CN107190267B - A kind of manufacturing process of pickling coil of strip - Google Patents
A kind of manufacturing process of pickling coil of strip Download PDFInfo
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- CN107190267B CN107190267B CN201710444932.9A CN201710444932A CN107190267B CN 107190267 B CN107190267 B CN 107190267B CN 201710444932 A CN201710444932 A CN 201710444932A CN 107190267 B CN107190267 B CN 107190267B
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- pickling
- acid solution
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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
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
- C23G3/028—Associated apparatus, e.g. for pretreating or after-treating for thermal or mechanical pretreatment
-
- 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
- C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
- C23G3/029—Associated apparatus, e.g. for pretreating or after-treating for removing the pickling fluid from the objects
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of manufacturing process of pickling coil of strip, include the following steps: S1, by coils of hot-rolled steel by uncoiling, compacting, aligning, obtain aligning strip；Aligning coil of strip is passed sequentially through four sections of descaling baths and carries out pickling processes, obtains pickling processes strip by S2；Pickling processes strip is passed sequentially through four sections of rinsing bowls and carries out washing process, obtains washing process strip by S3；Washing process strip is dried by S4 through hot-air drying unit, is passed sequentially through looping pit, bead cutter, three roller tensioners, docking shears, electrostatic oiler, second side and is led device, turning, clamping and conveying roller, batch, unload volume, bundling is made；The present invention has the advantages that be clean by the thorough pickling of the oxide layer of belt steel surface and belt steel surface to be made not remain iron rust；The mechanical performance (such as elongation percentage, yield strength) of strip, which can also be made, to be improved.
Description
Technical field
The present invention relates to acid-washed metal field of material technology, more specifically, it relates to a kind of manufacture work of pickling coil of strip
Skill.
Background technique
Pickling is very important process in process for producing cold rolled strip steel, the purpose is to remove the iron oxide of belt steel surface,
Adjusting weight of coil cuts off raw edges, and qualified blank is provided for milling train, is produced with guaranteeing that cold rolling function successfully produces qualified strip
Product.Wherein, plug-type pickling lines are a kind of pickling units of noncontinuity, relative to continuous acid-washing production line, have and throw
Money less, unit equipment it is simple, to strip variety variations it is adaptable, easy to operate, easy to maintain the advantages that, be suitble to medium and small fashioned iron
Iron treatment plant uses.
However, the prior art is in acid cleaning process, the bad assurance of removal degree for the oxide layer of belt steel surface is easier to
There are the phenomenon that owing pickling or overpickling, and above-mentioned two situations, the mechanical strength of strip is easily caused to be a greater impact.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of manufacturing process of pickling coil of strip, tool
There is the advantages of can be clean by the thorough pickling of the oxide layer of belt steel surface and belt steel surface is made not remain iron rust；The machine of strip can also be made
Tool performance (such as elongation percentage, yield strength) is improved.
To achieve the above object, the present invention provides the following technical scheme that
A kind of manufacturing process of pickling coil of strip, includes the following steps:
Coils of hot-rolled steel is passed through uncoiler and slewing rollers one after pressure roller and recurvation roll pressing by uncoiler uncoiling by S1
Same-action leads device by the first side and is sent to nine roller pinch straighteners aligning, obtains aligning strip；
The aligning coil of strip obtained in step S1 is passed sequentially through first segment descaling bath, second segment descaling bath, third section acid by S2
Washing trough, the 4th section of descaling bath carry out pickling processes, and the concentration for the acid solution that the pickling processes use is 4.5-21.0%, and described the
One section of descaling bath, second segment descaling bath, third section descaling bath, acid solution in the 4th section of descaling bath concentration successively reduce, it is described
The temperature of acid solution is 23-65 DEG C in pickling processes, and the total time of the pickling processes is 8-15min, obtains pickling processes strip；
The pickling processes strip obtained in step S2 is passed sequentially through four sections of rinsing bowls and carries out washing process by S3, wherein the
One section of rinsing bowl, second segment rinsing bowl, third section rinsing bowl are all made of cold water wash, and the 4th section of rinsing bowl is cleaned using hot water,
Obtain washing process strip；
The washing process strip obtained in step S3 is dried through hot-air drying unit, passes sequentially through the first folder by S4
It send roller to be sent to looping pit, handled by arc centralising device and is transmitted through the second pinch roller, then successively pass through bead cutter, three rollers
Tensioner, docking shears, electrostatic oiler, second side lead device, turning, clamping and conveying roller, batch, unload volume, and bundling is made；
The wide cut of coils of hot-rolled steel in the step S1 is 1000-1300mm, and the coils of hot-rolled steel includes 0.030-
The carbon of 0.040wt%, the silicon of 0.045-0.085wt%, the manganese of 0.20-0.29wt%, the phosphorus of 0.015-0.025wt%,
The sulphur of 0.010-0.020wt%, the aluminium of 0.030-0.045wt%；
During pickling processes in the step S2, acid solution chooses hydrochloric acid solution；Pickling processes in the step S2
In the process, the transmission speed for aligning strip is 80-120m/min.
