CN107190267A - A kind of manufacturing process of pickling coil of strip - Google Patents
A kind of manufacturing process of pickling coil of strip Download PDFInfo
- Publication number
- CN107190267A CN107190267A CN201710444932.9A CN201710444932A CN107190267A CN 107190267 A CN107190267 A CN 107190267A CN 201710444932 A CN201710444932 A CN 201710444932A CN 107190267 A CN107190267 A CN 107190267A
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- China
- Prior art keywords
- pickling
- strip
- acid solution
- section
- descaling bath
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- 238000005554 pickling Methods 0.000 title claims abstract description 132
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 238000005406 washing Methods 0.000 claims abstract description 24
- 239000011324 bead Substances 0.000 claims abstract description 5
- 238000007602 hot air drying Methods 0.000 claims abstract description 5
- 238000003032 molecular docking Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 132
- 239000002253 acid Substances 0.000 claims description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 4
- 229910017435 S2 In Inorganic materials 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 238000005098 hot rolling Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 20
- 229910052742 iron Inorganic materials 0.000 abstract description 10
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 8
- 230000000052 comparative effect Effects 0.000 description 18
- 239000000523 sample Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 239000013068 control sample Substances 0.000 description 11
- 150000003839 salts Chemical class 0.000 description 11
- 239000000203 mixture Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010023126 Jaundice Diseases 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008121 plant development Effects 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- 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, comprise the following steps：S1, by coils of hot-rolled steel by uncoiling, compacting, aligning, obtains aligning strip；S2, passes sequentially through four sections of descaling baths by aligning coil of strip and carries out pickling processes, obtain pickling processes strip；S3, passes sequentially through four sections of rinsing bowls by pickling processes strip and carries out washing process, obtain washing process strip；S4, by washing process strip through hot-air drying unit drying process, passes sequentially through looping pit, bead cutter, three roller tensioners, docking shears, electrostatic oiler, the second side and leads device, turning, clamping and conveying roller, batch, unload volume, bundling is made；The present invention have the advantages that can by the thorough pickling of the oxide layer of belt steel surface totally and belt steel surface is not remained iron rust；The mechanical performance of strip can also be made（Such as elongation percentage, yield strength）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 technology
Pickling is very important process in process for producing cold rolled strip steel, the purpose is to remove belt steel surface iron oxide,
Adjusting weight of coil, raw edges is cut off, qualified blank is provided for milling train, produced with ensureing 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, with throwing
Money less, unit equipment simple, the strong adaptability to strip variety variations, simple to operate, easy care the advantages of, be adapted to medium and small shaped steel
Iron treatment plant uses.
However, prior art is in acid cleaning process, for the bad assurance of removal degree of the oxide layer of belt steel surface, it is easier to
There are the phenomenon for owing pickling or overpickling, and above-mentioned two situations, the mechanical strength for easily causing strip is a greater impact.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of manufacturing process of pickling coil of strip, tool
Have the advantages that be clean by the thorough pickling of the oxide layer of belt steel surface and to make belt steel surface 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 invention provides following technical scheme：
A kind of manufacturing process of pickling coil of strip, comprises the following steps：
S1, by coils of hot-rolled steel by uncoiler uncoiling, after pressure roller and recurvation roll pressing, is together made by uncoiler and slewing rollers
With, by the first side lead device be sent to nine roller pinch straighteners aligning, obtain aligning strip；
S2, first paragraph descaling bath, second segment descaling bath, the 3rd section of pickling are passed sequentially through by the aligning coil of strip obtained in step S1
Groove, the 4th section of descaling bath carry out pickling processes, and the concentration for the acid solution that the pickling processes are used is 4.5-21.0%, and described first
Section descaling bath, second segment descaling bath, the 3rd section of descaling bath, the concentration of acid solution in the 4th section of descaling bath are reduced successively, the acid
The temperature for washing acid solution in processing is 23-65 DEG C, and the total time of the pickling processes is 8-15min, obtains pickling processes strip；
S3, passes sequentially through four sections of rinsing bowls by the pickling processes strip obtained in step S2 and carries out washing process, wherein, first paragraph
Rinsing bowl, second segment rinsing bowl, the 3rd section of rinsing bowl use cold water wash, and the 4th section of rinsing bowl is cleaned using hot water, is obtained
Washing process strip；
S4, by the washing process strip obtained in step S3 through hot-air drying unit drying process, passes sequentially through the first pinch roll
Looping pit is sent to, handles and is transmitted through the second pinch roll by arc centralising device, then sequentially pass through bead cutter, three roller tension force
Device, docking shears, electrostatic oiler, the 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 0.030-0.040wt%
Carbon, 0.045-0.085wt% silicon, 0.20-0.29wt% manganese, 0.015-0.025wt% phosphorus, 0.010-
0.020wt% sulphur, 0.030-0.045wt% aluminium；
During pickling processes in the step S2, acid solution chooses hydrochloric acid solution；Pickling processes process in the step S2
In, the transfer rate of aligning strip is 80-120m/min.
