The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2012
Filed:
Aug. 02, 2006
Erwin Penfornis, Levallois-Perret, FR;
Maguelonne Hammel, Montigny le Bretonneux, FR;
Pascal Duperray, Montigny le Bretonneux, FR;
Xavier Paubel, Chatenay Malabry, FR;
Erwin Penfornis, Levallois-Perret, FR;
Maguelonne Hammel, Montigny le Bretonneux, FR;
Pascal Duperray, Montigny le Bretonneux, FR;
Xavier Paubel, Chatenay Malabry, FR;
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.