DE2003339A1 - Device for acting on the blow nozzles of a steel converter floor - Google Patents

Description

Device for acting on the blow holes,. one

Steel converter floor

The invention described in the main patent relates to a device for acting on a steel converter floor with a blowing wind, the use of which is particularly advantageous when the blowing pressure is more than 3 bar. This device is made up of a wide variety of pressurized header pipes which are in the form of concentrically arranged gates, or any other suitable shape can, with each of these collector tubes having a certain number of blow openings in the converter base with a wind blow provided.

To connect each of the header pipes to the blow holes, either flexible tubes or tubes with a small diameter were provided in the main patent, the one or several spiral windings in order to give them a certain elasticity, both the one and the also the others in advantageous part with connection

-Z-

0098A7 / 0iAg

- 2 pieces can be provided with self-locking.

Each of the blow openings formed by a metal pipe is supplied with blow wind by a movable injector, its Head is sealed against the frustoconical The base of the pipe has been laid, with this injector itself surrounded by a pressurized communicating with it Chamber is fed. This injector can optionally be provided with a movable closure, both the axis of the injector and the axis of the closure both coincide with the axis of the tube which the Blow opening forms.

If there are many blower openings, they are closer to one another and the above-described types of connection with the header pipes become bulky. That is why the main patent a device is provided which is characterized in that each pressurized header pipe is directly attached to the base plate is set against a series of blow openings, and in that it is opposite each opening by a movable, optionally provided with a closure injector is penetrated, the axis of the injector and optionally the axis of the closure coincide with the axis of the tube which forms the corresponding blast opening.

In the devices forming the subject of the main patent, the most important features of which have been listed above, is the application of the bottom of a converter with blowing wind is realized, which of only one kind of pure or mixed Gas is formed.

However, it may be necessary at the same time and without them too

• the ^ Bl & fidUse

mix, to blow two particular types of gas in rare equal HBHBt, which has a double feed, which is designed to be purer through it at the same time along its axis

- 3 009847/0949

Oxygen or air enriched with oxygen or also any other gaseous oxygen carrier can be blown, and on the other hand along the jacket of the oxygen gas jet a gaseous coolant such as water vapor or carbon dioxide gas.

The aim of the present invention is to use for a double feed that in the main patent only for a single feed generalize the devices described in such a way that equilateral two unmixed and under one higher Pressure than 3 bar standing gases can be blown in, whereby the value of 3 bar is the maximum of the usual blowing pressures Bessemer and Thomas steel works and the blowing pressures in the present Pail reach e.g. 20 bar or even more can. .

For this purpose, the present invention is directed to a device with a separate double feed for blowing nozzles of a steel converter floor, in which the blow nozzles in-'each Blow port having two concentric metal tubes, which is characterized in that it is one of two separate Has chambers ordering enclosure, each of which acts on at least one injector annularly, the head of which is in a sealing manner against the base of that of the two tubes of each nozzle which it supplies.

The present invention also relates to various embodiments of the above device, the first of these embodiments is preferably used for a limited number of blower nozzles, while the second embodiment is preferably used for a larger number of blower nozzles finds.

In the first embodiment, each nozzle has its own enclosure with two chambers, which are preferably cylindrical, and each of the two chambers has a flexible one

009847 / 09A ₈ ~ ⁴ "

BATH ORIGINAL

Pipe or a small diameter pipe connected to an associated gas collector. There are twice as many flexible ones Pipes or pipes with a small diameter are available such as air nozzles.

In the second embodiment, each row of blower nozzles has its own enclosure with two chambers, which is preferably toroidal, this enclosure opposite each blower nozzle is penetrated by the two injectors, each of which is connected to a specific chamber, each of the two toric chambers at one or more points of their mantle by any suitable means, be it a pipe or a flexible conduit.

In either of the two embodiments, the one can be deepest arranged and the tube located in the center injector of each nozzle with one already described in the main patent Be provided with a closure that is used when you see the wear and tear of a blower nozzle in operation want to measure, or want to put it out of operation for some other reason, e.g. if it is compared to the rate of wear the other air nozzles have worn out too quickly.

