CN110270597B - Blank heating method in rolling production process - Google Patents
Blank heating method in rolling production process Download PDFInfo
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- CN110270597B CN110270597B CN201910478340.8A CN201910478340A CN110270597B CN 110270597 B CN110270597 B CN 110270597B CN 201910478340 A CN201910478340 A CN 201910478340A CN 110270597 B CN110270597 B CN 110270597B
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- blank
- heating
- heating furnace
- rolling
- temperature control
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 113
- 238000005096 rolling process Methods 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002918 waste heat Substances 0.000 claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000013021 overheating Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229910001234 light alloy Inorganic materials 0.000 description 2
- 230000033764 rhythmic process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- 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
-
- 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
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention belongs to the technical field of blank heating, and particularly relates to a blank heating method in a rolling production process, which comprises the following steps: s1, the blank firstly enters a preheating temperature-controlled heating furnace through a waste heat cavity, and the blank is preliminarily heated through waste heat in the preheating temperature-controlled heating furnace; s2, preheating the blank after primary heating through a primary heating furnace; s3, feeding the preheated blank into a preheating temperature-control heating furnace through a temperature-control cavity for heating to a rolling temperature; and S4, feeding the billet heated in the S3 into a rolling mill for rolling. The main heating process of the blank is carried out in a primary heating furnace, thereby avoiding the phenomena of overheating, overburning and even burning of the blank and effectively reducing the metal loss. The blank firstly primarily increases the temperature through the waste heat of the preheating temperature control heating furnace, and effectively utilizes the waste heat generated in the production process, thereby reducing the burden of the primary heating furnace.
Description
Technical Field
The invention belongs to the technical field of blank heating, and particularly relates to a blank heating method in a rolling production process.
Background
At present, the blank heating in the rolling production process mainly adopts the following modes:
1. continuous furnace heating
The continuous heating furnace heating is the most important blank heating mode in the rolling production process, and blanks are sent into the continuous heating furnaces in different forms by a charging facility. In the production of bar and wire materials, the method is mainly a walking beam type heating furnace, and a blank moves from an inlet to an outlet through a walking beam to achieve the purpose of heating. Since the movable beam needs to move upward and forward in a state of receiving the entire charge, a large amount of energy is consumed. In addition, as the space of the furnace bottom is larger, more heat is generated to be dissipated, and the heat efficiency of the heating furnace is lower. In the production of the pipe, mainly an annular heating furnace is adopted, the blank is sent into the furnace by a mechanical arm, the furnace bottom rotates for one station, then a second blank is sent into the furnace, the furnace bottom rotates for another station until the first blank reaches an outlet, and the mechanical arm takes out the heated blank.
The disadvantages of this heating method are: (1) the furnace bottom needs to move under the state of bearing all furnace charges, the structure of the furnace bottom is heavy, and the energy consumption in operation is high; (2) the space of the furnace bottom is large, the gaps of the furnace body are many, and the heat loss is serious; (3) the furnace is operated at high temperature, and when rolling is not smooth, the blank stays in the furnace or is pushed out of the furnace, so that heat loss and blank loss are caused; (4) the blank is in a high-temperature state for a long time, and the burning loss is serious; (5) the furnace body has large size and low yield per unit area; (6) the furnace is located far from the rolling mill, and the heat loss of the blank is large.
2. Heating with box-type resistance furnace
The heating mode is to use box type resistance furnaces with different forms, to load the blanks into the furnaces in batches, to discharge the blanks out of the furnaces in sequence after reaching the rolling temperature, and to send the blanks into a rolling mill for rolling.
The disadvantages of this approach are: (1) the heating capacity of the furnace is limited, and the furnace cannot adapt to the rolling rhythm of a high-yield rolling mill; (2) the furnace is charged according to batches, the energy consumption is large, and the burning loss of the blank is large; (3) the operation time of the hot blank outside the furnace is long, and the heat loss is large.
3. Induction heating
The heating mode is to use a medium-frequency induction heater to quickly heat the blank, and then the blank is sent into a rolling mill to be rolled.
