DE1433601A1 - Converter for steel making - Google Patents

Description

U33601

27/29

June 28, 1962 B 1 PG 62/4

Pintsch Bamag Aktiengesellschaft branch office Cologne-Bayenthal, Cologne-Bayenthal

Converter for steel making

The invention relates to a converter for the Steel production, which is particularly suitable for the oxygen blowing process.

There are essentially two converter designs known: converter with a loose support ring and converter with support ring welded tightly around the vessel jacket.

In the case of converters with a loose support ring, the vessels are mounted on the support ring with radial claws so that they are expand freely with increasing temperature and can therefore hardly acquire any thermal stresses. On the other hand, has has shown that converter vessels of this type are often exposed to such high tensile stresses and temperatures that the yield point is exceeded and permanent deformations occur. A noticeable one then gradually arises Vascular growth that becomes so strong after years

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can that the converter vessels have grown completely into the originally loose support ring and above and below of the support ring have swelled far over the support ring in the form of a bead * Cracks can form in the converter jacket and with riveted converters the rivets can shear off. - The cause of these difficulties is the considerable one Pressure of the masonry, which on average is much hotter than the converter jacket and which also changes when it is attached the same coefficient of thermal expansion strives to expand accordingly more. The resulting tensile stress state in the converter jacket is similar to that of a high-pressure vessel. In addition, the strength of the vessel with higher Temperature decreases .. The temperatures in the vessel jacket rise with increasing masonry burnout, because the insulating masonry layer becomes thinner. At the same time, the pressure on the masonry is reduced because only There is less masonry, but the remaining masonry or permanent lining can be replaced by sintering, compression hardening, etc. " also exert a relatively high internal pressure »

These disadvantages become more noticeable with increasing converter size, because the vessel wall thicknesses are not arbitrarily with can increase, as otherwise unfavorable conditions in the weld seams, especially in welded constructions,

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result in multidimensional, uncontrollable stress states, etc., which can represent further sources of damage.

In the case of converter vessels with a permanently welded-on support ring, if the support ring guide is correspondingly strong in the converter middle part prevents vascular growth by force, above and below the support ring - possibly even within of the same - however, considerable tensile stresses can still occur in the vessel jacket, namely when the masonry is still new and still exerts considerable thermal expansion pressure. In addition, with this known design, with strong Wall burnout the temperature differences between the Ren colder support ring part and the hot vessel wall can be so high that the vessel jacket in the area of the support ring attachment then even comes under strong compressive stress, especially if the masonry is burned out so far that it can no longer exert a corresponding counter pressure. These compressive stresses are particularly dangerous because they can lead to the formation of waves and wrinkles in the sheet metal as soon as the critical buckling stress is exceeded, which is much lower than the permissible tensile or compressive stresses, local overstressing of the material in the folds can in turn cause cracks in the vessel jacket. In addition, the permanently welded support ring is the converter vessel partly from the tensile stresses in new masonry

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relieved, even in its outer part, but constantly under tension, both with new and burned-out masonry stands. In particular due to the large temperature differences between the vessel jacket plate and the outer belt of the support ring (in the case of burned-out masonry) tensile stresses can arise which are multiples of that caused by the static forces and moments caused stresses. The support ring is thus constantly far beyond its actual task, To carry the vessel when blowing and tilting, corresponding loads also overwhelmed, so that converter with The welded-on support ring can only be used if the design is careful and the support ring is significantly oversized.

The invention has the task of eliminating the disadvantages of the known converter types.

According to the invention, this is achieved by a plurality of radially extending strong steel rings which are fixedly arranged at least on the central part of the converter shell at a distance from one another. These radial rings can, depending on the size of the converter, either only over the middle part or else
be distributed approximately evenly over the entire converter shell. The radial rings arranged in this way on the jacket have four advantages. You relieve
the vessel jacket everywhere from the masonry pressure

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caused particularly dangerous tangential tensile stresses. Due to the relatively small distances between the radial rings, the buckling lengths of the shell plate reduced and thus the critical structural stresses increased to such an extent that they can no longer be reached can. Heat dissipation from the vessel jacket via the radial rings increases the temperature of the vessel jacket reduced and thus largely avoided the reduction in its strength properties; at the same time the occurring temperature differences are reduced and the resulting thermal stresses are reduced. In the end the support ring is restored to its original position due to the effect of the radial rings distributed on the vessel jacket Task of carrying the converter in all tilted positions, and does not need more than is necessary for this is to be sized. The advantages described have a particular effect on large converter vessels, as they are used more and more in steelmaking by the oxygen blowing process.

