Method for calcination of a material with low nochi emissions
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United States of America Patent
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Mar 20, 2012
Grant Date -
May 21, 2009
app pub date -
Aug 2, 2006
filing date -
Aug 3, 2005
priority date (Note) -
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Abstract
The invention relates to a method for calcination of a material in which said material is heated by contact with a heat source essentially generated by means of a flame produced with at least one flow of fuel and primary air and a flow of secondary air, the flame comprising a first combustion zone with a temperature below 1500° C. and a second combustion zone with a temperature above 1500° C., where at least one flow of at least one inert gas is injected into the flame at the beginning of the second combustion zone and/or at least one flow of oxygen or a gas enriched in oxygen is injected into the second combustion zone.
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