The disadvantages of this approach are: (1) the heating capacity is limited, and the rolling rhythm of a high-yield rolling mill cannot be adapted; (2) the heating is uneven, the temperature difference between the core and the surface is large, and particularly for large-diameter blanks, the blanks need to be further soaked; (3) the material, size and shape of the blank are limited; (4) when the power supply quality of the power grid fluctuates, the heating temperature is unstable; (5) the temperature rise rate is too fast, and the overshoot phenomenon is difficult to control.
The three heating modes all use one heating furnace, adopt different heating systems, and heat to the rolling temperature once. The preheating, heating and soaking stages of the heating system are completed in a heating furnace. The heating mode is suitable for the mass production process with the same blank material, and is not suitable for the rolling production process of multiple varieties and small batch.
Disclosure of Invention
Aiming at the technical problem, the invention provides a blank heating method in the rolling production process, which utilizes the waste heat to initially increase the temperature, and then heats the blank to the required temperature through a temperature control cavity of a preheating temperature control heating furnace to meet the production requirement.
In order to solve the technical problems, the invention adopts the technical scheme that:
a billet heating method in a rolling production process comprises the following steps:
s1, the blank enters a waste heat cavity of a preheating temperature control heating furnace, and the blank is preliminarily preheated through waste heat in the preheating temperature control heating furnace;
s2, heating the blank after primary preheating through a primary heating furnace;
the blanks heated by the S3 and S2 enter a temperature control cavity of a preheating temperature control heating furnace for heating to a rolling temperature;
and S4, feeding the billet heated in the S3 into a rolling mill for rolling.
The waste heat cavity of the preheating temperature control heating furnace is communicated with the temperature control cavity, wherein the temperature of the temperature control cavity is higher than that of the waste heat cavity, and the temperature control cavity provides a heat source for the waste heat cavity.
The preheating temperature control heating furnace is arranged on a rolling line, and the blank directly enters the rolling mill for rolling after leaving the preheating temperature control heating furnace.
The heating temperature of S2 is lower than the rolling temperature of S3 by 100-300 ℃.
The waste heat cavity and the temperature control cavity are arranged up and down, and the waste heat cavity is positioned below the temperature control cavity.
Compared with the prior art, the invention has the following beneficial effects:
the main heating process of the blank is carried out in a primary heating furnace, thereby avoiding the phenomena of overheating, overburning and even burning of the blank and effectively reducing the metal loss. The blank firstly primarily increases the temperature through the waste heat of the preheating temperature control heating furnace, and effectively utilizes the waste heat generated in the production process, thereby reducing the burden of the primary heating furnace.
The rolling temperature of the blank is adjusted by the preheating temperature-control heating furnace, the discharging temperature of the blank is accurate, and the requirements of different rolling processes on the temperature of the blank can be met.
The preheating temperature control heating furnace is close to the inlet of the rolling mill, so that the temperature drop loss is less, and the temperature difference between the head and the tail of the blank is small. The time of one-time heating can be very long, so that the thermal stress of the blank can be eliminated, and the heating is uniform; the primary heating furnace operates at a lower temperature, the manufacturing cost of the furnace body is reduced, and the service life of the furnace is prolonged; during the rolling intermission, the primary heating furnace is in a heat preservation state, the preheating temperature control heating furnace is in a furnace shutdown state, and the heat loss is small.
Drawings
FIG. 1 is a schematic diagram of one embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a preheating temperature-controlled heating furnace according to the present invention;
wherein: 1 is a primary heating furnace, 2 is a preheating temperature control heating furnace, 21 is a waste heat cavity, 22 is a temperature control cavity, 3 is a rolling mill, 4 is a conveying channel, 5 is a pusher, 6 is a blank, and 7 is a lifter.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A billet heating method in a rolling production process comprises the following steps:
s1, the blank enters a waste heat cavity of a preheating temperature control heating furnace, and the blank is preliminarily preheated through waste heat in the preheating temperature control heating furnace;
s2, heating the blank after primary preheating through a primary heating furnace;
the blanks heated by the S3 and S2 enter a temperature control cavity of a preheating temperature control heating furnace for heating to a rolling temperature;
and S4, feeding the billet heated in the S3 into a rolling mill for rolling.
