CN107042239A - Production system is washed in a kind of tandem rolling continuous annealing that can switch many grade stainless strips online - Google Patents
Production system is washed in a kind of tandem rolling continuous annealing that can switch many grade stainless strips online Download PDFInfo
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- CN107042239A CN107042239A CN201710373505.6A CN201710373505A CN107042239A CN 107042239 A CN107042239 A CN 107042239A CN 201710373505 A CN201710373505 A CN 201710373505A CN 107042239 A CN107042239 A CN 107042239A
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- sulfuric acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
- B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0085—Joining ends of material to continuous strip, bar or sheet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/28—Drums or other coil-holders
- B21C47/30—Drums or other coil-holders expansible or contractible
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
- C25F1/06—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Optics & Photonics (AREA)
- Electrochemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The present invention provides a kind of tandem rolling continuous annealing that can switch many grade stainless strips online and washes production system, involved in by the raw steel of many grade stainless strips after the production system and then prepare different grades of stainless strip, the production system includes the decoiling equipment set gradually, welder, entry loop, rolling machine system, milling train kink, annealing cooling system, mechanical descaling system, cathodic pickling system, final cleaning and drying unit, outlet looping, planarization system and devices for taking-up, the cathodic pickling system includes being sequentially connected the precleaning unit of setting, sodium sulphate electrolysis unit, sulfuric acid washing device and nitration mixture acid dip pickle.Technical scheme is realized only can just produce the band of stainless steel NO.1,2E, 2B, 2D surface grade by a production line, and can realize the online production for being switched fast different surfaces grade and unlike material.
Description
Technical field
The present invention relates to a kind of stainless steel production system, more particularly to a kind of production stainless steel NO.1,2E, 2B, 2D surfaces
Production system is washed in the band tandem rolling continuous annealing of grade, and in particular to one kind can switch the production many material multi-surface grades of stainless steel online
Production system is washed in the tandem rolling continuous annealing of band.
Background technology
At present, stainless steel hot-rolling casting skin band obtains product after the processing of continuous annealing pickling lines, its surface etc.
Level is NO.1；Surface grade is 2E product, then is that two frames or three machines are set up before common continuous annealing pickling lines
The collateral support stressing device of frame carries out casting skin rolling for 18 cold mills of hydraulic.Downstream cold rolling process is with surface grade NO.1
Or 2E band is raw material, after cold continuous rolling or single milling train are rolled, rolling semi-finished product are gone to cold rolling special annealing
The finished product of 2B or 2D surface grades is obtained after pickling line processing.The production of above surface grade product is completed, existing process is set
It is standby to be configured with following deficiency：Longer technological process, more device configuration and larger investment, band circulation cycle length, into
Material rate is relatively low, production unlike material when switch steel grade time-consuming and need that the template thickness for shutting down, produce 2E plate faces is not good enough, produces
The flexibility of line reply turn of the market is not enough, energy consumption is higher, environmentally friendly configuration is not good enough.
It would therefore be highly desirable to propose a kind of stainless steel production system for solving above-mentioned defect in the prior art.
The content of the invention
It is guaranteed, can be flexibly met it is an object of the invention to provide a kind of dependable performance, environmental protection, low energy consumption, quality
The continuous process system of stainless steel unlike material different surfaces grade band production requirement, to solve work present in prior art
Skill flow is complicated, device configuration is more, production cost is high, band circulates, and cycle length, lumber recovery are relatively low, switch when producing unlike material
Steel grade time-consuming and need that the template thickness for shutting down, producing 2E plate faces is not good enough, the flexibility of production line reply turn of the market not enough,
The problems such as energy consumption is higher, environmentally friendly configuration is not good enough defect.
To achieve these goals, the present invention provides following technical scheme：
It is a kind of to switch the production system of many grade stainless strips online, by the raw material of many grade stainless strips
Coil of strip enters after the production system and then prepares different grades of stainless strip, and the production system includes setting gradually
Decoiling equipment, welder, entry loop, rolling machine system, milling train kink, annealing cooling system, mechanical descaling system, electrolysis
Pickling system, outlet looping, planarization system and devices for taking-up, the cathodic pickling system include being sequentially connected the prerinse of setting
Device, sodium sulphate electrolysis unit, sulfuric acid washing device and nitration mixture acid dip pickle.
The production system of many grade stainless strips can switched online as described above, be preferably, the rolling machine system
It is made up of successively eighteen-high mill device, the first brushing device and the degreasing plant for possessing drying function；Wherein, 18 roller
Rolling mill assembly is arranged on the exit of the entry loop, and the degreasing plant is arranged at the import of the milling train kink；Make
The eighteen-high mill device used for collateral support stressing device is 18 roller tandem mills of worm-gear endless-screw type.
The production system of many grade stainless strips can switched online as described above, be preferably, the mechanical descaling
System includes being sequentially connected the descaling mill, drying unit and shot-blasting machine of setting；Wherein, the descaling mill be arranged on it is described annealing it is cold
But the exit of system, the shot-blasting machine is arranged at the import of the cathodic pickling system；The descaling mill is wet type scale breading
Machine, the lower descaling rolls of the wet type descaling mill are fixed and added without governor motion, working roll and support roller using material GCr15
Work, hardening depth is up to 4~5mm.
