CN113061824A - Furnace nose system - Google Patents
Furnace nose system Download PDFInfo
- Publication number
- CN113061824A CN113061824A CN202110408218.0A CN202110408218A CN113061824A CN 113061824 A CN113061824 A CN 113061824A CN 202110408218 A CN202110408218 A CN 202110408218A CN 113061824 A CN113061824 A CN 113061824A
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- Prior art keywords
- furnace nose
- furnace
- pipeline
- nitrogen
- zinc
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
The utility model provides a furnace nose system, the chute body lower part of furnace nose body is furnace nose tip, installs liquid level height detecting unit on the furnace nose tip, and chute body bilateral symmetry installation actuating mechanism, actuating mechanism connect the elevator group respectively, and the dross delivery outlet of furnace nose tip lower extreme passes through the pipeline and connects the dross discharge port, installs the scum pump on the pipeline. The invention monitors the position of the zinc liquid level in real time, adjusts the posture of the furnace nose in a follow-up manner, ensures that the surface of the zinc liquid in the furnace nose is always in a non-impurity state, and improves the finish degree and quality grade of the surface of the strip steel; by injecting nitrogen into the furnace nose, the gas in the furnace nose is continuously filtered on line, the purity degree and the particulate matter content of the atmosphere are controlled, the good atmosphere state in the furnace nose is realized, and a zinc oxide layer on the surface of the zinc liquid is reduced; the generated zinc liquid scum is discharged to the outside of the furnace nose in real time through a pump set and an output pipeline which are arranged on the slag discharge furnace nose, so that the quality problem of the strip steel caused by the scum is reduced to the minimum.
Description
Technical Field
The invention relates to the technical field of hot-dip galvanizing of plates.
Background
In the hot dip galvanizing process, the surface of the molten zinc inside the furnace nose is usually covered with a zinc oxide layer due to the reaction between the atmosphere inside the furnace nose and the zinc in the molten zinc and iron powder produced by the dissolution of the surface layer of the steel strip. These matte particles, which have a density lower than that of liquid zinc, rise to the surface of the zinc bath, forming a scum layer common to zinc baths. This results in the adhesion and entrainment of particulate matter as the steel strip passes over the surface of the molten zinc. The carried impurities are immersed into the zinc liquid along with the strip steel, and the visual defect of the strip steel is generated after the liquid is discharged by the galvanizing process.
Various solutions have been proposed for removing zinc particles and matt objects on the surface of the zinc bath. The conventional solution is to clean the surface of the zinc bath by extracting zinc oxide and matt objects from the furnace nose. The operation mode of the pump delivery greatly reduces the slag deposit quantity on the surface of the zinc liquid, and has obvious use effect.
There are certain limitations to this pumping approach. When the strip steel is continuously produced in the production line, the zinc liquid can be gradually consumed along with the surface process requirement of the strip steel, and the height of the zinc liquid can be gradually reduced along with the change of the production line speed and the coating. When the height of the zinc liquid is lower than the process requirement of the zinc slag pumping system, the slag discharging system fails.
Therefore, under the condition of zinc liquid level change, the normal operation of the furnace nose slag discharging system is still maintained, which is a practical problem to be solved.
Disclosure of Invention
In order to solve the above problems of the conventional technology for removing zinc particles and matt objects on the surface of the zinc bath, the invention provides a furnace nose system.
The technical scheme adopted by the invention for realizing the purpose is as follows: the utility model provides a furnace nose system, 8 lower parts of chute body of furnace nose body 20 are furnace nose tip 7, install liquid level detection unit 11 on furnace nose tip 7, actuating mechanism 12 is installed to 8 bilateral symmetry of chute body, actuating mechanism 12 connects elevator group 9 respectively, dross delivery outlet 22 of furnace nose tip 7 lower extreme passes through pipeline connection dross discharge port 22, install the scum pump on the pipeline, height difference is measured to liquid level detection unit 11, elevator group 9 drives furnace nose tip 7 and goes up and down along with the altitude variation of dross height plane 6, the dross in the furnace nose tip 7 is discharged outside the furnace nose by dross discharge port 21 through dross delivery outlet 22.
The chute body 8 is connected with a nitrogen input pipeline and a nitrogen output pipeline, the nitrogen input pipeline and the nitrogen output pipeline are connected with the circulating filtering and heating unit 17, nitrogen in the nitrogen output pipeline is pumped out by a fan and flows through the circulating filtering and heating unit 17, and the filtered nitrogen is conveyed to the heating furnace through the nitrogen input pipeline again; the nitrogen gas in the input pipeline flows through the circulating filtering heating unit 17, is reheated to the use temperature by the heater, and is input into the inner cavity of the furnace nose.
