CN103255429A - Pickling method of hot rolled steel strip - Google Patents
Pickling method of hot rolled steel strip Download PDFInfo
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- CN103255429A CN103255429A CN2013101151292A CN201310115129A CN103255429A CN 103255429 A CN103255429 A CN 103255429A CN 2013101151292 A CN2013101151292 A CN 2013101151292A CN 201310115129 A CN201310115129 A CN 201310115129A CN 103255429 A CN103255429 A CN 103255429A
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Abstract
The invention relates to a pickling method of a hot rolled steel strip. According to the method, a straightening process is added between an uncoiling process and a pickling process. Pickling tanks consists of four tandem and mutually independent acid tanks. A pickling section outlet is provided with four-stage countercurrent cascaded rinsing tanks for rinsing a pickled steel strip. The rinsed steel strip enters an edge blowing equipment equipped hot air drier, and a loop pit is arranged between the hot air drier and a three-roller tension device. The method provided in the invention can endow the pickled steel strip with a clean, bright, and blackspot-free surface, which is silvery white. The pickling time is shortened, and the heating time is short, so that the method is in favor of reducing energy consumption and improving the cleaning quality of the pickled steel strip.
Description
Technical field
The invention belongs to the metal material processing technical field, relate to a kind of acid washing method of hot rolled strip.
Background technology
The raw material of cold-rolled steel strip is hot rolled strip, and the steel strip surface of process hot rolling has the hard and crisp iron scale of one deck, and this one deck iron scale generates when high temperature rolling.In iron scale except the oxide compound of iron, also have elements such as P, Mn, Si, S, C, these oxide compounds are to cold rolling harmful, if directly being delivered to cold-rolling mill, these steel bands with iron scale are rolled, can cause following influence: under the situation of heavy reduction rolling, iron scale can be pressed into the matrix of steel band, influence surface quality and the processing characteristics of cold-rolled steel strip, even cause waste product.And enter the cold-rolling emulsion system after the iron scale fragmentation, pollute on the one hand emulsion, shorten the work-ing life of emulsion, damage the surface of roll on the other hand, the surface quality of cold-rolled steel strip is caused disadvantageous effect.
Countries in the world are removed the iron scale on hot rolled strip surface and have been taked several different methods, mainly comprise mechanical process, chemical method and electrochemical process.The most frequently used method is chemical method, namely adopts the iron phosphorus react with of strong acid such as sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid and steel material surface and removes iron scale, and nitric acid and hydrofluoric acid are mainly used in stainless pickling.Because characteristics such as hydrochloric acid has pickling speed fast (its pickling speed approximately is that the twice of sulfuric acid washing speed is many), non-corrosive steel ribbon matrix (rare hydrogen embrittlement phenomenon), can recycle fully are widely used in iron and steel enterprise's pickling lines.
At present, Chinese large-sized iron and steel enterprise has introduced external advanced person's continuous horizontal type pickling unit, and unit has the high characteristics of travelling speed, but has following problem: (1) facility investment is big; (2) energy consumption height; (3) maintenance cost height; The processing of need stopping when (4) width of steel band and thickness change influences production efficiency; Need often turn to when (5) wearing band, can cause trouble when steel band plate shape is bad.(6) need optional equipment for the steel band that can not weld with the welding property difference.
Summary of the invention
The objective of the invention is provides a kind of acid washing method of hot rolled strip for overcoming above-mentioned the deficiencies in the prior art, adopts this method can make pickling steel strip surface cleaning, light, no spot, and the surface is silvery white in color; Shorten the pickling time; Heat-up time is short, is conducive to cut down the consumption of energy, and improves pickling steel band cleaning quality.
