US653110A - Apparatus for feeding stock to furnaces. - Google Patents

Description

N0. 653,ll0. Patented July 3, I900.

- I T. MORRISON.

.APPARATUS FOR FEEDING STOCK TU'FURNACES.

(Application filed Jan. 23, 1899.)

2 Sheets-Sheet (No Model.)

WITNESSES INVENTOR No. 653,110. Patented July 3, I900. T. monmsou.

APPARATUS FOR FEEDING STOCK T0 FURNACES.

(Application filed Jan. 23. 1899.) (No Model.) 2 Sheets-Sheet 2.

WITNESSES INVENTOR THE N'onms PETERS o0. PHQTO-LITNCL. wxsumumu, n. c

UNITED STATES PATENT OFFICE.

THOMAS MORRISON, OF BRADDOOK, PENNSYLVANIA.

APPARATUS FOR FEEDING STOCK TO FURNACES.-

SLPECIFICATION forming part of Letters PatentNo. 653,110, dated J' 11 3, 1900. Application filed January 23, 1899- Serial No. 703,074. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS MORRISON, of Braddock, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Apparatus for Feeding Stock toFurnaces, of which the following'is a full, clear, and exact description, reference being had to the. accompanying drawings, forming part of this specification, in which Figure 1 shows in end elevation a blast-furnace-charging apparatus constructed in accordance with my invention. Fig. 2 is a vertical central section through the top of the blast-furnace and hoppers, showing the op erating levers and one of the cars inside ele- Vation.

My invention relates to improved. means for introducing charges of ore, fuel,and flux as required into the top of a blast-furnace. Its object is to obtain a more uniform dis tribution of the stock than has heretofore been possible by any of the methods in' common use. At present the usual apparatus for charging blast-furnaces comprises a hopper with a conical bell, which closes the opening at its bottom. This apparatus is placed at the top of the furnace and is made gas-tight at the joints. The stock is placedainthe hopper while the opening is closed by the bell, and when the necessary amount of stock has been supplied the bell is lowered and the stock is allowed to slide down its inclined surface into the furnace, s'upplementarybells being sometimes providedto form gas-seals and'the apparatus being provided with closing-doors and other accessory parts familiar to those skilled in the art. It is evident that by this arrangement the stock introduced into the furnace is thrown more or less against the side of the furnace structure, leaving a hollow or depression in the center,where the ascending currents of gas find less resistance and through which they pass more readily than through the portions nearer. the walls. Such inequality of distribution and discharge tends to causeirregular working of the furnace, and it is such irregular distribution, with its attending disadvantages, that I overcome by my invention.

In the'drawings, 2 represents a masonry or stack at the top of a blast-furnace.

3 is the main hopper.

4is the supplemental hopper, situate above the main hopper and connected therewith by a throat 5. This supplemental hopper and the throat,with theirbell and accessory parts,

may be omitted or: other parts substituted therefor without departure from my invention as defined in the broader claims ofthis specification. r

6 is the bell of the supplemental hopper, which closes the opening at the base of the throat 5 and has a vertical tubular stem 7, connected with can operating-lever 8, which is operated bya motor 9, adapting the bell to be movedvertically in order to open or close the opening at the base of the throat.

10 is the skip or' car mounted upon a track ll ofjany suitable constructionand adapted to discharge the stock into the mouth of the hopper at. v p

1 .The bell which closes the opening at the base of the main hopper 3 and which constitutes the lea'ding'feature of my invention is made in two or more sections, the outer sections ors'ection being annular in form. In the drawings I show this bell. constituted of. two such sections-an outer annular section 12, which in cross-section is 7 preferably. of inverted-V shape, so as to defleet the stock fallingithereupon both toward the center and toward its circumference, and a central section 13, preferably conical in form, which fits against the under side of the central opening i of the annular section 12. The annular section thus normally rests upon and is supported by the central section 13 when the parts are in' closed position. The section 13 has an upwardly-projecting stem 14. connected thereto by a link 14 and passing through the. hollow stem 7 of the bell 6. The stem 14 'is operated by suitable means, such as a lever 16 and cylinder 17, swinging links 18 (not of my invention) being preferably interposed to secure parallel motion. The outer section ,12 of .the.be1l.has a suitable number of stems 19, which extend vertically through the cover of the main hopper and are provided at their ends with stops 20, constituted,preferab1y,byadj ustable 'nnts,whi ch at the lowest position of the section 12 (indicated by dotted lines) rest upon stops constituted, preferably, by springs 21, supported by straps 22, depending from beams 23.

