US1066225A - Furnace-top. - Google Patents

Description

Patented July. .1, .1913

FURNAGE TOP'.

APPLICATION FILED JAN. s1, 1913'. l

F. IC. ROBERTS & A. BRODEN.

777257)? #frans/EX FRANK c. ROBERTS, or" WYNNEwoonAND ALBERT BRODEN, onEADING,

PENNSYLVANIA.

rURNAon-Tor.

Be it known that we, FRANK CJROBERTS, a citizen of the United States, residing at l/Vynnewood, county of Montgomery, Vand Stat/e of Pennsylvania, and ALBERT BRoDnN, a citizen of the United States, residing at Reading, State of Pennsylvania, have invented certain -new and useful Improvements in Furnace-Tops', of which the following is a specilication. The object o! our invention is to provide a furnace` top structure which will be durable, economical and efficient.

One source of trouble in blastfurnaces has been the wearing away of t-he lining of the furnace above the stock line by thestriking of the charge against the furnace lining as it comes from the bell of the hopper. The furnace lining above the stock line is open to the effects of the heat and the gases. More or less of the charge entering the furnace, after leaving the bell, strikes the-lining with enough force to cause-thelining to wear at this point and a result is that the furnace linino, instead of Wearing uniformly throughout thedieight of the stack, is abraded and destroyed near the top. The present invention obviates this defect by discontinuing the masonry lining of the furnace at a point somewhat below the place where the wear normally comes from the incoming charge striking 'against the lining.

. Above the shortened masonry lining is provided a lining of a more durable material, preferably iron or steel.. The upper metallic lining is supported independently of the masonry lining and the junction between the twb linings is so' arranged that provision is made for independent and separate contraction and expansion under varying' conditions of temperature for the two linings. The upper lining may be cooled by piercing the outer shell of the furnace and passing a draft of air about the upper lining or wa- 'or contract with variance of temperature Specification of Letters Patent. Application meu January a1, 1913. i serial No. 745,413.'

hopper.

Patented July 1, i913.

UNiTED STATES PATENT ormoni.. f

without being influenced or restrained by the It will be seen then that we have provided i' a furnace having a separate and'independent lmlng at the upper portion where the mechanical wear comes, which is of durable material and which is ca able of bei cooled and preserved and w ich, because'o its separate character, may be renewed orv replaced without the expense or delay incidentto a complete relining of the furnace.

In the accompanyin tion is shown in one orm it may take applied to a blast furnace as used for the re'- duction of iron l or other ores.'

Figure 1 is a transverse, vertical section of the upper art of a furnace; Fig. 2 is a section of a ragment of the metal lining taken at approximately right angles to. Fig.. 1=. We have shown the furnace provided with the usual metallic sheath 1 within which is the masonryI lining 2. It does not extend to the top of the furnace and may be provided as shown with an irregularly formed top line. Above the masonry wall, in the pres-v ent instance, is an annular bracket 3 riveted or otherwise attached to the furnace sheath on which rests an inwardly springing trough 9 which receives the flange ofthe li-p 5 of the metallic lining 4. i The metallic lining 4 drawing the invenis thus supported from the furnace sheath above the upper end of the masonry lining, and out of contact therewith, so that the Amasonry lining inay expand and contract with variations of temperature in the furnace without being impeded by the metallic lining above it, The metallic lining shown 'in the drawing consists of two parts although this is not essential. The lower.'

portion or lip 5 extends downwardly within v an outlet 1:2 to the relief valve and about its surface is provided with ribs 13 which in addition to strengthening the structure, form troughs to hold water or other cooling medium. The Water may be let into the troughs through the pipe Alet and overoiv from one trough to another or a series of pipes l5 maybe provided which spray the coolingmedium onto the surface of the metallic lining, ,Y Openings 1G may be provided 'in the outer shell of the furnace adjacent the metallic lining through which a current of air may be forced or drawn for cooling the lining. The particular means used for cooling the lining is not essential to the present invention and it is obvious that one or more of the specific means described might be omitted. The linin@ is connected at its top with the outer shell1 or sheath by a thin annular plate 17 which forms a vgas seal between the lining and the sliell and which is thin. enough to allow by its deformation for independent expansion and contraction of the metallic lining.