For achieving the above object, the present invention adopts following technical proposals:
A kind of acid washing method of hot rolled strip, it adopts increases the aligning operation between uncoiling operation and pickling process, pickling tank is made up of four polyphones and separate acid tank, pickling section outlet arranges the steel band rinsing of four-stage counter-current tandem rinsing after to pickling, steel band after rinsing enters the hot air dryer oven dry that band blows the limit device, and the kink hole is set between hot-air drier and three roller tension devices; Concrete steps are as follows:
(1) uncoiling: by last volume dolly coils of hot-rolled steel is transferred to Abrollhaspel, the crawl Abrollhaspel is sent steel band into seven rollers and is pinched that straightener is aligned and broken phosphorus, enters pickling tank afterwards;
(2) wear band: start " self-threading tape " button, make the tape speed of wearing of taking the lead to set pass through four pickling tanks and level Four rinse bath successively automatically;
(3) pickling: hot rolled strip is successively by four pickling tank pickling, during works better, acid solution to pickling tank feed finite concentration and temperature, wherein, the concentration of No. 1 pickling tank acid solution is: (50～130) g/l, and temperature is (75～85) ℃, the temperature of No. 2 pickling tank acid solutions is: (70～80) ℃, the temperature of No. 3 pickling tank acid solutions is: (65～75) ℃, the concentration of No. 4 pickling tank acid solutions is: (160～230) g/l, and temperature is: (60～70) ℃; Each pickling tank is equipped with independent indirect heating system and acid circulation system, and acid solution and steel band are inverse motion, and acid solution constantly circulates by acid pump and makes it to remain in the design temperature scope through the heat exchanger of graphite heating;
(4) rinsing: the steel band after pickling enters rinse tank, rinse tank is level Four step type cell body, adopt the mode rinsing of adverse current hydro-peening, be provided with two groups of showers up and down in every grade of rinse tank, all be equipped with 7 nozzles on the every shower and be used for circulated sprinkling, and the accurate control by fourth stage rinse water specific conductivity, improve wash effect;
(5) oven dry: before hot-air drying device, be equipped with the compressed-air actuated limit device that blows of a pair of winding-up, with accumulating in the outer side-blown brush of the raffinate on steel band both sides to steel band, make steel band limit portion be easy to drying; Warm air drying equipment is arranged on the outlet side of rinse bath, is used for moisture continuous drying that the steel strip surface of coming out from rinse bath is adhered to;
(6) fill cover: in order to prevent shutting down generation parking spot because of the pickling section when producing, steel band kink hole is set between hot-air drying device and three roller tension devices is used for the storage steel band, the steel band after the drying enters the kink hole; In order to control the cover amount of filling of band steel in the kink hole, on the entrance and exit inwall in kink hole, 4 groups of phototubes are housed altogether;
(7) build and open: the steel band of cheating out from kink enters three roller tension devices (this device is existing equipment), and this device comprises frame, three tensioning rollers, transmission system, front and back pressure roller mechanism; When unit normally moved, the 2# tensioning roller of three roller tension devices descended, and cooperates 1#, the 3# tensioning roller of three roller tension devices to constitute one group of tension device, for reeling machine provides backward pull;
(8) batch: use the reeling machine rolling, be the automatic operation hydro-cylinder that floats of EPC device (limit portion aligning gear) of SPCC2.200.3 by model, make float frame the unit medullary ray ± scope of 50mm in to-and-fro movement, the fetch bit of adjustment steel coil strip is put, and it is batched neatly.
Described step (1) to four pickling tanks in the step (3) are contacted and separate mutually, and pickling tank is formed by 〉=10mm carbon steel weldering system, the acid-resisting rubber of the two-layer 3mm of liner, and the outer lining-up acid-proof ceramic tile of rubber, outermost is built grouan; For ease of wearing band, establish guiding grouan in the pickling tank; Acid discharge mist cover cap is arranged on the pickling tank, and with pickling tank cell body water-lute, acid discharge mist cover cap is provided with acid discharge nebelwind pipe;
The import and export of pickling tank are provided with squeezing roller, two pairs of squeezing rollers are established in the import of first pickling tank and the outlet of tetracid washing trough, establish a pair of squeezing roller between all the other per two pickling tanks, squeezing roller is Frequency Drive, is provided with retaining liquid box between squeezing roller two ends and the pickling tank cell body;
Described step (1) to each pickling tank in the step (3) all is equipped with the circulation loop that has heat exchanger.
When pickling tank unit during because of emergency shutdown, the pneumatic cut-off valve of pickling tank bottom is opened automatically in the described step (3), and acid solution drains in the circulation tank from sour pickling tank, and after accident treatment finished, acid solution was with being pumped into pickling tank; Described acid solution is sulfuric acid, hydrochloric acid, nitric acid or hydrofluoric acid.
Acid circulation system is provided with 4 sour circulation tanks in the described step (3), and each pickling tank uses a sour circulation tank separately; The cycling stream of acid solution is to opposite with the steel band traffic direction, and pickle solution flows to the 1# circulation tank successively from the 4# circulation tank, so the acid concentration in the 1# circulation tank is minimum, and the acid concentration in the 4# circulation tank is the highest; Be provided with the cascade piping system between each circulation loop, so that each circulation tank forms the cascading system; When acid strength is reduced to spent acid after testing in the 1# circulation tank, spent acid is drained into the acid regeneration station, the regenerating acid pump startup at acid regeneration station replenishes in the 4# circulation tank simultaneously.
Rinse tank in the described step (4) is formed by carbon steel weldering system, liner acid-resisting rubber and guiding stone material; Two pairs of squeezing rollers are established in the outlet of fourth stage rinse tank, establish a pair of squeezing roller, Frequency Drive between all the other every secondary grooves; Cover cap is arranged on the rinse tank, and with rinse tank cell body water-lute, cover cap is provided with the fog discharge airduct.
Recycle pump circulation feed flow is adopted in rinsing in the described step (4), and during works better, rinse water flow into first step rinse tank step by step by fourth stage rinse tank, to fourth stage rinse tank continuous supplementation water of condensation and de-salted water, keeps the rinsing water yield by constantly; The poaching wastewater Artesian Drainage is put into the poaching wastewater holding tank, delivers to waste water processing station or acid regeneration station through the poaching wastewater transferpump.
