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. 25, 1984
Filed:
Sep. 29, 1982
Applicant:
Inventor:
Nicolaas A Hasenack, Castricum, NL;
Assignee:
Estel Hoogovens B.V., , NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264 59 ; 264 64 ; 264 65 ; 264 66 ; 264125 ;
Abstract
Fly ash is agglomerated into pellets in order to render it environmentally harmless and suitable for dumping. The fly ash is mixed with water in an unclassified condition and formed into green pellets which are heated in a two-stage heating process. In the first heating stage carbon in the pellets is rapidly gasified while iron present is not reduced below Fe.sub.3 O.sub.4. In the second heating stage, the pellets are rapidly sintered. The whole heating process is less than 60 minutes and to permit this rapid heating, the pellets must be of sufficient porosity to withstand the rapid gasification of the carbon and the rapid sintering without breaking up.