Conveners
Slag Optimization & Process Control
- Klaus Krüger (Ingenieurbüro Klaus Krüger)
Slag Optimization & Process Control
- Mauro Bianchi Ferri (Acciarium)
Description
2.2.5
It is well known that global CO2 emission from steel sector is 7-8%, which is approx. 1/3 of industrial energy use. Hence, many steel companies are trying to develop the electric arc furnace (EAF) and/or electric smelting furnace (ESF) steelmaking processes instead of blast furnace (BF) and basic oxygen furnace (BOF) integrated routes by employing high amounts of direct-reduced iron (DRI)...
The majority of core pyrometallurgical processes rely on redox reactions, i.e. chemical reactions that involve electron transfer. Such reactions occur, for instance, when molten metals are reduced from their oxidic precursors or, in general, when elements transition between the metal and slag phases. To gain a comprehensive understanding of these processes and for exploring potential redesign...
The growing trend in today’s steel-making industry is enhancing scalability with the goal of net zero emission. This requires increased cost and process efficiency while reducing carbon emissions. To run a sustainable process, tighter control of process parameters along with close loop monitoring of liquid bath and slag plays an invaluable role. However, in terms of slag analysis, due to a...
The successful implementation of switching from lime to dololime fines injection in an electric arc furnace owned by the company United Steel in Kuwait is here discussed from technical and economical points of view. This need arises from the generation of excessive dololime fines (particles less than 10 mm) and insufficient lime fines (particles between 5-15 mm) at the lime and dololime plant...
In the modern steel production it is important to have an integrated view of the production processes and plants including performances optimization, maintenance conditions, and reduction of environmental impacts through reduction of residual wastes and CO2 emissions from the production.
In particular to consider the slags coming from the production processed of EAF and LF is a relevant point...
Achieving the climate neutrality by 2050 is the main goal of the European Green Deal, which fosters decarbonization of CO2-intensive industries, including steelworks. Deep transformations are ongoing to improve sustainability of steel production. Moreover, emerging markets and countries significantly affect availability and quality of raw materials. Therefore, steelmaking process changes and...
Slag foaming is a very important phenomena in the operation of the Electric Arc Furnace due to multiple benefits. It has been extensively investigated from an academic view point, however there are still many unresolved issues dealing with the real conditions that promote these phenomena. I many of the previous investigations the gas is artificially injected, rather than created at the...