The production system of many grade stainless strips can switched online as described above, be preferably, the decoiling equipment
To possess the big stroke harmomegathus uncoiler for reclaiming packing paper function；The welder is the Laser Welding for possessing laser cutting function
Machine；Final cleaning and drying unit are additionally provided between the cathodic pickling system and the outlet looping；The smooth system
System includes the planisher, smooth small kink, monitor station for being sequentially connected setting；The devices for taking-up is the volume for possessing cushioning paper function
Take device.
The production system of many grade stainless strips can switched online as described above, be preferably, in the sodium sulphate
The exit of electrolysis unit, the sulfuric acid washing device and the nitration mixture acid dip pickle is respectively arranged with the second brushing device,
Three brushing devices and the 4th brushing device；Wherein, the precleaning unit is arranged on the exit of the mechanical descaling system, institute
The 4th brushing device is stated to be arranged at the import of the outlet looping.
The production system of many grade stainless strips can switched online as described above, be preferably, the sodium sulphate electricity
Solution device is made up of the sulfuric acid natrium electrolytic cell, sodium sulphate circulating tank and sodium sulphate regenerating unit for being sequentially connected setting；Wherein, it is described
Second brushing device is arranged on the exit of the sulfuric acid natrium electrolytic cell；Circular electrolyte enters out of described sodium sulphate circulating tank
In the sodium sulphate regenerating unit, the regenerated liquid produced through the sodium sulphate regenerating unit is back to the sodium sulphate circulating tank
Interior, the crystal produced through the sodium sulphate regenerating unit is transported to sintering circuit and recycled, the sodium sulphate
The electrolyte circulated between circulating tank and the sulfuric acid natrium electrolytic cell is the sodium sulphate circulated, is easy to the stainless steel band
The electrolytic cleaned of material.
The production system of many grade stainless strips can switched online as described above, be preferably, the sulfuric acid washing
Device includes the sulfuric acid washing groove, sulfuric acid circulating tank and on-line filtration device for being sequentially connected setting；Wherein, the described 3rd dress is scrubbed
Put the exit for being arranged on the sulfuric acid washing groove；The on-line filtration device is equipment for separating liquid from solid；Sulfuric acid circulation fluid is from institute
State in sulfuric acid circulating tank and enter in the equipment for separating liquid from solid, the filtrate isolated through the equipment for separating liquid from solid is back to described
In sulfuric acid circulating tank, the filter cake isolated through the equipment for separating liquid from solid is transported to sintering circuit and recycled, described
Circulation fluid between sulfuric acid circulating tank and the sulfuric acid washing groove is the sulfuric acid circulated, is easy to the stainless strip
Chemical cleaning.
The production system of many grade stainless strips can switched online as described above, be preferably, the nitration mixture pickling
Device includes the nitration mixture descaling bath, nitration mixture circulating tank and on-line filtration device for being sequentially connected setting；Wherein, the described 4th dress is scrubbed
Put the exit for being arranged on the nitration mixture descaling bath；The on-line filtration device is equipment for separating liquid from solid；Nitration mixture circulation fluid is from institute
State in nitration mixture circulating tank and enter in the equipment for separating liquid from solid, the filtrate isolated through the equipment for separating liquid from solid is back to described
In nitration mixture circulating tank, the filter cake isolated through the equipment for separating liquid from solid is transported to sintering circuit and recycled, described
Circulation fluid between nitration mixture circulating tank and the nitration mixture descaling bath is the mixed acid circulated, is easy to the stainless strip
Chemical cleaning.
The production system of many grade stainless strips can switched online as described above, be preferably, in addition to：Waste mixed acid
Tank, waste mixed acid regenerative system and regenerated acid tank；Waste mixed acid in the nitration mixture circulating tank from the waste mixed acid tank is entered, then through pipe
Road is delivered to the waste mixed acid regenerative system, and the regenerated acid produced through the waste mixed acid regenerative system is delivered to the regenerated acid
Progress is needed to add in the nitration mixture circulating tank according to technique in tank, the iron powder quilt produced through the waste mixed acid regenerative system
Collection is transitted to sintering circuit and recycled.
The production system of many grade stainless strips can switched online as described above, be preferably, each nitration mixture section is matched somebody with somebody
There are two circulating tanks, two sets of heat exchangers, two circuits systems to be connected with acid tank, be easy to implement being switched fast for steel grade.
The production system of many grade stainless strips can switched online as described above, be preferably, many grades are not
Rust steel band is the stainless steel finished product that surface grade is NO.1,2B, 2D or 2E.
Compared with immediate prior art, the technical scheme that the present invention is provided has following excellent effect：
1st, technical scheme is realized only can just produce stainless steel NO.1,2E, 2B, 2D by a production line
The band of surface grade, and the online production for being switched fast different surfaces grade and unlike material can be realized.
2nd, the present invention is using big stroke harmomegathus uncoiler (band reclaim packing paper function), it is not necessary to extra configuration diameter increasing sleeve cylinder or
Increase footpath block, compared to more general uncoiler, its fluctuation applicability to hot-rolled black-skin supplied materials internal diameter is stronger, when production returns to volume not
Diameter increasing sleeve cylinder need to be torn open or increase footpath block.
