EP0007418A1 - Dispositif pour l'alimentation des tuyères d'un convertisseur métallurgique en hydrocarbures gazeux et/ou liquides - Google Patents

Dispositif pour l'alimentation des tuyères d'un convertisseur métallurgique en hydrocarbures gazeux et/ou liquides Download PDF

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Publication number
EP0007418A1
EP0007418A1 EP79101915A EP79101915A EP0007418A1 EP 0007418 A1 EP0007418 A1 EP 0007418A1 EP 79101915 A EP79101915 A EP 79101915A EP 79101915 A EP79101915 A EP 79101915A EP 0007418 A1 EP0007418 A1 EP 0007418A1
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EP
European Patent Office
Prior art keywords
pressure
gaseous
rotatable
hydrocarbons
converter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP79101915A
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German (de)
English (en)
Other versions
EP0007418B1 (fr
Inventor
Hans-Georg Dr. Fassbinder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kloeckner CRA Patent GmbH
Original Assignee
Eisenwerke Gesellschaf Maximilianshuette mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eisenwerke Gesellschaf Maximilianshuette mbH filed Critical Eisenwerke Gesellschaf Maximilianshuette mbH
Priority to AT79101915T priority Critical patent/ATE80T1/de
Publication of EP0007418A1 publication Critical patent/EP0007418A1/fr
Application granted granted Critical
Publication of EP0007418B1 publication Critical patent/EP0007418B1/fr
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters

Definitions

  • the invention relates to a method and a device for supplying nozzles from concentric tubes with gaseous and / or liquid hydrocarbons, wherein oxygen or oxygen-containing gases are simultaneously passed through the nozzles into a converter.
  • German patent 2 200 413 describes the use of the same nozzles in a converter above the bath surface. Gaseous and / or liquid hydrocarbons are also used as the nozzle protection medium.
  • German patent application P 27 56 432 relates to a method for increasing the scrap rate in steel production in the OBM converter.
  • the usual oxygen injection nozzles are initially operated as oil-oxygen burners for preheating scrap.
  • gaseous hydrocarbons for example methane and propane
  • methane and propane are used as the nozzle protection medium.
  • the quantities of oil required for preheating the scrap which are of course higher than the quantities of the nozzle protection medium, can be passed through the same annular gap in the oxygen inlet nozzles as the gaseous hydrocarbons used to refresh the steel.
  • the gaseous hydrocarbons have proven to be problem-free in operational handling when used as protective media in steel production, while oil products are particularly suitable for preheating scrap.
  • a further device for the controlled supply of a fresh gas and a fluid protective medium according to the German patent 23 26 754 contains considerable improvements for the safety control of the nozzle protection medium, but for example the control valve shows a similar inclination to jamming as the piston valve. This also results in a deterioration in the fine regulation of the quantity of nozzle protection medium.
  • the solution to this problem consists in a method that increases the operational safety when using gaseous and / or liquid hydrocarbons, the hydrocarbon quantity control devices and the distribution devices for the individual supply of the nozzles with gaseous and / or liquid hydrocarbons in one unit with the rotary union be summarized at the converter and a safety control device is installed downstream of it in each nozzle line for the gaseous hydrocarbons.
  • the ancestor according to the invention in which the hydrocarbon quantity control devices for gaseous and liquid hydrocarbons and the distribution on individual nozzle supply lines are combined in one assembly with the rotating union on the converter, hereinafter referred to as a rotatable control unit, and in the nozzle lines for gaseous hydrocarbons, one safety control unit with several each Functions, hereinafter referred to as safety control device, has a number of advantages over the known methods for supplying the nozzles with hydrocarbons. Up to the rotatable control unit, the hydrocarbons are only led in a manifold.
  • a manifold for the gas for example methane, propane, and for the liquid, for example oil
  • the manifolds have a sufficient cross-section for the maximum flow rate with widely differing flow rates.
  • the quantity control device in the rotatable control unit allows this method of operation without any problems. Accordingly, when using liquid hydrocarbons, e.g. ⁇ 1, to be moved.
  • the method according to the invention has particular advantages when alternating use of gaseous and liquid hydrocarbons.
  • the rotating control unit has two separate control and distribution devices for this application.
  • the quantity control device for the hydrocarbons can be controlled as desired during the operating time. It works synchronously for all nozzles in the converter.
  • Another advantage of the method according to the invention is the relatively short, individual supply lines for liquid and / or gaseous hydrocarbons to each nozzle.
  • Starting from the rotatable control unit on the converter pin only the short distances between the converter pin and the nozzles have to be bridged by corresponding lines for each nozzle.
  • These individual nozzle supply lines can be designed for a minimal cross-section, so that at maximum throughput rates a maximum pressure loss of about 0.2 atü for gaseous hydrocarbons and of about 1 atü for liquid hydrocarbons is not exceeded. This results in relatively small volumes in the lines, and these small dead volumes have a favorable effect on the entire control system.
  • control responds almost without inertia, and when switching to hydrocarbon-free nozzle cooling media, e.g. nitrogen, air, argon, only short line sections need to be blown out during the converter idle times, ie the residual hydrocarbon quantities in the individual nozzle lines are small.
  • hydrocarbon-free nozzle cooling media e.g. nitrogen, air, argon
  • the rotatable control unit according to the invention is composed in principle of a stationary housing which is, for example, firmly connected to the bearing block of the converter, and a rotatable device part which is guided completely or at least partially centrally in the stationary housing.
  • the rotatable device part is mounted on the converter pivot and thus follows the converter rotation.
