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:
May. 10, 2011
Filed:
Nov. 24, 2006
Ryosuke Nakamura, Tokyo, JP;
Hiroyuki Shikama, Tokyo, JP;
Hisashi Tomiya, Tokyo, JP;
Hisaharu Sasaki, Tokyo, JP;
Ryosuke Nakamura, Tokyo, JP;
Hiroyuki Shikama, Tokyo, JP;
Hisashi Tomiya, Tokyo, JP;
Hisaharu Sasaki, Tokyo, JP;
Shinagawa Refractories Co., Ltd., Tokyo, JP;
Abstract
A refractory brick having durability equal to alumina-magnesia castable materials, which is especially suitable for a ladle for steel making is provided. A refractory brick prepared by using an alumina raw material and a magnesia raw material containing 90% by mass or more of a fine powder of not more than 0.5 mm, press molding and then heat treating at 100° C. or higher and not higher than 1,150° C., the refractory brick containing AlOand MgO in a total sum of 90% by mass or more, from 4 to 16% by mass of MgO, from 0.5 to 5% by mass of SiO, and NaO and KO in a total sum of from 0.3 to 2% by mass, with the remainder being inevitable impurities and AlO.