The Gero Carbolite HTRV 100-250/18 is used to observe the dissolution properties of slag formers and steel scrap in liquid slag and metallic liquids, respectively. Further, the determination of liquid slag properties e.g. diffusion coefficients is possible. The maximum temperatures are 1720 °C. The heating is carried out through molybdenum disilicide (MoSi2) heating elements [...]
Increasing requirements on the properties of steel are challenging steel plant operators. Controlled cooling, as a part of most metallurgical processes, takes an important role in fulfilling these requirements. Optimal cooling strategies help to adjust mechanical properties and to minimize the formation or promotion of surface defects. But not only the steel quality is improved; [...]
Kurzbeschreibung und Problemstellung: Sytematische Untersuchung der Einflussfaktoren wie clogging, automatisches Gießspiegel Steuerungssystem, bulging, waving und Gießgeschwindigkeit auf die Gießspiegeschwankungen und deren Auswirkungen auf die Oberflaechenqualitaet der Brammen bei den Stranggussanlagen CC4, CC5, CC7 und CC8 der voestalpine Stahl Linz GmbH. Projektinhalt: Literatur Recherchieren; Quantitativ Beschreibung des Problems (Gießspiegelschwankungen) und deren Auswirkungen auf [...]
From March 25th to 28th, the 5th VDEh-Seminar on Ironmaking took place in Duisburg, Germany. Two of our PhD-researchers, Michael Zarl and Daniel Spreitzer and also one of our guest researchers, Takero Adachi, participated at those four days of lectures, teamwork tasks and a site visit to Hüttenwerke Krupp Mannesmann. One of the lecturers with the [...]
The basic development of a thermodynamic and kinetic model of the converter steelmaking was completed by the predecessor Mag.Dr.mont. Y. Lytvynyuk in Phase I and II of the K1-Met. The first test calculations with the model showed qualitatively fair results considering the time trend for the bath temperature as well as concentration of elements [...]
Kinetics of lime dissolution in model and industrial steelmaking slags has been investigated. Samples of lime in a cylinder shape of predetermined size were immersed for a fixed time in the molten slag at temperatures between 1400 – 1600°?. Considering the experimental data derived: mass of dissolved calcium oxide, linear dimensions of calcium oxide samples [...]
Coke is the major fuel as well as the costliest raw material of the Blast Furnace (BF) ironmaking process. It is not only the major reductant of the process, but it also provides strength to the burden under BF conditions. Total cost of coke is around 60% of the hot metal production and 1/3rd of [...]
Within this research field, a broad variety of either industrial scale processed or lab scale produced lump ferrous burden materials can be investigated. The description of a material’s ability regarding oxygen release and mechanical performance during reduction can be investigated either at standardized testing conditions as well as more sophisticated industrial scale processes conditions concerning [...]
Alkalis like potassium and sodium are known as harmful elements with effect on burden and coke disintegration, destruction of the refractory material and the creation of scaffolds. Because of the higher input rates caused by low quality iron ore and fuels, the aim was focused on the effect of K & Na during the iron [...]
A fluidized bed reactor in a smelting reduction process represents a high sophisticated technology which enables operators to adapt to different requirements. It is possible to reduce fine iron ores without the energy-intensive process of sintering. The aim of this study is to determine the of ultra fine iron ore (< 63 µm) on a circulating fluidized [...]
