EP2437017A1 - Procédé de fusion de métaux nonferreux dans un fourneau à cuve verticale par gaz et installation de fourneau à cuve verticale destinée à l'exécution du procédé - Google Patents

Procédé de fusion de métaux nonferreux dans un fourneau à cuve verticale par gaz et installation de fourneau à cuve verticale destinée à l'exécution du procédé Download PDF

Info

Publication number
EP2437017A1
EP2437017A1 EP20110007882 EP11007882A EP2437017A1 EP 2437017 A1 EP2437017 A1 EP 2437017A1 EP 20110007882 EP20110007882 EP 20110007882 EP 11007882 A EP11007882 A EP 11007882A EP 2437017 A1 EP2437017 A1 EP 2437017A1
Authority
EP
European Patent Office
Prior art keywords
furnace
burner
melting
zone
shaft
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
EP20110007882
Other languages
German (de)
English (en)
Other versions
EP2437017B1 (fr
Inventor
Michael Dipl.-Ing. Albrecht
Hans-Jürgen Dipl.-Ing. Schütt
Joachim Dipl.-Ing. Dauterstedt
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.)
MKM Mansfelder Kupfer und Messing GmbH
Original Assignee
MKM Mansfelder Kupfer und Messing GmbH
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 MKM Mansfelder Kupfer und Messing GmbH filed Critical MKM Mansfelder Kupfer und Messing GmbH
Publication of EP2437017A1 publication Critical patent/EP2437017A1/fr
Application granted granted Critical
Publication of EP2437017B1 publication Critical patent/EP2437017B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/02—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey
    • F27B1/025—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey with fore-hearth
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0028—Smelting or converting
    • C22B15/003—Bath smelting or converting
    • C22B15/0032—Bath smelting or converting in shaft furnaces, e.g. blast 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B1/28—Arrangements of monitoring devices, of indicators, of alarm devices
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners

Definitions

  • the invention relates to a method for melting non-ferrous metals, in particular copper cathodes and scrap copper, in a gas-fired shaft furnace, wherein the non-ferrous metal to be melted fed in the head of the shaft furnace, due to gravity drops down and is melted by means of several gas-powered burner.
  • the invention further relates to a suitable shaft furnace system for carrying out the method.
  • a still today in practice used shaft furnace is from the US 3 199 977 A and the US 3,366,465 A
  • the furnace consists of a vertically arranged furnace shaft with a circular cross-section. At the lower end there is a flat floor inclined towards the tapping opening (gradient approx. 16%). At the upper end sits an exhaust hood on the furnace opening through which the kiln exhaust gases are discharged.
  • the exhaust hood has a large opening through which copper cathodes and copper scrap are fed to the shaft furnace.
  • the Schsch cross-section narrows conically continuously to about 80% of the cross-sectional area in the upper region.
  • the furnace shell surface are located in an annular arrangement eight or nine natural gas-air burners, which are at a height. Depending on the size of the furnace, three or four such burner rings are arranged at different heights (viewed from the bottom) at a distance from one another. The last burner ring is in a case, e.g. arranged at a height which is 36% of the total height.
  • the penultimate burner ring is mounted above the conical taper in the cylindrical part of the furnace shaft.
  • each burner is supplied with a natural gas-air mixture, which is continuously analyzed.
  • the analysis result is a CO value, which is compared to a setpoint and then used to alter the ratio of natural gas to air so that the burner flame is set reducing.
  • a shaft melting furnace ( DE 3 603 251 A1 ) for melting aluminum or aluminum alloys, which consists of a cylindrical shaft and a furnace hearth, which is formed concave and steeply sloping, and an outlet trough. Stove and outlet trough are inclined downwards against the tapping device.
  • the burners for heating the melt are arranged in the hearth and in the shaft at different heights.
  • the outlet openings of the burners are chosen so that their axes are inclined downwards to prevent metal droplets can reach the opposite wall or the burner opening.
  • the outlet trough must be kept hot with a separate burner. The hot metal should thereby flow as quickly as possible towards the outlet.
  • This furnace is therefore unsuitable for melting copper.
  • the invention has for its object to provide a method for melting of non-ferrous metals in a gas-fired shaft furnace, which is characterized in comparison to the known methods by a higher efficiency and leads to lower environmental impact. Furthermore, a suitable for carrying out the method shaft furnace system is to be created.
  • the metal to be melted first enters a vertical cylindrical preheating zone.
  • a first arrangement of burners which are installed at the phase boundary between the preheating zone and the melting zone in the shaft furnace annularly at equal radial distances from each other, as well as by the output by rising, hot exhaust heat energy, the flow material is heated.
  • the heating is controlled so that the precursor material is uniformly heated, except for a temperature range near the melting temperature, which is achieved in the lower exit region of the preheating zone, in the axial direction of the melting furnace there is a temperature gradient.
  • the regulation of the heat supply in the shaft furnace is tuned so that in the preheating zone no melting takes place.
  • the heat input required for this purpose takes place via a second burner arrangement, wherein the burners are arranged distributed in a plane uniformly over the circumference, preferably in a radial offset from the burners of the first arrangement.
  • the melting zone differs significantly in its furnace geometry from the preheating zone. At the phase boundary between the preheating and melting zone, a shaft cross-sectional widening takes place with subsequent continuous cross-sectional constriction of the furnace interior in the direction of the discharge opening.
  • the geometry of the furnace interior of the molten zone corresponds to the outer shape of an obelisk.
  • This special design of the furnace interior in conjunction with the targeted heat supply allows a targeted melting in the direction of liquid discharge.
  • the liquid metal flows off as a channel in the direction of the discharge opening.
  • heat energy is also supplied via a third burner arrangement, which may consist of a burner.
  • a third burner arrangement which may consist of a burner. This measure ensures a safe continuous discharge of the liquid metal from the discharge and a given liquid metal overheating.
  • the temperature of the exhaust gases is measured at the furnace head and controlled by controlling the furnace performance (melting power) and / or by changing the thermal performance of the burner so that it becomes smaller, at most 600 ° C.
  • the exhaust gas temperatures at the top of the shaft furnace are above 1000 ° C.
