EP3830507A1 - Roller hearth furnace - Google Patents
Roller hearth furnaceInfo
- Publication number
- EP3830507A1 EP3830507A1 EP19748502.2A EP19748502A EP3830507A1 EP 3830507 A1 EP3830507 A1 EP 3830507A1 EP 19748502 A EP19748502 A EP 19748502A EP 3830507 A1 EP3830507 A1 EP 3830507A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- scale
- furnace
- rollers
- roller hearth
- barriers
- 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
- 230000004888 barrier function Effects 0.000 claims abstract description 24
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 239000002657 fibrous material Substances 0.000 claims abstract description 12
- 239000003779 heat-resistant material Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 210000002268 wool Anatomy 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F27B9/24—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 being carried by a conveyor
- F27B9/2407—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 being carried by a conveyor the conveyor being constituted by rollers (roller hearth 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
- 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
- F27B9/24—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 being carried by a conveyor
-
- 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
- F27B9/30—Details, accessories, or equipment peculiar to 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B2009/3072—Balancing the pressure between the upper part and the lower part of the kiln, above and under the track
Definitions
- the invention relates to a roller hearth furnace, in particular tunnel furnace of a thin slab system, comprising a plurality of cooled furnace rollers, which are arranged at a distance from one another in the transport direction and which have a number of support rings on a rotatably mounted axis and in the axial area between two day rings and next to the for transporting a strip or a slab each outer support rings are formed with insulation made of a highly insulating fiber material, and scale funnels arranged below the furnace rollers.
- furnace rollers which are provided with insulation provided between and next to the support rings, are known from WO 2018/059940 A1.
- a roller hearth furnace with scale funnels arranged below the furnace rollers has become known, for example, from JP 64075887 A.
- the known furnace rollers of a roller hearth furnace or a tunnel furnace with support rings that transport a belt or a slab have water cooling in order to protect the furnace rollers from excessive temperatures and the associated premature failure.
- the associated heat extraction from the furnace or high energy consumption in the furnace is reduced in the furnace rollers by means of a heat insulation of the support axis made of a fiber material next to and between the support rings.
- the heat insulation further ensures that the heat treated material, strips or slabs are not inadmissibly cooled and, on the other hand, the supporting axis of the furnace roller is not inadmissibly heated.
- the oven rolls with thermal insulation made of, for example, a refractory, highly insulating fiber material or a fiber wool, which is Fiber material or the refractory wool is preferably aluminum oxide and / or silicon oxide, have a significantly lower weight than oven rolls known in the prior art with a more resistant thermal insulation made of concrete.
- a disadvantage of the fiber-insulated oven roll is that the highly insulating fiber material or fiber wool is attacked by scale or scale particles flying around and gradually removed or destroyed. As a result, the thermal insulation decreases and the furnace rollers with the support rings must be replaced prematurely.
- the invention is therefore based on the object of providing a device for a generic roller hearth furnace with which the negative effect of scale or scale particles on the fiber material or fiber wool can be significantly reduced and thus the service life of the fiber-insulated furnace roller can be increased.
- this object is achieved in that scale barriers extending transversely to the transport direction are provided in the spaces between each two furnace rolls which follow one another in the transport direction.
- the tinder detaching and flying around during transport is intercepted by the tinder barriers and into the respective tundish funnels is derived.
- the scale can therefore no longer penetrate into the insulating fiber material or the insulating fiber wool of the adjacent oven roll, which increases the service life of the heat insulation and, as a result, the service life of the heat-insulated oven roll.
- the energy saving of the roller hearth or tunnel oven is ensured over a longer period of time.
- axially adjacent to at least one of the support rings means in particular in the axial region between two support rings and / or axially next to at least one of the outer support rings.
- a preferred embodiment of the invention provides that the scale barriers are rod-shaped and consist of a heat-resistant material.
- the rod-shaped design of the scale barriers favors their simple lubrication position and arrangement between the adjacent furnace rollers.
- the rod-shaped scale barriers are preferably made of steel or refractory material or cast as a molded part.
- the arrangement or fastening of the scale barriers takes place on the funnel walls delimiting the scale funnels and / or self-supporting above the scale funnels.
- the scale barriers end somewhat below the transport plane of the oven rolls without contact with the transported goods. This means that there is no harmful mechanical impact of the scale barriers on the surface of the strip or slab facing them, but only that the detaching scale or scale particles are intercepted and discharged into the scale hopper. Further features and details of the invention result from the patent claims and the following description of an embodiment shown in the drawing.
- the single figure shows a schematic representation of an arrangement of cooled furnace rollers 1, which are provided in a roller hearth or tunnel furnace, not shown.
- the furnace rollers 1 transport a heat treatment material, for example a belt or a slab, through the roller hearth or tunnel furnace in the transport direction T.
- the furnace rollers 1 are designed in detail as known as such from WO 2018/059940 A1, i.e. its support axis is provided with thermal insulation made of a fiber material or a fiber wool.
