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
  • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
  • C21D9/54—Furnaces for treating strips or wire
  • C21D9/56—Continuous furnaces for strip or wire
  • C21D9/562—Details
  • C21D9/563—Rolls; Drums; Roll arrangements
• • 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
• • 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 present invention relates to an apparatus for supporting the material to be treated in continuously operated thermal treatment furnaces, where the supporting of the material is realized by support elements external to the furnace.
• a material support device to be used in thermal treatment furnaces wherein on the circumference of a cooled roll, there are placed at least two cooled rolls with essentially smaller diameters.
• the larger roll, serving as the support device is installed externally to the thermal treatment furnace, or between two successive thermal treatment furnaces, so that the supporting proper of the material is carried out by means of one circumferentially placed roll at a time.
• the roll located on the circumference of the larger roll rotates at the rotational velocity of the material to be supported, whereas the mutual position of the circumferentially installed rolls can be adjusted by means of an actuator arrangement connected to the larger roll.
• the object of the present invention is to eliminate some of the drawbacks of the prior art and to realize and advanced supporting apparatus for material to be treated in thermal treatment furnaces, by means of which apparatus hot gases are made to flow, at the support apparatus, also underneath the material to be supported, without subjecting the smaller roll used for the support proper to an excessive thermal load.
• the support apparatus according to the invention for material to be treated in continuously operated thermal treatment furnaces can advantageously be installed essentially near to the orifice of a continuously operated thermal treatment furnace, so that the support apparatus enables an unobstructed flowing of the gas employed in the treatment of the material to be supported, both above and underneath said material.
• the support apparatus constitutes at least part of the thermal treatment furnace sealing.
• the support apparatus can also be advantageously installed for instance between two continuously operated thermal treatment furnaces, in which case the support apparatus forms part of the sealing of two successive thermal treatment furnaces.
• the support apparatus of material to be treated in continuously operated thermal treatment furnaces comprises a housing element, against which at least one support element used for supporting the material is arranged to rest. Against the same housing element, there are advantageously supported two support elements which are installed symmetri- cally with respect to the housing element. Moreover, the housing element is installed tumably with respect to the support elements, so that the mutual positions of the support elements can be exchanged by rotating the housing element around it axis.
• the housing element as such is installed essentially horizontally in the vicinity of the orifice of the continuously operated thermal treatment furnace, so that the housing element is advantageously supported by means of support members provided on both sides of the thermal treatment furnace orifice.
• the orifice of the thermal treatment furnace is formed of two essentially vertical walls that are interconnected by two essentially horizontal walls which are positioned on different levels.
• At the vertical walls of the orifice at each wall there is installed at least one sealing element, which in part seals the housing element against the thermal treatment furnace, when the support apparatus is in support position.
• In between the sealing elements providing for the sealing with the vertical walls of the orifice in connection with the housing element there is installed, advantageously concentrically, one or several elements constituting the sealing together with the horizontal wall, which elements at the same time serve, underneath the material to be supported, advantageously as the control elements of the thermal treat- ment furnace gas flowing from one thermal treatment furnace to another.
• the number of thermal treatment furnace gas control elements is at least two, in the interval formed by each control element there is advantageously installed, around the housing element of the support apparatus, concentrically at least one intermediate support element.
• the shape of the intermediate support element essentially conforms to the shape of the control element, but it is smaller than the control element, so that when seen from the end of the housing element of the support apparatus, the transversal area of the intermediate support element constitutes 70 - 90% of that of the respective control element.
• the intermediate support element can also be installed in the space left between the sealing element and the control element.
• the intermediate support element can be used in the support apparatus according to the invention also when only one control element is installed around the housing element.
• the support element of said apparatus which advantageously is roller-shaped, supports the material to be supported that proceeds at an essentially high velocity past the support element, so that the support element rotates at an essentially equal velocity with the material to be supported.
• the control element installed in connection with the housing element used for supporting the support element, controls the gas of the thermal treatment furnace, so that the gas can also flow underneath the material to be supported.
• the support element in order to prevent additional thermal load caused by gas flows on both sides of the support element, the support element is provided with a cooling agent lead- through, in which case there is obtained an essentially efficient heat transfer away from the support element.
• a flow-through type cooling agent circulation In heat transfer, there is advantageously used a flow-through type cooling agent circulation.
• flow-through type circulation means that the end where the cooling agent is discharged is different from the end where it is fed in.
• the flowing of the cooling agent in connection with the support element can include partial recirculation, in which case the passage of the cooling agent in some parts of the flow is opposite to the flow-through proper.
• the sealing elements of the support element are provided with a lead-through type circulation of the cooling agent, in which case also the housing element of the support apparatus can be protected against an excessive thermal load.
• the sealing element and the control element installed around the housing element are advantageously made of some ceramic material, whereas the intermediate support element provided in between the two control elements is advantageously made of metal.
• figure 1 is a side-view illustration of a preferred embodiment of the invention, seen in a partial cross-section
• figure 2 is an illustration of the embodiment of figure 1 , seen in the direction A - A
• figure 3 is an illustration of the embodiment of figure 1, seen in the direction B - B
• figure 4 is an illustration of the embodiment of figure 1, as installed at the orifice of an thermal treatment furnace.
• support rollers 4 meant for supporting the material 3 to be thermally treated.
• the support rollers 4 are installed symmetrically with respect to the housing element 1.
• the housing element 1 there are connected members (not illustrated) in order to rotate the housing element, so that the mutual position of the support rollers 4 with respect to the housing element 1 can be changed.
• the control element 5 is essen- tially symmetrical with respect to the housing element 1 , so that the control element 5 is thinnest at the housing element 1.
• the ends 7 of the control element 5 that deviate from the housing element 1 are designed so that the ends 7 form part of the circumference 9 of the same circle that also passes via the spot 10 of the support rollers 4 that is located farthest away from the housing elements 1.
• That section of the surface of the control element 5 that is located between the end 7 of the control element 5 and the housing element 1 also is advantageously curved in shape, in order to obtain an essentially unobstructed gas flow through the aperture formed between the support roller 4 and the control element 5.
• intermediate support elements 13 which in shape conform to the control elements, but in transversal area represent, when seen at the end of the housing element 1 , about 80% of the measures of the control element 5.
• sealing elements 11 which on hand seal the apparatus according to the invention to the thermal treatment furnace 6, and on the other hand serve as a circulation guide to the gases flowing out of the thermal treatment furnace.
• the sealing elements 11 are installed, with respect to the thermal treatment furnace 6, so that the sealing elements 11 constitute sealing with the vertical walls of the orifice of the thermal treatment furnace 11. Further, the sealing elements 11 are shaped so that the sealing elements 11 prevent the gases from flowing essentially underneath the support rollers 4 and past them to the external surroundings of the thermal treatment furnace 6 and the support arrangement 1.
• the housing element 1 , the control element 5, the sealing element 11 and the intermediate support element 13, as well as the support roller 4 serving as the support element are provided with a flow-through type cooling agent circulation 12 in order to achieve an essentially efficient cooling.

