Projektmenu

Introduction

K1-MET Research Area 1 has its focus on input material characterisation of metallurgical production processes as well as on handling of residual and recycling materials such as slags, dusts, and sludges.

Further, Area 1 research activities concentrate on the development of innovative cleaning technologies for metallurgical process gases and on the integration of these dust removal and residual treatment routes into the iron and steel process chain.

Contact person

Johannes Rieger
Management Area 1

 +43 3842 402 2280

Objectives and Motivation

  • Efficient raw materials and reducing agent utilization
  • Sustainable metallurgical residual treatment and recycling for a closure of material cycles
  • Development of dry-based gas cleaning solutions for metallurgical processes
  • Process development and implemenation from lab scale to large industrial scale 

Our targets

Quantification of emission formation during the sintering process should be investigated with the focus on the impact of specific sintering operating conditions. Based on these findings specific emission control should be developed and implemented (e.g. waste gas recirculation, gas sintering using gaseous fuels for a partial coke breeze substitution). Furthermore an identification of sinter composition (characterization of iron ore and mineral phases) will be explored by means of microscopic image analysis e.g. to quantify the influence of sinter cooling conditions on sinter quality.

A concept composed of suitable methods for a characterization of fine coals should be developed. These coal types will be used as auxiliary reducing agent in the blast furnace (PCI = Pulverized Coal Injection). Among others Thermogravimetric Analysis (TGA) represents an approved method for analysis of possible PCI coals.

Physico-chemical and thermal modification processes of steelmaking slags should be set up. In combination with subsequent mineral processing routes valuable materials e.g. iron can be separated from the slags for an internal steel plant recycling (blast furnace, sintering plant). Furthermore it is a goal to create new saleable products e.g. for the construction industry.

The RecoDust process should be further developed for a treatment of metallurgical residuals with the focus of zinc recovery. Beside this concepts for agglomeration of raw materials (fine coals) and metallurgical residual streams (filter dusts and sludge’s) should be created. In this context material strength and reducibility analysis are important for a utilization of the agglomerated coal briquettes in a coking plant and moreover briquetted residuals can be recycled in direct reduction plants e.g. FINEX® respectively.

Dry gas cleaning technologies should be implemented for metallurgical processes such as the blast furnace and the steelmaking (Basic Oxygen Furnace, BOF) process. Pilot plant and large scale industrial campaigns are planned to replace existing wet scrubbing gas systems