Corundum-mullite heat-insulating brick
A technology of mullite and thermal insulation bricks, which is applied in the field of refractory materials, can solve the problems of large thermal expansion coefficient, poor thermal stability, and short service life, and achieve the effects of improving thermal shock stability, reasonable organizational structure, and preventing cracking
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Embodiment 1
[0018] Example 1, corundum-mullite insulation brick, the weight ratio of each component is (%):
[0019] Fused white corundum <325 mesh 35%
[0020] αAl 2 o 3 <325 mesh 25%
[0021] γAl 2 o 3 <10μm 15%
[0022] Sillimanite <120 mesh 15%
[0023] Suzhou No. 1 mud <280 mesh 10%
[0024] Plus: Water 28%
[0025] Polystyrene foam ball 0.5-2mm volume ratio is 0.16m 2 / 200kg
[0026] Sawdust 0-0.5mm volume ratio is 0.15m 2 / 200kg
[0027] Before foaming polystyrene foam balls, put 3:1 Al 2 o 3 and SiO 2 Roll a layer of powder in the mixed micropowder to prevent sticking, weigh 200kg of powder according to the above formula and carry out dry mixing first for later use. Pour polystyrene foam balls and wood chips into a forced mixer and mix well, add part of the water while stirring, pour in the dry powder, and finally pour in all the remaining water, stir, and release the trapped material for one day. Vacuum extrusion. The shaped bricks are...
Embodiment 2
[0028] Example 2, corundum-mullite thermal insulation brick, the manufacturing method is the same as that of Example 1, and the weight ratio of each component is (%):
[0029] Fused white corundum <325 mesh 32%
[0030] αAl 2 o 3 <325 mesh 28%
[0031] γAl 2 o 2 <10μm 12%
[0032] Sillimanite <120 mesh 16%
[0033] Suzhou No. 1 mud <280 mesh 12%
[0034] Plus: Water 26%
[0035] Polystyrene foam ball 0.5-2mm volume ratio is 0.155m 2 / 200kg
[0036] Sawdust 0-0.5mm volume ratio is 0.158m 2 / 200kg
Embodiment 3
[0037] Embodiment 3, corundum-mullite thermal insulation brick, the manufacturing method is the same as that of Embodiment 1, and the weight ratio of each component is (%):
[0038] Fused white corundum <325 mesh 38%
[0039] αAl 2 o 3 <325 mesh 22%
[0040] γAl 2 o 3 <10μm 18%
[0041] Sillimanite <120 mesh 13%
[0042] Suzhou No. 1 mud <280 mesh 9%
[0043] Plus: Water 29%
[0044] Polystyrene foam ball 0.5-2mm volume ratio is 0.165m 2 / 200kg
[0045] Sawdust 0-0.5mm volume ratio is 0.145m 2 / 200kg
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