EP0099383A1 - Four de prechauffage de materiaux allonges. - Google Patents

Four de prechauffage de materiaux allonges.

Info

Publication number
EP0099383A1
EP0099383A1 EP83900423A EP83900423A EP0099383A1 EP 0099383 A1 EP0099383 A1 EP 0099383A1 EP 83900423 A EP83900423 A EP 83900423A EP 83900423 A EP83900423 A EP 83900423A EP 0099383 A1 EP0099383 A1 EP 0099383A1
Authority
EP
European Patent Office
Prior art keywords
hearth
heating furnace
burners
tunnel
shells
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
EP83900423A
Other languages
German (de)
English (en)
Other versions
EP0099383B1 (fr
Inventor
Friedrich Wilhelm Elhaus
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT83900423T priority Critical patent/ATE20280T1/de
Publication of EP0099383A1 publication Critical patent/EP0099383A1/fr
Application granted granted Critical
Publication of EP0099383B1 publication Critical patent/EP0099383B1/fr
Expired legal-status Critical Current

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
    • F27B9/20—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 substantially straight path tunnel furnace
    • 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
    • C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length

Definitions

  • the invention relates to a heating furnace for elongated goods, such as bars, blocks, bars or the like. , made of metal, in particular aluminum or aluminum alloys, with a hearth tunnel formed from continuous or segment-wise refractory, in particular thin-walled shells, which passes through the shell walls and heating elements, such as burners, hot gas nozzles or the like, which can be heated to that in the hearth tunnel longitudinally used material is directed to its direct application, as well as with an exhaust gas duct arranged in the upper furnace area.
  • a heating furnace for elongated goods such as bars, blocks, bars or the like.
  • the thin-walled hearth shells are inserted into the furnace structure without heat insulation. This leads to heat losses, in particular due to radiation from the outer walls of the hearth shells.
  • the exhaust gas is extracted into the exhaust duct through a gap at the top of the hearth tunnel. Heat is lost when the gas travels between the hearth tunnel and the exhaust duct. Therefore, the efficiency of the known furnace is low.
  • the known construction is complicated and high due to the separate arrangement of the exhaust gas duct above the hearth tunnel.
  • the invention has for its object to provide a heating furnace of the type mentioned so that the energy supplied for heating is used more effectively with a simple, compact construction.
  • the invention provides that the hearth tunnel is integrated in a heat insulation having 'exhaust passage.
  • the thermal insulation of the exhaust gas duct covers the hearth shells of the hearth tunnel from the outside at least in their central area, so that the lower areas of the hearth shells remain free for assembly and maintenance purposes.
  • a significantly improved energy efficiency e is due to the fact that the exhaust gas without any heat loss from the hearth tunnel, for example through the upper gap between the. vertical cooker halves into which the exhaust duct is transferred. Due to the construction according to the invention, the middle and upper area of the hearth tunnel is through the exhaust duct itself, ie. H. sufficient thermal insulation without any additional measures. Thermal insulation of the lower part of the tunnel is deliberately dispensed with in favor of better accessibility for assembly and maintenance purposes. According to the inventor's knowledge, the losses of radiant heat in the lower areas of the cooker shells are relatively small. The omission of heat insulation in these lower areas is very advantageous because of the space for the reception and access! Safety of units, such as burners, support frames for the cooker trays, and the conveyor for the goods to be heated remains.
  • the isolating parts can protrude vertically from the support parts or nestle against the upper areas of the hob shells.
  • a further development of the invention which is particularly advantageous with regard to simple assembly and disassembly is characterized in that the heat insulation is supported by support parts which are fixedly attached to a support frame of the oven and has removable insulating parts arranged above it, the lower ones of which the side of the hearth shells support and isolate.
  • the burners of the upper burner rows penetrate removable insulating parts, while the burners of the lower burner rows e > are provided in the lower, non-heat-insulated area of the hob shells, and that each insulating part penetrated by burners has the same * length as the corresponding segments of the hob shells.
  • the invention provides that all burner rows open into the hearth tunnel below the heat insulation and that the exhaust duct is designed as a removable assembly unit.
  • This version is in terms of a simple assembly 'maintenance and training 10 exchange the oven trays particularly favorable, because the exhaust duct as a whole can be removed so that an exchange of individual or' oven trays is easily possible.
  • the hot exhaust gas 15 is conducted from the flue gas duct into a preheating zone of the preheating furnace or another furnace for preheating the material (DE-OS 2637646.L, which ensures particularly economical fuel utilization.
  • a preheating zone of the preheating furnace or another furnace for preheating the material DE-OS 2637646.L, which ensures particularly economical fuel utilization.
  • Advantageous in this context is one Qfen embark., in which the 'Anchenrmofen with its exhaust gases a pre scarf eten beAlb precalciner 20 of the exhaust gas via at least one fan to at least one of he Rei ⁇ along the Good arranged Schl.itzriüsen leads and deflected onto the product through this.
