Abstract

The results of the full-scale testing of the Extruded Briquettes (BREX) as the charge components of the industrial Midrex reactor are discussed. The influence of the type of binder on the degree of metallization of BREX is analyzed. Magnesium sulfate-based binder helps to reach highest metallization degree of BREX. Mineralogical study shows the difference in the iron-silicate phase’s development as well as in the porosity change during metallization depending on the binder used.

Highlights

  • The process of mini steel mills using oxidized pellets as a feedstock includes production of metallized pellets, which are used further for the production of direct reduction iron (DRI), production of steel in electric arc furnaces (EAF) and its continuous casting and rolling

  • Pellets fines and DRI sludge are usually dumped in piles and EAF dust and mill scale are sold to a third-party

  • The main aims of the present study are: (a) to develop cost-effective procedure for recycling of the oxide materials, wastes of DRI production and EAF dusts, in order to improve the environmental situation in the enterprise; (b) to choose the efficient binder which will allow to achieve the highest degrees of briquettes metallization

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Summary

Introduction

The process of mini steel mills using oxidized pellets as a feedstock includes production of metallized pellets, which are used further for the production of direct reduction iron (DRI), production of steel in electric arc furnaces (EAF) and its continuous casting and rolling. Such companies are importing annually large amounts of the iron ore pellets for DRI production and during the transportation, stockpiling, charging of the pellets to the metallization reactors and discharging of the metallized pellets dozens of thousand tons of fine iron-containing materials are being generated. We have studied the possibility to apply Stiff Vacuum Extrusion (SVE) for agglomeration of the natural and anthropogenic fine materials generated during ironmaking and

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