CN103643248B - Eliminate method and the device of strip pickling parking spot - Google Patents
Eliminate method and the device of strip pickling parking spot Download PDFInfo
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- CN103643248B CN103643248B CN201310597194.3A CN201310597194A CN103643248B CN 103643248 B CN103643248 B CN 103643248B CN 201310597194 A CN201310597194 A CN 201310597194A CN 103643248 B CN103643248 B CN 103643248B
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- band steel
- steel
- brush roll
- nozzle
- rinse bath
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Abstract
The invention discloses a kind of method and the device of eliminating strip pickling parking spot, its method comprises the following steps: 1), band steel arrives after rinse bath, rinses the upper surface of band steel and lower surface; 2), squeeze out with the raffinate of squeezing roller by band steel upper surface and lower surface; 3), produce shut down time, side spray shower nozzle facing to band steel spray sweeps; 4), when resuming production, upper lower nozzle sprays band steel upper and lower surface, and the brush roll at band steel exports place to Dai Gangbiao Qing Dynasty brush, and is sprayed by inclination shower nozzle; 5), be with steel to enter in air to carry out purging, air-dry; Its device is: in each cleaning section, install side-spraying device additional, and in the end a cleaning section installs brushing device additional.By side-spraying device to static belt steel surface continuous water spray, make the material of Surface Creation be difficult to deposition, and adopt the brush roll of cleaning back segment to be brushed off by this layer of material of belt steel surface, thus reach the object of completely clean belt steel surface, prevent the generation of parking spot.
Description
Technical field
The present invention relates to the belt steel surface parking spot removal technology in iron and steel cold rolling process, refer to a kind of method and the device of eliminating strip pickling parking spot particularly.
Technical background
There is one deck iron scale in coils of hot-rolled steel surface, needs this layer of iron scale to remove at cold rolling process.The method of normal employing pickling is removed.In continuous pickling process, due to a variety of causes, often need to shut down, be now with steel due at cleaning section overstand, be easy at belt steel surface deposition Fe (OH)
3deng material, after hyperthermia drying, this layer of material in surface is attached to belt steel surface, presents the surface imperfection of blackout or jaundice, has a strong impact on the surface quality of band steel.
In the patent documentation solving this kind of problem, publication number is the control method that the application for a patent for invention specification sheets of CN102677078A discloses a kind of shallow slot turbulence acid dip unit parking spot, it is by the rinse water of emptying cleaning section, and inject the corrosion inhibiting solution with corrosion inhibition subsequently, be allowed to condition at belt steel surface and form one deck corrosion inhibiting film, thus prevent from belt steel surface and water from reacting generating Fe (OH)
3deng material.In this approach, the time that emptying rinse water are longer with refilling corrosion inhibiting solution needs, the clean of belt steel surface is unfavorable for.And each needs additionally add inhibiter, add cost, and when frequent shutdown, effectively cannot utilize inhibiter.In addition, inhibiter also forms certain pollution to the cell body of rinse bath, is unfavorable for the clean of strip surface quality.
Except adding the method for inhibiter in cleaning section, other method often adopted is rewinding method, the place of namely terminating in the last operation of acid tank and rinse tank arranges brushing device, by the band steel reversed pickling tank that is in acid tank and rinse tank and rinse tank, and cleaning strip steel surface residual acid when band steel falls back.In this kind of method, Problems existing mainly contains 1) rewinding time there is corrosion to equipment before acid tank; 2) for the band steel that caproic acid is washed, during rewinding, steel band reenters acid tank, has increased the weight of the corrosion to base steel further, has a negative impact to the surface quality of product.
Summary of the invention
Object of the present invention is exactly the defect that will overcome the existence of above-mentioned prior art, a kind of method and the device of eliminating strip pickling parking spot are provided, the belt steel surface parking spot in iron and steel cold rolling process can be eliminated, improve the surface quality of band steel, its method easy handling, operating efficiency is high, and it is simple that device has structure, advantage easy to use.
