提高板坯热送热装温度的连铸二冷配比优化  

OPTIMIZATION OF SECONDARY COOLING RATIO FOR CONTINUOUS CASTING TO INCREASE THE HEAT DELIVER AND HOT CHARGING TEMPERATURE OF SLAB

作　　者：葛阳阳 侯中仕 张琦 韩竞雄 冯俊鹏 Ge Yangyang;Hou Zhongshi;Zhang Qi;Han Jingxiong;Feng Junpeng(Handan Iron and Steel Group Co.,Ltd.,Handan 056403,Hebei)

机构地区：[1]邯郸钢铁集团有限责任公司,河北邯郸056403

出　　处：《河北冶金》2024年第8期55-58,共4页Hebei Metallurgy

摘　　要：河钢集团邯钢公司能嘉新区炼钢-中板产线整体采用紧凑式排布,普碳和低合金产品均采用热送热装工艺。热送热装工艺具有降低加热炉燃耗、缩短产品生产周期、提高加热炉产量、减少钢坯氧化烧损、减少仓库面积、降低运输费用等诸多益处。为了提高铸坯热送热装温度,减少加热炉燃耗,对邯钢新区板一连铸的二冷水进行了优化。在连铸1.1 m/min的拉速下,通过均匀减少各二冷区水量,将低合金钢冷却比水量由0.71 L/kg减少到0.45 L/kg,铸坯出扇形段的表面平均温度由1050℃提高到1130℃,铸坯装炉表面平均温度由870℃提高到930℃;优化后的各区水流密度W与各区中点到结晶器弯月面的距离L拟合曲线为W=2.7673 L^(-1.186),即W与L的1.186次方满足反比关系。The steelmaking-medium plate production line of HBIS Group Hansteel Nengjia New Area adopts compact arrangement,and the common carbon and low alloy products adopt hot deliver and hot charging process.The hot deliver and hot charging process has many advantages,such as reducing the heating consumption of the furnace,shortening the production cycle of the product,increasing the output of the furnace,reducing the oxidation and burning loss of the billet,reducing the warehouse area and reducing the transportation cost.In order to improve the temperature of hot deliver and hot charging of slab and reduce the fuel consumption of heating furnace,the secondary cooling water of slab continuous casting in new area of Hansteel was optimized.At the casting speed of 1.10 m/min,the cooling water ratio of low alloy steel is reduced from 0.71 L/kg to 0.45 L/kg by uniformly reducing the water volume in each secondary cooling zone.The average surface temperature of the slab is increased from 1050℃to 1130℃,and the average surface temperature of the slab is increased from 870℃to 930℃.After fitting the optimized water flow density W in each zone with the distance L from the midpoint of each zone to the meniscus of the mold,it is concluded that W=2.7673 L^(-1.186),that is,the 1.186 power of W and L satisfies the inverse relationship.

关 键 词：热装热送 二冷水 比水量 表面温度 水流密度 

分 类 号：TF777[冶金工程—钢铁冶金]