CN107268012A - Manufacturing process is rolled up in pickling - Google Patents
Manufacturing process is rolled up in pickling Download PDFInfo
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- CN107268012A CN107268012A CN201710446704.5A CN201710446704A CN107268012A CN 107268012 A CN107268012 A CN 107268012A CN 201710446704 A CN201710446704 A CN 201710446704A CN 107268012 A CN107268012 A CN 107268012A
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- pickling
- descaling bath
- section
- acid solution
- drying
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
-
- 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
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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
- C22C38/06—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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Manufacturing process is rolled up the invention discloses a kind of pickling, including：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；The acid gas of pickling processes is pumped down to absorption tower and carries out neutralisation treatment, and absorption tower includes tower body, is arranged at feed tube, drain pipe, escape pipe on tower body, is arranged at the agitating device of the inside of tower body, is arranged at tower body bottom and the liquid collecting portion with inner chamber；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 three sections of hot-air drying unit drying process, passes sequentially through looping pit, bead cutter, docking shears, electrostatic oiler, batches, unloads volume, bundling is made；The present invention, which has, to be made strip pickling fully and effectively handles acid gas, is difficult to make acid gas leak in operating environment the advantage for endangering operator's health.
Description
Technical field
The present invention relates to acid-washed metal field of material technology, more specifically, it relates to which manufacturing process is rolled up in a kind of pickling.
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 cold rolling
Factory uses.
In whole plug-type pickling group, pickling processes are more crucial., can shape after acid solution is heated in acid cleaning process
Into acid gas, easily it is attached to belt steel surface and oxide layer is handled.However, acid gas is continuously increased in descaling bath, easily cause
Pressure in descaling bath is excessive, so as to easily make acid gas from descaling bath side leakages, pollutes whole operation environment, and pollute operation
The health of human body of personnel；Meanwhile, acid gas can not discharge descaling bath in time, the pickling processes degree for easily causing belt steel surface it is excessive and
Cause the phenomenons such as overpickling.
The content of the invention
In view of the deficienciess of the prior art, manufacturing process is rolled up it is an object of the invention to provide a kind of pickling, with making
Strip pickling handles fully and effectively acid gas, is difficult to make acid gas to leak to and the excellent of operator's health is endangered in operating environment
Point.
To achieve the above object, the invention provides following technical scheme：
Manufacturing process is rolled up in a kind of pickling, is comprised 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 hydrochloric acid solution that the pickling processes are used is described for 4.5-21.0%
First paragraph 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, institute
The temperature for stating acid solution in pickling processes is 23-65 DEG C, the first paragraph descaling bath, second segment descaling bath, the 3rd section of descaling bath, the
The temperature of acid solution in four sections of descaling baths is improved successively；The total time of the pickling processes is 8-15min；
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 three sections of hot-air drying unit drying process, passes sequentially through the first folder
Send roller to be sent to looping pit, handle and transmitted through the second pinch roll by arc centralising device, then sequentially pass through bead cutter, three rollers
Tensioner, docking shears, electrostatic oiler, the second side lead device, turning, clamping and conveying roller, batch, unload volume, and bundling is made；
The acid gas of pickling processes is pumped down to absorption tower and carries out neutralisation treatment in the step S2, and the absorption tower includes tower body, if
Feed tube, drain pipe, the escape pipe being placed on tower body, are arranged at the agitating device of the inside of tower body, be arranged at tower body bottom and
Liquid collecting portion with inner chamber, the alkali liquor pipe connected with the inner chamber in liquid collecting portion；The outer wall in the liquid collecting portion and the inwall of tower body are close
Abut and the through hole connected with inner chamber is offered on the inwall in liquid collecting portion, the liquid collecting portion is polytetrafluoroethylene (PTFE) material；The tower
Body is internally provided with spray equipment；
Coils of hot-rolled steel in the step S1 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.
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.
