Applications of microwave energy in extractive metallurgy, a review

Abstract In the last few decades, microwave energy has been widely employed in food processing, rubber and plastics curing, and in ceramic sintering. Recently, the application of micro waves as an energy source in extractive metallurgy has received considerable attention from a number of researchers. During the period from the mid- 1960s to about 1988, the majority of the research was focussed on the behaviour of materials in microwave radiation. These research activities will continue to be important, since fundamental data on the interaction of microwaves with materials are vital for the successful application of the technology. Since 1990, a number of potential applications of microwave processing have been investigated. These include: pretreatment of ores and concentrates, leaching, reduction, preheating of refractories, heating of slags and waste treatment. In this paper, the interaction of microwaves with materials of interest in extractive metallurgy are reviewed and potential applications are discussed.
Keywords: Metallurgy, Extractive Metallurgy, Microwave energy.
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Summary: Airborne Synthetic Aperture Radar (SAR) was acquired over the Carajás Mineral Province, within the rainforests of the Amazon, which hosts the world’s largest Fe-ore deposit (Santos, 1986). Significant chemical weathering exists in this humid environment. Prevalent Au mineralization is thought to be generally associated with deformation zones in Archean schists.
Radar data have proven to be very useful as an aid to geological mapping in the tropical rainforests of the Amazon Basin in Brazil....
Publication: CIM Bulletin
Author(s): D.F. Graham, J.S. Moretzsohn
Keywords: Geology, Geological mapping, Airborne Synthetic Aperture Radar (SAR)
Issue: 1011
Volume: 90
Year: 1997
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Summary: Global Positioning Satellite (GPS) based positioning and navigation systems have been recently developed and implemented by AQUILA Mining Systems Ltd. on blasthole drills and electric cable shovels in Canadian open pit coal and iron ore mines. These systems enable the location of the drill bit or the shovel tracks to be accurately determined in three dimensions.
The position of the drill or shovel is displayed to the operator via a real-time, Moving Map Display (MMD) on an LCD-VGA screen. The...
Publication: CIM Bulletin
Author(s): Jonathan Peck, Carl Hendricks
Keywords: Equipment, Navigation systems, Global Positioning Systems, Open pit mining, Moving Map Display.
Issue: 1011
Volume: 90
Year: 1997
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