CN105506661B - A kind of emergency stop processing method of steel band descaling bath - Google Patents
A kind of emergency stop processing method of steel band descaling bath Download PDFInfo
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- CN105506661B CN105506661B CN201510928609.XA CN201510928609A CN105506661B CN 105506661 B CN105506661 B CN 105506661B CN 201510928609 A CN201510928609 A CN 201510928609A CN 105506661 B CN105506661 B CN 105506661B
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- descaling bath
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/021—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by dipping
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/025—Details of the apparatus, e.g. linings or sealing means
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of emergency stop processing methods of steel band descaling bath, belong to steel band pickling technical field.The present invention the following steps are included: one, the pickling solution in descaling bath is discharged to and is deposited in sour pond, when there is hang-up in descaling bath, open acid tube, the pickling solution in descaling bath is discharged into deposit in sour pond and is kept in；Two, adjustment is repaired to descaling bath, is allowed to restore normal；Three, the pickling solution deposited in sour pond is flowed back into descaling bath, after step 2, the pickling solution deposited in sour pond is withdrawn into descaling bath by kinetic pump, normal pickling is continued to the steel band in descaling bath.According to the technical solution of the present invention it is possible to prevente effectively from equipment downtime is influenced caused by steel band, and the leakage and waste of pickling solution can be prevented, save production cost.
Description
Technical field
The present invention relates to steel band pickling technical fields, more specifically to a kind of emergency stop processing side of steel band descaling bath
Method.
Background technique
Steel band generally requires before entering cold rolling process and first passes through pickling processes, because steel band is in wet environment at present
In be easy to happen oxidation, there is one layer of thicker oxidation film on surface, cause its finished product discoloration it is more obvious, seriously affect steel band production
The quality and beauty of product, the main purpose of pickling are effective impurity for removing steel strip surface.If steel band pickling is not thorough, a side
Face directly results in impurity in manufacturing process and is pressed into steel strip surface, influences the quality of cold-rolled products；On the other hand to lower road Cold-roller
The gloss level of roll of sequence and emulsion service life adversely affect.Therefore preceding working procedure as cold rolling, pickling process is to closing again
It wants.
Pickling process is usually that steel band first passes through descaling bath pickling and then passes through washing and brushing device and scrubbed in the prior art,
The impurity of steel strip surface is brushed away, is then cleaned by service sink, however during descaling bath continuous acid-washing, due to various reasons
Equipment is easy to appear shutdown phenomenon, and steel band residence time in pickling solution too long surface that will lead to deposits a large amount of impurity at this time；And
It is easy to produce the pollution problems such as a large amount of acid mists, waste liquid in pickling, makes surrounding enviroment and equipment by different degrees of corrosion, it is adjoint
The continuous of technology promote and the continuous enhancing of environmental consciousness, steel band descaling bath are badly in need of being further improved.
About the technological improvement of steel band descaling bath, has related patents in the prior art and disclose, such as Chinese patent application
Number: 2013205907586, the applying date is on September 24th, 2013, invention and created name are as follows: a kind of steel band derusting pickling line, the Shen
Please case be related to a kind of steel band derusting pickling line, including descaling bath and Rinsing Area, be equipped with acid fog absorption tower and correspondence above descaling bath
The stone roll slot cover of stone roll, top is equipped with excessive acid tank cover between descaling bath and Rinsing Area, and excessive acid tank cover is connect with stone roll slot cover
Place, stone roll slot cover and acid fog absorption tower junction are equipped with groove, and clear water is marked in groove, and this application will by water seal
Acid mist is enclosed in descaling bath, thus so that acid mist is leaked outside, but this application can only reduce acid mist leaking into air, it cannot
Steel band is protected in equipment downtime, and can not solve that pickling solution caused by pickling solution is evaporate into groove wastes asks
Topic, requires further improvement.
Summary of the invention
Technical problems to be solved by the inivention
The present invention is for the readily volatilized waste of pickling solution in pickling line in the prior art and the easy depositing contaminants of steel strip surface
Deficiency provides a kind of emergency stop processing method of steel band descaling bath, it is possible to prevente effectively from influencing caused by equipment downtime, and reduces
The waste of pickling solution improves pickling environment to reduce production cost.
Technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of emergency stop processing method of steel band descaling bath of the invention, comprising the following steps:
Step 1: the pickling solution in descaling bath is discharged to and is deposited in sour pond；
When there is hang-up, acid tube is opened, the pickling solution in descaling bath is discharged into deposit in sour pond and is kept in；
Wherein the descaling bath includes pressure roller I, pressure roller II, pickling tube, acid tank cover, squeeze roller, drying air knife and emergency stop dress
It sets, the pressure roller I and pressure roller II are separately positioned on the entrance and exit position of descaling bath, and steel band is pressed by pressure roller I and pressure roller II
In pickling solution in pickling tube, wherein the outlet port of descaling bath is also disposed with squeeze roller and drying air knife；
More than two pickling tubes is provided in descaling bath, the lower part of adjacent pickling tube is connected, in pickling tube side wall
Outside is provided with sealing structure, including the sealing side wall being fixedly connected with pickling tube side wall, the sealing side wall and pickling tube side wall
Between the groove that is formed be water sealed tank；Acid tank cover is stamped above each pickling tube；
The emergency stop device is arranged in the side of descaling bath, including acid tube, deposits sour pond and acid inlet tube, acid tube and into acid
The both ends of pipe respectively with pickling tube and deposit sour pond and be connected, kinetic pump is provided on acid inlet tube；
Step 2: repairing adjustment to descaling bath, is allowed to restore normal；
After step 1, on-call maintenance is carried out to descaling bath, is allowed to restore normal operating conditions；
Step 3: the pickling solution deposited in sour pond is flowed back into descaling bath；
After step 2, the pickling solution deposited in sour pond is flowed back into descaling bath through acid inlet tube by kinetic pump, to acid
Steel band in washing trough continues normal acid cleaning process.
Further, the acid tank cover includes inner wall, outer wall, upper cover and deflector, and inner wall is located at below upper cover, and is connected
In the surrounding position of upper cover, inner wall and upper cover form a hollow cavity, and inner wall is placed in above-mentioned water sealed tank；Outer wall is set
It sets in the outside of inner wall, and is in contact with the upper surface of sealing side wall；The medial surface of upper cover is also fixed with deflector along surrounding, institute
The inside that deflector is located at inner wall is stated, and deflector is tilted to upper cover centre, so that deflector and pickling tube side wall is interior
Side is in contact, and the angle between deflector and pickling tube side wall is α, and α is acute angle.
Further, the acid tank cover further includes stiffening plate, and wherein upper cover is arcuate structure, and the stiffening plate is arranged upper
The center of lid medial surface, and the both ends of stiffening plate are fixedly connected with deflector respectively.
Further, the explosionproof hole through its thickness is offered on the upper lid.
Further, the size of the angle α is 15 ~ 30 °.
Further, it is additionally provided with acid mist purifying device above the descaling bath, is set gradually in the acid mist purifying device
There are cooling zone, a neutral zone, secondary neutral zone and demister device.
Beneficial effect
Using technical solution provided by the invention, compared with prior art, there is following remarkable result:
(1) side of the descaling bath in the present invention is provided with emergency stop device, including acid tube, deposits sour pond and acid inlet tube, arranges
The both ends of acid tube and acid inlet tube respectively with pickling tube and deposit sour pond and be connected, when cancel closedown occurs in equipment, open acid tube,
Pickling solution in pickling tube is discharged into deposit in sour pond and is kept in, when equipment returns to normal production, acid inlet tube passes through power
Pump drives and the pickling solution deposited in sour pond is withdrawn into pickling tube, and steel band continues acid cleaning process；The device of the emergency stop device
Steel band can be avoided the occurrence of due to too long in the pickling section residence time, in steel strip surface depositing contaminants, following process leads to steel band
The phenomenon that showing nigrescence or jaundice is conducive to the surface quality for improving steel band.
(2) the pickling tube side-wall outer side in the present invention is provided with sealing structure, close including being fixedly connected with pickling tube side wall
Side wall is sealed, sealing the groove formed between side wall and pickling tube side wall is water sealed tank, the injected clear water in the water sealed tank, each acid
Acid tank cover is stamped above wash pool, and the inner wall of acid tank cover is placed in water sealed tank, the clear water in water sealed tank will be in pickling tube
Portion is fully sealed with the external world, and the pickling solution inside pickling tube can be effectively prevent, to external diffusion, to avoid pickling due to by thermal evaporation
The pollution of liquid pair and external environment.
