CN102766899B - Closed electrolytic pickling machine set - Google Patents
Closed electrolytic pickling machine set Download PDFInfo
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- CN102766899B CN102766899B CN201210292259.9A CN201210292259A CN102766899B CN 102766899 B CN102766899 B CN 102766899B CN 201210292259 A CN201210292259 A CN 201210292259A CN 102766899 B CN102766899 B CN 102766899B
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Abstract
The invention relates to a closed electrolytic pickling machine set which comprises an inlet wire water curtain groove, at least one electrolytic pickling grooves and an outlet wire water curtain groove which are arranged in sequence along the wiring direction of a steel wire. The closed electrolytic pickling machine set is characterized in that two ends of cover plates of the electrolytic pickling grooves are provided with inlet wire sealing devices and outlet wire sealing devices respectively, the inlet wire sealing devices and the outlet wire sealing devices can be penetrated by the steel wire, and can prevent pickling solutions in the electrolytic pickling grooves from escaping from two ends; positive work grooves and negative work grooves are arranged in the electrolytic pickling grooves, the steel wire penetrates above the positive work grooves and the negative work grooves, positive plates are mounted in positive work grooves, and negative plates are mounted in the negative work grooves; and the positive work grooves and the negative work grooves are connected with a liquid outlet of an acid pump box through an acid inlet pipe respectively, and a liquid inlet of the acid pump box is communicated with the interiors of the electrolytic pickling grooves through an acid pimping pipe. The closed electrolytic pickling machine set has the advantages of being ingenious and reasonable in structure, good in sealing performance, free of pickling solution leakage, and environment friendly.
Description
Technical field
The invention belongs to Steel Wire Heat Treatment-surface processing equipment technical field, specifically relate to a kind of closed electrolytic pickling unit.
Background technology
In prior art, in order to improve the over-all properties of steel wire, conventionally need to heat-treat and surface treatment steel wire.In general, in the time producing, steel wire will be through operations such as Overheating Treatment, pickling, phosphatization, hot water wash, boronation, saponification, oven dry, and each link has larger impact to the drawing property of steel wire.
In steel wire drawing production process, the quality of Steel Wire Surface phosphatize phosphate coat is very important, and it directly affects the mould consumption in surface quality, mechanical performance index and the production process after steel wire drawing.The oilness phosphatize phosphate coat that utilizes phosphatization to generate, can play and reduce friction the drawing of steel wire, avoids producing and pulls or the effect of crackle, and can extend the work-ing life of wire-drawing die.
It should be clean metallic surface that bonderizing requires Steel Wire Surface.Before phosphatization, must remove the pre-treatment such as grease, corrosion thing, oxide skin and surface adjustment through heat treated steel wire, make metallic surface possess certain " activity ", could obtain even, careful, closely knit phosphatize phosphate coat, ensure finished surface quality.Current acid pickling and rust removing, the method descaling are the methods that industrial circle is most widely used.The object of utilizing acid that the mechanically peel effect of oxide dissolution and corrosion generation hydrogen is reached rust cleaning and descaled.Sulfuric acid is a kind of conventional pickle solution, and existing employing sulfuric acid has part defect as the pickling unit structure design of pickle solution, and sealing effect is bad, the pickle solution effusion of easily volatilizing, and contaminate environment, etching apparatus, affects staff healthy.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of closed electrolytic pickling unit is provided, its structure is ingenious, reasonable, closure energy consumption, and pickle solution can not be revealed, more environmental protection.