  • the rotatable part of the device essentially consists of the quantity regulating elements which are integrated with the distribution device on the individual nozzle feed lines for gaseous and / or liquid hydrocarbons.
  • the quantity is regulated in a manner known per se by changing the flow cross section before the hydrocarbons enter the individual nozzle supply lines.
  • the change in cross section is effected by a control piston which is sealed against the stationary housing by means of conventional seals and with intermediate vents.
  • the axial piston displacement results in a pressure-controlled diaphragm plate, which is moved by a conventional electropneumatic control unit, in the stationary housing. According to the invention, this diaphragm plate is in engagement with the control piston via an axial bearing.
  • An advantageous embodiment of the device according to the invention is to design the control piston mentioned so that it acts directly as a hydraulic piston.
  • the axial movements of the control piston are then caused by the pressure of a hydraulic fluid between the stationary housing part and the rotatable control piston.
  • the pressure of the hydraulic fluid required to produce the desired axial movements of the control piston is set by a commercially available electropneumatic control device or hydraulic control unit.
  • the safety control elements in the individual supply lines for gaseous hydrocarbons are connected to the rotatable device part on the rotatable control unit. This only results in the need to transmit the required control pressure for the safety control elements from the stationary to the rotatable part of the control unit.
  • electrical signals for display and control purposes can be passed in an uncomplicated manner from the safety control elements via corresponding electrical sliding contacts on the rotatable control unit.
  • the rotatable control unit can have a passage arranged centrally in the axis of rotation.
  • This central passage is sealed gas-tight against all systems of the rotatable control unit.
  • the passage can be used, for example, as an additional supply line for the converter with any media or as a measuring line.
  • Said central passage may further includes a plurality - in the form of concentric lines, for example pipes, which are also sealed against each other, aufnelimen. For example, it has proven to be useful to run three pressure measuring lines in the form of concentric tubes through the central bore of the rotatable control unit for control measurements at the bottom nozzles of a converter.
  • the safety control element in each nozzle line for the gaseous hydrocarbons represents an interrelated combination of pressure relief and non-return valve with differential pressure switch. It essentially has three movable diaphragm plates, the position of which is determined by the pressures prevailing in five separate pressure chambers.
  • This safety controller regulates the pressure of the gaseous hydrocarbons at the nozzles and the prevailing oxygen pressure at each nozzle, and at the same time acts as a check valve as soon as Oxygen, ie a higher pressure, gets into the nozzle ring gap.
  • it monitors the flow rate of gaseous hydrocarbons through the nozzles, which results from the pressure comparison of the gas before and after the flow regulator. As soon as this pressure difference falls below a minimum value, an electrical warning or control signal is triggered.
  • the pressure difference can also be transmitted and displayed as an analog value. This allows the nozzle supply with hydrocarbons and the function of the safety control elements to be monitored in a simple manner.
  • the rotatable control unit consists of the stationary housing 1, hatched in FIG. 1, and the rotatable device part 2, cross-hatched in FIG. 1.
  • the manifold 3 for the gaseous hydrocarbons is welded to the fixed housing 1. From the distribution space 4, the gaseous hydrocarbons flow through the holes 5 in the rotatable device part to the connecting lines 6 in the safety control element 7 and from there into the individual nozzle lines for gaseous hydrocarbons 8.
  • the safety control elements 7 in each nozzle line for gaseous hydrocarbons are with the rotatable device part 2 firmly connected and accordingly also follow the converter rotation.
  • the quantity regulating elements at the inlet openings of the hydrocarbons from the distribution space [4] into the bores [5] consist of a conical bore [9] into which the regulating pins [10] are immersed.
  • the immersion depth of the regulating pins [10] in the conical bores [9] gives the free cross section for the gaseous hydrocarbons that determines the gas quantities.
  • the regulating pins [10] are firmly connected to the control piston [11], which can perform an axial movement.
  • the regulators thus take on the function of a control valve for the total flow of protective media as well as the equal distribution of this flow on the individual nozzles.
