Sökning: "strategic metals"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden strategic metals.

1. 1. Utilization of waste materials for extraction of strategic metals : a biogeochemical approach

   Författare :Viktor Sjöberg; Stefan Karlsson; Bert Allard; Mattias Bäckström; Christian Ekberg; Örebro universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biogeochemistry; ICP-QMS; MP AES; strategic metals; vanadium; uranium; mine waste; steel slag; shale residues; Enviromental Science; Miljövetenskap;

   Sammanfattning : Worldwide the modern society produces vast amounts of waste materials containing strategic and valuable metals. Some of them are of substantial economic or environmental significance if controlled recovery of metals can be performed or if uncontrolled release to the environment occurs. LÄS MER

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

   Författare :Hanna Vikström; Per Högselius; Dag Avango; Fjaestad Maja; Ingulstad Mats; KTH; []
   Nyckelord :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;

   Sammanfattning : 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. LÄS MER

4. 3. Technological Change in an International Industrial System

   Författare :Leif Linnskog; Ulf Johanson; Peter Söderbaum; Hans Hasselbladh; Mälardalens högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; technology; technological change; industrial networks; business relationships; strategic intention; power; negotiations; social capital; coalitions; structural inertness; Industrial organisation; administration and economics; Industriell organisation; administration och ekonomi; Industriell ekonomi och organisation;

   Sammanfattning : Industrial systems resist change, more often, because heavy production facilities and industrial constructions are expensive and have long economic lives, but also because people tend to defend ingrained conceptions of how things are and how activities ought to be performed. Starting out from the question: “How does technological change come about in an international, industrial system?” the thesis investigates the interplay between technological, social, and economic factors. LÄS MER

5. 4. Characterization of Pathfinders and Indicators of Gold

   Författare :Gabriel Kofi Nzulu; Martin Magnuson; Per Eklund; Hans Högberg; Farid Akhtar; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Pathfinder; Indicator; Gold; Hydrothermal; X-ray; Diffraction; Kubi; Ghana;

   Sammanfattning : Research on natural minerals and their chemical bonding to economically critical raw materials is a viable industrially relevant research area due to its increasing demand. Meeting demands requires fast, robust, and efficient techniques to explore new ore deposits and continuous operation of active mines as well as recycling. LÄS MER

7. 5. Improving trace metal characterisation of ore deposits through multi-modal, multi-scale, and multi-dimensional micro-analysis

   Författare :Mathis Warlo; Christina Wanhainen; Glenn Bark; Alan R Butcher; Nigel Cook; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ore Geology; Malmgeologi;

   Sammanfattning : The variety and amount of metals consumed by human society is ever increasing. Meeting the demand requires exploration for new ore deposits, efficient production of active mines, and improved efficiency in metal recycling. A key element in mining-related enterprises is the improvement of ore characterisation. LÄS MER