REDUCING FUEL RATIO OF XINYU 2 500 m3 BLAST FURNACE BASED ON RIESTER OPERATION LINE
In order to achieve energy conservation and consumption reduction of Xinyu No.10 blast furnace,the Rist operating line is drawn.By comparing the actual operating line with the ideal operating line,the influence of gas utilization rate and hot air temperature on coke ratio is calculated to guide production.Based on the correspondence between blast furnace smelting intensity and fuel ratio,determine the optimal smelting intensity,and gradually expand the tuyere area and increase the air volume appropriately to achieve the lowest point of fuel consumption;At the same time,gradually increase the number of ore rings in the outer and middle areas,expand the overall coke angle,reduce the ore distribution platform,and appropriately increase the ore batch weight according to the distribution of gas,developing two streams of airflow at the edge and center.By optimizing the air supply system and loading system,the utilization rate of blast furnace gas has increased by 1.55％.In addition,the hot blast stove preheater was replaced and the hot blast stove undisturbed replacement technology was used to further improve and stabilize the air temperature.The hot blast temperature increased from 1 184 ℃ to 1 204 ℃,and the final fuel ratio of the blast furnace decreased to 502 kg/t,which is at a leading level in the same industry.
Rist operation lineideal operation linegas utilization rateair supply systemfuel ratio
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