  • the axial displacement of the control piston [11] is carried out by a pneumatic control known per se, which essentially consists of the diaphragm plate [12] and the control unit [13].
  • the diaphragm plate [12] is coupled to the control piston via the thrust bearing [14].
  • the spring [15] presses the diaphragm plate [12] in the axial direction into the pressure chamber [16] until the regulating pins [10] close the conical bores [9].
  • the electropneumatic control unit [13] regulates the pressure in the pressure chamber [16] in such a way that the membrane plate [12] assumes the desired position, which is communicated to the control unit [13] by an electrical signal.
  • the control unit [13] monitors the desired position of the diaphragm plate [12] by means of the mechanical position transmitter [17], which is connected to the control unit [13].
  • the pressure chamber [16] is sealed with a membrane [18] against the unpressurized space [19] in which the spring is also located.
  • the other seals for example [20], between the actuating cylinder and the diaphragm plate are conventional sealants.
  • two seals are advantageously combined with an unpressurized intermediate vent, for example seal (21, 22) and intermediate vent (23).
  • the liquid hydrocarbons are fed to the rotatable control unit via the manifold [24]. They flow through the ring channel [25] in the rotatable part of the device and reach the distribution chamber [26] for liquid hydrocarbons. From there they flow into the individual nozzle lines [29] via the flow regulating elements, consisting of the conical bores [27] and the regulating pins [28]. The quantity of liquid hydrocarbons is regulated by the same pneumatic control unit [13] in connection with the diaphragm plate [12] and the control piston (11).
  • a line [8] for gaseous hydrocarbons and a line [29] for liquid hydrocarbons lead to each nozzle.
  • Each of these lines is assigned a volume regulator, consisting of a conical bore [9], [27] and regulating pin [10], [28].
  • the rotatable device part [2] is supported against the stationary housing [l] via the axial bearings [30].
  • the electrical display and control voltages are transmitted from the rotatable device part [2] to the stationary housing [1] by means of the sliding contact unit [31].
  • the sliding contact unit [51] is required to transmit the electrical signals from the individual safety control elements.
  • the control pressure for the line [32] on the safety control element is led via the supply line on the stationary housing [1] to the rotatable ren device part [2] and from there to the safety control element [7]. Such a route is partially shown.
  • the rotatable control unit shown also has a central bore [42].
  • the connection [43] is located on the stationary housing [1] and the connection [44] for this central bore [42] on the rotatable device part [2].
  • This line which is completely sealed against the other systems of the rotatable control unit by means of the seals [45] and [46] and the intermediate vent [47], a further medium or a control pressure can be supplied to the converter, or this line can be left use for pressure measurements on the converter.
  • the rotatable control unit according to FIG. 1 represents a preferred embodiment of the device according to the invention for the supply of gaseous and liquid hydrocarbons to the converter nozzles. It can also be used for two different gaseous or liquid hydrocarbons.
  • the cross sections for the quantity regulation are of course to be adapted to the flow rates.
  • the rotating control unit can also be used for a variety of hydrocarbons, for example liquids or gases. It has proven useful to use a correspondingly simplified version of the rotatable control unit for supplying a converter with a type of hydrocarbon. Then only one set of flow regulators and only one individual line for each nozzle is required.
  • the safety control member (7) shown in Fig. 2 consists essentially of the three diaphragm plates (50), (51) and (52) and the five pressure chambers (53), (54), (55), (56) and (57). Each of the three membrane plates (50), (51), (52) is sealed with sealing membranes (58), (59), (60) against the housing (61) of the safety control element.
  • the set hydrocarbon quantity for the individual nozzle flows from the rotatable control unit to the safety control element via line (6). Accordingly, the same gas pressure prevails in the pressure chamber (53) as in the feed line (6). This pressure is also communicated to the pressure chamber (53) on the membrane plate (52) via the connection (62).
  • the pressure in the pressure chamber [53] also prevails in the pressure chamber [55].
  • the pipeline leads via the connection [62], the opened seal [63] and the hole [64] in the diaphragm plate [51] to the pressure chambers [53] and [55].
