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Visar resultat 1 - 5 av 6 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Top Gas Blowing Technique to Prevent Slopping in Ladle and Basic Oxygen Steelmaking Process

    Master-uppsats, KTH/Materialvetenskap

    Författare :Abdullah Harazeen; [2022]
    Nyckelord :slag; slag foaming; slopping prevention; BOS; LD converter; ladle furnace; foaming index; and cold model experiment;

    Sammanfattning : In the steel industry, slag foaming plays a crucial role in many steel processes, given its positive impact on the thermal efficiency of the furnace and its life span. However, excessive foaming causes an overflow in the converter known as “slopping”. LÄS MER

  3. 2. Anaerobic Co-digestion of steam pretreated wheat straw and sewage sludge

    Master-uppsats, Lunds universitet/Bioteknik (master); Lunds universitet/Bioteknik (CI)

    Författare :Virginia Tosi; [2021]
    Nyckelord :Anaerobic co-digestion; wheat straw pretreatment; nutrients availability; OLR; VFA acumulation; Biotechnology; Technology and Engineering;

    Sammanfattning : Anaerobic digestion (AD) of wastes and residues is a widely applied and explored process. However, when the process is not optimized, inadequate concentrations of nutrients and inhibitory compounds are common and can lead to low maximum organic loading rates and increased risk of process problems, low organic dry solids degradation rate and reduced methane yields. LÄS MER

  4. 3. Usage of Natural Gas in Modern Steel-making : A Financial and Environmental Evaluation of Available Steel-making Technology in Sweden

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :William Wadbrant; [2020]
    Nyckelord :Direct Reduction; Iron sponge; Natural gas; LNG; DRI; Midrex; HYL; Electrical Arc Furnace; Blast furnace; Oxygen Converter; Capital expenditure; Modern Steelmaking; HYBRIT; Direkt reduktion; Järnsvamp; Naturgas; LNG; Hållbarhet; Koldioxidutsläpp; Växthusgaser; Midrex; HYL; Ljusbågsugn; Masugn; LD-Konverter; Kapital investering; Modern Ståltillverkning; HYBRIT;

    Sammanfattning : A method of producing steel that is not used in Sweden today is direct reduction using natural gas, a method which could has enormous potential in the future of steelmaking. Historically, steelmaking prioritized productivity and profitability. LÄS MER

  5. 4. The transfer of knowledge for renewable energy policy-making                   between Europe and Peru in the period 2006-2009 : Impacts in the Peruvian Solar Photovoltaic innovation system

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Aina Bruno; [2018]
    Nyckelord :climate policy; renewable energies; policy transfer; solar photovoltaic; innovation systems;

    Sammanfattning : Energy generation and use is one of the main contributors to climate change, as it is responsible for two thirds of the global greenhouse gas emissions (IEA 2015). In this context, renewable energies (RE) are increasingly gaining momentum as a key driver for the transition towards a low-carbon society (REN21 2016) and a source of technological and social innovation. LÄS MER

  7. 5. Optimisation of the bottom stirring praxis in a LD-LBE converter : Investigations and tests on phosphorous removal, nitrogen as stirring gas, and slopping

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Oorganisk kemi

    Författare :José Aguirre Castillo; [2015]
    Nyckelord :LD; BOS; Bottom Stirring; Phosphorous; Steel making; Nitrogen;

    Sammanfattning : The LD-process, called after the cities Linz and Donawitz, is used to convert pig iron into crude steel by blowing oxygen on top of the pig iron. A LD-LBE converter, Lance Bubbling Equilibrium, also stirs the melt trough a bottom stirring system. LÄS MER