According to technical scheme provided by the invention: closed electrolytic pickling unit, comprise the inlet wire cascade groove, at least one electrolytic pickling groove and the outlet cascade groove that arrange in turn along steel wire direction of routing, between described inlet wire cascade groove and electrolytic pickling groove, between adjacent electrolytic pickling groove, be all connected by cell body web plate between electrolytic pickling groove and outlet cascade groove; Described inlet wire cascade front of the slot is provided with inlet wire separated time grinding stone, steel wire enters inlet wire cascade groove after inlet wire separated time grinding stone separated time, in described electrolytic pickling groove, be loaded with pickle solution, steel wire enters in electrolytic pickling groove out from inlet wire cascade groove, is fitted with the electrolytic pickling groove cover plate that prevents that pickle solution volatilization from overflowing on electrolytic pickling groove; Described outlet cascade groove rear end is provided with outlet separated time grinding stone, and steel wire enters outlet cascade groove from electrolytic pickling groove out, then after outlet separated time grinding stone separated time, leaves pickling unit; It is characterized in that: described electrolytic pickling groove cover plate two ends are respectively arranged with incoming seal device and outlet sealing device, described incoming seal device is arranged on inlet wire cascade groove, described outlet sealing device is arranged on outlet cascade groove, incoming seal device, outlet sealing device can pass for steel wire, and can prevent that the pickle solution in electrolytic pickling groove from volatilizing and overflowing from two ends; In described electrolytic pickling groove, be provided with anodal work nest and negative pole work nest, described steel wire passes from anodal work nest and negative pole work nest top, in anodal work nest, positive plate is installed, and in negative pole work nest, negative plate is installed; Described anodal work nest, negative pole work nest are connected with the liquid outlet of sour pump box by acid inlet tube respectively, the fluid inlet of described sour pump box is by acid extracting pipe and electrolytic pickling groove internal communication, and sour pump box is extracted the pickle solution in electrolytic pickling groove be delivered to out in anodal work nest, negative pole work nest.
As a further improvement on the present invention, described incoming seal device is water curtain type tightness system, it comprises waterproof pump box, cascade groove pallet and cascade lid, described cascade groove pallet is arranged in inlet wire cascade groove, cascade lid is arranged on directly over cascade groove pallet, and described steel wire passes between cascade groove pallet and cascade lid; Described waterproof pump box is arranged on inlet wire cascade groove side, the water-in of waterproof pump box is by drinking-water pipe and inlet wire cascade groove internal communication, the water outlet of waterproof pump box is by water inlet pipe and cascade lid internal communication, waterproof pump box is extracted the water in inlet wire cascade groove be delivered to out in cascade lid, then water from the free-falling of cascade lid to cascade groove pallet; Described outlet sealing device is identical with incoming seal apparatus structure.
As a further improvement on the present invention, described inlet wire cascade groove, electrolytic pickling groove and outlet cascade groove both sides are provided with for steel wire and wear the side seal of silk operation and wear a passage, side seal and wear in a passage water is housed, the dual-side of described electrolytic pickling groove cover plate is provided with cover plate water seal plate, the corresponding inserting side water seal of described cover plate water seal plate and wear in a passage and be immersed in the water.
As a further improvement on the present invention, on described electrolytic pickling groove cover plate, have along the hole slot of electrolytic pickling groove cover plate width, in described hole slot, correspondence is equipped with line ball lid, and described line ball lid lower end is provided with line ball grinding stone, line ball grinding stone is pushed down steel wire, prevents that steel wire from beating; The dual-side of described line ball lid is provided with water seal plate, and described hole slot both sides correspondence is provided with water sealed tank, and water is housed in water sealed tank, and described water seal plate is corresponding to be inserted in water sealed tank and is immersed in the water.
As a further improvement on the present invention, the negative pole work nest in described each electrolytic pickling groove is at least one, and each negative pole work nest is furnished with two anodal work nests, and two anodal work nests lay respectively at negative pole work nest both sides.The rear and front end of described cascade groove pallet is provided with the first holder line grinding stone.The rear and front end of described anodal work nest, negative pole work nest is provided with the second holder line grinding stone.
As a further improvement on the present invention, in described inlet wire cascade groove, electrolytic pickling groove and outlet cascade groove, be provided with holder line grinding stone.On cell body web plate on cell body web plate between described inlet wire cascade groove and electrolytic pickling groove and between electrolytic pickling groove and outlet cascade groove, be provided with junction holder line grinding stone.On described electrolytic pickling groove, be provided with the liquidometer that is used to indicate pickling liquid measure.
Compared with prior art, advantage is in the present invention: structure of the present invention is ingenious, reasonable, closure energy consumption, and pickle solution can not be revealed, more environmental protection; Can make steel wire stabilized walking in pickle solution, jumping phenomena can not occur, cleaning performance is good, is conducive to improve the quality of products simultaneously; The water of front cascade is difficult for being brought in acid tank by steel wire, and the acid in acid tank is difficult for being brought in rear cascade by steel wire, is conducive to reduce acid consumption, reduces the spent acid water yield and environmental pollution simultaneously.
