CN106540993A - Hot rolling acid-cleaning plate - Google Patents
Hot rolling acid-cleaning plate Download PDFInfo
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- CN106540993A CN106540993A CN201611086290.1A CN201611086290A CN106540993A CN 106540993 A CN106540993 A CN 106540993A CN 201611086290 A CN201611086290 A CN 201611086290A CN 106540993 A CN106540993 A CN 106540993A
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- Prior art keywords
- pickling
- section
- slab
- acid
- hot rolling
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of hot rolling acid-cleaning plate, which prepares by the following method：The slab of 110 ~ 150m/min is taken, successively many bending straightenings of Jing, six sections of 10 ~ 20min of turbulence acid dip at 70 ~ 80 DEG C（Initial HCl concentration is 190～210g/l）, four sections of adverse current washings at 70 ~ 80 DEG C, hot-air seasoning is processed at 95 ~ 105 DEG C, winding is obtained final product, with the appropriate effect of pickling.
Description
Technical field
The present invention relates to acid-washed metal material technology, more particularly to hot rolling acid-cleaning plate.
Background technology
Hot rolling acid-cleaning plate is the sheet material formed Jing after pickling unit removal oxide layer, trimming, finishing with slab as raw material,
Main manufacturing procedure therein has welding, pickling, smooth, trimming, oiling etc., the surface quality and use requirement of hot rolling acid-cleaning plate
Between hot rolled plate and cold-reduced sheet, it is the preferable substitute products of part hot rolled plate and cold-reduced sheet.
Compared with common hot rolled plate, hot rolling acid-cleaning plate needs to remove its scale on surface, to improve the surface matter of steel
Amount, is easy to welding, oiling and japanning.The major surfaces quality problems of hot rolling acid-cleaning plate be overpickling (surface darkly, Huang Dengyan
Color), owe pickling (iron scale is not removed completely) etc..
The content of the invention
It is an object of the invention to provide a kind of hot rolling acid-cleaning plate, which solves the problem of overpickling or deficient pickling, with acid
Wash appropriate effect.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of hot rolling acid-cleaning plate, which prepares by the following method：
Step 1：The slab in course of conveying is taken, nine roller straightener straightening processings of Jing make the multiple bending straightening of slab；
Step 2：The slab that Jing steps 1 are processed carries out six sections of pickling, and the form of pickling is turbulence acid dip and total pickling time is
10～20min；The Acidwash solution temperature of every section of pickling be the initial HCl concentration of 70～80 DEG C and Acidwash solution be 190～
210g/l；In the Acidwash solution that six sections of pickling are used, the highest of its iron content is limited to 250g/l；
Step 3：The slab that Jing steps 2 are processed carries out four sections of washings, and the form of washing is countercurrent rinsing, the water temperature of per section of washing
For 70～80 DEG C；
Step 4：The slab that Jing steps 3 are processed carries out drying and processing, and the form of drying is hot-air seasoning, and the temperature of drying is 95
～105 DEG C；
Step 5：The slab winding that Jing steps 4 are processed, obtains final product；
Wherein, the transporting velocity of slab is 110～150m/min；
The slab include the carbon of 0.035～0.050wt%, the silicon of 0.005～0.010wt%, the manganese of 0.20～0.28wt%,
The phosphorus of 0.010～0.018wt%, the sulphur of 0.005～0.015wt%, the aluminium of 0.02～0.04wt%, and the surrender of the slab
For 195～205MPa, tension be 310～325MPa and elongation δ 50 is 40～45%.
Using above-mentioned technical proposal, slab is travelled forward by 110～150m/min so that the process of each step has
One suitable process time；And many bending straightenings of slab elder generation Jing are processed, the pattern of slab can be improved, while plate face can also be made
Oxide layer fully break phosphorus so that slab can be fully with hydrochloric acid reaction improving pickling effect in acid cleaning process；Exist relatively
Pickling in the acid solution of high concentration, slab can reduce the situation of overpickling in acid cleaning process through rational multistage pickling, and layer
The progressive acid cleaning process of layer reduces the excessive possibility of iron content in pickle after same section pickling, reduces iron content and excessively causes
Deficient pickling situation, further improve pickling effect；Then by countercurrent rinsing at four sections 70～80 DEG C by steel slab surface
Acid solution is cleaned completely, and is air-dried with 95～105 DEG C, the slab after protection pickling in time, is obtained physical property and is not destroyed serious
Product, keeps the original performance of product.
