Novotroitsk branch of the National University of Science and Technology “MISiS”, Novotroitsk, Russia:

D. R. Ganin, Cand. Eng., Associate Prof., Dept. of Metallurgical Technologies and Equipment, e-mail: dmrgan@mail.ru

Ural Steel, Novotroitsk, Russia:
A. Yu. Fuks, Chief Specialist for Sintering and Blast Furnace Production, Technical Directorate

The aim of the study was to establish the relationship between the gas blowing parameters of a blast furnace (BF) and the quality indicators of coke CRI, CSR and to develop recommendations on the use of measures to increase CSR and reduce CRI in order to increase BF productivity and reduce coke specific consumption. For an objective study, BF No. 1 was chosen with a useful volume of 1007 m³, which worked during the study period with consistently high technical and economic indicators. The results of the analysis of data on the effect on the gas-blast parameters (flow rate and blast pressure) of blast furnace No. 1 of the values of coke reactivity CRI and coke hot strength CSR over a three-year period are presented. Research has revealed that the CRI and CSR values of the coke used at the enterprise do not correspond to the recommended values. A relationship has been established between the gas blowing parameters of a blast furnace and the indices of coke reactivity CRI and hot strength of coke CSR. Measures are proposed to improve coke CRI (decrease) and CSR (increase) in the conditions of Ural Steel JSC, the implementation of which will increase the productivity of blast furnaces and reduce the specific consumption of coke.

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