You can save yourself the need to attach such a closure by adding a blower nozzle to it in the event that it is wears out quickly, measuring its wear and failure by removing a screw plug from the base of the interior Unscrews the injector and introduces a bolt made of solid material into the inner tube of the blower nozzle in question or also by stuffing a suitable powdery material into this tube.

Experiments by the applicant have shown that during operation in the course of the conversion of the melt ± _n steel, the outer tube

009847/0948 "^"

of each air nozzle mainly in the longitudinal direction is subject to which are capable of moving the pipe in the order of several centimeters, and although most often towards the inside of the converter too. If the outer tube is rigidly attached, it suffers considerable damage Constrictions, which cracks, breaks, torsions and the like. Bring with them, from which vacancies result.

The exact causes of these longitudinal stresses on the outer tube of each blow nozzle have not yet been clarified. that it is an overall complex with the following phenomena:

Self-deformations of the converter bottom made of refractory materials, generally tarred dolomite;

Formation of a more or less significant Protuberance made of solidified metal at the end of the outer tube protruding into the interior of the converter and the dynamic pressure of the ülaswinds on this protuberance;

Convection currents of the melt around each blow nozzle under the impulse effect of its gas jet with the assistance of the the already mentioned protuberance made of solidified metal.

Whatever the exact causes for this longitudinal Constrictions may be the solution, their ominous breakage To prevent cracking action on the outer tube, the attachment of each enclosure with two chambers and the respective tubes formed any unit to take otarrneit.

Accordingly, this invention also relates to an apparatus Jiur application of a fresh converter with blowing wind, with which a separate double feed to the two konzenuriaene Konre having blow nozzles is possible, and which

- 6 009847/0948

is formed by an enclosure with two separate chambers, which each act on at least one injector in an annular manner, the head of which is supported in a sealing and firm manner against the base of that of the two tubes of each nozzle, which he supplies, which is characterized in that the enclosure consisting of two chambers, which with the two Pipes of the blower nozzle is firmly connected, can slide in a guide tube rigidly connected to the converter base plate, wherein the end face of this enclosure is supported against a suitable, elastic element which against the and / or is distributed in the base plate, while its lower surface is . against a suitable stop, such as one or two transverse pins.

According to one embodiment of the invention, the elastic Element the shape of one or more coil springs, or a set of disc springs or the like.

This latter embodiment is intended to be that of the two tubes and give their enclosure with the two chambers unit formed elasticity in the longitudinal direction. Since the outer tube mostly is directed towards the inside of the converter, is the elastic system, i.e. the coil springs or disc springs or the like., arranged between the end face of each enclosure and the bottom plate of the converter. You could also take part in the provide an elastic system on the opposite side, namely the lower surface, but this would mostly be useless. At On this side one wisely provides a stop system, which simply consists of one or two transversely directed pins can, which protrude outwards and in this way prevent the movable system from falling out of its guidance.

Further details and advantages of the invention can be found in FIG 'The following description with reference to the drawings, which form various embodiments on which the invention is not

- 7 -009847 / 09 * 8

is limited, show. The drawings show in:

Pig. 1 shows a section through a device according to the invention along the axis of a blower nozzle, which is used in the event of first embodiment described a meridional section through the cylindrical device, “while in the case of the second embodiment it is a cross-section is through the toric device to be explained;

2 shows a meridional section through a third embodiment and

3 shows a cross section through this third embodiment.

1 shows the converter base plate 2, which supports the base 1 of the converter made of refractory material. This base plate 2 is pierced by an opening 3, in which a connection piece provided overall with the reference numeral 4 is seated. This connecting piece 4 has an axial bore: · 5 " - a multitude of channels 6, the role of which will be explained in more detail below.