Brief description of the drawings
Fig. 1 is the structural front view of the embodiment of the present invention.
Fig. 2 is that Fig. 1 removes the structure vertical view after cascade lid and electrolytic pickling groove cover plate.
Fig. 3 is that A-A in Fig. 1 is to sectional view.
Fig. 4 is that B-B in Fig. 1 is to sectional view.
Fig. 5 is that C-C in Fig. 1 is to sectional view.
Fig. 6 is the D portion enlarged diagram in Fig. 4.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in the figure: the closed electrolytic pickling unit in embodiment is mainly by inlet wire cascade groove 1, electrolytic pickling groove 2, outlet cascade groove 3, junction holder line grinding stone 4, cell body web plate 5, through inlet wire separated time grinding stone 6, electrolytic pickling groove cover plate 7, acid pump box 8, waterproof pump box 9, positive plate 11, negative plate 12, line ball lid 13, holder line grinding stone 14, cascade lid 15, cascade groove pallet 16, outlet separated time grinding stone 17, anodal work nest 18, negative pole work nest 19, the first holder line grinding stone 20, the second holder line grinding stone 21, upflow tube 22, water shoot 23, drinking-water pipe 24, water inlet pipe 25, add water pipe 26, acid extracting pipe 27, liquidometer 28, ACID 29, add the component such as acid tube 30 and acid inlet tube 31 composition.
As shown in Fig. 1 ~ Fig. 5, described inlet wire cascade groove 1, at least one electrolytic pickling groove 2 and outlet cascade groove 3 arrange in turn along steel wire 10 direction of routing, between described inlet wire cascade groove 1 and electrolytic pickling groove 2, between adjacent electrolytic pickling groove 2, be all connected by cell body web plate 5 between electrolytic pickling groove 2 and outlet cascade groove 3; Described inlet wire cascade groove 1 front end is provided with inlet wire separated time grinding stone 6, steel wire 10 enters inlet wire cascade groove 1 after inlet wire separated time grinding stone 6 separated times, in described electrolytic pickling groove 2, be loaded with pickle solution, steel wire 10 enters in electrolytic pickling groove 2 out from inlet wire cascade groove 1, is fitted with the electrolytic pickling groove cover plate 7 that prevents that pickle solution volatilization from overflowing on electrolytic pickling groove 2; Described outlet cascade groove 3 rear ends are provided with outlet separated time grinding stone 17, and steel wire 10 enters outlet cascade groove 3 from electrolytic pickling groove 2 out, then after outlet separated time grinding stone 17 separated times, leaves pickling unit; Described electrolytic pickling groove cover plate 7 two ends are respectively arranged with incoming seal device and outlet sealing device, described incoming seal device is arranged on inlet wire cascade groove 1, described outlet sealing device is arranged on outlet cascade groove 3, incoming seal device, outlet sealing device can pass for steel wire 10, and can prevent that the pickle solution in electrolytic pickling groove 2 from volatilizing and overflowing from two ends; In described electrolytic pickling groove 2, be provided with anodal work nest 18 and negative pole work nest 19, described steel wire 10 passes from anodal work nest 18 and negative pole work nest 19 tops, in anodal work nest 18, positive plate 11 is installed, and negative plate 12 is installed in negative pole work nest 19; Described anodal work nest 18, negative pole work nest 19 are connected with the liquid outlet of sour pump box 8 by acid inlet tube 31 respectively, the fluid inlet of described sour pump box 8 is by acid extracting pipe 27 and electrolytic pickling groove 2 internal communication, and sour pump box 8 is extracted the pickle solution in electrolytic pickling groove 2 be delivered to out in anodal work nest 18, negative pole work nest 19.Described electrolytic pickling groove 2 is provided with and adds acid mouth and acid discharge mouth, adds an acid mouthful connection and adds acid tube 30, and acid discharge mouth connects ACID 29.
As shown in Figure 1 and Figure 2, in the embodiment of the present invention, the negative pole work nest 19 in described each electrolytic pickling groove 2 has one, and each negative pole work nest 19 is furnished with 18, two anodal work nests 18 of two anodal work nests and lays respectively at negative pole work nest 19 both sides.
