CN118284709A - Method for heating metal product - Google Patents
Method for heating metal product Download PDFInfo
- Publication number
- CN118284709A CN118284709A CN202280077417.0A CN202280077417A CN118284709A CN 118284709 A CN118284709 A CN 118284709A CN 202280077417 A CN202280077417 A CN 202280077417A CN 118284709 A CN118284709 A CN 118284709A
- Authority
- CN
- China
- Prior art keywords
- finished product
- steel
- temperature
- steel semi
- fluidized bed
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002184 metal Substances 0.000 title description 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 82
- 239000010959 steel Substances 0.000 claims abstract description 82
- 239000011265 semifinished product Substances 0.000 claims abstract description 81
- 239000002245 particle Substances 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000005098 hot rolling Methods 0.000 claims description 5
- 230000005587 bubbling Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 21
- 239000012530 fluid Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/53—Heating in fluidised beds
-
- 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
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention relates to a method for heating a steel semi-finished product, comprising: a preheating step carried out in a preheating device comprising a chamber containing solid particles, a heat exchanger, a support capable of supporting said steel semifinished product, a gas injector; and a heating step performed in the furnace, wherein the preheating step includes the steps of: i. injecting a gas into the first chamber so as to form a first fluidized bed, ii. Heating the fluidized bed by means of the heat exchanger, iii. Placing the steel semi-finished product into the fluidized bed and onto the support such that the fluidized bed is capable of transferring heat to the steel semi-finished product, iv. Taking out the steel semi-finished product when the temperature of the steel semi-finished product is 200 ℃ to 1000 ℃, and the heating step comprises the step of heating the semi-finished product to a temperature of 1100 ℃ to 1400 ℃.
Description
Technical Field
The invention relates to a method for heating a steel semi-finished product.
Background
In steel production, but more generally in metal production, the steel product needs to be reheated before undergoing a forming process or heat treatment. This is the case for example of billets or compacts prior to hot rolling, which are typically reheated in a furnace from room temperature to a temperature above 1000 ℃.
However, this reheating consumes a large amount of energy, resulting in emission of greenhouse gases. Therefore, it is desirable to develop a heating method of the semi-finished product that reduces the influence of the process on the environment.
Disclosure of Invention
The object of the present invention is to provide such a heating method.
This object is achieved by providing a method according to any one of claims 1 to 10.
Other features and advantages will become apparent from the following description of the invention.
The invention relates to a method for heating a steel semifinished product 2 as a slab, blank or block, comprising:
A preheating step carried out in a preheating device comprising a chamber 3 containing solid particles 4, a heat exchanger 5, a support 6 able to support said steel semi-finished product, a gas injector 7, and
A heating step performed in a furnace, in which the steel semifinished product is heated to a temperature of 1000 to 1400 ℃,
A hot rolling step, subsequent to the heating step, in which the steel semifinished product is hot rolled,
Wherein,
The preheating step comprises the following steps:
i. a gas 12 is injected into said first chamber 3 so as to form a first fluid bed 8,
Heating the fluidized bed 8 by means of the heat exchanger 5,
Placing the steel semi-finished product 2 into the fluidized bed 8 such that the steel semi-finished product 2 is supported by the support 6, and such that the fluidized bed 8 is capable of transferring heat to the steel semi-finished product 2,
When the temperature of the steel semi-finished product 2 is 200 ℃ to 1000 ℃, taking out the steel semi-finished product 2,
And the heating step comprises the step of heating the steel semi-finished product to a temperature of 1100 ℃ to 1400 ℃.
Drawings
Fig. 1 illustrates an embodiment of an apparatus in which the claimed method may be performed.
Fig. 2 illustrates an embodiment of a plurality of preheating devices, in which preheating is performed by at least two preheating devices.
Detailed Description
Preferably, the steel semi-finished product as a slab or blank or block will be laminated.
The device comprises a chamber 3 containing solid particles 4, a heat exchanger 5, a support capable of supporting a steel semi-finished product 6 and a gas injector 7. The chamber is preferably capable of receiving more than one steel blank. The support 6 is preferably able to receive more than one steel semi-finished product. The support may be a basket. Preferably, in step iii, the steel semifinished product is located on said support.
