FIELD: reduction process in converter cyclone furnace used in production of pig iron. SUBSTANCE: method includes measurement of fraction of carbon C in exit gas in form of CO and CO2; measurement of fraction of hydrogen H2 in exit gas in form of H2 and H2O; determination of C/H2 ratio in exit gas; comparison of C/H2 ratio determined by said method in exit gas with C/H2 ratio prevailing for supplied coal; regulation of coal supply on the basis of difference found between C/H2 ratios in exit gas and in supplied coal. EFFECT: provided possibility of control of reduction process. 6 cl, 2 dwg, 1 ex
