METHOD OF CONTROLLING PURGE PROCESS OF CONVERTER MELTING WITH USE OF WASTE GAS INFORMATION Russian patent published in 2018 - IPC C21C5/30 

FIELD: metallurgy.

SUBSTANCE: in the final purge step, when the amount of injected oxygen becomes greater than 85% of the designed value, the amount of removed carbon from the converter metal becomes greater than 85% of the total carbon removed, and CO content of the waste gases is equal to or less than the CO₂ content, calculation of carbon content in steel is carried out every single moment by mathematical dependence C_CT2=0.063244165+0.00001273X₁+0.0000159X₂-0.000769477X₃, where X₁ - CO₂ content of waste gases, X₂ - content of CO in waste gases, X₃ - the time from the moment when the content of CO≤CO₂ until the purge is completed, and the purge is stopped if the actual carbon content in the converter steel deviates from the set carbon content value below 0.005%.

EFFECT: use of the invention makes it possible to increase the quality of the steel produced in the result of converter smelting.

3 dwg, 2 tbl