Bottom-blowing, as widely adopted in electric arc furnace (EAF) steelmaking technology, stir the molten bath by blowing inert gas (Ar, N2) from the bottom of EAF to promote fluid flow and uneven metallurgical reaction in the molten bath. However, for eccentric structure design of electric arc furnace, the problem still exists in EBT(Eccentric Bottom Tapping)area. In this study, by the analysis ...

A water model with a low temperature (-170 ) gas blow °C -in system was established to simulate the phenolmena inside a steelmaking furnace, to investigate the effects of gas bottom blowing conditions on the shape and dimensions of the mushroom formation, sitting on the gas tuyeres. It was observed that ice mushroom formations in the shape of cones with hollow channels for gas flow through were...

In this paper a novel route planning system for steel coils that must pass through different processing steps of a generic steelmaking plant will be presented. Production times and costs are often the only considered indicators by traditional planning systems, while, with this newly proposed approach, customers’ quality requirements are also taken into account. In facts, in medium/large steelma...

Hydrogen direct reduction is one of the technological process solutions for making steel, explored in framework reducing GHG emissions from steel sector (Net-Zero steel). However, there are many other solutions, which have been since 1980s or earlier. The present paper starts by comparing all these different options terms 3 criteria: energy needs, and total production cost steel. extensive simu...

The energy system in a modern integrated steel plant is a complicated network of units exchanging energy and matter with each other. System studies using process integration tools are important to avoid sub-optimization. At the steel plant in Luleå such studies have been carried out using a MILP-based mathematical programming tool (reMIND), mainly because of its inherent flexibility for handlin...

A sediment sampling based on a two-dimensional mapping was performed in the harbour of Trieste (northern Adriatic Sea), considering 28 sites exposed to pollutant inputs from harbour and industrial activities. Polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) were determined in surface sediments, because these very persistent pollutants seem to be responsible for the d...

Due to increased competition in a world economy, steel companies are currently interested in developing techniques that will allow for the improvement of the steelmaking process, either by increasing output efficiency or by improving the quality of their product, or both. Slag foaming is one practice that has been shown to contribute to both these goals. This paper describes an effort in progre...

Characteristics of flow field and stirring ability of coherent jet with various shrouding CH4 flow rates on the molten bath were studied by combustion experiment and numerical simulation. The axial velocity and total temperature distributions of coherent jet under hot (1700 K) and cold (298 K) ambient condition were analyzed. The Eddy Dissipation Concept model was used in simulation with detail...

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