CN107268012B - Manufacturing process is rolled up in pickling - Google Patents
Manufacturing process is rolled up in pickling Download PDFInfo
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- CN107268012B CN107268012B CN201710446704.5A CN201710446704A CN107268012B CN 107268012 B CN107268012 B CN 107268012B CN 201710446704 A CN201710446704 A CN 201710446704A CN 107268012 B CN107268012 B CN 107268012B
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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
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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
- C22C38/002—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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- 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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- 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
The invention discloses a kind of pickling to roll up manufacturing process, comprising: S1 obtains aligning strip by coils of hot-rolled steel by uncoiling, compacting, aligning；Aligning coil of strip is passed sequentially through four sections of descaling baths and carries out pickling processes, obtains pickling processes strip by S2；The acid gas of pickling processes is pumped down to absorption tower and is neutralized, and absorption tower includes tower body, and inlet tube, outlet tube, the escape pipe being set on tower body are set to the agitating device of the inside of tower body, is set to tower body bottom and the liquid collecting portion with inner cavity；Pickling processes strip is passed sequentially through four sections of rinsing bowls and carries out washing process, obtains washing process strip by S3；Washing process strip is dried by S4 through three sections of hot-air drying units, is passed sequentially through looping pit, bead cutter, docking shears, electrostatic oiler, is batched, unloads volume, bundling is made；The present invention have make strip pickling sufficiently and acid gas is effectively treated, be not easy that acid gas is made to leak in operating environment the advantages of 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 technique
Pickling is very important process in process for producing cold rolled strip steel, the purpose is to remove the iron oxide of belt steel surface,
Adjusting weight of coil cuts off raw edges, and qualified blank is provided for milling train, is produced with guaranteeing that cold rolling function successfully produces qualified strip
Product.Wherein, plug-type pickling lines are a kind of pickling units of noncontinuity, relative to continuous acid-washing production line, have and throw
Money less, unit equipment it is simple, to strip variety variations it is adaptable, easy to operate, easy to maintain the advantages that, be suitble to medium and small cold rolling
Factory uses.
In entire plug-type pickling group, pickling processes are more crucial.In acid cleaning process, acid solution can shape after being heated
At 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, 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 descaling bath cannot be discharged in acid gas in time, easily cause the pickling processes degree of belt steel surface excessive and
Phenomena such as causing overpickling.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of pickling volume manufacturing process, having makes
Strip pickling is abundant and acid gas is effectively treated, and being not easy, which leaks to acid gas in operating environment, endangers the excellent of operator's health
Point.
To achieve the above object, the present invention provides the following technical scheme that
A kind of pickling volume manufacturing process, includes the following steps:
Coils of hot-rolled steel is passed through uncoiler and slewing rollers one after pressure roller and recurvation roll pressing by uncoiler uncoiling by S1
Same-action leads device by the first side and is sent to nine roller pinch straighteners aligning, obtains aligning strip；
The aligning coil of strip obtained in step S1 is passed sequentially through first segment descaling bath, second segment descaling bath, third section acid by S2
Washing trough, the 4th section of descaling bath carry out pickling processes, and the concentration for the hydrochloric acid solution that the pickling processes use is 4.5-21.0%, institute
State first segment descaling bath, second segment descaling bath, third section descaling bath, acid solution in the 4th section of descaling bath concentration successively reduce,
In the pickling processes temperature of acid solution be 23-65 DEG C, the first segment descaling bath, second segment descaling bath, third section descaling bath,
The temperature of acid solution in 4th section of descaling bath successively improves；The total time of the pickling processes is 8-15min；
The pickling processes strip obtained in step S2 is passed sequentially through four sections of rinsing bowls and carries out washing process by S3, wherein the
One section of rinsing bowl, second segment rinsing bowl, third section rinsing bowl are all made of cold water wash, and the 4th section of rinsing bowl is cleaned using hot water,
Obtain washing process strip；
The washing process strip obtained in step S3 is dried by S4 through three sections of hot-air drying units, passes sequentially through
One pinch roller is sent to looping pit, by arc centralising device handle and through the second pinch roller transmit, then successively by bead cutter,
Three roller tensioners, docking shears, electrostatic oiler, 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 is neutralized in the step S2, and the absorption tower includes tower
Body, inlet tube, outlet tube, the escape pipe being set on tower body, is set to the agitating device of the inside of tower body, is set to tower body bottom
Portion and the liquid collecting portion with inner cavity, the alkali liquor pipe being connected to the inner cavity in liquid collecting portion；The outer wall in the liquid collecting portion and the inner wall of tower body
Close to abut and offer on the inner wall in liquid collecting portion the through-hole being connected to inner cavity, the liquid collecting portion is polytetrafluoroethylene (PTFE) material；Institute
It states tower body and is internally provided with spray equipment；
Coils of hot-rolled steel in the step S1 includes the carbon of 0.030-0.040wt%, the silicon of 0.045-0.085wt%,
The manganese of 0.20-0.29wt%, the phosphorus of 0.015-0.025wt%, the sulphur of 0.010-0.020wt%, 0.030-0.045wt%'s
Aluminium.
