EP3110981A1 - Verfahren und anlage zur thermischen behandlung von langgestrecktem, flachem metallischen gut, insbesondere aluminium-walzbarren, in einem ringherdofen - Google Patents
Verfahren und anlage zur thermischen behandlung von langgestrecktem, flachem metallischen gut, insbesondere aluminium-walzbarren, in einem ringherdofenInfo
- Publication number
- EP3110981A1 EP3110981A1 EP15711059.4A EP15711059A EP3110981A1 EP 3110981 A1 EP3110981 A1 EP 3110981A1 EP 15711059 A EP15711059 A EP 15711059A EP 3110981 A1 EP3110981 A1 EP 3110981A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- furnace
- aluminum ingots
- ring hearth
- ring
- hearth
- 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
-
- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/16—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0037—Rotary furnaces with vertical axis; Furnaces with rotating floor
-
- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
- F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
-
- 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
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/04—Circulating atmospheres by mechanical means
Definitions
- the invention relates to a method for the thermal treatment of
- Furnace control is connected to a higher-level process control system, using as a furnace, a ring hearth furnace is used between a
- heat-insulated outer casing and a heat-insulated inner casing has a sealed against the housing, rotary ring hearth bottom, said sealed with a heat-insulated ceiling ring hearth furnace is formed with at least one closable loading and discharge opening and is heated with gas or electric. Furthermore, the invention relates to a system comprising a ring hearth furnace for carrying out the method.
- a ring hearth furnace In a ring hearth furnace is a special form of a
- Rotary hearth furnace both types of furnace in the industry for a long time prior art and in the special form as a ring hearth in the steel industry, there especially in the forging industry for heating forging blocks, but also in the heat treatment, especially for carburizing example of
- Gear parts are used.
- the pusher furnace comprises the heat-insulating bricked housing with a seen in the direction of passage of the goods front end wall and a rear end wall, two connecting the two end walls together
- the transport device is designed such that it receives the elongated, flat Good transversely to the direction of passage.
- the material to be treated is placed on sliding shoes, which can be moved to arranged in the furnace chamber rails, usually by means of a hydraulic impact device.
- Discharge opening or openings for loading and unloading must release an extremely large passage, even if the aluminum ingots are pushed standing on its narrow, long end face through the oven.
- the lot sizes which are equipped with low-temperature ovens, is usually between 30 t and 300 t, wherein the aluminum ingots standing upright on one of their narrow end faces in corresponding receptacles at the bottom of the furnace or flat lying on each other, separated by spacers, in the Tiefofen be charged.
- Aluminum ingot with high air speed In the case of the aluminum ingots, which are stationary from the time of loading to the time of removal, uneven heating or partially excessive heating, so-called hot spots, can occur.
- the aluminum rolling ingots are loaded and unloaded with the help of a block tongs movable over the deep furnace or a hall crane. If a heated aluminum ingot removed from the deep furnace, which is at least over a partial length and over the entire width of the furnace chamber extending furnace cover lifted or driven up, with a large part of the hot Bleglasungs Kunststoff exiting the furnace, which inevitably leads to a reduction of the preset oven temperature leads.
- the invention has for its object to provide a method and a system for the thermal treatment of aluminum ingots, with which the advantages of a proven in the steel industry ring hearth furnace with the proven in the aluminum industry with a simplified structure Combine convection heating to a significantly reduced
- Rolling surfaces are flowed around by the air. This results in an all-round flow around the aluminum ingots, which can still be favored by the fact that the aluminum ingots are placed on a resting on the ring hearth bottom, continuous storage rack in honeycomb form of heat-resistant cast steel.
- the ring hearth furnace can be inventively for
- Heating the aluminum ingots to rolling temperature and in contrast increased temperature also operate to homogenize the aluminum ingots, the aluminum ingots after expiration of the
- Residual heat of the aluminum ingots are heated again to rolling temperature.
- thermocouples and reference junction are via thermocouples and reference junction directly in the
- PLC Programmable Logic Controller
- Temperature control takes place.
- For monitoring and control of the ring hearth furnace is formed with independent control zones and zone-independent control loops.
- the setpoints and parameters required for an annealing program are loaded from the existing higher-level process control system into the corresponding furnace control.
- heated Furnace space aluminum ingots with a total weight of, for example, 430 1, 530 1 or 620 t are introduced at maximum load.
