US2554836A - Skimming device for bessemer converters, large ladles, and the like - Google Patents

Description

May 29, 1951 H. L. MGFEATERS 2,554,836

SKIMMING DEVICE FOR BESSEMER CONVERTERS,

LARGE LADLES AND'THE LIKE Filed May 14, 1948 4 Sheets-Sheet 1 IN VEN TOR. I Harry L. Mc Feafers May 29, 1951 H. L. MCFEATERS 3 2,5

SKIMMING DEVICE FOR BESSEMER CONVERTERS,

LARGE LADLES AND THE LIKE 4 Sheets-Sheet 2 Filed May 14, 1948 5 JNVENTOR.

Harry L. Ma Feafers May 29, 1951 H. L. MCFEATERS SKIMMING DEVICE FOR BESSEMER CONVERTERS LARGE LADLES AND THE LIKE 4 Sheets-Sheet 3 Filed May 14, 1948 INVENTOR. Harry L. Me Featers 0m mm y 1951 H. MCFEATERS 2,554,836

- SKIMMING DEVICE FOR BESSEMER CONVERTERS,

LARGE LADLES AND .THE LIKE Filed May 14, 1948 4 She'ets-Sheet 4 IN VEN TOR. Harry L. Ma Feafers i atented May 29, 1951 UNITED. sIATELs SK-IMMING DEVICE FOR BESSEMER CON- VERTERS, LARGETLADLES AND THE LIKE Harry"'-L. McFeaters; New Castl'e,-- P211, assignortm Pennsylvania--Enginecring Corporation; a corporation of Pennsylvania Application,Mayi'I4, 1948, Serial No. 27,078

Thisinventionrelates toslag skimmer-s for tiltable Bessemer converters: and large illtable ladles or the like and-arr object of this inven--- tion is to produce animpro'ved' slag skimmerfor-such vessels.

Another object isto produce an" improved wa-- ter cooled slag skimmer for -ti-lta-ble- Bessemer" converters, large tiltableladles'and the like.

Another object isto produce an-improvecl: hy-

draulically operated slagskimmer for tiltable Bessemer converters, ladles and the like:

A still further object" is to produce an improved hydraulica'lly operated water cooled slag skimmer for 'tiltableBessemer converters; ladies and the like. 7

A still further object is-tdproducean improved water cooledslag-skimmer' for tiltable- Bessemer converters, thatcarr be operated at a safe distancefrom the converter.

These and other ob'jectswhiclr will be appaient to those skilled in this particular-art, I attain by means of the structuresdescribed in the specification and illustrated in the drawings accompanying and forming part of thisappli cation.

In the drawings: I Figure 1 is a:- view mainly in sideelevation of a tiltable Bessemer-converter equipped with a slag skimmer embodying this' -inve'ntion and" this view shows the skim'm'er in operation dur ing pouring of the-molten -metal'from the converter to a ladle;

Fig; 2' is a view similar'to-Figure l of-the con-' verter and shows the skimmer hold-ing'backthe slag after all of the molten metal has-beenpoured Fig; 3'isa view similar-to Figs. 1 and-2 i theconverter in upright or blowing-position: Thisview shows the skimmer'member movedto posi tion: outside of the converter;

Figs: 4 and 5 areoutside el'evational viewsof the converter upright position and these views-show the position of'the skimmer and its operating mechanisms when the skimmeris not in use; i

Fig. 6 is a V-lewpartially in eleva-tibm and par tially in: section looking toward the-'- mouth of the :converter when the a converter is in the posi- 6 Claims. (Cl. 266%37) tion showm in: Fig: 2 andxiiscloses the skimmer support means, the water cooli'ng'system andthe; piping: for. the hydraulicskimmer I operat ing; devices;

Figs] and.8 are sectionalLdetaik views oe ans of; the; skimmer mechanism; Fig. 8 being takenon 1ine:VIII- VI=II of 6;:

ATENT orrrce:

Fig. 9, is a top sectional view of the skimmer and that part of its" support mechanism to which it is-rigidly' attached;

Fig; 10 isan elevational-view of the mecha-- nism for swinging the support frame and skimmer toward-"a-nd from the mouthof the converter:

Fig: 11 is an elevationalview of-the mechanism for adjusting theposition of" the skimmerwith relation" to the level 'ofthemetal content of the converter;

Figs 12 isa sectional view taken on line Ifl-I-XII of Fig. 11;

Fig; 13" is a sectional view taken on line" Fig? 14 is a sectional View taken on line XIV-'-XI'VOf Fig. 10; and

Fig: 15-is-a diagrammatic view of the hydraulicsystem which forms a part of theskimmer mechanism.

The device of-this inventionis carried by and becomes part of the converter'in connection with which itis to be used and comprises a skimmer on slag hold-back blade or member; means formounting the same for swinging movement into and from the mouth ofthe con-- verter; means for adjusting the skimmer mem ber-withrelation to the-level of the metal contentof the converter, means for circulating-cooling water-through theskimmer; and control valves by means of which the device is operated.

