CN220887633U - Multi-furnace body heating furnace - Google Patents
Multi-furnace body heating furnace Download PDFInfo
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- CN220887633U CN220887633U CN202322381788.2U CN202322381788U CN220887633U CN 220887633 U CN220887633 U CN 220887633U CN 202322381788 U CN202322381788 U CN 202322381788U CN 220887633 U CN220887633 U CN 220887633U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 145
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000003546 flue gas Substances 0.000 claims abstract description 63
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 238000007599 discharging Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 abstract description 4
- 239000000779 smoke Substances 0.000 description 8
- 239000002436 steel type Substances 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000009347 mechanical transmission Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The utility model discloses a multi-furnace body heating furnace, which comprises a furnace loading bench, a preheating furnace body, a heating furnace body and a heating furnace discharging roller way, wherein a preheating furnace feeding roller way and an auxiliary roller way are respectively arranged at two sides of the interior of the preheating furnace body, a plurality of steel fetching machines are arranged outside one side of the preheating furnace body, which is close to the auxiliary roller way, and the auxiliary roller way and the heating furnace discharging roller way are positioned at two sides of the heating furnace body, and the multi-furnace body heating furnace comprises: the preheating furnace body is kept away from one side of getting the steel machine and installs the preheating furnace gas outlet pipe, be connected with the flue gas connecting pipe between preheating furnace body and the heating furnace body, wherein, bottom one side of preheating furnace body is connected with the preheating furnace gas inlet hole, bottom one side of heating furnace body is connected with the heating furnace gas outlet hole to satisfy the steel grade heating requirement of different characteristics, thereby realize that a set of heating furnace system satisfies the steel grade heating requirement of multiple different characteristics, realize energy saving and consumption reduction simultaneously.
Description
Technical Field
The utility model relates to the technical field of metal pressure processing, in particular to a multi-furnace body heating furnace.
Background
The existing steel enterprise billet heating furnace is generally divided into a preheating section, a heating section and a soaking section, is suitable for the diffusion requirement of part of alloy steel alloy components, has strict requirement on the furnace time of the heating furnace, is longer and longer in furnace body construction, and has more and more tonnage of steel in the furnace and larger investment. The long heating furnace has long time for the billet to be heated, and is not suitable for producing the steel grade with partial easy decarburization. Meanwhile, the preheating section, the heating section and the soaking section are arranged in the same furnace, and furnace walls are arranged in the furnace to separate, but under the condition of fluctuation of gas pressure and heat value, the flue gas of the relatively hot heating section in the furnace cannot be controlled to flow into the preheating section, the temperature and the heating speed of the preheating section cannot be accurately controlled, and heat crack sensitive steel with strict requirements on the heating speed is very easy to generate heat crack, so that the product quality is influenced.
For the reasons, the steel types produced by the existing steel mill under the influence of the heating furnace are very limited, the steel types which are easy to decarbonize cannot be produced by the long-furnace manufacturer, meanwhile, the temperatures of the preheating section and the heating section are required to be strictly controlled in the process of producing the steel types which are sensitive to hot cracks, and only part of burners of the heating section are closed to ensure that the steel billets are slowly heated, so that the heating capacity of the heating furnace cannot be exerted.
Meanwhile, the steel types which are easy to decarbonize, heat sensitive and the steel types with the constituent elements needing to be diffused for a long time are frequently switched by using methods of empty furnace production, empty furnace charging and the like, so that the steel types are switched with great impact on production.
In addition, the current heating furnace generally extracts the flue gas in the preheating section, and as the heating section and the preheating section are not fully separated, the flue gas temperature is affected by the temperature of the preheating section, the exhaust temperature of the flue gas is difficult to control, the temperature fluctuation of the flue gas exhausted by the heating furnace is large, the flue gas temperature is higher, and the energy conservation and consumption reduction of the heating furnace are not facilitated.
A multi-furnace heating furnace has been proposed in order to solve the problems set forth in the foregoing.
Disclosure of utility model
The utility model aims to provide a multi-furnace body heating furnace, which solves the defects existing in the prior art, thereby meeting the steel grade heating requirements of different characteristics, realizing that one set of heating furnace system meets the steel grade heating requirements of a plurality of different characteristics, and simultaneously realizing energy conservation and consumption reduction.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the multi-furnace body heating furnace comprises a furnace loading bench, a preheating furnace body, a heating furnace body and a heating furnace discharging roller way, wherein a preheating furnace feeding roller way and an auxiliary roller way are respectively arranged on two sides of the interior of the preheating furnace body;
A plurality of steel taking machines are arranged outside one side of the preheating furnace body, which is close to the auxiliary roller way, and the auxiliary roller way and the heating furnace discharging roller way are positioned at two sides of the heating furnace body;
Further comprises:
A flue gas outlet pipe of the preheating furnace is arranged on one side of the preheating furnace body far away from the steel taking machine, and a flue gas connecting pipe is connected between the preheating furnace body and the heating furnace body;
The preheating furnace comprises a preheating furnace body, a heating furnace and a heating furnace, wherein one side of the bottom of the preheating furnace body is connected with a preheating furnace flue gas inlet hole, and one side of the bottom of the heating furnace body is connected with a heating furnace flue gas outlet hole;
Wherein, the preheating furnace body and the inside of heating furnace body are installed with a plurality of nozzles.