■ The radial rings can be of various shapes, mostly flat Have a profile, with a reinforcement of the material towards the outer edge for the absorption of increased tensile stress here can be beneficial. It is essential that the

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Radial rings are relatively thick-walled or EB _s if the material thickness can no longer be increased, are arranged according to zahlv & ioh. Both measures act in the same way, they result in good stiffening and good heat dissipation to the outside. In these rings, therefore, only insignificant temperature differences and heat tensions occur. However, there are also. Stress cases are conceivable in which the use of belts lying flat on the jacket plate instead of the radial rings protruding from the jacket on some parts of the converter vessel is sufficient to achieve the object on which the invention is based.

According to the invention, flat but strong radial rings attached to the converter shell with one narrow side are advantageously used used? along the outer edges of steel belts or sheet metal strips are welded, either just around run around a ring or are arranged in such a way that closed box-like channels arise through the Coolant can be conducted «,

Above the middle area of the converter vessel on the outer edge Strong steel belts welded on by radial rings advantageously take on at least one essential aspect

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Part of the puncture of the support ring, according to the invention the converter pins are fastened in holding pieces made of cast steel, which are inserted into the radial rings of the converter center part are used, the ends of the radial rings adjoining the holding pieces with the rings aligned tongue-shaped approaches of the holding pieces are welded on. The holding pieces {in the middle for receiving the converter pin are advantageously hub-shaped formed and run inside in a substantially rectangular, curved in the radius of the converter shell, shield welded into the converter shell and outside in a substantially rectangular one, optionally with Sohild welded the steel bands that girded over the central radial rings. This is how the support ring is so included in the radial ring system that the The effectiveness of the radial rings is not impaired by interrupting the rings. The support ring elements form ™

only through the girdle of the radial rings and through the inserted hub pieces provide additional reinforcement at those points where it is used for initiation and reception the forces and moments that occur when the converter is carried and tilted is required.

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PUr cases in which the arrangement of via the converter « Radial rings distributed by the jacket alone are not sufficient to relieve the stresses in the vessel jacket to a sufficient extent to diminish that vascular growth with certainty and cracking are avoided, it is proposed that they be cut out accordingly on their inner edge Radial rings - to be arranged longitudinal chords running along surface lines. The longitudinal straps form an additional axial stiffening, which is advantageous when in addition to the arrangement of radial rings according to the invention controllable tangential stresses, the stresses in the axial direction take on dangerous values.

To further improve the heat dissipation, the radial rings are perforated according to the invention, the loohung being attached in such a way that a flow of cooling air can flow through from the lower to the upper end of the converter. During the converter operation, such a flow of cooling air is formed, by the heated on the shell plate and the radial rings and optionally substituted on the longitudinal flanges, etc. ambient air rises, while cold from below air n _a chströmt.

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In certain operating conditions, this may be sufficient Cooling through the natural flow of cooling air does not work out, especially in the last part of a converter trip, if that The masonry is burned out very far and the remaining relatively thin masonry blocks the flow of heat into the vessel jacket only a little handicapped. According to the invention, a ring line is therefore provided on the lower part of the converter jacket, which is preferably done by box-shaped closing of two lower radial rings by means of a thin outer sheet is formed. The ring line is provided with upwardly directed blow-out openings and has at least a laterally protruding air inlet scoop. Fixed compressed air nozzles are in an unimpeded tilting the converter permitting distance in front of the air inlet ducts arranged so that they are in the blowing position of the converter are directed at the air inlet ducts. During the ^ blowing - the greatest amount of heat being dissipated. ' is can in this way an additional cooling flow can be superimposed on the naturally occurring cooling air flow. The blower air supply can be regulated according to the respective requirements by throttling.

In order to achieve a particularly economical and nevertheless frustrated

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Io

To enable greater cooling, temperature sensors are distributed according to the invention on the converter jacket and, if necessary, on the outer steel strips surrounding the radial rings. The temperature sensors are functional, the monitoring of the temperature distribution ₉ so that the forced air cooling can be respectively switched to the extent necessary allow the converter with fesip @ raturan2eigern _P -Schreibern, warning systems o _e ä "verbuncl s j. Automatic regulation by a control device actuated by the temperature sensors and switching on the blower air supply when predetermined temperatures are exceeded is particularly advantageous.

