EP3685931B1 - Procédé de traitement thermique d'isolation thermique mobile en ligne par laminage à chaud et ligne de traitement thermique - Google Patents

Procédé de traitement thermique d'isolation thermique mobile en ligne par laminage à chaud et ligne de traitement thermique Download PDF

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Publication number
EP3685931B1
EP3685931B1 EP18859703.3A EP18859703A EP3685931B1 EP 3685931 B1 EP3685931 B1 EP 3685931B1 EP 18859703 A EP18859703 A EP 18859703A EP 3685931 B1 EP3685931 B1 EP 3685931B1
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EP
European Patent Office
Prior art keywords
thermal insulation
heat treatment
hot
coil
rolling
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.)
Active
Application number
EP18859703.3A
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German (de)
English (en)
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EP3685931A4 (fr
EP3685931A1 (fr
Inventor
Yong Chen
Weilin Zhu
Ye Wang
Chunhe Zhao
Tao Song
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.)
Shanghai Heli Hydraulic Mechanical & Electrical Co Ltd
Baoshan Iron and Steel Co Ltd
Baosteel Zhanjiang Iron and Steel Co Ltd
Original Assignee
Shanghai Heli Hydraulic Mechanical & Electrical Co Ltd
Baoshan Iron and Steel Co Ltd
Baosteel Zhanjiang Iron and Steel Co Ltd
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Publication date
Priority claimed from CN201710853613.3A external-priority patent/CN107470377A/zh
Priority claimed from CN201810632237.XA external-priority patent/CN110616306A/zh
Priority claimed from CN201810632238.4A external-priority patent/CN110616307A/zh
Application filed by Shanghai Heli Hydraulic Mechanical & Electrical Co Ltd, Baoshan Iron and Steel Co Ltd, Baosteel Zhanjiang Iron and Steel Co Ltd filed Critical Shanghai Heli Hydraulic Mechanical & Electrical Co Ltd
Publication of EP3685931A1 publication Critical patent/EP3685931A1/fr
Publication of EP3685931A4 publication Critical patent/EP3685931A4/fr
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Publication of EP3685931B1 publication Critical patent/EP3685931B1/fr
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    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/84—Controlled slow cooling
    • 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
    • C21D11/00—Process control or regulation for heat treatments
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • 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
    • C21D9/52—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
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • 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
    • C21D9/663—Bell-type furnaces
    • C21D9/673—Details, accessories, or equipment peculiar to bell-type furnaces
    • 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
    • C21D9/663—Bell-type furnaces
    • C21D9/675—Arrangements of charging or discharging devices
    • 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
    • C21D9/663—Bell-type furnaces
    • C21D9/677—Arrangements of heating devices
    • 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
    • F27B11/00—Bell-type furnaces
    • 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/02—Ohmic resistance heating
    • 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
    • F27D19/00—Arrangements of controlling devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0057—Coiling the rolled product
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material

Definitions

  • the present invention relates to a hot-rolling and heat treatment process, particularly to a hot-rolling on-line thermal insulation heat treatment process and a heat treatment line.
  • hot coils are usually sent to a hot-rolled steel finishing warehouse to receive collective slow cooling with the aid of thermal insulation (using thermal insulation walls or thermal insulation pits, etc) or off-line heat treatment (using a roller hearth furnace or a bell furnace, etc.) to alleviate the influence.
  • thermal insulation using thermal insulation walls or thermal insulation pits, etc
  • off-line heat treatment using a roller hearth furnace or a bell furnace, etc.
  • the original process flow is: heating - rolling - laminar cooling - coiling - off-line heat treatment (in a thermal insulation pit or a heat treatment furnace, etc.).
  • CN 102 815 491 A discloses a "carrier roller-tray type metal strip coil transport device", wherein a transport chain tray is used to roll up and transport a steel coil after coiling.
  • This device comprises a fixed saddle just for transporting a steel coil. It cannot perform on-line thermal insulation of the steel coil during transportation.
  • CN 107 470 377 A discloses an "on-line thermal insulation slow cooling device" which only has thermal insulation effect. Due to incomplete sealing of its bottom structure, the thermal insulation effect is not good for steel coils.
  • JP 2010 094710 A discloses a "tunnel-type thermal insulation enclosure", wherein special thermal insulation pits and the like are added to the production line, which generally results in high cost. Moreover, it takes a long period of time to retrofit the production line, and thus normal production will be affected.
  • KR 1 589 913 B1 discloses a "mobile tunnel thermal insulation enclosure". Although movement and thermal insulation are achieved at the same time, the overall mobile equipment is contained in a thermal insulation chamber, and thus the service life of the equipment is shortened. Independent thermal insulation of individual objects and a perfect combination of a thermal insulation enclosure with a transport line cannot be achieved.
  • CN 101 413 051 B discloses a "deep processing system for hot-rolled strip steel", wherein a thermal insulation tunnel structure is used, but the overall mobile equipment is contained in a thermal insulation chamber, and thus the service life of the equipment is shortened.
  • An object of the present invention is to provide a hot-rolling on-line movable thermal insulation heat treatment process and a heat treatment line, wherein the coiling process temperature for a hot coil is effectively exploited to efficiently perform thermal insulation heat treatment on the hot coil at the earliest time.
  • the thermally insulated hot coil moves on-line along with a thermal insulation device to ensure meeting differentiated heat treatment process requirements. Not only product performances can be improved effectively, but also one-time investment is low. The needs of high-speed large-scale production can be satisfied, and energy can be saved.
  • the steel coil transport cart transports the steel coil to the tray, and then the thermal insulation device is placed on the tray to insulate the steel coil at the earliest time.
  • the thermal insulation enclosure and the steel coil move normally along the transport chain roller bed with no influence on the production operation of succeeding steel coils, while heat treatment is implemented during transportation.
  • Transport cart lateral transmission roller bed device this device transfers an unloaded transport cart device bearing no thermal insulation enclosure from a back-haul transport chain roller bed to the heat treatment transport chain roller bed to realize transmission of the transport cart device to ensure that the transport cart can continue to receive another hot-rolled steel coil coming from the coiling station.
  • the thermal insulation enclosure hoisting device lifts the thermal insulation enclosure from the transport cart device that carries the thermal insulation enclosure and moves on the back-haul transport chain roller bed, and then transfers the thermal insulation enclosure to the heat treatment transport chain roller bed to wait for next operation.
  • a thermal insulation enclosure up-transfer hoisting device automatically places the thermal insulation enclosure on the transport cart device to achieve thermal insulation of the hot-rolled steel coil after the coiling of the steel.
  • the transport cart device bearing a thermal insulation enclosure can satisfy the requirement of on-line heat treatment of a steel coil.
  • the transport cart device can move on the transport chain roller bed and transport the steel coil that has been hot rolled and coiled to the thermal insulation zone of the transport chain to accomplish heat treatment.
  • the thermal insulation enclosure and the transport cart device can be separated and combined by using a thermal insulation enclosure up-transfer hoisting device and a thermal insulation enclosure down-transfer hoisting device.
  • Single thermal insulation enclosure zone a steel coil is subjected to thermal insulation heat treatment in a transport cart device bearing a thermal insulation enclosure.
  • the purpose of heat treatment is achieved by controlling the running time of the transport cart device bearing a thermal insulation enclosure on the heat treatment transport chain roller bed.
  • the layout of the single thermal insulation enclosure zone needs to be coordinated with the transport cart devices bearing thermal insulation enclosures, with the number of hot-rolled steel coils to be insulated and the time of insulation being taken into account. Assuming that the number of thermal insulation enclosures for hot steel coils is n, the number of steel coil transport carts on the production line should be > n + 1. After a thermal insulation enclosure is separated from a transport cart device at the thermal insulation enclosure down-transfer hoisting device, the thermal insulation enclosure, together with the transport cart, returns to the up-transfer hoisting device along the back-haul transport chain roller bed.
  • special batches of hot-rolled strip steel can be subjected to special treatment such as in-depth processing when necessary, and heat treatment work stations can be added in the thermal insulation zone.
  • the heat treatment work station is provided with a heating system for heating the interior of the thermal insulation enclosure and a protective cooling gas input system.
  • a hot-rolled strip steel transport cart transports the hot-rolled steel coil to a work station where the heating system for heating the interior will heat the hot-rolled strip steel.
  • Relevant heat treatment curves and process requirements may be utilized to perform the secondary heating of the steel coil to improve the overall performances of the hot-rolled strip steel.
  • the transport cart device carrying a thermal insulation enclosure that has entered the processing work station is coupled to the protective cooling gas input system.
  • the requirement for controlling the internal temperature of the thermal insulation enclosure device may be fulfilled by controlling the volume and proportion of the protective gas that is input. Relevant heat treatment curves and process requirements may be utilized to perform the secondary heating of the steel coil to improve the overall performances of the hot-rolled strip steel.
  • the hot-rolled strip steel transport cart transports the hot-rolled strip steel to an information code printing station where the coil information will be printed on the steel coil. After it's confirmed that the steel coil separated from the thermal insulation enclosure carries the steel coil information, the steel coil is conveyed to the next production line for further processing.
  • the heat-treated steel coil is transported along the transport chain roller bed to a steel coil warehouse, or transported via the transport chain system to the next working procedure of the production line to continue the production.
  • the processing line is also provided with a heat treatment work station and an information code printing device.
  • a special batch of hot-rolled strip steel may need to be subjected to special treatment such as in-depth processing in the heat treatment work station.
  • a heat treatment work station may be added in the thermal insulation zone.
  • the heat treatment work station is provided with a heating system for heating the interior of the thermal insulation enclosure and a protective cooling gas input system.
  • Information code printing device a hot-rolled strip steel transport cart transports the hot-rolled strip steel to an information code printing station where the coil information will be printed on the steel coil.
  • Heat-treated steel coils may be transported along the transport chain roller bed to a steel coil warehouse. If a steel coil needs cold rolling, flattening or trimming, a transport cart rotating roller bed device is used to transfer the steel coil to a transport chain roller bed in the next working procedure.
  • thermal insulation enclosure exists individually and independently, and the temperature of each steel coil can be controlled during transportation on the transport chain. This saves time, and also improves production rhythm and efficiency.
  • the hot-rolling on-line movable thermal insulation heat treatment process realizes on-line movable heat treatment of a hot coil by using a thermal insulation device directly after coiling of the hot coil.
  • this process is used in place of the traditional off-line heat treatment, the purpose of improving product performances and plate shape quality, saving energy and reducing consumption can be achieved.
  • Thermal insulation heat treatment of hot-rolled and cold-rolled high-strength steel hot coils in an "on-line mode" avoids the influence of air cooling after coiling on the performances of the steel coils, and improves the performances of the hot-rolled and cold-rolled high-strength steel.
  • the present invention realizes on-line heat treatment during the transport chain transportation for a hot-rolled steel coil after coiling. After the steel coil leaves a coiler where the coiling is done, a movable hot coil thermal insulation heat treatment device is applied to the steel coil immediately. The heat of the steel coil itself is exploited to implement the heat treatment process including soaking and slow cooling of the steel coil to achieve the goals of high efficiency, energy saving and high yield rate.
  • the strip steel coil is subjected to thermal insulation treatment at the earliest time.
  • severe fluctuation of rolling force in cold rolling production, and failure to meet the tolerance standard for the thickness of final cold-rolled products are avoided.
  • the rolling stability of cold-rolling - pickling - continuous rolling mills is improved, and the yield rate of cold-rolled ultra-high-strength steel is increased.
  • a hot-rolling on-line movable thermal insulation heat treatment process is provided according to the present invention, wherein a slab is heated, rolled, laminar-flow cooled, and coiled to a hot coil state; after the hot coil is unloaded and bundled, a movable hot coil thermal insulation heat treatment device is applied to the hot coil within 30 minutes to start heat treatment on the hot coil while the hot coil is simultaneously transported on-line to a hot coil thermal insulation treatment zone; after heat treatment for a period of time of 1 to 48 hours, the steel coil is cooled in air and then sent to a warehouse, wherein a coiling temperature is controlled between 250 °C and 750 °C.
  • the movable hot coil thermal insulation heat treatment device is applied to the hot coil within 10 minutes after the coiling is completed.
  • the movable hot coil thermal insulation heat treatment device is a transport cart with a thermal insulation enclosure.
  • a natural cooling rate in the movable hot coil thermal insulation heat treatment device is from 1 to 10°C/h.
  • a heating system and/or a vacuuming system and/or an inert gas filling system are provided in the movable hot coil thermal insulation heat treatment device.
  • the thermal insulation heat treatment of hot-rolled and cold-rolled high-strength steel hot coils in an "on-line mode" avoids the influence of air cooling after coiling on the performances of the steel coils, and improves the performances of the hot-rolled and cold-rolled high-strength steel.
  • a hot-rolled strip steel heat treatment line wherein a heat treatment transport chain roller bed 30 is provided between a bundling device 20 downstream of a hot-rolled steel coiler 10 and a cold rolling set; at least one movable hot coil thermal insulation heat treatment device 40 is provided on the heat treatment transport chain roller bed 30; correspondingly, hoisting devices 50, 50' capable of loading and unloading a steel coil to the movable hot coil thermal insulation heat treatment device are positioned respectively at two ends of the heat treatment transport chain roller bed 30; and a thermal insulation enclosure for closed on-line thermal insulation of the hot-rolled steel coil is provided on the movable hot coil thermal insulation heat treatment device 40.
  • At least one heat treatment work station 80 is provided on the heat treatment transport chain roller bed 30 or the thermal insulation transport chain roller bed 70; a heating system for heating an interior of the thermal insulation enclosure in the movable hot coil thermal insulation heat treatment device and/or a protective cooling gas input system for gas cooling are provided in the heat treatment work station 80 represents a rotating roller bed.
  • a steel coil thermal insulation zone 60 is provided on one side of the heat treatment transport chain roller bed 30, wherein at least one thermal insulation transport chain roller bed 70 coupled to the heat treatment transport chain roller bed 30 and a hoisting device 50' are provided in the steel coil thermal insulation zone 60.
  • an information code printing device 90 for printing steel coil information on the steel coil is provided at one end of the heat treatment transport chain roller bed 30 facing the cold rolling set.
  • the movable hot coil thermal insulation heat treatment device 40 comprises:
  • it further comprises a gas protection device and gas sensors 8, 8' which are electrically coupled to the information acquisition control module 7, respectively.
  • a signal emitting module is provided in the information acquisition control module 7.
  • the steel coil fixture 2 comprises two juxtaposed support bodies 21, 22, wherein upper end faces of the two support bodies 21, 22 are inclined surfaces and are arranged symmetrically; and side sealing devices 9, 9' are arranged at a gap between the two support bodies 21, 22 at two sides of the two support bodies 21, 22.
  • a bottom sealing device 11 is arranged between bottoms of the two support bodies 21, 22 of the steel coil fixture 2 to close the gap between the bottoms of the two support bodies 21, 22.
  • the bottom sealing device 11 comprises:
  • the sealing plate 113 has a composite layered structure, wherein an intermediate part of the structure is consisting of an insulating felt, and two side parts are high temperature resistant steel plates.
  • an electromagnetic block 114 is provided on an end face of the support plate 111, and correspondingly, a metal stopper matching the electromagnetic block 114 is provided between end portions of the two support bodies 21, 22 of the steel coil fixture 2 at one side.
  • the side sealing device 9 (which is taken as an example; the same below) comprises:
  • the bearing pedestal 943 is provided on one side of the support body 21 by using a fixing plate 945, wherein one side of the fixing plate 945 is provided with a through hole 9451 for the rack 941 to pass through, and a roller 946 abutted against a top surface of the rack 941 is provided at an outer side of the fixing plate 945 above the through hole 9451.
  • the sealing member 93 has a composite layered structure, wherein an intermediate part of the structure is an insulating material, and two sides of the intermediate part are cladded with a high temperature resistant steel plate.
  • the sealing member 93 is a right angle plate structure.
  • a positioning sleeve 12 is provided on a lower part of a side of the thermal insulation enclosure 4.
  • a positioning pin 13 matching the positioning sleeve 12 is provided on the tray 3 for the thermal insulation enclosure.
  • the positioning pin 13 is preferably a cone-shaped body.
  • the thermal insulation enclosure 4 is provided with a ventilation hole and a corresponding exhaust valve 41.
  • the thermal insulation enclosure 4 has a composite structure, comprising: an outer protection layer, which is a high-strength steel plate; an intermediate layer, which is a thermal insulation material; and an inner layer, which is a high temperature resistant stainless steel plate.
  • the thermal insulation enclosure 4 is a composite structure, comprising an inner radiation layer 42, an electric heating wire layer 43, an intermediate mesh cover 44, an intermediate thermal insulation layer 45, and an outer protection layer 46 in order from inside to outside.
  • the composite structure of the thermal insulation enclosure is fixed with an anchor nail 47.
  • the thermal insulation enclosure 4 is a square thermal insulation enclosure or a circular thermal insulation enclosure.
  • the electric heating device 5 is an electric heating wire
  • the temperature sensor 6 is a thermocouple sensor
  • the thermal insulation treatment of a strip steel coil after coiling according to the present invention also fulfils the purpose of annealing treatment by making use of the residual heat in the steel coil that has just been coiled, which greatly addresses the challenges of insufficient performance improvement caused by the excessively long time from coiling to entry of the steel coil to the slow cooling device, and large performance fluctuation of the strip steel in the length and width directions.
  • a special batch of hot-rolled strip steel may need to be subjected to special treatment such as in-depth processing.
  • the heating device and protective cooling gas input system provided in the thermal insulation enclosure can cooperate to achieve temperature control under necessary conditions.

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  • 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)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Claims (19)

  1. Procédé de traitement thermique et isolation thermique mobile en ligne de laminage à chaud, dans lequel une dalle est chauffée, laminée, refroidie par écoulement laminaire, et enroulée dans un état d'enroulement chaud ; après que l'enroulement chaud est déchargé et regroupé, un dispositif de traitement thermique et isolation thermique d'enroulement chaud mobile (40) est appliqué à l'enroulement chaud dans les 30 minutes pour démarrer un traitement thermique sur l'enroulement chaud alors que l'enroulement chaud est simultanément transporté en ligne vers une zone de traitement d'isolation thermique d'enroulement chaud ; après traitement thermique sur une durée de 1 à 48 heures, l'enroulement d'acier est refroidi dans l'air et ensuite envoyé vers un dépôt, dans lequel une température d'enroulement est contrôlée entre 250°C et 750°C, dans lequel le dispositif de traitement thermique et isolation thermique d'enroulement chaud mobile (40) comprend de plus :
    une plaque de base (1),
    une fixation d'enroulement d'acier (2) fournie sur une portion centrale d'une surface d'extrémité supérieure de la plaque de base (1) et
    comprenant deux corps de support juxtaposés (21, 22), dans lequel des faces d'extrémité supérieures des deux corps de support (21, 22) sont des surfaces inclinées et sont disposées symétriquement, dans lequel un dispositif de scellement latéral (9, 9') est disposé sur un espace sur chacun des deux côtés des deux corps de support (21, 22), et dans lequel un dispositif de scellement de fond (11) est disposé entre les fonds des deux corps de support (21, 22) de la fixation d'enroulement d'acier (2) pour fermer l'espace entre les fonds des deux corps de support (21, 22),
    le dispositif de scellement de fond comprenant (11) :
    une plaque de support (111) fournie entre les deux corps de support (21, 22) de la fixation d'enroulement d'acier (2), dans lequel la plaque de support (111) est disposée verticalement, et plusieurs rouleaux (112) sont fournis sur des parties inférieures de deux côtés de la plaque de support (111) à espacements réguliers dans une direction de longueur pour former un mécanisme coulissable, et
    une plaque de scellement (113) fournie horizontalement sur une surface supérieure de la plaque de support (111), dans lequel la plaque de scellement (113) présente une dimension correspondant à l'espace entre les fonds des deux corps de support (21, 22),
    le dispositif de scellement latéral (9) comprenant :
    deux plaques de base fixes (91, 91') chacune fournie horizontalement sur un fond de l'espace sur un côté extérieur des deux corps de support (21, 22) de la fixation d'enroulement d'acier (2), dans lequel plusieurs rouleaux de guidage (92, 92') espacés dans une direction axiale sont fournis sur une surface latérale extérieure de chacune des plaques de base fixes (91, 91'),
    deux éléments de scellement (93, 92'), chacun disposé sur l'espace sur un des deux côtés des deux corps de support (21, 22) de la fixation d'enroulement d'acier (2), dans lequel une extrémité de fond de l'élément de scellement (93, 93') est fournie en pouvant coulisser sur les rouleaux de guidage (92, 92') de la plaque de base fixe (91, 91'), et
    un mécanisme de commande (94) comprenant de plus deux crémaillères (941), chacune fournie horizontalement sur un des deux éléments de scellement (93, 93') avec une extrémité de la crémaillère (941) étant couplée à l'élément de scellement (93, 93'), et un arbre de commande (942), disposé horizontalement sur un côté du corps de support (21, 22) opposé à l'espace à travers deux supports de palier (943), deux engrenages (944), chacun fourni à une des deux extrémités de l'arbre de commande (942), dans lequel l'engrenage (944) forme un maillage avec la crémaillère (941),
    un plateau (3) qui est une structure annulaire et disposé horizontalement par imbrication sur une partie milieu de la fixation d'enroulement d'acier (2),
    une enceinte d'isolation thermique (4), qui présente une extrémité inférieure ouverte et une chambre interne ayant un volume supérieur à un enroulement d'acier (100), dans lequel l'enceinte d'isolation thermique (4) est disposée sur le plateau (3),
    un dispositif de chauffage électrique (5) fourni sur une paroi latérale interne de l'enceinte d'isolation thermique (4),
    un capteur de température (6) fourni dans l'enceinte d'isolation thermique (4), et un module de contrôle d'acquisition d'information (7),
    dans lequel le dispositif de chauffage électrique (5) et le capteur de température (6) sont électriquement couplés au module de contrôle d'acquisition d'information (7).
  2. Procédé de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon la revendication 1, dans lequel le dispositif de traitement thermique et isolation thermique d'enroulement chaud mobile (40) est appliqué à l'enroulement chaud dans les 10 minutes après que l'enroulement est achevé.
  3. Procédé de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon la revendication 1 ou 2, dans lequel le dispositif de traitement thermique et isolation thermique d'enroulement chaud mobile (40) est un chariot de transport avec une enceinte d'isolation thermique (4).
  4. Procédé de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 1 à 3, dans lequel une vitesse de refroidissement naturel dans le dispositif de traitement thermique et isolation thermique d'enroulement chaud mobile (40) est de 1 à 10°C/h.
  5. Procédé de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 1 à 4, dans lequel un système de chauffage et/ou un système de mise sous vide et/ou un système de remplissage de gaz inerte sont fournis dans le dispositif de traitement thermique et isolation thermique d'enroulement chaud mobile (40).
  6. Procédé de traitement thermique et isolation thermique mobile en ligne de laminage à chaud, comprenant :
    un banc de rouleau à chaîne de transport de traitement thermique (30) fourni entre un dispositif de regroupement (20) en aval d'un enrouleur d'acier laminé à chaud (10) et un ensemble de laminage à froid ;
    au moins un dispositif de traitement thermique et isolation thermique d'enroulement chaud mobile (40) positionné sur le banc de rouleau à chaîne de transport de traitement thermique (30), le au moins un dispositif de traitement thermique et isolation thermique d'enroulement chaud mobile (40) comprenant de plus :
    une plaque de base (1),
    une fixation d'enroulement d'acier (2) fournie sur une portion centrale d'une surface d'extrémité supérieure de la plaque de base (1) et comprenant deux corps de support juxtaposés (21, 22), dans lequel des faces d'extrémité supérieure des deux corps de support (21, 22) sont des surfaces inclinées et sont disposées symétriquement, dans lequel un dispositif de scellement latéral (9, 9') est disposé sur un espace sur chacun des deux côtés des deux corps de support (21, 22), et dans lequel un dispositif de scellement de fond (11) est disposé entre des fonds des deux corps de support (21, 22) de la fixation d'enroulement d'acier (2) pour fermer l'espace entre les fonds des deux corps de support (21, 22),