By above-mentioned technical proposal, 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, is easy to later stage pickling to remove removing oxide layer.
Align strip transfer rate be 80-120m/min on the premise of, first paragraph descaling bath, second segment descaling bath, the
Three sections of descaling baths, the 4th section of descaling baths cooperate, and first paragraph descaling bath, second segment descaling bath, the 3rd section of descaling bath, the 4th
The concentration of hydrochloric acid solution in section descaling bath is reduced successively, is helped fully to remove the oxide layer of belt steel surface, is made its surface not
Remain iron rust；
Strip is aligned after the pickling processes that four sections of descaling baths cooperate, three sections of cold water washes and one section of heat are directly passed sequentially through
Water is cleaned, and the acid solution of the aligning belt steel surface residual after pickling processes is fully removed, and reduces residual acid solution to strip
The influence of mechanical strength.And the strip made after pickling processes of the aligning belt steel surface after pickling processes made is in the wrong simultaneously
Taking the mechanical strengths such as intensity, tensile strength is improved.
More preferably：In four sections of descaling baths in the step S2,
In first paragraph 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 first acid
The pickling time of liquid 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, the second acid solution
Pickling time be 2-3.5min；
In 3rd section of descaling bath, the concentration of the 3rd acid solution is 8.6-11.9%, and the temperature of the 3rd acid solution is 50-57 DEG C, the 3rd acid
The pickling time of liquid 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 acid solution
Pickling time be 3-5min.
By above-mentioned technical proposal, aligning strip is initially entered into first paragraph descaling bath, and the concentration of the first acid solution is higher, but
Its temperature is relatively low, and pickling time is more of short duration, is easier to significantly remove the iron rust composition of belt steel surface；Second segment descaling bath and
Hydrochloric acid solution (the in the concentration ratio first paragraph descaling bath of hydrochloric acid solution (the second acid solution with the 3rd acid solution) in three sections of descaling baths
One acid solution) concentration reduce successively, and the temperature of hydrochloric acid solution gradually rises, and processing time gradually increases, to belt steel surface
The removal dynamics of iron rust is reducing, and is difficult to cause unrusted strip damage.Hydrochloric acid solution the (the 4th in 4th section of descaling bath
Acid solution) concentration it is minimum, the less iron rust part that belt steel surface is remained is removed, and reaches the oxidation for fully removing belt steel surface
The effect of layer, not in remained on surface iron rust.
More preferably：Prewash tank is additionally provided with the step S2 and carries 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%.
By above-mentioned technical proposal, pre- pickling processes use the hydrochloric acid solution (the 5th acid solution) of higher concentration, and pre- pickling
Processing time is more of short duration, the aligning strip facilitated access for after uncoiler, slewing rollers, nine roller pinch straightener collective effects
Surface be broken after oxide layer in, be acid hydrolysis oxide layer and coming off for larger area occur, reduce below first paragraph acid
The difficulty of the acidolysis processing of hydrochloric acid solution of the washing trough into the 4th section of descaling bath.
More preferably：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
℃。
By above-mentioned technical proposal, hot water is conducive to abundant band to fall the acid solution of belt steel surface residual, and also easily makes 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.
More preferably：In the step S3, the hot water of the 4th section of rinsing bowl is heated by graphite heater.
Pass through above-mentioned technical proposal so that the first acid solution homogeneous heating of various concentrations, and graphite heater is not easily susceptible to
The corrosion of hydrochloric acid solution.
More preferably：The temperature of cold water is in the first paragraph rinsing bowl, second segment rinsing bowl, the 3rd section of rinsing bowl
20-25℃。
By above-mentioned technical proposal, sequentially pass through first paragraph rinsing bowl, second segment rinsing bowl, the 3rd section of rinsing bowl it is cold
After water cleaning, help constantly to reduce the concentration of the hydrochloric acid solution of belt steel surface, reduce the hydrochloric acid solution of residual to through pickling
The damage of aligning strip after processing.In addition, first paragraph rinsing bowl, second segment rinsing bowl, the 3rd section of rinsing bowl use cold water
Cleaning, can reach saving energy consumption, reduce the effect of production cost.
