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ＰＮ－ＳＦ１自流浇注料具有施工方便、强度高、导热系数低、体积稳定性好等优点。石横特殊钢厂采用自流浇注料砌筑３０ｔ钢包和２５ｔＬＦ精炼包的永久层，经合理施工，严格养护、烘烧制度，钢包使用寿命分别比砌砖永久层钢包提高１５．２％和１２．８％，年降耗５６．５万元。
PN-SF1 self-flowing castable has the advantages of convenient construction, high strength, low thermal conductivity and good volume stability. Shiheng Special Steel Works uses self-flowing castable to build the permanent layer of 30t ladle and 25tLF refining bag. After reasonable construction, strict maintenance and baking system and ladle service life are 15.2% and 12% higher than that of the permanent layer ladle. 8%, annual consumption of 565,000 yuan.