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Abstract Based on the operation features of No.2 1 880 m3 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 pellet， 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 active 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 promoted. 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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Received: 18 September 2016
Published: 09 June 2017
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2017, Vol. 52 
