Kuznetsov O. The increase of the blast-furnace efficiency at the expense of the optimization of the process and the pulverized coal use

Object of research - blast melting technology with application of combined blast. Purpose of research - increase of combined blast use effectiveness and coke consumption reduction. Methods of research - experiment planning and mathematical statistics methods, laboratory researches, industrial experimental melting, financial thermal balances compiling. Practical value - the program for blast melting technology optimization. In a blast furnace plant of Open Joint Stock Society "EMP" the technology for forge high drainage capacity support by periodic (in a course of an iron tapping) reduction of natural gas consumption at 50-80 of % is used. Scientific novelty - the conception about the extreme nature of a degree of direct ferric oxide recovery dependence has received further development that creates the prerequisites for its recovery process optimization. For the estimation of computation technological modes capability realization with application of pulverized coal the determining integrated parametersare offered for the first time. The conception about the coke mouthpiece littering degree influence on the mass of melt held back in it has received further development. A possibility of increase of combined blast use effectiveness and coke consumption reduction at 23.8-36.6 % in conditions of a blast furnace shop in Ukraine is justified for the first time. The results are applied in the Open Joint Stock Society "EMP" blast furnace shop. Application sphere - blast furnace shops at the metallurgical plants.