EP0799323A1 - Kippbares metallurgisches aggregat bestehend aus mehreren gefässen - Google Patents
Kippbares metallurgisches aggregat bestehend aus mehreren gefässenInfo
- Publication number
- EP0799323A1 EP0799323A1 EP95942719A EP95942719A EP0799323A1 EP 0799323 A1 EP0799323 A1 EP 0799323A1 EP 95942719 A EP95942719 A EP 95942719A EP 95942719 A EP95942719 A EP 95942719A EP 0799323 A1 EP0799323 A1 EP 0799323A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vessel
- melting
- treatment
- metallurgical
- melting vessel
- 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
Links
Classifications
-
- 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
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5252—Manufacture of steel in electric furnaces in an electrically heated multi-chamber furnace, a combination of electric furnaces or an electric furnace arranged for associated working with a non electric furnace
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/04—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/06—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement
- F27B3/065—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement tiltable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/18—Arrangements of devices for charging
- F27B3/183—Charging of arc furnaces vertically through the roof, e.g. in three points
- F27B3/186—Charging in a vertical chamber adjacent to the melting chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/19—Arrangements of devices for discharging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1509—Tapping equipment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
- F27B3/085—Arc furnaces
Definitions
- the invention relates to a tiltable metallurgical unit for melting metallic feed material, in particular iron-containing material, and for post-treating the metal melt.
- the entire assembly consisting of the shaft furnace part and the hearth furnace part can be tilted, specifically perpendicular to a horizontal axis connecting the center of the shaft furnace part and the center of the stove furnace part.
- the stove section has an eccentrically arranged floor cut for the steel and a work door in a side wall for removing the slag.
- Both the lower part of the shaft furnace part and that of the hearth furnace part have a circular interior in plan, the interior of the shaft furnace part approximately affecting the interior of the hearth furnace part in plan and the transition from one room to the other is narrowed.
- An arc unit serves as the heating device of the hearth furnace part, while a plurality of plasma burners, which are arranged distributed along the circumference in the lower region of the shaft furnace part, serve as the heating device for the shaft furnace part.
- the bottom recess of the shaft furnace part is relatively shallow and the upper edge of the overflow weir has a small height compared to the bottom recess, so that at the beginning of a melting process only a small amount of the pre-melt is retained in the bottom recess of the shaft furnace part and after the formation of the sump, the pre-melt continuously over that Overflow weir flows into the stove section.
- the inclination of the plasma burner is set such that the premelt is overheated in the direction of the overflow weir and on the other hand a plasma burner is provided between the shaft furnace part and the hearth furnace part, so that the premelt can be overheated in the area of the overflow weir and the continuous outflow of the premelt is ensured.
- the metallurgical treatment in the hearth section begins as soon as half the bath depth is reached.
- the melt is heated up to the tapping temperature by additional supply of electrical energy. During this process, premelt flows continuously from the shaft furnace part.
- the tapping weight in the hearth part is reached, the unit is tipped free of slag by tipping the unit via an eccentric bottom tap opening.
- DE-25 04 911-A1 describes a device for melting scrap, sponge iron or the like in a shaft furnace by means of a fuel-oxygen Flame from below and an outlet for the melted material in the bottom of the shaft furnace for continuous steel production have become known, in which a heating vessel attached to the side of the shaft furnace is integrated.
- the shaft furnace has an outlet for molten metal at the deepest point of its base, which is connected to the overheating vessel via a channel and also has a slag drain in the side wall.
- the overheating vessel is provided with an overflow which is located slightly below the height of the slag outlet.
- the liquid metal overheated in the overheating vessel flows continuously over the overflow and is continuously replaced by the liquid metal melted in it via the connecting channel to the shaft furnace.
- the superheating vessel is heated by an arc.
- the invention has for its object to avoid freezing of the melt in the transfer area between the melting and treatment vessel in a metallurgical unit of the type described in the introduction without additional heat energy having to be supplied to this area.
- it should be possible to prevent an impairment of the treatment process of the melt in the treatment vessel caused by the continuous flow of premelt which fluctuates greatly in composition.
- the melting vessel and treatment vessel should be able to be optimally trained and operated independently of one another with regard to their objectives.
- the energy consumption of the unit per ton of metal produced is to be minimized, and the hot exhaust gases from the treatment vessel and also from the melting vessel should be usable for preheating the feed material.
- the unit according to the invention are a melting vessel that a stove for
- a channel between the melting vessel and the treatment vessel which is arranged at such a height that the desired amount of molten metal can be retained in the melting vessel, this can be transferred into the treatment vessel when the unit is tilted.