Through the above technical solutions, by uncoiler, slewing rollers, nine roller pinch straightener collective effects, by coils of hot-rolled steel
It is sufficiently spread out, and by the oxide layer ruptures of the belt steel surface after expansion, removes removing oxide layer convenient for later period pickling.
Align strip transmission speed be 80-120m/min under the premise of, first segment descaling bath, second segment descaling bath, the
Three sections of descaling baths, the 4th section of descaling bath cooperate, and first segment descaling bath, second segment descaling bath, third section descaling bath, the 4th
The concentration of hydrochloric acid solution in section descaling bath successively reduces, and facilitates the oxide layer for sufficiently removing belt steel surface, makes its surface not
Remain iron rust；
Strip is aligned after four sections of mutually matched pickling processes of descaling bath, directly passes sequentially through three sections of cold water washes and one
Section hot water cleaning sufficiently removes the acid solution of the aligning belt steel surface residual after pickling processes, reduces residual acid solution to band
The influence of the mechanical strength of steel.And the strip of the aligning belt steel surface after pickling processes made simultaneously made after pickling processes
The mechanical strengths such as yield strength, tensile strength improved.
Further preferably are as follows: in four sections of descaling baths in the step S2,
In first segment descaling bath, the concentration of the first acid solution is 17.5-21.0%, and the temperature of the first acid solution is 23-28 DEG C, the
The pickling time of one acid solution is 1-1.5min；
In second segment descaling bath, the concentration of the second acid solution is 12-17.4%, and the temperature of the second acid solution is 35-45 DEG C, second
The pickling time of acid solution is 2-3.5min；
In third section descaling bath, the concentration of third acid solution is 8.6-11.9%, and the temperature of third acid solution is 50-57 DEG C, the
The pickling time of three acid solutions is 2-5min；
In 4th section of descaling bath, the concentration of the 4th acid solution is 4.5-8.5%, and the temperature of the 4th acid solution is 60-65 DEG C, the 4th
The pickling time of acid solution is 3-5min.
Through the above technical solutions, aligning strip is initially entered into first segment descaling bath, the concentration of the first acid solution is higher, but
Its temperature is lower, and pickling time is more of short duration, is easier to significantly remove the iron rust ingredient of belt steel surface；Second segment descaling bath and
The concentration of hydrochloric acid solution (the second acid solution and third acid solution) in three sections of descaling baths is than the hydrochloric acid solution (the in first segment descaling bath
One acid solution) concentration successively reduce, and the temperature of hydrochloric acid solution gradually rises, and the processing time gradually increases, to belt steel surface
The removal dynamics of iron rust is reducing, and is not easy to cause to damage to unrusted strip.Hydrochloric acid solution the (the 4th in 4th section of descaling bath
Acid solution) concentration it is minimum, the less iron rust part of belt steel surface residual is removed, the oxidation of sufficiently removal belt steel surface is reached
The effect of layer, not in remained on surface iron rust.
Further preferably are as follows: be additionally provided with prewash tank in the step S2 and carry out pre- pickling processes, the pre- pickling processes
In the temperature of the 5th acid solution be 23-28 DEG C, time of pre- pickling is 30-60s, and the concentration of pre- pickling is 21.5-22%.
Through the above technical solutions, pre- pickling processes use the hydrochloric acid solution (the 5th acid solution) of higher concentration, and pre- pickling
The processing time is more of short duration, facilitates access for the aligning strip after uncoiler, slewing rollers, nine roller pinch straightener collective effects
Surface be broken after oxide layer in, be acid hydrolysis oxide layer and falling off for larger area occur, reduce below first segment acid
The difficulty of the acidolysis processing of hydrochloric acid solution of the washing trough into the 4th section of descaling bath.