  • the measures according to the invention for reducing the exhaust gas temperature are of decisive importance for economic operation.
  • the special furnace geometry has an advantageous effect on lowering the exhaust gas temperature without adversely affecting the melting performance.
  • the furnace geometry ensures a uniform, constant flow of the exhaust gas in the furnace shaft.
  • the proposed procedure makes it possible to achieve firing efficiency ⁇ f of about 0.70.
  • the consumption of fuel or natural gas to melt one tonne of copper scrap can thus be reduced by approx. 20 to 25% depending on the selected melting performance.
  • the supply of heat energy in the preheating and melting zone can be controlled separately (separate heating zones) from each other.
  • the firing capacity can be tailored to the quality and condition of the flow material.
  • the exhaust gas temperature measured at the shaft furnace head is used as a reference for controlling and regulating the process parameters (the shaft furnace melting operation) by linking the combustion control per heating zone, the control of the feed level and the control of the mechanical exhaust gas discharge.
  • the temperature of the exhaust gases used for preheating in the exhaust pipe is measured and set to a value of less than or equal to 600 ° C.
  • the furnace chamber pressure in the head area of the shaft furnace can be adjusted to a value ⁇ zero level by changing the capacity for exhaust gas extraction.
  • the kiln exhaust gases are sucked off and subjected to exhaust aftertreatment. According to the mode of operation, the waste heat of the resulting exhaust gases can be used primarily or secondarily.
  • the height or length of the preheating zone is about 4D to 6D, where D is the inside diameter of the furnace shaft.
  • the height of the melting zone, based on the center axis of the shaft furnace is in the range of about 1 D to 1, SD.
  • the length of the furnace bottom from the center shaft shaft furnace is about 1.07D to 1.2D.
  • the arranged in the wall of the preheating zone burners are arranged inclined in the axial direction at an angle of about 8 to 15 ° downwards.
  • the burners arranged in the wall of the preheating zone and the melting zone are radially offset relative to one another in their planes as a first arrangement and a second arrangement.
  • the feed opening can be closed and provided at the top of the shaft furnace is an under suction exhaust pipe with a temperature measuring device.
  • Fig. 1 Schachtschmelzofenstrom shown consists of a gas-fired shaft furnace 1 and a shaft furnace upper part 2 with a feed lock 3 and a shaft 4 for supplying einmelzendem material, such as copper cathodes and copper scrap, and an exhaust pipe or exhaust duct 5.
  • the exhaust pipe 5 In the exhaust pipe 5 are a Notesse 6 and an induced draft 7 integrated.
  • a temperature sensor 8 is installed in the wall of the exhaust pipe, with which the exhaust gas temperature is measured. The measured values are transmitted to a computer-aided control unit, not further shown, which will be discussed briefly below.
  • For loading lock 3 belongs at least one lock gate 9 with slide 9a. About the lock gate 9, the opening of the feed shaft 4 is closed.
  • the shaft furnace 1 consists of a vertically arranged, cylindrical furnace shaft 10 a, as preheating zone 10, to which a section 11 a adjoins, which forms the melting zone 11.
  • the interior of the preheating zone 10 is cylindrical.
  • the interior of the melting zone 11 has a widening enlarging steadily downwards, in the direction of the oven floor 18, e.g. has the shape of an obelisk.
  • the furnace interior tapers in the liquid metal zone in the direction of liquid metal discharge 19,
  • the height of a shaft furnace 1 is approximately 5 to 7.5 times the inside diameter D.
  • the height or length of the preheating zone is 4D to 6D, where D is the inside diameter of the furnace shaft, and e.g. 1.5 to 2 m.
  • the furnace volume of the preheating zone is about 80 to 90% of the total furnace volume.
  • the preheating zone 10 is designed exclusively as a cylindrical space with a constant inner diameter D.
  • a first annular burner assembly 12 consisting of nine gas-fired burners 13 arranged at equal radial distances (4D ° to each other) in a plane as in Figs FIGS. 1 to 3 you can see.
  • the individual burners 13 are arranged so that the burner axes point slightly downwards in the direction of the oven floor 18.
  • the burner 13 are not shown in detail, but only the corresponding inserts for receiving the burner indicated.
  • the melting zone 11 begins immediately after the burner assembly 12 and is bounded below by a flat furnace sole 18 which extends slightly inclined in the flow direction. At the front, lowest end of the furnace sole 18 is the discharge opening 19 for the liquid metal.
  • the rear wall 16 of the melting zone is semicircular, as in particular in Figs Figures 2 and 4 you can see.
  • the front wall 14 of the shaft furnace 1 merges into the upper wall section 20, which runs approximately parallel to the furnace sole 18.