- the metal melt is therefore not transferred continuously via an overflow weir, but only in batches when the desired amount of metal melt has accumulated in the melting vessel.
- the hot metal melt flows through the channel to the treatment vessel in a short time when the unit is tilted, so that there is no risk of cooling down here.
- the metal melt transferred into the treatment vessel during the previous tilting process is treated metallurgically, so that both processes run parallel to one another, the size and equipment of the melting vessel being able to be optimized with regard to the melting process and the treatment vessel with regard to it on the metallurgical treatment.
- the supply of heat to the two vessels should be coordinated such that the melting time corresponds approximately to the treatment time, so that after the treatment vessel has been tapped off, the metal melt formed in the melting vessel can be transferred into the treatment vessel by tilting the unit and the parallel operation of the two vessels can be continued immediately thereafter. Since the melt formed in the melting vessel does not overflow into the treatment vessel during the melting process, but rather the process of transferring the melt is controlled by the tilting of the unit, the metallurgical treatment in the treatment vessel is not disturbed by the melt flowing in.
- the treatment vessel In order to make the unit compact and also to keep the masses to be moved when tipping as low as possible, it is advisable not to align the treatment vessel with the melting vessel in the direction of tilt or in a direction perpendicular to the axis of tilt of the unit. tes to arrange, but in contrast laterally offset, so that the connection line between the vessel centers and the tilting direction of the unit includes an acute angle in plan view. This angle is preferably approximately 45 °.
- the channel between the two vessels should, however, be arranged so that when viewed from the top of the melting vessel, a line drawn in the tilting direction through the center of the melting vessel still lies within the inlet opening of the channel to the treatment vessel. This point on the circumference of the vessel is at its lowest when tipping and thus enables better emptying of the melting vessel at a given tipping angle.
- the unit can preferably be tilted from its starting position not only in the previously described positive tilting direction, in which the melt can be transferred from the melting vessel into the treatment vessel, but also in the opposite, negative tilting direction in order to enable the vessels to be removed.
- Work openings or slag openings are to be provided at a suitable point.
- the bottom of the connecting channel between the melting vessel and the treatment vessel is so high that the two vessels can be operated in parallel without melt overflowing from the melting vessel into the treatment vessel.
- the bottom of the connecting channel should be higher than the bottom of the melting vessel, which in the starting position of the unit enables the melt in the furnace of the melting vessel to be retained by at least half the capacity of the treatment vessel, preferably the entire capacity of the treatment vessel.
- the bottom of the post-treatment vessel is lower than the bottom of the melting vessel in order to be able to transfer the entire melt from the melting vessel into the treatment vessel when it is tilted.
- the melting vessel will have a larger diameter than the treatment vessel.
- the connecting channel between the two vessels should be designed as an upwardly open channel in a partition made of refractory material between the two vessels.
- arc energy is preferably used, it being advantageous if the electrode structure is arranged on the same tilting frame as the two vessels, so that the electrodes do not have to be removed from the vessels at least when tilting in the negative tilt direction, that is to say when slagging .
- a lifting and swiveling device for at least one electrode is preferably arranged, which can optionally be inserted into the melting vessel and the treatment vessel.
- the hot exhaust gases from the treatment vessel and the melting vessel are expediently used to preheat the feed material to be charged into the melting vessel.
- This can be done in a particularly compact and efficient manner in that the lid of the melting vessel is fastened in a holding structure which at the same time carries a shaft designed as a charge material preheater, the lower opening of which opens into the interior of the melting vessel.
- the hot exhaust gases entering the melting vessel from the treatment vessel via the connecting channel, in particular if this is designed as a channel open at the top, and the hot exhaust gases of the melting vessel are then passed through the shaft through a scrap column that forms in the area below and in the shaft drained upwards and preheat the cargo.
- the shaft can also have blocking members which can be moved from a closed position to hold the cargo in the interior of the shaft into a release position in which they release the passage through the shaft.
- the cargo can be retained in the shaft and the heat utilization can be further improved.
- Fig. 5 shows the section V-V of Figure 1
- the metallurgical unit for melting metallic feedstock and for post-treating the metal melt contains a melting vessel 1 and a treatment vessel 2 connected to it to form a structural unit, which is on the side of the melting vessel 1 is attached.
- the two vessels are fastened in a frame 3, which is tiltably mounted.
- the frame has an oven cradle 5 which can be rolled on a roller track 4, and a hydraulic actuator 6 acting on the frame, with which the unit both rotates about a horizontal tilt axis 7 from the starting position shown in FIGS can be tilted in a positive tilt direction 8 as well as in a negative tilt direction 9 by a predetermined tilt angle.
