Search for dissertations about: "thesis coal and coke for blast furnace"

Showing result 1 - 5 of 12 swedish dissertations containing the words thesis coal and coke for blast furnace.

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

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

    Abstract : 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. READ MORE

  4. 2. Influence of the properties of bio-coal as a substitute for fossil coal in carbon composite agglomerates and in coke

    Author : Asmaa El-Tawil; Lena Sundqvist Ökvist; Bo Björkman; Timo Fabritius; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bio-coal; devolatilization; bio-agglomerates; bio-coke; Centrumbildning - Centrum för avancerad gruvteknik och metallurgi CAMM ; Centre - Centre for Advanced Mining Metallurgy CAMM ; Process Metallurgy; Processmetallurgi;

    Abstract : The iron-ore-based blast furnace (BF) process is still the most dominant method for producing metallic iron units for steelmaking, and the BF is also the main contributor to the 7-9% of global CO2 emissions which, according to World Steel Association, originate from the steel industry.  The steel industry is aiming to reduce CO2 emissions by different means. READ MORE

  5. 3. Blast furnace coke properties and the influence on off-gas dust

    Author : Maria Lundgren; Bo Lindblom; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Abstract : In blast furnace ironmaking, efforts are made to decrease the coke consumption mainly by increasing the pulverized coal injection rate. This will cause changes in in-furnace reduction conditions, burden distribution and demands on raw material strength, etc. READ MORE

  6. 4. Interaction between pellet properties and blast furnace operation

    Author : Ulrika Leimalm; Gabriella Tranell; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Abstract : The raw material properties of iron-bearing material and coke have a significant impact on the blast furnace (BF) process. The raw materials are designed and chosen to achieve smooth BF operation but the operational parameters can be simultaneously modified to meet properties of selected raw materials. As the pre-set process conditions change, e. READ MORE

  7. 5. Co-injection of basic fluxes or BF flue dust with PC into a BF charged with 100% pellets : effects on slag formation and coal combustion

    Author : Lena Sundqvist Ökvist; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Abstract : Based on 100% pellets operation at BF No. 3 at SSAB Tunnplåt in Luleå a new pellet with CaO/SiO2=1 was developed during early nineties. The pellet showed good results in metallurgical laboratory test but caused slag formation problems in the bosh. READ MORE