Through the above technical solutions, by uncoiler, slewing rollers, nine roller pinch straightener collective effects, by coils of hot-rolled steel
It is sufficiently spread out, and by the oxide layer ruptures of the belt steel surface after expansion, removes removing oxide layer convenient for later period pickling.
In pickling processes, pass through first segment descaling bath, second segment descaling bath, third section descaling bath, the 4th section of descaling bath
It cooperates, and first segment descaling bath, second segment descaling bath, third section descaling bath, hydrochloric acid solution in the 4th section of descaling bath
Concentration successively reduces, first segment descaling bath, second segment descaling bath, third section descaling bath, acid solution in the 4th section of descaling bath temperature
Degree successively improves, and facilitates the oxide layer for sufficiently removing belt steel surface, its surface is made not remain iron rust；
Since in pickling processes, the temperature of hydrochloric acid solution is different, it may appear that different degrees of acid gas, it is regular by air pump
Acid gas is pumped into absorption tower.Lye is transported by alkali liquor pipe into the cavity in liquid collecting portion, then by through-hole from cavity to
It is flowed in the groove that liquid collecting portion is formed.Water sprays out from spray equipment, in conjunction with into the acid gas inside absorption tower, forms acid
Liquid is flow in liquid collecting portion, and under the action of agitating device, neutralization reaction occurs with lye, to make to enter inside absorption tower
Acid gas is by quick and good processing.And liquid collecting portion is made of polytetrafluoroethylene material, acid and alkali-resistance, has longer use
Time limit, and reduce corrosion of the acid solution of lye and formation to tower body inner wall, to play a protective role to tower body inner wall.
In addition, liquid collecting portion has the function of storing lye, and when lye is discharged from through-hole, it may appear that phenomena such as turbulent flow,
Help that more sufficient neutralization reaction occurs with acid solution.
After acid gas in tower forms acid solution and neutralizes with lye, the air pressure in tower declines, when first segment descaling bath, second segment
When descaling bath, third section 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.It should
Scheme not only makes first segment descaling bath, second segment descaling bath, third section 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 sufficiently removed, and is less prone to since acid gas is excessive, descaling bath
Internal pressure is excessive and causes the phenomenon that leaking, and helps to maintain good operating environment, while also contributing to protection operator
The health of human body of work.After acid solution and lye neutralize, discharged by outlet tube.
It is dried using three sections of hot-air drying units, not only can achieve sufficiently removal through pickling processes and washing process
The moisture of belt steel surface afterwards does not remain its surface water stain, and carries out electrostatic convenient for the later period and be coated with processing.
Further preferably are as follows: it is provided with ridge in the liquid collecting portion, limiting slot is provided on the inner wall of the tower body, it is described
Ridge is inserted in limiting slot.
Through the above technical solutions, the cooperation of ridge and limiting slot, improves the stability in liquid collecting portion, help to reduce collection
The offset in liquid portion.
Further preferably are as follows: the spray equipment includes horizontal spray part and vertical spray part, the vertical spray part and
Level spray part connection setting.
Through the above technical solutions, horizontal spray part and vertical spray part cooperate, increase the range of spray, make into
The droplet that entering the acid gas inside tower body can be sprayed out rapidly and sufficiently combines, and forms acid solution, and then rapidly reduce tower body
Internal pressure, the superfluous acid gas facilitated inside each section of descaling bath is entered inside tower body by inlet tube, and then is facilitated
Make the phenomenon that overpickling is but less prone to by abundant pickling by the belt steel surface of descaling bath.
Further preferably are as follows: the horizontal spray part includes swan-neck and straight pipe, and the swan-neck is along the inside of tower body
Crooked radian setting；The vertical spray part includes several vertical pipes, the vertical pipe spaced set on swan-neck,
The swan-neck, straight pipe are provided with spray head in vertical pipe.