  • the diaphragm plate [50] which works against the spring force of the spring [65], releases a passage cross-section [68] on the seal [67] via the connecting piece [66]. Via this passage cross section [68], the hydrocarbon gas flows from the line [6] via the pressure chamber [53] into the pressure chamber [54] and leaves it via the outlet opening [69] and finally reaches the nozzle through the individual nozzle line [8].
  • the safety control element now acts as a servo-controlled check valve. This is because the inlet pressure via [55] opens on the diaphragm [58] and the outlet pressure via [54] closes the valve disk [70]; in addition, a spring [65] has a closing effect. Force equilibrium is reached when the inlet pressure [55] is 0.2 bar higher than the outlet pressure [54]; the spring [65] is designed accordingly. This gives a constant pressure drop of 0.2 bar at the passage cross-section. This reliably prevents media from flowing back from the pressure chamber [54] into the pressure chamber [53], ie in the opposite direction of flow.
  • the pressure chamber [56] is connected to the oxygen pressure of the nozzle via the feed line [71]. Normally, the oxygen pressure is communicated to the pressure chamber [56] via a pressure transmitter with an inert gas, for example nitrogen.
  • an inert gas for example nitrogen.
  • Another function of the safety control element is to compare the hydrocarbon pressure in the pressure chamber [54] with the oxygen pressure at the nozzle and in any case to set the hydrocarbon pressure lower than the oxygen pressure.
  • the diaphragm plate [51] changes its position and the seal [72] opens so that a connection between the pressure chamber [56] and the pressure chamber [55 ] consists.
  • the seal [63] closes and blocks access from the pressure chamber [53 ] via the feed [62] to the pressure chamber [55].
  • the membrane plate [51] works with a so-called flip-flop characteristic, ie either the seal seals [63] and the seal [72] is open or vice versa.
  • the membrane plate [50] compares this pressure with the pressure chamber [54] in the manner described, and only when there is a sufficiently large pressure difference between the two pressure chambers can the hydrocarbon gas escape reach the pressure chamber [53] via the flow area [68J into the pressure chamber [54].
  • the interaction of the diaphragm plates [50] and [51] makes the lower pressure from the pressure chambers [53] or [56] effective in order to set a sufficient pressure difference between the pressure chambers [54] and [55], i.e. the pressure of the hydrocarbon gas in the line [69] is below the lower gas pressure in the pressure chamber [53] or [56] in each operating case.
  • the safety control device also monitors the flow rate of the gaseous hydrocarbons and triggers a signal as soon as a minimum amount is undershot. This is done to fulfill this function Pressure chamber [57] to the pressure of the gaseous hydrocarbons as it prevails in front of the volume regulating element in the rotatable control unit in the distribution space [4]. As long as the pressure in the pressure chamber [57] is higher than in the pressure chamber [53], the diaphragm plate [52] is in the position shown. This is the normal operating case.
  • the diaphragm plate [52] changes, supported by the spring force of the spring [73 ], its location.
  • the permanent magnet [74] thus approaches the magnetic switch [75] and switches on an electrical signal.
  • the pressure difference at the flow regulator is a direct measure of the flow rate of the gaseous hydrocarbons. In practice, it has proven to be advantageous to trigger this signal at a differential pressure of 0.05 atü, which can be set by means of a corresponding spring [73].
  • the electrical signal is routed via the described sliding contact unit [31] on the rotatable control unit to any display point, for example in the converter control room.
  • the pressure difference between the pressure spaces (57) and (53) can also be transmitted and displayed analogously.
  • the membrane plate (52) then takes over the function of a conventional differential pressure measuring device.
  • the analog differential pressure display instead of a signal at critical differential pressure is a way to continuously monitor the supply of hydrocarbons to the nozzles and the function of the safety control.
  • the safety control device shows in particular how the control elements for the pressure limitation with the servo check valve and the differential pressure switch are summarized.
  • the structural design of this unit naturally differs from this largely schematic representation.
  • the connections for the gaseous hydrocarbons and the control pressures are combined in one level.
  • the connecting lines to the individual pressure rooms are largely realized through holes in the housing.
  • double membranes are sometimes used to better guide the membrane plates and to support the control function.
  • Alternative embodiments, in particular with regard to the structural design of the safety control element, are within the scope of the invention.