Further preferably are as follows: in the step S3, the temperature of the hot water in the hot water cleaning of the 4th section of rinsing bowl is 60-75
℃。
Through the above technical solutions, hot water, which is conducive to abundant band, falls the acid solution of belt steel surface residual, and also easily make hydrochloric acid molten
Part is volatilized after liquid is heated, reduces the possibility that hydrochloric acid solution is remained in acid treated belt steel surface.
Further preferably are as follows: in the step S3, the hot water of the 4th section of rinsing bowl is heated by graphite heater.
Through the above technical solutions, making the first acid solution homogeneous heating of various concentration, and graphite heater is not easily susceptible to
The corrosion of hydrochloric acid solution.
Further preferably are as follows: the first segment rinsing bowl, second segment rinsing bowl, the temperature of cold water is in third section rinsing bowl
20-25℃。
Through the above technical solutions, successively pass through first segment rinsing bowl, second segment rinsing bowl, third section rinsing bowl it is cold
After water cleaning, helps constantly to reduce the concentration of the hydrochloric acid solution of belt steel surface, reduce remaining hydrochloric acid solution to through pickling
Treated aligning strip damage.In addition, first segment rinsing bowl, second segment rinsing bowl, third section rinsing bowl are all made of cold water
Cleaning, can reach energy saving, reduces the effect of production cost.
Further preferably are as follows: in the step S1, hot-strip tiltedly cuts place after uncoiler uncoiling, through entrance shearing machine
Reason.
Through the above technical solutions, tiltedly cutting that treated through entrance shearing machine, hot-strip has preferable planarization, helps
In transmission efficiency of the raising hot-strip in transmit process.
In conclusion the invention has the following advantages:
1. being facilitated by prewash tank, the mutual cooperation of four sections of descaling baths and four sections of rinsing bowls by the oxidation of belt steel surface
Thoroughly pickling is removed and is cleaned by water flow layer, is not easy that belt steel surface is made to remain iron rust, can also be made elongation percentage, the yield strength of strip
Etc. mechanical performances improved；
2. rationally utilizing the condition of pickling processes and water cleaning treatment, energy saving reduces processing cost, facilitates medium and small
The use of fashioned iron iron treatment plant.
Detailed description of the invention
Fig. 1 is the flow diagram in embodiment 1.
In figure, 1, uncoiler；2, pressure roller；3, anti-bending roll；5, slewing rollers；6, nine roller pinch straightener；71, first segment pickling
Slot；72, second segment descaling bath；73, third section descaling bath；74, the 4th section of descaling bath；8, rinsing bowl；9, hot-air drying unit；
10, looping pit；11, bead cutter；12, three roller tensioner；13, docking shears；14, electrostatic oiler；15, entrance shearing machine.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
Embodiment 1: a kind of manufacturing process of pickling coil of strip includes the following steps: with reference to Fig. 1
S1 passes through the coils of hot-rolled steel that wide cut is 1000-1300mm (ingredient and its corresponding parts by weight are as shown in table 1)
1 uncoiling of uncoiler tiltedly cuts processing by entrance shearing machine 15, then after pressure roller 2 and anti-bending roll 3 are suppressed, passes through uncoiler and steering
5 one same-action of roller leads device by the first side and is sent to nine roller pinch straighteners 6 and aligns, and obtains aligning strip, and align strip with
The transmission speed of 80-120m/min is transmitted；
The aligning coil of strip obtained in step S1 is passed sequentially through first segment descaling bath 71, second segment descaling bath 72, third by S2
Section descaling bath 73, the 4th section of descaling bath 74 carry out pickling processes, and in first segment descaling bath 71, the concentration of hydrochloric acid solution is
17.5%, the temperature of hydrochloric acid solution is 28 DEG C, and the pickling time of hydrochloric acid solution is 1.5min；In second segment descaling bath 72, hydrochloric acid
The concentration of solution is 12%, and the temperature of hydrochloric acid solution is 45 DEG C, and the pickling time of hydrochloric acid solution is 2.8min；
In third section descaling bath 73, the concentration of hydrochloric acid solution is 8.6%, and the temperature of hydrochloric acid solution is 57 DEG C, hydrochloric acid solution
Pickling time be 5min；
In 4th section of descaling bath 74, the concentration of hydrochloric acid solution is 4.5%, and the temperature of hydrochloric acid solution is 65 DEG C, hydrochloric acid solution
Pickling time be 5min；
The pickling processes strip obtained in step S2 is passed sequentially through four sections of rinsing bowls 8 and carries out washing process by S3, wherein
It is 20 DEG C of cold water washes, the 4th Duan Shuixi that first segment rinsing bowl 8, second segment rinsing bowl 8, third section rinsing bowl 8, which are all made of temperature,
Slot 8, which is used, to be heated to temperature by graphite heater and is cleaned for 60 DEG C of hot water, and washing process strip is obtained；
The washing process strip obtained in step S3 is dried through hot-air drying unit 9, passes sequentially through the first folder by S4
Send roller to be sent to looping pit 10, by arc centralising device handle and through the second pinch roller transmit, then successively by bead cutter 11,
Three roller tensioners 12, docking shears 13, electrostatic oiler 14, second side lead device, turning, clamping and conveying roller, batch, unload volume, bundling,
It is made.