Be provided with thermometer and a steam heating jet pipe at fourth stage rinse tank, when temperature was below or above set(ting)value, the flow by the control of the variable valve on vapour pipe steam made water temperature remain on 85 ~ 90 ℃; Also be provided with the specific conductivity proofing unit at fourth stage rinse tank, detected value will show in the watch-keeping cubicle; And the detected value amount of automatically regulating the water of condensation that enters the last step rinse tank thus.
Each Rodless cylinder promoted about the position of blowing the limit nozzle in the described step (5) was passed through, and can regulate automatically with the difference of width of steel band.
The body of warm air drying equipment is welded construction in the described step (5), all seal and stud with in the drying shed of thermal insulation layer in the upper and lower part and all around, have the heating duct of nozzle, upper and lower paired layout, the hot blast of being sent here by the person in charge is sprayed onto on the steel band through this nozzle, makes its drying.
Two guide plates lifted and hold steel band when the steel band head in the described step (6) after the drying was cheated by 1# pinch roll and kink, and the curved side deflector roll makes the steel band alignment machine group switching centre line of kink outlet, enters the 2# pinch roll, and the kink guide plate is accommodated afterwards, and steel band fills cover; Fill when cover acid cleaning process section and shut down, outlet section equipment is with the operation of 60m/min speed, and with the steel band pull-up in the kink, when kink is cheated uppermost phototube when connecting, kink swing platform is laid out and held steel band and move forward; Two groups of kink guide plate stands are welded construction, and first group of guide plate stand is supported on the entrance bearing in kink hole; Second group of guide plate stand is supported on the outlet bearing in kink hole; And around back shaft rotation separately; The free roller of 3 non-transmissions respectively is housed, with the operation forward successfully of rest steel band on two groups of guide plates;
Three roller tension devices are cut edge for steel band and are batched the tension force that provides required in the described step (7); This device comprises frame, three tensioning rollers, transmission system, front and back pressure roller, frame is welded construction, 1#, 3# tensioning roller are stationary roll, be fixed on the suction side and the outlet side of frame separately by the bearing support at two ends, the 2# tensioning roller is the movable roll that can move in the vertical direction, it utilizes hydro-cylinder and by the guide pillar on the frame, does up-and-down movement in frame;
When unit was worn band, the 2# tensioning roller rose to the limes superiors position; Be provided with a guide plate in the bottom of roller, be used for wearing band; When the 2# tensioning roller drops to the working position, by the bearing support locking of locking cylinder with its two ends; Each tensioning roller all has independently transmission system; The pressure roller of a non-transmission respectively is housed above 1#, 3# tensioning roller, and pressure roller respectively has pair of hydraulic cylinders, swings up and down to compress steel band by lever arm.
Used device or equipment are prior art among the present invention.
The invention has the beneficial effects as follows: by hot rolled strip acid washing method of the present invention, reached following technical requirements: (1) pickling steel strip surface cleaning, light, no spot, the surface is silvery white in color; (2) steel band before entering pickling tank through the crooked broken phosphorus of seven roller straighteners it, shortened the pickling time; (3) because pickling tank is shallow, the about 0.5m(of groove depth is than the shallow at least 1m of classical acid washing trough), acid solution is few in the groove, and the acid solution amount only is 2.4m
3, weak point heat-up time that acid solution heats up used is conducive to cut down the consumption of energy.(4) temperature of each acid tank, concentration control can guarantee temperature, the concentration of each groove acid solution flexibly, and the pickling time is short.(5) adopt multi-stage spray during rinsing, improved pickling steel band cleaning quality.
Description of drawings
Fig. 1 is hot rolled strip acid washing method process flow sheet of the present invention.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1, the hot rolled strip method comprises the steps:
(1) uncoiling: coil of strip is transferred on the reel of uncoiler by last volume dolly, uncoiler lifts and extend out near coil of strip, associating crawl Abrollhaspel and pressure roller, depressing the recurvation roller makes hot rolled strip take the lead to enter seven rollers to pinch that straightener is aligned and broken phosphorus, associating crawl Abrollhaspel and seven rollers pinch straightener, before will taking the lead to be sent to the pickling tank entrance.
(2) wear band: start " self-threading tape " button, make the tape speed of wearing of taking the lead to set pass through 1# ~ 4# pickling tank and rinse bath successively automatically, phototube when band steel toe portion through the hot-air drier front, blow the limit device and reach the steel band limit, and will blow the limit and open with air cock, wear tape speed simultaneously and drop to set(ting)value.
(3) pickling: the steel band after aligning brokenly phosphorus enters pickling tank, and whole pickling tank is made up of four polyphones and separate acid tank.Pickling tank is formed by 〉=10mm carbon steel weldering system, the acid-resisting rubber of the two-layer 3mm of liner, and the outer lining-up acid-proof ceramic tile of rubber, outermost is built grouan.For ease of wearing band, establish guiding grouan in the groove.Acid discharge mist cover cap is arranged on the groove, and with the cell body water-lute, cover cap is provided with acid discharge nebelwind pipe.
The import and export of pickling tank are provided with squeezing roller, and two pairs of squeezing rollers are established in the outlet of the import of first groove and the 4th groove, establish a pair of squeezing roller between all the other two grooves.Squeezing roller is Frequency Drive.Be provided with retaining liquid box between squeezing roller two ends and the cell body.