(3) deflector is provided on the upper lid in the present invention, and deflector is tilted to upper cover centre, by acid tank cover lid
When above pickling tube, inner wall is located in water sealed tank, and deflector is in contact on the inside of pickling tube side wall just, i.e., by pickling
Obstructed completely between pond side wall and water sealed tank, after acid mist liquefaction when flowing back along upper cover, can because the blocking of deflector and can not
Into water sealed tank, so that the smooth surface along deflector all flows back into pickling tube, the expansion of pickling solution is further avoided
It dissipates and wastes.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of descaling bath in the present invention；
Fig. 2 is the structural schematic diagram of pickling tube in the present invention.
Label declaration in schematic diagram: 2, acid mist purifying device；3, pressure roller I；4, acid tank cover；6, pressure roller II；8, squeeze roller；9,
Drying air knife；401, inner wall；402, outer wall；403, upper cover；404, deflector；405, stiffening plate；501, pickling tube；502, water seal
Slot；503, pickling tube side wall；504, side wall is sealed.
Specific embodiment
To further appreciate that the contents of the present invention, the present invention is described in detail with reference to the accompanying drawings and examples.
Embodiment 1
As depicted in figs. 1 and 2, the steel band descaling bath in the present embodiment includes pressure roller I 3, pressure roller II 6, pickling tube 501, acid
Slot cover 4, squeeze roller 8, drying air knife 9 and emergency stop device, wherein pressure roller I 3 and pressure roller II 6 be separately positioned on descaling bath entrance and
Steel band is pressed into the pickling solution in pickling tube 501 by outlet port, pressure roller I 3 and pressure roller II 6, so that steel band is constantly being transported forward
It is acid washed liquid always during dynamic to be completely soaked, realizes acid cleaning process；The outlet port of descaling bath is also disposed with squeeze roller 8
With drying air knife 9, the steel strip surface after pickling adheres to one layer of pickling solution, and steel band leads between the up-down rollers of squeeze roller 8 first
It crosses, this is extracted surface acid-washing liquid-based, then is further purged by drying air knife 9 to remaining pickling solution.
More than two pickling tubes 501 is provided in descaling bath, the lower part of adjacent pickling tube 501 is connected, steel band acid
Be to be pierced by pickling tube 501 when washing, be provided with sealing structure on the outside of pickling tube side wall 503, including with pickling tube side wall
The 503 sealing side walls 504 being fixedly connected with, sealing the groove formed between side wall 504 and pickling tube side wall 503 is water sealed tank 502,
501 inside of pickling tube is fully sealed with the external world for injected clear water in the water sealed tank 502, the clear water in water sealed tank 502, can be effective
Prevent the pickling solution inside pickling tube 501 from, to external diffusion, avoiding pollution of the pickling solution pair with external environment due to by thermal evaporation；
It is stamped acid tank cover 4 in each 501 top of pickling tube.
Acid tank cover 4 includes inner wall 401, outer wall 402, upper cover 403 and deflector 404, and inner wall 401 is located at 403 lower section of upper cover,
And it is connected in the surrounding position of upper cover 403, inner wall 401 and upper cover 403 form a hollow cavity, in order to reduce pickling to the greatest extent
The height of heat diffusion in pond 501, the small volume of the hollow cavity, upper cover 403 is lower；Inner wall 401 is placed on water seal
In slot 502；The outside of inner wall 401 is arranged in outer wall 402, and is in contact with the upper surface of sealing side wall 504；Upper cover 403 it is interior
Side is also fixed with deflector 404 along surrounding, and deflector 404 is located at the inside of inner wall 401, and deflector 404 is into upper cover 403
The inclination of center portion position so that deflector 404 is in contact with the inside of pickling tube side wall 503, the design of the deflector 404 be in order into
One step prevents the leakage of pickling solution and evaporation from wasting.