Through the above technical solutions, the range of spray tube spray is further increased, to increase the water of spray tube ejection
Contact range between pearl and acid gas.
Further preferably are as follows: the escape pipe is internally provided with adsorption section, and the adsorption section includes sleeve and is set to set
Adsorption piece inside cylinder, the adsorption piece includes the adsorption layer of multiple-layer stacked.
Through the above technical solutions, being the pressure of compensation tower inside and outside, it is provided with escape pipe.Since part acid gas can pass through
Escape pipe discharges outward, and adsorption piece carries out adsorption treatment to by the acid gas of escape pipe, reduces what acid gas was discharged from escape pipe
It may.Achieve the purpose that reduce tower body internal pressure, and also contributes to the clean level of operating environment.
Further preferably are as follows: the adsorption layer be active carbon layer, sodium carbonate layer, neatly rock layers, in cao layers at least
Three kinds.
Through the above technical solutions, active carbon in conjunction with the acid gas containing moisture, plays the role of adsorbing acid gas；And carbonic acid
Sodium layer reacts in conjunction with hydrochloric acid acid gas, to form carbon dioxide；And neatly rock layers, cao layers etc. can play absorption
The effects of hydrochloric acid acid gas, carbon dioxide, further reduced the pollution of air discharge.
Further preferably are as follows: in the step S4, it includes first segment drying, second that three sections of hot-air drying units, which are dried,
Section drying, the drying of third section, the first segment drying, second segment are dried, the drying temperature of third section drying is followed successively by 70-90
℃,45-55℃,40-45℃；Time by first segment drying, second segment drying, the drying of third section is respectively 12-15s, 10-
18s、15-20s。
(test one) discovery through the above technical solutions, studied is passing through above-mentioned temperature and corresponding drying time
After first segment drying, second segment drying, third section drying and processing, it is not easy to make the table of the strip after pickling processes and washing process
Face carries remaining acid solution and droplet, and helps to improve the bright and clean effect to belt steel surface.
Further preferably are as follows: in four sections of descaling baths in the step S2,
In first segment 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, salt
The pickling time of acid solution 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
The pickling time of solution is 2-3.5min；
In third section 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, salt
The pickling time of acid solution 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
The pickling time of solution is 3-5min.
Through the above technical solutions, aligning strip is initially entered into first segment descaling bath, the concentration of hydrochloric acid solution is higher, but
Its temperature is lower, and pickling time is more of short duration, is easier to significantly remove the iron rust ingredient of belt steel surface；Second segment descaling bath and
The concentration of hydrochloric acid solution in three sections of descaling baths is successively reduced than the concentration of the hydrochloric acid solution in first segment descaling bath, and hydrochloric acid is molten
The temperature of liquid gradually rises, and the processing time gradually increases, and is reducing to the removal dynamics of the iron rust of belt steel surface, is not easy to not giving birth to
The strip of rust causes to 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 removes, and achievees the effect that the oxide layer for sufficiently removing belt steel surface, not in remained on surface iron rust.
Further preferably are as follows: the wide cut of the coils of hot-rolled steel in the step S1 is 1000-1300mm；In the step S2
During pickling processes, the transmission speed for aligning strip is 80-120m/min.
Through the above technical solutions, wide cut changes greatly, is conducive to meet demand of the client to the strip of different wide cuts, mention
The high wide in range property of operation.The transmission speed range is relatively stable, facilitates the strip held stationary for making to carry out pickling processes
Transport effect, it helps improve the effectiveness of strip pickling processing, phenomena such as overpickling or deficient pickling occurs in reduction.
Further preferably are as follows: the spray equipment is set to the top of inlet.
Through the above technical solutions, acid gas enters to inside tower body from inlet, the water that spray equipment sprays is from the top down
Effect, helps sufficiently to combine acid gas, so that acid gas and droplet be made to form acid solution.And the acid solution formed is not easy to overflow from inlet
Out, to be not easy to enter acid solution influence acid gas inside tower body.
In conclusion the invention has the following advantages:
1. acid gas to be recycled to and quickly and efficiently handled acid gas, having makes strip pickling sufficiently but is not easy strip
Existing overpickling phenomenon；
2. being not easy, which leaks to acid gas, endangers operator's health in operating environment；
3. extending the service life on absorption tower.