Preferably, the preheating furnace roller way is provided with a plurality of first sliding grooves uniformly, the first sliding grooves are formed in the bottom of the preheating furnace body, the furnace loading rack is in sliding connection with the first sliding grooves, and the auxiliary roller way is used for discharging the preheating furnace body and loading the heating furnace body.
Preferably, the heating furnace flue gas outlet hole is communicated with the inside of the heating furnace body, and the heating furnace flue gas outlet hole is communicated with the flue gas connecting pipe.
Preferably, the flue gas inlet hole of the preheating furnace is communicated with the interior of the preheating furnace body, and the flue gas inlet hole of the preheating furnace is communicated with the flue gas connecting pipe.
Preferably, the other side of the bottom of the preheating furnace body is connected with a preheating furnace flue gas outlet hole, and the preheating furnace flue gas outlet hole is in through connection with a preheating furnace flue gas outlet pipe.
Preferably, a second chute is formed in the bottom of the heating furnace body, and the furnace charging rack is in sliding connection with the second chute.
Preferably, the auxiliary roller way and the heating furnace discharging roller way are provided with a plurality of auxiliary roller ways, and the charging rack is in sliding connection with the preheating furnace feeding roller way, the auxiliary roller way and the heating furnace discharging roller way.
Compared with the prior art, the utility model has the beneficial effects that: by means of the arrangement of the device,
The concrete contents are as follows:
1. Because the heating furnace is provided with a plurality of furnace bodies, the preheating furnace body is separated from the heating furnace body, high-temperature flue gas of the heating furnace body is used as a heat source of the preheating furnace body to preheat billets, the temperature of flue gas discharged by the preheating furnace body is the final flue gas temperature of the heating furnace, a small number of burners can be arranged in the preheating furnace body to be used as auxiliary heating adjustment burners, the flue gas temperature of the heating furnace can be controlled accurately, the flue gas temperature can be controlled at the lower limit of dew point corrosion prevention temperature, so that energy consumption is reduced, and no corrosion to a chimney is generated.
2. The steel grade which is easy to decarbonize is required to be heated rapidly, the in-furnace time is reduced as much as possible, and the steel grade can be directly fed into the heating furnace body to be produced without passing through the preheating furnace body so as to reduce the heating time for placing decarbonizing. The steel grade needing slow heating can be produced, and the temperature can be slowly increased to be higher than the AC3 temperature in the preheating furnace body so as to avoid hot cracking caused by fast heating. In the production of steel grades requiring long-time diffusion of alloy elements, diffusion can be carried out in a preheating furnace body instead of stopping the furnace in a heating furnace for heat preservation. The steel billet is slowly heated up or diffused for a long time in the preheating furnace body, and the furnace does not need to be stopped for waiting for temperature, and at the moment, the heating furnace body can simultaneously produce the steel grade which does not need to be slowly heated or diffused for a long time for alloy elements so as to ensure the continuity of production.
3. For the old heating furnace, a preheating furnace body can be directly added to improve the heating capacity, and meanwhile, the steel grade range which can be produced by the heating furnace is enlarged. The heating capacity is increased without the need of dismantling and rebuilding the old heating furnace, thereby saving investment.
4. Because the furnace body is divided into a plurality of parts, the stress of the mechanical transmission part is only one-half of that of a single furnace body heating furnace, the investment of the mechanical transmission part is reduced, the maintenance difficulty is reduced, the multiple furnace bodies are connected together, and the possibility that the continuous heating furnace is used for heating the steel billet with the oversized section which needs to be heated for a long time is provided.
5. For the existing regenerative heating furnace, as the temperature distribution in the heating furnace is uniform, the high temperature section is immediately connected after the steel enters the heating furnace, the temperature of the steel is fast, and the regenerative heating furnace is not suitable for producing steel types which are easy to generate thermal cracks with high heating speed. According to the utility model, a preheating furnace body is newly added at the side or the front of the heat accumulating type heating furnace to form a multi-furnace body type heating furnace, steel is slowly heated to the line A3 in the preheating furnace body and then enters the heat accumulating type heating furnace, so that the problem of hot cracking caused by excessively fast steel heating is solved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic view of the charging stand structure of the present utility model;
FIG. 3 is a schematic diagram of the structure of a preheating furnace body according to the present utility model;
FIG. 4 is an enlarged schematic view of the structure of FIG. 1 according to the present utility model;
FIG. 5 is a schematic view of the structure of the heating furnace body of the present utility model.