A slag discharging bottom plate 23 is arranged in the end part 7 of the furnace nose, a slag discharging wave plate 24 is arranged at the upper part of the slag discharging bottom plate 23, one end of the slag discharging bottom plate 23 is connected with a zinc slag outlet pipeline 26,
the upper part of the chute body 8 is connected with an expansion joint 10.
The furnace nose system monitors the position and the state of the zinc liquid level in real time, adjusts the posture of the furnace nose in a follow-up manner, realizes continuous and accurate slag discharge operation, ensures that the surface of the zinc liquid in the furnace nose is always in an impurity-free state, and realizes the improvement of the finish degree and the quality grade of the surface of strip steel; by injecting nitrogen into the furnace nose, the gas in the furnace nose is continuously filtered on line, the purity degree and the particulate matter content of the atmosphere are controlled, the good atmosphere state in the furnace nose is realized, and a zinc oxide layer on the surface of the zinc liquid is reduced; the generated zinc liquid scum is discharged to the outside of the furnace nose in real time through a pump set and an output pipeline which are arranged on the slag discharge furnace nose, so that the quality problem of the strip steel caused by the scum is reduced to the minimum.
Drawings
FIG. 1 is a schematic view of the furnace nose subsystem of the present invention.
FIG. 2 is a rear view of the furnace nose subsystem of the present invention.
FIG. 3 is a schematic view of furnace nose position adjustment for the furnace nose subsystem of the present invention.
FIG. 4 is a diagram of a furnace nose slagging mechanism of the furnace nose subsystem of the present invention.
As shown in the figure: 1. the zinc pot comprises a zinc pot air knife, 2, a first zinc pot roller, 3, a second zinc pot roller, 4, a third zinc pot roller, 5, strip steel, 6, a zinc liquid height plane, 7, a furnace nose end part, 8, a chute body, 9, a lifting unit, 10, an expansion joint, 11, a liquid level detection unit, 12, a driving mechanism, 13, a first nitrogen input pipeline, 14, a first nitrogen output pipeline, 15, a second nitrogen input pipeline, 16, a third nitrogen input pipeline, 17, a circulating filtering and heating unit, 18, a second nitrogen output pipeline, 19, a fourth nitrogen input pipeline, 20, a furnace nose body, 21, a zinc slag discharge port, 22, a zinc slag output port, 23, a slag discharge bottom plate, 24, a slag discharge wave plate, 25, a zinc liquid actual liquid level, 26 and a zinc slag outlet pipeline.
Detailed Description
As shown in figures 1 and 2, the furnace nose system of the invention is characterized in that the lower part of a chute body 8 of a furnace nose is a furnace nose end part 7, the upper part of the chute body 8 is connected with an expansion joint 10, a liquid level height detection unit 11 is arranged on the furnace nose end part 7, driving mechanisms 12 are symmetrically arranged on two sides of the chute body 8, and the driving mechanisms 12 are respectively connected with a lifting unit 9. The chute body 8 is connected with a nitrogen input pipeline and a nitrogen output pipeline, and the nitrogen input pipeline and the nitrogen output pipeline are connected with a circulating filtering and heating unit 18.
The production line strip steel 5 finishes the heating process from the heating furnace, enters the chute body 8 through the expansion joint 10, enters the lower part of the zinc liquid height plane 6 through the furnace nose end part 7, turns to the zinc pot from the third zinc pot roller 4, the second zinc pot roller 3 and the first zinc pot roller 2, and finishes the whole galvanizing process after being blown and controlled by the zinc pot air knife 1.
In the production process, the zinc liquid level 6 fluctuates, and the phenomenon of liquid level falling or short-time rising occurs. The height change is detected in real time through the liquid level height detection unit 11, the chute body 8 is controlled to lift through the driving mechanism 12 driven by the lifting unit 9, the expansion joint 10 and the connecting mechanism are correspondingly deformed, and the furnace nose end part 7 is always kept at an optimal height position so as to ensure the horizontal use requirement of the furnace nose head. When the zinc liquid level 18 fluctuates, the detection unit measures the actual height difference value, the height lifting unit is driven to react in time after the system calculation, and the height difference value automatically follows the height change of the zinc liquid level 6, so that the zinc liquid level can seal the galvanizing cavity at any time.
As shown in figure 3, a liquid level height detection unit 11 is arranged in the furnace nose end part 7, when the theoretical zinc liquid level 6 fluctuates, the furnace nose gradually rises along with the descending of the zinc liquid level (see an adjustment position 1), the slag discharging device is gradually adjusted to (an adjustment position 2), and finally (a working position), the liquid level height detection unit 11 measures an actual height difference value, namely an actual liquid level 25, the actual liquid level 25 is driven to react in time by a driving height lifting unit 9 after system calculation, and the actual liquid level 25 is automatically adjusted to the working position along with the height change of the zinc liquid level 25.