In pickling processes, pass through first paragraph descaling bath, second segment descaling bath, the 3rd section of descaling bath, the 4th section of descaling bath
Cooperate, and first paragraph descaling bath, second segment descaling bath, the 3rd section of descaling bath, hydrochloric acid solution in the 4th section of descaling bath
Concentration is reduced successively, first paragraph descaling bath, second segment descaling bath, the 3rd section of descaling bath, the temperature of acid solution in the 4th section of descaling bath
Degree is improved successively, is helped fully to remove the oxide layer of belt steel surface, its surface is not remained iron rust；
Because in pickling processes, the temperature of hydrochloric acid solution is different, it may appear that different degrees of acid gas, by air pump periodically by acid
Gas is pumped into absorption tower.Alkali lye is transported into the cavity in liquid collecting portion by alkali liquor pipe, then by through hole from cavity to liquid collecting
Flowed in the groove that portion is formed.Water is sprayed out from spray equipment, is combined with entering the acid gas inside absorption tower, forms acid solution, stream
Into liquid collecting portion, in the presence of agitating device, with alkali lye occur neutralization reaction so that into the acid gas inside absorption tower by
To quick and good processing.And liquid collecting portion is made of polytetrafluoroethylmaterial material, acid and alkali-resistance, with longer useful life,
And corrosion of the acid solution of alkali lye and formation to tower body inwall is reduced, so as to be played a protective role to tower body inwall.
In addition, when liquid collecting portion is discharged with the effect for storing alkali lye, and alkali lye from through hole, it may appear that the phenomenon such as turbulent flow,
Help occur more sufficient neutralization reaction with acid solution.
After acid gas in tower forms acid solution and neutralized with alkali lye, the air pressure in tower declines, when first paragraph descaling bath, second segment
When descaling bath, the 3rd section of descaling bath, the acid gas content in the 4th section of descaling bath are larger, acid gas can be to spill-over inside absorption tower.Should
Scheme not only makes first paragraph descaling bath, second segment descaling bath, the 3rd section of descaling bath, the 4th section of descaling bath interior full of acid gas, to warp
The strip crossed forms sufficient pickling, and the iron rust of belt steel surface is fully removed, and is less prone to again because acid gas is excessive, descaling bath
Internal pressure is excessive and causes the phenomenon of leakage, good operating environment is helped to maintain, while also contributing to protect operator
The health of human body of work.After acid solution is neutralized with alkali lye, discharged by drain pipe.
Using three sections of hot-air drying unit drying process, it can not only reach and fully remove through pickling processes and washing process
The moisture of belt steel surface afterwards, makes its surface not remain water stain, and is easy to later stage progress electrostatic to scribble processing.
More preferably：It is provided with the liquid collecting portion on ridge, the inwall of the tower body and is provided with stopper slot, it is described
Ridge is inserted in stopper slot.
By above-mentioned technical proposal, the cooperation of ridge and stopper slot improves the stability in liquid collecting portion, helps to reduce collection
The skew in liquid portion.
More preferably：The spray equipment includes level spray part and vertical spray part, the vertical spray part with
Level spray part connection is set.
By above-mentioned technical proposal, level spray part cooperates with vertical spray part, increases the scope of spray, make into
The globule that entering the acid gas inside tower body can be gone out by spray is rapidly and sufficiently combined, and forms acid solution, and then rapidly reduce tower body
Internal pressure, contributes to the superfluous acid gas inside each section of descaling bath to enter by feed tube inside tower body, and then contribute to
Make the phenomenon for being but less prone to overpickling by abundant pickling by the belt steel surface of descaling bath.
More preferably：The level spray part includes the peaceful straight tube of swan-neck, inside of the swan-neck along tower body
Crooked radian set；The vertical spray part includes some VERTICAL TUBEs, the VERTICAL TUBE spaced set on swan-neck,
The swan-neck, straight pipe, it is provided with shower nozzle in VERTICAL TUBE.
By above-mentioned technical proposal, the scope of shower spray is further increased, so as to increase the water of shower ejection
Contact range between pearl and acid gas.