- the melting vessel 1 is provided with a charging opening 10 for introducing the feed material, which is formed in the vessel lid 11 and contains an oven hearth 12 for receiving molten metal 13.
- the oven hearth 12 made of refractory material, while the upper vessel 14 placed on the stove and the lid 11 consist of water-cooled elements.
- a drain opening 15 for removing the molten metal and a working opening 16 for removing slag from the melting vessel 1 are provided in the side wall of the furnace hearth 12.
- the drain opening 15 lies in the positive tilting direction 8 with respect to the vessel center 17, while the working opening 16 lies in the negative tilting direction 9, so that the metal melt 13 is removed from the furnace hearth 12 during the tilting in the positive direction 8 and during the tilting 9 slag can be removed in the negative direction through the working opening 16.
- the treatment vessel 2 attached to the side of the melting vessel 1 for receiving the metal melt 13 from the furnace 12 is lined with refractory material and, as can be clearly seen in the figures, forms a structural unit with the melting vessel 1.
- the treatment vessel is preferably dimensioned in such a way that that it is able to hold the maximum permissible volume of the molten metal of the melting vessel, the cross section of the treatment vessel being substantially smaller than that of the melting vessel.
- the treatment vessel takes on the function of a pan, has a tap opening 18 in the bottom and optionally gas flushing stones or under-bath nozzles for blowing in treatment gases and solids (not shown) and is covered with a water-cooled cover 19.
- the treatment vessel 2 has an inlet opening 22 for the molten metal and is arranged adjacent to the melting vessel in such a way that in the top view (see FIG. 3) with respect to the center 17 of the melting vessel 1, the connecting line 23 between the vessel centers 17 and 20 with respect to the positive tilt direction 8 one includes an acute angle, which is about 45 ° in the case shown. This makes it possible to move the vessel center points 17 and 20 closer together with respect to the tilting direction and thus to concentrate the masses to be moved.
- FIG. 4 shows, in the non-tilted state of the metallurgical aggregate, that is to say in its starting position, the vessel bottom 24 of the aftertreatment vessel 2 is lower than the vessel bottom 25 of the melting vessel 1, that is to say the furnace hearth 12.
- the drain opening 15 of the melting vessel 1 is connected to the inlet opening 22 of the treatment vessel 2 by a connecting channel 26 which is designed as an upwardly open channel.
- the gutter is constructed in such a way that the lining for the oven and the treatment vessel, the upper edges of which lie in the same plane, is connected by a tangential section 27 between the two vessels and adjacent to this tangential connecting section 27 in the partition wall 28 between the two Vessels the upwardly open channel of the connecting channel 26 is formed.
- the sole 29 of the connecting channel is, as shown in particular in FIG. 4, by a significant amount higher than the bottom 25 of the melting vessel 1. It should be at least so high that in the starting position of the unit shown in FIG. 4 in the furnace 12 of the melting vessel 1 at least half the capacity of the treatment vessel 2 can be retained.
- a first heating device is assigned to the melting vessel 1 for the supply of the thermal energy required for melting the metallic insert material.
- Induction coils, burners, gas purging stones, under bath nozzles, inflation and post-combustion nozzles or other known heating devices for heating and melting the feed material can include.
- side wall burners 30 are indicated as representative of the first heating device, and in FIGS. 4 and 6, a passage opening 31 in the vessel lid 11 for inserting an arc electrode 40.
- a second heating device is assigned to the treatment vessel.
- the second heating device can comprise the same energy sources as the first heating device.
- the heating devices known from ladle metallurgy are preferred.
- Arc electrodes 40 are represented in FIG. Gases and also pulverized solids can be introduced into the melt for their treatment via floor purging stones (not shown) or nozzles 32.
- a lifting and swiveling device 33 for three electrodes 40 is arranged in addition to the structural unit consisting of melting vessel 1 and treatment vessel 2 in such a way that the electrodes can optionally be inserted into the melting vessel 1 and into the treatment vessel 2 and there as the first or second heating device can be used.
- the lifting and pivoting device 33 as can be seen in particular in FIG. 3, is fastened on the tilting frame 3 of the unit, so that the electrodes do not have to be removed from the relevant vessel when the unit is tilted.
- the melting vessel 1 has a charge preheater 34.
- This is designed as a shaft and fastened in the holding structure 35 for the cover 11.
