Magnesium aluminum spinel three-layer composite brick and its preparation method
A magnesia-aluminum spinel and layer composite technology is applied in the field of refractory materials, which can solve the problems of increased heat dissipation of the kiln cylinder, increased heat consumption of clinker, and increased temperature of supporting rollers, so as to achieve good refractory heat insulation effect and prolong The service life of the equipment and the effect of saving energy
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Embodiment 1
[0022] Such as figure 1 As shown, the magnesia-alumina-spinel three-layer composite brick of this embodiment includes a heavy working layer 1 , a light heat insulating layer 3 , and a transition layer 2 between the heavy working layer 1 and the light heat insulating layer 3 .
[0023] in:
[0024] The particle gradation and mass percentage of the raw materials used in the heavy working layer 1 are: sintered magnesia with a particle size greater than 1mm: 45%; sintered magnesia with a particle size less than 1mm and greater than 325 mesh: 25%; Purpose sintered magnesia: 21%; fused spinel with a particle size of 325 mesh: 9%. The binding agent adopted during material preparation is magnesium sulfate solution, and its weight is 5% of the weight of the heavy working layer.
[0025] The particle size distribution and mass percentage of the raw materials used in the transition layer 2 are: sintered spinel with a particle size larger than 1mm: 45%; sintered spinel with a particle s...
Embodiment 2
[0034] Such as figure 1As shown, the magnesia-alumina-spinel three-layer composite brick of this embodiment includes a heavy working layer 1 , a light heat insulating layer 3 , and a transition layer 2 between the heavy working layer 1 and the light heat insulating layer 3 .
[0035] in:
[0036] The particle size distribution and mass percentage of the raw materials used in the heavy working layer 1 are: fused magnesia with a particle size larger than 1mm: 35%; fused magnesia with a particle size smaller than 1mm and larger than 325 mesh: 17%; Fused spinel less than 1mm and larger than 325 mesh: 13%; fused magnesium powder with a particle size of 325 mesh: 30%; fused spinel with a particle size of 325 mesh: 5%. The binding agent adopted during material preparation is lignosulfonate solution, and its weight is 3% of the weight of the heavy working layer.
[0037] The particle size distribution and mass percentage of the raw materials used in the transition layer 2 are: fused...
Embodiment 3
[0047] Such as figure 1 As shown, the magnesia-alumina-spinel three-layer composite brick of this embodiment includes a heavy working layer 1 , a light heat insulating layer 3 , and a transition layer 2 between the heavy working layer 1 and the light heat insulating layer 3 .
[0048] in:
[0049] The particle size distribution and mass percentage of the raw materials used in the heavy working layer 1 are: fused magnesia with a particle size larger than 1mm: 45%; fused magnesia with a particle size smaller than 1mm and larger than 325 mesh: 30%; 325 mesh fused magnesium powder: 16%; 325 mesh fused spinel: 9%. The binding agent that adopts when preparing materials is magnesium chloride solution, and its weight is 4% of heavy working layer weight.
[0050] The gradation and mass percentage of raw material particles used in the transition layer 2 are: sintered spinel hollow spheres with a particle size of 0.2-5 mm: 55%; sintered spinel powder with a particle size of 325 mesh: 4...
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