As shown in Figure 1, Figure 3, described incoming seal device is water curtain type tightness system, it is mainly made up of waterproof pump box 9, cascade groove pallet 16 and cascade lid 15, described cascade groove pallet 16 is arranged in inlet wire cascade groove 1, cascade lid 15 is arranged on directly over cascade groove pallet 16, and described steel wire 10 passes between cascade groove pallet 16 and cascade lid 15; Described waterproof pump box 9 is arranged on inlet wire cascade groove 1 side, the water-in of waterproof pump box 9 is by drinking-water pipe 24 and inlet wire cascade groove 1 internal communication, the water outlet of waterproof pump box 9 is by water inlet pipe 25 and cascade lid 15 internal communication, waterproof pump box 9 is extracted the water in inlet wire cascade groove 1 be delivered to out in cascade lid 15, then water from 15 free-fallings of cascade lid to cascade groove pallet 16.The baffle plate of the staggered arrangement being provided with in described cascade lid 15, baffle plate is used for making water steadying trickling, forms stable cascade, effectively prevents that the pickle solution volatilization in electrolytic pickling groove 2 from overflowing.
As shown in Figure 1, in actual production, the water in inlet wire cascade groove 1 can consume minimizing, and therefore, the top of described inlet wire cascade groove 1 is provided with adds the mouth of a river, adds mouth of a river connection and adds water pipe 26.In order to prevent the water overfill in inlet wire cascade groove 1, on inlet wire cascade groove 1, be also provided with spillway, spillway connects upflow tube 22.In actual production, the water in inlet wire cascade groove 1 sometimes needs to drain, and therefore, described inlet wire cascade groove 1 inner bottom part is provided with water port, and water port connects water shoot 23.
The structure of described outlet cascade groove 3 and outlet sealing device is identical with the structure of inlet wire cascade groove 1 and incoming seal device, so locate to repeat no more.
As shown in Fig. 1 ~ Fig. 6, described inlet wire cascade groove 1, electrolytic pickling groove 2 and outlet cascade groove 3 both sides are provided with for steel wire 10 and wear the side seal of silk operation and wear a passage 32, side seal and wear in a passage 32 water is housed, the dual-side of described electrolytic pickling groove cover plate 7 is provided with cover plate water seal plate, the corresponding inserting side water seal of described cover plate water seal plate and wear in a passage 32 and be immersed in the water.Make like this to have realized water seal between electrolytic pickling groove cover plate 7 and inlet wire cascade groove 1, electrolytic pickling groove 2 and outlet cascade groove 3, prevent that the pickle solution volatilization in electrolytic pickling groove 2 from overflowing, save pickle solution consumption and protection of the environment.
As shown in Figure 1, shown in Figure 5, on described electrolytic pickling groove cover plate 7, have along the hole slot of electrolytic pickling groove cover plate 7 widths, in described hole slot, correspondence is equipped with line ball lid 13, and described line ball lid 13 lower ends are provided with line ball grinding stone, line ball grinding stone is pushed down steel wire 10, prevents that steel wire 10 from beating; The dual-side of described line ball lid 13 is provided with water seal plate, and described hole slot both sides correspondence is provided with water sealed tank, and water is housed in water sealed tank, and described water seal plate is corresponding to be inserted in water sealed tank and is immersed in the water.Make so also to have realized water seal between line ball lid 13 and electrolytic pickling groove cover plate 7, prevent that the pickle solution volatilization in electrolytic pickling groove 2 from overflowing, save pickle solution consumption and protection of the environment.
In the present invention, in order to prevent that steel wire 10 from occurring vibrations, jumping phenomena in the time bearing cascade impact, the rear and front end of described cascade groove pallet 16 is all provided with the first holder line grinding stone 20.In order to prevent that vibrations, jumping phenomena from appearring in steel wire 10 in the time bearing pickle solution and wash away, the rear and front end of described pickling work nest is all provided with the second holder line grinding stone 21.For the same object that steel wire 10 shakes, beats that prevents, in described inlet wire cascade groove 1, electrolytic pickling groove 2 and outlet cascade groove 3, be provided with holder line grinding stone 14.On cell body web plate 5 on cell body web plate 5 between described inlet wire cascade groove 1 and electrolytic pickling groove 2 and between electrolytic pickling groove 2 and outlet cascade groove 3, be provided with junction holder line grinding stone 4.