  • the construction according to the invention is particularly advantageous if the furnace space of the heating furnace is subdivided into a plurality of heating and control zones which are connected via the common flue gas duct. If individual zones are switched off when the target temperature is reached, they will be switched through the other zones despite the connection
  • the flue gases only flow longitudinally in the upper p. 30 area in the common flue gas duct, advantageously in a preheating zone or for preheating the material in an upstream preheating furnace 3 in this way in a group of furnaces from the preheating furnace and the preheating furnace connected in series the 'heat - :. nhalt optimum use of the fuel.
  • FIG. 1 shows a cross section along the line I-I in Figure 3 by a first embodiment of a heating furnace according to the invention.
  • FIG. 3 shows a partially sectioned side view through a furnace group comprising a preheating furnace and an upstream preheating furnace according to an embodiment of the invention
  • Fig. 4 shows a section along the line IV-IV in Fig. 3 by a
  • Preheating furnace of the furnace group which is connected upstream of a heating furnace according to FIGS. 1 or 2.
  • the heating furnaces shown have a support frame 10 made of a steel structure.
  • a double-strand conveyor chain 13 with attached support devices 12 for the material 1 to be heated such as
  • Rods or bars are provided which intermittently transport the material through the cylindrical hearth tunnel 15 formed by half-cylindrical hearth shell halves 14.
  • the stove peels 14 are in their lower
  • only one burner row with pre-burners 18 arranged in longitudinal rows perpendicular to the plane of the drawing are provided per hearth bowl row 14.
  • the burners 1 & have burner nozzles 20 which protrude through openings 21 of the hearth shells into the cylindrical hearth tunnel 15 and act directly on the material.
  • the burners 18 are arranged in such a way that when the material 1 of different diameters is warmed up, good use of the surface for heat transfer and rotationally symmetrical temperature distribution over the cross section of the material is achieved.
  • the burner nozzles 20 are set in their performance so that the desired temperature distribution is generated.
  • hot gas nozzles can also be provided for heating, which act on the material 1, for example with hot air, which can be heated electrically in a known manner.
  • the exhaust gases leave the hearth space 15 upwards through a longitudinal gap 30 formed by the hearth shell halves 14 at the spacers 17, from which they pass directly into an exhaust gas channel 32 via a vertical channel 31. From this, the exhaust gas is conveyed into a preheating zone (not shown) for the material 1, which precedes the preheating furnace, for. B. sucked by means of fans, not shown. From the- gas duct has thermal insulation, the lower insulating parts 54 of which extend over the entire length of the furnace, leave a gap for the hearth tunnel 15 and can be placed on the middle regions of the hearth shells 14 from the outside.
  • the lower insulating parts 54 are supported by supports 52 which are fixedly attached to the support frame 10.
  • the main or upper section of the exhaust duct 32 is formed by two vertical insulating parts 56 and an upper insulating part 58 which is integral therewith.
  • the insulating parts 56, 58 of the upper part also extend over the entire length of the furnace.
  • the main section 56, 58 can thus be removed as a whole.
  • the hearth shells 14 are then held laterally by the lower insulating parts 54, but after removal of the spacers 17 can be removed individually by gently pivoting inward about the respective pivot point on the mounting rails 16 for replacement.
  • the heat insulation has e.g. B. two layers, of which the inner consists of good heat-insulating but poorly storing ceramic fibers, while the outer layer, which is in the range of lower temperatures, consists of mineral fibers.
  • FIG. 2 differs from that according to FIG. 1 only in that in addition to the lower row of burners 18, an upper row of burners 19 is provided for each range of stoves.
  • An adjustable throttle valve 24 is arranged in the fuel feed line 23 in order to set the upper burners in relation to the lower burners.
  • the additional upper rows of burners require the interposition of vertical isolating parts 59, which are divided into segments corresponding to the hearth shells 14, between the lower isolating parts 54 extending over the entire length of the furnace and the main or upper part of the exhaust channel 32, the insulating parts 60, 62, 64, in turn, a composite ⁇ continuous, uniform whole constitute as wegappelbares piece.
  • piece 60, 62, 64 must be lifted off.
  • the corresponding insulating parts 59 must be removed so that the associated hearths 14 can be replaced after removing the spacers as in the embodiment according to FIG. 1.
  • the somewhat more complicated structure in comparison with FIG. 1 is the price for the higher uniformity of the heating of the material achieved.
  • Fig. 3 shows in the right half a side view of a preheating furnace designated here by 90 according to Fig. 1 or Fig. 2 and in the left half a pre-preheating furnace which is heated by the exhaust gases of the preheating furnace.
  • the exhaust gas duct 32 opens out via an opening 33 in the right-hand end wall 34 in FIG. 3 of the preheating furnace, which is designated overall by the reference number 40 and is shown in more detail in FIG. 4.
  • the material 1 is conveyed through treatment rooms 45 of each circulation zone 4 by means of the double-strand conveyor chain 13 in the transport direction T, which passes through both ovens 40, 90.
  • the exhaust gas is then sucked out of the treatment rooms 45 by means of the fans 43 and recirculated or discharged through a fume hood 46.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Details (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

