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:
May. 04, 1999
Filed:
Aug. 11, 1997
Piergiorgio Fontana, Genoa, IT;
Demag Italimpianti S.p.A., , IT;
Abstract
A rotary furnace for the treatment of minerals, includes an annular chamber provided with a material feeder apparatus and discharge apparatus for the material, disposed adjacent one another in a certain sector of the chamber. A plurality of burners are arranged all along the annular chamber on the side walls and on the top wall thereof. The furnace further includes a conduit for extracting the discharge gases. The gases from a first zone of the chamber downstream of the feeder means and upstream of the gas extraction means, with respect to the direction of rotation of said hearth, are transferred into a second zone upstream of the material discharge means and downstream of the gas extraction means through forced conveying of the gases by suction at the first zone and by pressure delivery at the second zone. A flow regulator is used to regulate the forced conveying.