Each pickling tank all is equipped with the circulation loop that has heat exchanger, its effect is: during works better to the acid solution of pickling tank feed finite concentration and temperature, acid solution constantly circulates by acid pump and heats through heat exchanger of graphite, vapour pipe intake valve aperture by on the automatic control heat exchanger makes it to remain in the design temperature scope.When pickling unit during because of emergency shutdown, the pneumatic cut-off valve of acid tank bottom is opened automatically, and acid solution drains in the circulation tank from acid tank, and after accident treatment finished, acid solution was with being pumped into pickling tank.
The acid solution recycle system is provided with 4 sour circulation tanks, and each pickling tank uses a sour circulation tank separately.The cycling stream of acid solution is to opposite with the steel band traffic direction, and pickle solution flows to the 1# circulation tank successively from the 4# circulation tank, so the acid concentration in the 1# circulation tank is minimum, and the acid concentration in the 4# circulation tank is the highest.Be provided with the cascade piping system between each circulation loop, so that each circulation tank forms the cascading system.When acid strength is reduced to spent acid after testing in the 1# circulation tank, spent acid is drained into the acid regeneration station, the regenerating acid pump startup at acid regeneration station replenishes in the 4# circulation tank simultaneously.
(4) rinsing: the steel band after pickling enters rinse tank, and rinse tank is level Four step type cell body, is formed liner acid-resisting rubber and guiding stone material by carbon steel weldering system.Every grade of groove is provided with water jet standpipe.Two pairs of squeezing rollers are established in the outlet of fourth stage groove, establish a pair of squeezing roller, Frequency Drive between all the other secondary grooves.Cover cap is arranged on the groove, and with the cell body water-lute, cover cap is provided with the fog discharge airduct.
The water spray tank adopts the mode of adverse current hydro-peening, recycle pump circulation feed flow.Rinse water flow into the first step step by step by the fourth stage rinse tank during works better, to fourth stage rinse tank continuous supplementation water of condensation and de-salted water, can keep the rinsing water yield by constantly.Be provided with two groups of showers up and down in every grade of rinse tank, be used for circulated sprinkling.Every shower all is equipped with 7 nozzles, so that jet flow can cover required hydro-peening width.The poaching wastewater Artesian Drainage is put into the poaching wastewater holding tank, delivers to waste water processing station or acid regeneration station through the poaching wastewater transferpump.
Be provided with thermometer and a steam heating jet pipe at fourth stage rinse tank, when temperature was below or above set(ting)value, the flow by the control of the variable valve on vapour pipe steam made water temperature remain on 85 ~ 90 ℃.Also be provided with the specific conductivity proofing unit at fourth stage rinse tank, detected value will show in the watch-keeping cubicle.And the detected value amount of automatically regulating the water of condensation that enters the last step rinse tank thus.
(5) oven dry: steel band was equipped with the compressed-air actuated limit device that blows of a pair of winding-up before entering hot-air drying device, with accumulating in the outer side-blown brush of the raffinate on band steel both sides to steel band, made steel band limit portion be easy to drying.Each Rodless cylinder promoted about the position of blowing the limit nozzle was passed through, and can regulate automatically with the difference of width of steel band.
The body of hot-air drier is welded construction.All seal and stud with in the drying shed of thermal insulation layer in the upper and lower part and all around, have the heating duct of nozzle, upper and lower paired layout.The hot blast of being sent here by the person in charge is sprayed onto on the steel band through this nozzle, makes its drying.Hot air source is made up of steam heat exchanger and blower fan, air filter, sound damper etc.
(6) fill cover: two guide plates lifted and hold steel band when the steel band head after the drying was cheated by 1# pinch roll and kink, and the curved side deflector roll makes the steel band alignment machine group switching centre line of kink outlet, enters the 2# pinch roll, and the kink guide plate is accommodated afterwards, and steel band fills cover.Fill when cover acid cleaning process section and shut down, outlet section equipment is with the operation of 60m/min speed, and with the steel band pull-up in the kink, when kink is cheated uppermost phototube when connecting, kink swing platform is laid out and held steel band and move forward.Two groups of kink guide plate stands are welded construction, and first group of guide plate stand is supported on the entrance bearing in kink hole; Second group of guide plate stand is supported on the outlet bearing in kink hole.Around back shaft rotation separately.The free roller of 3 non-transmissions respectively is housed, with the operation forward successfully of rest steel band on two groups of guide plates.
(7) build and open: the steel band of cheating out from kink enters three roller tension devices, and three roller tension devices are cut edge for steel band and batched the tension force that provides required.This device is made up of mechanisms such as frame, three tensioning rollers, transmission system, front and back pressure rollers.Frame is welded construction, 1#, 3# tensioning roller are stationary roll, are fixed on the suction side and the outlet side of frame separately by the bearing support at two ends, and the 2# tensioning roller is the movable roll that can move in the vertical direction, it utilizes hydro-cylinder and by the guide pillar on the frame, does up-and-down movement in frame.