When the central section 13 is raised by the lever 16 and supports the outer section 12 in contact with the lower the said annular section resting upon and its central opening being closed by the conical surface of the middle section 13. \Vhen it is desired to open the hopper 3 by lowering its bell, the lever 16 is operated so as to lower the stem 14 and the bell-section 13, which in descending carries with it the outer bell-section 12 until the latter reaches the level shown Up to this point by dotted lines in Fig. 2. in their descent the central openingof the annular section 12 is closed by the central section 13; but when the parts arrive at the level just indicated the stops 20 on the stems 19'of the annular section engage their sp'ringstops 21 and are stopped thereby, so as -to support the annular section 12 and to restrain it from any further down motion. Then as the central section 13 continuesits-descent .j it leaves the annular section 12 suspended by the links and opens the central opening thereof,"as'shown by dotted lines in Fig. 2. In. closing the hopper the central section 13 is. raised by operation of the lever 16 until it reaches 'and'clos'esthe central opening of the ann'ularsection 12, and'as itcontinues its ascent it raises the annular section into contact with the hopper 3, as shown in full lines. Itis evident that by adjustment of the stops 20 the annular section may be caused to move with the central section 13 throughout any desired portionof the vertical travel of the: and the extent of motion of the cencontrollable by varying thelatter, tr'al'section is motion of the'operating-cylinder.

hopper formly the operator lowers the stem 14. The first eiiect of'this is tocausethe entire bell, com prising the sections 12 13, to descend andto. open an annular space between the outer edge 12am the edge 24 of'the hopthrough which a portion of the stock at of the section per, theou'ter part of the hopper3 will drop and will be deflected toward the wall of the fur- .nace. When the parts of the bell reach the lowest position desired for the section 12, this section is suspendedand held from fur therdescent by-the engagement of 'the'stops 2O a n'd 21, "anda's thecen't'ralse'ction '13 'continues to 'descend-itopens the central openstock which is at the middle of the hopper bell of the hopper 3 is closed, the

edge 24: of the main hopper,

ingef'thes'ecticn '12, and the -portion of the will drop through said opening and will be distributed in the furnace at a more central position than that portion of the sto'ck'which is discharged through the annular opening around the section 12. After the stock has thus been discharged into thefurnace the sections of the bell are again raised into the closed position. (Shown by full lines in the drawings.) In case it is desired to use the bell 12 13 as a single bell this can be done by removing the stop 20, so as to permit the section 12 to travel with thesection 13 to the full extent or its movement. The gases pass off through the side off-take, (shown at 25 in Fig. 2.) i

The advantages of my invention have been indicated generally and will be appreciated by those skilled in the art. The apparatus is simple "and e-iiective and secures a 'very good distributionof the-stock inthe furnace.

Within the scope of myi'nvention as herein defined changes may be made in the construction and arrangement of the parts, since What I claim is 1. A blast-furnace having a closedtopa-nd aside gas-olftake, and provided with a feeding apparatus comprising a yertica-lmovablc annular section having an intermediate ridge arranged to split the stook'and'distribute it in the 'form'of a central core and an annular su'rround-ingcore, and a closed-central bell of larger diameter than the opening in the an-- nular section, and seated upwa'rdlyagainst it, and mechanism 'for movingthe'bell downwardly beyond the limit of motion 'ofthesection, substantially-as described.

2. A blast-furnace h'a'ving a closed topand a sidegas-oiitake, a'charging-b'ell comprising an annularsection having an intermediate ridge arranged to split the stock and distribute it in the form of acentralco're and an annular outer core and a central closed section arranged to close the openi-ngof the The main hopper3 receives its charge cf I stock from the throat of the supplemental 4, from which it is discharged uni by lowering the bell 6, and when a. sulficient amountof stock has been-accumua lated in the main hopper 3 and it is desired to discharge thesaine into the 'blast furnace;

annularsection and support the same, means for mo'viiig'the central sectionvertically, and a stop adapted "to'liinit the motionoffthea'nnular section; substantially asdescribe'd.

3. A blast furnace havingaclosed tep 'and a side ga's-oft'take, acharging-bell comprising an'annular section having an intermediate ridge arranged to split the stock and distribute'it in theform of a'centralcoreand'an annular surrounding'core and mused-central section arranged 'to-close the opening-of the annular section and support the same, means for moving the central section vertically, and a spring-stop adapted to limitthe motionof the annular section; substantially as described.

4.. A blast-'furnace-having a closed tepand a'sidez'gas-oftta'ke, a char ging-bell comprising anann'ul'ar section having an intermediate ridgeai'ran'ged-to split thestockand distribute it 'inthe form of a'c'entral' -c'oreand an a'nnular surrounding core and 'aclosedcentral section arranged to close the opening of the IIO annular section and support the same, means for moving the central section vertically, and an adjustable stop adapted to limit the motion of the annular section; substantially as described.

5. A blast-furnace havinga closed top and a side gas-offtake, a charging-bell comprising a movable annular section having an intermediate ridge arranged to split the stock and distribute it in the form of acentral core and an annular surrounding core and a movable closed middle section adapted to close the opening of the annular section and to support the stock; one of said sections being movable downwardly beyond the limit of motion of the other, and means for varying independently the extent of the motions of said sections; substantially as described.

6. A blast-furnace having a closed top and a side gas-oflftake, a main charging-hopper, a bell for said hopper comprising a movable annular section having an intermediate ridge arranged to split the stock and distribute it in the form of a central core and an annular surrounding core and a movable closed middle section adapted to close the opening of the annular'section and to support the stock; a

surrounding core, and a closed central section having a central support and arranged to close the opening in the annular section and support the same, and rods secured to the annular section and extending through the closed cover or top and provided with stops, the central section being movable down- Wardly beyond the limit of motion of the annular section; substantially as described.

In testimony whereof I have hereunto set my hand.

THOMAS MORRISON.

Witnesses:

J. E. MITCHELL, G. E. F. GRAY.

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