More preferably：The 1st section of pickling that six sections of acid cleaning process include setting gradually along slab conveying direction, the 2nd section
Pickling, the 3rd section of pickling, the 4th section of pickling, the 5th section of pickling and the 6th section of pickling；Wherein, in the Acidwash solution of the 1st section of pickling, iron contains
The highest of amount is limited to 250g/l, and in the Acidwash solution of the 2nd section of pickling, the highest of iron content is limited to 200g/l, the acid of the 3rd section of pickling
In dilution, the highest of iron content is limited to 150g/l, and in the Acidwash solution of the 4th section of pickling, the highest of iron content is limited to 100g/l, the
In the Acidwash solution of 5 sections of pickling and the 6th section of pickling, the highest limit of iron content is 80g/l.
Using above-mentioned technical proposal, reduce obstruction of the iron content to pickling in Acidwash solution, can further improve pickling effect
Really, improve the brightness of the slab after pickling.
More preferably：Four sections are washed in the water for using, and the highest of its electrical conductivity is limited to 350 μ s/cm and the Cl in which-
The highest of content is limited to 35mg/l.
Using above-mentioned technical proposal, reduce too high electrical conductivity and Cl in rinsing solution-Content can be entered to the obstruction washed
One step improves the effect of cleaning slab surface acid liquid.
More preferably：Total washing time of four sections of washings is 3～10s, and its water velocity is 10～40m3/hr。
Using above-mentioned technical proposal, while acid solution is fully washed away, reducing energy consumption.
More preferably：The time of drying is 0.5～5s.
Using above-mentioned technical proposal, while drying protection slab, the long shadow to slab physical property of drying is reduced
Ring.
More preferably：Pickling operation is carried out in descaling bath, and water washing operations are carried out in rinsing bowl；Different descaling baths
Between, be equipped between the 6th section of descaling bath and the 1st section of rinsing bowl, between different rinsing bowl it is molten on slab for extruding
The extruding roller mechanism of liquid, the extruding roller mechanism include the upper compression roller be arrangeding in parallel and lower compression roller, the upper compression roller and
Thickness of the gap between lower compression roller for slab.
Using above-mentioned technical proposal, by extruding roller mechanism by the acid solution in Jing difference pickling sections or slab on washing section
Or aqueous are removed, and reduce its impact to subsequent technique.
More preferably：The acid pickle of six sections of pickling processes of Jing carries out recycling as follows：
Step a：Waste acid recovery liquid, the impurity being filtered to remove in waste liquid；
Step b：The acid pickle of Jing steps a process is carried out into pre-concentration process；
Step c：The acid pickle of Jing steps b process is added in roaster, 180～200 DEG C is warming up to and is caused to be formed in roaster
Acid mist, is passed through vapor and oxygen in the inner, obtains the fluid containing HCl and the liquid containing iron oxide after reaction completely, point
Separate out iron powder and the fluid containing HCl is carried out into condensation recovery, obtain final product.
Using above-mentioned technical proposal, the HCl in waste acid recovery liquid, reduce atmosphere pollution and make full use of the energy.
In sum, the invention has the advantages that：
1st, the situation of slab overpickling (surface darkly, the color such as Huang) or deficient pickling (iron scale is not removed completely), plate are reduced
Base lustrous surface and white or brilliant white, its surface quality obtain larger raising；
2nd, after before processing, the change of the physical property such as surrender, tension, elongation is little, enhances product performance；
3rd, to every strict control during production so as to which collimation is good, with large-scale production using value；
4th, the HCl in acid pickle is recycled in processing procedure, reduces atmosphere pollution and make full use of the energy.
Specific embodiment
This specific embodiment is only explanation of the invention, and which is not limitation of the present invention, people in the art
Member can make the modification for not having creative contribution after this specification is read as needed to the present embodiment, but as long as at this
All protected by Patent Law in the protection domain of invention.
Highest limit of the present invention refers to and needs to change to use new body when the parameter is reached in the system
System.
