CN115466837B - Fire banking control method for furnace door of steel rolling heating furnace - Google Patents
Fire banking control method for furnace door of steel rolling heating furnace Download PDFInfo
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- CN115466837B CN115466837B CN202211024428.0A CN202211024428A CN115466837B CN 115466837 B CN115466837 B CN 115466837B CN 202211024428 A CN202211024428 A CN 202211024428A CN 115466837 B CN115466837 B CN 115466837B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 238000010438 heat treatment Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000005096 rolling process Methods 0.000 title claims abstract description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 185
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 93
- 238000002347 injection Methods 0.000 claims abstract description 44
- 239000007924 injection Substances 0.000 claims abstract description 44
- 238000010079 rubber tapping Methods 0.000 claims abstract description 34
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/70—Furnaces for ingots, i.e. soaking pits
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
-
- 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
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- 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)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Tunnel Furnaces (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention discloses a fire banking control method for a furnace door of a steel rolling heating furnace, relates to the technical field of industrial furnaces, and solves the technical problems of poor fire banking and damage to the outside of the furnace when the furnace door is opened in the related art. Comprises a nitrogen curtain injection device installed on a heating furnace, wherein the nitrogen curtain injection device comprises a W formed at a furnace door 1 The fire banking control method of the furnace door comprises a steel loading time sequence, a steel tapping time sequence and other time sequences when the furnace door is opened, wherein the steel loading time sequence and the steel tapping time sequence are kept normally open in other time sequences, and the nitrogen screen injection device is controlled to be opened and closed according to the established time sequences according to the working state of the furnace door of the heating furnace, so that the fire banking effect under the condition that the furnace door is opened is improved, the environmental temperature in front of the furnace door is reduced, the working environment of mechanical equipment outside the furnace is improved, and the equipment failure times are reduced. The nitrogen curtain spraying device can be opened and closed at any position, adverse effect of nitrogen on the upper surface temperature of the plate blank is avoided, and smooth operation of the heating furnace is maintained.
Description
Technical Field
The invention relates to the technical field of industrial furnaces, in particular to a furnace door fire banking control method of a steel rolling heating furnace.
Background
Some heating furnaces are provided with a fire-blocking wall on the basis of a roller way frame at the outer side of a furnace door and a roller way frame at the side of the furnace door, and a discharge end wall is added in the furnace. When the furnace door is opened, furnace gas and flame cannot be effectively blocked; when the furnace door is half-opened and fully-opened, high-temperature furnace gas in the furnace chamber inevitably overflows, so that the furnace outside is baked at high temperature in a short time.
Disclosure of Invention
The application provides a fire banking control method for a furnace door of a steel rolling heating furnace, which solves the technical problems of poor fire banking and damage to the outside of the furnace when the furnace door is opened in the related art.
The application provides a fire banking control method of furnace door of steel rolling heating furnace, including installing in the nitrogen curtain injection apparatus of heating furnace, nitrogen curtain injection apparatus includes total pipe ball valve, pneumatic trip valve, choke valve, hose and the nitrogen injection pipe that connects gradually, total pipe ball valve other end and air supply pipeline connection, and the nitrogen injection pipe is installed in the furnace door below of heating furnace to W that forms in furnace door department 1 Gas seal nitrogen curtain of +a width, W 1 The width of the furnace door is more than 0 and less than 200mm; the furnace door fire banking control method comprises a steel loading time sequence, a steel tapping time sequence and other time sequences when the furnace door is opened; the gas seal nitrogen curtain is kept normally open in other time sequences; in the steel loading time sequence, the advance stroke L of the steel loading machine 1 When the ratio is greater than A-a/2, the pneumatic cut-off valve is closed, and the steel charging machine continues to advance to L 1 Greater than A+W 1 Opening the pneumatic cut-off valve again in the process of +a/2+W, opening the pneumatic cut-off valve in other time, wherein A is the distance from the front edge of the slab to the furnace door, and W is the width of the slab; in the tapping time sequence, in the backward travel L of the tapping machine 2 Greater than L 0 -B-W 1 The pneumatic cut-off valve is closed when the steel tapping machine continues to advance to L 2 Greater than L 0 +W-B+W 1 Opening the pneumatic cut-off valve again at the time of/2+a/2, opening the pneumatic cut-off valve at other times, L 0 The distance from the laser detector to the center of the thickness of the furnace door is shown as B, and the distance from the slab to the laser detector is shown as B.
Optionally, the furnace door of the heating furnace comprises a furnace inlet and a furnace outlet.
