US602947A - Blast-furnace - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1,

E. KELLY & H B, WEAVER. BLAST FURNACE.

No. 602,947. Patented AprQZG, 98.

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WITNESSES. i 718 g A TTOBNEYS.

(No Model.) 2 Sheets-5heet 2.

E. KELLY 8v H. B. WEAVER.

BLAST FURNACE.

No. 602,947. Patented Apr. 26, 1898.

WI TNESSES.

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UNITED STATES PATENT EDWARD KELLY AND HARRY BENJAMIN YVEAVER, OF PORT ORAM, NEW JERSEY.

BLAST-FU RNACE.

SIEGIFICATION forming part of Letters Patent No. 602,947, dated April 26, 1898.

Application filed $eptember 29, 1897. fierial No. 653,485. (No model.)

To all whom, it may concern:

Be it known that we, EDWARD KELLY and HARRY BENJAMIN WEAVER, citizens of the United States, residing at Port Oram, in the county of Morris and State of New Jersey, have invented certain new and useful Improvements in Blast-Furnaces, of which the following is a full and complete specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to blast-furnaces; and the object thereof is to supply to the crucible of a blast-furnace a circumferentially-continuous current of air and also to provide means for cooling the twyers and to prevent the walls of the furnace around the same from burning out.

The high heat generated at the entrance of a current of air into the crucible of a blastfurnace melts away the walls thereof unless they are protected by water-cooling devices, and in the practice of our invention we employ hollow metal shells through which water is circulated for this purpose.

Heretofore the twyers have been placed at intervals around the crucible, leaving, when the furnace is in operation, dead-spaces in the fuel between the twyers, where the air does not act on the fuel, and to overcome this objection we use a twyer with a narrow delivery-orifice and make it as nearly continuone as possible around the entire furnace.

The invention is fully disclosed in the following specification, of which the accompanying drawings form a part, in which Figure 1 is a central vertical section of a part of a blast-furnace, showing one of our improved twyers in. vertical section; Fig. 2, a side view looking in the direction of the arrow 2 of Fig. 1; Fig. 3, a horizontal section of a watercasiug which we employ between the twyers; Fig. 4, a partial section on the line 4 4 of Fig. 1; Fig. 5, a side View looking in the direction of the arrow 5 of Fig. 4, and Fig. 6 a transverse section of the casing of one of the twyers and showing the twyers in position.

In the drawings forming part of this specification the separate parts of our improvement are designated by the same numerals of reference in each of the views, and in Figs. 1, 2, and 5 we have shown at 7 a part of the wall of a furnace, and in the practice of our invention we place therein circumferentially around the same a plurality of casings 8, which are wider in vertical section at their outer than at their inner ends and in which are placed supplemental casings 9, and these casings are of the form shown in Figs. 1, 4, 5, and 6 and are much wider in cross-section than in vertical depth, and the upper side of said casings are arch-shaped in form, and a water-space 1O entirely surrounds the supplemental inner casing Q. Mounted in each of these casings and within the inner supplemental casing 9 is a twyer 11, which is rectangular in cross-section and the side walls of which are parallel, and said twyer consists of an inner casing 12, around which is placed an outer casing 13, and between the inner casing 12 and the outer casing 13 is a waterspace 14, as shown in Figs. 1, 4, and 6, and the twyer 11 opens inwardly, as shown in Figs. 1 and 4, and the orifice thereof is verynarrow.

The outer end of the twyers is provided with a flange or plate 15, which closes the water-space 14 therein, and bolted thereto is a front plate 16, which is provided with a conical nozzle 17, to which is secured a tubular head 18, this construction being best shown in Figs. 1 and 4, and said tubular head 18 is provided with a branch tube 19, with which the air-supply pipe 20 is connected.