Two pads 20- and 2| secured to the shell of the nose of the converter adjacent the converter mouth are each provided with an outwardly extending boss 22. Within the boss of pad 20 a'stub shaft-23 is rigidly secured while a stub shaft 24 is rigidly secured within the boss of pad 2|. These stub shafts for-m supports upon which side members 255 and 25 of the mounting means for the skimmer member ofthe device are: mounted for swinging movement.

The skimmer membelwwhich is numbered '21,

is made of suitable metal, is hollow, and by means-of 'tubul'irrconnecting members 28 and -29 is joined to a tubular member-BU-which connects the outer ends of sidemembers 2'5 andZfi.

Side members 25- and 26 in conjunction with tubular connecting member-3Q constitute a supporting frame for skimmerfi, and such frame is pivotally connected totheconverter by means of stub shafts 23' 'and- 24.

The openings inside members 25 and 26 for receivingthe stub shafts are provided with suitable bearing bushings 3 l A: gear 32 is mounted on and secured to atubular portion 33 which extends laterally from side member 25 and surrounds a tubular extension of bushing 3 I. An annular member 34 serves as an abutment member and is secured to shaft 23 by means of a wedge key 35 which is driven into a hole formed for its reception adjacent the end of such shaft 23. A bearing washer 34a is mounted on shaft 23 between abutment member 34 and the adjacent end of gear 32. A washer 36 on shaft 24 is held in place by means of a wedge key 3'! which is driven into a hole formed for its reception in shaft 24.

Tubular end member 30 of the support frame is built up at its ends by sleeves 38 which are preferably welded in place as shown at 39 in Fig. 7; this being an enlarged view of the end at the right side of Fig. 6.

These thickened ends of member 36 are journaled within bearing bushings 46 secured within openings in the outer ends of side members 25 and 26.

Sleeve 38 at the right-hand side of Fig. 6 has a gear 4| keyed thereto and a nut 42 threaded to such sleeve as at 43 prevents key 44 from working out of its slot in gear 4|.

The frame which supports skimmer member 21 and which is mounted for swinging movement about stub shafts 23 and 24, is swung, in carrying the skimmer member into and from the mouth of the converter, by the hydraulically operated mechanism of Figs. 10, 13 and 14.

This mechanism comprises an hydraulic cylinder 45 carried by pads 46 and 41 secured to the converter shell between one of the converter trunnions 48 and the converter mouth. Cylinder 45 contains a piston 49 (Fig. to which a piston rod 50 is attached. A rack 5| carried by piston rod 56 meshes with gear 32 and is therefore adapted, as it is reciprocated, to swing the skimmer support frame about stub shafts 23 and 24 into and from operative position.

Tubular member 36 which is provided with hollow branches 28 and 29 to the outer ends of which skimmer member 21 is secured, as before pointed out, is mounted for rotation with relation to frame side members 25 and 2B and carries gear 4| which is keyed to one of its sleeves 38. Tubular member 30 is rotated in order to adjust the position of skimmer member 21 with relation to the level of the metal content of the converter during pouring operations and such rotation, and therefore such adjustments, are obtained by means of the hydraulically operated mechanism disclosed in Figs. 11 and 12.

This mechanism comprises an hydraulic cylinder 52 which is carried by brackets 53secured to side member 26 of the skimmer member mounting frame. Cylinder 52 contains a piston 54 (Fig. 15) to which a piston rod 55 is attached. A rack 56 carried by piston rod 55 meshes with gear 4| and is therefore adapted, as it is reciprocated, to rotate tubular member 30 to adjust the position of the skimmer member 21 with relation to the level of the metal content of the converter during pouring operations, as before pointed out.

Cylinders 45 and 52 are under the control of four- way valves 57 and 58 respectively.

Oil under pressure is supplied to cylinders 45 and 52 by a pump 59 driven by a motor 68. A tank 6| receives the oil discharged from cylinders 45 and 52 and pump 59 draws its supply of oil from tank 6| through line 6| a. The lines between valve 51 and the opposite ends of cylinder 45 are numbered 62 and 63 while those between valve 58 and the opposite ends of cylinder 52 are numbered 64 and 65. The lines between valves 51 and 58 returning oil to tank 6| are numbered 66 and the pressure lines between pump 59 and valves 51 and 58 are numbered 61.

If desired, pump 59 instead of discharging directly into lines 6! may discharge into a pressure tank or an accumulator and one or the other of these as the case may be, under the control of valves 51 and 58, would discharge to pressure line 61. A starter switch for motor 60 may be under the control of valves 51 and 58 or, if a pressure tank is employed, a pressure responsive Switch may be used to operate the motor when the pressure therein falls below a predetermined point.

Lines 64 and 65, in line with the axes of stub shafts 23 and 24 and also in line with the axes of trunnions 48 of the converter are provided with swivel joints 69 of any desired type. Ball bearing swivel joints such as made by Chiksan Company, Brea, California, and Barco Swivel Joints manufactured by Barco Mfg. Company of Chicago, 111., have been found satisfactory.