Embodiment 2-4: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 be, used coils of hot-rolled steel
Ingredient and its corresponding parts by weight it is different, the ingredient of specific coils of hot-rolled steel and its corresponding parts by weight are as shown in table 1.
The ingredient of coils of hot-rolled steel and its corresponding parts by weight in 1 embodiment 1-4 of table
Embodiment 5: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in first segment descaling bath 71,
The concentration of hydrochloric acid solution is 19%, and the temperature of hydrochloric acid solution is 25 DEG C, and the pickling time of hydrochloric acid solution is 1.2min.
Embodiment 6: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in first segment descaling bath 71,
The concentration of hydrochloric acid solution is 21.0%, and the temperature of hydrochloric acid solution is 23 DEG C, and the pickling time of hydrochloric acid solution is 1min.
Embodiment 7: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in second segment descaling bath 72,
The concentration of hydrochloric acid solution is 15%, and the temperature of hydrochloric acid solution is 40 DEG C, and the pickling time of hydrochloric acid solution is 2min.
Embodiment 8: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in second segment descaling bath 72,
The concentration of hydrochloric acid solution is 17.4%, and the temperature of hydrochloric acid solution is 35 DEG C, and the pickling time of hydrochloric acid solution is 3.5min.
Embodiment 9: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in third section descaling bath 73,
The concentration of hydrochloric acid solution is 10.2%, and the temperature of hydrochloric acid solution is 53 DEG C, and the pickling time of hydrochloric acid solution is 2.5min.
Embodiment 10: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in third section descaling bath 73,
The concentration of hydrochloric acid solution is 11.9%, and the temperature of hydrochloric acid solution is 57 DEG C, and the pickling time of hydrochloric acid solution is 5min.
Embodiment 11: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in the 4th section of descaling bath 74,
The concentration of hydrochloric acid solution is 6.5%, and the temperature of hydrochloric acid solution is 63 DEG C, and the pickling time of hydrochloric acid solution is 4.5min.
Embodiment 12: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in the 4th section of descaling bath 74,
The concentration of hydrochloric acid solution is 8.5%, and the temperature of hydrochloric acid solution is 60 DEG C, and the pickling time of hydrochloric acid solution is 3min.
Embodiment 13: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 be, first segment rinsing bowl 8,
In two sections of rinsing bowls 8, third section rinsing bowl 8, the temperature of the cold water for cold water wash is 23 DEG C.
Embodiment 14: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 be, first segment rinsing bowl 8,
In two sections of rinsing bowls 8, third section rinsing bowl 8, the temperature of the cold water for cold water wash is 25 DEG C.
Embodiment 15: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 13 are that the 4th section of rinsing bowl 8 is adopted
It is cleaned with the hot water that temperature is 68 DEG C is heated to by graphite heater, obtains washing process strip.
Embodiment 16: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 13 are that the 4th section of rinsing bowl 8 is adopted
It is cleaned with the hot water that temperature is 75 DEG C is heated to by graphite heater, obtains washing process strip.
