DE2030944A1 - Crucible or converter, which has a water cooling of the sheet metal jacket - Google Patents

Description

Patent attorneys
Dipl. Ing. Walter Meissner _{) r} .

Dipl. Ing-Herbert Tischer

Munich office ^

Munich 2, Ta! 71

2030944 Munich

purified Austrian iron and steelworks _Akti narrow se 11 scholarship in linz (Austria)

Crucible or converter, which has a water cooling of the sheet metal jacket

Me invention relates to a crucible or converter with a refractory lined sheet metal jacket, which can be tilted in a support ring provided with two pegs is stored, wherein the preferably conical upper part (hat) of the crucible has a water cooling.

The top of a crucible or converter, in particular an oxygen inflation converter, is one special exposed to high levels of heat. The ones that occur on the upper part are higher than those of the other parts of the converter Temperatures result from the combustion of the CO-containing prischgases emerging from the converter mouth with air, from the obstruction of the heat dissipation through the sheet metal jacket at times adhering slag, from the heat reflection of the over the converter arranged breath gas chimney as well as by radiation

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during the tapping, with the leaking into the ladle Steel beam heats the sheet metal jacket on one side. It can happen, that towards the end of a converter trip the upper part of the sheet metal jacket, the hat, is glowing red. As a result of this bean's Stress results in strong deformations of the sheet metal jacket, which make it very difficult to reline with a refractory lining severe, sometimes even result in destruction of the hat.

Efforts are therefore made to cool the converter hat to avoid overheating and the adverse phenomena that result from it.

Several proposals are known which deal with the Concerning the cooling of a converter hat »An attempt was made to use several closed cooling boxes through which cooling water flowed or pockets on the upper part of the converter jacket. A full concern of these cooling elements on the sheet metal jacket could however, could not be achieved, so that there was an air gap between the hat and the cooling bags, which the cooling effect very severely disabled; Sufficient cooling could not be achieved in this way. It has also been suggested to weld on the converter jacket ring-shaped water pipes that are flowed through by pressurized cooling water® This means that a satisfactory cooling of the hat can be achieved, but with the many necessary welded connections there is a risk of weld seam cracks «, Ea can therefore occur that leaks occur through which the water penetrates into the crucible, which leads to the destruction of the refractory lining can lead. When large amounts of cooling water under pressure penetrate the inside of the converter and come into contact with molten steel and slag, it can lead to calorific gas explosions come.

Finally, there is a hat cooling with a © m at the mouth of the crucible

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arranged, closed ring known through which the. Water is sprayed through several nozzles against the crucible jacket, from where it flows freely downwards into a collecting cup arranged below the crucible. This is how a Sufficient cooling achieved, but only in the vertical position, i.e. H. in the blowing position of the crucible; during the Sampling, measuring the temperature of the steel bath, 'des The cooling water must be turned off for sloping and racking. There is another disadvantage of this cooling system in that the water running down freely over the sheet metal jacket during the fresh process is ejected from the crucible Slag can collide, thus reducing the risk of Explosions and a hazard to the operating crew.

The purpose of the invention is to create a simple and reliable cooling system for the upper part of crucibles or converters, with the aid of which the disadvantages of the known devices are avoided. The sheet metal jacket should be washed directly by the water and the cooling effect should be functional in every position of the fresh vessel. The sheet metal jacket should not be under water pressure so that sudden penetration of water into the interior of the crucible is not possible when hoisting. The hat should not be locally hindered when it is stretched by the pressure of the refractory lining when it is heated; local stress peaks in the material should be avoided. The crucible to a smooth contour aufwei- _(sen so that outgoing slag or steel can not start outside Finally, the entire cooling system to be insensitive Impurities in the cooling water;.. A meeting of water with liquid slag or steel must not occur these goals To achieve, the invention is based on the object on the one hand to cover the cooling system to the outside, but on the other hand not to provide a closed cooling space in which a vapor pressure builds up or completely

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can be filled with water. Further it is necessary .that the "surface of the sheet metal jacket is exposed to the water as evenly as possible, so that there are no dead flow angles occur. and the cooling effect is uniform.

