Development of Technology for the Production of Iron Ore Monoraw for Blast Furnace Smelting

Abstract

The aim of the work is to develop and test technological regimes for obtaining new types of shelled iron ore materials and mono-raw materials for blast furnace smelting. It is shown that the traditional ways to improve the technology of blast furnace smelting to increase the productivity of the furnace and reduce the specific consumption of coke have largely exhausted their potential. At the same time, the creation of pelleted iron ore mono-raw material with the necessary indicators of the complex of metallurgical characteristics provides additional opportunities to reduce energy costs during blast furnace smelting. The article presents the results of the developed technology for the production of pelleted iron ore monoprocess for blast furnace smelting, which has at the same time a high content of iron and residual carbon. The authors developed new types of iron ore raw materials - fluxed local spikes from iron ore concentrates of different degrees of enrichment, local spikes with increased compared to agglomerate and pellets, iron content and local spikes with high residual carbon content. To obtain local heat, as a high-temperature part of the charge, metallized rolls, metallized ores or mixtures thereof were used. It is shown that the proposed mono-raw material can be produced in existing shops for the production of fired rolls, and can significantly improve the technical and economic performance of pig iron smelting. The components of the charge were mixed, after which the mixture was subjected to heat treatment with a gaseous coolant with oxidizing or weakly oxidizing potential. The specific productivity of the combustion unit and the specific costs of energy resources (heat and electricity) in the production of scuffed mono-raw materials remained almost identical for the production of other local heat. The results of the calculation of blast furnace smelting indices when using in its charge flaked fluxed mono-raw material with high iron and carbon content are presented. Calculations show that the use of this material in blast furnace production will significantly improve the technical and economic performance of pig iron smelting.