In addition, for ease of the pickling liquid measure in observation electrolytic pickling groove 2, on described electrolytic pickling groove 2, be provided with the liquidometer 28 that is used to indicate pickling liquid measure.
Claims (9)
1. closed electrolytic pickling unit, comprise the inlet wire cascade groove (1), at least one electrolytic pickling groove (2) and the outlet cascade groove (3) that arrange in turn along steel wire (10) direction of routing, between described inlet wire cascade groove (1) and electrolytic pickling groove (2), between adjacent electrolytic pickling groove (2), be all connected by cell body web plate (5) between electrolytic pickling groove (2) and outlet cascade groove (3); Described inlet wire cascade groove (1) front end is provided with inlet wire separated time grinding stone (6), steel wire (10) enters inlet wire cascade groove (1) after inlet wire separated time grinding stone (6) separated time, in described electrolytic pickling groove (2), be loaded with pickle solution, steel wire (10) enters in electrolytic pickling groove (2) out from inlet wire cascade groove (1), is fitted with the electrolytic pickling groove cover plate (7) that prevents that pickle solution volatilization from overflowing on electrolytic pickling groove (2); Described outlet cascade groove (3) rear end is provided with outlet separated time grinding stone (17), and steel wire (10) enters outlet cascade groove (3) from electrolytic pickling groove (2) out, then after outlet separated time grinding stone (17) separated time, leaves pickling unit; It is characterized in that: described electrolytic pickling groove cover plate (7) two ends are respectively arranged with incoming seal device and outlet sealing device, described incoming seal device is arranged on inlet wire cascade groove (1), described outlet sealing device is arranged on outlet cascade groove (3), incoming seal device, outlet sealing device can supply steel wire (10) to pass, and can prevent that the pickle solution in electrolytic pickling groove (2) from volatilizing and overflowing from two ends; In described electrolytic pickling groove (2), be provided with anodal work nest (18) and negative pole work nest (19), described steel wire (10) passes from anodal work nest (18) and negative pole work nest (19) top, in anodal work nest (18), positive plate (11) is installed, negative plate (12) is installed in negative pole work nest (19); Described anodal work nest (18), negative pole work nest (19) are connected with the liquid outlet of sour pump box (8) by acid inlet tube (31) respectively, the fluid inlet of described sour pump box (8) is by acid extracting pipe (27) and electrolytic pickling groove (2) internal communication, and sour pump box (8) is extracted the pickle solution in electrolytic pickling groove (2) be delivered to out in anodal work nest (18), negative pole work nest (19);
Described inlet wire cascade groove (1), electrolytic pickling groove (2) and outlet cascade groove (3) both sides are provided with for steel wire (10) and wear the side seal of silk operation and wear a passage (32), side seal and wear in a passage (32) water is housed, the dual-side of described electrolytic pickling groove cover plate (7) is provided with cover plate water seal plate, the corresponding inserting side water seal of described cover plate water seal plate and wear in a passage (32) and be immersed in the water.
2. closed electrolytic pickling unit as claimed in claim 1, it is characterized in that: described incoming seal device is water curtain type tightness system, it comprises waterproof pump box (9), cascade groove pallet (16) and cascade lid (15), described cascade groove pallet (16) is arranged in inlet wire cascade groove (1), cascade lid (15) is arranged on directly over cascade groove pallet (16), and described steel wire (10) passes between cascade groove pallet (16) and cascade lid (15); Described waterproof pump box (9) is arranged on inlet wire cascade groove (1) side, the water-in of waterproof pump box (9) is by drinking-water pipe (24) and inlet wire cascade groove (1) internal communication, the water outlet of waterproof pump box (9) is by water inlet pipe (25) and cascade lid (15) internal communication, waterproof pump box (9) is extracted the water in inlet wire cascade groove (1) be delivered to out in cascade lid (15), then water from cascade lid (15) free-falling to cascade groove pallet (16); Described outlet sealing device is identical with incoming seal apparatus structure.
