Research on Measures to Increase the Proportion of Lump Ore in Blast Furnace
The practice of increasing the propotion of ore blocks in a blast furnace is carried out.Measures such as drying and controlling the amount of material discharged from the vibrating screen are taken to strengthen the screening of block ore and reduce the amount of powder entering the furnace.By adjusting the loading system,air supply system,and slag making system,we can improve the discharge of slag and iron.Under the condition of a coal ratio of over 160 kg/t,increase the proportion of lump ore entering the furnace to 17％～20％.after taking relative measures,reasonable permeability and pressure difference inside the blast furnace ensure smooth flow and reasonable distribution of blast furnace gas,reduce slag viscosity,achieve stable production of the blast furnace,and reduce the cost of molten iron by more than 30 yuan/ton.
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