More preferably：In the step S1, hot-strip tiltedly cuts place after uncoiler uncoiling by entrance shearing machine
Reason.
By above-mentioned technical proposal, the hot-strip after tiltedly cutting processing through entrance shearing machine has preferable planarization, helped
In transmission efficiency of the raising hot-strip in transmit process.
In summary, the invention has the advantages that：
1. by the mutual cooperation of prewash tank, four sections of descaling baths and four sections of rinsing bowls, contribute to that the oxide layer of belt steel surface is thorough
Bottom pickling is removed and cleaned by current, is difficult to make belt steel surface remain iron rust, can also be made the machines such as elongation percentage, the yield strength of strip
Tool performance is improved；
2. rationally using pickling processes and the condition of water cleaning treatment, saving energy consumption, processing cost is reduced, contributes to medium and small shaped steel
The use of iron treatment plant.
Brief description of the drawings
Fig. 1 is the schematic flow sheet in embodiment 1.
In figure, 1, uncoiler；2nd, pressure roller；3rd, recurvation roller；5th, slewing rollers；6th, nine roller pinch straightener；71st, first paragraph pickling
Groove；72nd, second segment descaling bath；73rd, the 3rd section of descaling bath；74th, the 4th section of descaling bath；8th, rinsing bowl；9th, hot-air drying unit；
10th, looping pit；11st, bead cutter；12nd, three roller tensioner；13rd, docking shears；14th, electrostatic oiler；15th, entrance shearing machine.
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, with reference to Fig. 1, comprises the following steps：
S1, uncoiling is passed through by wide cut for 1000-1300mm coils of hot-rolled steel (composition and its corresponding parts by weight are as shown in table 1)
The uncoiling of machine 1, tiltedly cuts processing, then after pressure roller 2 and the compacting of recurvation roller 3, pass through uncoiler and slewing rollers 5 one by entrance shearing machine 15
Same-action, leads device by the first side and is sent to nine roller pinch straighteners 6 and align, and obtains aligning strip, and aligning strip is with 80-
120m/min transfer rate is transmitted；
S2, first paragraph descaling bath 71, second segment descaling bath 72, the 3rd section of acid are passed sequentially through by the aligning coil of strip obtained in step S1
Washing trough 73, the 4th section of descaling bath 74 are carried out in pickling processes, first paragraph descaling bath 71, and the concentration of hydrochloric acid solution is 17.5%, salt
The temperature of acid solution is 28 DEG C, and the pickling time of hydrochloric acid solution is 1.5min；In second segment descaling bath 72, the concentration of hydrochloric acid solution
For 12%, the temperature of hydrochloric acid solution is 45 DEG C, and the pickling time of hydrochloric acid solution is 2.8min；
In 3rd section of descaling bath 73, the concentration of hydrochloric acid solution is 8.6%, and the temperature of hydrochloric acid solution is 57 DEG C, the acid of hydrochloric acid solution
The time is washed for 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, the acid of hydrochloric acid solution
The time is washed for 5min；
S3, passes sequentially through four sections of rinsing bowls 8 by the pickling processes strip obtained in step S2 and carries out washing process, wherein, first
Section rinsing bowl 8, second segment rinsing bowl 8, the 3rd section of rinsing bowl 8 use temperature for 20 DEG C of cold water washes, and the 4th section of rinsing bowl 8 is adopted
Cleaned with the hot water that temperature is 60 DEG C is heated to by graphite heater, obtain washing process strip；
S4, by the washing process strip obtained in step S3 through the drying process of hot-air drying unit 9, passes sequentially through the first pinch roll
Looping pit 10 is sent to, handles and is transmitted through the second pinch roll by arc centralising device, then sequentially pass through bead cutter 11, three rollers
Tensioner 12, docking shears 13, electrostatic oiler 14, the second side lead device, turning, clamping and conveying roller, batch, unload volume, and bundling is made.
Embodiment 2-4：A kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, used coils of hot-rolled steel
Composition and its corresponding parts by weight it is different, the composition of specific coils of hot-rolled steel and its corresponding parts by weight are as shown in table 1.