These tasks and promotions are achieved in a crucible or converter of the type defined in that the upper part is surrounded by a hood-shaped cooling jacket that is closed at the bottom and at the top, with water supply pipes in the space between the cooling jacket and the crucible jacket, which is in communication with the outside air, which is necessary for the Supply of cooling water to a plurality of evenly distributed points of the crucible jacket are determined and that from the space Place pipes between the cooling jacket and the crucible jacket to allow the cooling water to flow freely to the outside.

According to an expedient embodiment, the The ends of the water drainage pipes extending from the space between the cooling jacket and the crucible jacket at different heights in relation to each other on the horizontal plane laid by the tilting axis of the crucible, so that the cooling water can run off freely in every tilted position of the crucible can.

A ring line is preferably installed in the lower part of the hood-shaped cooling jacket, with several different lengths, approximately parallel to the generators of the sheet metal jacket adjacent pipes is connected, welohe pipes at the upper end an outflow opening with a baffle each for the distribution of the cooling water over the largest possible area. Four drainage pipes can advantageously be arranged be, of which a pair opens into the bottom of the hood part and the other pair led to the upper end of the Bleohmantels is, depending on the tilting position of the crucible the end of each outlet pipe is at the deepest point for sucking off the collecting water.

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• I.

Ea it is advisable that shut-offs * organs are arranged by a tilting drive of the! Siegele cooperating copier mechanism holder operated are »so that in an upright or approximately horizontal crucible position one of the two ends in the bottom of the hood part- ' the drain pipes and, in a position tilted by about 180 °, one of the drain pipes reaching to the upper end of the Bleohmantels is opened, while the remaining drain lines remain closed.

Ve iters it is advisable that the drilling for the ² U and drainage of the cooling water are laid within the support ring and the pegs of the crucible *

According to a preferred embodiment, the drainage pipes open into a common drilling line which has a a water-air mixture sucking pump is connected, whereby The lines and the pump are dimensioned and designed so that the suction power is greater than that suggested Waeaer quantity.

Be

ftpiel in ed. 1 e direction of a (kaleohnl cones ad » • oheaatli oh

■ ohiedtn of the systdm

Erfindungsgegenetand 1st at a Ausfülirung · illustrates both appended Zeiohnung} it segregate NEN Tertlkalsehnltt Duroi AEEN Ti · gel with dtr Küh.einfür the hat} Pig, 2 a Jttgioht dee KUhlsyetems on the right) half of the mirror · ι Hg "3 a Yertit by dlt Kühlwaestrsuu and «-abfuhr duroh den! Titgele. In Hg, 4 | * up to 4 d is the seal

shown by the tilting plane cut in vern positions, whereby the Wdrkungaweli * is explained in more detail.!

Tig »1 let ait 1 the crucible contains * the one fireproof« outer clothing 2 and one from the ropes 3, 4 » 5

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ORIGINAL IiNlSPECTEO

has standing bleohmantel. The hat 3 is the most stressed part of the sheet metal jacket. A plate 6 is welded to the upper band of the hat 3, on which a Hing 6 'for the support of the masonry 2 is attached. On the cylindrical Part 4 of the Bleohmantle are bearing eyes * 7 attached »in the Engage the support jacks 8 of the support ring 9! whereby the crucible 1 is connected to the support ring 9. On the support ring are those Pin 10, II attached "which are stored in the crucible bearings 12, 13 which are attached to the stands 14" 15 "on Pin 11, a gear 16 is mounted, which cooperates with a gear and a drive for tilting the crucible 1,

Around the upper part of the crucible (consisting of the butt 3 and the upper part of the cylindrical jacket part 4) is placed a hood-shaped cooling jacket 18 that is closed up and downwards, which is everywhere at approximately the same distance from the titanium jacket. is "The hook-shaped cooling jacket consists au" a "portion 19 'which is fixedly connected to the ELansoh 6 _t whereby the termination is geβchaffen upward, and the taasenförmieen part 20 which is veraohweißt above the support ring 9 with the cylindrical Äantelteil 4 · Interim the Taeeenförmigtn part 20 and the roof-shaped part 19 is a Hingleitung 21 Tovgssehen »

which are welded to the two parts mentioned

' ' is. Tfon of the accompaniment 21 lead a number next to each other » arranged approximately parallel to the Eraeugenden of the hat part 3 pay 22, 23 »24 in the space between the cooling jacket 19 uno Tiegelaantel 3 »4» where this drill »like from Pig. 2 shows tin · .have different lengths * at the end of the tubes are Leitbleohe 25 · provided. Waeser-is made of the pipes against the Titgtlmantel geapritst »whereby the mouth points of the drill so are distributed so that uniform cooling of the crucible jacket is achieved is achieved. Mese water jets are denoted by 31. Bas Water flows freely downwards along the hat part 3 into the * ' Cup-shaped or trough-shaped hood part 2Oj the cooling tubes 22,

