US1031478A - Blast-furnace top. - Google Patents

Description

G. H. SMITH.

BLAST FURNACE TOP.

APPLIOATION FILED APR. 23, 1912.

- Patented July 2, 1912.

2 SHEETS-SHEET 1.

- INVENTOR \MTNEssEs G. H. SMITH.

BLAST FURNACE TOP. APPLICATION TILED APR.23, 1912.

Patented July 2, 1912.

2 SHEETS-SHEET 2.

a a W Q a A Y WITNESSES I g INVENTOR of blast furnaces lates to the construction and arrangement,

* UNITED sTATEs PATENT c ar on. v

GEORGE HAMPTONBHITH, OF ASPIFWALL, PENNSYLVANIA.

nms'r-ruima'cn Tor.

of the filling apparatus used ontop of the furnace :by which the furnace burden is "charged into and distributed in the top. of

hoppers and in the distri necessary in altering or varying the mannercomer (not shown).

the furnace shaft.

In the modern mechanically charged blast furnace it-frequently becomes necessary to change the method or way in which the stock is distributedwithin the furnace on account of irregularities in the working of the furnace. In order to effect this change in distribution it is the practice to substitute' bells and hoppers of one size for bells and hoppers which are larger or smaller and to replace a distributing ring of one diameter with one of a different dlameter. My invention is designed to provide novel means whereby the chan sinthe bells and uting rings found of distributing the charged materials entering the furnaces are facilitated, repairs to the apparatus used in charging and distributing the burden forming materials in the furnace are more easily and quickly accomplished and the time 0st in operating the furnace is greatly lessened.

' Referring to the drawings, Figurel is asect-ional elevation showing the. top of a blast furnace shaft having .char 'ng. apparatus mounted thereon construe and arranged in accordance with my .'nvention. Fig. 2 is a; similar sectional-elevation on an enlarged scale showin a portion of the apparatus illustrated inv ig'. 1.

In the drawings, 2 designates the furnace shaft, which is enlar ed and flares outwardly and then inwar ly at its upper. end, and leading from the enlarged flaring upper end 3 are the gas offtakes 4 by which the gases produced in the operation of thefurnace are led therefrom to the furnace down- An inclined skip track car 6 in 5, which is provided with a and disski which the materials are hoisted charged into the top hopper wardly from the ground e Specification of Letters Patent. Application flied April 28, 1912. Serial No. 892,591.

Alle- 7, leads up-' vel to the topv Patented July 2, 1912.

The skip car 6 is arranged to tilt mechanicall materials hoisted t erein into opper or chute 7.

5 and dum the conical rovided with a throat 8, preferably cylinrical in cross section, and which normall is closed by means of the swinging gas sea ing doors 9 hinged to the lugs 10 on the lower end of the throat 8. Each of the doors 9 is engaged by an anti-friction roller 1.1 on one end of the door operating levers 12 and the ends of the horizontal shafts 13 suspende y a rod 19 from a bell operating mechanism in the usual manner so as to raise and lower the bell 18 in discharging materials from the hopper 16 into the top of the furnace 2:

The flanged top of the hopper 16 is connected with the sides ofthe top hopper or chute 7 by means of thesectiona gas sealing hood 16 and the hopper 16 is mounted upon the conical hopper support 20 secured to the ring 21, the ring 21 being fastened to the upper edge of t e conical to forming the upwardly and inwardly flar extension of the furnace shell 22.

Suspended within the furnace by its flanged upper end from the upper edge of the conical shell 22 of the furnace is a dis tributing ring 24. The distributin ring 24 in Flg. 1 is of a diameter consi erably smaller at its lower end than the inside diameter of the refractory lining 25 in the upper end of the furnace 'shaft 2. In the construction of Fig. 2, the distributing ring 26 (which is substituted for the ring 24 of Fig. 1) is much larger in diameter than the ring 24. The large and small distrlbutlng rings 24 and 26 are interchanged to vary the manner in which the materials will be disone of these rings ell'18 engages with the lower edge. of the hopper extension 17. The bell 18 1s bemg removed and .re-

hopper or chute 7 above the furnace shaft as it reaches the top of the ski car trac The lower, smaller end of the hopper 7 is Y is, lever 15 50 .that the gases are taken from the furnace,

placed by another of different diameter when it is desired to change the distribution of the coarse and fine materials forming the furnace burden as deposited within the top of the furnace. a

- In some cases the hopper extension 17 and 7 bell 18 of Fig. 1 will be replaced by a larger hopper-extension 17 and bell-l8, as shown In Fig. 2, in order to efiect agreater change in the distribution of the stock as charged into the furnace. To facilitate the removal and the replacement of the hopper extensions, bells and distributing rings without disturb ing the gas seal and top hopper, as has heretofore been necessary, the support 20 for the hopperl'fi is made in sections and the gas sealing hood 1,6, which also is made in sections, is suspended from the top hopper 7 which'will be carried by or supported on the superstructure 27 located above the top of the furnace. The bottom hopper 16 is arranged to be suspended, when necessary, from the gas scaling hood 16, and the lower bell 18 which when not removed is suspended so as to be vertically movable, aids in supporting the hopper 16 and gas sealing hood 16 after one or more sections of the conical support 20 are disconnected and removed. The distributing rings 24 and 2%; also are made in sections, of such size as can easily be handled, when disconnected in being removed. Each section can be removed separately from the top of the furnace, be-

. tween the conical top of the furnace and the providing the enlarged upper end of the furnace shaft which is utilized to provide a convenient means for attaching the gas ofitakes 4 to the furnace and enlargesthe area of the furnace shaft at the point therein the enlarged area reducing the velocity of the gases passing out of the furnace so as to prevent or lessenlto'. a large extent the amount of finely divided solids carried from the furnace by theoutgoing gases. By

providing means whereby the bells, hopper.

extensions and distributing rings in the furnace are readily removed and easily replaced changes-in the distribution of the stock in the furnace are readily accomplished without disturbing the top riggingt In testimony whereof, I have her Modifications in the construction of the parts may be made without departing from my invention, as defined in the claims.

I claim 1. In a blast furnace, a closed top furnace comprising a sectional hopper support mounted on the top of the furnace shell,'a charging hopper thereon, a closing bell for said hopper, and a sectional distributing ring suspended from the furnace shell, said distributing ring being removable in sections from the furnace between the hopper and the top of the furnace shell.

2. ln'a blast furnace, a closed top furnace comprising a sectional hopper support mounted on the top of the furnaceshell, a charging hopper thereon having a'detachable sectional hopper extension, a closing bell for said hopper engaging with said hopper extension,- and a sectional distributing ring suspended from the furnace shell, said distributing ring and hopper extension being removable in sections from the furnace between the hopper and the top of the furnace shell.

3. In a blast furnace, a closed topv furnace having an open upper end, a sectional hopper support detachably mounted thereon, a,

charging hopper mounted on and extending downwardly within said support, and a sectional distributing ring suspended from the top of the furnace shell, the hopper being smaller than the opening in the top of the furnace shell to permit the removal and replacement of the sectional distributing ring with the hopper in position on the furnace top.-

4. Ina blast furnace, a closed top furnace comprising an enlarged flaring furnace shell having a metal shell flaring outwardly and then inwardly, a refractory lining therefor,

of the shell, a hopper supported on said furnace shell having a hopper closing bell, a support for said hopper forming a gas seal therefor, and a sectional extension on the hopper, said hopper support being arranged in sections, the sections being removable to permit the insertion and removal of. the

F. A. NICOLL, FREDW. Cnorr.

hopper extension with the hopper supported gas ofi'takes in the inwardly flaring. portion unto set

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