The composition and its corresponding parts by weight of coils of hot-rolled steel in the embodiment 1-4 of table 1
Embodiment 5：A kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in first paragraph 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 paragraph 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 is, in the 3rd section of 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 is, in the 3rd section of 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 is, 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 is, 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 is, first paragraph rinsing bowl 8,
In two sections of rinsing bowls 8, the 3rd section of rinsing bowls 8, the temperature for the cold water of cold water wash is 23 DEG C.
Embodiment 14：A kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, first paragraph rinsing bowl 8,
In two sections of rinsing bowls 8, the 3rd section of rinsing bowls 8, the temperature for the cold water of cold water wash is 25 DEG C.
Embodiment 15：A kind of manufacturing process of pickling coil of strip, the difference with embodiment 13 is that the 4th section of rinsing bowl 8 is adopted
Cleaned with the hot water that temperature is 68 DEG C is heated to by graphite heater, obtain washing process strip.
Embodiment 16：A kind of manufacturing process of pickling coil of strip, the difference with embodiment 13 is that the 4th section of rinsing bowl 8 is adopted
Cleaned with the hot water that temperature is 75 DEG C is heated to by graphite heater, obtain 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 paragraph
The 5th acid solution being additionally provided with before descaling bath 71 in the pre- pickling processes of prewash tank progress, 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：In the application, as non-specifically is emphasized, concentration is mass percent concentration.
Comparative example 1：A kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, the composition of coils of hot-rolled steel and its
Corresponding parts by weight are as shown in table 2.
The composition and its corresponding parts by weight of coils of hot-rolled steel in the comparative example 1 of table 2
| Composition | 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 paragraph 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 paragraph 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 is, in the 3rd section of 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 is, in the 3rd section of 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 is, 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 is, 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 is, first paragraph rinsing bowl, second
In section rinsing bowl, the 3rd section of rinsing bowl, the temperature for the cold water of 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 is, first paragraph rinsing bowl, second
In section rinsing bowl, the 3rd section of rinsing bowl, the temperature for the cold water of 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 is, first paragraph rinsing bowl, second
In section rinsing bowl, the 3rd section of rinsing bowl, the temperature for the cold water of 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 is that the 4th section of rinsing bowl is used
The hot water that temperature is 50 DEG C is heated to by graphite heater to be cleaned, and obtains washing process strip.
Comparative example 14：A kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is that the 4th section of rinsing bowl is used
The hot water that temperature is 80 DEG C is heated to by graphite heater to be cleaned, and obtains washing process strip.
Comparative example 15：A kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, is entered using three sections of rinsing bowls
Row washing process, wherein, it is the cold water that temperature is 15 DEG C in first paragraph rinsing bowl, second segment rinsing bowl, the 3rd section of rinsing bowl.
Comparative example 16：A kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, is entered using four sections of rinsing bowls
Row washing process, wherein, it is temperature in first paragraph rinsing bowl, second segment rinsing bowl, the 3rd section of rinsing bowl, the 4th section of rinsing bowl
For 25 DEG C of cold water.
Experiment：Mechanical robustness testing
Subjects：The pickling coil of strip prepared using embodiment 1-19 is as test sample 1-19, using comparative example 1-16 systems
The standby pickling coil of strip obtained is used as control sample 1-16.
Test method：1st, each 10 groups of test sample 1-19 is chosen, each 10 groups of control sample 1-16 is chosen, observes and record 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 positioned over wet
Degree is 85%RH, lower 30 days of isoperibol that temperature is (25 ± 2) DEG C, observes the situation of getting rusty of each sample.