The primary heating furnace and the preheating temperature-control heating furnace can adopt a continuous heating furnace or other suitable heating furnaces in the prior art, and the difference is that a double channel is arranged in the preheating temperature-control heating furnace, so that the bidirectional running of the blank is ensured.
Furthermore, a waste heat cavity of the preheating temperature control heating furnace is communicated with the temperature control cavity, wherein the temperature of the temperature control cavity is higher than that of the waste heat cavity, and the temperature control cavity provides a heat source for the waste heat cavity.
Furthermore, the preheating temperature control heating furnace is arranged on the rolling line, and the blank directly enters the rolling mill for rolling after leaving the preheating temperature control heating furnace.
Furthermore, the heating temperature of S2 is lower than the rolling temperature of S3 by 100-300 ℃.
Corresponding conveying ways and pusher machines are arranged among the primary heating furnace, the preheating temperature control heating furnace and the rolling mill, the transfer of the blanks is realized through the matching of the conveying ways and the pusher machines, and the specific arrangement of the pusher machines can be adjusted correspondingly according to actual conditions. As shown in fig. 1, the waste heat chamber and the temperature control chamber can be arranged left and right; as shown in fig. 2 and 3, the waste heat chamber and the temperature control chamber can be arranged up and down, the waste heat chamber is located below the temperature control chamber, a corresponding lifting mechanism needs to be arranged when the waste heat chamber is arranged up and down, and the preheated blank enters the primary heating furnace through a lifter and a pusher.
The moving speed of the waste heat cavity and the temperature control cavity can be correspondingly adjusted according to the requirement; the preheating temperature and the rolling temperature are adjusted according to a specific production process, and the method specifically comprises the following steps:
example one
Rolling light alloy tubes to produce, wherein the blank material is as follows: light alloy 6063, rolling mill: three-roller cross rolling piercing mill.
The blank enters a preheating temperature control heating furnace for preliminary heating and temperature rise, then enters a primary heating furnace for heating to 550 ℃, then enters the preheating temperature control heating furnace for heating to 650 ℃, and finally is rolled by a rolling mill.
Example two
Rolling production of titanium alloy bars, and preparing blank materials: TC4 titanium alloy, mill: three-roller bar wire continuous rolling unit.
The blank enters a preheating temperature control heating furnace for primary heating and temperature rise, then enters a primary heating furnace for heating to 750 ℃, then enters the preheating temperature control heating furnace for heating to 900 ℃, and finally is rolled by a rolling mill.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (2)
1. A blank heating method in a rolling production process is characterized by comprising the following steps:
s1, the blank enters a waste heat cavity of a preheating temperature control heating furnace, and the blank is preliminarily preheated through waste heat in the preheating temperature control heating furnace;
s2, heating the blank after primary preheating through a primary heating furnace;
the blanks heated by the S3 and S2 enter a temperature control cavity of a preheating temperature control heating furnace for heating to a rolling temperature; the heating temperature of S2 is lower than the rolling temperature by 100-300 ℃;
s4, feeding the blanks heated in the S3 into a rolling mill for rolling;
the waste heat cavity of the preheating temperature control heating furnace is communicated with the temperature control cavity, wherein the temperature of the temperature control cavity is higher than that of the waste heat cavity, and the temperature control cavity provides a heat source for the waste heat cavity; the waste heat cavity and the temperature control cavity are arranged up and down, and the waste heat cavity is positioned below the temperature control cavity; the preheated blank enters the primary heating furnace through the lifter and the pusher.
