A kind of thermal insulation board for mold casting resistant to molten steel erosion and its preparation method
A thermal insulation board and die-casting technology, which is applied in the field of thermal insulation materials, can solve the problems of equipment damage, difficulty falling off, powder dropping, and slag dropping, etc.
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Embodiment 1
[0034] Example 1 Preparation of traditional insulation board
[0035] Add 40 kg of quartz sand, 50 kg of high alumina ceramic fiber, 20 kg of waste newspaper, and 30 kg of ceramic hollow balls into the mixing tank for pulping. After stirring for 15 minutes, put the stirred slurry into the storage tank for molding.
[0036] When molding, first add the slurry that has been stirred in advance into the molding mold quantitatively, flatten and then suction filter. While suctioning and filtering, flatten with a trowel, stop suctioning and filtering, turn over the mold, support the slab of the insulation board with a pallet, send it to a drying kiln for drying; take it out after drying at 100°C for 12 hours, and check its physical and chemical properties according to the standard Indicators and dimensions, those that meet the standards are put into storage and are ready for use.
Embodiment 2
[0037] Example 2 Preparation of thermal insulation panels wet-coated with corundum-based coatings
[0038] Preparation of corundum paint: the corundum paint used in the dry coating is composed of the following components by weight percentage: 325 mesh corundum powder 83.45%, phenolic resin powder 5%, urotropine 0.5%, 325 mesh silicon carbide 10%, CMC 0.5%, explosion-proof fiber 0.5%, aluminum powder 0.05%. Mix all the components evenly and pulverize to get the product. Add the prepared corundum paint to water, the mass volume ratio of the corundum paint to water is 1g / ml, and then use a roller brush to coat it on the steel surface of the heat insulation board prepared in Example 1, and repeat it 3 times , the amount of coating each time (converted into powdery corundum coating without adding water) is 300g / m 2 , use a pallet to support the heat insulation board coated with corundum paint, and then send it to the drying kiln for drying;
[0039] After drying at 100°C for fou...
Embodiment 3
[0040] Example 3 Preparation of thermal insulation boards dry-coated with corundum-based coatings
[0041] Preparation of corundum paint: the corundum paint used in the dry coating is composed of the following components by weight percentage: 325 mesh corundum powder 83.45%, phenolic resin powder 5%, urotropine 0.5%, 325 mesh silicon carbide 10%, CMC 0.5%, explosion-proof fiber 0.5%, aluminum powder 0.05%. Mix all the components evenly and pulverize to get the product.
[0042] Add 40 kg of quartz sand, 50 kg of high alumina ceramic fiber, 20 kg of waste newspaper, and 30 kg of ceramic hollow balls into the mixing tank for pulping. After stirring for 15 minutes, fill the mold with the stirred slurry and wait for the water to be absorbed quickly. When using a 100-mesh standard sieve, sprinkle the powdered corundum paint evenly on the slurry on the steel surface of the heat insulation board in the mold. The dosage of the corundum paint is 300g / m 2 ;Use the remaining moisture o...
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