  • the arrangement of the safety control element upstream of the nozzle in front of the rotatable control unit offers, in addition to the advantages described, a further considerable advantage. If, during operation of the nozzles, gases under a higher pressure, such as oxygen, flow into the nozzle feed lines, the safety control element reacts in the manner described, for example as a servo check valve, and thus protects the rotatable control unit. In previous operating practice, it has proven to be particularly disadvantageous if similar control and monitoring devices are housed in rooms that are no longer at risk of temperature, away from the converter. In the event of malfunctions, damage occurs on the relatively complicated multiple rotary unions.
  • FIG. 3 shows an oxygen through-blowing converter, consisting of a sheet steel jacket 80 with the refractory lining 8 1 .
  • the gas collecting hood 83 is arranged, with which the converter exhaust gases are fed to the gas cleaning system, not shown.
  • the converter 80 is non-positively connected to a converter support ring 84.
  • the two pivot pins 85 and 86 are located on the converter support ring 84.
  • the pivot pins 85 and 86 are mounted in the bearings 87 and 88 and enable the converter to rotate.
  • the drive for the converter rotary movement is carried out by motors and gears in the structural unit 89.
  • the converter drive 89 and the bearings 87 and 88 are fixedly connected to the concrete foundation 91 by mounting blocks 90.
  • Nozzles 94 are located in the floor lining 92 on the bottom plate 93 of the oxygen blow-through converter.
  • the central tubes of the nozzles 94 constructed from two concentric tubes are supplied with oxygen and dust-like slag formers via the manifold 95 and the suspension distributor 96.
  • the feed line 95 passes through the pivot pin 85 and a rotary feedthrough, not shown, to the suspension distributor 96.
  • the annular gaps of the nozzles 94 are supplied with liquid or gaseous hydrocarbons.
  • the pressure-controlled switch valve 97 on the nozzle flange 98 switches the hydrocarbon supply as a function of pressure.
  • Each nozzle has a separate line for gaseous - 99 and liquid hydrocarbons 100.
  • the nozzle supply lines 99, 100 for gaseous and liquid hydrocarbons are led upstream through the converter pivot 86 to the control device 101 according to the invention.
  • the device .101 is shown approximately to scale and is firmly connected to the converter pivot 86.
  • FIG. 4 shows a further embodiment of the device for supplying the nozzles with gaseous and / or liquid hydrocarbons.
  • the device is supplied with gaseous hydrocarbons through the manifold 105 and with liquid hydrocarbons through the manifold 106.
  • the hydraulic fluid is fed to the device through the line 107.
  • the control piston 108 of the device is moved in the axial direction according to the control commands and regulated by the hydraulic control unit 109.
  • the other functions of the device shown in FIG. 4 correspond to those shown in FIG. 1.
  • An OBM converter with a capacity of 60 t and 10 floor nozzles is used to produce steel with an increased scrap rate. To do this, first load 22 t of scrap into the empty converter and use the floor nozzles as an oil-oxygen burner for preheating.
  • the oil collecting line 24 is fed to the rotatable control unit with an oil quantity of 75 l / min and a pressure of 30 atm. This quantity of oil is distributed evenly over the annular gaps of the 10 nozzles via the quantity regulating members 27 and 28. The oil gets through the individual
  • the converter After the preheating period has ended, the converter is charged with 44 t of pig iron.
  • the oil supply to the manifold [24] is already interrupted at this point, and nitrogen flows through the annular gap of the nozzles and is supplied via the manifold [3] and the nozzle supply lines [8].
  • the pressure-controlled T-relay on the nozzle flange switched over at this point in time, as the higher pressure is now present on the individual nozzle supply lines for Gaa.
  • the pressure drop in the volume control unit is approx. 3 atm.
  • the propane reaches the nozzles via the safety control elements.
  • the safety control elements operate in the manner shown in FIG. 2 and described above.
  • the pressure drop between pressure chamber [53] and [54] is approx. 0.2 atm.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
EP79101915A 1978-06-13 1979-06-13 Dispositif pour l'alimentation des tuyères d'un convertisseur métallurgique en hydrocarbures gazeux et/ou liquides Expired EP0007418B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79101915T ATE80T1 (de) 1978-06-13 1979-06-13 Vorrichtung zur versorgung von konverterduesen mit gasfoermigen und/oder fluessigen kohlenwasserstoffen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2825851A DE2825851B1 (de) 1978-06-13 1978-06-13 Vorrichtung zur Versorgung von Duesen mit gasfoermigen und/oder fluessigen Kohlenwasserstoffen
DE2825851 1978-06-13