Embodiment 1：A kind of hot rolling acid-cleaning plate, which prepares by the following method：
Step 1：The slab (each property of slab raw material is as shown in table 1) that transporting velocity is 110～150m/min is taken, nine rollers of Jing are rectified
Straight machine straightening processing, makes the multiple bending straightening of slab；
Step 2：The slab that Jing steps 1 are processed carry out successively the 1st section of pickling, the 2nd section of pickling, the 3rd section of pickling, the 4th section of pickling,
5th section of pickling and the 6th section of pickling, the form of pickling is turbulence acid dip and total pickling time is 10～20min；The acid of every section of pickling
Dilution temperature is 70～80 DEG C and the initial HCl concentration of Acidwash solution is 190～210g/l；And the pickling of the 1st section of pickling
In solution, the highest of iron content is limited to 250g/l, and in the Acidwash solution of the 2nd section of pickling, the highest of iron content is limited to 200g/l, and the 3rd
In the Acidwash solution of section pickling, the highest of iron content is limited to 150g/l, the highest limit of iron content in the Acidwash solution of the 4th section of pickling
Highest limit for iron content in the Acidwash solution of 100g/l, the 5th section of pickling and the 6th section of pickling is 80g/l；
The acid pickle of six sections of pickling processes of Jing carries out recycling as follows：Step a：Waste acid recovery liquid, is filtered to remove
Impurity in waste liquid；Step b：The acid pickle of Jing steps a process is carried out into pre-concentration process；Step c：By the process of Jing steps b
Acid pickle is added in roaster, is warming up to 180～200 DEG C and is caused acid mist is formed in roaster, is passed through vapor and oxygen in the inner
Gas, obtains the fluid containing HCl and the liquid containing iron oxide after reaction completely, isolates iron powder and by the fluid containing HCl
Condensation recovery is carried out, is obtained final product；
Step 3：The slab that Jing steps 2 are processed carries out four sections of washings, and the form of washing is countercurrent rinsing, the water temperature of per section of washing
For 70～80 DEG C；Four sections are washed in the water for using, and the highest of its electrical conductivity is limited to 350 μ s/cm and the Cl in which-The highest of content
It is limited to 35mg/l；Total washing time of four sections of washings is 3～10s, and its water velocity is 10～40m3/hr；
Step 4：The slab that Jing steps 3 are processed carries out drying and processing, and the form of drying is hot-air seasoning, and the temperature of drying is 95
～105 DEG C, the time of drying is 0.5～5s；
Step 5：The slab winding that Jing steps 4 are processed, obtains final product；
Pickling operation is carried out in descaling bath, and water washing operations are carried out in rinsing bowl；Between different descaling baths, the acid of final stage
It is equipped between washing trough and the 1st section of rinsing bowl, between different rinsing bowl for extruding the extruding roller mechanism of the solution on slab,
Extruding roller mechanism includes the upper compression roller be arrangeding in parallel and lower compression roller, and the gap between upper compression roller and lower compression roller is slab
Thickness.
The information of the slab raw material of 1 embodiment 1 of table
Embodiment 2：A kind of hot rolling acid-cleaning plate, the difference with embodiment 1 is, each property such as table 2 of slab raw material
It is shown.
The information of the slab raw material of 2 embodiment 2 of table
Embodiment 3：A kind of hot rolling acid-cleaning plate, the difference with embodiment 1 is, each property such as table 3 of slab raw material
It is shown.
The information of the slab raw material of 3 embodiment 3 of table
Embodiment 4：A kind of hot rolling acid-cleaning plate, the difference with embodiment 1 is, each property such as table 4 of slab raw material
It is shown.
The information of the slab raw material of 4 embodiment 4 of table
Embodiment 5：A kind of hot rolling acid-cleaning plate, the difference with embodiment 1 is, the 1st section of pickling, the 2nd section of pickling,
In 3 sections of pickling, the Acidwash solution of the 4th section of pickling, the 5th section of pickling and the 6th section of pickling, the highest limit of iron content is 250g/l.
Embodiment 6：A kind of hot rolling acid-cleaning plate, the difference with embodiment 1 are that four sections are washed in the water for using, its
The highest of electrical conductivity is limited to 500 μ s/cm.
Embodiment 7：A kind of hot rolling acid-cleaning plate, the difference with embodiment 1 are that four sections are washed in the water for using, its
Interior Cl-The highest of content is limited to 60mg/l.
Embodiment 8：A kind of hot rolling acid-cleaning plate, the difference with embodiment 1 are that total washing time of four sections of washings is
1s, and its water velocity is 5m3/hr。
Embodiment 9：A kind of hot rolling acid-cleaning plate, the difference with embodiment 1 are that the time of drying is 10s.
