WO1996028702A1 - Refractory moulding for revolving hearth furnaces - Google Patents
Refractory moulding for revolving hearth furnaces Download PDFInfo
- Publication number
- WO1996028702A1 WO1996028702A1 PCT/DE1996/000270 DE9600270W WO9628702A1 WO 1996028702 A1 WO1996028702 A1 WO 1996028702A1 DE 9600270 W DE9600270 W DE 9600270W WO 9628702 A1 WO9628702 A1 WO 9628702A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- annealing material
- annealing
- bulge
- rotary hearth
- refractory
- Prior art date
Links
Classifications
-
- 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
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0025—Supports; Baskets; Containers; Covers
-
- 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
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
-
- 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
-
- 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
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0043—Floors, hearths
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/12—Travelling or movable supports or containers for the charge
-
- 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
- F27D5/00—Supports, screens, or the like for the charge within the furnace
Definitions
- the invention relates to a fireproof molded part for lining the bottom of rotary hearth furnaces for cylindrical or tubular annealing material, with an approximately part-circular receptacle for the annealing material running in the longitudinal direction of the annealing material.
- rotary hearth furnaces are also used, in which the blanks are placed on the bottom of the rotary hearth furnace by means of a charging device, for example a charging manipulator, and after they have passed through the furnace in the hot condition can be removed for further processing.
- a charging device for example a charging manipulator
- cylindrical or tubular annealing material is annealed, radially extending, approximately part-circular receptacles are provided in the refractory base plate of the rotary hearth furnace, which are intended to prevent the annealing material from being able to move on the base plate by rolling away sideways.
- This progressive wear and tear not only weakens or destroys the floor cladding, there is also a loss of quality in the annealed material, as there is an ever smaller area of the annealing material protrudes above the hearth and is available for direct heating by the furnace atmosphere or heat radiation. This results in uneven heating across the annealed material cross section, which can result in radial deviations of the mandrel, for example, in the manufacture of tubes from solid cylinders on a punch press or an inclined rolling mill.
- the mechanism described also reduces the efficiency of the furnace and the heating rate of the annealing material, so that the annealing times may have to be extended.
- a new lining of the base plate and a longer standstill of the rotary hearth furnace associated therewith becomes unavoidable when the blanks are lowered into the base plate to such an extent that they can no longer be grasped and removed by the charging manipulator.
- the invention has for its object to provide a fireproof molded part for the bottom lining of rotary hearth furnaces for cylindrical or tubular annealing material, with which the availability of the furnace can be increased and the quality of the annealing material can be improved.
- the receptacle is formed on the upper side facing the annealing material of a bulge which extends in the longitudinal direction of the annealing material and which rises above the base of the rotary hearth and has a cross section which tapers upwards.
- the wear path of the refractory material beneath the annealing material is significantly increased, without causing an impermissible covering of the circumferential side surfaces of the annealing material can get into the floor lining by lowering.
- the availability of the furnace and the service life of the refractory lining can be almost doubled, with a more uniform heating of the annealing material and thus a corresponding improvement in the quality or simplification of the further processing.
- the risk of the piercing mandrel running sideways is significantly reduced.
- the lateral flanks of the bulge preferably make an angle of between approximately 30 and 60 ° to the horizontal. With this configuration of the lateral flanks, the thermal stresses and shear forces that occur can be optimally dissipated into the interior of the molded part without major spalling.
- the individual molded parts are inserted into the base lining in such a way that the bulges run radially in the longitudinal direction of the annealing material to the axis of rotation of the base of the rotary hearth.
- the radius of the part-circular receptacle can be made smaller than the radius of the annealing material. This results in a linear two-point load on the lateral edges of the receptacle, as a result of which there is a certain amount of lead in these areas Wear is caused, which however leads to an increase in the surface of the annealing material available for heating. This effect also arises when the cold annealing material increases its diameter due to the heating and thus there is an increased load on the lateral edges of the receptacle.
- the base width of the bulge at the level of the base of the hearth is preferably not greater than the diameter of the annealing material. This prevents lateral webs from forming that cover the annealed material laterally.
- two or more bulges or receptacles can be provided, so that the new lining of the base lining is simplified.
