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:
Sep. 21, 2004
Filed:
Jun. 06, 2002
Applicant:
Inventors:
Assignee:
Outokumpu Oyj, Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 1/72 ;
U.S. Cl.
CPC ...
C02F 1/72 ;
Abstract
The present invention concerns equipment for the leaching of solid matter from a sludge with the aid of a gas containing oxygen, the said equipment comprising a tall reactor ( ) equipped with a central pipe ( ) and from the reactor bottom ( ), an upward-directed double-action mixer ( ). The mixer is situated in the vicinity of the lower edge of the central pipe: the upper blades ( ) of the mixer produce a downward suction flow from the central pipe, and the lower blades ( ) disperse the gas to be fed into the sludge in the form of small bubbles, thereby preventing the solid matter from settling to the bottom of the reactor.