  • the adjoining the rear wall 16 at the bottom side walls 17 extend conically tapered in the direction of discharge opening 19.
  • the furnace sole 18 has, for example, a teardrop-shaped cross section, as in Fig. 4 to see.
  • a second burner arrangement 21 is provided, consisting of ten burners 22.
  • the burners 22 are arranged at equal distances from one another in a plane (FIG. FIGS. 1 to 3 ).
  • the arranged in schreisförrnigen section 16 burner 22 are arranged at a radial distance of 36 °.
  • the burners 22 are offset by half the radial distance ( Fig. 3 ). In the accompanying drawing only the burner inserts are to be seen,
  • a third burner assembly 23 is still provided, which consists for example only of a burner 24.
  • this burner 24 19 so much heat energy is supplied to the area in the immediate vicinity of the discharge 19 in continuous operation state that the liquid metal can flow continuously.
  • This burner 24 is inclined in the direction of the central axis of the shaft furnace 1 ( Fig. 1 ) and arranged so that a possible inlet of liquid metal is largely excluded.
  • the shaft furnace 1 shown is equipped with a total of twenty burners. Due to the staggered arrangement of the burners 13 and 22 of the first and second burner assemblies 12 and 21, a continuous cross-sectional heat load is achieved in the operating state, which has a favorable effect on the melting process.
  • the burners of the shaft furnace 1 are operated with natural gas neck fuel gas.
  • the parameters of this fuel gas are well known.
  • To maintain a low-oxygen smelting firing takes place via the burner 12, 21 and 24 with a gas-air ratio control.
  • a combustion air preheating can take place.
  • the material to be melted (copper cathodes, copper scrap) is lowered from a feed lock 3 into the cylindrical furnace shaft 4 in accordance with the respectively required melting rate.
  • the feed material supplied is heated by the specific firing capacity of the annularly arranged burner 13 of the first burner assembly 12 and the rising hot exhaust gases to temperatures near melting point.
  • the temperature is lowered.
  • the furnace internal space pressure is regulated. The regulation is to be made so that the zero pressure level is in the region of the interface between the preheating zone 10 and the melting zone 11, in particular in order to avoid false air aspiration via the liquid metal outlet. Procedurally, it is thus ensured that the exhaust gas flows off evenly and is not subjected to any major temperature fluctuations.
  • the exhaust gas temperature can be used as a guide variable or essential control parameters for the entire process control of the melting furnace.
  • the exhaust gas temperature is continuously measured by means of temperature sensor 8 at the upper end of the preheating zone 10 and adjusted by quantitative change regarding the supply of feed material (melting power) and / or change the firing capacity, in particular the burner 13 at the phase boundary between preheating zone 10 and the melting zone 11 in that the actual exhaust gas temperature in continuous operation is as low as possible and at most 600 ° C.
  • the advantage of the comparatively low exhaust gas temperature is a considerable cost-reducing after-treatment (purification) of the exhaust gas.
  • the resulting exhaust gas can still be used economically as secondary energy.
  • the supplied preheated feedstock is melted, the heat energy supply required for this purpose via the two gas burner assemblies 12 and 21.
  • the proposed furnace geometry, in particular the shaft cross-sectional enlargement 15 with subsequent continuous tapering through the side walls 17, ensures a continuous melting over the cross section and a uniform and almost constant temperature distribution in the liquid metal.
  • the molten to liquid metal lead material collects as channels on the slightly inclined furnace bottom 18 and flows at the end of the furnace bottom via the discharge opening 19 from.
  • the geometric design of the melting zone 11 in conjunction with the arrangement of the burner, in particular the burner 24, allow a continuous and constant liquid metal discharge.
  • the current melting performance is determined and displayed based on the currently measured exhaust gas temperature. Also, the current consumption of natural gas is displayed separately for each burner as well as the total consumption value. If the measured exhaust gas temperature is above 600 ° C, first calculates whether a correction can be made by adjusting the filling level in the shaft. If this is not possible, the firing capacity must be adjusted.
  • Both the preheating zone and the melting zone can be controlled independently of each other technologically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP11007882.1A 2010-09-29 2011-09-28 Procédé de fusion de métaux nonferreux dans un fourneau à cuve verticale par gaz et installation de fourneau à cuve verticale destinée à l'exécution du procédé Active EP2437017B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010047056.2A DE102010047056B4 (de) 2010-09-29 2010-09-29 Verfahren zum Einschmelzen von NE-Metallen in einem gasbefeuerten Schachtofen und Schachtofenanlage zur Durchführung des Verfahrens

