US1629045A - Blast furnace - Google Patents

Description

May 17 1927. 1,629,045

J. A. PARKER BLAST FURNACE Filed Jul 1925 2 Sheets-Sheet I A TTORN Y.

Patented May 17, 1927.

JOHNKA. PARKER; or RIFLE, coriozmnoj 1 BLAST FURNACE.

Application u e any 7,;

This-invention relates to blastfurnaces I audhas for principal object the improvement of the method and apparatus for 1 utrmlucing the air tunnel-.1 9 'lijli'nace'fso that cold spots or cakes will be avoided and a complete and uniform melt obtained.

Another object is to so construct the furnace that the water jacket which surrounds the'furnace will extend throughout the entire furnace so that all suriaces which are not cooled by the airblast will be cooled the circulating water."

Still another object is to provide a.novel v means for mountin the furnace shaft and crucible so that tight joints will at' alltimes' e maintained both between the shaft and the charging topand between the shaft and crucible. i

Other objects and advantages reside in the detail construction of the invention, which result in simplicity, economy, and efiiciency, and which will become more apparent from the following description.

In the following detailed description of the invention reference is had to the. accompanying drawings which form a part hereof.

Like numerals refer to like parts in all views of the drawings and throughout the description.

In the drawings Fig. 1 is a vertical section through my improved blast furnace taken on the line 1'1,

Fig. 2 is a detail view showing a vertical section through the twyer block, taken on the line 22, Fig. 1.

Fig. 3 is a horizontal section through the furnace, taken on the line 33, Fig. 1.

Fig. i is a fragmentary side elevation of the lower partof the furnace,lool :ingiu the direction of arrow 4, Fig. l.

The furnace comprises a shaft 10, above which, is arranged a charging head 11, and which is suspended over a crucible 12.

The shaft 10 is completely surrounded by a. water jacket 13 which extends, on two sides, entirely to the bottom thereof into contact with the crucible 12. On the other two sides, the water jacket 13 terminates above, what will be designated, a twyer block l i. The lower face of the twyer block le aligns with the lower extremities of the water jacket 13 to form the bottom edge :of the shaft. liater flows into the jacket through suitable inlet pipes 20 and discharges through an. outlet pipe 21.

1925. sci-nu 41,9 52.

The shaft 10 is'supported from aasuitable framework 15 which carries a top plate 16. having an eper-ling corresponding to "the m; rerun-"opening of the sl'iaft. '1l1.e.11,p.per edge of the shaft 1 0 'cla'iiiped tightly against th s, plate 1'6by means of threaded hangers 17 which are attached to'suitable plates 33. on the shaft, and pass through openings in the supporting frame ina vhich they are held by suitable nuts l8. Thecharging head 11 is line'dwith the usual fire brick ining 19, whichrisjbrought out-to the opening in' the plate 16."

This method of supporting" shaft has been found, to i be very efficient since'jall at} tachnifit means are kept wellaway fl'fonlthef eat d Zone -.a L- m the i nae the r suspended on the? ha fige rs17, it ca'n be drawn tightly against the plate 16, and will adjust itself thereto, by the nuts 18. This also allows the water jacket 13 to be continued up to the very top of the furnace where it is replaced byv the fire brick lining of the. charging head 11.

The crucible 12 contains the usual tire clay lining 22, and is carried on a frame 23 jacket contacts with twyer block 14 which in turn contacts with the crucible. The twyer block 14 is cooled by the incoming air blast so that from charging head to crucible no uncooled metal is exposed and the life of the furnaces is greatly increased.

Each twyer block 14 extends entirely across the furnace and contains. a series of independent twyers 27 of unusual design. These twyers 27 have a vertically restricted portion 28 from which they again open outward to a relatively large orifice at the discharge. This construction causes the blast to be projected straight forward from the twyers but atthe same time spreads the blast vertically in'a wide fan-shaped spray. The twyers ofthe opposite twyer block are oppositely placed so that the sprays will meet and be thrown to all parts of the furnace.

This construction forces the air equally to all parts of the furnace and eliminates the usual cold spots or twyer cakes found Where the air is blown through a straight nozzle. Each twyer 27 is provided with one of the usual fusible slag plugs 32. 1

7 Each of the twyers 27 is fed by a separate blast pipe 29, each controlled by an independent valve 30, and fed from a common blast header 31.

This system allows the air to be controlled very accurately so that the distribution in the furnace may be regulated to avoid blow holes in the furnace bed and a uniform blast obtained throughout the bed regardless of its condition. 7

While a specific form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention. I

Having thus described the invention, what I claim and desire secured by Letters Patent is 1. In a blast furnace having a surroundlower faces of said water spaces; and a series of air passages through each of said blocks to the interior of said furnace.

2. In a blast furnace having a surrounding wall, the lower edge of said wall comprising a series of blocks separated by water spaces, said blocks extending entirely through the width of said wall and having their lower faces in alignment with the lower faces of said water spaces; and a series of air passages through each of said blocks to the interior of said furnace, said passages being of less vertical width at the center line of said blocks than at the faces thereof, the horizontal width of said passages heing equal through the thickness of said block.

In testimony whereof, I aflixi my signature.

JOHN A. PARKER.

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