- the basic structure of such a melting vessel with an integrated charge preheater is described in WO 90/10 086. Accordingly, a segment of the lid is replaced by a shaft through which the metallic insert material can be charged into the melting vessel. The lower opening of the shaft is simultaneously the inlet opening 10 of the melting vessel present in cover 11.
- the charge material preheater 34 is closed at the top by a cover 36 which can be moved to the side. The hot furnace gases passed through the charge preheater are drawn off via an upper outlet opening 38.
- the charge preheater has blocking members 37 in the form of fingers lying next to one another at a distance, which fingers can be pivoted downward from the closed position shown in solid lines in FIG. 6 into a release position shown in dashed lines, in which they pass through release through the shaft.
- the feed material is retained in the charge preheater and can be flowed through by the hot furnace gases, which enter the charge item column from below through the spaces between the blocking members 37 and, after their heat has been released, are drawn off via the outlet opening 38 .
- the finished metal melt is tapped through the tap opening 18 and then the tap opening is closed again.
- the molten metal is transferred from the furnace 12 through the connecting channel 26 into the treatment vessel and, when or after tipping back into the starting position, the preheated feed material into the melting vessel by pivoting the locking members 37 into the release position yaws.
- the locking members 37 are pivoted back into their closed position, and cold feed material is charged through the upper opening released by the cover 36 moved to the side and the opening is immediately closed again.
- the electrodes 40 are moved into the treatment vessel 2 and the treatment process is initiated, the hot furnace exhaust gases via the connection channel 26 into the Flow the melting vessel 1, give off sensible heat to the feed material and then pass it through the charge column in the charge preheater 34 for further heat utilization. Simultaneously with the supply of heat through the second heating device into the treatment vessel - part of the heat can be supplied by blowing oxygen in through bath tub nozzles, sink stones and lances - the heat is supplied through the first heating device, i.e. in the present case through the burners 30, into the Melting vessel to melt the material in this vessel. The resulting hot furnace gases are also passed through the feed material retained in the charge preheater.
- the electrodes 40 into the treatment vessel 2 After sufficient heat has been supplied by the electrodes 40 into the treatment vessel 2, the electrodes are pulled out of the treatment vessel by the electrode lifting and swiveling device, swiveled to the side and introduced into the melting vessel 1 in order to support the burner output and to accelerate the melting process.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4445783A DE4445783A1 (de) | 1994-12-21 | 1994-12-21 | Kippbares metallurgisches Aggregat |
DE4445783 | 1994-12-21 | ||
PCT/EP1995/005072 WO1996019592A1 (de) | 1994-12-21 | 1995-12-21 | Kippbares metallurgisches aggregat bestehend aus mehreren gefässen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0799323A1 true EP0799323A1 (de) | 1997-10-08 |
EP0799323B1 EP0799323B1 (de) | 1999-09-15 |
Family
ID=6536576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95942719A Expired - Lifetime EP0799323B1 (de) | 1994-12-21 | 1995-12-21 | Kippbares metallurgisches aggregat bestehend aus mehreren gefässen |
Country Status (13)
Country | Link |
---|---|
US (1) | US5882578A (de) |
EP (1) | EP0799323B1 (de) |
JP (1) | JPH10510880A (de) |
CN (1) | CN1043245C (de) |
AT (1) | ATE184656T1 (de) |
AU (1) | AU4388796A (de) |
BR (1) | BR9510171A (de) |
CA (1) | CA2208229A1 (de) |
DE (2) | DE4445783A1 (de) |
DK (1) | DK0799323T3 (de) |
ES (1) | ES2135787T3 (de) |
