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本文提出使用三元碱度(CaO+MgO),SiO_2大于1.35的炉渣冶炼低硅低硫生铁,在武钢三、四高炉、唐钢、首钢、鞍钢等厂高炉生产实践得到证实。在国外,日本高炉采用同样方法。炉渣二元碱度高于1.1时,MgO含量提高到10％以上,对炉渣粘度的影响不明显;烧结二元碱度大于1.5,MgO含量增加到2％以上时对烧结矿热强度的影响不显著。各地原料不同,应通过试验决定。
In this paper, we propose a slag smelting low-silicon and low-sulfur pig iron with tri-basicity (CaO + MgO) and SiO 2 greater than 1.35. The practice of blast furnace production in WISCO third and fourth blast furnace, Tangshan Iron and Steel Company, Shougang Group and Anshan Iron and Steel Group was confirmed. Abroad, Japan’s blast furnace using the same method. When the binary basicity of slag is higher than 1.1, the content of MgO increases to above 10%, and the influence on slag viscosity is insignificant. When the binary basicity of sintering is more than 1.5 and the content of MgO increases above 2%, the thermal strength of sintered ore is not affected Significant. Different raw materials around, should be determined by the test.