Sökning: "Pär G. Jönsson"
Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Pär G. Jönsson.
1. Influence of Ladle-slag Additions on BOF-Process Parameters
Sammanfattning : The influence of ladle-slag additions on the BOF-process performance were investigated in plant trials. The aim of the study was to recycle ladle slag from secondary steelmaking to the LD-converter to save lime and improve the slag formation. LÄS MER
2. A Study of the Heat Flow in the Blast Furnace Hearth Lining
Sammanfattning : The aim of the present thesis was to study the heat flows in the blast furnace hearth lining by experimental measurements and numerical modeling. Thermocouple data from an operating furnace have been used throughout the work, to verify results and to develop methodologies to use the results in further studies. LÄS MER
3. Development of Graphitic Carbon Nitride based Semiconductor Photocatalysts for Organic Pollutant Degradation
Sammanfattning : As a potential solution to the global energy and environmental pollution, design and synthesis of artificial photocatalysts with high activities have attracted increasing scientific interests worldwide. In recent years, the graphitic carbon nitride (g-C3N4) has shown new possible applications in the photocatalytic field due to its unique properties. LÄS MER
4. Evaluation of Non-Metallic Inclusions after Deformation and Their Effect on the Machinability of Steel
Sammanfattning : The presence of non-metallic inclusions (NMIs) have critical effects on both the mechanical properties and machinability of steels. In the present thesis, one focus is to study the characteristics of deformed sulfides (MnS) for a stainless steel (3R65) and a tool steel (42CrMo4). LÄS MER
5. A study of an autogenous slag for steel production with consideration of possible vanadium extraction
Sammanfattning : The thesis discusses the use of the autogenous slag that forms from the residual oxides present in hydrogen reduced iron (H-DRI) pellets during melting. The studies are motivated by a better understanding of how H-DRI affect the steelmaking operations. LÄS MER