Lines 62 and 63, in line with the axes of trunnions 48 of the converter are provided with swivel joints 10 similar to joints 69.

During operation of the converter, as well as during pouring, cooling water is circulated through skimmer member 21 and tubular support 30 by means of inlet piping II and exhaust piping l2. Inlet piping 1| connects with a suitable source of supply (not shown) of cooling liquid, such as cooling water. The inlet piping includes a length of pipe 13 which parallels side member 25 of the support frame for the skimmer, and is rigidly attached thereto by a brace 14. At one end pipe 13 is provided with a swivel joint 15 which connects it with the interior of tubular member 36 and at its opposite end it is provided with a swivel joint 16 in line with the axes of stub shafts 23 and 24. This piping also includes a section of pipe ll which is connected to pipe 1| by means of a swivel joint 18 which is in line with the axes of trunnions 48 of the converter. Outlet piping 12 includes a section of pipe 19 similar to section 13 of the inlet piping and this by a brace 14 is rigidly connected to swing with frame side member 26. This section 13 isalso supplied with swivel joints at its opposite ends.

The outlet pipin also includes a section similar to section 11 which is also equipped with swivel joints at its ends in line with the axes of stub shafts 22 and 23 and the axes of the converter trunnions 48.

The piping for conveying pressure fluid to and from cylinders 45 and 52, as well as water inlet and outlet piping 1| and 72 which parallels the support columns of the converter, as shown in Fig. 6, is secured to such columns by bracing members 8|. These members hold in position the stationary portions of the swivel joints that are in line with the axes of the converter trunnions 48.

What I claim is:

l. A slag skimmer or hold-back device for mounting on and use with a tiltable Bessemer converter; such device comprising a slag skimmer or hold-back member, mounting means for such member adapted to be pivotally connected to the converter shell adjacent the converter mouth, remotely controlled means for swinging such mounting means to move such skimmer member into and from the converter mouth, and remotely 76 controlled means carried by such mounting means for adjusting the position of such skimmer member with relation to the level of the metal content of the converter during pouring.

2. A slag skimmer or hold-back device for mounting on and use with a tiltable Bessemer converter; such device comprising a hollow skimmer member, mounting means for such member adapted to be pivotally connected to the converter shell adjacent the converter mouth, remotely controlled means for swingin such mounting means to move such skimmer mem ber into and from the converter mouth, remotely controlled means for adjusting the position of such skimmer member with relation to the level of the metal content of the converter during pouring, and means for circulating cooling liquid through such skimmer member.

3. A sla skimmer or hold-back device for mounting on and use with a tiltable Bessemer converter; such device comprising a water cooled skimmer member, a mountin frame for such member adapted to be pivoted to the converter adjacent its mouth, remotely controlled fluid actuated means for swinging such mounting frame to move such skimmer member into and from the converter mouth, and remotely controlled fiuid actuated means carried by such mounting means for adjusting the position of such skimmer member with relation to the level of the metal content of the converter during pouring.

4. A slag skimmer or hold-back device for mountin on and use with a tiltable Bessemer converter; such device comprising a hollow skimmer member, a, support frame for such member including side members adapted to be pivotally connected to the converter shell adjacent the converter mouth, hollow means carried by such side members, rotatable with relation thereto and connecting with the interior of such skimmer member, means for circulating cooling liquid through such hollow means and such skimmer member, remotely controlled means for swinging such support frame to move such skimmer member into and from the converter mouth, and remotely controlled means carried by such mounting frame for adjusting the position of such skimmer member with relation to the level of the metal content of the converter during pouring.

5. A slag skimmer or hold-back device for mounting on and use with a tiltable Bessemer converter; such device comprisin a hollow skimmer member, a support frame for such skimmer member including side members adapted to be pivotally connected to the converter shell adjacent the converter mouth and tubular means carried by such side members, rotatable with relation thereto and having its interior connected with the interior of such skimmer member, remotely controlled means including an hydraulic cylinder for swinging such frame to move such skimmer member into and from the converter mouth, and remotely controlled means including an hydraulic cylinder carried by one of such side members for adjusting the position of such skimmer member with relation to the level of the metal content of the converter during pouring.

6. A slag skimmer or hold-back device for mounting on and use with a tiltable Bessemer converter; such device comprisin a hollow skimmer member, a support frame for such member comprising side members adapted to be pivotally connected to the converter shell adjacent the converter mouth and a tubular end member carried by such side members, mounted for rotation with relation thereto and having branches which carry such skimmer member and connect the interior of such member to the interiorof such tubular member, remotely controlled fluid actuated means for swinging such frame to move such end member to and from a position in front of the converter mouth with such skimmer member within the converter mouth, remotely controlled fluid actuated means carried by such support frame for adjusting the position of such skimmer member with relation to the level of the metal content of the converter during pouring, and means for flowing cooling water through such tubular end member, through its branches and through such skimmer member.

HARRY L. MCF'EATERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,796,871 Madorsky Mar. 17, 1931 1,827,504 Anderson Oct. 13, 1931 2,042,037 Camerota May 26, 1936

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