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. 31, 2015
Filed:
Mar. 17, 2009
Fernand Didelon, Longeville-les-Metz, FR;
Yves Rachenne, Vantoux, FR;
Christian Gillion, Lille, FR;
Jean Borlee, Neupre, BE;
Dominique Sert, Montoy-Flanville, FR;
Fernand Didelon, Longeville-les-Metz, FR;
Yves Rachenne, Vantoux, FR;
Christian Gillion, Lille, FR;
Jean Borlee, Neupre, BE;
Dominique Sert, Montoy-Flanville, FR;
Arcelormittal Investigación y Desarrollo, S.L., Sestao Bizkaia, ES;
Abstract
A process for recycling blast furnace gas is provided. At least one portion of the gases resulting from the blast furnace undergo a COpurification step to create a CO-rich gas which is reinjected at a first top injection point at a temperature between 700° C. and 1000° C. through a top injection line, and at a second bottom injection point at a temperature between 1000° C. and 1300° C. through a bottom injection line. The gases from the bottom and top injection lines are heated at a temperature between 1000° C. and 1300° C. A portion of the CO-rich gas exiting the purification step is directly introduced into the top injection line via a cold gas injection line to obtain a temperature between 700° C. and 1000° C. at the first top injection point. The gas that flows through the bottom and top injection points controlled upstream of the system of the heaters. A device is also provided.