When pickling pickling solution because temperature influence will form acid mist, acid mist is gathered and can be liquefied again below upper cover 403, along
The medial surface of upper cover 403 flows back into pickling tube 501, and upper cover 403 is arcuate structure, is more advantageous to the reflux of pickling solution；But skill
Art personnel have found that the part pickling solution after liquefaction can finally flow back into water sealed tank 502 along upper cover 403 during long-term production
In, gradually the clear water in water sealed tank 502 is acidified, the wasting of resources of pickling solution is also resulted in, improves production cost；To avoid
This phenomenon, technical staff are creatively added to the design of deflector 404, which is arranged in the inside of inner wall 401, and
Deflector 404 is tilted to 403 centre of upper cover, and when acid tank cover 4 is covered above pickling tube 501, inner wall 401 is located at water sealed tank
In 502, and deflector 404 is in contact with the inside of pickling tube side wall 503 just, i.e., by pickling tube side wall 503 and water sealed tank 502
Between obstruct completely, acid mist liquefaction after along upper cover 403 flow back when, can because deflector 404 blocking and cannot be introduced into water seal
Slot 502 avoids diffusion and the wave of pickling solution so that the smooth surface along deflector 404 all flows back into pickling tube 501
Take.Angle between the deflector 404 and pickling tube side wall 503 is that α (is specifically deflector 404 and longitudinal vertical line in Fig. 2
Between angle be α, the longitudinal direction vertical line is parallel with pickling tube side wall 503), the effect that the size of α flows back for pickling solution
Tool has a certain impact, if α is excessive, will lead to excessive by resistance and speed is excessively slow in pickling solution reflux, if α is too small and is unfavorable for
The cooperation of entire acid tank cover 4 and pickling tube 501 leads to cover being limited with the movement opened；Technical staff is by continuous experiment
Grope, finally found that when α is 15 ~ 30 ° most useful for production and application, neither influence the back-flow velocity of pickling solution, is also conducive to entire
The cooperation of acid tank cover 4 and pickling tube 501, specifically α is 15 ° in the present embodiment.
For the structural strength for reinforcing acid tank cover 4, in the center of 403 medial surface of the upper cover setting stiffening plate 405, and add
The both ends of strong plate 405 are fixedly connected with deflector 404 respectively.The explosionproof hole through its thickness is offered in upper cover 403, steel band is in acid
A small amount of hydrogen may be displaced because there is chemical reaction during washing, hydrogen is assembled in pickling tube 501 excessively to be then easy to lead
Cause safety accident, in order to improve production security, technical staff has opened up explosionproof hole in upper cover 403, the explosion-proof pore size compared with
It is small, the hydrogen of generation can be discharged at any time, and not will lead to a lot of leakage of acid mist.
It is additionally provided with acid mist purifying device 2 above descaling bath, cooling zone, primary neutralization are disposed in acid mist purifying device 2
Area, secondary neutral zone and demister device, the present invention in be provided with two groups of acid mist purifying devices 2 altogether, respectively in the entrance of descaling bath
And outlet port, the acid mist of entrance first pass around cooling zone and liquefy, then pass through a neutral zone and secondary neutral zone respectively
Acid-base neutralization is carried out, is finally filtered by demister, clean gas is discharged.
A kind of emergency stop processing method of steel band descaling bath of the present embodiment is realized by emergency stop device, the emergency stop dress
Install in the side of descaling bath, including acid tube, deposit sour pond and acid inlet tube, the both ends of acid tube and acid inlet tube respectively with pickling
Pond 501 is connected with sour pond is deposited, and kinetic pump is provided on acid inlet tube, and specific processing step is as follows:
Step 1: the pickling solution in descaling bath is discharged to and is deposited in sour pond；
When hang-up occurs in descaling bath, acid tube is opened, the pickling solution in pickling tube 501 is discharged into and is deposited in sour pond
It is kept in；
Step 2: repairing adjustment to descaling bath, is allowed to restore normal；
After step 1, on-call maintenance is carried out to descaling bath, is allowed to restore normal operating conditions；
Step 3: the pickling solution deposited in sour pond is flowed back into descaling bath；
After step 2, acid inlet tube is driven by kinetic pump and the pickling solution deposited in sour pond is withdrawn into pickling tube 501,
Steel band in descaling bath continues normal acid cleaning process, which can avoid the occurrence of steel band due in pickling section
Residence time is too long, in steel strip surface depositing contaminants, following process cause steel band show nigrescence or jaundice the phenomenon that, be conducive to
The surface quality of steel band is improved, and emergency stop device setting is simple, it is easily operated, it is low in cost.
Embodiment 2
With embodiment 1, except that α size is 20 ° in the present embodiment.