2nd, each 10 groups of test sample 1-19 is chosen, each 10 groups of control sample 1-16 is chosen, according to GB/T228.1-2010, to experiment
Sample 1-19, control sample 1-16 carry out elongation percentage, the test of yield strength respectively, record corresponding elongation percentage, yield strength, and make
Average treatment；
Result of the test：Surface color, surface smooth degree, situation of getting rusty, elongation percentage, yield strength such as table 3 in test sample 1-19
It is shown；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 the test sample 1-19 of table 3
Surface color, surface smooth degree, situation of getting rusty, elongation percentage, yield strength in the control sample 1-16 of table 4
From table 3 and table 4, test sample 1-19 surface color is white bright and smooth, illustrates four sections of pickling processes
The oxide layer of belt steel surface is fully removed with four sections of washing process, after oiling operation, the phenomenon got rusty is less prone to, and together
When with good elongation percentage and yield strength, making the mechanical performance of each test sample is improved.And in control sample 1-16, due to
The cooperation of pickling processes and washing process is not good enough, causes not sufficient enough the phenomenon of pickling occur, ultimately results in through pickling processes
There are the phenomenons such as jaundice, nigrescence 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,
But it is in the fabrication process, the lower temperature of cold water during holding cold water wash, or hot water is kept when hot water is cleaned
Higher temperature, can roll up power consumption, so as to add manufacturing cost, be unfavorable for middle-size and small-size steel treatment plant growth and
Development.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some 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 (7)
1. a kind of manufacturing process of pickling coil of strip, it is characterised in that comprise the following steps：
S1, uncoiler is passed through by coils of hot-rolled steel（1）Uncoiling, through pressure roller（2）And recurvation roller（3）After compacting, by uncoiler and turn
To roller（5）One same-action, leads device by the first side and is sent to nine roller pinch straighteners（6）Aligning, obtains aligning strip；
S2, first paragraph descaling bath is passed sequentially through by the aligning coil of strip obtained in step S1（71）, second segment descaling bath（72）, the 3rd
Section descaling bath（73）, the 4th section of descaling bath（74）Pickling processes are carried out, the concentration for the acid solution that the pickling processes are used is 4.5-
21.0%, the first paragraph descaling bath（71）, second segment descaling bath（72）, the 3rd section of descaling bath（73）, the 4th section of descaling bath（74）
In the concentration of acid solution reduce successively, the temperature of acid solution is 23-65 DEG C, the total time of the pickling processes in the pickling processes
For 8-15min, pickling processes strip is obtained；
S3, four sections of rinsing bowls are passed sequentially through by the pickling processes strip obtained in step S2（8）Washing process is carried out, wherein, the
One section of rinsing bowl（8）, second segment rinsing bowl（8）, the 3rd section of rinsing bowl（8）Use cold water wash, the 4th section of rinsing bowl（8）Adopt
Cleaned with hot water, obtain washing process strip；
S4, by the washing process strip obtained in step S3 through hot-air drying unit（9）Drying process, passes sequentially through the first pinch
Roller is sent to looping pit（10）, handle and transmitted through the second pinch roll by arc centralising device, then sequentially pass through bead cutter
（11）, three roller tensioners（12）, docking shears（13）, electrostatic oiler（14）, the 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, 0.045-0.085wt% silicon, 0.20-0.29wt% manganese, 0.015-0.025wt% phosphorus, 0.010-0.020wt%'s
Sulphur, 0.030-0.045wt% aluminium；
During pickling processes in the step S2, acid solution chooses hydrochloric acid solution；Pickling processes process in the step S2
In, the transfer rate of aligning strip is 80-120m/min.
2. the manufacturing process of a kind of pickling coil of strip according to claim 1, it is characterised in that four sections in the step S2
In descaling bath,
First paragraph descaling bath（71）In, 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；
Second segment descaling bath（72）In, 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；
3rd section of descaling bath（73）In, the concentration of the 3rd acid solution is 8.6-11.9%, and the temperature of the 3rd acid solution is 50-57 DEG C, the 3rd
The pickling time of acid solution is 2-5min；
4th section of descaling bath（74）In, 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.
3. the manufacturing process of a kind of pickling coil of strip according to claim 1, it is characterised in that also set up in the step S2
The temperature for having prewash tank to carry out the 5th acid solution in pre- pickling processes, 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%.
4. the manufacturing process of a kind of pickling coil of strip according to claim 1, it is characterised in that in the step S3, the 4th
Section rinsing bowl（8）Hot water cleaning in hot water temperature be 60-75 DEG C.
5. the manufacturing process of a kind of pickling coil of strip according to claim 4, it is characterised in that in the step S3, the 4th
Section rinsing bowl（8）Hot water heated by graphite heater.
6. a kind of manufacturing process of pickling coil of strip according to claim 1, it is characterised in that the first paragraph rinsing bowl
（8）, second segment rinsing bowl（8）, the 3rd section of rinsing bowl（8）The temperature of middle cold water is 20-25 DEG C.
7. the manufacturing process of a kind of pickling coil of strip according to claim 1, it is characterised in that in the step S1, hot rolling
Strip is through uncoiler（1）After uncoiling, pass through entrance shearing machine（15）Tiltedly cut processing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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