Refractory brick selection tips

Refractory brick

The use of kilns is inseparable from refractory bricks, but if the details of refractory bricks are not properly handled during the masonry process, it will bring a lot of trouble to the later use. Therefore, when building refractory bricks, pay attention to the angle and also Pay attention to the location, as far as possible, choose refractory bricks with good refractory material performance, and there will be no thermal expansion and contraction and chemical reactions during use, as described in detail below.
How to choose refractory brick:
1. Resist the effect of high temperature heat load, not softening or melting. Refractory bricks are required to have a fairly high degree of refractoriness.
2. Resist the effect of high temperature heat load, the volume does not shrink and only uniform expansion. It is required that the material has high volume stability, the residual shrinkage and residual expansion should be small, without crystal form transformation and severe volume effect.High Alumina Brick
3. Resist the combined action of high temperature heat load and heavy load, without losing strength, creeping and collapse. The material is required to have a fairly high normal temperature strength and high temperature hot state strength, high load softening temperature, and high creep resistance.Ladle magnesia carbon brick
4. Resist the rapid change of temperature or the influence of uneven heating, crack and no flaking. The material is required to have good thermal shock resistance.
5. Resist the chemical erosion of molten liquid, dust and gas, without deterioration and corrosion. The material is required to have good slag resistance.
6. Resist the impact, impact and abrasion of flames and furnace materials and dust without loss of surface.
7. The material is required to have a relatively high density and wear resistance at normal temperature and high temperature.
8. Resist the influence of high temperature vacuum operation and atmosphere change, non-volatile and not damaged. 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 massive refractory bricks. The slag resistance and air tightness are good, and it is convenient for construction. It also requires the material to be neat in shape, accurate in size, guaranteeing a fixed tolerance, and eliminating defects that are not allowed. In order to withstand the impact and mechanical vibration and squeeze that may occur during transportation, the material must have a relatively high normal temperature strength. For some special requirements, sometimes the thermal conductivity and electrical conductivity must be considered.
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