3rd, the present invention is using laser cutting and laser welding technology, and lasing light emitter uses solid disc-type, and steel band is cut end to end
Each configuration laser cutting, and weld line and unit cross central line are had certain angle partially, with argon arc welding machine or general Laser Welding
Machine is compared, and this kind of technical scheme can solve the problems, such as slab shearing difficulty and blade chipping, it is ensured that welding quality, smooth welded seam light
Sliding, physical property meets rolling requirements, is not required to lift roller (temporarily stopping rolling) and crosses weld seam, directly roller welding can stitch and be not required to rolling force reduction
Or tension force before and after drop, weld seam is partially angled to make weld seam spirally be contacted with working roll in rolling, greatly reduction weld seam broken belt
Risk, adapts to the weld seam rolling of many material multi-surface class requirements and greatly improves the lumber recovery of various products.
4th, the present invention uses the eighteen-high mill that collateral support stressing device is arranged for the frame of worm-gear endless-screw type three, its collateral support
Stress can be resisted up to 100 tons.Compared to other tandem mills, technical scheme goes for the life of multi-surface grade
Production, and template is more preferably and tolerance is smaller, maximum can roll the wide * 8.0mm thickness of 1550mm, and casting skin maximum depression rate is up to 50%, in vain
Skin maximum depression rate can be achieved not stop to roll online roll change up to 60%.
5th, the present invention is designed with two sets of emulsion systems, can according to different plate face class requirements from different emulsions and
Different configuration concentrations, filtering is combined using Magnetic filtration device and vacuum filter.
6th, the present invention is provided with brushing device in milling train outlet, can switch the brush of unlike material according to different surfaces class requirement
Hair, can effectively remove plate face soil or loose scale, and convenient and saving rinse water is provided for follow-up surface treatment.
7th, the present invention uses wet type descaling mill, effectively inhibits iron scale dust, and belt steel surface wiping can be reduced to a certain degree and is drawn
Wound.Its structure uses lower descaling rolls to be fixed, no governor motion, is easy to operation, and on-site maintenance amount is small；Working roll and support roller
Processed using material GCr15, hardening depth is up to 4~5mm, it is allowed to which working roll and support roller repeatedly grind Reusability.
8th, the present invention may be implemented in production 2B, 2D using sodium sulphate electrolysis unit and sulfuric acid washing device is configured with simultaneously
The sodium sulphate that come into operation during surface is electrolysed, and come into operation sulfuric acid washing during production NO.1 or 2E surfaces, can also come into operation simultaneously former as processing
Expect the oxidation skin depth defect of casting skin.
The present invention carries out on-line filtration using solid-liquid separation technique to the acid solution in sour circulating tank, can greatly reduce sediment
Accumulation, acid solution activity, extension pickling duty cycle, reduction acid solution discharge are improved, the filter cake moisture content formed is low, can be easy to burn
Tie the recycling of process；Meanwhile, the technology greatly reduces roasting as the pretreatment of waste mixed acid spray roasting regeneration techniques
The risk of stove knot wall.
The present invention realizes the regeneration of nitric acid and hydrofluoric acid in waste mixed acid with waste mixed acid spray roasting regeneration techniques, to useless
Metal ion in nitration mixture is reclaimed in the form of oxide (powdery), is greatly reduced acid consumption and is mitigated neutralisation treatment and bears
Lotus, beneficial to the recovery of noble metal, remarkable in economical benefits.
The present invention uses selective catalytic reduction handling to nitration mixture waste gas, and the catalyst of its core is using environmental protection
Rare-earth type low temperature catalyst, reducing agent uses ammoniacal liquor, urea liquid used compared with than general vanadium Titanium series catalyst and reducing agent,
Its energy consumption is low, catalyst surface does not tend to have urea crystals or dust stratification, and the stable service life of catalytic effect is long, after catalyst is scrapped
For benign discarded object.
The nitration mixture acid dip pickle that the present invention is used has two sets of independent acid circulation can system, it is possible to achieve different steel grades are carried out
It is switched fast online.
9th, the planisher that the present invention is provided, reduction ratio meets the requirement of 2B/2D plate faces, while can improve up to 10%
The roughness of NO.1 plate faces.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not constitute inappropriate limitation of the present invention.Wherein：
Fig. 1 can switch the tandem rolling continuous annealing of the production many material multi-surface grade bands of stainless steel online for the embodiment of the present invention
Wash production system schematic diagram；
Fig. 2 is the rolling machine system schematic diagram in Fig. 1；
Fig. 3 is the annealing cooling system schematic diagram in Fig. 1；
Fig. 4 is the mechanical descaling system schematic in Fig. 1；
Fig. 5 is the cathodic pickling system schematic in Fig. 1；
Fig. 6 is the planarization system schematic diagram in Fig. 1.
Embodiment
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the application can be mutually combined.