The steel semi-finished product may be transported to the inside and outside of the chamber by a rolling conveyor or may be placed inside the chamber by a pick-up device such as a crane or any suitable pick-up device. For example, the system disclosed in WO 2021 064 451 may be used as a pick-up device. Even more preferably, said support is not used to move said semifinished product inside or outside the chamber 3. Separating the support system from the transport system, for example the pick-up device, allows to reduce the number of transport systems in case several steel semi-finished products are preheated simultaneously.
The chamber may be a closed chamber with a closable opening through which the steel semi-finished product may be transported, but the chamber may also have an open roof or any configuration suitable for transportation of steel semi-finished products.
In step i. of the preheating step, a gas is injected into the chamber 3 so as to form a fluidized bed 8. The injection is accomplished by means of a gas injector 7.
Preferably, the gas sprayed in the chamber is heated. Even more preferably, the gas has a temperature of 200 ℃ to 1000 ℃. This allows to reduce the energy required to heat the fluidized bed in the preferred temperature range. Even more preferably, the gas is at least partially heated by renewable energy and/or recovered waste heat. The recovered waste heat may for example be from recycled fumes.
Even more preferably, the gas injected in the chamber is heated by means of heating means partly or wholly powered by the CO 2 neutralization electricity.
CO 2 the neutralizing power consists mainly of power from renewable sources, defined as energy sources collected from renewable sources that are naturally supplemental on a human time scale, including sources like sunlight, wind, rain, tides, waves, geothermal, and the like. In some embodiments, power from a nuclear source may be used because the nuclear source does not emit CO 2 that would be produced.
Preferably, the solid particles of the fluidized bed are in a bubbling state. The gas velocity to be applied to obtain the bubbling state depends on several parameters, such as the kind of gas used, the size and density of the particles or the size of the chamber, which are easily managed by a person skilled in the art.
In step ii, the fluidized bed is heated by means of a heat exchanger. The heat exchanger 5 is capable of transferring heat to said fluidized bed 8. An inlet pipe 9 is connected to the heat exchanger such that a transfer medium can be introduced into the heat exchanger through the inlet pipe 9. An outlet pipe 11 is connected to the heat exchanger such that the transfer medium can be discharged from the heat exchanger through the outlet pipe 11. The walls of the chamber 3 may house a heat exchanger.
Preferably, in step ii, the fluidized bed is heated at a temperature of 400 ℃ to 700 ℃, preferably at a temperature of 500 ℃ to 700 ℃ and even more preferably at a temperature of 600 ℃ to 700 ℃.
Preferably, the transfer medium circulates in the heat exchanger and is introduced into the heat exchanger at a temperature of 250 ℃ to 1500 ℃.
Preferably, the transfer medium is at least partially heated by a renewable energy source.
Preferably, the transfer medium circulates in the heat exchanger and leaves the heat exchanger at a temperature of 150 ℃ to 1000 ℃.
Even more preferably, the gas is at least partially heated by renewable energy and/or recovered waste heat. The recovered waste heat may for example be from recycled fumes.
Step ii. Simultaneous with step i. So that as the solid particles form a fluidized bed they are heated.
In step iii, the steel semifinished product is placed inside the fluidized bed so that the steel semifinished product can be heated by the fluidized bed. Thus, step i. And step ii. Are performed during step iii. To allow heat transfer from the heat exchanger to the fluidized bed and also from the heat exchanger to the steel semi-finished product.
Preferably, the steel semi-finished product is at ambient temperature before being brought into the fluidized bed.
Preferably, the entire steel semifinished product is located inside said fluidized bed.
In step iv, when the steel semi-finished product reaches a determined temperature, the steel semi-finished product is removed from the fluidized bed.
Preferably, the steel semi-finished product is taken out when the temperature of the steel semi-finished product is 500 ℃ to 700 ℃. Even more preferably, the steel semi-finished product is taken out when the temperature of the steel semi-finished product is 600 ℃ to 700 ℃.
In the heating step, the steel semifinished product is heated in a furnace to a temperature of 1100 to 1400 ℃. Such a heating range allows hot rolling to be performed.
Preferably, the method comprises a hot rolling step after the heating step, in which the steel semifinished product is hot rolled.
PREFERRED EMBODIMENTS FOR CARRYING OUT THE INVENTION
Preferably, the gas sprayed in the chamber is air. Alternatively, the gas injected by the gas injector is preferably an inert gas such as argon or helium, or nitrogen or a gas mixture.