- the heating process starts after the glow plug to be used has been called from the PLC.
- the air temperature is set to an excess temperature (max 650 ° C) and automatically maintained at this excess temperature.
- Ring hearth bottom advantageously continuously rotated slowly to avoid overheating on the narrow longitudinal sides of the aluminum ingots and to even out the temperature, which also contributes significantly to the rotation of the ring hearth bottom.
- the ring hearth furnace allows for always constant loading and unloading a load with the aluminum ingots from above, z. B. by means of a hall crane, or from the side, z. B. by means of a handling robot.
- different loading strategies can be carried out, namely by distributing the aluminum ingots circumferentially with their wide rolling surfaces spaced one-lane or two-lane with then also spaced apart narrow longitudinal sides, ie on an outer circular path and a concentric inner circular path, can be placed in the hearth interior, the two-lane loading can be done with in-line or offset aluminum ingots.
- the two-lane loading with offset aluminum ingots and no fixed positions in relation to the ring hearth furnace allows a maximum batch weight, z. B. 620 t, compared to a two-lane loading of series shut down aluminum ingots with a batch weight of about 440 t, the same
- a further measure according to the invention provides that the actual temperature of the aluminum rolling bars per zone, which is predetermined by each of the ceiling-side circulation fans, is periodically checked, for which purpose the rotational movement of the ring hearth bottom is briefly stopped.
- the measured values are processed in the PLC or the higher-level process control system and loaded into the furnace control.
- Inner walls of the outer and inner housing extend. The to
- Inner housing burner ring are arranged forming, with their burner tubes adjacent to the inner walls of the outer and the inner housing extending immersed in the upper Ringherdinninnere.
- the aluminum rolling ingots parked in the upright position with their short end faces on the ring hearth bottom are thus blown from their two narrow longitudinal sides with the air which accelerates out of the slot nozzles.
- the over the circulating fans sucked in from the bottom upwards air is passed after its heating by the two burner rings on the inner walls of the outer and inner housing in the local pressure channels.
- rotatably mounted ring hearth bottom is mounted on fixed rollers and has a toothed ring for driving, with which a pinion acted upon by a frequency-controlled electric motor meshes. It is thus only a working according to the operating principle drive block drive unit needed to stop the rotational movement or the positionally accurate clocking of the driven
- the rollers on which the ring hearth bottom expires offer a long service life due to central lubrication of their rolling bearings.
- Measuring lance is provided by the inner or outer housing in the ring hearth inside immersing Andschreib thermocouple.
- the pressing thermocouples can be actuated electromechanically and serve on the one hand to measure the air temperature and on the other hand to measure the temperature of the aluminum ingots.
- the at least one loading and unloading opening of the annular hearth furnace for loading and unloading from above or from the side with a horizontal in the ceiling or on the outer circumference of the
- Figure 1 in a longitudinal section of a plant for the thermal treatment of aluminum ingots with a means for
- Figure 2 shows the annular hearth furnace of Figure 1 in plan view
- Figure 3 is a plan view of a ring hearth furnace as before in Figure 1, in contrast, has an opening for loading and a separate opening for discharging the aluminum ingots
- Figure 4 is a schematic plan view of the ceiling side a loading and
- Figure 5 is a plan view as before in Figure 4, in contrast, with two-lane
- Figure 6 is a plan view as before in Figure 5, in contrast with not
- the annular hearth furnace 1 consists of an outer housing 3 and an inner housing 4, the inside complete with a heat insulation 3a, 4a, z. As ceramic and mineral mats are provided.
- the furnace chamber or the hearth interior 1 a closing furnace roof 6 is also with a
- Rotary ring hearth bottom 7a which is sealed here opposite the furnace housing or the furnace bottom 7 on both sides, ie the separation points, via a circumferential water cup 9.
- the rotary-driven ring hearth bottom 7 a is mounted on fixed rollers 10 and is of a frequency-controlled electric motor 1 1 driven, which meshes via a pinion 12 with a ring gear 13 of the ring hearth bottom 7a.
- Furnace housings are for the introduction of cooling air and removal of exhaust gases
- the loading and unloading of the ring hearth furnace 1 is carried out in the embodiments from above by means of the hall crane, to which the loading and unloading opening 15 can be temporarily temporarily opened and closed by a horizontally movable in the ceiling 6 by an electric motor with rack drive oven door 16.