23, 24 have no nozzle mouthpieces, but have unconstricted ones Outflow openings with the same width, gusty that one Blockage due to impurities contained in the cooling water

- is excluded · The hood part 19 is supported against the hat part 3 and the upper part of the cylinder part 4 by means of bistable bolts 26 attached to it, so there is only a line welded connection with the Hansen 6. The cup-shaped part 20 is also with only one annular weld seam on the sheet metal jacket 4 attached. The cooling water is conveyed into the ring line 21 through one or two pipes 27, 28. These tubes 27, 28 are guided through the support ring and the pins 10, 11 provided with a bore 44 (FIG. 3); the corresponding water supply lines lying outside the pegs are denoted by 29, 30 and are connected to the cooling water system. The direction of flow is in Pig. l _r 2 and 3 denoted by arrows. -

The water running off from the jacket parts 3, 4 collects is at the bottom 46 of the trough-shaped part 20 and can through the drainage pipes 32, 33 either under the action of gravity run off - in the blowing position of the crucible - or the water is sucked off by a pump 53 sucking in a water-air mixture, so that the water can drain freely even in the tilted crucible position. The tubes 32, 33 open at the bottom 46 of the Part 20 and the mouths are opposite one another in the tilting plane of the crucible. In a vertical crucible position, this can be done Water is removed either through pipe 32 or through pipe 33.

* Leads to without causing a major accumulation of water within the space between the cooling jacket and the crucible jacket can come. Two more drain pipes 34 »35 are also in the tilting plane are arranged opposite each other, with these tubes in the upper part of the space between the cooling jacket and the

'Gelmantel protrude up to the Hansen 6. In the tilted position (Ed. 4 c, 4 d) the cooling water is sucked off through these pipes.

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BLe drainage pipes 32, 33 »34» 35 are laid within the support ring 9 and are guided through the bores 44 in the pins 10, 11, with coaxial bores 29 * 36, 38 or 30, expediently within the pins 10, 11. 37, 39 are relocated, so that a space-saving solution for the supply and discharge of the cooling water to and from the space between the cooling jacket and the lying jacket is created. Details of the design of the coaxial tubes 29 * 38, 36 are from SIg. 3 can be seen - In this bar position, the pin labeled 10 '■ is designed somewhat differently than the pin 10 in 3Fig. 1. The same applies to the pin U ¹ 'in Fig. 2, which has only two coaxial tubes 37, 39 for the water drainage. In this arrangement, only a single water supply pipe 29 is provided for the ring line 21. The further connecting lines leading to the pump 53 for the drainage of the cooling water from the crucible system are denoted by 40, 41, 42, 43 (Mg. 4 a).

The puncture of the cooling system is in the SIg. 4 a - 4 d explains «Pig. 4 a shows in a schematic representation the outside of the crucible system in the barrel discharge lines 40, 41, 42, 43 arranged shut-off valves 48, 49, 50, 51, which are operated by a copier switch 54. This copier counter 54 is connected to the crucible tilting drive and closes and opens the individual valves depending on the position of the crucible 1. The electrical control lines are denoted by 55 '. Through a manifold 52, the cooling water sucked off by the J pump 53. In the trough-shaped part 20 are in the level of the pivot pin openings 47 for the access of air provided in the space between the hood 18 and the crucible jacket. The suction power of the pump 53 is greater than the amount of water that can be supplied through the lines 29, 30, so that on the one hand no water can remain inside the hood 18 and on the other hand, air is sucked in. It is therefore necessary that the "Wentile 48, 49» 50, 51 in the drain lines to be controlled so that only one drain line is open at a time, while the rest

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stay closed. . .

