Search for dissertations about: "critical metals"

Showing result 1 - 5 of 106 swedish dissertations containing the words critical metals.

  2. 1. Selective Comminution Applied to Mineral Processing of Critical Metals

    Author : Lorena Guldris Leon; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; selective comminution; compressive crushing; analytical method; minerals; critical metals; elements.;

    Abstract : The outstanding properties of tungsten and tantalum make them valuable metals and, in some cases, irreplaceable in applications. Due to the vital economic importance and limited supply, growing interest places these metals on the critical metals risk list. READ MORE

  4. 2. The Specter of Scarcity : Experiencing and Coping with Metal Shortages, 1870-2015

    Author : Hanna Vikström; Per Högselius; Dag Avango; Fjaestad Maja; Ingulstad Mats; KTH; []
    Keywords : HUMANIORA; HUMANITIES; scarcity; critical metals; Sweden; small countries; strategic metals; metal shortages; history of technology; experiences of scarcity; coping with shortages; technological trends; World War I; resource crisis; construction of resources.; Historiska studier av teknik; vetenskap och miljö; History of Science; Technology and Environment;

    Abstract : In spite of an ever-growing supply of metals, actors have long feared metal shortages. This thesis – departing from an understanding that metals scarcity is not an objective geological fact, but an experience, a fear of a shortage – explores why business and state actors have experienced metals as scarce and how they coped with scarcity from 1870 to 2015. READ MORE

  5. 3. Neutron scattering studies of hard metals

    Author : Ahmet Bahadir Yildiz; Peter Hedström; Annika Borgenstam; Joakim Odqvist; Daniele Mari; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hard metals; cemented carbides; small angle neutron scattering; neutron diffraction; in-situ characterization; grain coarsening; phase separation; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : Since their discovery about 100 years ago, tools made of hard metals have been the enablers of development in various areas: from drilling subway lines for more sustainable cities to the machining of complex next-generation airplane engine parts for reduced CO2 emissions. An increase in properties of hard metals thus leads to efficient operations with shorter lead-time, less environmental footprint, and reduced cost. READ MORE

  6. 4. Reprocessing historical tailings for possible remediation and recovery of critical metals and minerals : The Yxsjöberg case

    Author : Jane Mwaba Mulenshi; Jan Rosenkranz; Saeed Chehreh Chelgani; Urs Peuker; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining waste; Historical tailings; Conceptual framework; Critical raw materials; Tungsten; Scheelite; Characterization; Mineral liberation analysis; Beneficiation; Reprocessing; Mineral Processing; Mineralteknik; Centrumbildning - Centrum för avancerad gruvteknik och metallurgi CAMM ; Centre - Centre for Advanced Mining Metallurgy CAMM ;

    Abstract : With increasing consumption of primary mineral resources, the generation of mining wastes has also increased thus requiring the mining industry to address the growing environmental concerns. Waste rock and tailings are potential secondary sources of critical raw materials currently in short supply in the European Union, but also a source for environmental issues like acid mine drainage. READ MORE

  7. 5. Sub-critical crack growth in some metals and polymers

    Author : Hans Nordberg; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE