CN110961473A - Indirect heat conveying and hot charging device and process for continuous casting billet - Google Patents
Indirect heat conveying and hot charging device and process for continuous casting billet Download PDFInfo
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- CN110961473A CN110961473A CN201911280646.9A CN201911280646A CN110961473A CN 110961473 A CN110961473 A CN 110961473A CN 201911280646 A CN201911280646 A CN 201911280646A CN 110961473 A CN110961473 A CN 110961473A
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- hot
- heat
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- 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
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- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/466—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 metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
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- 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
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/02—Skids or tracks for heavy objects
- F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Metal Rolling (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention provides an indirect hot feeding and hot charging device and a process for a continuous casting billet, wherein the device consists of a double-layer roller way and a heat preservation cover, and the double-layer roller way comprises a hot feeding roller way and an indirect hot feeding roller way; the heat-insulating cover is matched with the double-layer roller way in structure size, completely covers the heat-insulating roller way and the corresponding hot roller conveying way part positioned below the heat-insulating roller way, and the indirect hot roller conveying way is arranged above the hot roller conveying way. The hot billet heats the cold billet in a heat radiation mode in the device provided by the invention, so that the temperature of the cold billet is increased. By the invention, the continuous casting billet is subjected to 100% hot feeding and hot charging production, the heat of the billet is effectively utilized, the energy consumption of the heating furnace is reduced, the yield of steel is improved, and the production cost is greatly reduced.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to an indirect continuous casting billet hot conveying and hot charging device and process.
Background
At present, two modes of hot feeding and hot loading and cold loading of continuous casting billets are generally adopted in a heating procedure of steel rolling production. Generally speaking, low-grade continuous casting billets such as common carbon steel and the like have mature and stable production process and good surface quality, can realize direct hot conveying and hot charging, but have serious heat loss in the conveying process of the continuous casting billets. The production method mainly adopts the steps that the continuous casting billet is offline and naturally cooled to room temperature, then the surface quality of the continuous casting billet is checked, and after the defects are eliminated, the continuous casting billet is cooled and sent into a heating furnace for heating.
The cold charging production process of the continuous casting billet can greatly ensure the quality of products, but increases the energy consumption of a heating furnace, reduces the yield and greatly increases the production cost.
At present, the hot conveying and hot charging of the continuous casting billet is mainly realized in a way that a high-temperature continuous casting billet (generally above 600 ℃) directly enters a heating furnace through a conveying roller way, and the continuous casting billet can be heated to a target temperature (generally above 1200 ℃) at a higher temperature through the hot conveying and hot charging of the continuous casting billet, so that the energy consumption can be well reduced, the heating efficiency can be improved, and the heating time can be shortened in a heating procedure. However, during the transportation of the steel billet, the steel billet is directly exposed to the air, and no heat collecting or recycling device is provided, so that the heat is lost.
And after the completely cooled cold blank enters the heating furnace through the conveying roller way in a cold charging mode, the cold blank is heated to a target temperature (the heating target temperature is generally over 1200 ℃) from the normal temperature, and the energy consumption, the heating time and the production efficiency of the heating furnace are greatly reduced. On the one hand, the heat is lost in vain and is not utilized, and on the other hand, the cold charging process needs a lot of extra heat. Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
Aiming at the defects and the blank of research in the prior art, the invention aims to solve the problems of low hot charging rate, high energy consumption and high production cost in the production process of steel products. The invention provides an indirect hot-feeding and hot-charging device and process for a continuous casting billet, which effectively utilize the heat of a hot billet, heat the cold billet in a heat radiation mode, improve the temperature of the cold billet, realize 100 percent hot-feeding and hot-charging in the steel rolling production, reduce the heat loss, reduce the energy consumption of a heating furnace and improve the yield of steel products.
In order to achieve the purpose, the invention provides the following technical scheme:
an indirect hot conveying and hot charging device for a continuous casting billet is composed of a double-layer roller way and a heat insulation cover, wherein the double-layer roller way comprises a hot conveying roller way and an indirect hot conveying roller way;
the heat-insulating cover is matched with the double-layer roller way in structure size, and completely covers the heat-insulating roller way and the corresponding hot conveying roller way part positioned below the heat-insulating roller way. The indirect hot roller conveying table is arranged above the hot roller conveying table. In the device, the hot steel blank heats the cold steel blank in a heat radiation mode, and the temperature of the cold steel blank is increased.
Preferably, the hot roller conveying table consists of a feeding roller table and a discharging roller table, the indirect hot roller conveying table comprises three roller tables consisting of three sections of the indirect hot feeding roller table, the indirect hot feeding heat preservation roller table and the indirect hot feeding discharging roller table, the three roller tables are continuously arranged, and each roller table can be independently controlled.
Preferably, the heat preservation cover is in an open cover shape and comprises a top cover steel plate, side cover steel plates, heat preservation materials and a steel wire mesh, the top cover steel plate is connected and fixed with the two side cover steel plates to form a heat preservation cover body, the steel wire mesh is fixed in the cover body, and the heat preservation materials are filled between the top cover steel plate and the steel wire mesh and between the side cover steel plate and the steel wire mesh. The size of the heat-insulating cover is matched with the structural size of the double-layer roller way, the heat-insulating cover completely covers the heat-insulating roller way and the corresponding hot conveying roller way part positioned below the heat-insulating roller way, and the heat-insulating cover is opened along the blank conveying direction.
Insulating materials are well known in the art.
The invention relates to an indirect hot conveying and hot charging process for a continuous casting billet, which comprises the following steps of:
1) the high-temperature continuous casting billet produced by a continuous casting machine is fed into a heat-preserving cover by a hot feeding roller way after being sized by a flame cutting machine, the heat-preserving cover is internally insulated by heat-preserving materials, the heat radiated by the hot billet is collected in the heat-preserving cover, the hot billet continuously runs according to the production rhythm, and enters a heating furnace feeding joist by a discharging roller way after going out of the heat-preserving cover.
2) The cold billet is hoisted to the indirect heat feeding roller way by the hoisting device, conveyed to the heat preservation cover and positioned on the heat preservation roller way, the continuous casting hot billet positioned on the heat feeding roller way is heated in a heat radiation mode in the step 1), the cold billet is kept warm in the heat preservation cover for 1-2 hours (the specific time can be set manually) and then goes out of the heat preservation cover and enters the indirect heat feeding roller way, the temperature can reach more than 400 ℃, the temperature of the hot feeding of the heating furnace is reached, and the hot feeding of the heating furnace is realized by the hoisting device and is conveyed to the feeding supporting beam of the heating furnace.
Preferably, in the step 2), the hot blank heats the cold blank positioned on the indirect hot roller conveying way in a heat radiation mode.
Preferably, in the step 2), the cold blank is insulated in the insulation cover for 1-2 hours.
Compared with the prior art, the invention has the following excellent effects:
1) the invention collects and effectively utilizes the heat dissipated in the conveying process of the hot blank in the prior art, and heats the cold blank in a heat radiation mode, thereby realizing the secondary utilization of energy and reducing the loss of energy.
2) The cold billet is heated by utilizing the heat lost in the hot conveying and hot charging process, so that the heat is recycled, the temperature of the cold billet is increased, and the indirect hot conveying and hot charging of the continuous casting billet is realized.
3) In the prior art, a hot billet and a cold billet are heated according to different heating processes, and the cold billet heating process needs higher temperature and heating time.
Drawings
FIG. 1 is a front view of a continuous casting slab hot-delivery and hot-charging apparatus of the present invention;
FIG. 2 is a side view of the heat retention shield of the present invention;
reference numerals:
1-a continuous casting machine; 2-indirectly feeding the materials into a material roller way by heat; 3-a heat preservation cover; 4-indirectly hot conveying the steel billet; 5-feeding a joist by a heating furnace; 6, heating a furnace; 7-hot feeding the steel billet; 8-hot feeding into a material roller way; 9-flame cutting machine; 10-indirect hot feeding and discharging roller bed; 11-hot feeding and discharging roller bed; 12-indirectly carrying out hot conveying on a heat preservation roller way; 13-side cover steel plate of the heat preservation cover; 14-thermal insulation material; 15-heat preservation cover top cover steel plate; 16-steel wire mesh.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
According to an embodiment of the invention, a continuous casting billet hot conveying and hot charging device is provided. The continuous casting billet hot feeding and hot charging device comprises a double-layer structure consisting of a hot feeding roller way 8, a hot feeding and discharging roller way 11, an indirect hot feeding roller way 2, an indirect hot feeding heat preservation roller way 12, an indirect hot feeding and discharging roller way 10 and a heat preservation roller way 3, wherein the indirect hot feeding roller ways 2, 10 and 12 are positioned on the hot feeding roller ways 8 and 11. The indirect heating feeding roller bed 2, the indirect heating feeding heat preservation roller bed 12 and the indirect heating feeding discharging roller bed 10 are controlled independently.
The heat preservation cover 3 is in an open cover shape and comprises a top cover steel plate 15, side cover steel plates 13, heat preservation materials 14 and a steel wire mesh 16, the top cover steel plate 15 is fixedly connected with the two side cover steel plates 13 to form a heat preservation cover body, the steel wire mesh 16 is fixed in the cover body, and the heat preservation materials 14 are filled between the top cover steel plate 15 and the steel wire mesh 16 and between the side cover steel plates 13 and the steel wire mesh 16. The size of the heat-insulating cover 3 is matched with the structural size of the double-layer roller way, the heat-insulating roller way 12 and the corresponding hot conveying roller way 8 part below the heat-insulating roller way are completely covered, and the heat-insulating cover 3 is opened along the blank conveying direction A-A, B-B.
According to the embodiment of the invention, a continuous casting billet hot conveying and hot charging process is provided. The technological process of the invention comprises the steps that a high-temperature continuous casting billet produced by a continuous casting machine 1 is sized by a flame cutting machine 9 to form a hot-feeding continuous casting billet 7, the hot-feeding continuous casting billet 7 is fed into a heat-preserving cover 3 by a hot-feeding roller 8, the heat-preserving cover 3 is insulated by a heat-preserving material 14, the heat radiated by the hot billet 7 is collected in the heat-preserving cover 3, the hot billet 7 continuously runs according to the production rhythm, and after the hot billet exits from the heat-preserving cover 3, the hot billet enters a feeding supporting beam 5 of a heating furnace through a discharging roller way 11 and then is fed into the heating furnace 6 to. The indirect hot steel conveying billets 4 are conveyed to the indirect hot conveying feeding roller way 2 by a lifting device, conveyed into the heat preservation cover 3 and positioned above the heat preservation roller way 12, the hot billets 7 positioned on the hot conveying roller way 8 heat the indirect hot steel conveying billets 4 positioned on the indirect hot conveying heat preservation roller way in the heat preservation cover 3 in a heat radiation mode, the indirect hot steel conveying billets 4 are heat preserved for 1-2 hours (the specific time can be set manually) in the heat preservation cover 3 and enter the indirect hot conveying discharging roller way 10, the temperature can reach above 400 ℃, the temperature of hot charging of the heating furnace 6 is reached, the indirect hot steel conveying billets are lifted to the heating furnace feeding supporting beam 5 by the lifting device and then are conveyed into the heating furnace 6 to be heated.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1) the invention collects and effectively utilizes the heat dissipated in the conveying process of the hot blank in the prior art, and heats the cold blank in a heat radiation mode, thereby realizing the secondary utilization of energy and reducing the loss of energy.
2) In the prior art, a hot billet and a cold billet are heated according to different heating processes, and the heating process of the cold billet needs higher temperature and heating time.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. An indirect hot conveying and hot charging device for a continuous casting billet is characterized by comprising a double-layer roller way and a heat insulation cover, wherein the double-layer roller way comprises a hot conveying roller way and an indirect hot conveying roller way;
the heat-insulating cover is matched with the double-layer roller way in structure size, completely covers the heat-insulating roller way and the corresponding hot roller conveying way part positioned below the heat-insulating roller way, and the indirect hot roller conveying way is arranged above the hot roller conveying way.