- the finished molded parts according to the invention consist of highly wear-resistant refractory materials and can be produced industrially, for example, by stamping, casting and vibrating or pressing.
- FIG. 1 shows a conventional molded part for the bottom lining of rotary hearth furnaces for cylindrical annealing material
- Fig. 2 shows a wear pattern of a molded part.
- Fig. 3 shows a molded part according to the invention
- Fig. 4 shows a wear pattern of a molded part.
- Fig. 1 consists essentially of an approximately cuboid stone 1 with two partial circular shape extending in the longitudinal direction of the annealing material recordings 2.
- the molded part 3 according to FIG. 3 likewise consists of an approximately cuboid base body 4 with part-circular receptacles 6 running in the longitudinal direction of the annealing material 5.
- the receptacles 6 are formed on the top of bulges 7, the lateral flanks 8 of which form an angle of approximately 45 ° with the horizontal.
- the wear pattern shown in FIG. 4 shows that, in contrast to the prior art, the depth of wear can be increased considerably without inadmissible covering of the circumferential surface of the annealing material 5.
- the covered angular range which results in a conventional molded part 1 after a wear of 50 mm corresponds approximately to that which occurs in the molded part 3 according to the invention after a wear of 90 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Tunnel Furnaces (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59602094T DE59602094D1 (en) | 1995-03-11 | 1996-02-14 | FIRE-RESISTANT MOLDED PART FOR LATHE |
CZ19972767A CZ287826B6 (en) | 1995-03-11 | 1996-02-14 | Refractory block for rotary-hearth furnaces |
EP96903882A EP0815405B1 (en) | 1995-03-11 | 1996-02-14 | Refractory moulding for revolving hearth furnaces |
BR9607653A BR9607653A (en) | 1995-03-11 | 1996-02-14 | Refractory molded part for rotary crucible ovens |
SK1209-97A SK120997A3 (en) | 1995-03-11 | 1996-02-14 | Refractory moulding for revolving hearth furnaces |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19508848.4 | 1995-03-11 | ||
DE19508848A DE19508848C2 (en) | 1995-03-11 | 1995-03-11 | Refractory molded part for rotary hearth furnaces |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996028702A1 true WO1996028702A1 (en) | 1996-09-19 |
Family
ID=7756429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/000270 WO1996028702A1 (en) | 1995-03-11 | 1996-02-14 | Refractory moulding for revolving hearth furnaces |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0815405B1 (en) |
BR (1) | BR9607653A (en) |
CZ (1) | CZ287826B6 (en) |
DE (2) | DE19508848C2 (en) |
ES (1) | ES2134590T3 (en) |
SK (1) | SK120997A3 (en) |
WO (1) | WO1996028702A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2325757A (en) * | 1942-06-09 | 1943-08-03 | Ehlers Edward | Heating furnace |
DE1281470B (en) * | 1966-05-04 | 1968-10-31 | Beck U Kaltheuner O H G | Shaped stone for rotary cookers |
DE1919982A1 (en) * | 1968-04-25 | 1969-11-06 | Arloffer Thonwerke Gmbh | Device for drying and burning stoneware pipes |
GB2063801A (en) * | 1979-11-27 | 1981-06-10 | Salviati Impianti Spa | A truck or the like for conveying ceramic articles through a kiln |
US4412813A (en) * | 1982-02-02 | 1983-11-01 | Alco Standard Corporation | Rotary hearth furnace and method of loading and unloading the furnace |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1967747U (en) * | 1966-03-07 | 1967-09-07 | Schulte Fa D W | WEAR COOKER FOR ROTARY FURNACES IN THE STEEL AND METAL INDUSTRY. |
-
1995
- 1995-03-11 DE DE19508848A patent/DE19508848C2/en not_active Expired - Fee Related
-
1996
- 1996-02-14 ES ES96903882T patent/ES2134590T3/en not_active Expired - Lifetime
- 1996-02-14 WO PCT/DE1996/000270 patent/WO1996028702A1/en active IP Right Grant
- 1996-02-14 BR BR9607653A patent/BR9607653A/en not_active IP Right Cessation
- 1996-02-14 DE DE59602094T patent/DE59602094D1/en not_active Expired - Lifetime
