High-casting speed mold flux
A mold flux and high casting speed technology, applied to high casting mold flux and high casting mold protection. field, it can solve the problem of high crystallizer bonding alarm rate, and achieve the effects of enhancing meniscus heat transfer, improving lubrication performance, and improving inflow conditions
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Embodiment 1
[0034] Example 1: Mold flux chemical composition: CaO 40.3%, SiO 2 33.2%, li 2 O 0.8%, Na 2 O 8.6%, F - 5.5%, B 2 o 3 1.2%, MgO 2.5%, Al 2 o 3 4.5%, Fe 2 o 3 0.6%, C 2.8%. Mold flux physical properties: melting point 1083°C, viscosity 0.079Pa·S at 1300°C, solidification temperature 1122°C.
Embodiment 2
[0035] Example 2: Mold flux chemical composition: CaO 39.8%, SiO 2 33.8%, li 2 O 0.9%, Na 2 O 8.3%, F - 5.6%, B 2 o 3 1.0%, MgO 2.9%, Al 2 o 3 4.3%, Fe 2 o 3 0.7%, C 2.7%. Mold flux physical properties: melting point 1074°C, viscosity 0.083Pa·S at 1300°C, solidification temperature 1116°C.
Embodiment 3
[0036] Example 3: Mold flux chemical composition: CaO 40.6%, SiO 2 32.7%, li 2 O 0.7%, Na 2 O 9.1%, F - 5.2%, B 2 o 3 0.9%, MgO 2.5%, Al 2 o 3 4.7%, Fe 2 o 3 0.8%, C 2.8%. Mold flux physical properties: melting point 1086°C, viscosity 0.072Pa·S at 1300°C, solidification temperature 1128°C.
[0037] Examples 1-3 cast peritectic steel on the slab continuous casting machine, the pouring section is 210mm×900-1200mm, the slag consumption is 0.56kg / T steel when the casting speed is 1.4m / min, and the liquid slag layer thickness on the surface of molten steel 9 ~ 10mm. The test results show that when the mold slag is used, it has good spreadability, heat preservation and melting performance in the mold, the heat transfer of the four surfaces in the mold is stable and uniform, and the surface quality of the slab is good; the consumption of the mold slag is lower than that of the original slag. Increased by 10%, crystallizer heat transfer increased by 5%, crystallizer bo...
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