Detailed description of the invention
Fig. 1 is the flow diagram of embodiment 1；
Fig. 2 is the structural schematic diagram of embodiment 1, is mainly used for embodying the structure of tower body, inlet tube, outlet tube, escape pipe；
Fig. 3 is the partial sectional view of tower body in embodiment 1, is mainly used for embodying liquid collecting portion, alkali liquor pipe, inner cavity, through-hole, limit
The structure of position slot；
Fig. 4 is the structural schematic diagram of embodiment 1, be mainly used for embodiment level spray part, swan-neck, straight pipe, vertical pipe,
The structure of ridge；
Fig. 5 is the structural schematic diagram of embodiment 1, be mainly used for embody adsorption section, sleeve, adsorption layer, fixture block, card slot knot
Structure.
In figure, 1, uncoiler；2, pressure roller；3, anti-bending roll；5, slewing rollers；6, nine roller pinch straightener；71, first segment pickling
Slot；72, second segment descaling bath；73, third section descaling bath；74, the 4th section of descaling bath；8, rinsing bowl；9, hot-air drying unit；
10, looping pit；11, bead cutter；12, three roller tensioner；13, docking shears；14, electrostatic oiler；15, entrance shearing machine；16, tower
Body；17, inlet tube；18, outlet tube；19, escape pipe；20, agitating device；21, liquid collecting portion；22, alkali liquor pipe；23, inner cavity；24,
Through-hole；25, ridge；26, limiting slot；271, horizontal spray part；2711, swan-neck；2712, straight pipe；272, vertical pipe；28,
Adsorption section；281, sleeve；282, adsorption layer；29, fixture block；30, card slot.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
Embodiment 1: pickling volume manufacturing process includes the following steps: with reference to Fig. 1
S1 passes through the coils of hot-rolled steel that wide cut is 1000-1300mm (ingredient and its corresponding parts by weight are as shown in table 1)
1 uncoiling of uncoiler tiltedly cuts processing by entrance shearing machine 15, then after pressure roller 2 and anti-bending roll 3 are suppressed, passes through uncoiler and steering
5 one same-action of roller leads device by the first side and is sent to nine roller pinch straighteners 6 and aligns, and obtains aligning strip, and align strip with
The transmission speed of 80-120m/min is transmitted；
The aligning coil of strip obtained in step S1 is passed sequentially through first segment descaling bath 71, second segment descaling bath 72, third by S2
Section descaling bath 73, the 4th section of descaling bath 74 carry out pickling processes, and acid gas is pumped down to absorption tower and is neutralized；
Wherein, in first segment descaling bath 71, the concentration of hydrochloric acid solution is 17.5%, and the temperature of hydrochloric acid solution is 28 DEG C, salt
The pickling time of acid solution 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, hydrochloric acid solution
Pickling time is 2.8min；
In third section descaling bath 73, the concentration of hydrochloric acid solution is 8.6%, and the temperature of hydrochloric acid solution is 57 DEG C, hydrochloric acid solution
Pickling time be 5min；
In 4th section of descaling bath 74, the concentration of hydrochloric acid solution is 4.5%, and the temperature of hydrochloric acid solution is 65 DEG C, hydrochloric acid solution
Pickling time be 5min；
S3, wherein it is 20 DEG C cold that first segment rinsing bowl 8, second segment rinsing bowl 8, third section rinsing bowl 88, which are all made of temperature,
Water cleaning, the 4th section of rinsing bowl 8, which is used, to be heated to temperature by graphite heater and is cleaned for 60 DEG C of hot water, is washed
Handle strip；
The washing process strip obtained in step S3 is dried, wherein first by S4 through three sections of hot-air drying units 9
The drying temperature that section drying, second segment drying, third section are dried is followed successively by 70 DEG C, 45 DEG C, 40 DEG C；Pass through first segment drying, the
The time that two sections of drying, third section are dried is respectively 12s, 10s, 15s；Strip after drying passes sequentially through the first pinch roller biography
It send to looping pit 10, handled by arc centralising device and is transmitted through the second pinch roller, then successively by bead cutter 11, three rollers
Power device 12, docking shears 13, electrostatic oiler 14, second side lead device, turning, clamping and conveying roller, batch, unload volume, and bundling is made；
Referring to Fig. 2, absorption tower includes tower body 16, with the inlet tube 17 and escape pipe 19 being connected to inside tower body 16.Referring to figure
3, it is internally provided with agitating device 20 in tower body 16, the bottom inside tower body 16, which is connected with one, to be had inner cavity 23 and use
The shape in liquid collecting portion 21 made of polytetrafluoroethylene (PTFE), the liquid collecting portion 21 is identical as the shape of 16 bottom of tower body, outer wall and tower body
16 inner wall closely abuts, and the through-hole 24 being connected to inner cavity 23 is offered on its inner wall.Two are provided with below tower body 16
The alkali liquor pipe 22 that root is connected to inner cavity 23；Spray equipment is provided with inside the tower body 16 in liquid collecting portion 21 and above being located in the liquid inlet.