Further features and advantages of the invention are explained in the following description, in which with reference Embodiments of the converter according to the invention are described on the drawings »They show:

J ¹ Ig ₀ 1 the wall of a known converter with a welded support ring in section;

2 a longitudinal section through the wall of a converter, on whose jacket radial rings and longitudinal belts are arranged ι

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- li -

Fig. 3 is a partial section along the line III-III in Pig. 2;

Pig. 4 a partial section along the line IV-I? in Pig. 2;

Pig. 5 shows the side view of a converter according to FIG. 2;

Pig. 6 is a view of the converter in FIG. 1 from above;

Pig. Figure 7 is a side view of another embodiment of the converter;

Pig. 8 shows a longitudinal section along the line VIII-VIII in Pig. 7;

Pig. 9 shows a partial section along the line IX-IX in FIG. 7;

Pig. Io shows a section along the line X-X in FIG. 9;

11 shows a partial section along the line XI-XI in FIG. 8;

12 different embodiments of the radial rings on average.

In Fig. 1 is on the cylindrical central part of the converter shell 1 a support ring, consisting of a support ring belt

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and on the upper and lower edge of the support ring belts B 2 welded radial ring sheets 3, welded in place. The broken lines 4 and 4 * indicate the strength of the brick lining at the beginning and at the end of a converter trip. With this known converter design, higher tensile stresses in the vessel jacket are only localized at the ν fastening pointsJ? the support ring plates 3, but the support ring 2, 3 itself is exposed to considerably greater loads than would be given solely by the forces and moments to be transmitted when holding and tilting the converter vessel,

In the embodiment of the invention according to FIGS. 2 to 6 are uniform over the entire converter shell Spaced radial rings 5 on the converter jacket plate, which relieve the vessel jacket from tangential stresses 6 welded in place. The masonry at the beginning and the end of a converter trip is again drawn with broken lines 4 and 4 ·. Except for the radial rings 5 Longitudinal belts 7 are provided for absorbing axial stresses along the surface lines of the vessel. As in Fig. 3 can be seen, these longitudinal belts 7 lie on the converter 6 only firmly on, however, are on the cladding sheet

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not welded on. The longitudinal belts run under the radial rings 5 provided at the crossing points with recesses 8 that are well rounded at the ends and are fastened to the edges of the recesses 8 by welds 9. The fastening avoids longitudinal welds on the cladding sheet, which would weaken its resistance to tangential stresses. The upper ends of the longitudinal belts 7 are, as shown in FIGS. 5 and 6, welded to tongue-shaped projections Io of a connection cone 11 that is flapped onto the converter casing near the converter mouth, the lower ends are in the same way to an AnachlußkonuB 'II ¹ at the lower end of the converter attached. The connection cones simultaneously form a stiffening of the converter mouth part or the base area. This stiffening effect is so special like dera advantageous because the mouth portion of the converter mantle particularly high edge stresses is governed by here when expanding tapered into a wedge-end masonry and particularly high temperatures, while the converter bottom dee through the masonry pressure and at a vertical position converter n <jch addition is heavily burdened by the full weight of the batch.

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-H-

In the middle area of the converter, the radial rings 5 are parallel to the converter jacket 6 on the outer edges running steel strips 12 welded on, each of which closes the space between two radial rings like a box. These steel bands 12 have to take over the function of the support ring and are diametrically opposed to described in detail below, the pivot pins of the converter supporting holding pieces connected. For stiffening the arrangement longitudinal webs 13 are used, which on the Longitudinal belts 7 are welded, which in turn welds on the jacket sheet, which the resistance against Tangential stresses could reduce are avoided. Such an arrangement may already be sufficient around the difficulties encountered with the known converters in accordance with those on which the invention is based To eliminate task.