In the description of the invention, term " longitudinal direction ", " transverse direction ", " on ", " under ", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " top ", " bottom " are, based on orientation shown in the drawings or position relationship, to be only
For the ease of the description present invention rather than require that the present invention must be therefore it is not intended that right with specific azimuth configuration and operation
The limitation of the present invention.The term " connected " that is used in the present invention, " connection " should be interpreted broadly, for example, it may be fixedly connected,
Can also be detachably connected；Can be joined directly together, can also be indirectly connected to by intermediate member, for the common of this area
For technical staff, the concrete meaning of above-mentioned term can be understood as the case may be.
As shown in figs 1 to 6, present invention offer is a kind of can switch the production system of many grade stainless strips online, by many
The raw steel of grade stainless strip involves in after production system and then prepares different grades of stainless strip, production system
Including the decoiling equipment set gradually, welder, entry loop, rolling machine system, milling train kink, annealing cooling system, machinery
Descaling system, cathodic pickling system, outlet looping, planarization system and devices for taking-up, cathodic pickling system include being sequentially connected setting
Precleaning unit, sodium sulphate electrolysis unit, sulfuric acid washing device and the nitration mixture acid dip pickle put.
In embodiments of the present invention, the different brackets stainless strip prepared refer to surface grade for NO.1,2B, 2D or
2E stainless steel finished product.The present invention can be realized only can just produce stainless steel NO.1,2E, 2B, 2D table by a production line
The band of face grade, and the production of online switching different surfaces grade and unlike material can be realized.
In embodiments of the present invention, rolling machine system by eighteen-high mill device, the first brushing device and possesses drying successively
The degreasing plant composition of function；Wherein, eighteen-high mill device is arranged on the exit of entry loop, and degreasing plant, which is arranged on, to be rolled
At the import of machine kink.
In embodiments of the present invention, the eighteen-high mill device used as collateral support stressing device is worm-gear endless-screw type
18 roller tandem mills.The present invention uses collateral support stressing device for worm-gear endless-screw type eighteen-high mill, and its collateral support stress can be supported
Resist up to 100 tons, arranged using three frames.Compared to other tandem mills (eighteen-high mill of such as cylinder type), the technical program
Go for the production of multi-surface grade, and the template produced is more preferable and tolerance is smaller, maximum can roll the wide * of 1550mm
8.0mm thickness, casting skin maximum depression rate is up to 50%, and white skin maximum depression rate can be achieved online roll change and do not stop to roll up to 60%.
In embodiments of the present invention, the first brushing device is arranged on the exit position of collateral support rolling mill assembly, can basis
Different surfaces class requirement switches the bristle of unlike material, effectively removes plate face soil or loose scale, is follow-up
Surface treatment provides convenient and saving rinse water.Preferably, the bristle of the first brushing device can use PPH or carborundum.
The present invention is designed with two sets of emulsion systems, can be according to different plate face class requirements from different emulsion and not
Same configuration concentration, filtering is combined using Magnetic filtration device and vacuum filter.
In embodiments of the present invention, mechanical descaling system includes being sequentially connected the descaling mill, drying unit and ball blast of setting
Machine；Wherein, descaling mill is arranged on the exit of annealing cooling system, and shot-blasting machine is arranged at the import of cathodic pickling system；It is broken
Squama machine is wet type descaling mill, and the lower descaling rolls of wet type descaling mill are fixed and used without governor motion, working roll and support roller
Material GCr15 is processed, and hardening depth is up to 4~5mm.
The factor that the type selecting of the wet type descaling mill of the present invention is considered is as follows：
1) harmful effect of the dry type descaling mill to surrounding environment is directed to, using wet type descaling mill, and using three roads spray
Moisture safety pin effectively inhibits iron scale dust to scale breading roller surface, belt steel surface and equipment cell body, while can reduce to a certain degree
Belt steel surface, which is wiped, to be scratched.
2) lower descaling rolls are used for fixed structure, without governor motion, for spray water environment, service life of equipment will be big
Big enhancing.
3) the problem of wet type descaling mill working roll service life is short is directed to, it is special that the sealing of working roll supporting roller bearing is carried out
Design, under the adverse circumstances that iron scale muddy water is mixed, it is ensured that the sufficient lubrication of working roll and supporting roller bearing, it is ensured that in work
Roller will not be changed in the support roller work period because of bearing problem, reach the service life of dry type descaling mill working roll, together
The working environment of Shi Gaishan descaling mills.
4) working roll and support roller are processed using material GCr15, and hardening depth is up to 4~5mm, it is allowed to working roll support roller
Multiple grinding roller Reusability.
In embodiments of the present invention, decoiling equipment is to possess the big stroke harmomegathus uncoiler for reclaiming packing paper function；Welding dress
It is set to the laser welder for possessing laser cutting function；Be additionally provided between cathodic pickling system and outlet looping final cleaning and
Drying unit；Planarization system includes the planisher, smooth small kink, monitor station for being sequentially connected setting；Devices for taking-up adds to possess
The devices for taking-up of packing paper function.
In embodiments of the present invention, decoiling equipment is big stroke harmomegathus uncoiler (packing paper function is torn in band selection open), it is not necessary to
Extra configuration diameter increasing sleeve cylinder increases footpath block, compared to general uncoiler, and its fluctuation applicability to hot-rolled black-skin supplied materials internal diameter is more
By force, it is not required to tear diameter increasing sleeve cylinder open when production returns to volume or increases footpath block, dismountable recovery packing paper.