16 bottom of tower body is provided with outlet tube 18, which is arranged through liquid collecting portion 21.In 17, two alkali liquor pipes 22 of inlet tube
On be respectively connected with air pump, be respectively used to when needed be pumped into acid gas and be sent into lye.
Referring to Fig. 4, it is provided projectingly a ridge 25 on the outer wall in liquid collecting portion 21, has been offered on the inner wall of 16 bottom of tower body
Limiting slot 26, and ridge 25 is inserted in limiting slot 26 (referring to Fig. 2).
Referring to Fig. 4, spray equipment includes level spray part 271 and vertical spray part, sprays part and horizontal spray part vertically
271 connection settings.Level spray part 271 includes two swan-necks symmetrical and along the setting of the crooked radian of the inside of tower body 16
2711 and the straight pipe 2712 that is arranged between two swan-necks 2711.Vertical spray part includes eight vertical pipes 272, and every
Equidistantly it is provided with and communicated with four vertical pipes 272 on swan-neck 2711, and vertical pipe 272 is to tower body 16 (this figure is not shown) bottom
Portion extends.Straight pipe 2712, vertical pipe 272 are provided with spray head on swan-neck 2711.
Referring to Fig. 5, an adsorption section 28 is arranged with inside escape pipe 19, which includes sleeve 281 and card
The adsorption piece being located inside sleeve 281, the adsorption piece include along escape pipe 19 from inside to outside successively the horizontal active carbon layer stacked,
Sodium carbonate layer, neatly rock layers.It is provided with fixture block 29 on the outer wall of sleeve 281, and offers L shape on the inner wall of gas outlet
Card slot 30.Active carbon layer, sodium carbonate layer, neatly rock layers successively stack and outer wall is closely abutted with the inner wall of sleeve 281, then will
Fixture block 29 on sleeve 281 rotates horizontally after placing downwards along card slot 30, realize entirety that sleeve 281 and adsorption piece are formed with
Along axial fixation between gas outlet.
Embodiment 2-4: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, the ingredient of coils of hot-rolled steel and its corresponding
Parts by weight are as shown in table 1.
The ingredient of coils of hot-rolled steel and its corresponding parts by weight in 1 embodiment 1-4 of table
Embodiment 5: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in first segment descaling bath 71,
The concentration of hydrochloric acid solution is 19%, and the temperature of hydrochloric acid solution is 25 DEG C, and the pickling time of hydrochloric acid solution is 1.2min.
Embodiment 6: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in first segment descaling bath 71,
The concentration of hydrochloric acid solution is 21.0%, and the temperature of hydrochloric acid solution is 23 DEG C, and the pickling time of hydrochloric acid solution is 1min.
Embodiment 7: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in second segment descaling bath 72,
The concentration of hydrochloric acid solution is 15%, and the temperature of hydrochloric acid solution is 40 DEG C, and the pickling time of hydrochloric acid solution is 2min.
Embodiment 8: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 is, in second segment descaling bath 72,
The concentration of hydrochloric acid solution is 17.4%, and the temperature of hydrochloric acid solution is 35 DEG C, and the pickling time of hydrochloric acid solution is 3.5min.
Embodiment 9: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in third section descaling bath 73,
The concentration of hydrochloric acid solution is 10.2%, and the temperature of hydrochloric acid solution is 53 DEG C, and the pickling time of hydrochloric acid solution is 2.5min.
Embodiment 10: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in third section descaling bath 73,
The concentration of hydrochloric acid solution is 11.9%, and the temperature of hydrochloric acid solution is 57 DEG C, and the pickling time of hydrochloric acid solution is 5min.
Embodiment 11: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in the 4th section of descaling bath 74,
The concentration of hydrochloric acid solution is 6.5%, and the temperature of hydrochloric acid solution is 63 DEG C, and the pickling time of hydrochloric acid solution is 4.5min.