2. The apparatus of claim 1, wherein the hot feed roller table is comprised of a feed roller table and a discharge roller table.
3. The device according to claim 1, wherein the indirect thermal roller way comprises three roller ways, namely an indirect thermal feeding roller way, an indirect thermal feeding heat preservation roller way and an indirect thermal feeding discharging roller way, the three roller ways are continuously arranged, and each roller way is independently controlled.
4. The device of claim 1, wherein the heat retention shield is in the form of an open hood.
5. The device of claim 1, wherein the heat-insulating cover is composed of a top cover steel plate, a side cover steel plate, heat-insulating materials and a steel wire mesh.
6. The device according to claim 5, characterized in that the top cover steel plate and the two side cover steel plates are connected and fixed to form a heat-insulating cover body, the steel wire mesh is fixed inside the cover body, heat-insulating materials are filled between the top cover steel plate and the steel wire mesh and between the side cover steel plate and the steel wire mesh, and the heat-insulating cover is opened along the blank conveying direction.
7. An indirect hot-feeding and hot-charging process for a continuous casting slab, comprising the apparatus of claim 1, comprising the steps of:
1) the continuous casting billet produced by a continuous casting machine is sized by a flame cutting machine to form a hot-feeding continuous casting billet, the hot-feeding continuous casting billet is fed into a heat-insulating cover by a hot-feeding roller way, the continuous casting hot billet runs, and after the hot-casting hot billet exits from the heat-insulating cover, the hot-casting hot billet enters a heating furnace feeding joist by a discharging roller way and then is fed into the heating furnace to heat the continuous casting billet;
2) and (2) hoisting the cold blank to an indirect heat feeding roller way, conveying the cold blank to a heat preservation cover and on the heat preservation roller way, heating the cold blank positioned on the indirect heat feeding roller way by the continuous casting hot blank in the step 1), keeping the temperature of the cold blank in the heat preservation cover, discharging the cold blank out of the heat preservation cover, feeding the cold blank into the indirect heat feeding roller way, and hoisting the cold blank to a heating furnace feeding joist.
8. The process according to claim 7, wherein in step 2), the continuously cast hot billet heats the cold billet located on the indirect hot roller conveyor by means of heat radiation.
9. The process as claimed in claim 7, wherein in the step 2), the cold blank is kept in a heat-preserving cover for 1-2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911280646.9A CN110961473A (en) | 2019-12-13 | 2019-12-13 | Indirect heat conveying and hot charging device and process for continuous casting billet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911280646.9A CN110961473A (en) | 2019-12-13 | 2019-12-13 | Indirect heat conveying and hot charging device and process for continuous casting billet |
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| Publication Number | Publication Date |
|---|---|
| CN110961473A true CN110961473A (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911280646.9A Pending CN110961473A (en) | 2019-12-13 | 2019-12-13 | Indirect heat conveying and hot charging device and process for continuous casting billet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113084108A (en) * | 2021-03-31 | 2021-07-09 | 成渝钒钛科技有限公司 | Indirect heat conveying and hot charging device for continuous casting billets and using method thereof |
| CN114752746A (en) * | 2022-03-29 | 2022-07-15 | 太原重工工程技术有限公司 | Multi-mode steel pipe rolling process |
-
2019
- 2019-12-13 CN CN201911280646.9A patent/CN110961473A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113084108A (en) * | 2021-03-31 | 2021-07-09 | 成渝钒钛科技有限公司 | Indirect heat conveying and hot charging device for continuous casting billets and using method thereof |
| CN113084108B (en) * | 2021-03-31 | 2022-07-15 | 成渝钒钛科技有限公司 | Indirect heat conveying and hot charging device for continuous casting billets and using method thereof |
| CN114752746A (en) * | 2022-03-29 | 2022-07-15 | 太原重工工程技术有限公司 | Multi-mode steel pipe rolling process |
| CN114752746B (en) * | 2022-03-29 | 2023-07-21 | 太原重工工程技术有限公司 | Multi-mode steel pipe rolling process |
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