In embodiments of the present invention, welder is the laser welder for possessing laser cutting function；The laser of laser welder
Source is solid disc-type, laser cutting is respectively configured with the cut place end to end of stainless strip, and set weld line horizontal with unit
There is certain angle to deviation between center line.Compared with argon arc welding machine or general laser welder, this kind of technical scheme can be solved
Slab shearing difficulty and blade chipping problem, it is ensured that welding quality, smooth welded seam is smooth, physical property meets rolling requirements, no
Roller (temporarily termination rolling) need to be lifted and cross weld seam, directly roller welding can stitch and be not required to rolling force reduction or the front and rear tension force of drop, weld seam is partially angled
Weld seam can be made spirally to be contacted with working roll in rolling, greatly reduction weld seam broken belt risk, adapt to many material multi-surface grades
It is required that weld seam rolling and greatly improve the lumber recoverys of various products.
In embodiments of the present invention, annealing cooling system is made up of annealing furnace and three-level cooling system, three-level cooling system
It is arranged on the exit of annealing furnace.Three-level cooling system is by being sequentially connected the air cooling device, mist device for cooling and water cooling plant of setting
Composition.Annealing furnace is arranged on milling train kink exit, and water cooling plant is arranged at the import of mechanical descaling system.
In embodiments of the present invention, in the exit of sodium sulphate electrolysis unit, sulfuric acid washing device and nitration mixture acid dip pickle
It is respectively arranged with the second brushing device, the 3rd brushing device and the 4th brushing device；Wherein, precleaning unit is arranged on machinery and removed
The exit of squama system, the 4th brushing device is arranged at the import of outlet looping.
In embodiments of the present invention, sodium sulphate electrolysis unit is followed by sulfuric acid natrium electrolytic cell, the sodium sulphate for being sequentially connected setting
Ring tank and sodium sulphate regenerating unit composition；Wherein, the second brushing device is arranged on the exit of sulfuric acid natrium electrolytic cell；Cyclic electrolysis
Liquid in sodium sulphate circulating tank from sodium sulphate regenerating unit is entered, and the regenerated liquid produced through sodium sulphate regenerating unit is back to sulphur
In sour sodium circulating tank, the crystal produced through sodium sulphate regenerating unit is transported to sintering circuit and recycled, sulfuric acid
The electrolyte circulated between sodium circulating tank and sulfuric acid natrium electrolytic cell is the sodium sulphate circulated, is easy to the electricity to stainless strip
Solution cleaning.
In embodiments of the present invention, sulfuric acid washing device includes sulfuric acid washing groove, the sulfuric acid circulating tank for being sequentially connected setting
With on-line filtration device；Wherein, the 3rd brushing device is arranged on the exit of sulfuric acid washing groove；On-line filtration device is solid-liquid point
From device；Sulfuric acid circulation fluid in sulfuric acid circulating tank from equipment for separating liquid from solid is entered, the filtrate isolated through equipment for separating liquid from solid
It is back in sulfuric acid circulating tank, the filter cake isolated through equipment for separating liquid from solid is transported to sintering circuit and recycled, sulphur
Circulation fluid between sour circulating tank and sulfuric acid washing groove is the sulfuric acid circulated, is easy to the Chemical cleaning to stainless strip.
In embodiments of the present invention, nitration mixture acid dip pickle includes nitration mixture descaling bath, the nitration mixture circulating tank for being sequentially connected setting
With on-line filtration device；Wherein, the 4th brushing device is arranged on the exit of nitration mixture descaling bath；On-line filtration device is solid-liquid point
From device；Nitration mixture circulation fluid in nitration mixture circulating tank from equipment for separating liquid from solid is entered, the filtrate isolated through equipment for separating liquid from solid
It is back in nitration mixture circulating tank, the filter cake isolated through equipment for separating liquid from solid is transported to sintering circuit and recycled, mixes
Circulation fluid between sour circulating tank and nitration mixture descaling bath is the mixed acid circulated, is easy to the chemistry to stainless strip clear
Wash.Preferably, the mixed acid is the mixed liquor of nitric acid and hydrofluoric acid.
In embodiments of the present invention, using sodium sulphate electrolysis unit and sulfuric acid washing device is configured with simultaneously, it may be implemented in
Come into operation sodium sulphate electrolysis during production 2B, 2D surface, and come into operation sulfuric acid washing during production NO.1 or 2E surfaces, can also be simultaneously using work
To handle the oxidation skin depth defect of raw material casting skin.
In embodiments of the present invention, further preferably also include：Waste mixed acid tank, waste mixed acid regenerative system and regenerated acid tank；
Waste mixed acid regenerates from waste mixed acid tank is entered in nitration mixture circulating tank, then through pipeline to waste mixed acid regenerative system through waste mixed acid
The regenerated acid that system is produced is delivered in regenerated acid tank needs progress to add in nitration mixture circulating tank according to technique, through waste mixed acid
The iron powder that regenerative system is produced, which is collected, to be transitted to sintering circuit and is recycled.