More preferably：The escape pipe is internally provided with adsorption section, and the adsorption section includes sleeve and is arranged at set
Adsorption piece inside cylinder, the adsorption piece includes the adsorption layer of multiple-layer stacked.
By above-mentioned technical proposal, it is the pressure of compensation tower inside and outside, is provided with escape pipe.Because part acid gas can pass through
Escape pipe is outwards discharged, and adsorption piece reduces what acid gas was discharged from escape pipe to carrying out adsorption treatment by the acid gas of escape pipe
May.The purpose for reducing tower body internal pressure is reached, and also contributes to the clean level of operating environment.
More preferably：The adsorption layer be active carbon layer, sodium carbonate layer, neatly rock layers, cao layers at least
Three kinds.
By above-mentioned technical proposal, activated carbon is combined with the acid gas containing moisture, plays a part of adsorbing acid gas；And carbonic acid
Sodium layer is combined with hydrochloric acid acid gas, is reacted, so as to form carbon dioxide；And neatly rock layers, cao layers etc. can play absorption
Hydrochloric acid acid gas, carbon dioxide etc. are acted on, and reduce further the pollution of air discharge.
More preferably：In the step S4, three sections of hot-air drying unit drying process include first paragraph drying, second
Section drying, the 3rd section of drying, the first paragraph drying, second segment drying, the drying temperature of the 3rd section of drying are followed successively by 70-90
℃、45-55℃、40-45℃；Dried by first paragraph, second segment is dried, the time of the 3rd section of drying is respectively 12-15s, 10-
18s、15-20s。
By above-mentioned technical proposal, found through research (experiment one), passing through said temperature and corresponding drying time
After first paragraph drying, second segment drying, the 3rd section of drying and processing, it is difficult to make the table of the strip after pickling processes and washing process
Face carries the acid solution and the globule of residual, and is favorably improved the bright and clean effect to belt steel surface.
More preferably：In four sections of descaling baths in the step S2,
In first paragraph descaling bath, the concentration of hydrochloric acid solution is 17.5-21.0%, and the temperature of hydrochloric acid solution is 23-28 DEG C, and hydrochloric acid is molten
The pickling time of liquid is 1-1.5min；
In second segment descaling bath, the concentration of hydrochloric acid solution is 12-17.4%, and the temperature of hydrochloric acid solution is 35-45 DEG C, hydrochloric acid solution
Pickling time be 2-3.5min；
In 3rd section of descaling bath, the concentration of hydrochloric acid solution is 8.6-11.9%, and the temperature of hydrochloric acid solution is 50-57 DEG C, and hydrochloric acid is molten
The pickling time of liquid is 2-5min；
In 4th section of descaling bath, the concentration of hydrochloric acid solution is 4.5-8.5%, and the temperature of hydrochloric acid solution is 60-65 DEG C, hydrochloric 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 hydrochloric 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
The concentration of hydrochloric acid solution in the concentration ratio first paragraph descaling bath of hydrochloric acid solution in three sections of descaling baths is reduced successively, and hydrochloric acid is molten
The temperature of liquid gradually rises, and processing time gradually increases, and the removal dynamics to the iron rust of belt steel surface is reducing, and is difficult to not giving birth to
The strip of rust causes damage.The concentration of hydrochloric acid solution in 4th section of descaling bath is minimum, the less iron that belt steel surface is remained
Rust part is removed, and the effect for the oxide layer for fully removing belt steel surface is reached, not in remained on surface iron rust.
More preferably：The wide cut of coils of hot-rolled steel in the step S1 is 1000-1300mm；In the step S2
During pickling processes, the transfer rate of aligning strip is 80-120m/min.
By above-mentioned technical proposal, wide cut is changed greatly, and is conducive to meeting demand of the client to the strip of different wide cuts, is carried
The high wide in range property of operation.The transfer rate scope is relatively stable, helps to make the strip held stationary of carry out pickling processes
Transport effect, it helps improve the significant degree of strip pickling processing, the phenomenon such as overpickling or deficient pickling occurs in reduction.