Embodiment 17: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in step S2, in first segment
It is additionally provided with prewash tank before descaling bath 71 and carries out pre- pickling processes, the 5th acid solution in pre- pickling processes is still hydrochloric acid solution,
Its concentration is 21.5%, and temperature is 23 DEG C, and the time of pre- pickling is 60s.
Embodiment 18: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 17 is, in pre- pickling processes, salt
The concentration of acid solution is 21.8%, and temperature is 25 DEG C, and the time of pre- pickling is 45s.
Embodiment 19: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 17 is, in pre- pickling processes, salt
The concentration of acid solution is 22%, and temperature is 28 DEG C, and the time of pre- pickling is 60s.
Note: it in the application, such as non-specifically emphasizes, concentration is mass percent concentration.
Comparative example 1: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 be, the ingredient of coils of hot-rolled steel and its
Corresponding parts by weight are as shown in table 2.
The ingredient of coils of hot-rolled steel and its corresponding parts by weight in 2 comparative example 1 of table
| Ingredient | C | Si | Mn | P | S | Al |
| Parts by weight (part) | 0.027 | 0.04 | 0.018 | 0.015 | 0.008 | 0.055 |
Comparative example 2: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in first segment descaling bath, salt
The concentration of acid solution is 15%, and the temperature of hydrochloric acid solution is 20 DEG C, and the pickling time of hydrochloric acid solution is 0.8min.
Comparative example 3: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in first segment descaling bath, salt
The concentration of acid solution is 25%, and the temperature of hydrochloric acid solution is 25 DEG C, and the pickling time of hydrochloric acid solution is 1.2min.
Comparative example 4: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in second segment descaling bath, salt
The concentration of acid solution is 11%, and the temperature of hydrochloric acid solution is 40 DEG C, and the pickling time of hydrochloric acid solution is 1.5min.
Comparative example 5: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in second segment descaling bath, salt
The concentration of acid solution is 19%, and the temperature of hydrochloric acid solution is 30 DEG C, and the pickling time of hydrochloric acid solution is 2min.
Comparative example 6: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in third section descaling bath, salt
The concentration of acid solution is 7.5%, and the temperature of hydrochloric acid solution is 45 DEG C, and the pickling time of hydrochloric acid solution is 1.5min.
Comparative example 7: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in third section descaling bath, salt
The concentration of acid solution is 12.5%, and the temperature of hydrochloric acid solution is 60 DEG C, and the pickling time of hydrochloric acid solution is 3min.
Comparative example 8: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in the 4th section of descaling bath, salt
The concentration of acid solution is 4%, and the temperature of hydrochloric acid solution is 68 DEG C, and the pickling time of hydrochloric acid solution is 2.8min.
Comparative example 9: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in the 4th section of descaling bath, salt
The concentration of acid solution is 9.5%, and the temperature of hydrochloric acid solution is 68 DEG C, and the pickling time of hydrochloric acid solution is 5.5min.
Comparative example 10: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 be, first segment rinsing bowl, second
In section rinsing bowl, third section rinsing bowl, the temperature of the cold water for cold water wash is 18 DEG C.
Comparative example 11: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 be, first segment rinsing bowl, second
In section rinsing bowl, third section rinsing bowl, the temperature of the cold water for cold water wash is 27 DEG C.
Comparative example 12: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 be, first segment rinsing bowl, second
In section rinsing bowl, third section rinsing bowl, the temperature of the cold water for cold water wash is 30 DEG C.
Comparative example 13: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are that the 4th section of rinsing bowl uses
The hot water that temperature is 50 DEG C is heated to by graphite heater to be cleaned, and washing process strip is obtained.
Comparative example 14: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are that the 4th section of rinsing bowl uses
The hot water that temperature is 80 DEG C is heated to by graphite heater to be cleaned, and washing process strip is obtained.
Comparative example 15: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 be, using three sections of rinsing bowls into
Row washing process, wherein first segment rinsing bowl, second segment rinsing bowl are the cold water that temperature is 15 DEG C in third section rinsing bowl.
Comparative example 16: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 be, using four sections of rinsing bowls into
Row washing process, wherein first segment rinsing bowl, third section rinsing bowl, in the 4th section of rinsing bowl is temperature at second segment rinsing bowl
For 25 DEG C of cold water.
Test: mechanical robustness testing
Subjects: the pickling coil of strip prepared using embodiment 1-19 is as test sample 1-19, using comparative example 1-
The 16 pickling coil of strips prepared are as control sample 1-16.