In embodiments of the present invention, the acid solution in sour circulating tank is carried out using separation of solid and liquid (fractionation technique of solid-liquid two)
On-line filtration, can greatly reduce precipitate bulk, improve acid solution activity, extension pickling duty cycle, reduction acid solution discharge, institute's shape
Into filter cake moisture content it is low, the recycling of sintering circuit can be easy to；Meanwhile, the technology regenerates skill as waste mixed acid spray roasting
The pretreatment of art, greatly reduces the risk of roaster knot wall.
In embodiments of the present invention, nitric acid and hydrofluoric acid in waste mixed acid are realized with waste mixed acid spray roasting regeneration techniques
Regeneration, the metal ion in waste mixed acid is reclaimed in the form of oxide (powdery), greatly reduce acid consumption and mitigate
The load of neutralisation treatment, beneficial to the recovery of noble metal.
Further preferably, each nitration mixture section is equipped with two circulating tanks, two sets heat exchangers, two circuits systems and acid tank company
Connect, be easy to implement being switched fast for steel grade.In embodiments of the present invention, the nitration mixture acid dip pickle of design has two sets of independent acid to follow
Ring can system, it is possible to achieve different steel grades are switched fast online.
In embodiments of the present invention, the handling to nitration mixture waste gas using SCR denitration technology, the catalyst of its core is adopted
With the rare-earth type low temperature catalyst of environmental protection, reducing agent uses ammoniacal liquor, and urine is used compared with than general vanadium Titanium series catalyst and reducing agent
Plain solution, its energy consumption is low, catalyst surface does not tend to have urea crystals or dust stratification, and the stable service life of catalytic effect is long, scraps
It is benign discarded object afterwards.
In embodiments of the present invention, entry loop, milling train kink, outlet looping, the small kink of planisher are both preferably horizontal
Type kink.
In embodiments of the present invention, it is additionally provided with drying unit between cathodic pickling system and outlet looping；Smooth system
System includes the planisher, smooth small kink, monitor station for being sequentially connected setting.Planisher is two rollers or four-roller planisher.Preferably,
The planisher is four-roller planisher, and reduction ratio meets the requirement of 2B/2D plate faces, while can improve NO.1 plate faces up to 10%
Roughness.
It is following by the behaviour of the production system of the present invention in order to be able to more specifically understand the production system of the embodiment of the present invention
It is described in detail as method, particular content is as follows：
The production system raw material of the present invention can be selected according to finished surface class requirement, and such as finished product is NO.1 or 2E
Surface, then raw material is hot-rolled black-skin；If finished product is 2B, 2D surface, then ingredient requirement is NO.1 surfaces.
Raw material coil of strip enters production line by decoiling equipment, by laser cutting to taking the lead that the magnetic tape trailer of preceding volume is rolled up with after
Laser welding is carried out after carrying out the high-precision shearing with drift angle.
Strip enters tandem mill by entry loop, is needed to choose whether rolling according to surface grade.When production NO.1 tables
During the grade of face, milling train does not come into operation；When producing 2E, 2B, 2D surface grade, put into milling train and needed to select pressure according to thickness
Distribution, maximum can roll the wide * 8.0mm thickness of 1550mm, and casting skin maximum depression rate is up to 50%, and white skin maximum depression rate is reachable
60%, it can be achieved not stop to roll online roll change.It is to be noted that：The system is designed with two emulsion systems, is respectively suitable for
2E, 2B/2D surface grade.
Strip has gone out after tandem mill, into the first brushing device, enters after removing plate face soil or loose scale
Degreasing plant (drying).It is pointed out that degreasing plant only drying function comes into operation when tandem mill does not come into operation, degreasing work(
It can not come into operation.
Strip goes out degreasing plant and entered into annealing furnace after milling train kink, and solutionizing processing is carried out in annealing furnace, goes out to move back
Cooled down after stove using three-level, i.e., air cooling, mist be cold, water cooling.
Strip goes out after annealing furnace cooling section, and wet type descaling mill is entered after squeeze roll squeezes out pan section water.There is water
The lower progress two curved one of spray is rectified, and is made the oxide layer on strip in flexure stress and is drawn to descend to crush and drop, shower water takes away iron powder
And carry out separation of solid and liquid recycling iron powder and shower water is recycled.
Strip goes out descaling mill to carry out entering shot-blasting machine behind drying surface into drying unit, it is pointed out that：Work as production
Finished product need the shot-blasting machine that comes into operation when being NO.1/2E, shot-blasting machine does not come into operation when the finished product of production is 2B/2D.
Strip, which goes out after shot-blasting machine, enters the remaining abrasive material (ball blast material) that precleaning unit removes surface, then passes sequentially through sulphur
Sour natrium electrolytic cell, the second brushing device, sulfuric acid washing groove, the 3rd brushing device, nitration mixture descaling bath, the 4th brushing device.Each groove
Corresponding circulating tank is provided with, wherein equipped with sodium sulphate regenerating unit, the crystal filtered out send sintering circuit to recycle.