Optionally, the furnace inlet and the furnace outlet are respectively provided with two groups of pneumatic shut-off valves, throttle valves, hoses and nitrogen injection pipes, one group of hoses is connected with the left end of the nitrogen injection pipe, the other group of hoses is connected with the right end of the nitrogen injection pipe, and the two groups of starting shut-off valves are connected with the same main pipe ball valve through pipelines.
Optionally, the pneumatic cut-off valve is connected with a steel charging and discharging program of the heating furnace through a signal wire, and automatic control interlocking of the pneumatic cut-off valve is realized through programming a control program.
Optionally, the hose is a metal hose, and the throttle valve is connected with the metal hose through a flange.
Alternatively, a chooses 100mm.
Alternatively, the diameter of the nitrogen sparge tube is selected to be 30-90mm.
Alternatively, the diameter of the nitrogen sparge tube was chosen to be 60mm.
Alternatively, the length of the nitrogen sparge tube is selected to be 4000-7000mm.
Alternatively, the length of the nitrogen sparge tube was selected to be 5660mm.
The beneficial effects of the application are as follows: the application provides a fire banking control method of a furnace door of a steel rolling heating furnace, which adopts a nitrogen curtain injection device, can form an air sealing nitrogen curtain when the furnace door of the heating furnace is opened, and controls the opening and closing of the nitrogen curtain injection device according to a set time sequence according to the working state of the furnace door of the heating furnace, thereby improving the fire banking effect under the opening of the furnace door, reducing the environmental temperature in front of the furnace door, improving the working environment of mechanical equipment outside the furnace, reducing the equipment failure times and prolonging the service life of equipment in front of the furnace; compared with other schemes for blocking high temperature influence by adopting a solid device, the solid device has the problems of rubbing and interference with actions of a steel loading machine and a steel tapping machine, and the method can solve the problems; the method can realize the opening and closing of the nitrogen curtain spraying device at any position, avoid the adverse effect of nitrogen on the upper surface temperature of the plate blank, and maintain the smooth work of the heating furnace.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention.
Fig. 1 is a schematic structural diagram of a nitrogen curtain spraying device in a method for controlling fire banking of a furnace door of a steel rolling heating furnace;
fig. 2 is a schematic diagram related to a steel loading time sequence in a furnace door fire banking control method of a steel rolling heating furnace;
fig. 3 is a schematic diagram related to tapping time sequence in a furnace door fire banking control method of a steel rolling heating furnace.
The drawings are marked: the device comprises a 1-main pipe ball valve, a 2-pneumatic cut-off valve, a 3-throttle valve, a 4-hose, a 5-nitrogen injection pipe, a 6-steel loading machine rod, a 7-furnace water beam, a 8-slab, a 9-laser detector position and a 10-steel tapping machine rod.
Detailed Description
According to the furnace door fire banking control method of the steel rolling heating furnace, the technical problems that fire banking is poor and damage is caused to the outside of the furnace when the furnace door is opened in the related art are solved.
The technical scheme in the embodiment of the application aims to solve the technical problems, and the overall thought is as follows:
a fire banking control method of furnace door of steel rolling heating furnace comprises a nitrogen curtain injection device arranged on the heating furnace, wherein the nitrogen curtain injection device comprises a main pipe ball valve, a pneumatic cut-off valve, a throttle valve, a hose and a nitrogen injection pipe which are sequentially connected, the other end of the main pipe ball valve is connected with an air source pipeline, and the nitrogen injection pipe is arranged below the furnace door of the heating furnace so as to form W at the furnace door 1 Gas seal nitrogen curtain of +a width, W 1 The width of the furnace door is more than 0 and less than 200mm; the fire banking control method of the furnace door comprises the step of loading steel when the furnace door is openedTiming, tapping timing, and other timings; the gas seal nitrogen curtain is kept normally open in other time sequences; in the steel loading time sequence, the advance stroke L of the steel loading machine 1 When the ratio is greater than A-a/2, the pneumatic cut-off valve is closed, and the steel charging machine continues to advance to L 1 Greater than A+W 1 Opening the pneumatic cut-off valve again in the process of +a/2+W, opening the pneumatic cut-off valve in other time, wherein A is the distance from the front edge of the slab to the furnace door, and W is the width of the slab; in the tapping time sequence, in the backward travel L of the tapping machine 2 Greater than L 0 -B-W 1 The pneumatic cut-off valve is closed when the steel tapping machine continues to advance to L 2 Greater than L 0 +W-B+W 1 Opening the pneumatic cut-off valve again at the time of/2+a/2, opening the pneumatic cut-off valve at other times, L 0 The distance from the laser detector to the center of the thickness of the furnace door is shown as B, and the distance from the slab to the laser detector is shown as B.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Referring to fig. 1, a fire banking control method for a furnace door of a steel rolling heating furnace includes a nitrogen curtain injection device installed on the heating furnace, the nitrogen curtain injection device includes a main pipe ball valve 1, a pneumatic cut-off valve 2, a throttle valve 3, a hose 4 and a nitrogen injection pipe 5 which are sequentially connected, the other end of the main pipe ball valve 1 is connected with an air source pipeline, the nitrogen injection pipe 5 is installed below the furnace door of the heating furnace to form a W at the furnace door 1 Gas seal nitrogen curtain of +a width, W 1 For the width of the oven door, 0 < a < 200mm, reference can be made to fig. 2 and 3.
The air seal nitrogen curtain can be formed by the nitrogen curtain spraying device when the furnace door of the heating furnace is opened, so that the environmental temperature in front of the furnace door is reduced, the working environment of mechanical equipment outside the furnace is improved, the equipment failure times are reduced, and the service life of equipment in front of the furnace is prolonged.
In the case of a heating furnace having a furnace door comprising a furnace inlet and a furnace outlet, as shown in fig. 1, the nitrogen curtain injection device comprises a nitrogen curtain injection device disposed at the furnace inlet and at the furnace outlet, respectively.
Optionally, the heating furnace is provided with two groups of pneumatic shut-off valves 2, throttle valves 3, hoses 4 and nitrogen injection pipes 5 at the furnace inlet, and is also provided with two groups of pneumatic shut-off valves 2, throttle valves 3, hoses 4 and nitrogen injection pipes 5 at the furnace outlet; the two groups of pneumatic shut-off valves 2 are connected with the same main pipe ball valve 1 through pipelines; as shown in figure 1, two groups of pneumatic shut-off valves 2 belonging to four groups of gas-operated shut-off valves in total at the furnace inlet and the furnace outlet are connected with the same main pipe ball valve 1 through pipelines. Two groups of hoses 4 are arranged at the furnace inlet for illustration, one group of hoses 4 is connected with the left end of the nitrogen injection pipe 5, and the other group of hoses 4 is connected with the right end of the nitrogen injection pipe 5, so that the sealing effect of the gas seal nitrogen curtain is enhanced and the uniformity of the gas seal nitrogen curtain is improved compared with the single-group arrangement.
Alternatively, the pneumatic cut-off valve 2 is connected with a steel charging and discharging program of the heating furnace through a signal wire, and automatic control interlocking of the pneumatic cut-off valve 2 is realized through programming a control program. The control of the nitrogen curtain injection device is summarized into the steel charging and discharging control of the heating furnace, and the control specifically comprises the nitrogen curtain opening and closing control during steel charging and tapping.
The fire banking control method of the furnace door comprises a steel loading time sequence, a steel tapping time sequence and other time sequences when the furnace door is opened. In other time sequences, the air seal nitrogen curtain is kept normally open, and air seal is maintained when the furnace door is opened.
In the steel loading sequence, referring to FIG. 2, FIG. 2 illustrates a nitrogen curtain region W with an air seal 1 +a, steel loading machine bar 6, water beam 7 in furnace and slab 8. In the advance stroke L of the steel loading machine 1 The pneumatic cut-off valve 2 is closed when the ratio A is greater than A-a/2, wherein A is the distance from the front edge of the slab 8 to the furnace door (specifically, the distance from the front edge of the slab 8 to the outer edge surface of the furnace door), and a/2 is the width of the air seal nitrogen curtain area on the inner side or the outer side of the furnace door, so that the nitrogen curtain is closed when the front edge of the slab 8 is just moved to the position right below the outer edge surface of the furnace door. Continuing to advance to L in the steel loading machine 1 Greater than A+W 1 The pneumatic shut-off valve 2, W is opened again at +a/2+W 1 For the width of the oven door, W is the width of the slab 8, so that the nitrogen curtain is opened just under the inner edge surface of the oven door when the trailing edge of the slab 8 passes right under. In the steel charging sequence, the pneumatic cut-off valve 2 is kept in an open state except the time point and other time when the slab 8 passes under the furnace door, namely, the gas seal nitrogen curtain is controlled to be opened。
In detail, the steel charging process is described in addition: (the furnace door at the furnace inlet is opened, the nitrogen curtain is opened) and the steel charging is started, the steel charging machine is advanced, and the advancing stroke L of the steel charging machine is calculated 1 When L 1 Closing the nitrogen curtain when the nitrogen curtain is larger than A-a/2, continuously advancing the steel loading machine, and obtaining the steel loading machine at L 1 Greater than A+W 1 And (5) starting the nitrogen curtain again when the ratio is +a/2+W, and continuing to move the steel loading machine until the steel loading machine is in place.
In the tapping sequence, referring to FIG. 3, FIG. 3 illustrates an area W with an air seal nitrogen curtain 1 +a, a tapping machine bar 10, an in-furnace water beam 7, a laser detector location 9, and two representative locations of the slab 8, by providing a laser detector in the furnace near the tapping hole. Backward travel L of steel tapping machine 2 Greater than L 0 -B-W 1 The pneumatic shut-off valve 2 is closed at the time of/2-a/2, L 0 B is the distance between the laser detector and the center of the thickness of the furnace door, and W is the distance between the slab 8 and the laser detector 1 For the width of the oven door, a/2 is the width of the zone of the gas seal nitrogen curtain inside or outside the oven door, so that the nitrogen curtain is closed when the leading edge of the slab 8 is about to move directly under the inner edge surface of the oven door. The tapping machine continues to advance to L 2 Greater than L 0 +W-B+W 1 The pneumatic shut-off valve 2 is again opened at/2+a/2, w being the width of the slab 8, so that the nitrogen curtain is opened just below the outer edge surface of the oven door when the trailing edge of the slab 8 passes directly under. In the tapping sequence, the pneumatic shut-off valve 2 is kept in the open condition, i.e. the gas seal nitrogen curtain is controlled to open, except at the above-mentioned point in time and at other times when the slab 8 is passing directly under the furnace door.
In detail, the tapping process is described in addition to: (the furnace door at the tapping position is opened, the nitrogen curtain is opened) tapping is started, the tapping machine is advanced, and the backward travel L of the tapping machine is calculated 2 At L 2 Greater than L 0 -B-W 1 Closing nitrogen curtain during 2-a/2, advancing the tapping machine, and at L 2 Greater than L 0 +W-B+W 1 And/2+a/2, opening the nitrogen curtain again, and continuing to advance the steel tapping machine until the steel tapping machine places the slab 8 at the center of the roller way.
In conclusion, when the furnace door of the heating furnace is opened through the nitrogen curtain injection device, an air seal nitrogen curtain can be formed, and the nitrogen curtain injection device is controlled to be opened and closed according to the operating state of the furnace door of the heating furnace and the set time sequence, so that the fire sealing effect under the condition that the furnace door is opened is improved, the ambient temperature in front of the furnace door is reduced by about 100 ℃, the operating environment of mechanical equipment outside the furnace is improved, the equipment failure times are reduced, and the service life of equipment in front of the furnace is prolonged.
Compared with other schemes for blocking high temperature influence by adopting a solid device, the solid device has the problems of rubbing and interference with actions of a steel loading machine and a steel tapping machine, and the method can solve the problems.
In addition, the method can realize the opening and closing of the nitrogen curtain spraying device at any position, avoid the adverse effect of nitrogen on the upper surface temperature of the slab 8, and maintain the smooth operation of the heating furnace.
The above W 1 Schematically indicated by the width of the oven door, according to FIGS. 2 and 3, W in the conventional sense 1 May also be described as the thickness of the oven door.
Alternatively, the hose 4 is provided as a metal hose, with which the throttle valve 3 is connected by means of a flange.
The above definition is 0 < a < 200mm, a is optionally 50mm, 75mm, 100mm, 125mm, 150mm. The inventor determines that a is preferably 100mm, i.e. W is formed at the oven door, based on practical operation experience 1 An air seal nitrogen curtain of +100mm width.
In one embodiment, taking a steel-moving 1580 heating furnace as an example, a single-seat heating furnace is divided into a furnace inlet and a furnace outlet, each furnace inlet is provided with a left furnace door and a right furnace door, the furnace doors finish lifting actions of the furnace doors through a hydraulic cylinder lifting mechanism, the action stroke 2050mm is realized, the length of each furnace door is 5760mm, the height 2510mm and the thickness 320mm, a nitrogen injection pipe 5 is selected to have the diameter of 60mm and the length of 5660mm, the nitrogen injection pipe 5 is connected through a flange hose, follow-up with the furnace doors is finished, and the nitrogen flow of an access point is 600Nm 3 And/h, the pressure of an access point is 0.3Mpa, a nitrogen injection pipe 5 is arranged right below a single furnace door, and the opening and closing actions are realized through a pneumatic cut-off valve 2.