Un four de préchauffage de matériaux allongés, notamment des tiges, barres ou autres en alliage léger, contenant un foyer en forme de tunnel (15) composé de soles concaves (14) où le matériau (1) à préchauffer est introduit. Au moins sur leur partie moyenne, les soles concaves sont recouvertes d'une isolation thermique qui comprend des parties isolantes (54, 56) amovibles. Les parties isolantes (54, 56) sont repliées vers le haut au-dessus des soles concaves (14) et forment un canal d'échappement (32) dans lequel est intégré le foyer en forme de tunnel. L'on obtient ainsi une isolation thermique du four de préchauffage facile à monter et à démonter, ce qui améliore considérablement l'utilisation de l'énergie de chauffage.
EP83900423A 1982-02-02 1983-02-01 Four de prechauffage de materiaux allonges Expired EP0099383B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83900423T ATE20280T1 (de) 1982-02-02 1983-02-01 Anwaermofen fuer langgestrecktes gut.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3203433A DE3203433C2 (de) 1982-02-02 1982-02-02 Anwärmofen für langgestrecktes Gut
DE3203433 1982-02-02

Publications (2)

Publication Number Publication Date
EP0099383A1 true EP0099383A1 (fr) 1984-02-01
EP0099383B1 EP0099383B1 (fr) 1986-06-04

Family

ID=6154561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83900423A Expired EP0099383B1 (fr) 1982-02-02 1983-02-01 Four de prechauffage de materiaux allonges

Country Status (6)