2. A method of heating a billet in a rolling production process according to claim 1, characterized in that: the preheating temperature control heating furnace is arranged on a rolling line, and the blank directly enters the rolling mill for rolling after leaving the preheating temperature control heating furnace.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910478340.8A CN110270597B (en) | 2019-06-03 | 2019-06-03 | Blank heating method in rolling production process |
| US16/891,106 US20200377988A1 (en) | 2019-06-03 | 2020-06-03 | Method for heating blank for rolling production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910478340.8A CN110270597B (en) | 2019-06-03 | 2019-06-03 | Blank heating method in rolling production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110270597A CN110270597A (en) | 2019-09-24 |
| CN110270597B true CN110270597B (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910478340.8A Active CN110270597B (en) | 2019-06-03 | 2019-06-03 | Blank heating method in rolling production process |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20200377988A1 (en) |
| CN (1) | CN110270597B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114367536A (en) * | 2022-01-06 | 2022-04-19 | 上海轩田工业设备有限公司 | Rolling processing equipment and method for radioactive material plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS53147612A (en) * | 1977-05-30 | 1978-12-22 | Kawasaki Steel Co | Method of uniformly heating steel block utillizing heat contained within demolded steel block |
| US5314169A (en) * | 1992-08-26 | 1994-05-24 | A. C. Leadbetter & Son, Inc. | Method and apparatus for heat treating elongate metallic products |
| CN201083461Y (en) * | 2007-07-19 | 2008-07-09 | 宝山钢铁股份有限公司 | Heat accumulation type bar plate heating stove |
| CN101441037A (en) * | 2007-11-21 | 2009-05-27 | 中冶赛迪工程技术股份有限公司 | Annular furnace and annular furnace heat supply process |
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| CN201737980U (en) * | 2010-06-13 | 2011-02-09 | 浙江佰耐钢带有限公司 | Steel strip hot treatment system with residual-heat utilization device |
| CN102268532A (en) * | 2011-07-28 | 2011-12-07 | 攀钢集团有限公司 | Method for realizing low-temperature heating process by using conventional walking beam type heating furnace |
| CN206572555U (en) * | 2017-01-22 | 2017-10-20 | 重庆市旺利原农业发展有限公司 | Firewood energy-saving stove with residual neat recovering system |
| CN107543421A (en) * | 2017-08-09 | 2018-01-05 | 中冶华天工程技术有限公司 | Produce the pusher-type furnace apparatus for vapour-cooling of superheated steam |
| CN107976061A (en) * | 2017-12-28 | 2018-05-01 | 陕西能源职业技术学院 | A kind of vertical ceramic firing heating unit of continous way and heating means |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106868290B (en) * | 2017-03-23 | 2018-10-12 | 东北大学 | Al alloy parts heat treatment experiment method |
-
2019
- 2019-06-03 CN CN201910478340.8A patent/CN110270597B/en active Active
-
2020
- 2020-06-03 US US16/891,106 patent/US20200377988A1/en not_active Abandoned
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53147612A (en) * | 1977-05-30 | 1978-12-22 | Kawasaki Steel Co | Method of uniformly heating steel block utillizing heat contained within demolded steel block |
| US5314169A (en) * | 1992-08-26 | 1994-05-24 | A. C. Leadbetter & Son, Inc. | Method and apparatus for heat treating elongate metallic products |
| CN201083461Y (en) * | 2007-07-19 | 2008-07-09 | 宝山钢铁股份有限公司 | Heat accumulation type bar plate heating stove |
| CN101441037A (en) * | 2007-11-21 | 2009-05-27 | 中冶赛迪工程技术股份有限公司 | Annular furnace and annular furnace heat supply process |
| CN101956057A (en) * | 2010-06-13 | 2011-01-26 | 浙江佰耐钢带有限公司 | Steel band thermal treatment system with waste heat utilization device |
| CN201737980U (en) * | 2010-06-13 | 2011-02-09 | 浙江佰耐钢带有限公司 | Steel strip hot treatment system with residual-heat utilization device |
| CN102268532A (en) * | 2011-07-28 | 2011-12-07 | 攀钢集团有限公司 | Method for realizing low-temperature heating process by using conventional walking beam type heating furnace |
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| CN107976061A (en) * | 2017-12-28 | 2018-05-01 | 陕西能源职业技术学院 | A kind of vertical ceramic firing heating unit of continous way and heating means |
| CN208167063U (en) * | 2017-12-30 | 2018-11-30 | 福建三宝钢铁有限公司 | A kind of pusher-type furnace is into steel platform |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110270597A (en) | 2019-09-24 |
| US20200377988A1 (en) | 2020-12-03 |
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