    le dispositif de scellement de fond (11) comprenant :
    une plaque de support (111) fournie entre les deux corps de support (21, 22) de la fixation d'enroulement d'acier (2), dans lequel la plaque de support (111) est disposée verticalement, et plusieurs rouleaux (112) sont fournis sur des parties inférieures de deux côtés de la plaque de support (111) avec des espacements réguliers dans une direction de longueur pour former un mécanisme coulissable, et
    une plaque de scellement (113) fournie horizontalement sur une surface supérieure de la plaque de support (111), dans lequel la plaque de scellement (113) présente une dimension correspondant à l'espace entre les fonds des deux corps de support (21, 22),
    le dispositif de scellement latéral (9) comprenant :
    deux plaques de base fixes (91, 91') chacune fournie horizontalement sur un fond de l'espace sur un côté extérieur des deux corps de support (21, 22) de la fixation d'enroulement d'acier (2), dans lequel plusieurs rouleaux de guidage (92, 92') espacés dans une direction axiale sont fournis sur une surface latérale extérieure de chacune des plaques de base fixes (91, 91'),
    deux éléments de scellement (93, 92'), chacun disposé sur l'espace sur un des deux côtés des deux corps de support (21, 22) de la fixation d'enroulement d'acier (2), dans lequel une extrémité de fond de l'élément de scellement (93, 93') est fournie en pouvant coulisser sur les rouleaux de guidage (92, 92') de la plaque de base fixe (91, 91'), et
    un mécanisme de commande (94) comprenant de plus deux crémaillères (941), chacune fournie horizontalement sur un des deux côtés de scellement (93, 93') avec une extrémité de la crémaillère (941) étant couplée à l'élément de scellement (93, 93'), et un arbre de commande (942), disposé horizontalement sur un côté du corps de support (21, 22) opposé à l'espace à travers deux paliers de support (943), deux engrenages (944), chacun fourni à une des deux extrémités de l'arbre de commande (942), dans lequel l'engrenage (944) forme un maillage avec la crémaillère (941),
    un plateau (3) qui est une structure annulaire et disposé horizontalement par imbrication d'une partie milieu de la fixation d'enroulement d'acier (2),
    une enceinte d'isolation thermique (4), qui présente une extrémité inférieure ouverte et une chambre interne ayant un volume supérieur à un enroulement d'acier (100), dans lequel l'enceinte d'isolation thermique (4) est disposée sur le plateau (3),
    un dispositif de chauffage électrique fourni sur une paroi latérale interne de l'enceinte d'isolation thermique,
    un capteur de température fourni dans l'enceinte d'isolation thermique, et un module de contrôle d'acquisition d'information, dans lequel le dispositif de chauffage électrique et le capteur de température sont électriquement couplés au module de contrôle d'acquisition d'information ;
    de manière correspondante, un dispositif de levage (50, 50') capable de charger et décharger l'enroulement d'acier (100) jusqu'au dispositif de traitement thermique et isolation thermique d'enroulement chaud mobile (40) positionné à chaque extrémité du banc de rouleau à chaîne de transport de traitement thermique (30).
  7. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon la revendication 6, dans laquelle une zone d'isolation thermique d'enroulement d'acier (60) est fournie sur un côté du banc de rouleau à chaîne de transport de traitement thermique (30), et au moins un banc de rouleau à chaîne de transport d'isolation thermique (70) couplé au banc de rouleau à chaîne de transport de traitement thermique (30) est fourni dans la zone d'isolation thermique d'enroulement d'acier (60).
  8. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon la revendication 6 ou 7, dans laquelle au moins une station de travail de traitement thermique (80) est fournie sur le banc de rouleau à chaîne de transport de traitement thermique (30) ou le banc de rouleau à chaîne de transport d'isolation thermique (70), et un système de chauffage pour chauffer un intérieur de l'enceinte d'isolation thermique (4) dans le dispositif de traitement thermique et isolation thermique d'enroulement chaud mobile (40) et/ou un système d'entrée de gaz de refroidissement protecteur pour un refroidissement au gaz est/sont fourni/s dans la station de travail de traitement thermique (80).