Embodiment 12: a kind of manufacturing process of pickling coil of strip, the difference with embodiment 1 are, in the 4th section of descaling bath 74,
The concentration of hydrochloric acid solution is 8.5%, and the temperature of hydrochloric acid solution is 60 DEG C, and the pickling time of hydrochloric acid solution is 3min.
Embodiment 13: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, first segment 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；It is dried by first segment drying, second segment drying, third section
Time is respectively 13s, 15s, 18s.
Embodiment 14: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, first segment 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；It is dried by first segment drying, second segment drying, third section
Time is respectively 13s, 15s, 18s.
Embodiment 15: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, first segment drying, second segment drying, the
The drying temperature of three sections of drying is followed successively by 85,47 DEG C, 44 DEG C；By first segment drying, second segment drying, third section drying when
Between be respectively 11s, 13s, 12s.
Embodiment 16: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, first segment 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；It is dried by first segment drying, second segment drying, third section
Time is respectively 15s, 18s, 20s.
Embodiment 17: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece includes active carbon layer, sodium carbonate
Layer, cao layers.
Embodiment 18: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece includes active carbon layer, hydrotalcite
Layer, cao layers.
Embodiment 19: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece includes sodium carbonate layer, hydrotalcite
Layer, cao layers.
Embodiment 20: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece includes active carbon layer, sodium carbonate
Layer, neatly rock layers, cao layers.
Comparative example 1: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, it is not provided with liquid collecting portion 21.
Comparative example 2: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, the liquid collecting portion 21 of setting is iron and steel material quality.
Comparative example 3: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, it is only straight containing two in spray equipment
Pipe 2712.
Comparative example 4: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, in spray equipment, only containing two bendings
Pipe 2711.
Comparative example 5: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, it is only vertical containing eight in spray equipment
Pipe 272.
Comparative example 6: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, using one section of drying and processing, drying temperature
It is 50 DEG C, drying time 1.5min.
Comparative example 7: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, using one section of drying and processing, drying temperature
It is 80 DEG C, drying time 1min.
Comparative example 8: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, first segment drying, second segment drying, third
The drying temperature of section drying is followed successively by 50 DEG C, 35 DEG C, 30 DEG C；By first segment drying, second segment drying, third section drying when
Between be respectively 5s, 5s, 10s.
Comparative example 9: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, first segment drying, second segment drying, third
The drying temperature of section drying is followed successively by 50 DEG C, 35 DEG C, 30 DEG C；By first segment drying, second segment drying, third section drying when
Between be respectively 20s, 25s, 30s.
Comparative example 10: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, first segment 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；It is dried by first segment drying, second segment drying, third section
Time is respectively 5s, 5s, 10s.
Comparative example 11: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, first segment 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；It is dried by first segment drying, second segment drying, third section
Time is respectively 20s, 25s, 30s.
Comparative example 12: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece is not contained in escape pipe 19.
Comparative example 13: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece chooses active carbon layer.
Comparative example 14: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece chooses sodium carbonate layer.
Comparative example 15: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece chooses neatly rock layers.
Comparative example 16: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece chooses cao layers.
Comparative example 17: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece chooses active carbon layer, sodium carbonate
Layer.
Comparative example 18: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece chooses active carbon layer, hydrotalcite
Layer.
Comparative example 19: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece chooses active carbon layer, calcium oxide
Layer.
Comparative example 20: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece chooses sodium carbonate layer, hydrotalcite
Layer.
Comparative example 21: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece chooses sodium carbonate layer, calcium oxide
Layer.
Comparative example 22: manufacturing process is rolled up in pickling, the difference from embodiment 1 is that, adsorption piece chooses neatly rock layers, calcium oxide
Layer.
Test 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-
The 11 pickling coil of strips prepared are as control sample 1-11.
Test method: 1, choosing each 10 groups of test sample 1-16, chooses each 10 groups of control sample 1-11, observes and records 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 placed in wet
Degree be 85%RH, temperature is isoperibol lower 30 days of (25 ± 2) DEG C, observes the situation of getting rusty of each sample.
2, each 10 groups of test sample 1-16 are chosen, each 10 groups of control sample 1-11 are chosen, according to GB/T228.1-2010, to test
Sample 1-16, control sample 1-11 carry out the test of elongation percentage, yield strength respectively, record corresponding elongation percentage, yield strength, and make
Average treatment.