The zinc dross is discharged to the external area of the furnace nose through a zinc dross discharge port 21 and a pump set by the deslagging mechanism through a zinc dross output port 22, the deslagging mechanism guides the zinc dross into the mechanism through an arc concave surface between a deslagging wave plate wave crest 28 and a deslagging wave plate wave trough 27, and the zinc dross passes through a zinc dross output port 25 and a zinc dross outlet pipeline 26.
Continuous and accurate slag discharge operation is realized through the self-checking and follow-up functions of the equipment, so that the surface of the zinc liquid in the furnace nose is always in a non-impurity state, and the smoothness and quality grade of the surface of the strip steel are improved.
The generated zinc liquid scum is discharged to the outside of the furnace nose in real time through a pump set and an output pipeline which are arranged on the slag discharge furnace nose, so that the quality problem of the strip steel caused by the scum is reduced to the minimum.
The zinc liquid in the furnace nose has a certain evaporation capacity, and after zinc ash rises and is mixed with hot nitrogen, the quality of the strip steel is affected, so that the atmosphere in the furnace nose needs to be cleaned and discharged in time. When the atmosphere containing impurities in the furnace nose is exhausted to the outside of the furnace nose, pure nitrogen is required to be quantitatively supplemented inwards, and the nitrogen is heated and then injected into the cavity again. The nitrogen gas in the first nitrogen gas output pipeline 14 and the second nitrogen gas output pipeline 18 is pumped out by the fan, flows through the filtering/heating unit 17, is automatically subjected to atmosphere filtering by the filtering system, intercepts and precipitates large-particle impurities, and the filtered atmosphere is sent into the heating furnace again for use. The nitrogen gas of the first, second, third and fourth nitrogen gas input lines 13, 15 and fourth nitrogen gas input lines flows through the filtering/heating unit 17, is reheated to a use temperature by a heater, and is input to the inner cavity of the furnace nose. Through the inside atmosphere of extraction stove nose, realize the inside gas of online continuous filtration stove nose, reach the purity degree and the particulate matter content of control atmosphere, realize the inside good atmosphere state of stove nose.
Claims (4)
1. A furnace nose system characterized by: furnace nose tip (7) is in chute body (8) lower part of furnace nose body (20), installation liquid level height detecting element (11) on furnace nose tip (7), actuating mechanism (12) are installed to chute body (8) bilateral symmetry, actuating mechanism (12) are connected elevator group (9) respectively, dross delivery outlet (22) of furnace nose tip (7) lower extreme pass through pipeline connection dross discharge port (22), height difference is measured in liquid level height detecting element (11), elevator group (9) drive furnace nose tip (7) follow the altitude variation of dross height plane (6) and go up and down, the dross in furnace nose tip (7) is discharged outside the furnace nose by dross discharge port (21) through dross delivery outlet (22).
2. The furnace nose system of claim 1, wherein: the chute body (8) is connected with a nitrogen input pipeline and a nitrogen output pipeline, the nitrogen input pipeline and the nitrogen output pipeline are connected with a circulating filtering and heating unit (17), nitrogen in the nitrogen output pipeline is pumped out by a fan and flows through the circulating filtering and heating unit (17), and the filtered nitrogen is conveyed to the heating furnace through the nitrogen input pipeline again; the nitrogen gas in the input pipeline flows through the circulating filtering heating unit (17), is reheated to the use temperature by the heater and is input into the inner cavity of the furnace nose.
3. The furnace nose system of claim 2, wherein: a slag discharging bottom plate (23) is arranged in the end part (7) of the furnace nose, a slag discharging wave plate (24) is arranged at the upper part of the slag discharging bottom plate (23), and one end of the slag discharging bottom plate (23) is connected with a zinc slag outlet pipeline (26).
4. The furnace nose system of claim 2, wherein: the upper part of the chute body (8) is connected with an expansion joint (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110408218.0A CN113061824A (en) | 2021-04-16 | 2021-04-16 | Furnace nose system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110408218.0A CN113061824A (en) | 2021-04-16 | 2021-04-16 | Furnace nose system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113061824A true CN113061824A (en) | 2021-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110408218.0A Pending CN113061824A (en) | 2021-04-16 | 2021-04-16 | Furnace nose system |
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| Country | Link |
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| CN (1) | CN113061824A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855108A (en) * | 2022-05-24 | 2022-08-05 | 山东钢铁集团日照有限公司 | Control method for surface plating leakage and zinc ash defects of high-aluminum-silicon-manganese galvanized dual-phase steel |
-
2021
- 2021-04-16 CN CN202110408218.0A patent/CN113061824A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855108A (en) * | 2022-05-24 | 2022-08-05 | 山东钢铁集团日照有限公司 | Control method for surface plating leakage and zinc ash defects of high-aluminum-silicon-manganese galvanized dual-phase steel |
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