3. closed electrolytic pickling unit as claimed in claim 1, it is characterized in that: on described electrolytic pickling groove cover plate (7), have along the hole slot of electrolytic pickling groove cover plate (7) width, in described hole slot, correspondence is equipped with line ball lid (13), described line ball lid (13) lower end is provided with line ball grinding stone, line ball grinding stone is pushed down steel wire (10), prevents that steel wire (10) from beating and Steel Wire Surface raffinate enters next cell body; The dual-side of described line ball lid (13) is provided with water seal plate, and described hole slot both sides correspondence is provided with water sealed tank, and water is housed in water sealed tank, and described water seal plate is corresponding to be inserted in water sealed tank and is immersed in the water.
4. closed electrolytic pickling unit as claimed in claim 1, it is characterized in that: the negative pole work nest (19) in described each electrolytic pickling groove (2) is at least one, each negative pole work nest (19) is furnished with two anodal work nests (18), and two anodal work nests (18) lay respectively at negative pole work nest (19) both sides.
5. closed electrolytic pickling unit as claimed in claim 2, is characterized in that: the rear and front end of described cascade groove pallet (16) is provided with the first holder line grinding stone (20).
6. closed electrolytic pickling unit as claimed in claim 1, is characterized in that: the rear and front end of described anodal work nest (18), negative pole work nest (19) is provided with the second holder line grinding stone (21).
7. closed electrolytic pickling unit as claimed in claim 1, is characterized in that: in described inlet wire cascade groove (1), electrolytic pickling groove (2) and outlet cascade groove (3), be provided with holder line grinding stone (14).
8. closed electrolytic pickling unit as claimed in claim 1, is characterized in that: on the cell body web plate (5) of the cell body web plate (5) between described inlet wire cascade groove (1) and electrolytic pickling groove (2) above and between electrolytic pickling groove (2) and outlet cascade groove (3), be provided with junction holder line grinding stone (4).
9. closed electrolytic pickling unit as claimed in claim 1, is characterized in that: on described electrolytic pickling groove (2), be provided with the liquidometer (28) that is used to indicate pickling liquid measure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210292259.9A CN102766899B (en) | 2012-08-16 | 2012-08-16 | Closed electrolytic pickling machine set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210292259.9A CN102766899B (en) | 2012-08-16 | 2012-08-16 | Closed electrolytic pickling machine set |
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| CN102766899A CN102766899A (en) | 2012-11-07 |
| CN102766899B true CN102766899B (en) | 2014-10-15 |
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| CN201210292259.9A Active CN102766899B (en) | 2012-08-16 | 2012-08-16 | Closed electrolytic pickling machine set |
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Families Citing this family (1)
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| CN112458478A (en) * | 2020-10-23 | 2021-03-09 | 宝钢集团南通线材制品有限公司 | Galvanized steel wire pickling tank and pickling production line |
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| US5449447A (en) * | 1990-10-08 | 1995-09-12 | Le Four Industriel Belge S.A. | Method and device for pickling and galvanizing |
| US6016819A (en) * | 1997-04-04 | 2000-01-25 | Murray; Gordon | High turbulence multiple stage wire pickling system |
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH049495A (en) * | 1990-04-27 | 1992-01-14 | Kobe Steel Ltd | Production of bright plated steel wire |
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2012
- 2012-08-16 CN CN201210292259.9A patent/CN102766899B/en active Active
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| US5449447A (en) * | 1990-10-08 | 1995-09-12 | Le Four Industriel Belge S.A. | Method and device for pickling and galvanizing |
| US6016819A (en) * | 1997-04-04 | 2000-01-25 | Murray; Gordon | High turbulence multiple stage wire pickling system |
| JP2006176803A (en) * | 2004-12-21 | 2006-07-06 | Sumitomo Denko Steel Wire Kk | Continuous pickling method for steel |
| CN101250707A (en) * | 2007-10-11 | 2008-08-27 | 浙江双友物流器械股份有限公司 | Steel plate acid-washing assembly line |
| CN201722428U (en) * | 2009-12-21 | 2011-01-26 | 江苏赛福天钢绳有限公司 | Rolled steel wire acid pickler |
| CN201817568U (en) * | 2010-10-21 | 2011-05-04 | 湘潭市得力焊材有限公司 | Steel wire rod surface pretreatment device |
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| CN102766899A (en) | 2012-11-07 |
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