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. 27, 1983
Filed:
May. 05, 1982
Takashi Moriyama, Tokyo, JP;
Denka Engineering Kabushiki Kaisha, Tokyo, JP;
Abstract
An apparatus for injecting a gas-laden refining agent into molten metal in a ladle comprises a multinozzle lance which has a plurality of introduction tubes in a lance body and a plurality of nozzles mounted in the lance body and connected to the introduction tubes, the nozzles opening substantially tangentially to an outer circumferential surface of the lance body. Each of the nozzles is molded of boron nitride and in the form of a conical taper which becomes progressively smaller in diameter toward the outer circumferential surface of the lance body. There is a system for independently distributing the gas-laden refining agent under pressure through a plurality of feed pipes which are connected to the introduction tubes, respectively, of the multinozzle lance.