Browsing NTNU Open by Author "Kleiv, Rolf Arne"
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A preliminary study of the Ni-Cu-Co sulphide concentrator at Titania AS
Osen, Jenny (Master thesis, 2024)Denne masteroppgaven er en innledende mineralogisk studie på sulfidsløyfa hos Titania AS. Titania AS er en gruve som ligger i Hauge i Dalanae i sørvest Norge, som i all hovedsak produserer et ilmenittkonsentrat (gj. snitt ... -
Adsorptive retention of copper from acidic mine water at the disused sulphide mine at Lokken, central Norway - initial experiments using olivine
Kleiv, Rolf Arne; Thornhill, Maria (Peer reviewed; Journal article, 2004)This paper investigates the chemical potential of using forsterite olivine to remove copper from acidic mine water through the actions of neutralisation and adsorption. The study was initiated by The Norwegian Directorate ... -
Application of a Rapid and Simple UV-spectrophotometric method for the study of desorption of esterquat collectors in Tailings-Seawater Systems
Ibragimova, Olga; Kleiv, Rolf Arne (Journal article; Peer reviewed, 2018)The growing demand for mineral resources followed by the steady increase in mining activity result in the need for the disposal of large amount of tailings. Submarine tailings placements (STPs) is a viable option to ... -
Deep-Sea Mining–A Bibliometric Analysis of Research Focus, Publishing Structures, International and Inter-Institutional Cooperation
Kleiv, Rolf Arne; Thornhill, Maria (Journal article; Peer reviewed, 2022)Deep-sea mining is a multidimensional concept that requires interdisciplinary research and development to close the current knowledge gaps. This study conducts a bibliometric analysis of the research focus, publishing ... -
Development of an Ultraviolet-Spectrophotometric Method for Analysis of Esterquat-Containing Flotation Collectors in Aqueous Solutions
Ibragimova, Olga; Kleiv, Rolf Arne (Journal article; Peer reviewed, 2018)In this study, a rapid and simple ultraviolet‐spectrophotometric method was developed and validated for the quantitative determination of esterquat‐containing flotation collector FLOT 2015 in aqueous solutions. This method ... -
Development Towards a New Test Procedure for Flotation at Brønnøy Kalk
Havskjold, Håkon Engum (Master thesis, 2016)Brønnøy Kalk AS is a mining company established in 1997 and is localized in Brønnøy, Norway. Approximately 2 million tonnes of ground calcium carbonate (GCC) raw material is mined annually. No processing of the marble is ... -
Dissolution and carbonation of mechanically activated olivine-Investigating CO2 sequestration possibilities
Haug, Tove Anette (Doctoral Theses at NTNU, 1503-8181; 2010:5, Doctoral thesis, 2010)Mineral carbonation used for CO2 sequestration faces three main challenges: increasing the overall carbonation rate, handle large amounts of feedstock and products, and developing a practical process with commercially ... -
The effect of mechanical activation in the production of olivine surface area
Kleiv, Rolf Arne; Thornhill, Maria (Peer reviewed; Journal article, 2016)This study investigates the effect of dry mechanical activation of olivine as a pre-treatment step prior to wet milling with respect to the production of specific surface area. Milling experiments combining the two milling ... -
Efficient extraction of copper and zinc from seafloor massive sulphide rock samples from the Loki's Castle area at the Arctic Mid-Ocean Ridge
Kowalczuk, Przemyslaw B.; Snook, Ben; Kleiv, Rolf Arne; Aasly, Kurt (Journal article; Peer reviewed, 2018)Seafloor massive sulphide (SMS) deposits have been identified as important marine metal resources for the future. However, literature on the recovery/extraction of metals from SMS is currently limited, and to date, no ... -
A flotation-based approach to the quantification of pyrrhotite in concrete aggregates
Kleiv, Rolf Arne (Journal article; Peer reviewed, 2021)Pyrrhotite-bearing aggregates are a major cause of internal sulphate attack (ISA) in concrete. The concentration of pyrrhotite is usually too low to permit direct accurate quantification. Hence, safety restrictions put on ... -
Galvanic Leaching of Seafloor Massive Sulphides Using MnO2 in H2SO4-NaCl Media