More preferably：The spray equipment is arranged at the top of inlet.
By above-mentioned technical proposal, acid gas is entered to inside tower body from inlet, and the water that spray equipment sprays is from the top down
Effect, helps fully to combine acid gas, so that acid gas and globule formation acid solution.Formed by acid solution be difficult from inlet overflow
Go out, so as to be difficult to make acid solution influence acid gas to enter inside tower body.
In summary, the invention has the advantages that：
1. acid gas is reclaimed and acid gas is quickly and efficiently handled, with making strip pickling fully but be difficult strip occurred
Pickling phenomenon；
2. it is difficult to leak to acid gas to endanger operator's health in operating environment；
3. extend the service life on absorption tower.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of embodiment 1；
Fig. 2 is the structural representation of embodiment 1, is mainly used in embodying tower body, feed tube, drain pipe, the structure of escape pipe；
Fig. 3 is the partial sectional view of tower body in embodiment 1, is mainly used in embodying liquid collecting portion, alkali liquor pipe, inner chamber, through hole, stopper slot
Structure；
Fig. 4 is the structural representation of embodiment 1, is mainly used in embodiment level spray part, swan-neck, straight pipe, VERTICAL TUBE, ridge
Structure；
Fig. 5 is the structural representation of embodiment 1, is mainly used in embodying adsorption section, sleeve, adsorption layer, fixture block, the structure of neck.
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；16th, tower
Body；17th, feed tube；18th, drain pipe；19th, escape pipe；20th, agitating device；21st, liquid collecting portion；22nd, alkali liquor pipe；23rd, inner chamber；24、
Through hole；25th, ridge；26th, stopper slot；271st, level spray part；2711st, swan-neck；2712nd, straight pipe；272nd, VERTICAL TUBE；28、
Adsorption section；281st, sleeve；282nd, adsorption layer；29th, fixture block；30th, neck.
Embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
Embodiment 1：Manufacturing process is rolled up in pickling, with reference to Fig. 1, is comprised 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 carry out pickling processes, and acid gas is pumped down to absorption tower and carries out neutralisation treatment；
Wherein, in first paragraph descaling bath 71, the concentration of hydrochloric acid solution is 17.5%, and the temperature of hydrochloric acid solution is 28 DEG C, and hydrochloric acid is molten
The pickling time of liquid is 1.5min；
In second segment descaling bath 72, the concentration of hydrochloric acid solution is 12%, and the temperature of hydrochloric acid solution is 45 DEG C, the pickling of hydrochloric acid solution
Time 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, wherein, first paragraph rinsing bowl 8, second segment rinsing bowl 8, the 3rd section of rinsing bowl 88 use temperature clear for 20 DEG C of cold water
Wash, the 4th section of rinsing bowl 8, which is used, to be heated to temperature by graphite heater and cleaned for 60 DEG C of hot water, obtains washing process
Strip；
S4, by the washing process strip obtained in step S3 through three sections of drying process of hot-air drying unit 9, wherein, first paragraph dries
Dry, second segment drying, the drying temperature of the 3rd section of drying are followed successively by 70 DEG C, 45 DEG C, 40 DEG C；Dried by first paragraph, second segment
Drying, the time of the 3rd section of drying are respectively 12s, 10s, 15s；Strip after drying passes sequentially through the first pinch roll and is sent to
Looping pit 10, handles by arc centralising device and is transmitted through the second pinch roll, then sequentially passes through bead cutter 11, three roller tension force dress
Put 12, docking shears 13, electrostatic oiler 14, the second side to lead device, turning, clamping and conveying roller, batch, unload volume, bundling is made；
Reference picture 2, absorption tower includes tower body 16, the feed tube 17 and escape pipe 19 connected with the inside of tower body 16.Reference picture 3,
Tower body 16 is internally provided with agitating device 20, and the bottom inside tower body 16, which is connected with one, to be had inner chamber 23 and use poly- four
The liquid collecting portion 21 that PVF is made, the shape in the liquid collecting portion 21 is identical with the shape of the bottom of tower body 16, its outer wall and tower body 16
Inwall is closely abutted, and the through hole 24 connected with inner chamber 23 is offered on its inwall.Through the lower section of tower body 16 be provided with two with
The alkali liquor pipe 22 that inner chamber 23 is connected；Spray equipment is provided with inside the tower body 16 in liquid collecting portion 21 and above inlet.In tower
The bottom of body 16 is provided with drain pipe 18, and the drain pipe 18 is set through liquid collecting portion 21.On feed tube 17, two alkali liquor pipes 22
Air pump is connected with, is respectively used to be pumped into acid gas when needing and sends into alkali lye.
