Since 2023,ore prices have been rising,and the cost of furnace materials has become an important factor restricting the reduction of pig iron costs.Laisteel has taken measures to increase the slag ratio to reduce the cost of furnace materials,but the increase in slag ratio brings problems such as a decrease in permeability index and an increase in fuel ratio.Taking the 3 200 m3 blast furnace of Laigang as an example,measures such as optimizing the charging system,air supply system,and slag system were taken to improve the slag ratio and achieve better smelting results,further expanding the material selection channels and reducing smelting costs.
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