Test method: 1, choosing each 10 groups of test sample 1-19, chooses each 10 groups of control sample 1-16, observes and records test sample
The color and smooth degree on surface in 1-19, control sample 1-16, and record；Corresponding test sample and control sample are placed in wet
Degree be 85%RH, temperature is isoperibol lower 30 days of (25 ± 2) DEG C, observes the situation of getting rusty of each sample.
2, each 10 groups of test sample 1-19 are chosen, each 10 groups of control sample 1-16 are chosen, according to GB/T228.1-2010, to test
Sample 1-19, control sample 1-16 carry out the test of elongation percentage, yield strength respectively, record corresponding elongation percentage, yield strength, and make
Average treatment；
Test result: surface color, surface smooth degree, situation of getting rusty, elongation percentage, yield strength be such as in test sample 1-19
Shown in table 3；Surface color, surface smooth degree, situation of getting rusty, elongation percentage, yield strength are as shown in table 4 in control sample 1-16.
Surface color, surface smooth degree, situation of getting rusty, elongation percentage, yield strength in 3 test sample 1-19 of table
Surface color, surface smooth degree, situation of getting rusty, elongation percentage, yield strength in 4 control sample 1-16 of table
By table 3 and table 4 it is found that the surface color of test sample 1-19 is white bright and smooth, four sections of pickling processes are illustrated
The oxide layer of belt steel surface is sufficiently removed with four sections of washing process, after oiling operation, is less prone to the phenomenon that getting rusty, and same
When have good elongation percentage and yield strength, improve the mechanical performance of each test sample.And in control sample 1-16, due to
The cooperation of pickling processes and washing process is not good enough, leads to the phenomenon that pickling is not enough occur, eventually leads to through pickling processes
There is phenomena such as jaundice, black in belt steel surface afterwards, and also affects elongation percentage and yield strength, reduces the machine of respective sample
Tool intensity.Although control sample 10 and control sample 14 have preferable belt steel surface color and surface smooth degree, also do not get rusty,
It but in the fabrication process, is the lower temperature of cold water during keeping cold water wash, or when hot water is cleaned keeps hot water
Higher temperature can increase significantly energy consumption, to increase manufacturing cost, be unfavorable for middle-size and small-size steel treatment plant growth and
Development.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of manufacturing process of pickling coil of strip, which comprises the steps of:
S1 by uncoiler and turns coils of hot-rolled steel by uncoiler (1) uncoiling after pressure roller (2) and anti-bending roll (3) compacting
To (5) one same-action of roller, device is led by the first side and is sent to nine roller pinch straighteners (6) aligning, obtains aligning strip；
The aligning coil of strip obtained in step S1 is passed sequentially through first segment descaling bath (71), second segment descaling bath (72), third by S2
Section descaling bath (73), the 4th section of descaling bath (74) carry out pickling processes, and the concentration for the acid solution that the pickling processes use is 4.5-
21.0%, the first segment descaling bath (71), second segment descaling bath (72), third section descaling bath (73), the 4th section of descaling bath (74)
In the concentration of acid solution successively reduce, the temperature of acid solution is 23-65 DEG C in the pickling processes, the total time of the pickling processes
For 8-15min, pickling processes strip is obtained；
In four sections of descaling baths,
In first segment descaling bath (71), the concentration of the first acid solution is 17.5-21.0%, and the temperature of the first acid solution is 23-28 DEG C, the
The pickling time of one acid solution is 1-1.5min；
In second segment descaling bath (72), the concentration of the second acid solution is 12-17.4%, and the temperature of the second acid solution is 35-45 DEG C, second
The pickling time of acid solution is 2-3.5min；
In third section descaling bath (73), the concentration of third acid solution is 8.6-11.9%, and the temperature of third acid solution is 50-57 DEG C, third
The pickling time of acid solution is 2-5min；
In 4th section of descaling bath (74), the concentration of the 4th acid solution is 4.5-8.5%, and the temperature of the 4th acid solution is 60-65 DEG C, the 4th
The pickling time of acid solution is 3-5min；
The pickling processes strip obtained in step S2 is passed sequentially through four sections of rinsing bowls (8) and carries out washing process by S3, wherein the
One section of rinsing bowl (8), second segment rinsing bowl (8), third section rinsing bowl (8) are all made of cold water wash, and the 4th section of rinsing bowl (8) is adopted
It is cleaned with hot water, obtains washing process strip；
The washing process strip obtained in step S3 is dried through hot-air drying unit (9), passes sequentially through the first pinch by S4
Roller is sent to looping pit (10), handles by arc centralising device and transmits through the second pinch roller, then successively passes through bead cutter
(11), three roller tensioners (12), docking shears (13), electrostatic oiler (14), second side lead device, turning, clamping and conveying roller, batch,
Volume is unloaded, bundling is made；
The wide cut of coils of hot-rolled steel in the step S1 is 1000-1300mm, and the coils of hot-rolled steel includes 0.030-0.040wt%
Carbon, the silicon of 0.045-0.085wt%, the manganese of 0.20-0.29wt%, the phosphorus of 0.015-0.025wt%, 0.010-0.020wt%'s
Sulphur, the aluminium of 0.030-0.045wt%；
During pickling processes in the step S2, acid solution chooses hydrochloric acid solution；Pickling processes process in the step S2
In, the transmission speed for aligning strip is 80-120m/min.