It has been provided projectingly on a ridge 25, the inwall of the bottom of tower body 16 and has offered on reference picture 4, the outer wall in liquid collecting portion 21
Stopper slot 26, and ridge 25 is inserted in stopper slot 26 (reference picture 2).
Reference picture 4, spray equipment includes level spray part 271 and vertical spray part, and vertical spray part sprays part with level
271 connections are set.Level spray part 271 includes the swan-neck that two symmetrical and along the inside of tower body 16 crooked radians are set
2711 and the straight pipe 2712 that is arranged between two swan-necks 2711.Vertical spray part includes eight VERTICAL TUBEs 272, every
Equidistantly four VERTICAL TUBEs 272 are provided with and communicated with swan-neck 2711, and VERTICAL TUBE 272 is to tower body 16 (this figure is not shown) bottom
Portion extends.Straight pipe 2712, VERTICAL TUBE 272, it is provided with shower nozzle on swan-neck 2711.
Reference picture 5, is arranged with an adsorption section 28 inside escape pipe 19, and the adsorption section 28 includes sleeve 281 and card
Be located at the adsorption piece inside sleeve 281, the adsorption piece include along the active carbon layer that level is stacked successively from inside to outside of escape pipe 19,
Sodium carbonate layer, neatly rock layers.Fixture block 29 is provided with the outer wall of sleeve 281, and " L " shape is offered on the inwall of gas outlet
Neck 30.Active carbon layer, sodium carbonate layer, neatly rock layers are stacked successively and outer wall is closely abutted with the inwall of sleeve 281, then will
Fixture block 29 on sleeve 281 is horizontally rotated after being placed downwards along neck 30, realize the entirety of sleeve 281 and adsorption piece formation with
Fixation between gas outlet vertically.
Embodiment 2-4：Manufacturing process is rolled up in pickling, and 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 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：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, first paragraph drying, second segment drying, the
The drying temperature of three sections of drying is followed successively by 78 DEG C, 49 DEG C, 42 DEG C；Dried by first paragraph, second segment drying, the 3rd section drying
Time is respectively 13s, 15s, 18s.
Embodiment 14：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, first paragraph drying, second segment drying, the
The drying temperature of three sections of drying is followed successively by 82 DEG C, 52 DEG C, 43 DEG C；Dried by first paragraph, second segment drying, the 3rd section drying
Time is respectively 13s, 15s, 18s.
Embodiment 15：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, first paragraph drying, second segment drying, the
The drying temperatures of three sections of drying are followed successively by 85,47 DEG C, 44 DEG C；Dried by first paragraph, second segment drying, the 3rd section drying when
Between be respectively 11s, 13s, 12s.
Embodiment 16：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, first paragraph drying, second segment drying, the
The drying temperature of three sections of drying is followed successively by 90 DEG C, 55 DEG C, 45 DEG C；Dried by first paragraph, second segment drying, the 3rd section drying
Time is respectively 15s, 18s, 20s.
Embodiment 17：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece includes active carbon layer, sodium carbonate
Layer, cao layers.
Embodiment 18：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece includes active carbon layer, hydrotalcite
Layer, cao layers.