Preferably, the gas is injected in the chamber at a temperature close to or higher than the temperature of one of the fluidised beds.
Preferably, the gas is injected at a velocity of 1cm.s -1 to 30cm.s -1. Such a speed range requires low ventilation power and thus reduced energy consumption.
Preferably, the solid particles have a size of 40 μm to 500 μm.
Preferably, the solid particles have a heat capacity of 500j.kg -1.K-1 to 2000j.kg -1.K-1.
Preferably, the solid particles have a bulk density of 1400kg.m -3 to 4000kg.m -3.
Preferably, the solid particles are ceramic particles. Preferably, the solid particles are made of glass or any other solid material that is chemically stable below 1000 ℃. For example, the solid particles may be made of SiC, olivine, steel slag or alumina.
Preferably, the solid particles are inert. This avoids any reaction with the steel semi-finished product.
The method according to the invention allows heating at least part of the steel semi-finished product in a preheating step by means of renewable energy sources and/or recovered waste energy.
Alternatively, as illustrated in fig. 2, the preheating step is performed by at least two preheating devices 1, 100.
The at least two preheating devices are arranged such that the outlet pipe 11 of the first preheating device 1 is connected to the inlet pipe 90 of the second preheating device 100.
In this case, the preheating step includes the steps of:
i. The gas 12, 120 is injected into the chamber 3 of the first preheating means and the chamber 30 of the second preheating means so as to form the fluidized bed 4, 40,
Heating the fluidized bed 4, 40 by means of a heat exchanger 5, 50,
Placing the steel semi-finished product 2 in a fluid bed 80 of the second preheating device 100 and onto the support 60, so that the fluid bed 80 is able to transfer heat to the steel semi-finished product 2,
When the temperature of the steel semi-finished product 2 is 300 ℃ to 500 ℃, taking out the steel semi-finished product 2,
Placing the steel semi-finished product 2 in a fluidized bed 8 of the second preheating device 1 and onto the support 6, so that the fluidized bed 8 is able to transfer heat to the steel semi-finished product 2,
And taking out the steel semi-finished product 2 when the temperature of the steel semi-finished product 2 is 500-700 ℃.
This preheating step allows the steel semifinished product to be heated in several steps in order to increase the efficiency of the transfer medium passing through the heat exchanger.
The invention also relates to a method for heating a steel semi-finished product 2, comprising:
A preheating step carried out in a preheating device 1, the preheating device 1 comprising a chamber 3 containing solid particles 4, a heat exchanger 5, a support 6 capable of supporting said steel semifinished product, a gas injector 7, and
A rolling step performed in a rolling mill, wherein,
The preheating step comprises the following steps:
i. a gas 12 is injected into said first chamber 3 so as to form a first fluid bed 8,
Heating the fluidized bed 8 by means of the heat exchanger 5,
Placing the steel semi-finished product 2 into the fluidized bed 8 such that the steel semi-finished product 2 is supported by the support 6, and such that the fluidized bed 8 is capable of transferring heat to the steel semi-finished product 2,
Taking out the steel semifinished product 2 when the temperature of the steel semifinished product 2 is 150 ℃ to 350 ℃, and
The rolling step comprises the step of rolling the steel semifinished product at a temperature of 150 ℃ to 300 ℃.
Claims (9)
1. A method for heating a steel semi-finished product (2) as a slab, blank or block, the method comprising:
-a preheating step performed in a preheating device (1), said preheating device (1) comprising a chamber (3) containing solid particles (4), a heat exchanger (5), a support (6) capable of supporting said steel semifinished product, a gas injector (7), and
A heating step performed in a furnace, in which the steel semifinished product is heated to a temperature of 1000 to 1400 ℃,
A hot rolling step, subsequent to the heating step, in which the steel semifinished product is hot rolled,
Wherein,
The preheating step comprises the following steps:
i. Injecting a gas (12) into said first chamber (3) so as to form a first fluidised bed (8),
Heating the fluidized bed (8) by means of the heat exchanger (5),
Placing the steel semi-finished product (2) into the fluidized bed (8) such that the steel semi-finished product (2) is supported by the support (6) and such that the fluidized bed (8) is capable of transferring heat to the steel semi-finished product (2),
And taking out the steel semi-finished product (2) when the temperature of the steel semi-finished product (2) is 200-1000 ℃.
