CN107326379A - The method of pushing acid washing unit pickling electrical steel - Google Patents
The method of pushing acid washing unit pickling electrical steel Download PDFInfo
- Publication number
- CN107326379A CN107326379A CN201710438051.6A CN201710438051A CN107326379A CN 107326379 A CN107326379 A CN 107326379A CN 201710438051 A CN201710438051 A CN 201710438051A CN 107326379 A CN107326379 A CN 107326379A
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- CN
- China
- Prior art keywords
- acid
- pickling
- potcher
- tanks
- washing unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/021—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by dipping
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
- C23G3/029—Associated apparatus, e.g. for pretreating or after-treating for removing the pickling fluid from the objects
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of method of pushing acid washing unit pickling electrical steel, the pushing acid washing unit includes sour tank, potcher and squeeze roll；The total acid concentration of sour tank is 180~220g/L；Acid cleaning process section speed control is in >=120m/min；Potcher temperature control is at 55~65 DEG C；Roller pressure is extracted for 4.0~5.0bar between descaling bath and potcher, and remaining extracts roller pressure for 3.5~4.0bar.This method technology controlling and process is simple, reduces the link that medicament is added in technological process, has made technique in order, reduced production cost；This method ensure that the quality of production of electrical sheet, realizes acid-cleaning plate surface quality and greatly improves, improves the surface grade after cold rolling band steel；This method drastically increases the surface quality of push-and-pull unit acid-cleaning plate in the case of no change equipment or addition medicament.
Description
Technical field
The invention belongs to cold-rolling pickling field, especially a kind of method of pushing acid washing unit pickling electrical steel.
Background technology
Current electrical sheet has obtained tremendous development in the production of China, and domestic many sheet billet productions can be produced successfully
In low code non-oriented electrical steel, but electrical sheet is higher due to silicone content, and surface easily forms silicon olivine class iron scale, difficult
Removed in pickling, influence steel strip surface quality, surface has blackstreak after pickling.
It is the work of 3.0~6.0mm straight carbon steels/half that application number CN201210143914.4 patent application, which discloses a kind of thickness,
The acid washing method of skill electrical sheet.This method removes straight carbon steel/semi-technological electrical steel with the hydrochloric acid pickler added with acid pickling promotor
Scale on surface, pickling speed improve more than 35%, the similar effect in import acid pickling promotor of surface quality.But should
Require that free acid concentration is reduced to 110~120g/L and Fe from 180~200g/L in hydrochloric acid pickler in method2+Concentration rises to
50~70g/L, is different from the concentration control that the pickling unit at scene is just being produced, and increase produces the control difficulty during steel grade；Simultaneously
Free acid concentration reduces acid solution activity in reduction pickling, and acid pickling promotor is added again and improves pickling efficiency, two control devices
There is contradiction.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method of pushing acid washing unit pickling electrical steel, to ensure acid
Quality after washing.
In order to solve the above technical problems, the technical solution used in the present invention is：The pushing acid washing unit includes acid
Tank, potcher and squeeze roll；The acid cleaning process section speed control is in >=120m/min；Potcher temperature control is 55~65
℃。
Sour tank of the present invention is level Four；1# acid tanks, the temperature of 2# acid tanks be 40~60 DEG C, 3# acid tanks, 4# acid tanks
Temperature is 40~50 DEG C；
The total acid concentration of sour tank of the present invention is 180~220g/L, and the free acid concentration of 4# acid tanks is 130~160g/L.It is described
The free acid concentration of 1# acid tanks is 30~50g/L, and the free acid concentration of 2# acid tanks is 60~90g/L, and the free acid of 3# acid tanks is dense
Spend for 100~120g/L.
Roller pressure is extracted for 4.0~5.0bar between descaling bath and potcher of the present invention, and remaining extracts roller pressure
For 3.5~4.0bar.
It is using the beneficial effect produced by above-mentioned technical proposal：Present invention process control is simple, reduces technological process
The link of middle addition medicament, has made technique in order, has reduced production cost；This invention ensures that the quality of production of electrical sheet, is realized
Acid-cleaning plate surface quality is greatly improved, and improves the surface grade after cold rolling band steel；The present invention is in no change equipment or adds
In the case of adding medicine, the surface quality of push-and-pull unit acid-cleaning plate is drastically increased.
Embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
The method of this pushing acid washing unit pickling electrical steel includes the control of pickling concentration, pickling temperature control, pickling speed
Control, pickling squeeze roll Stress control and potcher temperature control；Technique is as described below：
（1）Pickling concentration is controlled：The total acid concentration control of 1# acid tanks is in 180~220g/L, free 30~50g/L of acid concentration；2# acid
The total acid concentration control of tank is in 180~220g/L, free 60~90g/L of acid concentration；The control of 3# acid tanks total acid concentration 180~
220g/L, free 100~120g/L of acid concentration；The control of 4# acid tanks total acid concentration 180~220g/L, free acid concentration 130~
160g/L。
（2）Pickling temperature is controlled：1# acid tanks temperature control is at 40~60 DEG C；2# acid tanks temperature control is at 40~60 DEG C；3#
Acid tank temperature control is at 40~50 DEG C；4# acid tanks temperature control is at 40~50 DEG C.
（3）Pickling speed is controlled：Acid cleaning process section speed control is in >=120m/min.
（4）Pickling squeeze roll Stress control：Improve squeeze roll and extract effect, roll-in will be extracted between descaling bath and potcher
Power improves 0.5~1.0bar, and remaining is extracted roller pressure setting pressure and improves 0.3~0.5bar；So descaling bath and potcher it
Between extract roller pressure for 4.0~5.0bar, remaining extracts roller pressure for 3.5~4.0bar.
（5）Potcher temperature control：Potcher temperature control is at 55~65 DEG C.
The design concept of this method is：1#, 2# acid tank concentration are low, influence small to strip surface quality, suitably increase 1#, 2#
Bath temperature degree, while can avoiding the HCl from volatilizing, increases 1#, 2# pickling ability；3#, 4# acid tank temperature are reduced, is to reduce pickling
Belt steel surface temperature is exported, the speed that electrical sheet reacts in potcher is reduced.Pickling speed is improved to be conducive to improving increase first
The hitting power of nozzle slot is rinsed, cleaning performance is improved；Secondly chlorion of the electrical sheet with remained on surface in potcher is reduced anti-
The time answered；Speed maximum is relevant with acid tank length, and generally speed is not above 160m/min, more than maximal rate
Easily occur owing pickling defect.
Embodiment 1：The method of this pushing acid washing unit pickling electrical steel uses following concrete technologies.
Pickling concentration is controlled：The total acid concentration control of 1# acid tanks is in 205g/L, free acid concentration 42g/L；2# acid tank total acids are dense
Degree control is in 210g/L, free acid concentration 76g/L；The total acid concentration control of 3# acid tanks is in 207g/L, free acid concentration 100g/L；4#
The sour total acid concentration control of tank is in 210g/L, free acid concentration 153g/L.
Pickling temperature is controlled：1# acid tanks temperature control is at 54 DEG C；2# acid tanks temperature control is at 60 DEG C；3# acid tank temperature controls
At 45 DEG C；4# acid tanks temperature control is at 42 DEG C.
Pickling speed is controlled：Acid cleaning process section speed control is in 160m/min.
After pickling, surface of steel plate is without deficient pickling and overpickling phenomenon；Without parking spot, wipe scuffing, foreign matter and iron scale pressure
Enter, there is slight surface to be mingled with.
Pickling squeeze roll Stress control：Roller pressure is extracted between descaling bath and potcher for 4.5bar, remaining extracts roll-in
Power is 3.5bar.
Potcher temperature control：Potcher temperature control is at 59 DEG C.
After pickling, surface of steel plate is without deficient pickling and overpickling phenomenon；Without parking spot, wipe scuffing, foreign matter and iron scale pressure
Enter, there is slight surface to be mingled with.
Embodiment 2：The method of this pushing acid washing unit pickling electrical steel uses following concrete technologies.