When unit was worn band, the 2# tensioning roller rose to the limes superiors position; Be provided with a guide plate in the bottom of roller, be used for wearing band.When unit normally moved, the 2# tensioning roller descended, and cooperated 1#, 3# tensioning roller to constitute one group of tension device, for reeling machine provides backward pull.When the 2# tensioning roller drops to the working position, by the bearing support locking of locking cylinder with its two ends.Each tensioning roller all has independently transmission system.The pressure roller of a non-transmission respectively is housed above 1#, 3# tensioning roller, and pressure roller respectively has pair of hydraulic cylinders, swings up and down to compress steel band by lever arm.
(8) batch: use the reeling machine rolling, by the automatic operation hydro-cylinder that floats of EPC device, make float frame the unit medullary ray ± scope of 50mm in to-and-fro movement, adjustment strip coiling position, it is concordant that it is batched.Outlet coil of strip dolly unloads coil of strip delivers to semi-automatic bander, delivers to the outlet coil of strip behind the bundling and deposits saddle, is deposited to stockyard by the crane handling.
Claims (10)
1. the acid washing method of a hot rolled strip, it is characterized in that: it adopts increases the aligning operation between uncoiling operation and pickling process, pickling tank is made up of four polyphones and separate acid tank, pickling section outlet arranges the steel band rinsing of four-stage counter-current tandem rinsing after to pickling, steel band after rinsing enters the hot air dryer oven dry that band blows the limit device, and the kink hole is set between hot-air drier and three roller tension devices; Concrete steps are as follows:
(1) uncoiling: by last volume dolly coils of hot-rolled steel is transferred to Abrollhaspel, the crawl Abrollhaspel is sent steel band into seven rollers and is pinched that straightener is aligned and broken phosphorus, enters pickling tank afterwards;
(2) wear band: start " self-threading tape " button, make the tape speed of wearing of taking the lead to set pass through four pickling tanks and level Four rinse bath successively automatically;
(3) pickling: hot rolled strip is successively by four pickling tank pickling, during works better, acid solution to pickling tank feed finite concentration and temperature, wherein, the concentration of No. 1 pickling tank acid solution is (50～130) g/l, and temperature is (75～85) ℃, the temperature of No. 2 pickling tank acid solutions is (70～80) ℃, the temperature of No. 3 pickling tank acid solutions is (65～75) ℃, and the concentration of No. 4 pickling tank acid solutions is (160～230) g/l, and temperature is: (60～70) ℃; Each pickling tank is equipped with independent indirect heating system and acid circulation system, and acid solution and steel band are inverse motion, and acid solution constantly circulates by acid pump and makes it to remain in the design temperature scope through the heat exchanger of graphite heating;
(4) rinsing: the steel band after pickling enters rinse tank, rinse tank is level Four step type cell body, adopt the mode rinsing of adverse current hydro-peening, be provided with two groups of showers up and down in every grade of rinse tank, all be equipped with the nozzle of sufficient amount for circulated sprinkling on the every shower, and the accurate control by fourth stage rinse water specific conductivity, improve wash effect;
(5) oven dry: before hot-air drying device, be equipped with the compressed-air actuated limit device that blows of a pair of winding-up, with accumulating in the outer side-blown brush of the raffinate on steel band both sides to steel band, make steel band limit portion be easy to drying; Warm air drying equipment is arranged on the outlet side of rinse tank, is used for moisture continuous drying that the steel strip surface of coming out from rinse tank is adhered to;
(6) fill cover: in order to prevent shutting down generation parking spot because of the pickling section when producing, steel band kink hole is set between hot-air drying device and three roller tension devices is used for the storage steel band, the steel band after the drying enters the kink hole; In order to control the cover amount of filling of steel band in the kink hole, on the entrance and exit inwall in kink hole, 4 groups of phototubes are housed altogether;
(7) build and open: the steel band of cheating out from kink enters three roller tension devices, and when unit normally moved, the 2# tensioning roller of three roller tension devices descended, and cooperates 1#, the 3# tensioning roller of three roller tension devices to constitute one group of tension device, for reeling machine provides backward pull;
(8) batch: use the reeling machine rolling, by the automatic operation hydro-cylinder that floats of EPC device, make float frame the unit medullary ray ± scope of 50mm in to-and-fro movement, the fetch bit of adjustment steel coil strip is put, and it is batched neatly.
2. method according to claim 1, it is characterized in that: described step (1) to four pickling tanks in the step (3) are contacted and separate mutually, and pickling tank forms the acid-resisting rubber of the two-layer 3mm of liner by 〉=10mm carbon steel weldering system, the outer lining-up acid-proof ceramic tile of rubber, outermost is built grouan; For ease of wearing band, establish guiding grouan in the pickling tank; Acid discharge mist cover cap is arranged on the pickling tank, and with pickling tank cell body water-lute, acid discharge mist cover cap is provided with acid discharge nebelwind pipe; The import and export of pickling tank are provided with squeezing roller, two pairs of squeezing rollers are established in the import of first pickling tank and the outlet of tetracid washing trough, establish a pair of squeezing roller between all the other per two pickling tanks, squeezing roller is Frequency Drive, is provided with retaining liquid box between squeezing roller two ends and the pickling tank cell body.