Test result: surface color, surface smooth degree, situation of getting rusty, elongation percentage, yield strength be such as in test sample 1-16
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.
By table 2 and table 3 it is found that there is test sample 1-16 smooth and white bright surface to be less prone to and get rusty in a humidity environment
The case where；Meanwhile compared with test sample 1-11, also there is preferable elongation percentage and yield strength.On the other hand, 1- in control sample
In 11, although control sample 1-2 has preferable appearance, elongation percentage and yield strength ratio test sample 1 are poor；Although control sample 10-
11 have preferable appearance, but in process of production, need to continue to provide higher drying temperature, increase manufacture energy consumption and
Cost is unfavorable for sustainable development.And the appearance of control sample 3-9 is poor, this is because the speed that acid gas is neutralized processing is inadequate
Fastly, it is concentrated in descaling bath so as to cause acid gas, strip overpickling is caused, and the elongation percentage of control sample 3-9, 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 2 test sample 1-16 of table
Surface color, surface smooth degree, situation of getting rusty, elongation percentage, yield strength in 3 test sample 1-11 of table
Test the detection test of two: pH test paper
Subjects: using the absorption tower in embodiment 17-20 as test sample 17-20, using in comparative example 12-22
Absorption tower is as control sample 12-22.
Test method: using in the gas outlet of corresponding test sample and control sample and carry out pH value detection with a pH test paper,
Determination is as a result, and recording data and being analyzed.
Test result: 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 have preferable suction-operated by the acid gas of gas outlet, so that the air being discharged from gas outlet is in normal range value,
It is not easy to pollute operating environment, while also protecting the health of operator.And in control sample 12-22, pH test paper
The pH value range measured is 1-4, wherein the acid gas not fallen by droplet band essentially being discharged in the gas outlet of control sample 12, pH
Most 1；And control sample is adsorbed from the acid gas of gas outlet discharge by a step in 13-16, pH value is 2 or so；And control sample
In 17-22, the acid gas being discharged from gas outlet is adsorbed by two steps, and pH value 3-4 causes different degrees of dirt to operating environment
Dye, the personal safety being also unfavorable in operator.
Test three: absorption tower service life test
Subjects: the pickling coil of strip prepared using embodiment 1-20 is as test sample 1-20, using comparative example 1-5
The pickling coil of strip prepared is as control sample 1-5.
Test method: absorption under conditions of daily normal use 12hr, in observation test sample 1-20, control sample 1-5
The service life of tower.
Test result: in test sample 1-20, the service life on absorption tower is generally 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 protection absorption tower
Important function facilitates the service life for extending absorption tower.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. manufacturing process is rolled up in a kind of pickling, which comprises the steps of:
S1 by uncoiler and turns coils of hot-rolled steel by uncoiler (1) uncoiling after pressure roller (2) and anti-bending roll (3) compacting
To (5) one same-action of roller, device is led by the first side and is sent to nine roller pinch straighteners (6) aligning, obtains aligning strip；
The aligning coil of strip obtained in step S1 is passed sequentially through first segment descaling bath (71), second segment descaling bath (72), third by S2
Section descaling bath (73), the 4th section of descaling bath (74) carry out pickling processes, the concentration of the hydrochloric acid solution that the pickling processes use for
4.5-21.0%, the first segment descaling bath (71), second segment descaling bath (72), third section descaling bath (73), the 4th section of descaling bath
(74) concentration of the acid solution in successively reduces, and the temperature of acid solution is 23-65 DEG C in the pickling processes, the first segment descaling bath
(71), second segment descaling bath (72), third section descaling bath (73), acid solution in the 4th section of descaling bath (74) temperature successively mention
It is high；The total time of the pickling processes is 8-15min；
The pickling processes strip obtained in step S2 is passed sequentially through four sections of rinsing bowls (8) and carries out washing process by S3, wherein the
One section of rinsing bowl (8), second segment rinsing bowl (8), third section rinsing bowl (8) are all made of cold water wash, and the 4th section of rinsing bowl (8) is adopted
It is cleaned with hot water, obtains washing process strip；
The washing process strip obtained in step S3 is dried through three sections of hot-air drying units (9), passes sequentially through first by S4
Pinch roller is sent to looping pit (10), handles by arc centralising device and transmits through the second pinch roller, then successively passes through trimming
Machine (11), three roller tensioners (12), docking shears (13), electrostatic oiler (14), second side lead device, turning, clamping and conveying roller, volume
It takes, unload volume, bundling is made；
The acid gas of pickling processes is pumped down to absorption tower and is neutralized in the step S2, and the absorption tower includes tower body
(16), inlet tube (17), outlet tube (18), the escape pipe (19) being set on tower body (16), are set to the inside of tower body (16)
Agitating device (20), be set to tower body (16) bottom and with inner cavity (23) liquid collecting portion (21), it is interior with liquid collecting portion (21)
The alkali liquor pipe (22) of chamber (23) connection；The outer wall of the liquid collecting portion (21) is closely abutted with the inner wall of tower body (16) and liquid collecting portion
(21) through-hole (24) being connected to inner cavity (23) is offered on inner wall, the liquid collecting portion (21) is polytetrafluoroethylene (PTFE) material；Institute
It states tower body (16) and is internally provided with spray equipment；
Coils of hot-rolled steel in the step S1 includes the carbon of 0.030-0.040wt%, the silicon of 0.045-0.085wt%, 0.20-
The manganese of 0.29wt%, the phosphorus of 0.015-0.025wt%, the sulphur of 0.010-0.020wt%, the aluminium of 0.030-0.045wt%.