' Extending into the water-space 10, at 0pposite corners of the main casing S, in which the twyers are placed, are water- pipes 21 and 22, and these water-pipes serve as means for supplying said spacing with water, and in practice the water enters said casing through one of said pipes and leaves the same through the other, and extending into the water-chamber 14, which incloses the inner casing of the twyer, at opposite corners thereof, are pipes 23 and 24, and in practice water enters said chamber through one of said pipes and leaves the same through the other.

The front plate 16 closes the outer end of the twyer 11, as will be readily understood, and formed therein are a plurality of openings 25, which are closed by plugs 26, composed of any desired material, and the object of these holes or openings is to provide means whereby the interior of the twyer may be examined and cleaned when necessary. We also place between the sides of the casings 8, in which the twyers are placed, triangular water-chambers 27, and these water-chambers are also provided with water ingress and egress pipes 28 and 29, and water is also freely circulated through said water-chambers 27. These water-chambers 27 are preferably made strong and heavy and serve as supports for the upper part of the furnace-walls, and the arches 3O serve in connection with said water-chambers for this purpose, and the casing 8 may be removed from beneath said arches whenever desired.

The twyers l1 and the inner ends of the casings 8, in which they are placed, are very Hat, and the inner ends of the twyers extend inwardly slightly beyond the inner walls of said casings, and said inner ends of the twyers are also slightly curved in form to correspond with the inner walls of the blast-furnace, and by forming the twyers in this manner and by making the sides thereof parallel or nearly so the currents of air discharged therethrough into the furnace form almost a continuous sheet, andsaid currents meet each other a short distance from the ends of the twyers and make practically a continuous current of air entering the crucible or furnace.

We are aware that continuous currents of air under pressure of from six to eight ounces have been blown into a cupola; but the heat generated is not high, like it is in a blastfurnace such as herein described, and no water cooling is required, as in this case, where a pressure of from ten to twenty pounds to the square inch is employed.

To use a continuous water-cooled passage would require the upper walls to be supported in the blast-furnace independent of the lower walls, so that the continuous passage could be moved in the event of repairs. This would be impracticable, as any supports would have to be supported from overhead, where they would be in the way of the pipes and attachments required for the operation of the furnace, and to obviate this objection we use the separate parts of water, cooled as hereinbefore described, and use a number of flat twyers.

In the operation of this device the air is admitted through the pipes 20 into the separate twyers, it being understood that each twyer is provided with such a pipe, and said air passes into the crucible or furnace, where it oxidizes the. fuel, and cast-iron is produced, as will be readily understood, and it will thus be seen that We accomplish the object of our invention by means of devices which are simple in construction and operation and well adapted to produce the result for which they are intended.

Having fully described our invention, we claim as new and desire to secure by Letters Patent 1. The combination with the walls of a blastturnace, of twyers having parallel side walls arranged circumferentially thereof, the width of the several twyers being such that their inner ends are nearly in contact so as to ad unit a circumferentially-contin uous current of air to the furnace, said twyers being composed of two chambers, whereby a water-space is formed, and being mounted in a casing which is fixed in the walls of the furnace, and which is also provided with a water-chamber, and the walls of the furnace being also provided with triangular casings which fill the spaces between said twyers, and which are provided with means for circulating water therethrough, substantially as shown and described.

2. A blast-furnace constructed as herein described, and provided with twyers which are arranged circumferentially therein, the side walls of the several twyers being parallel, casings or blocks which are triangular in form and which are placed between said twyers, the wider ends thereof being directed outwardly, and means for cooling said casings, substantially as described.

3. A blast-furnace provided with a circumferential row of twyers having parallel side walls which are mounted in spaces between which are placed casings or blocks, said casings or blocks being triangular in form, and provided with means for circulating water therethrough, and cooling the same, and said twyers being also provided with means for circulating water around the same, substantially as described.

In testimony that We claim the foregoing as our invention we have signed our names, in presence of the subscribing witnesses, this 27th day of September, 1897.

EDWARD KELLY. HARRY BENJAMIN \VEAVER.

lVitnesses:

ARJOY Donna, R0121. F. ORAM, Jr.

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