosion resistance. According to specific application requirements, these indicators can be optimized by adjusting the formula and process to meet the requirements of different high-temperature industrial environments.