In the figure: 1. charging rack; 2. a preheating furnace roller way is arranged in the furnace; 3. preheating a furnace body; 4. an auxiliary roller way; 5. a steel taking machine; 6. heating the furnace body; 7. discharging roller way of heating furnace; 8. a preheating furnace flue gas outlet pipe; 9. a flue gas connecting pipe; 10. a flue gas outlet hole of the heating furnace; 11. a flue gas inlet hole of the preheating furnace; 12. and a flue gas outlet hole of the preheating furnace.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-5, the present utility model provides the following technical solutions: the utility model provides a many furnace bodies heating furnace, includes loading rack 1, preheating furnace body 3 and heating furnace body 6, and preheating furnace roller table 2 and auxiliary roller table 4 are installed respectively to the inside both sides of preheating furnace body 3, and auxiliary roller table 4 is used for the loading of preheating furnace body 3's play stove and heating furnace body 6.
The preheating furnace roller way 2 is uniformly provided with a plurality of, the bottom of the preheating furnace body 3 is provided with a first chute, the charging rack 1 is in sliding connection with the first chute, one side of the preheating furnace body 3, which is close to the auxiliary roller way 4, is externally provided with a plurality of steel fetching machines 5, and the auxiliary roller way 4 and the heating furnace roller way 7 are positioned at two sides of the heating furnace body 6.
The auxiliary roller way 4 and the heating furnace discharging roller way 7 are provided with a plurality of charging racks 1 which are in sliding connection with the preheating furnace feeding roller way 2, the auxiliary roller way 4 and the heating furnace discharging roller way 7.
A preheating furnace flue gas outlet pipe 8 is arranged on one side of the preheating furnace body 3 far away from the steel taking machine 5, and a flue gas connecting pipe 9 is connected between the preheating furnace body 3 and the heating furnace body 6.
Wherein, one side of the bottom of the preheating furnace body 3 is connected with a preheating furnace flue gas inlet hole 11, the preheating furnace flue gas inlet hole 11 is communicated with the inside of the preheating furnace body 3, and the preheating furnace flue gas inlet hole 11 is communicated with a flue gas connecting pipe 9.
The second spout has been seted up to the bottom of heating furnace body 6, and charging rack 1 and second spout sliding connection, and bottom one side of heating furnace body 6 is connected with heating furnace flue gas outlet 10, and wherein, the internally mounted of preheating furnace body 3 and heating furnace body 6 has a plurality of nozzle, and heating furnace flue gas outlet 10 is linked together with the inside of heating furnace body 6, and heating furnace flue gas outlet 10 and flue gas connecting pipe 9 link up and are connected.
The other side of the bottom of the preheating furnace body 3 is connected with a preheating furnace flue gas outlet hole 12, and the preheating furnace flue gas outlet hole 12 is in through connection with a preheating furnace flue gas outlet pipe 8.
Embodiment one: when producing steel grades which need slow heating and are easy to crack at an excessively fast heating temperature, the typical method of the utility model is as follows:
at this time, the preheating furnace body 3 is put in, steel moves on the charging rack 1 towards the direction of the preheating furnace feeding roller way 2, enters the preheating furnace body 3 through the preheating furnace feeding roller way 2, moves to the other side of the preheating furnace body 3, at this time, the steel is slowly heated to the temperature above the AC3 line through high-temperature flue gas of the heating furnace body 6 in the preheating furnace body 3 and a small amount of burners arranged on the preheating furnace body 3, the steel is taken out through the steel taking machine 5 and placed on the auxiliary roller way 4, the roller way rotates, the steel is input into the heating furnace body 6, and then enters the heating furnace discharging roller way 7 for output after being continuously heated to the required rolling temperature in the heating furnace body 6, and then enters the rolling mill for rolling.
At this time, the high-temperature flue gas enters the preheating furnace body 3 from the flue gas outlet hole 10 of the heating furnace through the flue gas connecting pipe 9 through the flue gas inlet hole 11 of the preheating furnace to preheat the steel billet, thereby fully utilizing the high-temperature flue gas of the heating furnace body 6 to preheat the steel billet, and then matching with a small amount of burners arranged in the furnace body to realize slow temperature rise of the steel billet in the preheating furnace body according to a preset temperature rise curve, so as to ensure the heating quality.
Embodiment two: when the product easy to decarbonize is produced, the heating time is required to be shortened as much as possible to heat rapidly, the preheating furnace body 3 is not required at this moment, the billet on the charging rack 1 does not pass through the preheating furnace body 3 any more, the charging rack 1 moves towards the auxiliary roller way 4, the billet directly enters the heating furnace body 6 through the roller way, the billet does not pass through the preheating furnace body 3 any more, the heating time is greatly shortened, decarburization can be effectively prevented, the preheating furnace body 3 can continuously store the steel grade which needs to be longer in the furnace time at this moment, the burner in the preheating furnace body 3 is closed, and the billet is preheated only by utilizing high-temperature flue gas so as to save energy and reduce consumption.