  9. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 6 à 8, dans laquelle un dispositif d'impression de code d'information (90) pour l'impression d'information d'enroulement d'acier sur l'enroulement d'acier (100) est fourni à une extrémité du banc de rouleau à chaîne de transport de traitement thermique (30) faisant face à l'ensemble de laminage à froid.
  10. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 6 à 9, dans laquelle le dispositif de traitement thermique et isolation thermique d'enroulement chaud mobile (40) comprend de plus un dispositif de protection de gaz et un capteur de gaz (8, 8') qui sont électriquement couplés au module de contrôle d'acquisition d'information (7), respectivement.
  11. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 6 à 10, dans laquelle un module d'émission de signal est fourni dans le module de contrôle d'acquisition d'information (7).
  12. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 6 à 11, dans laquelle un bloc électromagnétique (114) est fourni sur une face d'extrémité de la plaque de support (111), et de manière correspondante, un butoir en métal s'adaptant au bloc électromagnétique (114) est fourni entre des portions d'extrémité des deux corps de support (21, 22) de la fixation d'enroulement d'acier (2) sur un côté.
  13. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 6 à 12, dans laquelle le palier de support (943) est fourni sur un côté du corps de support (21, 22) en utilisant une plaque de fixation (945), dans laquelle un côté de la plaque de fixation (945) est muni d'une perforation (9451) pour que la crémaillère (941) la traverse, et un rouleau (946) butant contre une surface supérieure de la crémaillère (941) est fourni sur un côté extérieur de la plaque de fixation (945) au-dessus de la perforation (9451).
  14. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 6 à 13, dans laquelle la plaque de scellement (113) et l'élément de scellement (93, 93') présentent une structure en couches composite, dans laquelle une partie intermédiaire de la structure est un feutre d'isolation, et deux côtés de la partie intermédiaire sont revêtus avec une plaque d'acier résistant aux températures élevées.
  15. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 6 à 14, dans laquelle un manchon de positionnement (12) est fourni sur une partie inférieure d'un côté de l'enceinte d'isolation thermique (4) ; de manière correspondante, une pointe de positionnement (13) s'adaptant au manchon de positionnement (12) est fournie sur le plateau (3) pour l'enceinte d'isolation thermique (4) ; la pointe de positionnement (13) est de préférence un corps en forme de cône.
  16. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 6 à 15, dans laquelle l'enceinte d'isolation thermique (4) est munie d'un trou de ventilation et d'une vanne d'échappement correspondante (41).
  17. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 6 à 16, dans laquelle l'enceinte d'isolation thermique (4) présente une structure composite, comprenant : une couche de protection extérieure, laquelle est une plaque d'acier de résistance élevée ; une couche intermédiaire, laquelle est un matériau d'isolation thermique ; et une couche interne, laquelle est une plaque d'acier inoxydable résistant aux températures élevées.
  18. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 6 à 17, dans laquelle l'enceinte d'isolation thermique (4) est une structure composite, comprenant une couche de rayonnement interne (42), une couche de fil de chauffage électrique (43), une couverture de maillage intermédiaire (44), une couche d'isolation thermique intermédiaire (45), et une couche de protection extérieure (46) dans l'ordre allant de l'intérieur vers l'extérieur.
  19. Ligne de traitement thermique et isolation thermique mobile en ligne de laminage à chaud selon l'une quelconque des revendications 6 à 18, dans laquelle le dispositif de chauffage électrique (5) est un fil de chauffage électrique, et le capteur de température (6) est un capteur de thermocouple.
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CN201710853613.3A CN107470377A (zh) 2017-09-20 2017-09-20 钢带制造流水线在线保温缓冷装置
CN201810632237.XA CN110616306A (zh) 2018-06-19 2018-06-19 一种热轧在线移动保温热处理工艺
CN201810632238.4A CN110616307A (zh) 2018-06-19 2018-06-19 一种热轧带钢热处理线
PCT/CN2018/106709 WO2019057116A1 (fr) 2017-09-20 2018-09-20 Procédé de traitement thermique d'isolation thermique mobile en ligne par laminage à chaud et ligne de traitement thermique

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CN107470377A (zh) * 2017-09-20 2017-12-15 上海贺力液压机电有限公司 钢带制造流水线在线保温缓冷装置

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