⑴Feeding belt: This belt generally adopts phosphate combined with
high alumina bricks, anti-stripping high alumina bricks, and also alkali-resistant bricks. The kiln tail feed inlet should use anti-skinned silicon carbide castables.
(2) Lower transition zone: The temperature of this zone is relatively low. The resonance coefficient of the lining refractory brick is low and wear-resistant. Generally, anti-stripping high-alumina bricks are used. The silicon molybdenum bricks have anti-stripping high-aluminum bricks in performance. Peeling high alumina bricks is twice as high.
（3）Upper transition zone: The kiln skin is unstable. The kiln lining is required to have good resistance to atmospheric changes, good thermal shock resistance, small variable coefficient, and abrasion resistance. Magnesia-alumina spinel bricks are recommended abroad. The resonance coefficient of the refractory brick is large, and the resonance coefficient of the foreign silicon molybdenum brick is small, and the abrasion resistance.
（4）Firing zone: The zone has a high temperature and fierce chemical reaction, which requires the refractory brick lining to resist clinker erosion, strong resistance to so2 and co2, environmental protection requires no chromium pollution, and the resistance of magnesium hafnium products to so3 and co2 is not good. The clinker reacts to form Cro2, resulting in a short service life.
Magnesium aluminum spinel bricks are generally used abroad, but it is difficult to hang the kiln skin. Dolomite bricks have poor thermal shock resistance and are easy to hydrate: foreign magnesium iron Spinel bricks have a better effect on hanging kiln skins, but the cost is too high. The use of low-chromite periclase composite spinel bricks in China is better.
（5）Unloading belt: The kiln skin is unstable, the temperature fluctuates greatly, the thermal conductivity of the brick lining is required to be small, wear resistance and thermal shock resistance: spinel bricks are generally recommended in foreign countries, but the thermal conductivity of spinel bricks is large and resistant to Abrasiveness is not good. In recent years, silicon moss bricks and anti-stripping and wear-resistant bricks have been used in China.