In the axial bore 5 of the connecting piece 4, the two are concentric Pipes 7 and 8 arranged, which form the actual blower nozzle. In the embodiment under consideration these pipes made of copper; the inner tube has an inner diameter of 12 mm and an outer diameter of 14 mm, while the tube 8 has an inner diameter of 20 mm and an outer diameter of 22 mm. In the inner tube 7, its length is slightly larger than that of the pipe 8, for example pure oxygen is blown and through the pipe 8 (i.e. through the one between it and the annular gap formed in the pipe 7) a gaseous coolant is blown. Both tubes 7 and 8 end at their base in truncated cones 9 and 10.

009847/0948

At the bottom of the connecting piece 4, a block, provided overall with the reference numeral 11, is welded at 37, which block forms an enclosure provided with two chambers 12 and 13. The chamber 12 is supplied with a gaseous oxygen carrier (for example pure oxygen) through the inlet 14, and the chamber 13 is charged with a gaseous coolant (for example water vapor) through the inlet 15.

The tubes 7 and 8 are fed by injectors 28 and 16, respectively.

The injector 16 for the gaseous coolant has on his Base on an opening, which successively a cylindrical Thread cross-section 17, a frustoconical tapering smooth cross-section 18 and smooth cylindrical Has cross-section 19, and whose cross-section 18 is intended to receive the frustoconical base 9 of the inner tube 7 and which also receives the second injector 28, the head of which is screwed into the thread cross-section 17.

The injector 16 has a shoulder on its lower outer surface 20, which rests against one or more sealing rings 21 made of rubber, which in annular grooves which are incorporated into the inner wall of the block 11 are. The head of the injector 16 has along its axis an opening 22, the diameter of which is greater than that of the Tube 7 is such that the gaseous coolant flow between the injector 16 and this tube and between the pipe 7 and the pipe 8 can enter (in the considered Embodiment, the diameter of the opening 22 is 18 mm.)

The outer surface of the head of the injector 16 is provided with a rounded section 23, which rests against the frustoconical base 10 of the tube S , and with a flat shoulder 24, which rests against the supports 4.

009847/09 * 8

BATH ORIGINAL

The injector 16 has, inter alia, a plurality of radial holes 25 through which the cooling gas, which through the inlet 15 is fed into the chamber 13, is introduced into the injector, and from where it flows between the tubes 7 and 8. The injector 16 screws through the thread 26 into the block 11 if you turn its lower part 27 until the Paragraph 24 comes to rest against the nozzle 4. At the same time, the rounded section 23 blocks the frustoconical Base 10 of the tube 8 against the nozzle 4 without excess.

The oxygen carrier injector 28 has a plurality of radial holes 29 through which the gas, which was released via chamber 12 through inlet 14, into these can flow into the injector and from there through an axial opening 30 into the inner tube 7. The diameter of this axial opening 30 is equal to the micrometer of the pipe 7 » i.e. 12 mm in the exemplary embodiment under consideration.

The outer surface of the head of the injector 2b, like that of the injector 16, has a rounded section 31, which rests against the frustoconical base 9 of the tube 7, and a flat shoulder 32 which rests against the base of the frustoconical cross-section 18 of the injector 16. The seal between the injector 23 and the block is effected by one or more sealing rings 33 made of rubber. The base of the injector 28 is normally closed by a screw plug 34, which if necessary by turn your head 35 with six wrench flats can.

The injector 28 acriraubt itself in the Gewiride cross section 17 of the Injector 16, if you turn its lower part 36 so far, To you; aoc flat shoulder 32 against the base of the conical cone-shapedea Wu3r_; chaitfc3 IU the injector 16 comes to rest while the rounded portion 31 the frustoconical base 9

- 10 -

009847/0948

- ίο -

of the tube 7 without excess , the cross-section 18 of the injector 16 blocked.

In a first embodiment, in which the number of blow nozzles is not very large, e.g. less than 40, has each nozzle has its own device for the separate double feed, which consists of a cylindrical casing exists, of which the drawing shows a meridional section in this case. The inlets 14 or

15 with one or more oxygen collector tubes and with one or more coolant collector pipes connected with the help of flexible lines. These two header pipes can advantageously have the shape of a torus.

