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:
Oct. 25, 1977
Filed:
Apr. 16, 1976
Csepeli Femmu, Budapest, Csepel, HU;
Abstract
A relatively simple and rapid process for the production of high-grade copper from an inexpensive starting material such as blister copper or copper scraps is described. The starting material is conventionally smelted and oxidized, after which the charge is subjected to a slagging operation to obtain a pre-refined copper bath. After the slagging step, an artificial slag cover is formed on the pre-refined copper bath using a mixture of (1) an oxide of at least one element selected from the group consisting of silicon, phosphorous and boron, and (2) an oxide of at least one element selected from the group consisting of titanium, aluminum, calcium, strontium, barium, magnesium, sodium, potassium and lithium. At least two of such elements are then fed to the bath through the slag cover as alloying components. After such resulting bath is mixed for at least 30 seconds and is left standing for an additional 15 minutes, the slag cover is removed. A conventional reduction step may then be accomplished to complete the refining process.