Publications (2)

Publication Number Publication Date
EP2437017A1 true EP2437017A1 (fr) 2012-04-04
EP2437017B1 EP2437017B1 (fr) 2018-05-09

Family

ID=44719096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11007882.1A Active EP2437017B1 (fr) 2010-09-29 2011-09-28 Procédé de fusion de métaux nonferreux dans un fourneau à cuve verticale par gaz et installation de fourneau à cuve verticale destinée à l'exécution du procédé

Country Status (2)

Country Link
EP (1) EP2437017B1 (fr)
DE (1) DE102010047056B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114645136A (zh) * 2022-03-16 2022-06-21 杭州富通集团有限公司 铜杆的加工工艺

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3199977A (en) 1962-06-22 1965-08-10 American Smelting Refining Method and apparatus for melting copper
US3366465A (en) 1962-06-22 1968-01-30 American Smelting Refining Cast copper wire bar
US3715203A (en) * 1969-12-24 1973-02-06 Metallurgie Hoboken Melting of metals
CA955399A (en) * 1971-06-10 1974-10-01 International Nickel Company Of Canada Vertical melting furnace
CA986300A (en) * 1973-02-14 1976-03-30 Ralph A. Vogel Vertical melting surface
DE3603251A1 (de) 1985-02-04 1986-08-07 Southwire Co., Carrollton, Ga. Verfahren sowie vertikaler schachtofen zum schmelzen von aluminium und aluminiumlegierungen
US4844426A (en) * 1985-02-04 1989-07-04 Southwire Company Vertical shaft furnace for melting aluminum
US5397109A (en) * 1993-10-29 1995-03-14 Southwire Company Reduced emissions metal melting furnace
DE69230152T2 (de) 1991-04-25 2000-04-06 Asarco Inc. Verfahren zur regelung des brennstoff/luft-verhältnisses eines brenners
JP2001027482A (ja) * 1999-07-12 2001-01-30 Furukawa Electric Co Ltd:The 銅溶解炉
JP2001141367A (ja) * 1999-11-18 2001-05-25 Daido Steel Co Ltd 銅溶解用シャフト炉

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2284130A1 (fr) * 2009-07-07 2011-02-16 Linde Aktiengesellschaft Procédé de fabrication de laine minérale

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3199977A (en) 1962-06-22 1965-08-10 American Smelting Refining Method and apparatus for melting copper
US3366465A (en) 1962-06-22 1968-01-30 American Smelting Refining Cast copper wire bar
US3715203A (en) * 1969-12-24 1973-02-06 Metallurgie Hoboken Melting of metals
CA955399A (en) * 1971-06-10 1974-10-01 International Nickel Company Of Canada Vertical melting furnace
CA986300A (en) * 1973-02-14 1976-03-30 Ralph A. Vogel Vertical melting surface
DE3603251A1 (de) 1985-02-04 1986-08-07 Southwire Co., Carrollton, Ga. Verfahren sowie vertikaler schachtofen zum schmelzen von aluminium und aluminiumlegierungen
US4844426A (en) * 1985-02-04 1989-07-04 Southwire Company Vertical shaft furnace for melting aluminum
DE69230152T2 (de) 1991-04-25 2000-04-06 Asarco Inc. Verfahren zur regelung des brennstoff/luft-verhältnisses eines brenners
US5397109A (en) * 1993-10-29 1995-03-14 Southwire Company Reduced emissions metal melting furnace
JP2001027482A (ja) * 1999-07-12 2001-01-30 Furukawa Electric Co Ltd:The 銅溶解炉
JP2001141367A (ja) * 1999-11-18 2001-05-25 Daido Steel Co Ltd 銅溶解用シャフト炉

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KNIGHT S J ET AL: "DEVELOPMENT OF GAS-FIRED TOWER FURNACES FOR MELTING ALUMINIUM", FOUNDRY TRADE JOURNAL, INSTITUTE OF CAST METALS ENGINEERS, WEST BROMWICH, GB, vol. 118, no. 2530, 3 June 1965 (1965-06-03), pages 653 - 661, XP001231503, ISSN: 0015-9042 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114645136A (zh) * 2022-03-16 2022-06-21 杭州富通集团有限公司 铜杆的加工工艺
CN114645136B (zh) * 2022-03-16 2024-08-09 杭州富通集团有限公司 铜杆的加工工艺