3. method according to claim 1, it is characterized in that: described step (1) to each pickling tank in the step (3) all is equipped with the circulation loop that has heat exchanger.
4. method according to claim 1, it is characterized in that: when pickling tank unit during because of emergency shutdown, the pneumatic cut-off valve of pickling tank bottom is opened automatically in the described step (3), and acid solution drains in the circulation tank from pickling tank, after accident treatment finished, acid solution was with being pumped into pickling tank; Described acid solution is sulfuric acid, hydrochloric acid, nitric acid or hydrofluoric acid.
5. method according to claim 1 is characterized in that: acid circulation system is provided with 4 sour circulation tanks in the described step (3), and each pickling tank uses a sour circulation tank separately; The cycling stream of acid solution is to opposite with the steel band traffic direction, and pickle solution flows to the 1# circulation tank successively from the 4# circulation tank, so the acid concentration in the 1# circulation tank is minimum, and the acid concentration in the 4# circulation tank is the highest; Be provided with the cascade piping system between each circulation loop, so that each circulation tank forms the cascading system; When acid strength is reduced to spent acid after testing in the 1# circulation tank, spent acid is drained into the acid regeneration station, the regenerating acid pump startup at acid regeneration station replenishes in the 4# circulation tank simultaneously.
6. method according to claim 1 is characterized in that: the rinse tank in the described step (4) is formed by carbon steel weldering system, liner acid-resisting rubber and guiding stone material; Two pairs of squeezing rollers are established in the outlet of fourth stage rinse tank, establish a pair of squeezing roller, Frequency Drive between all the other every secondary grooves; Cover cap is arranged on the rinse tank, and with rinse tank cell body water-lute, cover cap is provided with the fog discharge airduct.
7. method according to claim 1, it is characterized in that: recycle pump circulation feed flow is adopted in rinsing in the described step (4), during works better, rinse water flow into first step rinse tank step by step by fourth stage rinse tank, to fourth stage rinse tank continuous supplementation water of condensation and de-salted water, keep the rinsing water yield by constantly; The poaching wastewater Artesian Drainage is put into the poaching wastewater holding tank, delivers to waste water processing station or acid regeneration station through the poaching wastewater transferpump; Be provided with thermometer and a steam heating jet pipe at fourth stage rinse tank, when temperature was below or above set(ting)value, the flow by the control of the variable valve on vapour pipe steam made water temperature remain on 85 ~ 90 ℃; Also be provided with the specific conductivity proofing unit at fourth stage rinse tank, detected value will show in the watch-keeping cubicle; And the detected value amount of automatically regulating the water of condensation that enters the last step rinse tank thus.
8. method according to claim 1 is characterized in that: each Rodless cylinder promoted about the position of blowing the limit nozzle in the described step (5) was passed through, and can regulate automatically with the difference of width of steel band;
The body of warm air drying equipment is welded construction, has the heating duct of nozzle in the upper and lower part reaches the drying shed that all seals and stud with thermal insulation layer all around, upper and lower paired layout, and the hot blast of being sent here by the person in charge is sprayed onto on the steel band through this nozzle, makes its drying.
9. method according to claim 1, it is characterized in that: two guide plates lifted and hold steel band when the steel band head in the described step (6) after the drying was cheated by 1# pinch roll and kink, the curved side deflector roll makes the steel band alignment machine group switching centre line of kink outlet, the kink guide plate is accommodated after entering the 2# pinch roll, and steel band fills cover; Fill when cover acid cleaning process section and shut down, outlet section equipment is with the operation of 60m/min speed, and with the steel band pull-up in the kink, when kink is cheated uppermost phototube when connecting, kink swing platform is laid out and held steel band and move forward; The guide plate stand of two groups of kinks is welded construction, and first group of guide plate stand is supported on the entrance bearing in kink hole; Second group of guide plate stand is supported on the outlet bearing in kink hole; And around back shaft rotation separately; The free roller of 3 non-transmissions respectively is housed, with the operation forward successfully of rest steel band on two groups of guide plates.