Pickling concentration is controlled：The total acid concentration control of 1# acid tanks is in 195g/L, free acid concentration 46g/L；2# acid tank total acids are dense
Degree control is in 200g/L, free acid concentration 90g/L；The total acid concentration control of 3# acid tanks is in 193g/L, free acid concentration 120g/L；4#
The sour total acid concentration control of tank is in 193g/L, free acid concentration 150g/L.
Pickling temperature is controlled：1# acid tanks temperature control is at 50 DEG C；2# acid tanks temperature control is at 56 DEG C；3# acid tank temperature controls
At 40 DEG C；4# acid tanks temperature control is at 40 DEG C.
Pickling speed is controlled：Acid cleaning process section speed control is in 120m/min.
Pickling squeeze roll Stress control；Roller pressure is extracted between descaling bath and potcher for 4.5bar, remaining extracts roll-in
Power is 3.8 bar.
Potcher temperature control：Potcher temperature control is at 62 DEG C.
After pickling, surface of steel plate is without deficient pickling and overpickling phenomenon；Without parking spot, wipe scuffing, foreign matter and iron scale pressure
Enter, there is slight surface to be mingled with.
Embodiment 3：The method of this pushing acid washing unit pickling electrical steel uses following concrete technologies.
Pickling concentration is controlled：The total acid concentration control of 1# acid tanks is in 180g/L, free acid concentration 35g/L；2# acid tank total acids are dense
Degree control is in 190g/L, free acid concentration 60g/L；The total acid concentration control of 3# acid tanks is in 220g/L, free acid concentration 110g/L；4#
The sour total acid concentration control of tank is in 220g/L, free acid concentration 160g/L.
Pickling temperature is controlled：1# acid tanks temperature control is at 60 DEG C；2# acid tanks temperature control is at 50 DEG C；3# acid tank temperature controls
At 50 DEG C；4# acid tanks temperature control is at 45 DEG C.
Pickling speed is controlled：Acid cleaning process section speed control is in 150m/min.
Pickling squeeze roll Stress control；Roller pressure is extracted between descaling bath and potcher for 5.0bar, remaining extracts roll-in
Power is 3.6 bar.
Potcher temperature control：Potcher temperature control is at 55 DEG C.
After pickling, surface of steel plate is without deficient pickling and overpickling phenomenon；Without parking spot, wipe scuffing, foreign matter and iron scale pressure
Enter, no surface is mingled with.
Embodiment 4：The method of this pushing acid washing unit pickling electrical steel uses following concrete technologies.
Pickling concentration is controlled：The total acid concentration control of 1# acid tanks is in 210g/L, free acid concentration 50g/L；2# acid tank total acids are dense
Degree control is in 180g/L, free acid concentration 80g/L；The total acid concentration control of 3# acid tanks is in 200g/L, free acid concentration 105g/L；4#
The sour total acid concentration control of tank is in 180g/L, free acid concentration 140g/L.
Pickling temperature is controlled：1# acid tanks temperature control is at 45 DEG C；2# acid tanks temperature control is at 40 DEG C；3# acid tank temperature controls
At 48 DEG C；4# acid tanks temperature control is at 50 DEG C.
Pickling speed is controlled：Acid cleaning process section speed control is in 130m/min.
Pickling squeeze roll Stress control；Roller pressure is extracted between descaling bath and potcher for 4.2bar, remaining extracts roll-in
Power is 4.0 bar.
Potcher temperature control：Potcher temperature control is at 65 DEG C.
After pickling, surface of steel plate is without deficient pickling and overpickling phenomenon；Scratched without parking spot, wiping, have slight foreign matter and oxygen
Change iron sheet press-in, there is slight surface to be mingled with.
Embodiment 5：The method of this pushing acid washing unit pickling electrical steel uses following concrete technologies.
Pickling concentration is controlled：The total acid concentration control of 1# acid tanks is in 220g/L, free acid concentration 30g/L；2# acid tank total acids are dense
Degree control is in 220g/L, free acid concentration 70g/L；The total acid concentration control of 3# acid tanks is in 180g/L, free acid concentration 115g/L；4#
The sour total acid concentration control of tank is in 188g/L, free acid concentration 130g/L.
