US1664832A - Blast furnace - Google Patents

Description

'BLAST FURNACE Filed Jan; 20. I927 w. P, POWER ET Ax.

April 3, 1928.

Patented A 3, 1928'.

ITED STATES. PATENT orrice.

WILLIAM PATRICK POWER, OF NEWCASTLE, NEW SOUTH WALES, AND ESSINGTON LEWIS, F MALVEBN, VICTORIA, AUSTRALIA, ASSIGNORS TO THE BROKEN HILL PROZPRIETARY COMPANY, LIMITED,

A CORPORATION, OF VICTORIA, AUSTRALIA.

BLAST runnao ny Application filed'J'anuary 20, 1927, Serial No. 162,265, and in Australia December 9, 1926.

This invention relates to improvements in blast furnaces and refers moreespecially to blast furnaces for the smelting of iron ores.

Thebrickwork lining of blast furnaces is subject to Considerable wear due to attrition from the ore and other materials passing downwards and this wear is usually more acute at the top or u per part of the furnace usually known as t e shaft; With a view to avoiding this wear it has been customary to provide armor plating arranged upon the inside of the brickwork at the top or upper part of the furnace.

This armor plating has previously been supported either by being hung from the top,

' in'which case the lining itself carries no portion of the weight, or by being built into the top lining, in which case the armor, plating in addition to the weight of the top lining itselfis supported by the lower lining of the furnace.

This armor plating applied to the top brickwork of the furnace in ordinary blast furnaces for smelting of iron ores requires the use of some sixteen tons or more of steel plates and it has been found that'in the lat- .ter case this additional weight carried upon the brickwork of the tendency to make the brickwork of the mantle bulge especially when the same is subject to the softening effect of the high temperatures which exist in that part of the furnace.

Consequently in practice it has been found that renewal of the brickwork is required more frequently at the lower part of the fur- 'nace than at the top, and when such re-lining is being effected it has been necessary to practically dismantle the whole of the furnace, causing the same to be out of commis- 40 sion for a considerable period.

. Now the object of this invention is to provide means whereby one portion of the brickwork lining may be removed and renewed without affecting the other part or parts and also means for supporting the armor plating at the top of the furnace independently of the lower lining.

We accomplish these objects by forming the lining within the furnace shell of two or more (preferably three) independentparts and providing supporting means for the top portion of the lining connected to the shellof the furnace.

With this arrangement most of the wear weight of this furnace alone has a on the furnace lining takes place in or about the region of the melting Zone, that is to say within the mantle or lower part of the inwall, and a great saving may be effected both in time and material by having the top lining supported independently of the rest of the lining, allowing of the removal and replacement or renewal ofthe lower brickwork without disturbing the top portion of the lining whilst furthermore by eliminating the crushing load upon the brickwork or lower mantle of the furnace a longer life thereof is ensured.

Referring to the drawings, which illustrate merely by way of example a suitable embodiment of the invention:

Figure 1 is a vertical section.

Figure 2 is ahorizontal section on the line 2 2 of- Figure 1.

, Figure 3 is a horizontal section on the line 3-3 of Figure 1.

Figure/l is avvertical section on the line H of Figure 3 on an enlarged scale.

Figure 5 is a View in perspective of an armor plate element'same scale as Figure 4. Similar numerals refer to simll'ar parts throughout the several views.

The furnace comprises an outside metallic shell 6 having an inner lining of brickwork. This inner lining is formed in sections .(preferably three) which are independently supported, that is to say, the belly or centre portion 7, the upper in-wall 8 and the bosh or lower portion-9.

The lining in the'bosh 9 'is supported on the foundations ofthe furnace, the belly or centre portion 7 is supported on the columns 10 whilst theupper in-wall 8 is supported on "a series of brackets 11 arranged around and attached to the outer shell 6 of the furnace. By means of'this arrangement these three sections are independently supportedbe removedfor repair or renewal and may purposes independently of each other, thereby effecting a considerable saving in time and laborl, r Y

The upper in-wall 8 is provided with a series of armor plates 12 for the pur ose of protecting the same fIOII l ,We l1 from t 1e passage of the raw materials fed in at the top of the furnace. These armor plate's 12 are preferably shaped as shown in Figure 5 having downwardly projecting flanges 13 on their inner ends and upwardly projecting "riod without the danger thatthe weight' flanges 14: on their outer ends or vice versa. These plates 12 are arranged radially and are embedded entirely in the brickwork of the lining except the exposed flanges 13 and are arranged with relation to eachother with the flanges 13in substantial contact with the adjacent flanges on each side and above and below so that the assembled flanges 13 form a practically continuous'metallic wall or armor for the lining of the upper l11-Wtll 8.

The top lining or irrwall 8 together with c the an moi plates 12 is superimposed upen an annular plate 15 having annular angle iron rings 16 and 17 which areboltcd or other-- wise secured to the series of brackets 11.

These brackets 11 are bolted or otherwise sccured to the outer shell 6 of the furnace.

The angle ircn rings 16 and ll-and the brackets 11 are preferably embedded in the above will crush or weaken the lining below,

whilst furthermore the lining in the belly of the furnace or in the bosh as the case may be may be torn out and repaired or renewed without disturbing the top lining.

We claim:

1. lln a blast furnace, the'combination with i an upper lining of meansfor supporting the an upper lining having armor platingof means for supporting the same connected to the outer shell independently of the lower lining. v p v 3. In a blast furnace, the combination with the furnace of a top lining and a. lower lining, and a series of brackets securec to the shell for supporting the top'lining.

4. In a blast furnace, the combination with the furnace shell of a top lining and a lower lining, and a series of brackets secured to the shell and a ring plate for supporting the top lining.

5-. In a blast furnace, the combination with the furnace shell of a top lining and a lowerlining and a series of brackets secured to the shell and a ring plate and angle rings for supporting the top lining.

In witness whereof we hereunto aliix ou signatures.

WILLIAM rArnioK rowan.

ESSINGTQN LEWIS.

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