As shown in JIg, 4 a, the barrel flows in the · blowing position of the crucible ζ. B, ab'i through lines 32, .40, / the valve 48 is open, the valves 49 ^»5O" 51 are / Ge jig "_'r> included in the in.". 4 b drawn tilt position is the drainage through the lines 33, 41? the valve 49 is opened, the other. valves closed. In Hg, 40 * which denotes ^: "'-";''-["-' ■ shows the pan tilted downwards, the water is sucked off through the lines 35, 43; while the valve 51 is open. . ν Hg, 4 d shows the crucible top position. Here comes the suction pipe'34; and the drain line 42 in function; while the valve 50 is open, the other valves are closed. The copier switch 54 is set so that that suction pipe is put into operation, the mouth of which in the area of the hood 18 is located at the lowest point with respect to the water that collects.

The outer contour of the hood-shaped cooling jacket 18 Γ -, - is expediently designed so that the slag flowing out of the crucible mouth cannot run onto the support ring or onto the crucible bearings. The hood part 19 is therefore down over the Einglej device 21 also extends and optionally with j an S chlaoke deflecting article 45 (Pig. 3) provided ^{1, 1} Bin Bindriigen steels and Schlacjke in the hood 18 is nipht possible

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COPY

ORIGINAL INSPECTED

Claims (7)

Pat ent anippü ohe: .- * 1. "Seal or converter with a refractory lined _: Bleohmantel, which is tiltably mounted in a support ring provided with two pegs, whereby the preferably conical upper part (hat) of the crucible is water-cooled ., characterized in that the upper part (3, 4) from a hood-shaped, close to the bottom and top Cooling jacket (18) is surrounded, with ¥ ssserzuführungsrohre, (22, 23 «24). in connection with the outside air standing space between the cooling jacket "(19) and the crucible jacket (3, 4) are sufficient for the supply of cooling water at its plurality of evenly distributed points on the crucible jacket are determined and that from the space between the cooling jacket and crucible jacket pipes (32, 33, 34, 35) to lead free drainage of the cooling water to the outside. 2. crucible or converter according to claim 1, characterized in that the ends of the space between the cooling jacket (19) and crucible jacket (3 »4)) outgoing water drainage pipes I. (32, 33 »34, j 35) at different altitudes with respect to the horizontal plane laid through the tilt axis of the crucible lie »bo that the cooling water in every tilted position of the crucible can run freely, i 3. crucible oder'Konverter according to claim 1, characterized gekennäeiohnet, that in the lower part of the hood-shaped crucible jacket (18) a ring line (21) is installed with several ~ f pipes of different lengths »roughly parallel to the generators of the lead shell (3» 4) arranged side by side (22 » j 23, 24) is connected, which tubes have an outflow opening at the upper end each with a baffle plate (25) for distributing the cooling water over a possibly large area « 009886/1 A30 copy or! Qinal inspected 4. · Crucible or converter according to claims 1 to 3, characterized characterized in that four drainage pipes (32, 33 »34, 35) are arranged, of which a pair (32, 33) in the ground (46) of the hood part (20) opens and the other pair (34, 35) until the upper end of the sheet metal dough (3) is guided, depending on the tilted position · of the crucible (I); the end of each drainpipe is »at the lowest point for sucking off the collecting water · 5. crucible or converter according to claims 1 to 4 ». characterized in that shut-off devices (48, 49, 50, 51) are arranged in the drain pipes (32, 33, 34, 35) which are actuated by a copier switch (54) cooperating with the tilting drive of the crucible (1), so that in the upright or approximately horizontal crucible position one of the drainage pipes ( _32f 33) opening into the bottom (46) of the hood part (20) and one of the drainage pipes (34) reaching up to the upper end of the sheet metal jacket (3) in a position tilted by about 180 ° , 35ί is opened while the remaining drain lines remain closed. 6. crucible or converter according to claims 1 to 5, characterized marked that the socket for the supply and removal of the Cooling water within the support ring (9) and the pin (10, 11) of the crucible (1) are relocated. 7. crucible or converter according to claims 1 to 6, characterized in that the discharge pipes (40, 41, 42, 43) ± n open a common drilling line (52) ¹ which is connected to a pump ( 53), whereby the lines and the pump are dimensioned and made of * - • are laid out so that the suction power is greater than the amount of water that leads. 00 9886/1 A 3 0. COFV Blank it e