Country Link
US (1) US4541799A (fr)
EP (1) EP0099383B1 (fr)
AU (1) AU556135B2 (fr)
CA (1) CA1202174A (fr)
DE (2) DE3203433C2 (fr)
WO (1) WO1983002661A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3418603C1 (de) * 1984-05-18 1985-03-21 Schweizerische Aluminium Ag, Chippis Anwaermofen fuer zylindrische Gueter
DE3434906C2 (de) * 1984-09-22 1993-03-04 Otto Junker Gmbh, 5107 Simmerath Vorrichtung zum Vorwärmen von metallischem Gut
DE19538364C5 (de) * 1995-10-14 2007-05-24 Carl Prof. Dr.-Ing. Kramer Vorrichtung zur Schnellerwärmung von Metall-Preßbolzen
IT1281108B1 (it) * 1995-12-27 1998-02-11 Siem Sas Di Barbero & C Forno a gas per il riscaldo in continuo di barre metalliche
DE19943354C1 (de) * 1999-09-10 2001-05-23 Carl Kramer Vorrichtung zur gleichmäßigen Schnellerwärmung von Pressbolzen oder Stangen, insbesondere aus Leichtmetalllegierungen
ATE258236T1 (de) * 1999-09-10 2004-02-15 Carl Kramer Verfahren zur wärmebehandlung von metallischen pressbolzen
GB0127420D0 (en) * 2001-11-15 2002-01-09 Furnace Construction Co Ltd Incineration apparatus
DE102004020206A1 (de) * 2004-04-22 2005-11-10 Expert Engineering Gmbh Verfahren zum Behandeln von Stranggussstangen oder Stranggussbolzen
DE102006028712B4 (de) * 2006-06-20 2012-02-02 Otto Junker Gmbh Bolzenerwärmungsofen und Verfahren zur Bolzenerwärmung
DE102007062551B4 (de) * 2007-12-20 2012-02-23 Otto Junker Gmbh Vorrichtung und Verfahren zur Erwärmung von Metallbolzen
CN102325609A (zh) * 2009-02-23 2012-01-18 压力技术有限公司 特别适用于铝型材、棒材或铝锭的物料预热装置和配备该预热装置的设备
DE102011016260B4 (de) * 2011-04-06 2013-06-06 Otto Junker Gmbh Vorrichtung und Verfahren zum Erwärmen von Metallbolzen
ITMI20110848A1 (it) * 2011-05-13 2012-11-14 Danieli Off Mecc Apparato per il trattamento termico in linea di semilavorati metallurgici
FR3018344B1 (fr) * 2014-03-04 2016-04-29 Cockerill Maintenance & Ingenierie Sa Four industriel pour chauffer des produits tels des produits siderurgiques
WO2016020546A1 (fr) * 2014-08-08 2016-02-11 I.C.M.I. S.R.L. Four de rechauffage pour barres metalliques
CN105318715B (zh) * 2015-10-30 2017-12-19 重庆丰银包装材料有限公司 积木式连续式加热炉

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1378710A (en) * 1914-06-16 1921-05-17 Dynamidon G M B H Lining for kilns
GB191517574A (en) * 1915-12-16 1916-07-13 Colin Frederick Price Improvements in Furnaces for Heating Billets for Tool Forgings and the like.
GB647053A (en) * 1946-10-08 1950-12-06 Bernard Joseph Moore Improvements in gas- or oil-fired tunnel kilns
US2603470A (en) * 1949-04-26 1952-07-15 Selas Corp Of America Method and apparatus for heating
US2948237A (en) * 1958-02-17 1960-08-09 Florian C Toepel Revolving hearth for a combustion chamber
DE1189438B (de) * 1959-09-28 1965-03-18 Keramische Ind Bedarfs Kom Ges Tunnelofen mit Muffelkanaelen
US3273218A (en) * 1965-05-04 1966-09-20 Armrock Products Inc Kiln for rapid firing single layers of ceramic articles
DE1807504B2 (de) * 1968-11-07 1974-01-31 Friedrich Wilhelm Dipl.Ing. 5600 Wuppertal Elhaus Durchlauferwärmungsofen für Metallblöcke, -stangen od.dgl
US3837794A (en) * 1973-07-16 1974-09-24 Granco Equipment Billet heating
DE2357920A1 (de) * 1973-11-20 1975-05-22 I Khim Fiz Akademii Nauk Ssr Ofen zum oxydfreien waermen von zu verguetendem werkstoff
FR2354524A1 (fr) * 1976-06-08 1978-01-06 Porcher Ets Perfectionnements apportes aux fours a ceramique
DE2637646B2 (de) * 1976-08-20 1978-08-10 Friedrich Wilhelm Dipl.- Ing. 5600 Wuppertal Elhaus Anwärmofen

Non-Patent Citations (1)

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Title
See references of WO8302661A1 *

Also Published As

Publication number Publication date
DE3203433C2 (de) 1984-08-09
CA1202174A (fr) 1986-03-25
US4541799A (en) 1985-09-17
AU1696083A (en) 1985-01-24
DE3363853D1 (en) 1986-07-10
WO1983002661A1 (fr) 1983-08-04
DE3203433A1 (de) 1983-08-25
AU556135B2 (en) 1986-10-23
EP0099383B1 (fr) 1986-06-04

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