Sulfuric acid circulating tank and nitration mixture circulating tank are furnished with on-line filtration device, you can circulation fluid is taken out from circulating tank and is filled into separation of solid and liquid
Put, filtrate stays back circulating tank, the filter cake filtered out is transported to sintering circuit and recycled.Waste mixed acid is sent after entering waste acid pot
Handled to waste mixed acid regenerative system, the rate of recovery 40%-50% of nitric acid, the rate of recovery of hydrofluoric acid is more than 98%, formation
Regenerated acid, which is sent to regenerated acid tank, to be added according to technological requirement and is used into nitration mixture circulating tank, the iron powder (metal such as chromium, nickel, iron of formation
Oxide) send sintering circuit to recycle.It is to be noted that：1) when the finished product of production is NO.1/2E, typically only come into operation sulphur
Pickling can increase the sodium sulphate electrolysis that comes into operation without the sodium sulphate electrolysis that comes into operation when raw material oxide skin is thicker；But production
When finished product is 2B/2D, for ensure surface grade can only come into operation sodium sulphate electrolysis, it is impossible to come into operation sulfuric acid washing.2) each nitration mixture groove
Equipped with two sets of circulatory systems (nitration mixture circulating tank, heat exchanger, pump etc.), a set of is that production 300 comes into operation when being, a set of for production 200
Come into operation when being, online concentration switching can be realized according to raw material material.3) nitration mixture descaling bath and the circulatory system matched therewith
Have multiple, come into operation quantity and concentration selection are selected with tape speed is crossed according to plate face situation.
Strip dries plate face by scrubbing and entering drying unit after final cleaning, then sequentially enters outlet looping, puts down
Complete machine, smooth small kink, monitor station, are finally rolled into coil of strip through devices for taking-up.It is to be noted that：1) planisher can be according to need
Two rollers or four-roller are used, when the finished product of production is NO.1/2E, is not come into operation typically；When the finished product of production is 2B/2D, then
Need to come into operation and reduction ratio is adjusted according to surface grade.2) when the finished product of production is 2B/2D, the devices for taking-up that need to come into operation is subsidiary
Packing paper function.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of can switch the production system of many grade stainless strips online, by the raw steel of many grade stainless strips
Involve in after the production system and then prepare different grades of stainless strip, the production system includes what is set gradually
Decoiling equipment, welder, entry loop, rolling machine system, milling train kink, annealing cooling system, mechanical descaling system, electrolysis acid
Wash system, outlet looping, planarization system and devices for taking-up, it is characterised in that the cathodic pickling system includes being sequentially connected setting
Precleaning unit, sodium sulphate electrolysis unit, sulfuric acid washing device and the nitration mixture acid dip pickle put.
2. the production system of many grade stainless strips can be switched online as claimed in claim 1, it is characterised in that described to roll
Machine system is made up of eighteen-high mill device, the first brushing device and the degreasing plant for possessing drying function successively；
Wherein, the eighteen-high mill device is arranged on the exit of the entry loop, and the degreasing plant is arranged on described
At the import of milling train kink；The eighteen-high mill device used as collateral support stressing device is the 18 of worm-gear endless-screw type
Roller tandem mill.
3. the production system of many grade stainless strips can be switched online as claimed in claim 1, it is characterised in that the machine
Tool descaling system includes being sequentially connected the descaling mill, drying unit and shot-blasting machine of setting；
Wherein, the descaling mill is arranged on the exit of the annealing cooling system, and the shot-blasting machine is arranged on the electrolysis acid
Wash at the import of system；The descaling mill is wet type descaling mill, and the lower descaling rolls of the wet type descaling mill are fixed and without tune
Mechanism is saved, working roll and support roller are processed using material GCr15, and hardening depth is up to 4~5mm.
4. the production system of many grade stainless strips can be switched online as claimed in claim 1, it is characterised in that described to open
Package is set to the big stroke harmomegathus uncoiler for possessing and reclaiming packing paper function；The welder is to possess swashing for laser cutting function
Welding machine；
Final cleaning and drying unit are additionally provided between the cathodic pickling system and the outlet looping；
The planarization system includes the planisher, smooth small kink, monitor station for being sequentially connected setting；
The devices for taking-up is the devices for taking-up for possessing cushioning paper function.
5. the production system of many grade stainless strips can be switched online as claimed in claim 1, it is characterised in that described
The exit of sodium sulphate electrolysis unit, the sulfuric acid washing device and the nitration mixture acid dip pickle is respectively arranged with the second scrub dress
Put, the 3rd brushing device and the 4th brushing device；
Wherein, the precleaning unit is arranged on the exit of the mechanical descaling system, and the 4th brushing device is arranged on
At the import of the outlet looping.
6. the production system of many grade stainless strips can be switched online as claimed in claim 5, it is characterised in that the sulphur
Sour sodium electrolysis unit is made up of the sulfuric acid natrium electrolytic cell, sodium sulphate circulating tank and sodium sulphate regenerating unit for being sequentially connected setting；
Wherein, second brushing device is arranged on the exit of the sulfuric acid natrium electrolytic cell；
Circular electrolyte regenerates through the sodium sulphate and filled from the sodium sulphate regenerating unit is entered in the sodium sulphate circulating tank
Put the regenerated liquid produced to be back in the sodium sulphate circulating tank, the crystal quilt produced through the sodium sulphate regenerating unit
It is transported to sintering circuit to be recycled, the electrolyte circulated between the sodium sulphate circulating tank and the sulfuric acid natrium electrolytic cell
It is the sodium sulphate circulated, is easy to the electrolytic cleaned to the stainless strip.
