Search for dissertations about: "reduction iron ore"

Showing result 16 - 20 of 48 swedish dissertations containing the words reduction iron ore.

  2. 16. Influence of green pellet properties on pelletizing of magnetite iron ore

    Author : Seija Forsmo; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Abstract : Magnetite iron ore green pellets are produced by balling moist concentrates to green pellets, which are then dried, oxidized to hematite, sintered, cooled and transported to steelmaking plants. The existing theory for balling is based on the capillary theory, but its applicability under industrial balling conditions is unclear. READ MORE

  4. 17. Properties of oxygen carriers based on natural and waste materials at high degrees of reduction

    Author : Victor Purnomo; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high reduction; defluidization; chemical-looping gasification; oxygen carrier; reactivity;

    Abstract : Oxygen carriers play an important role in multiple energy conversion processes, such as chemical-looping technology and oxygen-carrier-aided combustion. This thesis particularly explores how a high reduction degree of an oxygen carrier can affect its performance. READ MORE

  5. 18. CFD-modelling of the SNCR process in iron ore grate-kiln plants

    Author : Per E.C. Burström; Henrik Wiinikka; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Abstract : LKAB (Luossavaara-Kiirunavaara AB) is an international company that producesiron ore products for the steel industry; their main product is iron ore pellets.The aim with this research project is to numerically investigate if it is possible to use selective non-catalytic reduction (SNCR) technologies in grate-kiln pelletizingplants for NOx reduction. READ MORE

  6. 19. Degradation mechanisms in refractory lining materials of rotary kilns for iron ore pellet production

    Author : Jesper Stjernberg; Marc Huger; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materialteknik; Engineering Materials;

    Abstract : Iron is one of the most important resources in the lithosphere; 90% of all metal ores extracted are based on iron. Many steps are included in the extraction of iron from ore, with extraction processes varying among different producers. Iron ore pellets are a prepared burden material for ironmaking in the blast furnace or by direct reduction. READ MORE

  7. 20. The low-carbon steel industry - Interactions between the hydrogen direct reduction of steel and the electricity system

    Author : Alla Toktarova; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Renewable Energy; Energy systems modelling; Hydrogen-direct reduction; Steel industry; Electrification;

    Abstract : The European steel industry must achieve deep reductions in CO2 emissions to meet the targets set out in the Paris Agreement. Options for reducing CO2 emissions include electrification, carbon capture and storage (CCS) and the use of biomass. READ MORE