GR (1) | GR3031565T3 (de) |
WO (1) | WO1996019592A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19634348A1 (de) | 1996-08-23 | 1998-02-26 | Arcmet Tech Gmbh | Einschmelzaggregat mit einem Lichtbogenofen |
IT1289021B1 (it) * | 1996-11-13 | 1998-09-25 | Danieli Off Mecc | Forno elettrico ad arco e relativo procedimento di fusione continua |
LU90141B1 (de) * | 1997-09-30 | 1999-03-31 | Wurth Paul Sa | Chargiergutvorwaermer |
DE10355549A1 (de) * | 2003-11-27 | 2005-06-23 | Intracon Gmbh | Chargiergutvorwärmer |
CN103898337B (zh) * | 2012-12-31 | 2016-08-24 | 保定安保能冶金设备有限公司 | 再生铝自动熔化铝铁分离工艺 |
CN103352123B (zh) * | 2013-07-25 | 2015-05-20 | 西安电炉研究所有限公司 | 矿热精炼电炉热装生产设备及其生产工艺 |
DE102014115671A1 (de) * | 2014-10-28 | 2016-05-12 | Gerhard Fuchs | Schmelzvorrichtung und schmelzverfahren |
CN105202907B (zh) * | 2015-10-30 | 2017-09-29 | 中冶赛迪工程技术股份有限公司 | 废钢预热型电弧炉及改善侧壁加料电弧炉加热冷区的方法 |
CN110257588B (zh) * | 2019-07-04 | 2023-04-14 | 中冶京诚工程技术有限公司 | 一种液态金属冶炼系统及冶炼方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US682512A (en) * | 1900-07-16 | 1901-09-10 | Wellman Seaver Engineering Company | Open-hearth steel-furnace. |
FR1482929A (fr) * | 1966-04-01 | 1967-06-02 | Siderurgie Fse Inst Rech | Procédé d'élaboration d'un métal au four électrique |
DE2504911C3 (de) * | 1975-02-06 | 1978-12-14 | Kloeckner-Werke Ag, 4100 Duisburg | Vorrichtung zum Einschmelzen von Schrott, Eisenschwamm o.dgl |
DE3322485A1 (de) * | 1982-06-24 | 1983-12-29 | British Steel Corp., London | Vorrichtung und verfahren zur metallverarbeitung bzw. -veredelung |
DE3412810A1 (de) * | 1984-04-05 | 1985-10-17 | Fried. Krupp Gmbh, 4300 Essen | Einrichtung zum abgiessen eines herdofens |
US4552343A (en) * | 1985-05-13 | 1985-11-12 | Insul Company, Inc. | Combination electric furnace and slag retaining pouring spout |
AT384669B (de) * | 1986-03-17 | 1987-12-28 | Voest Alpine Ag | Anlage zur herstellung von stahl aus schrott |
WO1990010086A2 (de) * | 1989-03-02 | 1990-09-07 | Fuchs Technology Ag | Einschmelzaggregat mit schachtförmigem chargiergutvorwärmer |
JPH02290912A (ja) * | 1989-04-28 | 1990-11-30 | Daido Steel Co Ltd | 溶解装置及び溶解方法 |
US5471495A (en) * | 1991-11-18 | 1995-11-28 | Voest-Alpine Industrieanlagenbeau Gmbh | Electric arc furnace arrangement for producing steel |
-
1994
- 1994-12-21 DE DE4445783A patent/DE4445783A1/de not_active Withdrawn
-
1995
- 1995-12-21 JP JP8519520A patent/JPH10510880A/ja active Pending
- 1995-12-21 DE DE59506858T patent/DE59506858D1/de not_active Expired - Fee Related
- 1995-12-21 CA CA002208229A patent/CA2208229A1/en not_active Abandoned
- 1995-12-21 CN CN95197022A patent/CN1043245C/zh not_active Expired - Fee Related
- 1995-12-21 BR BR9510171A patent/BR9510171A/pt not_active IP Right Cessation
- 1995-12-21 AU AU43887/96A patent/AU4388796A/en not_active Abandoned
- 1995-12-21 US US08/849,484 patent/US5882578A/en not_active Expired - Fee Related
- 1995-12-21 AT AT95942719T patent/ATE184656T1/de not_active IP Right Cessation
- 1995-12-21 ES ES95942719T patent/ES2135787T3/es not_active Expired - Lifetime
- 1995-12-21 EP EP95942719A patent/EP0799323B1/de not_active Expired - Lifetime
- 1995-12-21 WO PCT/EP1995/005072 patent/WO1996019592A1/de not_active Application Discontinuation
- 1995-12-21 DK DK95942719T patent/DK0799323T3/da active
-
1999
- 1999-10-18 GR GR990402659T patent/GR3031565T3/el unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9619592A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4445783A1 (de) | 1996-06-27 |
JPH10510880A (ja) | 1998-10-20 |
DE59506858D1 (de) | 1999-10-21 |
EP0799323B1 (de) | 1999-09-15 |
CA2208229A1 (en) | 1996-06-27 |
CN1171136A (zh) | 1998-01-21 |
GR3031565T3 (en) | 2000-01-31 |
DK0799323T3 (da) | 1999-12-20 |
US5882578A (en) | 1999-03-16 |
ATE184656T1 (de) | 1999-10-15 |
BR9510171A (pt) | 1997-10-14 |
AU4388796A (en) | 1996-07-10 |
CN1043245C (zh) | 1999-05-05 |
WO1996019592A1 (de) | 1996-06-27 |
ES2135787T3 (es) | 1999-11-01 |
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