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CN104858381B 一种新型含铝钢连铸中间包覆盖剂及其应用 失效 - 权利终止 复审申请

一种新型含铝钢连铸中间包覆盖剂及其应用
摘要：
本发明涉及一种新型含铝钢连铸中间包覆盖剂及其应用；属于钢铁连铸技术领域。本发明所述中间包覆盖剂，以质量百分比计包括下述组分：CaO 26～35％、SiO26～13％、Al2O322～32％、MgO 5～12％、(Na2O+Li2O)8～15％、B2O32～8％。该中间包覆盖剂具有粘度低(1300℃时为0.5～1.2Pa·s)、熔化温度低(1180～1300℃)，能够高效吸收含铝钢中的夹杂物，并改善中间包内钢水的洁净度，很好地防止钢液二次氧化，改善铸坯质量，同时具有良好的保温性能等特点。本发明所设计的中间包覆盖剂，能很好地用于Al质量百分含量在0.3～3％范围内的含铝钢连铸过程。
摘要（英）：

The invention relates to a novel aluminum steel continuous casting tundish covering agent and the application thereof and belongs to the technical field of steel continuous casting. The tundish covering agent comprises components, by mass, 26-35% of CaO, 26-13% of SiO, 22-32% of Al2O3, 5-12% of MgO, 8-15% of (Na2O+Li2O) and 2-8% of B2O3. The tundish covering agent has the low viscosity of 0.5-1.2 Pa.s at the temperature of 1300 DEG C and has the low melting temperature of 1180 DEG C-1300 DEG C, can effectively absorb impurities in aluminum steel, improve the cleanness of molten steel in a tundish, well prevent the molten steel from being oxidized for the second time, and improve the quality of a casting blank, and has the advantages of being good in heat preserving property and the like. The designed covering agent can be well applied to the aluminum steel continuous casting process with the Al mass percentage within the range of 0.3-3%.

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