Tundish magnesium calcium ladle cover casting materials and preparation method thereof
A magnesia-calcium, tundish technology, applied in the field of refractory materials for tundish, can solve problems such as poor thermal shock resistance, peeling, and steel structure burning, achieve good thermal insulation performance and thermal shock resistance, and improve thermal shock stability The effect of improving the strength at medium temperature
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[0035] Example 1
[0036] A tundish magnesium-calcium capping castable, comprising the following components by weight percentage:
[0037] 20wt% of magnesia particles, with a particle size of 0.088-10mm; 20wt% of magnesia-calcium sand particles, with a particle size of 0.088-10mm; 5wt% of quicklime particles, with a particle size of 0.088-8mm; 10wt% of magnesia fine powder, with a particle size of less than 0.088mm; organomagnesium compound 0.5wt%, particle size less than 0.088mm; organic calcium 1wt%, particle size less than 0.088mm; thermoplastic micropowder 2wt%, particle size less than 0.045m; magnesium oxide micropowder 2wt%, particle size less than 0.01mm and Water reducing agent 0.1wt%.
[0038] Wherein, in this embodiment, the MgO content in the magnesia particles is greater than 99 wt %. The CaO of the magnesia-calcium sand particles is greater than or equal to 20wt%. The CaO content of the quicklime particles is greater than 95 wt%. The MgO content of the magnesi...
Example Embodiment
[0044] Example 2
[0045] A tundish magnesium-calcium capping castable, comprising the following components by weight percentage:
[0046] 30wt% of magnesia particles, with a particle size of 0.088-10mm; 30wt% of magnesia-calcium sand particles, with a particle size of 0.088-10mm; 10wt% of quicklime particles, with a particle size of 0.088-8mm; 15wt% of magnesia fine powder, with a particle size of less than 0.088mm; 2wt% organomagnesium compound, particle size less than 0.088mm; organic calcium 4wt%, particle size less than 0.088mm; thermoplastic micropowder 4wt%, particle size less than 0.045m; magnesium oxide micropowder 5wt%, particle size less than 0.01mm and reduced Water agent 0.15wt%.
[0047] Wherein, in this embodiment, the MgO content in the magnesia particles is greater than 99 wt %. The CaO of the magnesia-calcium sand particles is greater than or equal to 20wt%. The CaO content of the quicklime particles is greater than 95 wt%. The MgO content of the magnesia...
Example Embodiment
[0053] Example 3
[0054] A tundish magnesium-calcium capping castable, comprising the following components by weight percentage:
[0055] 40wt% of magnesia particles, with a particle size of 0.088-10mm; 40wt% of magnesia-calcium sand particles, with a particle size of 0.088-10mm; 15wt% of quicklime particles, with a particle size of 0.088-8mm; 20wt% of magnesia fine powder, with a particle size of less than 0.088mm; 3wt% organomagnesium compound, particle size less than 0.088mm; organic calcium 6wt%, particle size less than 0.088mm; thermoplastic micropowder 6wt%, particle size less than 0.045m; magnesium oxide micropowder 8wt%, particle size less than 0.01mm and reduced Water agent 0.2wt%.
[0056] Wherein, in this embodiment, the MgO content in the magnesia particles is greater than 99 wt %. The CaO of the magnesia-calcium sand particles is greater than or equal to 20wt%. The CaO content of the quicklime particles is greater than 95 wt%. The MgO content of the magnesia ...
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