针对莱钢2号1880m3高炉炉役后期生产特点,2013—2015年逐步采用了加长风口、优化布料制度和球团、生矿及焦丁平铺的技术措施,达到了稳定炉况、优化指标的目的.实际生产结果表明,加长风口长度有利于活跃炉缸中心,但需要上下部制度的配合;焦丁平铺后布在靠近炉墙位置,有利于改善边缘矿层的透气性,改善边缘矿石的还原,促进边缘气流的稳定和炉体软水水温差的稳定,有利于降低炉体热量损失,进而有利于降低高炉消耗.
Based on the operation features of No.21880m3 BF at the later stage of campaign in Laiwu Steel,technical measures are carried out,such as increasing tuyere length,optimizing the burden distribution rules,and controlling pel-let,raw ore and coke nut blending rules. Then the goals that BF operation is smooth and stable,and optimization index gets improved are realized. The actual production shows that increasing the length of tuyere is beneficial for making ac-tive hearth center,and the coordination of the upper and lower system should be concerned at the same time.After the nut coke is tiled closely to the position of the furnace wall,the permeability and reducibility of the peripheral ore layer will be improved. The stability of peripheral gas flow and water temperature difference of cooling stave will also be pro-moted. It is advantageous to reduce the heat loss of the furnace body,which is beneficial to reduce the consumption of blast furnace.
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