In addition, in the converter according to FIGS. 1 to 6 in the lower converter part, the spaces between the radial rings 5 are closed in a box-like manner by thinner sheet-metal strips 14 welded to the edge thereof. In the upper part of the converter are also thinner sheet metal strips 15 to the

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Hand the radial rings 5 welded on. These shield plates 15 are at an angle to the converter shell, in such a way that they roof-like the spaces between the radial rings Shield against over-foaming slag from the converter or other contamination. All radial rings are provided with holes 16 at intervals, which are in the superimposed ladial rings against each other are arranged offset. In this way it is achieved that the entire converter jacket is surrounded by cooling chambers is through which cooling air can flow from bottom to top, so that the heat from the converter jacket 6 and is discharged in the radial rings 5. The offset arrangement of the holes 16 in the one above the other Radial rings receive the flow in each case lateral components, whereby the flow through the individual Cold rooms and thus the flushing out of the warm air

to be improved. Between the protruding edges of the shield plates 15 and the radial rings below there is enough free cross-section to allow a partial flow of the cooling air to exit without major flow resistance, while the remaining part the cooling air flows through the cooling chambers above. As long as the lining of the converter vessel is still pretty much is strong, the natural cooling air that forms is sufficient

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flow to keep the temperatures in the converter shell plate and in the radial rings in a range that ensures sufficient strength of the jacket sheet or keeps the thermal stresses within tolerable limits. With increasing Converter burnout can then use artificial cooling.

For this purpose, by closing the gap between the two lowermost radial rings by means of A ring line 17 formed from a sheet metal strip 14 is equipped with two oppositely arranged air inlet ducts 18. These air inlet ducts have a sufficiently large cross-section and are designed to be aerodynamically efficient, that they only negligibly affect the natural cooling flow. The well-rounded inlet 19 the scoop is like pig. 4 shows, via an intermediate piece 2o with a constant cross-section with a trouser-tube formed, on both sides tangentially into the ring line 17 opening double diffuser 21 connected »The Double diffuser 21 is on the outside through the correspondingly bent ends of the sheet metal strip 14 and on the The side facing the converter jacket is formed by a guide plate 22 welded into the ring line 17.

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At the lower edge of the Leitbleohes 22 is between The lower edge and the lowermost radial ring 5 left a gap 23 through which the inflowing air to the Part of the converter jacket sheet, which is covered by the guide sheet, can pass, so that this jacket area is not hit by the full jet of cooling air entering through the air inlet (| scoops, whereby this point might be cooled too much, but is still sufficiently cooled. Through an opening 16 ″ in the radial ring 5 ′ that closes off the ring line 17 or the diffuser 21 at the top, the air flows also from the space behind the diffuser upwards and forms along the converter jacket area above in the same way a cooling flow as it does above the all the rest of the coat prevails.

Opposing nozzles through the air inlet duct 18 29, additional cooling air can be fed into the ring line to strengthen the natural cooling flow along the converter jacket 17 are blown in. In FIGS. 5 and 6, the nozzles 24 are connected to blowers 26 via pipes 25. By switched into the pipelines 25 Throttle valves 27 can be supplied by the blower additional Cooling air can be throttled. The distance between

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the nozzle 24 and the air inlet duct 18 is so "dimensioned, that the converter vessel can be tilted freely. At the same time it is achieved that the natural Flow can enter completely unhindered as long as the fan air is not yet switched on.

In order to control the additional cooling, according to the invention, thermal sensors 28 are distributed over the converter jacket, which determine its temperatures at various points during operation. Another thermal sensor 28 ^f monitors the temperature of the steel strips 12, so that the temperature difference between these and the jacket sheet is also detected. The measured temperatures can either be read on display devices or recorded with temperature recorders, according to their display values. Then the cooling air fan is switched on and the cooling air flow is regulated by hand. However, an automatic control known per se can also advantageously be provided which receives its control pulses from the thermal sensors 28 and switches on the cooling fans 26 at certain predetermined temperature values and

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the regulation within a certain temperature range performs.

The cooling device according to the invention is extremely economical. Firstly, sufficient cooling is required over a considerable part of the operating time of the converter

of the converter jacket without additional means, only by means of the natural cooling flow that builds up, Furthermore, the additional cooling works particularly economically *. They are namely for the dissipation of the heat at stronger A fire in the converter lining requires relatively large amounts of air, but its pressure is moderate can be low because the pressure losses in the Cooling system can be kept small. The invention geaäfie Arrangement avoids space-consuming and expensive fan " se for large flow rates by having blowers for higher bridge, but with smaller flow rates, which is essential are smaller and cheaper to which nozzles 24 are connected. In the nozzles 24, the pressure of the blower air is in Speed implemented (a total pressure of 15o mm WS results in an air speed of about 5o'm / sec) and the air jet emerging at relatively high speed pulls a considerable amount of air out of the environment