- scale funnels 2 are provided, which are delimited by funnel walls 3 made of a refractory material.
- rod-shaped scale barriers 4 extending transversely to the transport direction T are provided.
- the scale barriers 4 are arranged on the one hand on the funnel walls 3 and on the other hand self-supporting, i.e. provided with fastening at each of their rod ends, above the scale funnels 2, the scale barriers 4 ending somewhat below the transport plane 5 of the furnace rollers 1 without contact with the transported heat treatment material, so that only a very small vertical gap between the transport plane 5 and the upper edges of the scale barriers 4 is present.
- the scale barriers 4 are made of steel or a refractory material or cast as a molded part.
- scale detaches from the heat treatment material, which then flies around in the vicinity of the furnace rollers 1 and attacks or destroys the insulation of the furnace rollers 1, which is made of fiber material or fiber wool.
- the scale accumulated in the scale funnels 2 can be disposed of via scale doors 6 provided at the lower end of the scale funnels 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Tunnel Furnaces (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018212703 | 2018-07-30 | ||
DE102018219927.2A DE102018219927A1 (en) | 2018-07-30 | 2018-11-21 | Roller hearth furnace |
PCT/EP2019/070183 WO2020025478A1 (en) | 2018-07-30 | 2019-07-26 | Roller hearth furnace |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3830507A1 true EP3830507A1 (en) | 2021-06-09 |
EP3830507B1 EP3830507B1 (en) | 2022-10-19 |
Family
ID=69149138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19748502.2A Active EP3830507B1 (en) | 2018-07-30 | 2019-07-26 | Use of scale barriers in a roller hearth furnace |
Country Status (7)
Country | Link |
---|---|
US (1) | US20210318067A1 (en) |
EP (1) | EP3830507B1 (en) |
KR (1) | KR20210038623A (en) |
CN (1) | CN112639383A (en) |
DE (1) | DE102018219927A1 (en) |
RU (1) | RU2769705C1 (en) |
WO (1) | WO2020025478A1 (en) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU392313A1 (en) * | 1968-09-17 | 1973-07-27 | FRAME OF THE METAL HIGH-SPEED HEATING SECTIONAL OVEN | |
EP0059093B1 (en) * | 1981-02-23 | 1984-05-16 | Encomech Product Development Limited | Heat shields |
SU1229537A1 (en) * | 1983-12-26 | 1986-05-07 | Липецкий политехнический институт | Continuous roller metal heating furnace |
JPH06103154B2 (en) * | 1987-01-30 | 1994-12-14 | 大同特殊鋼株式会社 | Maintenance equipment for Roller Hearth furnace |
JPS6475887A (en) | 1987-09-14 | 1989-03-22 | Daido Steel Co Ltd | Roller hearth type heating furnace |
SU1765655A1 (en) * | 1990-02-16 | 1992-09-30 | Производственное объединение "Ижсталь" им.50-летия СССР | Tunnel-type heat-treatment furnace |
US5230618A (en) * | 1992-02-24 | 1993-07-27 | Bricmanage, Inc. | Insulated furnace roller |
DE4411216B4 (en) * | 1994-03-31 | 2005-03-24 | Loi Thermprocess Gmbh | Walking beam furnace |
GB9407566D0 (en) * | 1994-04-12 | 1994-06-08 | Encomech Eng Services | Heat shields for rolling shields |
GB9510740D0 (en) * | 1995-05-26 | 1995-07-19 | Encomech Eng Services | Heat shields |
CN1152483A (en) * | 1995-09-13 | 1997-06-25 | 丹尼利机械厂联合股票公司 | Method of heating-furnace temp. having controlled soaking oxidation sorrounding and furnace embodied |
DE102013223040A1 (en) * | 2013-11-12 | 2015-05-13 | Sms Siemag Ag | Process for processing heated material |
DE102017208710A1 (en) | 2016-09-27 | 2018-03-29 | Sms Group Gmbh | Coolable furnace roll and method of operating such |
-
2018
- 2018-11-21 DE DE102018219927.2A patent/DE102018219927A1/en not_active Withdrawn
-
2019
- 2019-07-26 US US17/264,637 patent/US20210318067A1/en not_active Abandoned
- 2019-07-26 CN CN201980050970.3A patent/CN112639383A/en active Pending
- 2019-07-26 RU RU2021102325A patent/RU2769705C1/en active
- 2019-07-26 EP EP19748502.2A patent/EP3830507B1/en active Active
- 2019-07-26 KR KR1020217005625A patent/KR20210038623A/en not_active Application Discontinuation
- 2019-07-26 WO PCT/EP2019/070183 patent/WO2020025478A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
US20210318067A1 (en) | 2021-10-14 |
DE102018219927A1 (en) | 2020-01-30 |
CN112639383A (en) | 2021-04-09 |
KR20210038623A (en) | 2021-04-07 |
EP3830507B1 (en) | 2022-10-19 |
RU2769705C1 (en) | 2022-04-05 |
WO2020025478A1 (en) | 2020-02-06 |
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