For achieving the above object, the method for the elimination strip pickling parking spot designed by the present invention, comprises the following steps:
1), in production process, after arriving rinse bath, start the upper nozzle in rinse bath and lower nozzle, respectively the upper surface of band steel and lower surface are rinsed;
2) raffinate of steel upper surface and lower surface, is with to be squeezed out by the squeezing roller effect arranged in pairs up and down between two adjacent rinse baths;
3), produce shut down time, upper nozzle and lower nozzle are stopped using, and open the multiple side spray shower nozzles on rinse bath sidewall, and it is 0.5-50Bar that pressure is swept in the spray of side spray shower nozzle, by the impact of spraying pressure avoid belt steel surface deposit Fe (OH)
2, and make belt steel surface and air exclusion, reduce Surface Creation Fe (OH)
3;
4), when resuming production, side spray shower nozzle is stopped using, enable upper nozzle and lower nozzle to spray band steel upper and lower surface, and the brush roll simultaneously started in 1-2 the rinse bath being arranged on band steel exports place, and the inclination shower nozzle that brush roll is arranged towards band steel traffic direction side, by the spray effect of inclination shower nozzle, and after the material of belt steel surface brushes off by brush roll, a small amount of Fe of belt steel surface (OH)
3remove completely;
5), by brush roll brush and band steel after spraying enters in air and purges, then air-dry by hot blast, when resting on after the band steel in rinse bath passes through completely, brush roll of stopping using, returns to normal production.
Further, the side spray shower nozzle in described step uses de-salted water to purge band steel.
Again further, described desalination electrical conductivity of water is 5 ~ 50 μ s/cm, and the oxygen level of de-salted water is less than 5ppm, and the temperature of de-salted water is 5 ~ 30 DEG C, and de-salted water spraying pressure is 0.5 ~ 10Bar.
Again further, the side spray shower nozzle in described step uses protective gas N
2, CO
2, one in Ar purges band steel.
Again further, the pressure of described protective gas is 0.5 ~ 50Bar, and temperature is 5 ~ 30 DEG C, gas dew point≤0 DEG C.
The present invention also provides a kind of device of above-mentioned elimination strip pickling parking spot method, comprises multiple rinse bath, and is arranged on the multiple side spray shower nozzles on each rinse bath sidewall, and described multiple side spray shower nozzle lays respectively at the both sides of band steel and is be interspersed up and down; The upper nozzle being also included in above the band steel upper surface in each rinse bath and arrange respectively below lower surface and lower nozzle, and at least one pair of squeezing roller be arranged between every two adjacent rinse baths, described often pair of squeezing roller lay respectively at band steel above and below and be close to belt steel surface; And the brush roll be arranged in 1-2 the rinse bath at band steel exports place, described brush roll is arranged in pairs, and the often pair of brush roll lays respectively to be with above and below steel and to be close to belt steel surface; The brush roll of described paired setting is provided with inclination shower nozzle towards being with the side of steel traffic direction, and the nozzle of described inclination shower nozzle is towards belt steel surface.
Further, described brush roll is provided with 1-3 couple.
Again further, electronic or hydraulic drive mechanism is configured with.
The present invention is found by practical study, and the formation stages of belt steel surface parking spot is mainly in cleaning section, and the main chemical reactions of generation is as follows:
FeCl
2+H
2O=Fe(OH)
2+HCl
Fe(OH)
2+H
2O+1/2O
2=Fe(OH)
3
Fe(OH)
3=FeO(OH)+H
2O
Due to static band steel with the reactant aqueous solution of acidity, at surface deposition, one deck is containing Fe (OH)
2material, the Fe (OH) of generation
2further with the O in air
2reaction, generates Fe (OH)
3, Fe (OH)
3further generation hydrolysis reaction, final generates surface darkly or the material of Huang, after hot blast is air-dry, result in the generation of surperficial parking spot.