Also Published As

Publication number Publication date
EP2437017B1 (fr) 2018-05-09
DE102010047056A1 (de) 2012-03-29
DE102010047056B4 (de) 2021-07-29

Similar Documents

Publication Publication Date Title
DE69526422T2 (de) Schmelzverfahren für Lichtbogenofen mit verschiedenen Energiequellen und Lichtbogen dafür
DE60305321T2 (de) Injektorbrenner für metallurgische schmelzgefässe
DE2062144C3 (de) Verfahren und Vertikalofen zum Schmelzen und Raffinieren von Roh- oder Blisterkupfer
EP2166284B1 (fr) Four à tambour rotatif et procédé destiné au fonctionnement
EP2032726B1 (fr) Procédé et four pour fondre des riblons d'acier
EP2284130A1 (fr) Procédé de fabrication de laine minérale
DE102011014996A1 (de) Luft-Sauerstoff-Mischbrenner im Wanneofen
EP1481101B1 (fr) Procede et dispositif de production d'acier en continu faisant appel a des matieres de charge metalliques
DE1957109B2 (de) Verfahren zum schmelzen von aluminium in einem flammofen
EP2437017B1 (fr) Procédé de fusion de métaux nonferreux dans un fourneau à cuve verticale par gaz et installation de fourneau à cuve verticale destinée à l'exécution du procédé
DE2729188A1 (de) Hochtemperatur-reaktor und verfahren zu seinem betrieb
DE1924812C3 (de) Brennerlanze für einen metallurgischen Ofen und Verfahren zum Betreiben eines solchen Ofens mit dieser Brennerlanze
DE102013016192B3 (de) Vorrichtung und Verfahren zum Elektroschlacke-Umschmelzen
EP0572609A1 (fr) Procede et dispositif de fonte de ferraille.
EP2213971B1 (fr) Procédé de fusion de matière utilisée dans un four à coupole
EP3228403B1 (fr) Procédé et dispositif destinés à conserver au chaud des métaux liquides
DE2951826C2 (de) Metallurgisches Schmelz- und Frischaggregat
DE3106859C2 (de) Kupolofen
EP1835039B1 (fr) Dispositif de fusion, avec un injecteur, une lance ou un brûleur
DE2926345A1 (de) Verfahren zum erhitzen und schmelzen einer materialfuellung in einem schmelzofen und brenner fuer die verbrennung fluessigen brennstoffs
DE2932938A1 (de) Metallurgisches schmelzaggregat, insbesondere lichtbogenofen
DE665124C (de) Schachtofen zur Reduktion von Erzen und zur Ausfuehrung anderer Reaktionen
DE2327072B1 (fr)
DE678263C (de) Verfahren zur Durchfuehrung von metallurgischen Reaktionen in einem Schachtofen
DE2255945A1 (de) Siemens-martin-ofen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20120914

17Q First examination report despatched

Effective date: 20150515

19U Interruption of proceedings before grant

Effective date: 20151016

19W Proceedings resumed before grant after interruption of proceedings

Effective date: 20160502

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20171206

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 997959

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180515

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502011014154

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20180509

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180809

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180809

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180810

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502011014154

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20190212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20180928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20180930

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502011014154

Country of ref document: DE

Representative=s name: BOCKERMANN KSOLL GRIEPENSTROH OSTERHOFF, DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180930

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180930

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502011014154

Country of ref document: DE

Representative=s name: BOCKERMANN KSOLL GRIEPENSTROH OSTERHOFF, DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 502011014154

Country of ref document: DE

Owner name: KME MANSFELD GMBH, DE

Free format text: FORMER OWNER: MKM MANSFELDER KUPFER UND MESSING GMBH, 06333 HETTSTEDT, DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180928

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 997959

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180928

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20110928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180509

Ref country code: MK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180509

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180909

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20250926

Year of fee payment: 15