How to choose refractory bricks for industrial furnace

 How to choose refractory bricks

1.It resists high temperature and heat load, does not soften or melt. The refractory bricks are required to have a relatively high refractoriness.
2. Resistance to high temperature heat load, no shrinkage in volume and only uniform expansion. The material is required to have high volume stability, the residual shrinkage and residual expansion should be small, without crystal transformation and serious volume effect.
3. It resists the combined action of high temperature thermal load and heavy load, without losing strength, creeping and collapse. The material is required to have quite high normal temperature strength and high temperature thermal strength, high load softening temperature, and high creep resistance.
4. Resistance to rapid changes in temperature or uneven heating, cracking and no peeling. The material is required to have good thermal shock resistance.
5. It resists the chemical erosion of molten liquid, dust and gas, does not deteriorate and does not corrode. The material is required to have good slag resistance.
6. It resists the impact, impact and abrasion of flame, charge and dust, and the surface is not damaged.
7. The material is required to have high compactness and wear resistance at room temperature and high temperature.
8. It resists the influence of high-temperature vacuum operation and atmospheric changes, does not volatilize and does not damage. The material is required to have low vapor pressure and high chemical stability.
9. In addition, in order to ensure the overall quality of the structure or lining made of block refractory brick. The slag resistance and air tightness are good, and it is easy to construct. It also requires the materials to be neat in appearance, accurate in size, to ensure certain tolerances, and to eliminate impermissible defects. In order to withstand the impact and possible mechanical vibration and extrusion during transportation, the material must have a relatively high normal temperature strength. For some special requirements, sometimes the thermal conductivity and electrical conductivity are also considered.

Article Source:How to choose refractory bricks for industrial furnace
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