- the aluminum ingots are in the from Figure 1 to
- two openings 15a, 15b can be provided adjacent to each other in the furnace roof instead of the one loading and unloading opening 15, which can alternately be closed or opened alternately by a horizontally displaceable oven door 16, wherein the opening 15a of Charge with cold aluminum ingots and the opening 15b is used for unloading or removal of the heated aluminum ingots.
- a divider 18 provides thermal separation of the "hot" unloading station from the "cold" loading station.
- the annular hearth furnace 1 For heating or heating and / or homogenization of the aluminum ingots 2, the annular hearth furnace 1, to which a higher-level process control system or a higher-level computer is assigned for regulation and control, not shown, formed with means for convection heating.
- FIGS. 2 and 3 With the exception of the area of the loading and unloading opening 15 or the openings 15a, 15b for loading and removal on the oven roof 6, they are in alignment with the rotary drive
- Ring hearth bottom 7a lying circumferentially distributed numerous circulation fans 19 arranged, the ends with their vanes 19a in the hearth interior 1 a with some air above the upright aluminum ingots 2 ends.
- Heating means 20a, 20b arranged in the form of gas burners arranged on an outer burner ring and an inner burner ring, which are provided with their
- Burner tubes 21 on the one hand close to the outer housing 3 and its
- Heating means applies - up to the furnace bottom 7 out extending pressure channels 22 formed distributed over the height of numerous slot nozzles 32, the air outlets are aligned with the narrow longitudinal sides 24 of the switched on or off aluminum rolling ingots 2.
- Blowing air used in the forward and return of the circulator built-in thermocouples, for measuring the temperature of the aluminum ingots 2 are in each of a circulating fan 19 with his
- Impact range predetermined fan zone in the embodiment of Figure 1 from the outside through the inner housing 4 with its measuring lances 27 in the ring hearth inside 1 a dipping, electromechanically operated pressure-thermocouples 28 is provided.
- a heating process can thus be controlled and regulated.
- a heating process begins after the glow plug to be used has been called from the PLC. This can be done so that the air temperature is set to an overtemperature (max 650 ° C) and automatically to this
- the ingots for example, 1350 mm wide, 600 mm thick and 4500 mm long, can be variable
- FIG. 6 shows a two-lane load, as previously in FIG. 5, but not with aluminum rolling bars 2 arranged radially in series, but rather the aluminum rolling bars 2 are of concentric inner Circular path offset to the aluminum ingots 2 of the outer circular path in the hearth interior 1 a turned off.
- Discharge position namely predetermined by the in the embodiments with at least one in the furnace roof 6 horizontally movable oven door 16th
- the two-lane loading enables the highest possible throughput with correspondingly high batch weights.
- Aluminum rolling ingots with convection heating trained annular hearth furnace brings compared to the used in industry shock and Tieföfen numerous advantages with it, as achieved by the small loading and unloading, minimized heat loss, high thermal efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Tunnel Furnaces (AREA)
- Furnace Details (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014203494 | 2014-02-26 | ||
DE102015203376.7A DE102015203376A1 (de) | 2014-02-26 | 2015-02-25 | Verfahren und Anlage zur thermischen Behandlung von langgestrecktem, flachem metallischen Gut, insbesondere Aluminium-Walzbarren, in einem Ringherdofen |