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in the air inlet scoop 18 with, so that in this way the required large amount of air is used for cooling will. The intermediate piece 2o of the air inlet scoop acts as a mixing tube in which a speed compensation takes place between the blower air and the entrained ambient air. That way will a mixture of fan and ambient air into the cooling device promoted, the amount and pressure of which then meet the requirements of cooling in all operating states of the Converter. Compared to the cooling devices known, for example, from Bessemer converters, in which the Blown air is first passed around the jacket, the cooling device according to the invention has the advantage that the natural cooling flow is constantly used, so that no · '. . -. · Coolant supply through the converter pin takes place and thereby eliminating cooling air connections with glands that the cooling air essentially runs in the natural direction of flow from bottom to top and that only relatively little fan air is required will.

In FIGS. 7 and 8, a converter design is shown in which no additional cooling is provided. There Different modes of operation in the steel mills

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Converters are common, whereby in one plant the lining of the converter is burned out less than in the other, for example from 100 mm to 25o mm heat, instead of from loo to 15o mm residual masonry, can possibly with sufficiently thick masonry or permanent lining the natural cooling is sufficient over the entire operating area.

The casing 29 of the converter according to FIGS. 7 and 8 is, as in the previously described embodiment, surrounded by a number of radial rings 3o spaced apart from one another, under which longitudinal belts 31, which are firmly resting on the casing sheet, run. The ends of the longitudinal belts 31 are, similar to the embodiment described above, welded to tongue-shaped projections 32 from above and below on the converter jacket sheet metal rings 33 welded. Like Pig. 9 and Io show, a wedge-shaped fitting piece 34 is driven between the upper side of the longitudinal belt and the edge of the recess of the radial ring and then welded to the radial ring to fasten the longitudinal belts 31 at the points of intersection with the radi air in / ^ en 3ö. With this design, a particularly even pressure of the L-ings-

BATH ORIGINAL 909836/0359

Straps at the points of the vessel jacket and thus the same load capacity of all longitudinal straps can be achieved. Repairs are easy to carry out after the fitting pieces 34 have burned loose from the hadial rings 3o. As long as the fitting pieces 34 are not wedged tight, the longitudinal belts can still move in the recesses, and in this state it is that It is easy to combine several individual parts to form a longitudinal belt. Finally, the attachment offers through Adapters still have the advantage that the longitudinal straps are not by weakening transverse weld seams at the points of intersection with the radial rings.

On both sides next to the fastening point of the longitudinal belts or the fitting pieces, wide fillets 35 are provided in the radial rings, as are known to be advantageous for a good line of force in the sheet metal . In addition, cooling air flow past through the openings on both sides of the longitudinal straps, so that a check v / eg the large number of openings largely vuab & hSnäzrte _f natural cooling flow VZN below Naeh above sr. Eo-vver :: -? ¹ »can form along the jacket. Idese Kühlströmisiii: g ^a iz oil vessel jacket over / irkt »that also the zvilsehes. de: Radialrin / -en isefindlicfc-e air into one

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which ultimately also increases the air circulation around the hands of the radial rings.

The distances between the radial rings 3ο ^{1 are} relatively narrow above the cylindrical converter middle part. This increases the cooling surface and the thermal stress on the individual rings is less, so that the rings can take over the static and dynamic loads that occur when the converter is tilted to a greater extent. To increase the resistance to the stress occurring during tilting, steel bands 36 are welded along the outer edges of the radial rings 3o "at approximately the lower and upper end of the cylindrical central part of the vessel, the radial rings in between are only reinforced in the area of the converter pins by appropriately designed tilting pin mountings Tilt pins 37 are shrunk into holding pieces 38 made of cast steel in a manner known per se and are also firmly welded in with the welds 39, 39 ' into approximately right-angled shields 4o and 41. The inner shield 4o

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is curved according to the radius of the converter shell and forms part of the converter shell. The rectangular one Shape has the advantage that the shield 4o is simply welded between two sheet metal sections of the jacket can be, so that when inserting different, for example round, shaped parts occurring unfavorable Shrinkage stresses in so-called all-round or penster weld seams can be avoided.