10. method according to claim 1 is characterized in that: three roller tension devices are cut edge for steel band and are batched the tension force that provides required in the described step (7); Three roller tension devices comprise frame, three tensioning rollers, transmission system, front and back pressure roller, frame is welded construction, the 1# of three roller tension devices, 3# tensioning roller are stationary roll, be fixed on the suction side and the outlet side of frame separately by the bearing support at two ends, the 2# tensioning roller of three roller tension devices is the movable roll that can move in the vertical direction, it utilizes hydro-cylinder and by the guide pillar on the frame, does up-and-down movement in frame; When unit was worn band, the 2# tensioning roller rose to the limes superiors position; Be provided with a guide plate in the bottom of roller, be used for wearing band; When the 2# tensioning roller drops to the working position, by the bearing support locking of locking cylinder with its two ends; Each tensioning roller all has independently transmission system; The pressure roller of a non-transmission respectively is housed above 1#, 3# tensioning roller, and pressure roller respectively has pair of hydraulic cylinders, swings up and down to compress steel band by lever arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101151292A CN103255429A (en) | 2013-04-06 | 2013-04-06 | Pickling method of hot rolled steel strip |
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|---|---|---|---|---|
| CN103882456A (en) * | 2014-03-18 | 2014-06-25 | 中冶南方工程技术有限公司 | Annealing-pickling method for hot-rolled 436 L ultra-pure ferrite stainless strip steel |
| CN103978045A (en) * | 2014-05-22 | 2014-08-13 | 邯钢集团邯宝钢铁有限公司 | Acid washing cold rolling combined unit inlet loop filling speed control method |
| CN104209350A (en) * | 2014-09-18 | 2014-12-17 | 攀钢集团攀枝花钢钒有限公司 | Band steel traction connection structure and band penetration method for continuous band steel unit |
| CN104894587A (en) * | 2015-06-03 | 2015-09-09 | 江苏兴隆防腐设备有限公司 | Strip steel pickling circulating system |
| CN105350009A (en) * | 2015-11-30 | 2016-02-24 | 内蒙古包钢钢联股份有限公司 | Pickling equipment for steel reel |
| CN105506658A (en) * | 2016-03-08 | 2016-04-20 | 佳马机械涂覆科技（苏州）有限公司 | Acidic derusting device |
| CN106540993A (en) * | 2016-12-01 | 2017-03-29 | 浙江东南金属薄板有限公司 | Hot rolling acid-cleaning plate |
| CN107190267A (en) * | 2017-06-13 | 2017-09-22 | 浙江协和陶瓷有限公司 | A kind of manufacturing process of pickling coil of strip |
| CN107268012A (en) * | 2017-06-13 | 2017-10-20 | 浙江协和陶瓷有限公司 | Manufacturing process is rolled up in pickling |
| CN107931330A (en) * | 2017-10-24 | 2018-04-20 | 首钢京唐钢铁联合有限责任公司 | A kind of automatic backing method of cold rolled sheet |
| CN108660467A (en) * | 2017-03-28 | 2018-10-16 | 宝山钢铁股份有限公司 | A kind of threading method of pickling unit |
| CN109536980A (en) * | 2019-01-23 | 2019-03-29 | 陈欣洁 | A kind of strip pickling recycle unit |
| CN110180906A (en) * | 2019-05-20 | 2019-08-30 | 中冶南方工程技术有限公司 | The efficient descaling device of strip and method |
| CN110408941A (en) * | 2019-07-23 | 2019-11-05 | 北京首钢股份有限公司 | A kind of acid washing method of Multiphase Steel |
| CN110903105A (en) * | 2019-12-12 | 2020-03-24 | 贵州晨春石业有限公司 | Marble pickling device |
| CN111020606A (en) * | 2019-11-08 | 2020-04-17 | 上海巨航实业发展有限公司 | Pickling process and waste acid manufacturing process for hot-rolled carbon steel coil |
| CN111188044A (en) * | 2020-02-17 | 2020-05-22 | 本钢板材股份有限公司 | Method for prolonging service life of graphite heat exchanger of cold rolling pickling line |
| 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 |
| CN113737196A (en) * | 2021-09-09 | 2021-12-03 | 本钢板材股份有限公司 | Energy-saving strip steel pickling mechanism |
| CN114455579A (en) * | 2022-03-04 | 2022-05-10 | 杨德俊 | Method for purifying natural graphite |
| CN114622216A (en) * | 2022-03-30 | 2022-06-14 | 新余钢铁股份有限公司 | Method for preventing pickling line from generating pickling stop spots on surface of strip steel |
| CN114807954A (en) * | 2022-04-29 | 2022-07-29 | 常熟科弘材料科技有限公司 | Strip steel pickling method with antirust effect and strip steel pickling line thereof |
| CN115198283A (en) * | 2021-04-12 | 2022-10-18 | 本钢板材股份有限公司 | Injection type pickling device |
| CN117600630A (en) * | 2024-01-17 | 2024-02-27 | 锐宝(常州)焊割科技有限公司 | Welding head and welding device for aluminum alloy plasma arc welding |
