EFFECT OF THE QUALITY OF THE IRON-ORE-BEARING RAW MATERIALS AND COKE ON THE PERFORMANCE INDICES OF BLAST FURNACES AT THE NOVOLIPETSK METALLURGICAL COMBINE

摘要

Results are presented from an evaluation of the effect of the quality of the iron-ore-bearing raw materials and coke on the performance of blast furnaces at the Novolipetsk Metallurgical Combine. It is shown that the technical-economic indices of the smelting operation are improved by increasing the pellet content of the charge, the basicity of the sinter, and the sinter’s content of the –5 mm fraction. An analysis of the performance of the blast furnaces on coke with a hot-strength index CSR = 40–60% confirmed the qualitative and quantitative effect of this index on furnace productivity and coke consumption. The analysis also showed that the magnitude of this effect depends on smelting rate and the basicity of the furnace slag.