Practice of Increasing Production and Reducing Cost in Shasteel No.2 BF
Due to shortage of coal resources from Australia,the proportion of non-mainstream ore charged to Shasteel No.2 BF raises.A concept of"Reinforce Stock Column Skeleton,Stabilize the Slag System,and Optimize the Gas Flow Distribu-tion"is proposed under this background.The action of reinforcing the stock column skeleton is executed based on the test re-sult of a 40 kg coke oven in the laboratory by using the domestic class A coking coal to replace Australian coal for coal mix optimization,so as to keep the coke M40 and CSR index qualified.The work of BF slag system stabilization focuses on the de-velopment of raw material blending accuracy system of the sinter,stabilization of the sinter alkalinity,and finding of the four-step control rule of Mg/Al ratio that is suitable for the actual production of the furnace,and optimization of the slag viscosi-ty.Optimization of the gas flow distribution is achieved by due adjustment of the stock distribution matrix after increasing the blasting flowrate and narrowing the tuyere area.The production practice of Shasteel No.2 BF shows that the above concept is feasible.The furnace realizes production increase and consumption reduction at low cost.
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