According to application of gas supply system of bottom blowing for 120 t converter at Angang Steel

the BOF bottom blowing control model has been established by PID control arithmetic method to realize the rapid

accurate and stable control of gas flow in gas supply pipeline

and meet the requirements of the production process

which could keep the bottom blowing element under stable ; good shape and air permeability and not easy been blocked during the converter service period. With the bottom blowing control model

equipment and technology optimized

the end-point [%C] • [%O] is reduced from 0.00316 to 0.00273

the end-point T. Fe content in slag is reduced by 1.69%

the economic benefit of a ton steel is 12.2 yuan /t to achieve the effect of improving quality and reducing cost.