Kowalczuk, Przemyslaw; Dan, Oliric Manaig; Drivenes, Kristian; Snook, Ben; Aasly, Kurt; Kleiv, Rolf Arne (Journal article; Peer reviewed, 2018)This paper reports the leaching of seafloor massive sulphides (SMS) from the Loki’s Castle area at the Arctic Mid-Ocean Ridge in sulphuric acid with manganese dioxide and sodium chloride. The results presented are of various ... -
Guidelines and best available techniques for submarine tailings disposal in Norwegian fjords: Recommendations from the NYKOS project
Ramirez-Llodra, Eva; Andersen, Guri Sogn; Bekkby, Trine; Brooks, Steven; Escudero-Oñate, Carlos; Gundersen, Hege; Schaanning, Morten; Trannum, Hilde Cecilie; Yakushev, Evgeniy; Baeten, Nicole; Lepland, Aivo; Ibragimova, Olga; Kleiv, Rolf Arne; Nepstad, Raymond; Muñoz, María; Høgaas, Helge; Sandøy, Roar (NIVA-rapport;, Research report, 2019)The NYKOS project aimed at addressing some of the main knowledge gaps on the environmental impacts of submarine tailing disposal (STD) to facilitate the development of techniques, practices and management measures that ... -
Mechanical Activation of Olivine
Kleiv, Rolf Arne; Thornhill, Maria (Peer reviewed; Journal article, 2006)This paper investigates how mechanical activation of olivine can increase the mineral’s surface reactivity, and illustrates how such technology can give rise to new or improved olivine products. The olivine material used ... -
Mineralogical and textural characterization for increased iron oxide recovery. Exemplified on the Storforshei iron formation
Tøgersen, Marte Kristine (Doctoral theses at NTNU;2019:309, Doctoral thesis, 2019)Process mineralogy is increasingly becoming an important part of quality control in mining operations, and chemical assays are not sufficient for predicting metallurgical performance of complex ore deposits. Knowledge of ... -
Mineralogiens betydning for materialbalansen i ulike produktstrømmer ved prosessanlegget til Rana Gruber
Johnsrud, Annicka (Master thesis, 2018)er enda ikke skrevet -
Mineralogy and texture of the Storforshei iron formation, and their effect on grindability
Tøgersen, Marte Kristine; Kleiv, Rolf Arne; Ellefmo, Steinar Løve; Aasly, Kurt (Journal article; Peer reviewed, 2018)Investigating how ore mineralogy and texture affect the recovery from the processing plant is important for any mining operation. The results will assist in production planning and optimising the utilisation of a deposit. ... -
New insights into submarine tailing disposal for a reduced environmental footprint: Lessons learnt from Norwegian fjords
Ramirez-Llodra, Eva; Trannum, Hilde Cecilie; Andersen, Guri Sogn; Baeten, Nicole; Brooks, Steven; Escudero-Oñate, Carlos; Gundersen, Hege; Kleiv, Rolf Arne; Ibragimova, Olga; Lepland, Aivo; Nepstad, Raymond; Sandøy, Roar; Schaanning, Morten; Shimmield, Tracy; Yakushev, Evgeniy; Ferrando-Climent, Laura; Høgaas, Per Helge (Peer reviewed; Journal article, 2022)Submarine tailing disposal (STD) in fjords from land-based mines is common practice in Norway and takes place in other regions worldwide. We synthesize the results of a multidisciplinary programme on environmental impacts ... -
Non-HF collectorless flotation of quartz
Larsen, Erik; Kowalczuk, Przemyslaw; Kleiv, Rolf Arne (Journal article; Peer reviewed, 2019)Pure mineral flotation experiments have demonstrated that quartz can be floated without a collector, in solutions containing an inorganic acid (e.g. H2SO4) and sodium fluoride (NaF). Excellent quartz recoveries, similar ... -
Optimal utilisation of unbound crushed aggregates for road construction
Fladvad, Marit (Doctoral thesis, 2020)Aggregates are construction materials produced from non-renewable rock resources. Because high-quality aggregate resources have limited availability, utilisation of aggregates should be considered carefully to prevent ... -
Performance Evaluation and Optimization of the REFLUX Flotation Cell (RFC) in Processing Kupferschiefer-type Copper Ore
Güner, Mustafa Kadir (Doctoral theses at NTNU;2024:499, Doctoral thesis, 2024)The demand for metals continues to surge, necessitating advancements in mineral processing technologies to increase production capacity and efficiency. Flotation, a predominant method for separating valuable minerals from ...