Above the metallic lining and independently supported, either from the sheath or from the usual superstructure, is a charging device shownI in the present instance as a hopper 1S provided with a bell 19.

It will be seen that the charge on entering the furnace will strike against the sides of the metallic lining as it leaves the bell and that the wearing due to this impact will be entirely on the metallic lining. The masonry lining ending below this point of impact is protected from the wear. The furnace is so constructed that the masonry lining. is free to contract and expand independently. This construction affords at the/various points in the furnace the most durable, devices for thevneeds of the furnace at 'each point. It is possible without interfering with the masonry lining to remoye and ref place the metallic lining should it/be destroyed where it receives the greatest wear.

We claim as our invention: i j

1. In a furnace, a sheath, a masonry lining extendingpart way up the sheath, a metal lining supported by the sheath above the masonry and extending therebelow, means for cooling the metal lining, an independently supported hopper above themetal lining, a junction seal between the linings, and a gas seal between the metal lining and the sheath. f

2. In a furnace, a sheath, a masonry 1ining extending part way up the sheath, a metal lining supported by the sheathv above the masonry lining land'not in contact therewith, means for passing a current'of air through the chamber between the sheath and metal lining, a Water cooling device for the metal lining, a gas seal between the sheath and the metal lining, a lip attached to thel metal lining and extending into the masonry 'lining and forming a junction seal therewith, a walter cooling device` for the lip, and

independently supported hopper above the metal lining.

3. In a furnace, a masonry lining, a` chargi ing device,- a metal lining between the masonry lining and the charging device supported independently of them, and means j ing extending part way up the sheath, a

metal lining supported by the sheath above the masonry, means for cooling the metal lining, an independently supported hopper above the metal linin a. junction sealbetween the linings, an a gas seal 'between' the metal lining and the sheatlr..

6. In a furnace, a masonry lining, a charging device, a metall lining betweenthe masonry lining and the charging device supported independently of them, and means for allowing independent expansion land contraction of the masonry and metal 1inings. 1

7. In a'furnace, a masonry lining, an independently supported metal lining thereabove, a junction seal between the linings, and an independently supported4 charging devi-ce above the metal lining.

Y8. In a furnace, a sheath, a masonry .lin'f ing extending part way `up the sheath, a metal/'lining supported by the sheath above r.the masonry lining and not in contacttherewith, a water cooling device for the metal lining, a gas seal between the sheath and fthe metal lining, a lip attached to the metal lining and extending into the masonry lining and forming a junction seal therewith, `and an independently supported hopper above the metal lining.

9. In a furnace, a masonry lining, an independcntly supported meta/l lining thereabove,

-charging device above the linings.

10. In a furnace, a masonry lining, a:

charging device, and a metal lining between theimasonry lining and the charging device supported independently of them.

11. In a furnace, a masonry lining, an independently supported metall lining thereabove, an' independently supported charging device above the linings, gas. seals betweeny the various elements, means for cooling the metal lining, and means for allowing indetpendent expansion ofthe linings..

l 12. In a furnace, a sheath, a masonry lining extending partgwa' up1 the slte'ath, a metal lining supported by t e sheath above the masonry lining and not in contact therewith, means for passing a current. of air andY an independently supportedA through the chamber between the sheath and Signed at Philadelphia this 29th day of metal lining, n gas seal between the `-sheath January, 1913. i

and the metal lining, a lip attached to the FRANK C, ROBERTS. metal lining nml extending into the masonry .A ALBERT BRODEN lining,` 1nd 'forming n junction s-el therelVitnesSeS: Witln and an indepenclentlynsupportecl hop- J. DONLDSON BAXTON, per above the metal lining. CLARENC S. BUTLER.

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