Preparation method of hard erosion resistant alumina fiberboard hearth material
A technology of alumina fiber and corrosion resistance, which is applied in the field of inorganic refractory materials, can solve the problems of reduced fire resistance and large porosity of fiberboard, and achieve the effects of increased life, extended life, and easy operation
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[0020] A kind of preparation method of hard erosion-resistant alumina fiberboard furnace material of the present invention comprises the following steps:
[0021] Step 1, chop the alumina fiber into a length of 2mm~5mm, and put it into the mixing tank; the alumina fiber (commercially available) refers to Al 2 o 3 Polycrystalline fibers with a content of 95% by weight;
[0022] Step 2. Add alumina micropowder to the alumina fiber, and stir to mix it fully with the alumina fiber; Alumina micropowder with a purity greater than 99%, the mass ratio of alumina fiber to alumina micropowder is 1: (0.5~1.5);
[0023] Step 3. Add the aqueous silica sol solution dropwise as a binder to the mixture of alumina fiber and alumina micropowder, and keep stirring while adding until thick mud is obtained. The concentration of the aqueous silica sol solution is 5wt%;
[0024] Step 4. Leave the mud to stand for a certain period of time, then pour it into the fiberboard forming mold, and contin...
Embodiment 1
[0031] Chopped the alumina fiber to a length of 2mm~5mm, weighed 10kg and put it into the mixing tank; according to the mass ratio of alumina fiber:alumina micropowder=1:1, mixed 10kg of alumina micropowder, stirred it with Alumina fibers are fully mixed evenly; add a concentration of 5wt% silica sol aqueous solution as a binder dropwise to the mixture of alumina fibers and alumina micropowder, and keep stirring while adding until thick mud is obtained; Leave the mud to stand for 4 hours, then pour it into the fiberboard forming mold, shake the mold continuously on the vibration table for 20 minutes, so that the air bubbles inside the wet fiberboard blank can be discharged, and then flatten the upper surface of the wet blank; leave the wet fiberboard blank for molding In the mold, after drying naturally at room temperature, open the mold, take out the solidified and shaped fiberboard body, and place it in an oven at 110°C for 8 hours until the fiberboard is completely dry and h...
Embodiment 2
[0033]Chopped the alumina fiber to a length of 2mm~5mm, weighed 10kg and put it into the mixing tank; according to the mass ratio of alumina fiber:alumina micropowder=1:0.5, mixed 5kg of alumina micropowder, stirred it with Alumina fibers are fully mixed evenly; add a concentration of 5wt% silica sol aqueous solution as a binder dropwise to the mixture of alumina fibers and alumina micropowder, and keep stirring while adding until thick mud is obtained; Leave the mud to stand for 2 hours, then pour it into the fiberboard forming mold, shake the mold continuously on the vibration table for 10 minutes, so that the air bubbles inside the wet fiberboard blank can be discharged, and then flatten the upper surface of the wet blank; leave the wet fiberboard blank for molding In the mold, after drying naturally at room temperature, open the mold, take out the solidified and shaped fiberboard body, and place it in an oven at 120 ° C for 6 hours until the fiberboard is completely dry and...
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