This mounting of the converter pin is also advantageous in the converter design according to FIGS. 2 to 6 use. In Fig. 8 and 11 are on the side edges of the Outer shield 41 connecting pieces 42, 42 'attached, their Ends are welded to the ends of the steel bands 36 girding over the radial rings 3o ″. In the converter design according to FIGS. 2 to 6, the edges of the shield would be 41 with the adjoining ends of all the converter vessels covering the radial rings in the central area To weld steel strips 12. On the hub-shaped hull the holding pieces 38 are interrupted by the holding pieces Radial rings 30 · aligned, tongue-shaped lugs 38 'as well as with the above and below the retaining bag running longitudinal straps 31 »aligned lugs 38»

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intended. The ends of the radial rings 3o »" or the longitudinal belts 31 * are each with these approaches 38 ', 38 * butt welded. This is a flawless way frictional connection from the converter pin. 37 made for all individual elements that are intended are to absorb the forces and moments caused by holding and tilting the converter vessel or to transfer.

As can be seen in FIG. 11, the pivot pin 37 does not extend through the holding piece 38 as far as the converter jacket, so that a free cavity 43 remains at the pin end, which is ventilated through the openings 44. Cooling air flows to the ventilation openings 44 from the cooling flow forming along the converter jacket, for example through cooling air openings 45 in the two radial rings ^{3o 11f} (cf. FIG. 8). The cooling air space 43 is closed to the walling of the converter by a curved plate 46, so that it is prevented that the masonry in the area of the pivot pin is subject to other cooling conditions than under the jacket sheet on the rest of the vessel wall. In this way local stresses in the masonry are avoided.

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The plate 46 is relatively thin and resilient so that no cracks are formed in the fastening seams can occur as a result of thermal stress.

In FIGS. 8 and 11 a known, hollow, ■ water-cooled converter pin 37 is shown, the use of which is also advantageous in the converters according to the invention. The pin has an axial bore extending over its entire length, which is used for cooling water is flowed through. On the side facing the converter, the cooling water space is against the cooling air space 43 by a just like the plate 46, a relatively thin and flexible plate 47 is closed.

Due to the largely "open", i.e. uncovered, construction of the converter in FIGS. 7 and 8, the heat radiation hindered as little as possible by the vessel jacket and the belts and radial rings surrounding it, so that as a result die.vorvorbeschreibe cooling due to the natural formation along the converter surface Air flow is still supported. Only in the upper area of the vessel is it useful if there is one on the outer edge Radial ring or sheet metal on the converter shell itself «

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- 27 strips 48 and 4-9 are welded so that they are roof-like

protrude and so the converter jacket and that of it radially Shield outwardly protruding rings from splashes, overflowing slag, etc.

In Pig. 12 some radial ring cross-sections are shown, which can be advantageous for reasons of strength, in particular because the tensile stresses of the radial rings on their outer edge reach their maximum values as soon as the temperature differences occur exceed a certain level. The radial ring 50 consists of a whale profile that becomes stronger on one side, whose reinforcement forms the outer edge of the ring. The radial rings 50 "and 50" are essentially flat Reehteek cross-section, along its edge with rod material round or square cross-section is welded.

Similar to the case of the clad converter design, temperature monitoring by means of temperature sensors distributed over the vessel jacket can also be provided for the unclad design. Here, too, Ee is the combination with artificial additional cooling under Um *. would be advantageous. For this purpose, either on the un-

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a "ring line for the supply of blower air with upwardly directed outlet openings or nozzles, which are directed to the cooling air t * df f" openings 35 in the ring above, or it could be in the same way as. it was described with reference to Eg, 2 to 6 , a lower ring line 17 can be formed. In principle, depending on the requirements that are made in the individual case, the various structural features shown in the two exemplary embodiments can advantageously be combined with one another. As an example of this, apart from the water-cooled converter pin, - ?? in FIGS. 8 and 11 a pouring spout 51 for emptying steel through a side opening 52 (Mg. 8) sloped *. The ends of the pouring nozzle 51 duroh interrupted radial ring are on both sides welded to the nozzle "Also, the use of a known auswechsei-" cash orifice ring 53 'and Onea exchangeable bottom 54 is advantageously possible'

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Claims (1)