Principle is produced based on above-mentioned parking spot, the present invention upper nozzle and lower nozzle when normal production spray facing to the positive upper surface and lower surface being with steel, strong injection is rinsed belt steel surface, and the effect by squeezing roller between two rinse baths squeezes out raffinate, now side spray shower nozzle and brush roll are in stand-by state.When producing shutdown, adopt the mode of side spray facing to band steel spray, the impact of side spray makes belt steel surface be difficult to deposit Fe (OH)
2, and make belt steel surface and air exclusion, prevent Surface Creation Fe (OH)
3, current can be got rid of from the both sides of band steel simultaneously, are conducive to reducing the residual of belt steel surface.When resuming production, now stop side spray, again enable upper nozzle and lower nozzle to spray facing to the positive upper surface of band steel and lower surface, and enable the brush roll of production line in latter two rinse bath simultaneously and spray up and down, by brush roll and the effect that sprays up and down, the Fe making belt steel surface a small amount of (OH)
3remove completely, by the effect of brush roll, that can remove that belt steel surface do not remove further is residual, reaches better cleaning performance.Band steel after spray directly enters air purge and hot blast is air-dry.When resting on after the band steel in rinse bath passes through completely, brush roll of stopping using, enabling.
The present invention can eliminate common parking spot, improve the surface quality of band steel, have that cost is low, environmental protection, advantage that cleaning efficiency is high, be especially applicable to the production of continuous pickling unit.It is simple that apparatus of the present invention have structure, easy to use, operating efficiency advantages of higher.
Accompanying drawing explanation
Fig. 1 is a kind of apparatus structure schematic diagram eliminating strip pickling parking spot.
Fig. 2 is side spray schematic diagram of the present invention.
Fig. 3 is the schematic diagram of brush roll of the present invention and inclination shower nozzle.
In figure, rinse bath 1, side spray shower nozzle 2, upper nozzle 3, lower nozzle 4, squeezing roller 5, band steel 6, brush roll 7, inclination shower nozzle 8, acid tank 9, current 10.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Embodiment 1
Eliminate the method for strip pickling parking spot, comprise the following steps:
1), in production process, after band steel arrives rinse bath 1 from acid tank 9, start the upper nozzle 3 in rinse bath and lower nozzle 4, respectively the upper surface of band steel 6 and lower surface are rinsed;
2) raffinate of steel 6 upper surface and lower surface, is with to be squeezed out by the squeezing roller 5 arranged the in pairs up and down effect between two adjacent rinse baths 1;
3), produce when shutting down, upper nozzle 3 and lower nozzle 4 are stopped using, and open the multiple side spray shower nozzles 2 on rinse bath 1 sidewall, it is 0.5-50Bar that pressure is swept in the spray of side spray shower nozzle 2, avoid belt steel surface to deposit Fe (OH) by the impact of spraying pressure
2, and make belt steel surface and air exclusion, reduce Surface Creation Fe (OH)
3; Side spray shower nozzle 2 uses de-salted water to purge band steel 6, and desalination electrical conductivity of water is 5 ~ 50 μ s/cm, and the oxygen level of de-salted water is less than 5ppm, and the temperature of de-salted water is 5 ~ 30 DEG C, and current 10 spraying pressure that de-salted water produces is 0.5 ~ 10Bar;
4), when resuming production, side spray shower nozzle 2 is stopped using, enable upper nozzle 3 and lower nozzle 4 to spray band steel 6 upper and lower surface, and the brush roll 7 simultaneously started in 1-2 the rinse bath 1 being arranged on band steel 6 exit, and the inclination shower nozzle 8 that brush roll 7 is arranged towards band steel 6 traffic direction side, by the spray effect of inclination shower nozzle 8, and after the material of belt steel surface brushes off by brush roll 7, a small amount of Fe of belt steel surface (OH)
3remove completely;
5), by the band steel 6 after brush roll 7 and spray enter in air and purge, then air-dry by hot blast, when resting on after the band steel 6 in rinse bath 1 passes through completely, brush roll 7 of stopping using, returns to normal production.
