Method of expanding mineral ores using microwave radiation
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United States of America Patent
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Issued Date -
Nov 30, 2006
app pub date -
Jul 15, 2005
filing date -
May 25, 2005
priority date (Note) -
Abandoned
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Abstract
Here is described a method of expanding mineral ore particles, preferably perlite, to effect rapid heating of particles to a required softening temperature so that the selected size and shape of expanded ore particles is obtained. A microwave radiation with appropriate frequency and power density is chosen so as to accomplish particle heating to a required (e.g., softening) temperature in a selected short time while ensuring that the entire particle material is expanded at once. The method provides high efficiency of the expanding process that can be close to 100%.
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