U3360.1 Claims 1 «Stalilwerkskonverter, characterized by several at least on the middle part of the converter jacket (6, 29} Ia spaced apart fixed, see radially extending steel rings (5, 39). 2 # converter according to claim 1, characterized in that that the ladial rings (5, 3o) on their inner edge at least Partly welded to the Koavertemtantel (6, 29) and according to claim 1 or Z ₁ characterized durojt wm outer edge reinforced 'steel rings (5, 3p ", 5o, 4 »Kewrwrte? according to claim 3, characterized by flat »« tt one narrow side attached to the converter shell · Radial rings (5, 3o ") are welded along the outer edges or sheet metal strips. 909836/0359 H33601 - 3ο - 5. Converter to. Claim 4 »characterized» that the steel strips (12) or sheet metal strips (14) such are welded on that closed »box-like channels arise »through which the coolant can be conducted. 6 »Converter according to claim 4, characterized in that that the sheet metal strips C15 »48) with their upper edge on the Hadial rings (5, 3o) on the upper part of the converter are welded so that they cover the space between adjacent radial rings like a roof. 7i converter according to one of claims 1 to 6, characterized »that the converter pins (37) carrying holding pieces (38) made of cast steel are inserted into the radial rings (3ο ¹ ) * of the converter middle part» whereby the ends of the radial rings adjoining the holding pieces are attached to ait tongue-shaped lugs (38 *) that are aligned with the wrestlers are welded on «, 8. Converter according to claim 7, characterized in that the holding pieces (38) are formed in the middle for receiving the converter pin {3Ί} in the shape of a honeycomb 909336/03 & 9 "U33601 and inside in a substantially rectangular, curved in the radius of the converter jacket (29), in the Converter jacket welded in shield (4o) and on the outside in a substantially rectangular, if necessary with the steel strips (12, 36) welded shield (41) run out. 9. Converter according to one of claims 1 to 8, characterized by along surface lines under the radial rings recessed accordingly on their inner edge (5, 3o) running longitudinal straps (7.31). 10. Converter according to claim 9 _f, characterized in that the ends of the longitudinal belts (7, 31) an.zunge-like projections (lo, 32) of sheet metal domes or cones (11, 33) that are lapped onto the converter jacket at the upper and lower ends of the converter ) are welded on. 11. Converter according to claim Io, characterized in that that the longitudinal belts (7) are welded to the radial rings (5) at the intersections. BATH ORIGINAL 909836/0359 U33601 12. Converter according to claim Io, characterized in that that the longitudinal belts (31) at their intersection with the radial rings (3o) by wedge-shaped, after wedging Fitting pieces (34) welded to the radial rings are pressed against the converter casing (29). 13. Converter according to one of claims 8 to 12, characterized by welded onto the longitudinal belts (7), which resulted from the overlapping of radial rings (5) Box cross-sections stiffening longitudinal webs (13) » 14. Converter according to one of claims 1 to 13, characterized by perforated radial rings (5, 3o), whose Perforation is attached so that a flow of cooling air can flow through from the lower to the upper end of the converter. · 15 * converter according to claim 14, characterized in that the recesses in the radial rings (3o) on the Crossing points with the longitudinal belts (31) on both sides as a cooling air passage (35) are well rounded. 909836/0359 U33601 16. Converter according to the eleventh of claims 1 to 15, characterized through a ring line (e.g. 17) at the bottom Part of the lake converter jacket, which is preferably by box-shaped closure of two lower radial rings (5, 5 ') »formed by means of a thin outer sheet (14) · is, with upwardly directed exhaust openings and at least one laterally protruding air inlet cap (18), as well as by fixed, in the blowing position of the Kottverters on the air inlet ducts (18) directed Forced air nozzles (24) that tilt in an unimpeded manner of the converter are arranged at a distance from the air inlet ducts, 17. Konvöite * ftach claim 16 characterized by air inlet stubs (18), the inlet fillet (19) of which has an intermediate piece (2o) with a constant cross-section sdt a "pant tube-like, both sides tangentially into the ring line (17) opening, asdtdten" at the junction ( 22) is connected with an Iwft passage bff- mxn $ W) iNrreelienett double diffusor (21) directed towards the commercial (6). 90983B / 0359 U33601 18. Converter according to one of claims 1 to 17 * characterized by ^{temperature sensors (28, 28 f} ), for example thermocouples with temperature indicators, distributed on the converter jacket (6) and optionally on outer steel strips (12) surrounding the Kadiairings (5) - write »warning systems, control devices for pressure pen cooling or similar are connected, 19 · Converter according to claim 18, characterized by one of the temperature sensors (28, 28 *) actuated, when the predetermined temperatures are exceeded, the control device for the control device which switches on the compressed air supply Forced air cooling. 909836/0359