重钢2500m^3高炉低强度冶炼操作实践

Low strength smelting operational practice of 2500m^3 blast furnace in CISC

重钢在2015～2016年间，由于原材料条件限制，强度经常在0．5～0．8t/m^3·d之间快速转变。主要通过下部堵风口结合加陶瓷套缩小风口面积改变送风制度，中部调节冷却壁回用冷却水流量来调节冷却强度，上部改变装料制度，适当加中焦等措施，使高炉稳定顺行，炉缸活跃，小套烧坏数量少，煤气利用在45±2％，综合焦比在510Kg／t·Fe。

The unstable value of steel strength manufactured by CISC changed fast between 0.5-0.8t/m^3 for the not qualified raw material during the year of 2015～2016. Faced this problem the bottom tuyere was plugged and its diameter was reduced with pocelain to change the blast system, in the middle of furancethe cooling level was controlled through the flow capacity of recycling water which came from the cooling wall, also the middle energizer carbon was adopted, at last the blast furnace run stable, and its basin was also active, the ulitization ratio of gas was about 45 ± 2%, comorehensive coke ratio was 510 Kg/t · Fe.