Working principle:
Before the multi-furnace body heating furnace is used, the whole condition of the device needs to be checked firstly to ensure that normal operation can be carried out, high-temperature smoke in the heating furnace body 6 is input through a heating furnace smoke outlet hole 10 and enters a preheating furnace smoke inlet hole 11 through a smoke connecting pipe 9 at the same time, so that the high-temperature smoke enters the preheating furnace body 3 to preheat steel billets, and finally the smoke is discharged into a preheating furnace smoke outlet pipe 8 through a preheating furnace smoke outlet hole 12.
When producing the steel grade which can be hot-filled, the process is adopted to empty the preheating furnace body 3 so as to shorten the heating time and reduce the burning loss, and for the production line with the heating capacity far lower than the rolling capacity, a new preheating furnace body 3 can be adopted to preheat the steel billet entering the heating furnace body 6 through the preheating furnace body 3, thereby greatly improving the heating capacity of the heating furnace with relatively small investment and meeting the rolling capacity of the rolling line.
Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.
Claims (7)
1. The multi-furnace body heating furnace comprises a furnace loading bench (1), a preheating furnace body (3), a heating furnace body (6) and a heating furnace discharging roller way (7), wherein a preheating furnace feeding roller way (2) and an auxiliary roller way (4) are respectively arranged on two sides of the interior of the preheating furnace body (3);
A plurality of steel taking machines (5) are arranged outside one side of the preheating furnace body (3) close to the auxiliary roller way (4), and the auxiliary roller way (4) and the heating furnace discharging roller way (7) are positioned at two sides of the heating furnace body (6);
Characterized by further comprising:
a preheating furnace flue gas outlet pipe (8) is arranged on one side, far away from the steel taking machine (5), of the preheating furnace body (3), and a flue gas connecting pipe (9) is connected between the preheating furnace body (3) and the heating furnace body (6);
The preheating furnace comprises a preheating furnace body (3), wherein a preheating furnace flue gas inlet hole (11) is formed in one side of the bottom of the preheating furnace body (3), and a heating furnace flue gas outlet hole (10) is formed in one side of the bottom of the heating furnace body (6);
Wherein, a plurality of burners are arranged in the preheating furnace body (3) and the heating furnace body (6).
2. A multi-furnace heating furnace according to claim 1, wherein: the preheating furnace feeding roller ways (2) are uniformly provided with a plurality of first sliding grooves, the first sliding grooves are formed in the bottoms of the preheating furnace bodies (3), the furnace loading rack (1) is in sliding connection with the first sliding grooves, and the auxiliary roller ways (4) are used for discharging the preheating furnace bodies (3) and loading the heating furnace bodies (6).
3. A multi-furnace heating furnace according to claim 1, wherein: the heating furnace flue gas outlet hole (10) is communicated with the inside of the heating furnace body (6), and the heating furnace flue gas outlet hole (10) is in through connection with the flue gas connecting pipe (9).
4. A multi-furnace heating furnace according to claim 1, wherein: the preheating furnace flue gas inlet hole (11) is communicated with the interior of the preheating furnace body (3), and the preheating furnace flue gas inlet hole (11) is in through connection with the flue gas connecting pipe (9).
5. A multi-furnace heating furnace according to claim 1, wherein: the other side of the bottom of the preheating furnace body (3) is connected with a preheating furnace flue gas outlet hole (12), and the preheating furnace flue gas outlet hole (12) is in through connection with a preheating furnace flue gas outlet pipe (8).
6. A multi-furnace heating furnace according to claim 1, wherein: the bottom of the heating furnace body (6) is provided with a second chute, and the charging rack (1) is in sliding connection with the second chute.
7. A multi-furnace heating furnace according to claim 1, wherein: the auxiliary roller ways (4) and the heating furnace discharging roller ways (7) are all provided with a plurality of, and the charging rack (1) is in sliding connection with the preheating furnace feeding roller ways (2), the auxiliary roller ways (4) and the heating furnace discharging roller ways (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322381788.2U CN220887633U (en) | 2023-09-04 | 2023-09-04 | Multi-furnace body heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322381788.2U CN220887633U (en) | 2023-09-04 | 2023-09-04 | Multi-furnace body heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220887633U true CN220887633U (en) | 2024-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322381788.2U Active CN220887633U (en) | 2023-09-04 | 2023-09-04 | Multi-furnace body heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220887633U (en) |
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2023
- 2023-09-04 CN CN202322381788.2U patent/CN220887633U/en active Active
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