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:
Nov. 30, 1976
Filed:
Mar. 22, 1974
Rudolf Muller, Merzenich, DT;
Johannes Uerlichs, Woffelsbach, DT;
Hermann Rapold & Co. GmbH, Birkesdorf, DT;
Abstract
In a blast preheater for a blast furnace, a control housing has at least one open ended cylinder vertically mounted therein. The cylinder, or each of several cylinders has several axially spaced rows of circumferentially spaced slots, extending through the wall of the cylinder. A slider is slidable in the cylinder for opening, restricting or closing such slots. Wall means are mounted in the housing and are so arranged that in each position of the slider, a first part of the housing surrounding at least one of said rows of slots is separated by the wall means from at least one other part of the housing which communicates with the interior of the cylinder. Separate connectors communicate respectively with the so separated parts of the housing and connect the same to different parts of the blast preheater system, such as the inlet for cold air, under pressure; the inlet for combustion gas, for starting the preheater under lower pressure; the outlet for flue gas from the preheater; and the preheater outlet connecting the hot blast to the blast furnace. One of the new control housings can be provided for each of these lines, or for several of them. The new cylinder and slider system serves to fully open or fully close the line and also to regulate the line by restricting the slots.