- 1996-02-14 SK SK1209-97A patent/SK120997A3/en unknown
- 1996-02-14 CZ CZ19972767A patent/CZ287826B6/en not_active IP Right Cessation
- 1996-02-14 EP EP96903882A patent/EP0815405B1/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2325757A (en) * | 1942-06-09 | 1943-08-03 | Ehlers Edward | Heating furnace |
DE1281470B (en) * | 1966-05-04 | 1968-10-31 | Beck U Kaltheuner O H G | Shaped stone for rotary cookers |
DE1919982A1 (en) * | 1968-04-25 | 1969-11-06 | Arloffer Thonwerke Gmbh | Device for drying and burning stoneware pipes |
GB2063801A (en) * | 1979-11-27 | 1981-06-10 | Salviati Impianti Spa | A truck or the like for conveying ceramic articles through a kiln |
US4412813A (en) * | 1982-02-02 | 1983-11-01 | Alco Standard Corporation | Rotary hearth furnace and method of loading and unloading the furnace |
Also Published As
Publication number | Publication date |
---|---|
EP0815405B1 (en) | 1999-06-02 |
ES2134590T3 (en) | 1999-10-01 |
CZ287826B6 (en) | 2001-02-14 |
DE19508848C2 (en) | 1998-11-26 |
SK120997A3 (en) | 1998-05-06 |
BR9607653A (en) | 1998-06-16 |
DE19508848A1 (en) | 1996-09-12 |
EP0815405A1 (en) | 1998-01-07 |
DE59602094D1 (en) | 1999-07-08 |
CZ276797A3 (en) | 1997-12-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3787791T2 (en) | Shredding elements for shredding machines. | |
DE69107746T2 (en) | Process for producing a bimetallic casting and wearing part using this process. | |
DE2713571A1 (en) | PRESS FOR SHAPING SHEET METALS | |
DE102019204836B3 (en) | Eccentric roller crushing jaw set and eccentric roller crushing system comprising such a crushing jaw set | |
EP0659108A1 (en) | Roller presses, in particular for crushing strongly abrasive substances | |
EP0790426A2 (en) | Method for manufacturing a flat friction disc | |
DE2354844C2 (en) | Grinding bowl lining | |
DE2913568C2 (en) | ||
EP0795352B1 (en) | Swing-hammer crusher for plates or similar material | |
EP0815405B1 (en) | Refractory moulding for revolving hearth furnaces | |
EP0799391B1 (en) | Thermal treatment process and device for friction lining surfaces | |
EP4294572A1 (en) | High-pressure roller press | |
EP2733451A1 (en) | Cooling element for metallurgical furnace | |
WO2011038919A1 (en) | Pellet press for producing pellets | |
DE10016096C2 (en) | Furnace for annealing steel strips coiled into coils and method for annealing them | |
DE102006051683B4 (en) | Method for processing disc springs or corrugated springs by shot blasting | |
EP1651389B1 (en) | Composite tool for percussive and/or abrasive strains | |
DE1577153C (en) | Process for producing piston ring blanks and system for carrying out the process | |
AT230168B (en) | Process for the production of composite strips to be pressed into bearing shells from a sheet steel cylinder provided with a bearing metal layer in a centrifugal process | |
EP0424621B1 (en) | Method for manufacturing a plate for sliding gate valve used in metallurgy | |
DE2649801C3 (en) | Segment roller for a briquetting or compacting roller press | |
DE6909775U (en) | FRICTION ELEMENT | |
AT372896B (en) | DEVICE FOR PRODUCING A GRINDING TOOL | |
EP1060815B1 (en) | Process for fabricating forged wide side walls of a continuous casting mould | |
DE2600395C3 (en) | Ultra high pressure apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): BR CZ SK |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1996903882 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: PV1997-2767 Country of ref document: CZ |
|
WWE | Wipo information: entry into national phase |
Ref document number: 120997 Country of ref document: SK |
|
WWP | Wipo information: published in national office |
Ref document number: PV1997-2767 Country of ref document: CZ |
|
WWP | Wipo information: published in national office |
Ref document number: 1996903882 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1996903882 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: PV1997-2767 Country of ref document: CZ |