| 摘要 |
The mold flux comprises CaO of 28-42 wt.%, SiO2 of 29.0-43.0 wt.%, MgO of below 5.0 wt.%, Al2O3 of below 6.0 wt.%, F of 6.0-10.0 wt.%, Na2O of below 14.0 wt.%, B2O3 of below 1.0 wt.%, total carbon of 1.0-6.0 wt.%, and the balance inevitable impurities with basicity ratio of 1.2-1.3% and crystalline structure ratio of over 60.0%.
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