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| CN101871105A (en) * | 2010-06-24 | 2010-10-27 | 永鑫精密材料（无锡）有限公司 | Production technique of high-accuracy cold-rolling carbon-steel steel belt for electronic industry |
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Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103882456B (en) * | 2014-03-18 | 2016-03-30 | 中冶南方工程技术有限公司 | Hot rolling 436L super-purity ferrite stainless steel band steel annealing and pickling method |
| CN103882456A (en) * | 2014-03-18 | 2014-06-25 | 中冶南方工程技术有限公司 | Annealing-pickling method for hot-rolled 436 L ultra-pure ferrite stainless strip steel |
| CN103978045A (en) * | 2014-05-22 | 2014-08-13 | 邯钢集团邯宝钢铁有限公司 | Acid washing cold rolling combined unit inlet loop filling speed control method |
| CN104209350A (en) * | 2014-09-18 | 2014-12-17 | 攀钢集团攀枝花钢钒有限公司 | Band steel traction connection structure and band penetration method for continuous band steel unit |
| CN104894587A (en) * | 2015-06-03 | 2015-09-09 | 江苏兴隆防腐设备有限公司 | Strip steel pickling circulating system |
| CN105350009B (en) * | 2015-11-30 | 2019-02-15 | 内蒙古包钢钢联股份有限公司 | Coil of strip pickler |
| CN105350009A (en) * | 2015-11-30 | 2016-02-24 | 内蒙古包钢钢联股份有限公司 | Pickling equipment for steel reel |
| CN105506658A (en) * | 2016-03-08 | 2016-04-20 | 佳马机械涂覆科技（苏州）有限公司 | Acidic derusting device |
| CN106540993B (en) * | 2016-12-01 | 2018-11-13 | 浙江东南新材科技有限公司 | Hot rolling acid-cleaning plate |
| CN106540993A (en) * | 2016-12-01 | 2017-03-29 | 浙江东南金属薄板有限公司 | Hot rolling acid-cleaning plate |
| CN108660467A (en) * | 2017-03-28 | 2018-10-16 | 宝山钢铁股份有限公司 | A kind of threading method of pickling unit |
| CN107268012A (en) * | 2017-06-13 | 2017-10-20 | 浙江协和陶瓷有限公司 | Manufacturing process is rolled up in pickling |
| CN107190267A (en) * | 2017-06-13 | 2017-09-22 | 浙江协和陶瓷有限公司 | A kind of manufacturing process of pickling coil of strip |
| CN107190267B (en) * | 2017-06-13 | 2019-06-14 | 浙江协和首信钢业有限公司 | A kind of manufacturing process of pickling coil of strip |
| CN107931330A (en) * | 2017-10-24 | 2018-04-20 | 首钢京唐钢铁联合有限责任公司 | A kind of automatic backing method of cold rolled sheet |
| CN107931330B (en) * | 2017-10-24 | 2019-11-29 | 首钢京唐钢铁联合有限责任公司 | A kind of automatic backing method of cold rolled sheet |
| CN109536980A (en) * | 2019-01-23 | 2019-03-29 | 陈欣洁 | A kind of strip pickling recycle unit |
| CN110180906A (en) * | 2019-05-20 | 2019-08-30 | 中冶南方工程技术有限公司 | The efficient descaling device of strip and method |
| WO2020232936A1 (en) * | 2019-05-20 | 2020-11-26 | 中冶南方工程技术有限公司 | High-efficiency strip steel descaling device and method |
| CN110408941A (en) * | 2019-07-23 | 2019-11-05 | 北京首钢股份有限公司 | A kind of acid washing method of Multiphase Steel |
| CN110408941B (en) * | 2019-07-23 | 2021-12-03 | 北京首钢股份有限公司 | Pickling method of complex phase steel |
| CN111020606A (en) * | 2019-11-08 | 2020-04-17 | 上海巨航实业发展有限公司 | Pickling process and waste acid manufacturing process for hot-rolled carbon steel coil |
| CN110903105A (en) * | 2019-12-12 | 2020-03-24 | 贵州晨春石业有限公司 | Marble pickling device |
| CN111188044A (en) * | 2020-02-17 | 2020-05-22 | 本钢板材股份有限公司 | Method for prolonging service life of graphite heat exchanger of cold rolling pickling line |
| 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 |
| CN111390570B (en) * | 2020-03-31 | 2021-07-06 | 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 |
| CN115198283A (en) * | 2021-04-12 | 2022-10-18 | 本钢板材股份有限公司 | Injection type pickling device |
| CN113737196A (en) * | 2021-09-09 | 2021-12-03 | 本钢板材股份有限公司 | Energy-saving strip steel pickling mechanism |
| CN113737196B (en) * | 2021-09-09 | 2023-05-26 | 本钢板材股份有限公司 | Energy-saving strip steel pickling mechanism |
| CN114455579A (en) * | 2022-03-04 | 2022-05-10 | 杨德俊 | Method for purifying natural graphite |
| CN114622216A (en) * | 2022-03-30 | 2022-06-14 | 新余钢铁股份有限公司 | Method for preventing pickling line from generating pickling stop spots on surface of strip steel |
| CN114807954A (en) * | 2022-04-29 | 2022-07-29 | 常熟科弘材料科技有限公司 | Strip steel pickling method with antirust effect and strip steel pickling line thereof |
| CN114807954B (en) * | 2022-04-29 | 2023-11-21 | 常熟科弘材料科技有限公司 | Strip steel pickling method with rust-proof effect and strip steel pickling line thereof |
| CN117600630A (en) * | 2024-01-17 | 2024-02-27 | 锐宝(常州)焊割科技有限公司 | Welding head and welding device for aluminum alloy plasma arc welding |
| CN117600630B (en) * | 2024-01-17 | 2024-04-05 | 锐宝(常州)焊割科技有限公司 | Welding head and welding device for aluminum alloy plasma arc welding |
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