Pickling temperature is controlled：1# acid tanks temperature control is at 40 DEG C；2# acid tanks temperature control is at 48 DEG C；3# acid tank temperature controls
At 42 DEG C；4# acid tanks temperature control is at 47 DEG C.
Pickling speed is controlled：Acid cleaning process section speed control is in 140m/min.
Pickling squeeze roll Stress control；Roller pressure is extracted between descaling bath and potcher for 4.0bar, remaining extracts roll-in
Power is 3.7 bar.
Potcher temperature control：Potcher temperature control is at 60 DEG C.
After pickling, surface of steel plate is without deficient pickling and overpickling phenomenon；Scratched without parking spot, wiping, have slight foreign matter and oxygen
Change iron sheet press-in, there is slight surface to be mingled with.
Claims (5)
1. a kind of method of pushing acid washing unit pickling electrical steel, it is characterised in that：The pushing acid washing unit include sour tank,
Potcher and squeeze roll；The acid cleaning process section speed control is in >=120m/min；Potcher temperature control is at 55~65 DEG C.
2. the method for pushing acid washing unit pickling electrical steel according to claim 1, it is characterised in that：The sour tank is four
Level；1# acid tanks, the temperature of 2# acid tanks are 40~60 DEG C, and 3# acid tanks, the temperature of 4# acid tanks are 40~50 DEG C.
3. the method for pushing acid washing unit pickling electrical steel according to claim 1, it is characterised in that：The sour tank total acid
Concentration is 180~220g/L, and the free acid concentration of 4# acid tanks is 130~160g/L.
4. the method for pushing acid washing unit pickling electrical steel according to claim 3, it is characterised in that：The 1# acid tanks
Free acid concentration is 30~50g/L, and the free acid concentrations of 2# acid tanks is 60~90g/L, the free acid concentrations of 3# acid tanks for 100~
120g/L。
5. the method for the pushing acid washing unit pickling electrical steel according to claim 1-4 any one, it is characterised in that：
Roller pressure is extracted for 4.0~5.0bar between the descaling bath and potcher, and remaining extracts roller pressure for 3.5~4.0bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710438051.6A CN107326379A (en) | 2017-06-06 | 2017-06-06 | The method of pushing acid washing unit pickling electrical steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710438051.6A CN107326379A (en) | 2017-06-06 | 2017-06-06 | The method of pushing acid washing unit pickling electrical steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107326379A true CN107326379A (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710438051.6A Pending CN107326379A (en) | 2017-06-06 | 2017-06-06 | The method of pushing acid washing unit pickling electrical steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113430527A (en) * | 2021-06-03 | 2021-09-24 | 北京首钢股份有限公司 | Method for eliminating scratch defect of strip steel by acid cleaning |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204529986U (en) * | 2015-02-13 | 2015-08-05 | 苏州赛菲集团有限公司 | The totally-enclosed pickling installation of a kind of stainless steel |
| WO2015170755A1 (en) * | 2014-05-09 | 2015-11-12 | 新日鐵住金株式会社 | Low magnetorestriction oriented electromagnetic steel sheet with low iron loss |
-
2017
- 2017-06-06 CN CN201710438051.6A patent/CN107326379A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015170755A1 (en) * | 2014-05-09 | 2015-11-12 | 新日鐵住金株式会社 | Low magnetorestriction oriented electromagnetic steel sheet with low iron loss |
| CN204529986U (en) * | 2015-02-13 | 2015-08-05 | 苏州赛菲集团有限公司 | The totally-enclosed pickling installation of a kind of stainless steel |
Non-Patent Citations (2)
| Title |
|---|
| 夏翠莉等: "《冷轧带钢生产》", 31 October 2011, 冶金工业出版社 * |
| 邹家祥等: "《轧钢机械理论与结构设计（下册）》", 30 November 1993, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113430527A (en) * | 2021-06-03 | 2021-09-24 | 北京首钢股份有限公司 | Method for eliminating scratch defect of strip steel by acid cleaning |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171107 |
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