Landscapes

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

Priority Applications (8)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8555116

Family Applications (1)

Country Status (13)

Families Citing this family (1)

Citations (4)

Family Cites Families (2)

• 1999
  • 1999-08-04 FI FI991668A patent/FI107940B/fi active
• 2000
  • 2000-08-03 AT AT00951555T patent/ATE269422T1/de active
  • 2000-08-03 EP EP00951555A patent/EP1224337B1/en not_active Expired - Lifetime
  • 2000-08-03 ES ES00951555T patent/ES2222915T3/es not_active Expired - Lifetime
  • 2000-08-03 AU AU64452/00A patent/AU6445200A/en not_active Abandoned
  • 2000-08-03 BR BR0012930-5A patent/BR0012930A/pt not_active IP Right Cessation
  • 2000-08-03 DE DE60011656T patent/DE60011656T2/de not_active Expired - Lifetime
  • 2000-08-03 CA CA002381220A patent/CA2381220C/en not_active Expired - Lifetime
  • 2000-08-03 US US10/049,153 patent/US6802711B1/en not_active Expired - Lifetime
  • 2000-08-03 KR KR10-2002-7001476A patent/KR100525607B1/ko not_active Expired - Lifetime
  • 2000-08-03 JP JP2001515338A patent/JP4890709B2/ja not_active Expired - Lifetime
  • 2000-08-03 WO PCT/FI2000/000665 patent/WO2001011092A1/en not_active Ceased
• 2002
  • 2002-01-23 ZA ZA200200590A patent/ZA200200590B/en unknown

Patent Citations (4)

Non-Patent Citations (2)

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