Embodiment 2
Eliminate the method for strip pickling parking spot, comprise the following steps:
1), in production process, after band steel 6 arrives rinse bath 1 from acid tank 9, start the upper nozzle 3 in rinse bath and lower nozzle 4, respectively the upper surface of band steel 6 and lower surface are rinsed;
2) raffinate of steel 6 upper surface and lower surface, is with to be squeezed out by the squeezing roller 5 arranged the in pairs up and down effect between two adjacent rinse baths 1;
3), produce when shutting down, upper nozzle 3 and lower nozzle 4 are stopped using, and open the multiple side spray shower nozzles 2 on rinse bath 1 sidewall, it is 0.5-50Bar that pressure is swept in the spray of side spray shower nozzle 2, avoid belt steel surface to deposit Fe (OH) by the impact of spraying pressure
2, and make belt steel surface and air exclusion, reduce Surface Creation Fe (OH)
3; Side spray shower nozzle 2 uses protective gas N
2, CO
2, one in Ar purges band steel 6, the pressure of protective gas is 0.5 ~ 50Bar, and temperature is 5 ~ 30 DEG C, gas dew point≤0 DEG C;
4), when resuming production, side spray shower nozzle 2 is stopped using, enable upper nozzle 3 and lower nozzle 4 to spray band steel 6 upper and lower surface, and the brush roll 7 simultaneously started in 1-2 the rinse bath 1 being arranged on band steel 6 exit, and the inclination shower nozzle 8 that brush roll 7 is arranged towards band steel 6 traffic direction side, by the spray effect of inclination shower nozzle 8, and after the material of belt steel surface brushes off by brush roll 7, a small amount of Fe of belt steel surface (OH)
3remove completely;
5), by brush roll 7 brush and band steel 6 after spraying enters in air and purges, then air-dry by hot blast, when resting on after the band steel 6 in rinse bath 1 passes through completely, brush roll 7 of stopping using, returns to normal production.
Realize the device of above-mentioned elimination strip pickling parking spot method, comprise the multiple side spray shower nozzles 2 be arranged on each rinse bath 1 sidewall, multiple side spray shower nozzle 2 lays respectively at the both sides of band steel 6 and is be interspersed up and down; The upper nozzle 3 being also included in above band steel 6 upper surface in each rinse bath 1 and arrange respectively below lower surface and lower nozzle 4, and at least one pair of squeezing roller 5 be arranged between every two adjacent rinse baths 1, the often pair of squeezing roller 5 to lay respectively at above and below band steel 6 and is close to band steel 6 surface; And the brush roll 7 be arranged in 1-2 the rinse bath 1 in band steel 6 exit, brush roll 7 arranges in pairs and is provided with 2 right, and the often pair of brush roll 7 to lay respectively at above and below band steel 6 and is close to is with steel 6 surperficial; Brush roll 7 drives two brush rolls 7 to be provided with inclination shower nozzle 8 towards band steel 6 traffic direction side by electronic or hydraulic structure, and the nozzle of inclination shower nozzle 8 is towards band steel 6 surface.
For realizing the elimination strip pickling parking spot device that described method designs, comprising multiple rinse bath 1, and being arranged on the multiple side spray shower nozzles 2 on each rinse bath 1 sidewall, multiple side spray shower nozzle 2 lays respectively at the both sides of band steel 6 and is be interspersed up and down; The upper nozzle 3 being also included in above band steel 6 upper surface in each rinse bath 1 and arrange respectively below lower surface and lower nozzle 4, and at least one pair of squeezing roller 5 be arranged between every two adjacent rinse baths 1, the often pair of squeezing roller 5 to lay respectively at above and below band steel 6 and is close to band steel 6 surface; And the brush roll 7 be arranged in 1-2 the rinse bath 1 in band steel 6 exit, brush roll 7 is arranged in pairs, and the often pair of brush roll 7 lays respectively at above and below band steel 6 and to be close to band steel 6 surperficial; The brush roll 7 of paired setting is provided with inclination shower nozzle 8 towards being with the side of steel 6 traffic direction, and the nozzle of inclination shower nozzle 8 is towards band steel 6 surface.Brush roll 7 is provided with 1-3 couple.Brush roll 7 is configured with electronic or hydraulic drive mechanism.