7. the production system of many grade stainless strips can be switched online as claimed in claim 5, it is characterised in that the sulphur
Sour acid dip pickle includes the sulfuric acid washing groove, sulfuric acid circulating tank and on-line filtration device for being sequentially connected setting；
Wherein, the 3rd brushing device is arranged on the exit of the sulfuric acid washing groove；
The on-line filtration device is equipment for separating liquid from solid；Sulfuric acid circulation fluid enters the solid-liquid point out of described sulfuric acid circulating tank
From in device, the filtrate isolated through the equipment for separating liquid from solid is back in the sulfuric acid circulating tank, through the separation of solid and liquid
The filter cake that device is isolated is transported to sintering circuit and recycled, the sulfuric acid circulating tank and the sulfuric acid washing groove it
Between circulation fluid be the sulfuric acid circulated, be easy to the Chemical cleaning to the stainless strip.
8. the production system of many grade stainless strips can be switched online as claimed in claim 5, it is characterised in that described mixed
Sour acid dip pickle includes the nitration mixture descaling bath, nitration mixture circulating tank and on-line filtration device for being sequentially connected setting；
Wherein, the 4th brushing device is arranged on the exit of the nitration mixture descaling bath；
The on-line filtration device is equipment for separating liquid from solid；Nitration mixture circulation fluid enters the solid-liquid point out of described nitration mixture circulating tank
From in device, the filtrate isolated through the equipment for separating liquid from solid is back in the nitration mixture circulating tank, through the separation of solid and liquid
The filter cake that device is isolated is transported to sintering circuit and recycled, the nitration mixture circulating tank and the nitration mixture descaling bath it
Between circulation fluid be the mixed acid circulated, be easy to the Chemical cleaning to the stainless strip.
9. the production system of many grade stainless strips can be switched online as claimed in claim 8, it is characterised in that also wrap
Include：Waste mixed acid tank, waste mixed acid regenerative system and regenerated acid tank；
Waste mixed acid regenerates system from the waste mixed acid tank is entered in the nitration mixture circulating tank, then through pipeline to the waste mixed acid
System, the regenerated acid produced through the waste mixed acid regenerative system is delivered in the regenerated acid tank to be needed to be added according to technique
Enter in the nitration mixture circulating tank, the iron powder produced through the waste mixed acid regenerative system, which is collected, to be transitted to sintering circuit and returned
Receipts processing.
10. can switch the production system of many grade stainless strips online as described in claim any one of 1-9, its feature exists
In many grade stainless strips are the stainless steel finished products that surface grade is NO.1,2B, 2D or 2E.
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| CN201710373505.6A CN107042239B (en) | 2017-05-24 | 2017-05-24 | Continuous rolling continuous annealing and washing production system capable of switching multi-grade stainless steel strips on line |
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|---|---|---|---|
| CN201710373505.6A CN107042239B (en) | 2017-05-24 | 2017-05-24 | Continuous rolling continuous annealing and washing production system capable of switching multi-grade stainless steel strips on line |
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| CN107962074A (en) * | 2017-12-04 | 2018-04-27 | 中冶南方工程技术有限公司 | A kind of stainless steel cold-rolled plate continuous process system and method |
| CN108085704A (en) * | 2017-11-01 | 2018-05-29 | 海盐哈特惠机械五金制品有限公司 | A kind of wire acid cleaning process |
| CN110678274A (en) * | 2017-05-17 | 2020-01-10 | 首要金属科技奥地利有限责任公司 | Guiding of metal strip in strip processing plant |
| CN111390570A (en) * | 2020-03-31 | 2020-07-10 | 日照宝华新材料有限公司 | Method for mutual conversion between acid pickling coil and hot rolling leveling on acid leveling line |
| CN112642877A (en) * | 2020-08-12 | 2021-04-13 | 杨勇 | One-step production process for stainless steel products from hot-rolled black skin to cold-rolled 2B or 2D plate surface |
| CN113201741A (en) * | 2021-05-06 | 2021-08-03 | 东风汽车车轮随州有限公司 | Bright aluminum alloy wheel acid pickling mixed flow production process |
| WO2024011965A1 (en) * | 2022-07-12 | 2024-01-18 | 中冶南方工程技术有限公司 | Multifunctional strip treatment system, and method for using same |
| WO2024011966A1 (en) * | 2022-07-12 | 2024-01-18 | 中冶南方工程技术有限公司 | Strip processing production line containing secondary rolling process, an strip processing method |
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| CN113201741A (en) * | 2021-05-06 | 2021-08-03 | 东风汽车车轮随州有限公司 | Bright aluminum alloy wheel acid pickling mixed flow production process |
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Address after: 536000 the Guangxi Zhuang Autonomous Region Beihai Tieshan Port Road No. four and No. seven interchange Patentee after: Guangxi Beigang New Material Co.,Ltd. Address before: 536000 intersection of No.4 road and No.7 Road, Tieshangang District, Guangxi Province, Beihai City, Guangxi Zhuang Autonomous Region Patentee before: Guangxi Beibu Gulf New Material Co.,Ltd. |
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