If the number of air nozzles is greater than above, the number of flexible lines can become a hindrance. In this * 'all a second embodiment is advantageously used, in which a device is placed under each row of blow nozzles with a separate double feed, which consists of a toroidal enclosure, the cross-section of which is shown in FIG corresponds, except for the fact that the nozzle 4 is no longer present η and that the annular block 11 directly to the Bottom plate 2 is welded, the base 10 of the tube 8 now between the rounded portion 23 of the injector

16 and a truncated cone 3 incorporated into the base plate 2 Profile, which is not shown in the drawing, is blocked. There are just as many ring-shaped ones here Blocks 11 exist as rows of blower nozzles. Each ring-shaped The block can then have one or more inlet pairs 14 and 15, which with the help of flexible lines or rigid pipes with supply lines for oxygen on the one hand and gaseous coolant on the other hand are connected. At this second embodiment, however, each blow nozzle always has an injector 16 and an injector 28, both rotatable about the Axis of the nozzle, as in the first embodiment. Single-

00980/0948

borrowed the bezel or block 11 related to the The axis of each blow nozzle was cylindrical in the first embodiment, is now toroidal in the second embodiment with respect to the axis of the converter base.

In both the first and the second embodiment, any loss of oxygen to the outside is prevented by the ring 33. Every Connection between the chambers 12 and 13 is prevented by the ring 21. Eventually, any loss of gas will occur discharged between the base 10 of the outer tube 8 and the nozzle 4 through the leakage channels 6 provided in the nozzle 4 and therefore cannot penetrate through the bottom of the converter. In the second embodiment there is the nozzle 4 not, the leakage channels 6 are here incorporated into the base plate 2 itself and of course open below the base plate to the outside, as already described in the main patent.

Reference is now made to FIGS. 2 and 3 '.'^r> sug showing a third embodiment of the present invention.

A piece 102 is fastened in the base plate 100 of the converter, which on the one hand has a connecting piece 103 which is pierced by a cylindrical hole and into the base plate 100 is inserted, and on the other hand a guide tube 104, which has expansion slots 105 and after the bottom plate 100 is open on the opposite side.

In this guide tube 104 slides from the two tubes

106 and 107 and the assembly with the two chambers 109 and 110 forming piece 108, which the Contains injectors 111 and 112, the head of which is in sealing Way against the base parts 113 or 114 of the tubes 106 or

107 places.

■ \ 9 -

009847/0948

The gaseous oxygen carrier, for example pure oxygen, penetrates through the inlet 115 into the chamber 109 after it has been supplied through a flexible line ( not shown). The gaseous coolant, for example water vapor, flows through the inlet 116 into the chamber 110 after it has been supplied through a flexible line, not shown.

Between the end face 117 of the stack 108 and the inner floor 118 of piece 102 is a coil spring 119 or any other suitable resilient element is arranged, which is supported against the bottom 118.

On the other side of the piece 108, recesses 120 machined into the guide tube 104 allow it to be pushed through two transverse pins serving as a stop for the movable unit, which are on both sides of the cleaning screw 121 run past so as not to hinder the disassembly.

Finally, inside the piece 108, ring seals 122 ensure the seal at the necessary locations.

The helical spring 119 is designed and constructed in such a way that it is directed upwards with respect to the figure without attack Tensile force on the outer tube 107 that the piece 108 forming the enclosure with the two / one chambers strikes against the two pins, without exerting a greater force on it than by its weight, the spring being completely relaxed in this position and that the maximum tensile force in the upward direction with respect to the figure which the tube 107 normally is less than the total compressive force of the spring 119 against the floor 118.

In this way the movable unit has all the flexibility desired to avoid any tearing or breaking of the pipe 107 to avoid.

0098 / .7 / 09Ä8

The invention is not limited to those shown and described Limited execution forms.

The invention can also be used not only in the bases of converters for the Irish of steel, but also in
all devices that have a separate double feed, such as reaction vessels, condensers, heat exchangers,
Burners, and the like. In which a certain flexibility of the tubes is necessary for special reasons in each case.

