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包钢平炉冶炼条件严苛,长期以来出钢口蚀损严重,恶性跑漏事故时有发生,不能保证持续安全生产。不但日常维修劳动强度很大,而且冷热修率很高,影响炉龄下降。1975年秋,公司决定由钢厂党委领导,以平炉车间干部工人为主,科技处、中试室、无缝厂等单位参加,组成三结合攻关组,和营口县电熔镁砖厂协作,在鞍钢耐火厂协助下,经半年努力,试制成抗蚀、抗热震、耐高温度的镁质三高预制出钢口砖。1976年4月先在4号平炉重点试用,随后又推广应用于所有平炉,半年多实践证明,出钢口寿命平均达到10～15次,比过去提高2～5倍。长
Baotou blast furnace smelting conditions harsh, a long history of serious damage to the tapping hole, a vicious running leakage accidents have occurred, can not guarantee sustained safety in production. Not only the daily maintenance of labor-intensive, and hot and cold repair rate is high, affecting the furnace down. In the autumn of 1975, the company decided to be led by the steel mill party committee, with hearth workshop workers as its mainstay, science and technology department, pilot test room, and seamless factory to form a three-tiered research team and collaborate with Yingkou County fused magnesia brick factory. With the help of Anshan Iron and Steel Refractory Factory, after half a year’s hard work, it made trial production of magnesia three-high prefabricated steel outlet bricks with corrosion resistance, thermal shock resistance and high temperature resistance. In April, 1976, it was firstly piloted at No. 4 open hearth furnace and then applied to all open hearth furnaces. After more than six months, practice proved that the life of tapping mouths averaged 10 to 15 times, which was 2 to 5 times higher than in the past. long