Sökning: "chromium partition"

Hittade 3 avhandlingar innehållade orden chromium partition.

  1. 1. Investigations of Stabilization of Cr in Spinel Phase in Chromium-Containing Slags

    Författare :Galina Jelkina Albertsson; Lidong Teng; Pekka Taskinen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cr2O3 containing slags; gas-slag equilibrium; chromium partition; spinel;

    Sammanfattning : The influence of basicity, heat treatment as well as different oxygen partial pressures on the phase relationships in the CaO-MgO-SiO2-Cr2O3 slags was studied with a view to control the precipitation of Cr-spinel in the slag phase. The equilibrium phases in CaO-MgO-SiO2-Cr2O3 slag system in the range on 1673-1873 K have been investigated under low oxygen partial pressure as well as in as air atmosphere. LÄS MER

  3. 2. Abatement of Chromium Emissions from Steelmaking Slags - Cr Stabilization by Phase Separation

    Författare :Galina Albertsson; Lidong Teng; Seshadri Seetharaman; Voicu Brabie; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spinel; slag basicity; oxygen partial pressure; chromium oxide vaporization; шпинель; шлак; парциальное давление кислорода; испарение оксидa хрома; 尖晶石; 炉渣碱度; 氧分压; 铬氧化物汽化; spinell; slaggbasicitet; syrepartialtryck; förångning av kromoxid;

    Sammanfattning : Chromium is an important alloying element in stainless steel but also environmentally harmful element. A number of mineralogical phases present in the slag matrix can contain chromium and lead to chromium leaching. LÄS MER

  4. 3. Predictive Modelling of Heavy Metals in Urban Lakes

    Författare :Martin Lindström; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Predictive modelling; heavy metals; lakes; urban influences; Geovetenskap; Earth sciences; Geovetenskap; Sedimentology; sedimentologi;

    Sammanfattning : Heavy metals are well-known environmental pollutants. In this thesis predictive models for heavy metals in urban lakes are discussed and new models presented. The base of predictive modelling is empirical data from field investigations of many ecosystems covering a wide range of ecosystem characteristics. LÄS MER