Claims;

- 14 ~
009847/0948

Claims (14)

Claims 1. Device for acting on the BlaslJÜuraasara one Stahlkonverterbodena according to patent application P 17 53 590.9-24, with a separate double feed for the blow nozzles, which have two concentric metal tubes for each blow hole, characterized in that it has an enclosure (11; 108) with two separate chambers (12,13; 109,110), which each have at least one injector (28,16; 111,112) circular act upon its head in a sealing manner against the base (9,10; 113,114) of that of the two tubes (7,8; 106,107) is applied to each nozzle that it feeds. 2. Apparatus according to claim 1, characterized in that each blow nozzle has its own two-chamber enclosure (11; 108), which is preferably cylindrical, and that each of the two chambers (12,13; 109,110) with one Collector pipe for the corresponding gas is connected via a flexible line or a pipe of small diameter. 3. A device according to claim 1, characterized in that each row of nozzles has its own two-chamber enclosure, which is preferably formed torusförraig and with respect to each nozzle of the _t two injectors each connected with a particular chamber (12 bzw.13) (28 or 16) is penetrated, and each of the chambers (12, 13) is acted upon at one or more points (14, 15) of its circumference by any suitable means such as pipes or flexible supply lines. 4. Device according to one of claims 1 to j, characterized characterized in that the injector (28; 111) joder Blowing nozzle which acts on the inner tube (7; 106) is provided with a lock according to patent application P 17 58 590.9. - 15 009847/0948 5. Device according to one of claims 1 Ms 3, characterized in that the burner (28; 111) of each blow nozzle which acts on the inner tube (7; 106) is closed at its base by an optionally unscrewable screw plug (34; 121 ) is. 6. Device according to one of claims 1 to 5, characterized in that the base (9, 10; 1 13, 114) of the tubes (7, 8; 106, 107) of the blow nozzles is frustoconical and with one on each of the heads of the corresponding injectors ( 28,16; 111,112) provided frustoconical profile cooperates sealingly. 7. The device according to claim 2, characterized in that the two-chamber enclosure (11) to one Stub (4) is welded, which is let into an opening (3) of the converter base plate (2). 8. Apparatus according to claim 7 »characterized in that the connecting piece (4) eiren or several ins Has free opening ^ and channels (6) serving as leakage channels. 9. Apparatus according to claim 3, characterized in that the enclosure (11) directly to the converter base plate (2) is welded, in which leakage channels opening out to the outside are provided below this base plate (2). 10. The device according to claim 1, characterized in that the two-chamber enclosure (108) with the two tubes (10b, 107) of the blow nozzle is firmly connected and rigidly connected to the converter base plate (100) in one Guide tube (102,103,104) can slide, whereby the end face the enclosure (108) is supported by an elastic element (119) which is / re ^ en and / or in the base plate (100) - 16 - 009847/0948 wedges is while its lower surface against a stop system (120) comes to the plant " 11. The device according to claim 10, characterized in that the elastic iilement (119) is a helical spring system. 12. The device according to claim 10, characterized in that g e k e η η that last elastic Clement (119) a set of disc springs !! is. 13t device according to claim 10, characterized geke η η - • ζ jich π et, nr.n the stop system (120) of one or more queiveri ch lc th and durci in the guide tube (104) Vüiv'iaehene Aussix; run.on (120) ;; tecl;: bar pins is formed. 14. The device according to claim 10, characterized in that Ic <: η η - ?, Q i c Ii h (t, dnL d. !! .-; elastic? ^ Lenient is such that.-i die Two. — lifinüuoj' — rjj version (iüö) in the absence of the g-egej] the convoy floor (100) directed tensile force on the automatic hohr (107) on the attachment system (120) without any greater pressure than his own weight, and that the elastic cladding (119) is completely desjjaunted, and that the maximum force against the converter base (100), which is the outer ear (107) is normally exposed to less than the full - ^ ruckkrait of the elastic clement (11 ^) against the converter base (100). 0 (J 9 8 A 7/0 9 A 8 BATH ORIGINAL