Embodiment 19：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece includes sodium carbonate layer, hydrotalcite
Layer, cao layers.
Embodiment 20：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece includes active carbon layer, sodium carbonate
Layer, neatly rock layers, cao layers.
Comparative example 1：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, is not provided with liquid collecting portion 21.
Comparative example 2：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, the liquid collecting portion 21 of setting is iron and steel material quality.
Comparative example 3：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, in spray equipment, only straight containing two
Pipe 2712.
Comparative example 4：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, in spray equipment, only containing two bendings
Pipe 2711.
Comparative example 5：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, in spray equipment, only vertical containing eight
Pipe 272.
Comparative example 6：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, using one section of drying and processing, drying temperature
For 50 DEG C, drying time is 1.5min.
Comparative example 7：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, using one section of drying and processing, drying temperature
For 80 DEG C, drying time is 1min.
Comparative example 8：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, first paragraph drying, second segment drying, the 3rd
The drying temperature of section drying is followed successively by 50 DEG C, 35 DEG C, 30 DEG C；Dried by first paragraph, second segment drying, the 3rd section drying when
Between be respectively 5s, 5s, 10s.
Comparative example 9：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, first paragraph drying, second segment drying, the 3rd
The drying temperature of section drying is followed successively by 50 DEG C, 35 DEG C, 30 DEG C；Dried by first paragraph, second segment drying, the 3rd section drying when
Between be respectively 20s, 25s, 30s.
Comparative example 10：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, first paragraph drying, second segment drying, the
The drying temperature of three sections of drying is followed successively by 95 DEG C, 65 DEG C, 60 DEG C；Dried by first paragraph, second segment drying, the 3rd section drying
Time is respectively 5s, 5s, 10s.
Comparative example 11：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, first paragraph drying, second segment drying, the
The drying temperature of three sections of drying is followed successively by 95 DEG C, 65 DEG C, 60 DEG C；Dried by first paragraph, second segment drying, the 3rd section drying
Time is respectively 20s, 25s, 30s.
Comparative example 12：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece is not contained in escape pipe 19.
Comparative example 13：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece chooses active carbon layer.
Comparative example 14：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece chooses sodium carbonate layer.
Comparative example 15：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece chooses neatly rock layers.
Comparative example 16：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece chooses cao layers.
Comparative example 17：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece chooses active carbon layer, sodium carbonate
Layer.
Comparative example 18：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece chooses active carbon layer, hydrotalcite
Layer.
Comparative example 19：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece chooses active carbon layer, calcium oxide
Layer.
Comparative example 20：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece chooses sodium carbonate layer, hydrotalcite
Layer.
Comparative example 21：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece chooses sodium carbonate layer, calcium oxide
Layer.
Comparative example 22：Manufacturing process is rolled up in pickling, and the difference with embodiment 1 is, adsorption piece chooses neatly rock layers, calcium oxide
Layer.
Experiment one：The mechanical robustness testing of strip
Subjects：The pickling coil of strip prepared using embodiment 1-16 is as test sample 1-16, using comparative example 1-11 systems
The standby pickling coil of strip obtained is used as control sample 1-11.
Test method：1st, each 10 groups of test sample 1-16 is chosen, each 10 groups of control sample 1-11 is chosen, observes and record test sample
The color and smooth degree on surface in 1-16, control sample 1-11, 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 1-16 is chosen, each 10 groups of control sample 1-11 is chosen, according to GB/T228.1-2010, to experiment
Sample 1-16, control sample 1-11 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 be such as in test sample 1-16
Shown in table 2；Surface color, surface smooth degree, situation of getting rusty, elongation percentage, yield strength are as shown in table 3 in control sample 1-11.
