Sökning: "steelmaking"

Visar resultat 21 - 25 av 77 avhandlingar innehållade ordet steelmaking.

  1. 21. Recycling of metallurgical by-products within integrated iron and steelmaking : experimental studies of cold bonded by-product pellets

    Författare :Ryan Robinson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Sammanfattning : In recent years as costs for depositing dust and sludge generated in the iron and steel making industry have increased, due to lack of space and increasing environmental restrictions, the need to recycle these solid by- products to avoid depositing costs and to recover valuable metal fractions, is soon becoming a necessary reality. Cold bonded agglomeration is considered to be a well-suited alternative for recycling of steel industry by-product dust and sludge. LÄS MER

  3. 22. Modelling Approaches of Multiphase Phenomena Focusing on an Integrated Steelmaking Route

    Författare :Reza Safavi Nick; Pär Jönsson; Björn Glaser; Dong-Yuan Sheng; Stein Tore Johansen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : Improvements in numerical methods and developments of computer hardware brought attention to the modelling of metallurgical processes. This has been a critical step in understanding in-furnace conditions throughout the ironmaking and steelmaking process since it is, if not impossible, extremely difficult to conduct measurements during the process. LÄS MER

  4. 23. A Study of EAF Austenitic and Duplex Stainless Steelmaking Slags Characteristics

    Författare :Saman Mostafaee; Margareta Andersson; Pär Jönsson; Nzotta Mselly; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; EAF; Slag; Duplex steel; 304L stainless steel; Characterization; Microstructural evolution; Spinels; Basicity; Computational thermodynamics; Slag foaming; Metallurgical process and manufacturing engineering; Metallurgisk process- och produktionsteknik;

    Sammanfattning : The high temperature microstructure of the solid phases within the electric arc furnace (EAF) slag has a large effect on the process features such as foamability of the slag, chromium recovery, consumption of the ferroalloys and the wear rate of the refractory. The knowledge of the microstructural and compositional evolution of the slag phases during the EAF process stages is necessary for a good slag praxis. LÄS MER

  5. 24. Application of Wastes from Pulp and Paper Industries for Steelmaking Processes

    Författare :Tova Jarnerud; Andrey Karasev; Pär Jönsson; Carl-Erik Grip; KTH; []
    Nyckelord :Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Over the past several years, considerable efforts have been made to develop a more circular economy. The ambition to reuse, remanu­facture and recycle materials is of great significance for the establish­ment of a sustainable society. LÄS MER

  7. 25. Abatement of Chromium Emissions from Steelmaking Slags - Cr Stabilization by Phase Separation

    Författare :Galina Albertsson; Lidong Teng; Seshadri Seetharaman; Voicu Brabie; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spinel; slag basicity; oxygen partial pressure; chromium oxide vaporization; шпинель; шлак; парциальное давление кислорода; испарение оксидa хрома; 尖晶石; 炉渣碱度; 氧分压; 铬氧化物汽化; spinell; slaggbasicitet; syrepartialtryck; förångning av kromoxid;

    Sammanfattning : Chromium is an important alloying element in stainless steel but also environmentally harmful element. A number of mineralogical phases present in the slag matrix can contain chromium and lead to chromium leaching. LÄS MER