Non-carbonaceous brick for ultra-low carbon steel external refining steel ladle and preparation method of non-carbonaceous brick
An extra-furnace refining and ultra-low carbon steel technology, which is applied in the field of refractory materials, can solve problems such as spalling damage, long production and delivery cycles, and low production efficiency of cast-molded prefabricated blocks, so as to improve the ability to resist slag penetration and supply Cargo capacity enhancement, the effect of solving peeling damage
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Embodiment 1
[0030] A carbon-free brick for ultra-low carbon steel out-of-furnace refining ladle is composed of aggregate, powder and binder. mm, the binder is a phosphorus-free binder which is a composite of organic binder and inorganic binder.
[0031] The composition and particle gradation of the aggregate are as follows:
[0032] Sintered corundum with a particle size greater than 3mm and less than or equal to 5mm is 15kg,
[0033] Sintered corundum with a particle size greater than 1mm and less than or equal to 3mm is 25kg,
[0034] Sintered corundum with a particle size greater than 0.088 mm and less than or equal to 1 mm is 20 kg.
[0035] The powder composition is as follows: 6 kg of fused magnesia powder, 2 kg of silica fume, 6 kg of alumina micropowder, and 20 kg of sintered corundum powder. In the fused magnesia powder, the MgO content is ≥97.0wt%, and the SiO in the silica fume 2 The content is ≥95.0wt%, and the particle size D50 of the alumina micropowder is 0.5-2.5 micron...
Embodiment 2
[0046] A carbon-free brick for ultra-low carbon steel out-of-furnace refining ladle is composed of aggregate, powder and binder. mm, the binder is a phosphorus-free binder which is a composite of organic binder and inorganic binder.
[0047] The composition and particle gradation of the aggregate are as follows:
[0048] The corundum with a particle size greater than 3mm and less than or equal to 5mm is 18 kg, and the corundum used is sintered corundum and white corundum, and each is 50wt%;
[0049] The corundum with a particle size greater than 1mm and less than or equal to 3mm is 25 kg, and the corundum used is sintered corundum and white corundum, and each is 50wt%;
[0050] The corundum with a particle size greater than 0.088mm and less than or equal to 1mm is 20kg, and the corundum used is sintered corundum and white corundum, and each is 50wt%;
[0051] The powder composition is as follows: 5 kg of fused magnesia powder, 1.5 kg of silica fume, 8 kg of alumina micropowd...
Embodiment 3
[0063] A carbon-free brick for ultra-low carbon steel out-of-furnace refining ladle is composed of aggregate, powder and binder. mm, the binder is a phosphorus-free binder which is a composite of organic binder and inorganic binder.
[0064] The composition and particle gradation of the aggregate are as follows:
[0065] Brown corundum with a particle size greater than 3mm and less than or equal to 5mm is 20kg,
[0066] White corundum with a particle size greater than 1mm and less than or equal to 3mm is 27 kg,
[0067] White corundum with a particle size greater than 0.088mm and less than or equal to 1mm is 18kg.
[0068] The powder composition is as follows: 3 kg of fused magnesia powder, 0.8 kg of silica fume, 10 kg of alumina micropowder, and 11 kg of sintered corundum powder. In the fused magnesia powder, the MgO content is ≥97.0wt%, and the SiO in the silica fume 2 The content is ≥95.0wt%, and the particle size D50 of the alumina micropowder is 0.5-2.5 microns.
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