2. The method of claim 1, wherein the gas injected into the chamber is air.
3. The method of claim 1 or 2, wherein the solid particles of the fluidized bed are in a bubbling state.
4. A process according to any one of claims 1 to 3, wherein in step ii, the fluidised bed is heated at a temperature of 400 to 700 ℃, preferably at a temperature of 500 to 700 ℃, and even more preferably at a temperature of 600 to 700 ℃.
5. The method according to any one of claims 1 to 4, wherein the steel semi-finished product is taken out when the temperature of the steel semi-finished product is 500 ℃ to 700 ℃.
6. The method according to claim 5, wherein the steel semi-finished product is taken out when the temperature of the steel semi-finished product is 600 ℃ to 700 ℃.
7. The method according to any one of claims 1 to 6, wherein a transfer medium is circulated in the heat exchanger and introduced into the heat exchanger at a temperature of 250 ℃ to 1500 ℃.
8. The method of any one of claims 1 to 7, wherein a transfer medium circulates in the heat exchanger and exits the heat exchanger at a temperature of 150 ℃ to 1000 ℃.
9. A method for heating a steel semi-finished product (2) as a slab, blank or block, the method comprising:
-a heating step performed in a preheating device (1), said preheating device (1) comprising a chamber (3) containing solid particles (4), a heat exchanger (5), a support (6) capable of supporting said steel semi-finished product, a gas injector (7), and
A rolling step carried out in a rolling mill,
Wherein the heating step comprises the steps of:
i. Injecting a gas (12) into said first chamber (3) so as to form a first fluidised bed (8),
Heating the fluidized bed (8) by means of the heat exchanger (5),
Placing the steel semi-finished product (2) into the fluidized bed (8) such that the steel semi-finished product (2) is supported by the support (6) and such that the fluidized bed (8) is capable of transferring heat to the steel semi-finished product (2),
Taking out the steel semifinished product (2) when the temperature of the steel semifinished product (2) is 150 ℃ to 350 ℃, and
The rolling step comprises the step of rolling the steel semifinished product at a temperature of 150 ℃ to 300 ℃.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IBPCT/IB2021/061689 | 2021-12-14 | ||
| PCT/IB2021/061689 WO2023111633A1 (en) | 2021-12-14 | 2021-12-14 | Heating method of a metallic product |
| PCT/IB2022/061704 WO2023111760A1 (en) | 2021-12-14 | 2022-12-02 | Heating method of a metallic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118284709A true CN118284709A (en) | 2024-07-02 |
Family
ID=79287968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280077417.0A Pending CN118284709A (en) | 2021-12-14 | 2022-12-02 | Method for heating metal product |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20240090725A (en) |
| CN (1) | CN118284709A (en) |
| CA (1) | CA3237553A1 (en) |
| WO (2) | WO2023111633A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6532905B2 (en) * | 2001-07-17 | 2003-03-18 | The Babcock & Wilcox Company | CFB with controllable in-bed heat exchanger |
| DE102010027179B3 (en) * | 2010-07-14 | 2011-11-10 | Benteler Automobiltechnik Gmbh | Production of automotive components e.g. structural/body parts of a car, comprises heating metal part in fluidized bed and subjecting metal part to forming, hardening or aging process, and forming metal part in warm state |
| WO2020012221A1 (en) * | 2018-07-11 | 2020-01-16 | Arcelormittal | Method of heat transfer and associated device |
| WO2020012222A1 (en) * | 2018-07-11 | 2020-01-16 | Arcelormittal | Method to control the cooling of a metal product |
| CA3149352A1 (en) | 2019-10-02 | 2021-04-08 | Arcelormittal | System and method for handling semi-finished metal products |
-
2021
- 2021-12-14 WO PCT/IB2021/061689 patent/WO2023111633A1/en unknown
-
2022
- 2022-12-02 WO PCT/IB2022/061704 patent/WO2023111760A1/en unknown
- 2022-12-02 KR KR1020247016912A patent/KR20240090725A/en unknown
- 2022-12-02 CN CN202280077417.0A patent/CN118284709A/en active Pending
- 2022-12-02 CA CA3237553A patent/CA3237553A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023111760A1 (en) | 2023-06-22 |
| CA3237553A1 (en) | 2023-06-22 |
| KR20240090725A (en) | 2024-06-21 |
| WO2023111633A1 (en) | 2023-06-22 |
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| Date | Code | Title | Description |
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| PB01 | Publication |