Publications (2)

Publication Number Publication Date
EP0007418A1 true EP0007418A1 (fr) 1980-02-06
EP0007418B1 EP0007418B1 (fr) 1981-06-10

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EP79101915A Expired EP0007418B1 (fr) 1978-06-13 1979-06-13 Dispositif pour l'alimentation des tuyères d'un convertisseur métallurgique en hydrocarbures gazeux et/ou liquides

Country Status (4)

Country Link
US (1) US4261551A (fr)
EP (1) EP0007418B1 (fr)
AT (1) ATE80T1 (fr)
DE (2) DE2825851B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070791A1 (fr) * 1981-07-20 1983-01-26 MecanARBED Dommeldange S.à r.l. Joint tournant à raccords multiples
EP0084707A2 (fr) * 1982-01-26 1983-08-03 Pennsylvania Engineering Corporation Récipient métallurgique
DE3624966A1 (de) * 1986-07-24 1988-01-28 Mannesmann Ag Metallurgisches gefaess mit kippzapfen, insbes. stahlwerkskonverter
DE102012101815A1 (de) * 2012-03-05 2013-09-05 GAT Gesellschaft für Antriebstechnik mbH Drehdurchführung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5188661A (en) * 1991-11-12 1993-02-23 Cook Donald R Dual port lance and method
AT408634B (de) * 1997-04-04 2002-01-25 Trodat Gmbh Stempelkissen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2161000C3 (de) * 1971-12-09 1975-04-17 Eisenwerk-Gesellschaft Maximilianshuette Mbh, 8458 Sulzbach-Rosenberg Verfahren und Vorrichtung zur gleichmäßigen Zuteilung und wechselweisen Zuführung von flüssigen oder gasförmigen Schutzmedien für Frischgasdüsen in einem Konverter
US3893658A (en) * 1971-12-29 1975-07-08 Pennsylvania Engineering Corp Multiple gas feed rotary joint for metallurgical vessels
DE2559302B2 (de) * 1975-01-22 1977-12-22 Creusot-Loire, Paris; Sprunck, Emile, Moyeuvre-Grande, Moselle; (Frankreich) Drehbare rohrverbindung
DE2326754C3 (de) * 1973-05-25 1978-04-20 Eisenwerk-Gesellschaft Maximilianshuette Mbh, 8458 Sulzbach-Rosenberg Vorrichtung zum gesteuerten Zuführen eines Frischgases und eines fluiden Schutzmediums

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1253581A (en) * 1968-02-24 1971-11-17 Maximilianshuette Eisenwerk Improvements in processes and apparatus for making steel
LU58309A1 (fr) * 1969-02-27 1969-07-15
US4139368A (en) * 1977-10-11 1979-02-13 Pennsylvania Engineering Corporation Metallurgical method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2161000C3 (de) * 1971-12-09 1975-04-17 Eisenwerk-Gesellschaft Maximilianshuette Mbh, 8458 Sulzbach-Rosenberg Verfahren und Vorrichtung zur gleichmäßigen Zuteilung und wechselweisen Zuführung von flüssigen oder gasförmigen Schutzmedien für Frischgasdüsen in einem Konverter
US3893658A (en) * 1971-12-29 1975-07-08 Pennsylvania Engineering Corp Multiple gas feed rotary joint for metallurgical vessels
DE2326754C3 (de) * 1973-05-25 1978-04-20 Eisenwerk-Gesellschaft Maximilianshuette Mbh, 8458 Sulzbach-Rosenberg Vorrichtung zum gesteuerten Zuführen eines Frischgases und eines fluiden Schutzmediums
DE2559302B2 (de) * 1975-01-22 1977-12-22 Creusot-Loire, Paris; Sprunck, Emile, Moyeuvre-Grande, Moselle; (Frankreich) Drehbare rohrverbindung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070791A1 (fr) * 1981-07-20 1983-01-26 MecanARBED Dommeldange S.à r.l. Joint tournant à raccords multiples
EP0084707A2 (fr) * 1982-01-26 1983-08-03 Pennsylvania Engineering Corporation Récipient métallurgique
EP0084707A3 (en) * 1982-01-26 1983-08-10 Pennsylvania Engineering Corporation Metallurgical vessel
DE3624966A1 (de) * 1986-07-24 1988-01-28 Mannesmann Ag Metallurgisches gefaess mit kippzapfen, insbes. stahlwerkskonverter
DE102012101815A1 (de) * 2012-03-05 2013-09-05 GAT Gesellschaft für Antriebstechnik mbH Drehdurchführung

Also Published As

Publication number Publication date
ATE80T1 (de) 1981-06-15
EP0007418B1 (fr) 1981-06-10
DE2825851B1 (de) 1979-12-20
DE2960401D1 (en) 1981-09-17
DE2825851C2 (fr) 1980-08-21
US4261551A (en) 1981-04-14

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