沙钢3号高炉经济高效低钛护炉实践

Practice of Economical Efficient and Low-Ti Furnace Protection in Shagang No.3 BF

针对沙钢3号高炉炉缸侧壁温度持续升高现象,提出了经济高效低钛护炉方案。经济高效低钛护炉,就是以析出石墨碳为核心,提高铁水[C]含量,降低铁水中碳不饱和度,改善炉缸活性,促进炉缸石墨碳析出。3号高炉低钛护炉期间,逐步减少钒钛矿使用量,铁水[Ti]降低至0.08%以下,炉缸侧壁炭砖温度基本处于400℃以下。同时,高炉日产量达到6500t/d以上,燃料比和焦比分别降低至519kg/t和375kg/t,大幅降低了燃料消耗,实现经济、高效、低钛护炉的目标。

An economical efficient and low-titanium furnace protection solution is proposed in view of continuous abnormal increase of the hearth side wall temperature of Shagang No.3 BF.Taking the high segregation of graphite carbon as the core approach,this solution aims at increasing the[C]content in hot metal,reducing unsaturation level of carbon in the hot metal,and enhancing the hearth activity so as to promote the segregation of graphitic carbon in the hearth.By gradually reducing the amount of vanadium-titanium ore used during the furnace protection operation,the[Ti]content drops down to below 0.08% and the temperature of the carbon bricks on the hearth sidewall keeps below 400℃.Thanks to this solution,the furnace daily output reaches over 6500t/d,and the fuel rate and coke rate decline to 519kg/t and 375kg/t,respectively,greatly reducing fuel consumption and fulfilling the goal of economical,efficient,and low-titanium furnace protection.