2. manufacturing process is rolled up in pickling according to claim 1, which is characterized in that be provided with ridge on the liquid collecting portion (21)
(25), it is provided with limiting slot (26) on the inner wall of the tower body (16), the ridge (25) is inserted in limiting slot (26).
3. manufacturing process is rolled up in pickling according to claim 1, which is characterized in that the spray equipment includes horizontal spray part
(271) and vertical spray part, the vertical spray part are connected to setting with level spray part (271).
4. manufacturing process is rolled up in pickling according to claim 3, which is characterized in that horizontal spray part (271) includes curved
Curved tube (2711) and straight pipe (2712), the crooked radian setting of inside of the swan-neck (2711) along tower body (16)；It is described
Vertical spray part includes several vertical pipes (272), and vertical pipe (272) spaced set is on swan-neck (2711), institute
It states swan-neck (2711), straight pipe (2712), vertical pipe and is provided with spray head on (272).
5. manufacturing process is rolled up in pickling according to claim 1, which is characterized in that the escape pipe (19) is internally provided with suction
Attached portion (28), the adsorption section (28) include sleeve (281) and the adsorption piece for being set to sleeve (281) inside, the adsorption piece
Adsorption layer (282) including multiple-layer stacked.
6. manufacturing process is rolled up in pickling according to claim 5, which is characterized in that the adsorption layer (282) be active carbon layer,
Sodium carbonate layer, neatly rock layers, at least three kinds in cao layers.
7. manufacturing process is rolled up in pickling according to claim 1, which is characterized in that in the step S4, three sections of hot-air seasonings
It includes first segment drying, second segment drying, the drying of third section that device (9), which is dried, and the first segment drying, second segment dry
Dry, the drying of third section drying temperature is followed successively by 70-90 DEG C, 45-55 DEG C, 40-45 DEG C；It is dried by first segment drying, second segment
Dry, the drying of third section time is respectively 12-15s, 10-18s, 15-20s.
8. the manufacturing process of pickling volume according to claim 1, which is characterized in that four sections of descaling baths in the step S2
In,
In first segment descaling bath (71), 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；
In second segment descaling bath (72), 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；
In third section descaling bath (73), 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；
In 4th section of descaling bath (74), 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, which is characterized 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 transmission speed for aligning strip is 80-120m/min.
10. manufacturing process is rolled up in pickling according to claim 1, which is characterized in that the spray equipment is set to inlet
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| CN109208018B (en) * | 2018-11-06 | 2020-10-30 | 淮北微立淘科技有限公司 | Pickling process of copper and copper alloy special pipe |
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| CN202849063U (en) * | 2012-09-13 | 2013-04-03 | 天津渤化中河化工有限公司 | Absorption system for sulfuric acid production |
| CN103255429A (en) * | 2013-04-06 | 2013-08-21 | 莱芜市泰山冷轧板有限公司 | Pickling method of hot rolled steel strip |
| CN103394276A (en) * | 2013-08-05 | 2013-11-20 | 白占卿 | Acid gas treatment system and acid gas treatment method |
| JP6284813B2 (en) * | 2014-04-18 | 2018-02-28 | 株式会社神戸製鋼所 | Hot-rolled steel sheet with excellent cold workability and excellent hardness after processing |
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