This device installs side-spraying device additional in each cleaning section, and in the end a cleaning section installs brushing device additional, by side-spraying device to belt steel surface continuous water spray, the material of Surface Creation is made to be difficult to deposition, and adopt the brush roll of cleaning back segment to be brushed off by this layer of material of belt steel surface, thus reach the object of completely clean belt steel surface, prevent the generation of parking spot.The device of the application of the invention, can eliminate common parking spot, improves the surface quality of band steel, and it is simple that this device has structure, easy to use, operating efficiency advantages of higher.
Claims (6)
1. eliminate a method for strip pickling parking spot, it is characterized in that: the method comprises the following steps:
1) in production process, after band steel (6) arrives rinse bath (1), start the upper nozzle (3) in rinse bath (1) and lower nozzle (4), respectively the upper surface and lower surface of being with steel (6) are rinsed;
2) raffinate of steel (6) upper surface and lower surface is with to be squeezed out by the squeezing roller (5) arranged the in pairs up and down effect between two adjacent rinse baths (1);
3) when producing shutdown, upper nozzle (3) and lower nozzle (4) are stopped using, open the multiple side spray shower nozzles (2) on rinse bath (1) sidewall, side spray shower nozzle (2) uses de-salted water to purge band steel (6); It is 0.5-50Bar that pressure is swept in the spray of side spray shower nozzle (2), avoids belt steel surface to deposit Fe (OH) by the impact of spraying pressure
2, and make belt steel surface and air exclusion, reduce Surface Creation Fe (OH)
3; Desalination electrical conductivity of water is 5 ~ 50 μ s/cm, and the oxygen level of de-salted water is less than 5ppm, and the temperature of de-salted water is 5 ~ 30 DEG C, and de-salted water spraying pressure is 0.5 ~ 10Bar;
4) when resuming production, side spray shower nozzle (2) is stopped using, enable upper nozzle (3) and lower nozzle (4) to spray band steel (6) upper and lower surface, and the brush roll (7) simultaneously started in 1-2 the rinse bath (1) being arranged on band steel (6) exit, and the inclination shower nozzle (8) that brush roll (7) is arranged towards band steel (6) traffic direction side, by the spray effect of inclination shower nozzle (8), and after the material of belt steel surface brushes off by brush roll (7), a small amount of Fe of belt steel surface (OH)
3remove completely;
5) to be brushed by brush roll (7) and band steel (6) after spraying enters in air and purges, then air-dry by hot blast, when resting on after the band steel (6) in rinse bath (1) passes through completely, inactive brush roll (7), returns to normal production.
2. eliminate the method for strip pickling parking spot according to claim 1, it is characterized in that: described step 3) in, side spray shower nozzle (2) uses protective gas N
2, CO
2, one in Ar purges band steel (6).
3. eliminate the method for strip pickling parking spot according to claim 2, it is characterized in that: the pressure of described protective gas is 0.5 ~ 50Bar, and temperature is 5 ~ 30 DEG C, gas dew point≤0 DEG C.
4. one kind for realizing the elimination strip pickling parking spot device that method described in claim 1 designs, comprise multiple rinse bath (1), and the multiple side spray shower nozzles (2) be arranged on each rinse bath (1) sidewall, it is characterized in that: described multiple side spray shower nozzle (2) lays respectively at the both sides of band steel (6) and is be interspersed up and down; The upper nozzle (3) being also included in above band steel (6) upper surface in each rinse bath (1) and arrange respectively below lower surface and lower nozzle (4), and at least one pair of squeezing roller (5) be arranged between every two adjacent rinse baths (1), described often pair of squeezing roller (5) to lay respectively at above and below band steel (6) and is close to band steel (6) surface; And the brush roll (7) be arranged in 1-2 the rinse bath (1) in band steel (6) exit, described brush roll (7) is arranged in pairs, and the often pair of brush roll (7) to lay respectively at above and below band steel (6) and is close to band steel (6) surface; The brush roll (7) of described paired setting is provided with inclination shower nozzle (8) towards being with the side of steel (6) traffic direction, and the nozzle of described inclination shower nozzle (8) is towards band steel (6) surface.