From table 2 and table 3, test sample 1-16 has smooth and white bright surface, in a humidity environment, is less prone to and gets rusty
Situation；Meanwhile, compared with test sample 1-11, also with preferable elongation percentage and yield strength.On the other hand, 1- in control sample
In 11, although control sample 1-2 has preferable outward appearance, but elongation percentage and yield strength ratio test sample 1 are poor；Although control sample 10-
11 have a preferable outward appearance, but in process of production, it is necessary to persistently provide higher drying temperature, add manufacture energy consumption and
Cost, is unfavorable for sustainable development.And control sample 3-9 outward appearance is poor, this be due to acid gas be neutralized processing speed it is inadequate
It hurry up, so as to cause acid gas to concentrate in descaling bath, strip overpickling caused, and control sample 3-9 elongation percentage, yield strength ratio
Corresponding elongation percentage, yield strength are poor in test sample 1.
Surface color, surface smooth degree, situation of getting rusty, elongation percentage, yield strength in the test sample 1-16 of table 2
Surface color, surface smooth degree, situation of getting rusty, elongation percentage, yield strength in the test sample 1-11 of table 3
Experiment two：The detection experiment of pH test paper
Subjects：Using the absorption tower in embodiment 17-20 as test sample 17-20, using the absorption in comparative example 12-22
Tower is used as control sample 12-22.
Test method：Used in the gas outlet of corresponding test sample and control sample and carry out pH value detection with a pH test paper,
Determination result, and record data analyzed.
Result of the test：In test sample 17-20, the numerical value that pH test paper is measured illustrates different adsorption layers in the range of 6-7
282 pairs of acid gas by gas outlet have preferable suction-operated so that from gas outlet discharge air in normal range value,
It is difficult to pollute operating environment, while also protecting operating personnel's healthy.And in control sample 12-22, pH test paper
The pH value range measured is 1-4, wherein, the acid gas not fallen by globule band essentially discharged in the gas outlet of control sample 12, pH
Most 1；And control sample is adsorbed in 13-16 from the acid gas of gas outlet discharge by a step, pH value is 2 or so；And control sample
In 17-22, the acid gas discharged from gas outlet is adsorbed by two steps, and pH value is 3-4, and different degrees of dirt is caused to operating environment
Dye, is also unfavorable for the personal safety in operating personnel.
Experiment three：Absorption tower service life experiment
Subjects：The pickling coil of strip prepared using embodiment 1-20 is prepared as test sample 1-20 using comparative example 1-5
The pickling coil of strip of acquisition is used as control sample 1-5.
Test method：Under conditions of daily normally using 12hr, the absorption in viewing test sample 1-20, control sample 1-5
The service life of tower.
Result of the test：In test sample 1-20, the service life on absorption tower is universal at 3 years or so, and the suction in control sample 1-5
Receive the service life of tower, only 0.5-1.It follows that the setting in the liquid collecting portion 21 in absorption tower, has to protection absorption tower
Important function, helps to extend the service life on absorption tower.
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 (10)
1. manufacturing process is rolled up in a kind of pickling, it is characterised in that comprised 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）Carry out pickling processes, the concentration of the hydrochloric acid solution that the pickling processes are used for
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 first paragraph descaling bath in the pickling processes
（71）, second segment descaling bath（72）, the 3rd section of descaling bath（73）, the 4th section of descaling bath（74）In the temperature of acid solution carry successively
It is high；The total time of the pickling processes is 8-15min；
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 three sections（Do not remain water stain etc.）Hot-air drying unit（9）At drying
Reason, passes sequentially through the first pinch roll and is sent to looping pit（10）, handle and transmitted through the second pinch roll by arc centralising device,
Bead cutter is sequentially passed through again（11）, three roller tensioners（12）, docking shears（13）, electrostatic oiler（14）, the second side lead device,
Turning, clamping and conveying roller, batch, unload volume, bundling is made；
The acid gas of pickling processes is pumped down to absorption tower and carries out neutralisation treatment in the step S2, and the absorption tower includes tower body
（16）, it is arranged at tower body（16）On feed tube（17）, drain pipe（18）, escape pipe（19）, it is arranged at tower body（16）Inside
Agitating device（20）, it is arranged at tower body（16）Bottom and with inner chamber（23）Liquid collecting portion（21）, with liquid collecting portion（21）It is interior
Chamber（23）The alkali liquor pipe of connection（22）；The liquid collecting portion（21）Outer wall and tower body（16）Inwall closely abut and liquid collecting portion
（21）Inwall on offer and inner chamber（23）The through hole of connection（24）, the liquid collecting portion（21）For polytetrafluoroethylene (PTFE) material；Institute
State tower body（16）It is internally provided with spray equipment；
Coils of hot-rolled steel in the step S1 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.
