• A Method for Assessment of Recyclability of Aluminum from Incinerated Household Waste 

      Gökelma, Mertol; Meling, Ingrid; Soylu, Ece; Kvithyld, Anne; Tranell, Gabriella (Journal article; Peer reviewed, 2019)
      Aluminum is widely used in daily household consumable goods such as food and drink packaging materials, storage containers, etc. The disposal of such goods into household waste means that this waste stream contains a ...
    • Characterization of inclusion content in mechanical aluminium filters 

      Eriksen, Ulrik Aalborg; Johansen, Inge; Syvertsen, Martin; Kvithyld, Anne; Bao, Sarina (Research report, 2019)
    • Coalescence of Clean, Coated, and Decoated Aluminum for Various Salts, and Salt–Scrap Ratios 

      Capuzzi, Stefano; Kvithyld, Anne; Timelli, Giulio; Nordmark, Arne; Gumbmann, Eva Maria; Engh, Thorvald Abel (Journal article, 2018)
      In a rotary furnace for aluminum recycling and dross treatment, a salt flux covers the molten metal to prevent new oxidation and to capture oxides, and impurities contained in the scrap. Furthermore, the salt must promote ...
    • Collection of aluminium packaging today 

      Bækken, Idun; Bao, Sarina; Kvithyld, Anne (Research report, 2019)
      This report investigates the collection of aluminium packaging, particularly in China, the United States and the European Union. A literature search among journal articles using Google Scholar, company and organization ...
    • Degreasing of aluminum turnings and implications for solid state recycling 

      Cui, Jirang; Kvithyld, Anne; Roven, Hans Jørgen (Chapter, 2010)
      With the global warming being of concern, recycling of aluminum by new solid-state recycling techniques instead of conventional remelting and subsequent refining processing has been taken into account. Solid-state recycling ...
    • Discussion of bi-film index and LiMCA data in industrial aluminum remelting trials 

      Kvithyld, Anne; Sæter, Jan Anders; Syvertsen, Martin; Fossheim, Harry; Nordmark, Arne; Sottar, Ronny; Engh, Thorvald Abel (Journal article; Peer reviewed, 2018)
      The trend in the aluminum high end market is to set unrealistic quality requirements e.g. inclusion free metal. The importance of quality and the ability to measure is growing. LiMCA is a unique, well-established tool for ...
    • Effects of CO2 cover gas and yttrium additions on the oxidation of AlMg alloys 

      Smith, Nicholas Albert; Gleeson, Brian; wissam, saidi; Kvithyld, Anne; Tranell, Gabriella (Chapter, 2019)
      AlMg alloys are known to suffer from problematic oxidation that can result in significant dross formation and loss of Mg from the melt. Historically, beryllium has been used to minimize the oxidation as it forms a protective ...
    • Furnace Atmosphere and Dissolved Hydrogen in Aluminium 

      Syvertsen, Martin; Kvithyld, Anne; Gundersen, Eilif; Johansen, Inge; Engh, Thorvald Abel (Peer reviewed; Journal article, 2019)
      Hydrogen solubility is much higher in liquid than in solid aluminium. Therefore, if the hydrogen concentration in liquid aluminium is too high prior to solidification, there is high risk of gas porosity formation during ...
    • Mechanism behind the Inhibiting Effect of CO2 on the Oxidation of Al−Mg Alloys 

      Smith, Nicholas Albert; Gleeson, Brian; wissam, saidi; Kvithyld, Anne; Tranell, Gabriella (Journal article; Peer reviewed, 2018)
      Al–Mg alloys are known to suffer from problematic oxidation during melting, refining, and casting. The use of a CO2/air cover gas is known to minimize this oxidation; however, a mechanistic understanding of the beneficial ...
    • Methods of Oxidation Inhibition for Al-Mg Alloys 

      Smith, Nicholas (Doctoral theses at NTNU;2019:29, Doctoral thesis, 2019)
      The oxidation of aluminum will occur at any notable oxygen partial pressure. This oxidation can be favorable as it forms a protective layer on the metal surface which prevents further oxidation. However, the addition of a ...
    • Oxidation of Al-Mg alloys in small scale experiments 

      Skramstad, Magnus; Smith, Nicholas Albert; Kvithyld, Anne; Syvertsen, Martin (Research report, 2019)
      While a significant amount of work has been done on the oxidation of Al-Mg alloys a limited portion of the work has been done under a true furnace atmosphere created by an air-fuel or oxyfuel burner. A series of oxidation ...
    • Oxidation of Manganese-Containing Aluminium Alloys: Oxidation of Molten Mn-Containing Al Alloys in Various Atmospheres 

      Wilson, Shawn (Master thesis, 2013)
      An oxidation study was performed on 99.99% Al, Al1%Mn and Al5%Mn materials, both ina thermogravimetric furnace, and in a muffle furnace. The mass gain behaviour for thesematerials was studied and compared for dierent ...
    • Recycling and Utilisation of Secondary Aluminium Products 

      Meling, Ingrid (Master thesis, 2018)
      Efficient utilisation of secondary aluminium products is increasingly important as the energy consumption and CO2 emissions are greatly reduced by recycling compared to primary production. The aim of this study was to ...
    • Recycling of Aluminium from Mixed Household Waste 

      Eggen, Sigvart; Sandaunet, Kurt; Kolbeinsen, Leiv; Kvithyld, Anne (Chapter, 2020)
      Aluminium is used in packaging due to its density, strength and preservative capabilities. This paper outlines a methodology to evaluate the recyclability of aluminium waste, where parameters of scrap type, pre-treatment ...
    • Recycling of Aluminium from Mixed Household Waste 

      Eggen, Sigvart; Sandaunet, Kurt; Kolbeinsen, Leiv; Kvithyld, Anne (Chapter, 2020)
      Aluminium is used in packaging due to its density, strength and preservative capabilities. This paper outlines a methodology to evaluate the recyclability of aluminium waste, where parameters of scrap type, pre-treatment ...
    • The Mechanism Behind the Oxidation Protection of High Mg Al Alloys with Beryllium 

      Smith, Nicholas; Kvithyld, Anne; Tranell, Gabriella (Journal article; Peer reviewed, 2018)
      The addition of beryllium to Al-Mg alloys is known to cause a dramatic decrease in oxidation; however, the mechanism behind this protective effect is not yet fully understood. To aid in finding an alternative to the toxic ...
    • Thermal Decoating of Aluminium Scrap 

      Kvithyld, Anne (Dr. ingeniøravhandling, 0809-103X; 2003:6, Doctoral thesis, 2003)
      A major problem in the recycling of aluminium is the presence of contaminants in the purchased scrap. Future plants may handle part of this challenge by installing a delacquering/decoating unit. This thesis attempts to lay ...
    • XPS Examination of the Oxide-Metal Interface of an Aluminum-Magnesium Alloy Containing Beryllium 

      Smith, Nicholas; Kvithyld, Anne; Tranell, Gabriella (Chapter, 2018)
      The addition of beryllium to high magnesium aluminum alloys has long been known to cause a significant decrease in the rate of alloy oxidation. A clear understanding of the fundamental mechanism behind this effect is still ...