PCT/EP2015/054016 WO2015128416A1 (de) | 2014-02-26 | 2015-02-26 | Verfahren und anlage zur thermischen behandlung von langgestrecktem, flachem metallischen gut, insbesondere aluminium-walzbarren, in einem ringherdofen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3110981A1 true EP3110981A1 (de) | 2017-01-04 |
EP3110981B1 EP3110981B1 (de) | 2018-10-10 |
Family
ID=53782725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15711059.4A Not-in-force EP3110981B1 (de) | 2014-02-26 | 2015-02-26 | Verfahren und anlage zur thermischen behandlung von langgestrecktem, flachem metallischen gut, insbesondere aluminium-walzbarren, in einem ringherdofen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3110981B1 (de) |
CN (1) | CN106170568B (de) |
DE (1) | DE102015203376A1 (de) |
WO (1) | WO2015128416A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109839005B (zh) * | 2017-11-27 | 2023-09-29 | 拉萨圣泽汇丰实业有限公司 | 高效利用间歇式电源的节能环保电热窑炉*** |
CN108709429A (zh) * | 2018-05-31 | 2018-10-26 | 湖南省长宁炭素股份有限公司 | 一种炭素煅烧单体炉的炉盖 |
CN109321722B (zh) * | 2018-10-09 | 2023-05-05 | 嘉兴中茂工业炉有限公司 | 一种球化退火炉 |
CN109593926B (zh) * | 2019-01-26 | 2024-02-06 | 江西耐乐铜业有限公司 | 一种运用退火炉均匀炉温的对流吹风式的双炉盖结构 |
DE102019108873A1 (de) * | 2019-04-04 | 2020-10-08 | Schwartz Gmbh | Drehherdofen zur Wärmebehandlung von metallischen Werkstücken und entsprechendes Verfahren zur Wärmebehandlung |
EP3868902B1 (de) * | 2020-02-21 | 2022-09-21 | C.R.F. Società Consortile per Azioni | Verfahren zum formen eines blechs zu einem komplexen bauteil mit bereichen unterschiedlicher mechanischer eigenschaften, insbesondere ein fahrzeugbauteil, sowie ofen zum erwärmen eines blechs vor dem umformen. |
EP3868901B1 (de) * | 2020-02-21 | 2022-09-21 | C.R.F. Società Consortile per Azioni | Verfahren zum formen eines metallblechs zu einem komplexen bauteil mit bereichen unterschiedlicher mechanischer eigenschaften, insbesondere ein fahrzeugbauteil, und ofen zum erwärmen eines blechs vor dem umformen. |
CN114752752B (zh) * | 2022-04-28 | 2023-05-23 | 江西中臻通讯科技有限公司 | 一种磷青铜合金线退火生产工艺用的退火炉 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3063878A (en) * | 1958-05-07 | 1962-11-13 | Wilson Lee | Method of and apparatus for annealing |
DE2758292C2 (de) | 1977-12-27 | 1980-01-10 | Thyssen Ag Vorm. August Thyssen Huette, 4100 Duisburg | Tiefofen mit aufsetzbarem Deckel |
DE3231225A1 (de) * | 1982-08-21 | 1984-03-01 | Verwaltungsgesellschaft Heinrich Neitz GmbH & Co KG, 4930 Detmold | Ofen zur waermebehandlung und durchfuehrung von waermeprozessen fuer werkstuecke aus eisenwerkstoffen und nichteisenmetallen |
JPS60262924A (ja) * | 1984-06-08 | 1985-12-26 | Rozai Kogyo Kk | 回転炉床式コイル加熱炉 |
DE8422370U1 (de) | 1984-07-27 | 1986-09-11 | Daimler-Benz Ag, 7000 Stuttgart | Drehherdofen in Ringbauart zur Wärmebehandlung von Werkstücken |
US4817920A (en) * | 1984-11-21 | 1989-04-04 | Salem Furnace Co. | Apparatus for continuous heat treatment of metal strip in coil form |
DE19739697C1 (de) * | 1997-09-02 | 1999-02-18 | Manfred Dr Ing Ottow | Verfahren und Vorrichtung zur Eisenerzreduktion |
CA2548786C (en) * | 2004-08-25 | 2009-06-09 | Nippon Furnace Kogyo Kaisha, Ltd. | Hot-air circulation furnace |
DE102009053343B4 (de) | 2009-11-17 | 2012-08-30 | Otto Junker Gmbh | Stoßofen, Ofenanlage und thermisches Behandlungsverfahren |
EP2511639B1 (de) * | 2011-04-13 | 2015-01-28 | LOI Thermprocess GmbH | Drehherdofen |
-
2015
- 2015-02-25 DE DE102015203376.7A patent/DE102015203376A1/de not_active Withdrawn
- 2015-02-26 CN CN201580010594.7A patent/CN106170568B/zh not_active Expired - Fee Related
- 2015-02-26 EP EP15711059.4A patent/EP3110981B1/de not_active Not-in-force
- 2015-02-26 WO PCT/EP2015/054016 patent/WO2015128416A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
CN106170568B (zh) | 2018-04-13 |
WO2015128416A1 (de) | 2015-09-03 |
DE102015203376A1 (de) | 2015-08-27 |
EP3110981B1 (de) | 2018-10-10 |
CN106170568A (zh) | 2016-11-30 |
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