2. manufacturing process is rolled up in pickling according to claim 1, it is characterised in that the liquid collecting portion（21）On be provided with ridge
（25）, the tower body（16）Inwall on be provided with stopper slot（26）, the ridge（25）It is inserted in stopper slot（26）It is interior.
3. manufacturing process is rolled up in pickling according to claim 1, it is characterised in that the spray equipment includes level and sprays part
（271）With vertical spray part, the vertical spray part sprays part with level（271）Connection is set.
4. manufacturing process is rolled up in pickling according to claim 3, it is characterised in that the level sprays part（271）Including curved
Curved tube（2711）Peaceful straight tube（2712）, the swan-neck（2711）Along tower body（16）Inside crooked radian set；It is described
Vertical spray part includes some VERTICAL TUBEs（272）, the VERTICAL TUBE（272）Spaced set is in swan-neck（2711）On, institute
State swan-neck（2711）, straight pipe（2712）, VERTICAL TUBE（272）On be provided with shower nozzle.
5. manufacturing process is rolled up in pickling according to claim 1, it is characterised in that the escape pipe（19）It is internally provided with suction
Attached portion（28）, the adsorption section（28）Including sleeve（281）Be arranged at sleeve（281）Internal adsorption piece, the adsorption piece
Adsorption layer including multiple-layer stacked（282）.
6. manufacturing process is rolled up in pickling according to claim 5, it is characterised in that the adsorption layer（282）For active carbon layer,
At least three kinds in sodium carbonate layer, neatly rock layers, cao layers.
7. manufacturing process is rolled up in pickling according to claim 1, it is characterised in that in the step S4, three sections of hot-air seasonings
Device（9）Drying process includes first paragraph drying, second segment drying, the 3rd section of drying, and the first paragraph drying, second segment dry
Dry, the 3rd section of drying drying temperature is followed successively by 70-90 DEG C, 45-55 DEG C, 40-45 DEG C；Dried by first paragraph, second segment dries
Dry, the 3rd section of drying time is respectively 12-15s, 10-18s, 15-20s.
8. 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 hydrochloric acid solution is 17.5-21.0%, and the temperature of hydrochloric acid solution is 23-28 DEG C, salt
The pickling time of acid solution is 1-1.5min；
Second segment descaling bath（72）In, the concentration of hydrochloric acid solution is 12-17.4%, and the temperature of hydrochloric acid solution is 35-45 DEG C, hydrochloric acid
The pickling time of solution is 2-3.5min；
3rd section of descaling bath（73）In, the concentration of hydrochloric acid solution is 8.6-11.9%, and the temperature of hydrochloric acid solution is 50-57 DEG C, hydrochloric acid
The pickling time of solution is 2-5min；
4th section of descaling bath（74）In, the concentration of hydrochloric acid solution is 4.5-8.5%, and the temperature of hydrochloric acid solution is 60-65 DEG C, hydrochloric acid
The pickling time of solution is 3-5min.
9. manufacturing process is rolled up in pickling according to claim 1, it is characterised in that the width of the coils of hot-rolled steel in the step S1
Width is 1000-1300mm；During pickling processes in the step S2, the transfer rate of aligning strip is 80-120m/min.
10. manufacturing process is rolled up in pickling according to claim 1, it is characterised in that the spray equipment is arranged at inlet
Top.
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