Embodiment 3
With embodiment 1, except that α size is 30 ° in the present embodiment.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (3)
1. a kind of emergency stop processing method of steel band descaling bath, which comprises the following steps:
Step 1: the pickling solution in descaling bath is discharged to and is deposited in sour pond；
When there is hang-up, acid tube is opened, the pickling solution in descaling bath is discharged into deposit in sour pond and is kept in；
Wherein the descaling bath includes pressure roller I (3), pressure roller II (6), pickling tube (501), acid tank cover (4), squeeze roller (8), drying
Air knife (9) and emergency stop device, the pressure roller I (3) and pressure roller II (6) are separately positioned on the entrance and exit position of descaling bath, pressure
Steel band is pressed into the pickling solution in pickling tube (501) by roller I (3) and pressure roller II (6), and wherein the outlet port of descaling bath is also successively
It is provided with squeeze roller (8) and drying air knife (9)；
It is provided in descaling bath more than two pickling tubes (501), the lower part of adjacent pickling tube (501) is connected, in pickling
It is provided with sealing structure on the outside of pond side wall (503), it is described including the sealing side wall (504) being fixedly connected with pickling tube side wall (503)
The groove formed between sealing side wall (504) and pickling tube side wall (503) is water sealed tank (502)；Above each pickling tube (501)
It is stamped acid tank cover (4)；
The emergency stop device is arranged in the side of descaling bath, including acid tube, deposits sour pond and acid inlet tube, acid tube and acid inlet tube
Both ends respectively with pickling tube (501) and deposit sour pond and be connected, kinetic pump is provided on acid inlet tube；
Step 2: repairing adjustment to descaling bath, is allowed to restore normal；
After step 1, on-call maintenance is carried out to descaling bath, is allowed to restore normal operating conditions；
Step 3: the pickling solution deposited in sour pond is flowed back into descaling bath；
After step 2, the pickling solution deposited in sour pond is flowed back into descaling bath through acid inlet tube by kinetic pump, to descaling bath
Interior steel band continues normal acid cleaning process；
The acid tank cover (4) includes inner wall (401), outer wall (402), upper cover (403) and deflector (404), and inner wall (401) is located at
Below upper cover (403), and it is connected in the surrounding position of upper cover (403), inner wall (401) and upper cover (403) composition one are hollow
Cavity, inner wall (401) are placed in above-mentioned water sealed tank (502)；Outer wall (402) is arranged in the outside of inner wall (401), and with
The upper surface of sealing side wall (504) is in contact；The medial surface of upper cover (403) is also fixed with deflector (404) along surrounding, described to lead
Flowing plate (404) is located at the inside of inner wall (401), and deflector (404) is tilted to upper cover (403) centre, so that deflector
(404) it is in contact on the inside of pickling tube side wall (503), and the angle between deflector (404) and pickling tube side wall (503) is
α, α are acute angle；The size of the angle α is 15~30 °；The explosionproof hole through its thickness is offered on the upper cover (403).
2. a kind of emergency stop processing method of steel band descaling bath according to claim 1, it is characterised in that: the acid tank cover
It (4) further include stiffening plate (405), wherein upper cover (403) is arcuate structure, and stiffening plate (405) setting is in upper cover (403)
The center of side, and the both ends of stiffening plate (405) are fixedly connected with deflector (404) respectively.
3. a kind of emergency stop processing method of steel band descaling bath according to claim 1 or 2, it is characterised in that: the pickling
It is additionally provided with acid mist purifying device (2) above slot, is disposed with cooling zone, neutral zone, two in the acid mist purifying device (2)
Secondary neutral zone and demister device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510928609.XA CN105506661B (en) | 2015-12-15 | 2015-12-15 | A kind of emergency stop processing method of steel band descaling bath |
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| CN201510928609.XA CN105506661B (en) | 2015-12-15 | 2015-12-15 | A kind of emergency stop processing method of steel band descaling bath |
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| CN105506661B true CN105506661B (en) | 2018-12-04 |
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| CN107502913A (en) * | 2017-09-22 | 2017-12-22 | 浙江金康铜业有限公司 | Steel band pickling system |
| CN110387552B (en) * | 2019-08-27 | 2024-04-30 | 中冶南方工程技术有限公司 | Energy-saving environment-friendly pickling device and strip treatment system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5982110A (en) * | 1982-11-02 | 1984-05-12 | Kawasaki Steel Corp | Descaling method of hot rolled steel sheet |
| CN201538542U (en) * | 2009-10-14 | 2010-08-04 | 北京京杰锐思技术开发有限公司 | Sealing cover structure |
| CN102995040A (en) * | 2012-10-15 | 2013-03-27 | 天津市亿博制钢有限公司 | Method for heating acid washing solution |
| CN204237870U (en) * | 2014-11-10 | 2015-04-01 | 芜湖双源管业有限公司 | A kind of pickling tank with built-in air knife |
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