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:
Mar. 27, 1990
Filed:
Nov. 21, 1988
David J Michael, White Oak, PA (US);
David A Kirk, Pittsburgh, PA (US);
Leigh F Brooks, Pittsburgh, PA (US);
Dresser Industries, Inc., Dallas, TX (US);
Abstract
A mix for forming a carbon-bonded refractory shape comprising from about 70 to 92 wt. % of a high purity magnesite and about 8 to 30 wt. % of a high purity graphite, and for each 100 wt. % of said magnesite and graphite, from about 1.5 to 6 wt. % of a carbon-containing bonding agent; said graphite containing at least about 98% carbon and having at least about 75% by weight -65 mesh or finer particles and said magnesite containing at least about 98% MgO, and containing less than about 0.03% boron oxide, less than about 0.3% silica, and having a CaO/SiO.sub.2 weight ratio above about 2, and the resultant carbon-bonded refractory shape and liner for basic oxygen furnaces made from such shapes and the method of increasing the life of liners for basic oxygen furnaces.