Search for dissertations about: "thesis in bioleaching"

Showing result 1 - 5 of 8 swedish dissertations containing the words thesis in bioleaching.

  2. 1. Chalcopyrite Dissolution in Sulphate-Based Leaching and Bioleaching Systems

    Author : Mohammad Khoshkhoo; Wolfgang Sand; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Abstract : Chalcopyrite (CuFeS2) is the most abundant and the most economically important copper mineral. Increasing worldwide demand for copper accompanied by exhaustion of copper resources necessitate the development of new processes for treating lower-grade copper ores. READ MORE

  4. 2. Comparative study on different industrial oxidic by-products as neutralising agent in bioleaching

    Author : Chandra Sekhar Gahan; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Abstract : A comparative study on bioleaching of a pyrite concentrate using ten different industrial oxidic by-products as neutralising agent has been performed with a commercial grade slaked lime chemical serving as reference material. The acid produced during oxidation of pyrite was neutralised by regular additions of neutralising agent whenever needed to maintain a pH of 1. READ MORE

  5. 3. Chalcopyrite (Bio)leaching in Sulphate Solutions : An Investigation into Hindered Dissolution with a Focus on Solution Redox Potential

    Author : Seyed Mohammad Khoshkhoo Sany; Joachim Petersen; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Abstract : Chalcopyrite (CuFeS2) is the most abundant and the most economically important copper mineral. Increasing worldwide demand for copper accompanied by exhaustion of copper resources necessitate the development of new processes for treating lower-grade copper ores. READ MORE

  6. 4. Possibilities to use industrial oxidic by-products as neutralising agent in bioleaching and the effect of chloride on biooxidation

    Author : Chandra Sekhar Gahan; S. Subramanian; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Abstract : The cost for neutralisation is the second largest cost in a bioleaching operation for which, possibilities to replace generally used lime/limestone was tested. Industrial oxidic by-products generated form Swedish industries were investigated for neutralising capacities by chemical leaching with sulphuric acid at pH 1. READ MORE

  7. 5. Function and Adaptation of Acidophiles in Natural and Applied Communities

    Author : Stephan Christel; Mark Dopson; Michael Schlömann; Linnéuniversitetet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Acidophiles; Biomining; Psychrophiles; Adaptation; Acid Sulfate Soil; Redox Control; Ecology; Ekologi;

    Abstract : Acidophiles are organisms that have evolved to grow optimally at high concentrations of protons. Members of this group are found in all three domains of life, although most of them belong to the Archaea and Bacteria. READ MORE