In other embodiments, the diameter of the nitrogen sparge tube 5 may be selected in the range of 30-90mm.
In other embodiments, the length of the nitrogen sparge pipe 5 can be chosen to be 4000-7000mm, the length of the nitrogen sparge pipe 5 being set with reference to the length of the oven door.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. The fire banking control method of the furnace door of the steel rolling heating furnace is characterized by comprising a nitrogen curtain injection device arranged on the heating furnace, wherein the nitrogen curtain injection device comprises a main pipe ball valve, a pneumatic cut-off valve, a throttle valve, a hose and a nitrogen injection pipe which are sequentially connected, the other end of the main pipe ball valve is connected with an air source pipeline, and the nitrogen injection pipe is arranged below the furnace door of the heating furnace so as to form W at the furnace door 1 Gas seal nitrogen curtain of +a width, W 1 The width of the furnace door is more than 0 and less than 200mm, the furnace door of the heating furnace comprises a furnace inlet and a furnace outlet, and the nitrogen curtain spraying device is respectively arranged at the furnace inlet and the furnace outlet;
the furnace door fire banking control method comprises a steel loading time sequence, a steel tapping time sequence and other time sequences when the furnace door is opened; the gas seal nitrogen curtain is kept normally open in the other time sequences;
in the steel loading time sequence, the steel loading machine advances by a stroke L 1 When the ratio is greater than A-a/2, the pneumatic cut-off valve is closed, and the steel charging machine continues to advance to L 1 Greater than A+W 1 Opening the pneumatic cut-off valve again in the process of +a/2+W, wherein the pneumatic cut-off valve is opened in other time, A is the distance from the front edge of the slab to the furnace door, and W is the width of the slab;
in the tapping time sequence, in a tapping machineBack-off process L 2 Greater than L 0 -B-W 1 The pneumatic shut-off valve is closed at the time of/2-a/2, and the tapping machine continues to advance to L 2 Greater than L 0 +W-B+W 1 Opening the pneumatic cut-off valve again in the time of/2+a/2, opening the pneumatic cut-off valve in other time, arranging a laser detector at a position close to the furnace outlet in the furnace, and L 0 B is the distance between the laser detector and the center of the thickness of the furnace door, and B is the distance between the slab and the laser detector;
the pneumatic cut-off valve is connected with a steel charging and discharging program of the heating furnace through a signal wire, and automatic control interlocking of the pneumatic cut-off valve is realized through programming a control program;
the two groups of pneumatic shut-off valves, the throttle valve, the hoses and the nitrogen injection pipes are arranged at the furnace inlet and the furnace outlet, one group of hoses is connected with the left end of the nitrogen injection pipe, the other group of hoses is connected with the right end of the nitrogen injection pipe, and meanwhile, the two groups of pneumatic shut-off valves are connected with the same main pipe ball valve through pipelines.
2. The oven door banking control method according to claim 1, characterized in that the hose is provided in the form of a metal hose, and that the throttle valve is connected to the metal hose by means of a flange.
3. The oven door banking control method according to claim 1, characterized in that a is chosen to be 100mm.
4. The oven door banking control method according to claim 1, characterized in, that the diameter of the nitrogen injection tube is selected from 30-90mm.
5. The oven door banking control method according to claim 4, characterized in, that the diameter of the nitrogen injection tube is selected to be 60mm.
6. The oven door banking control method according to claim 1, characterized in, that the length of the nitrogen injection tube is selected to be 4000-7000mm.
7. The oven door banking control method according to claim 6, characterized in, that the length of the nitrogen injection tube is selected to 5660mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211024428.0A CN115466837B (en) | 2022-08-25 | 2022-08-25 | Fire banking control method for furnace door of steel rolling heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211024428.0A CN115466837B (en) | 2022-08-25 | 2022-08-25 | Fire banking control method for furnace door of steel rolling heating furnace |
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| CN115466837A CN115466837A (en) | 2022-12-13 |
| CN115466837B true CN115466837B (en) | 2023-12-26 |
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| CN108225036A (en) * | 2018-01-23 | 2018-06-29 | 中钢集团鞍山热能研究院有限公司 | A kind of heating-furnace implication seal apparatus and sealing gland method |
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| CN213172477U (en) * | 2020-09-23 | 2021-05-11 | 重庆赛迪热工环保工程技术有限公司 | Roller-hearth heat treatment furnace door nitrogen sealing device heated by radiant tube |
| CN113774207A (en) * | 2021-08-31 | 2021-12-10 | 北京科技大学设计研究院有限公司 | Method for controlling protective atmosphere in radiant tube heat treatment furnace |
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