宣钢4号高炉长期休风复风后快速恢复炉况实践.pdfVIP

1 宣钢 4 号高炉长期休风复风后快速恢复炉况实践 冯艳国 王海涛 张利波 刘宝洋 张二利 马志国 曹建学 （河北钢铁集团宣钢公司炼铁厂） 摘 要 宣钢 4 号高炉长期配吃外购焦，炉缸工作差，煤气流分布不稳定，给长期休风复风后带来一定困难，主要 表现在吃风能力差，由于煤比的提高，焦比的不断降低，使批料的焦炭层变薄，料柱的骨架作用削弱，透气性变差。 恢复炉况时前期加风困难，铁水物理热不足，渣铁排放不净。针对这种情况，通过对复风的探索与研究，逐步摸索 出快速恢复炉况的方法，并取得了一定的效果。 关键词 休风料 焦碳负荷 快速恢复 Vision No. 4 Blast Furnace of Steel Re-wind the Wind after a Long Break fast Recovery Furnace Conditions Practice Feng Yanguo Wang Haitao Zhang Libo Liu Baoyang Zhang Erli Ma Zhiguo Cao Jianxue (Hebei Iron and Steel Group Vision Steel Iron Works) Abstract No. 4 blast furnace of xuansteel company uses coke which Purchased outside ，Hearth works Inefficiently, and gas flow distributes Unstable, so it bring some difficulties to Long-term off-air and re-wind which mainly reflected in the ability of eating wind.Due to the coal ratio increase and the continue reduction of coke rate, the batches of coke material layer thinning，weakening the role of the skeleton material column, and the permeability deteriorating,when recoverys the furnace conditions，it difficult to increase the wind in early Period，to discharged the iron slag Completely ，and the Thermal Physics of molten iron always deficience.In response, in research of rewind, gradually worked out a method of rapid recovery furnace conditions, and have achieved some results. Key words off-air material, coke load, fast recovery 1 引言 3 宣钢 4 号高炉（1800m ）于2005 年 10 月24 日点火开炉，经过炉内积极调整，快速达产。2006 年 3 月 份以来炉内不断强化冶炼，先后在风温、富氧、煤比上取得了长足的进步，经济技术指标取得了较好名次。 2008 年，受原燃料条件变差，炉料结构变化频繁，烧结矿质量和数量满足不了高炉强化冶炼需要，长期配 加落地机烧，2008 年下半年配加 25000 多吨外购焦，导致炉缸工作逐步变差，煤气流分布不稳定，炉内参 数控制波动大，致使 4 号高炉各项经济指标下滑。4 号高炉操作和技术人员通过细化工艺操作，合理匹配五 大制度，积极探索各种原燃料