Sökning: "blast furnace"

Visar resultat 1 - 5 av 91 avhandlingar innehållade orden blast furnace.

1. 1. A model of gas injection into a blast furnace tuyere

   Författare :Per Hellberg; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; blast furnace; Tuyere; modeling; gas injection; CFD; Other materials science; Övrig teknisk materialvetenskap;

   Sammanfattning : .... LÄS MER

3. 2. Bio-coal as an alternative reducing agent in the blast furnace

   Författare :Asmaa El-Tawil; Lena Sundqvist Öqvist; Bo Björkman; Henrik Saxen; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Devolatilization; torrefied biomass; bio-coal; volatile matter; reduction; blast furnace; Process Metallurgy; Processmetallurgi;

   Sammanfattning : The steel industry is aiming to reduce CO2 emissions by different means; in the short-term, by replacing fossil coal with highly reactive carbonaceous material like bio-coal (pretreated biomass) and, in the longer term, by using hydrogen. The use of bio-coal as part of top charged briquettes also containing iron oxide has the potential to lower the thermal reserve zone temperature of the Blast furnace (BF) and, due to improved gas efficiency, thereby give a high replacement ratio to coke. LÄS MER

4. 3. A Study of the Heat Flow in the Blast Furnace Hearth Lining

   Författare :Maria Swartling; Pär G. Jönsson; Xuegong Bi; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Blast furnace; heat transfer; mathematical model; experimental; Metallurgical process and manufacturing engineering; Metallurgisk process- och produktionsteknik;

   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

5. 4. Mineral Reactions and Slag Formation During Reduction of Olivine Blast Furnace Pellets

   Författare :Elin Ryösä; Hans Annersten; Kyösti Heinänen; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; olivine; iron ore pellets; blast furnace; reduction; alkali; coating; slag formation; Earth sciences; Geovetenskap;

   Sammanfattning : The present work focuses on mineral reactions and slag formation of LKAB olivine iron ore pellets (MPBO) subjected to reducing conditions in the LKAB experimental blast furnace (EBF). The emphasis is on olivine reactions with surrounding iron oxides. Many factors influence the olivine behaviour. LÄS MER

7. 5. An Experimental and Numerical Study of the Heat Flow in the Blast Furnace Hearth

   Författare :Maria Swartling; Pär Jönsson; Henrik Saxén; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Blast furnace; hearth; heat transfer; model; experimental; numerical; Metallurgical process engineering; Metallurgisk processteknik;

   Sammanfattning : This study has focused on determining the heat flows in a production blast furnace hearth. This part of the blast furnace is exposed to high temperatures. In order to increase the campaign length of the lining an improved knowledge of heat flows are necessary. Thus, it has been studied both experimentally and numerically by heat transfer modeling. LÄS MER