5. elimination strip pickling parking spot device according to claim 4, is characterized in that: described brush roll (7) is provided with 1-3 couple.
6. the elimination strip pickling parking spot device according to claim 4 or 5, is characterized in that: described brush roll (7) is configured with electronic or hydraulic drive mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310597194.3A CN103643248B (en) | 2013-11-22 | 2013-11-22 | Eliminate method and the device of strip pickling parking spot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310597194.3A CN103643248B (en) | 2013-11-22 | 2013-11-22 | Eliminate method and the device of strip pickling parking spot |
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| Publication Number | Publication Date |
|---|---|
| CN103643248A CN103643248A (en) | 2014-03-19 |
| CN103643248B true CN103643248B (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310597194.3A Expired - Fee Related CN103643248B (en) | 2013-11-22 | 2013-11-22 | Eliminate method and the device of strip pickling parking spot |
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| CN (1) | CN103643248B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321928A (en) * | 2018-11-24 | 2019-02-12 | 崔国辉 | A kind of super austenitic stainless steel volume continuous acid-washing method |
| CN111893501A (en) * | 2020-09-08 | 2020-11-06 | 马钢(合肥)板材有限责任公司 | Device and method for eliminating pickling parking spots |
| CN112318379A (en) * | 2020-09-27 | 2021-02-05 | 山西太钢工程技术有限公司 | Surface treatment apparatus and surface treatment method for hot rolled plate |
| CN114737196A (en) * | 2021-01-07 | 2022-07-12 | 江苏创泰特钢制品有限公司 | Production method of softened steel strip |
| CN113351644A (en) * | 2021-05-31 | 2021-09-07 | 北京首钢股份有限公司 | Method for reducing occurrence rate of corrosion on surface of pickled plate |
| CN114134508A (en) * | 2021-11-23 | 2022-03-04 | 鞍钢联众(广州)不锈钢有限公司 | Method for improving corrosion defects of 400-series steel grades |
| CN115074741B (en) * | 2022-06-15 | 2023-05-26 | 本钢板材股份有限公司 | Pickling and rust removing process |
| CN115261877B (en) * | 2022-08-29 | 2023-12-08 | 粤海中粤(中山)马口铁工业有限公司 | Device and method for eliminating strip steel pickling stop spots by continuous pickling line |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1277528A2 (en) * | 2001-07-21 | 2003-01-22 | Sundwig-Kohler GmbH | Washing machine for metal strips |
| EP2581474A1 (en) * | 2011-10-14 | 2013-04-17 | Siemens VAI Metals Technologies GmbH | Method and device for treating a metal strip |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006045594A (en) * | 2004-08-02 | 2006-02-16 | Daido Plant Kogyo Kk | Steel strip washing device |
-
2013
- 2013-11-22 CN CN201310597194.3A patent/CN103643248B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1277528A2 (en) * | 2001-07-21 | 2003-01-22 | Sundwig-Kohler GmbH | Washing machine for metal strips |
| EP2581474A1 (en) * | 2011-10-14 | 2013-04-17 | Siemens VAI Metals Technologies GmbH | Method and device for treating a metal strip |
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| CN103643248A (en) | 2014-03-19 |
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Effective date of registration: 20170717 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 15 Wuchang, Wuhan Friendship Avenue, No. 999, block A, layer (Wuhan Iron and steel science and technology innovation department), No. 430080, Patentee before: Wuhan Iron & Steel (Group) Corp. |
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