2. a kind of manufacturing process of pickling coil of strip according to claim 1, which is characterized in that also set up in the step S2
There is prewash tank to carry out pre- pickling processes, the temperature of the 5th acid solution in the pre- pickling processes is 23-28 DEG C, the time of pre- pickling
For 30-60s, the concentration of pre- pickling is 21.5-22%.
3. a kind of manufacturing process of pickling coil of strip according to claim 1, which is characterized in that in the step S3, the 4th
The temperature of hot water in the hot water cleaning of section rinsing bowl (8) is 60-75 DEG C.
4. a kind of manufacturing process of pickling coil of strip according to claim 3, which is characterized in that in the step S3, the 4th
The hot water of section rinsing bowl (8) is heated by graphite heater.
5. a kind of manufacturing process of pickling coil of strip according to claim 1, which is characterized in that the first segment rinsing bowl
(8), second segment rinsing bowl (8), the temperature of cold water is 20-25 DEG C in third section rinsing bowl (8).
6. a kind of manufacturing process of pickling coil of strip according to claim 1, which is characterized in that in the step S1, hot rolling
Strip tiltedly cuts processing after uncoiler (1) uncoiling, through entrance shearing machine (15).
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| CN111850577A (en) * | 2020-06-03 | 2020-10-30 | 云南钛业股份有限公司 | Acid pickling method for zirconium coil |
| CN112355050A (en) * | 2020-10-14 | 2021-02-12 | 浙江屹立金属材料有限公司 | Production process of steel coil |
| CN118422215A (en) * | 2024-05-08 | 2024-08-02 | 浙江众凌科技有限公司 | Novel Invar raw material cleaning line body and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205350A (en) * | 2011-01-22 | 2011-10-05 | 马鞍山钢铁股份有限公司 | Device and method for removing scale skin of hot rolled steel plate for cold rolling |
| CN103255429A (en) * | 2013-04-06 | 2013-08-21 | 莱芜市泰山冷轧板有限公司 | Pickling method of hot rolled steel strip |
| CN104694942A (en) * | 2015-03-31 | 2015-06-10 | 北京首钢股份有限公司 | Hot-rolled pickled plate producing method and hot-rolled pickled plate pickling system |
| CN106232847A (en) * | 2014-04-18 | 2016-12-14 | 株式会社神户制钢所 | The hot rolled steel plate of the hardness excellence after deep-cold processing and processing |
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2017
- 2017-06-13 CN CN201710444932.9A patent/CN107190267B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205350A (en) * | 2011-01-22 | 2011-10-05 | 马鞍山钢铁股份有限公司 | Device and method for removing scale skin of hot rolled steel plate for cold rolling |
| CN103255429A (en) * | 2013-04-06 | 2013-08-21 | 莱芜市泰山冷轧板有限公司 | Pickling method of hot rolled steel strip |
| CN106232847A (en) * | 2014-04-18 | 2016-12-14 | 株式会社神户制钢所 | The hot rolled steel plate of the hardness excellence after deep-cold processing and processing |
| CN104694942A (en) * | 2015-03-31 | 2015-06-10 | 北京首钢股份有限公司 | Hot-rolled pickled plate producing method and hot-rolled pickled plate pickling system |
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