Search for dissertations about: "Flotation"

Showing result 11 - 15 of 106 swedish dissertations containing the word Flotation.

  2. 11. Altering consciousness in the laboratory setting

    Author : Anette Kjellgren; Karlstads universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Key words: Altered states of consciousness; ASC; Floating; Flotation; REST; Psychedelic; Pain; Creativity.; Psykologi; Psychology;

    Abstract : Abstract. The purpose of the presented investigations was to study the phenomenology and effects of altered states of consciousness (ASC) induced through previous illicit use of psychedelic drugs as well as experimentally induced ASC through the flotation tank restricted environmental stimulation technique (flotation-REST) in a laboratory setting. READ MORE

  4. 12. Surface chemical studies on feldspar/quartz system using alkylamines and mixed (cationic/anionic/non-ionic) collectors : adsorption mechanisms and flotation selectivity

    Author : Ari Vidyadhar; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineralteknik; Mineral Processing;

    Abstract : The mechanism of adsorption of long chain alkyl primary amines and, co-adsorption of amines and alcohols on quartz were studied using FTIR (DRIFT and IRRAS) and XPS spectroscopy methods. The spectroscopy data were correlated with zeta-potential and Hallimond flotation results. READ MORE

  5. 13. Potential of Organosolv Lignin Nanoparticles as a Sustainable Flotation Reagent : Towards a Low-Carbon Footprint Mining Industry

    Author : Katerina Hruzova; Ulrika Rova; Saija Luukkanen; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Organosolv lignin particles; Nanoparticles; Flotation reagent; Copper recovery; Biokemisk processteknik; Biochemical Process Engineering;

    Abstract : The green transition is driving a steep increase in the demand for minerals, which has put the focus on more responsible and sustainable mining practices as there is a growing pressure on mining operations to minimise their environmental footprint, mitigate risks in neighbouring communities, and decrease the consumption of natural resources. In 2022, mineral froth flotation was used to recover 18 million tonnes of copper from copper ore, accounting for 80% of total copper mine output. READ MORE

  6. 14. Separation of plastics by flotation

    Author : Huiting Shen; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineralteknik; Mineral Processing;

    Abstract : This thesis analyses and summarises the importance of plastics waste recycling and plastics waste separation, presents an innovative principle for plastics flotation, and provides various methods for the separation of plastics mixtures. The objective is to understand the mechanisms for selective flotation separation of plastics, get plastics mixtures separated and enable more plastics wastes to be recycled. READ MORE

  7. 15. Selective Separation Of Wood Components In Internal Process Waters Originating From Mechanical Pulping

    Author : Dariusz Zasadowski; Magnus Norgren; Bjarne Holmbom; Mittuniversitetet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; flotation; foaming agents; chelating surfactant; TMP process water; pitch control; internal cleaning stage; hemicellulose recovery; anti‐solvents; solvents; precipitation;

    Abstract : Dissolved and Colloidal substances (DSC) and metals are released from woodduring thermomechanical pulp (TMP) production. These components have atendency to accumulate in process waters, as the water circulation systems inintegrated paper mills are closed. READ MORE