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:
Jun. 25, 1985
Filed:
Jan. 13, 1984
Dirk Hankel, Muhlheim, DE;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Calcine which has been obtained by roasting in a fluidized bed and contains zinc oxide is briquetted at elevated temperatures. To produce briquettes having desirable properties for processing in a zinc-producing shaft furnace, the calcine is provided with metallic lead and/or lead oxide in an amount corresponding to at least 3% lead, non-caking coal having a low content of volatile constituents is admixed to the calcine, the Pb:C weight ratio is adjusted to at least 1, and the mixture is briquetted at a compacting temperature of 250.degree. to 470.degree. C. and under an applied pressure amounting to 4 to 20 metric tons per centimeter or roll width when said pressure is dynamically measured.