Embodiment 10：A kind of hot rolling acid-cleaning plate, the difference with embodiment 1 is, not between different descaling baths,
Any position between 6 sections of descaling bath and the 1st section of rinsing bowl, between different rinsing bowls arranges extruding roller mechanism.
Performance characterization
1st, test specimen：A kind of hot rolling acid-cleaning plate of embodiment 1-10.
2nd, surface quality is characterized：Observe and record the surface color of test specimen；Testing result is as shown in table 5.
3rd, quantitative measurement：Surrender Y.S, tension T.S are carried out to the slab raw material and final products of test specimen and is stretched
The test of long rate δ 50；Testing result is as shown in table 5.
5 performance characterization data of table is counted
4th, parallel test：Repeated 100 times with the preparation process of embodiment 1-10, table is carried out to each sample then
Face quality characterization and quantitative measurement test, obtain the result of the test similar to table 5.
Claims (7)
1. a kind of hot rolling acid-cleaning plate, it is characterised in which prepares by the following method：
Step 1：The slab in course of conveying is taken, nine roller straightener straightening processings of Jing make the multiple bending straightening of slab；
Step 2：The slab that Jing steps 1 are processed carries out six sections of pickling, and the form of pickling is turbulence acid dip and total pickling time is
10~20min；The Acidwash solution temperature of every section of pickling is 70 ~ 80 DEG C and the initial HCl concentration of Acidwash solution is 190～210g/
l；In the Acidwash solution that six sections of pickling are used, the highest of its iron content is limited to 250 g/l；
Step 3：The slab that Jing steps 2 are processed carries out four sections of washings, and the form of washing is countercurrent rinsing, the water temperature of per section of washing
For 70 ~ 80 DEG C；
Step 4：The slab that Jing steps 3 are processed carries out drying and processing, and the form of drying is hot-air seasoning, and the temperature of drying is 95
~105℃；
Step 5：The slab winding that Jing steps 4 are processed, obtains final product；
Wherein, the transporting velocity of slab is 110 ~ 150m/min；
The slab include the carbon of 0.035 ~ 0.050wt%, the silicon of 0.005 ~ 0.010wt%, the manganese of 0.20 ~ 0.28wt%, 0.010 ~
The phosphorus of 0.018wt%, the sulphur of 0.005 ~ 0.015wt%, the aluminium of 0.02 ~ 0.04wt%, and the surrender of the slab be 195 ~
205MPa, tension are 310 ~ 325MPa and elongation δ 50 is 40 ~ 45%.
2. hot rolling acid-cleaning plate according to claim 1, it is characterised in that six sections of acid cleaning process are included along slab conveying direction
The 1st section of pickling setting gradually, the 2nd section of pickling, the 3rd section of pickling, the 4th section of pickling, the 5th section of pickling and the 6th section of pickling；Wherein,
In the Acidwash solution of the 1st section of pickling, the highest of iron content is limited to 250 g/l, and in the Acidwash solution of the 2nd section of pickling, iron content is most
Height is limited to 200g/l, and in the Acidwash solution of the 3rd section of pickling, the highest of iron content is limited to 150g/l, the Acidwash solution of the 4th section of pickling
The highest of middle iron content is limited to the highest limit of iron content in the Acidwash solution of 100g/l, the 5th section of pickling and the 6th section of pickling and is
80g/l。
3. hot rolling acid-cleaning plate according to claim 1, it is characterised in that four sections are washed in the water for using, its electrical conductivity
Highest is limited to 350 μ s/cm and the Cl in which-The highest of content is limited to 35mg/l.
4. hot rolling acid-cleaning plate according to claim 1, it is characterised in that total washing times of four sections of washings are 3 ~ 10s, and
Its water velocity is 10 ~ 40m3/hr。
5. hot rolling acid-cleaning plate according to claim 1, it is characterised in that the time of drying is 0.5 ~ 5s.
6. hot rolling acid-cleaning plate according to claim 2, it is characterised in that pickling operation is carried out in descaling bath, washing behaviour
Work is carried out in rinsing bowl；Between different descaling baths, between the 6th section of descaling bath and the 1st section of rinsing bowl, different rinsing bowl it
Between be equipped with for extruding the extruding roller mechanism of the solution on slab, the extruding roller mechanism includes the upper compression roller be arrangeding in parallel
With lower compression roller, thickness of the gap between the upper compression roller and lower compression roller for slab.
7. hot rolling acid-cleaning plate according to claim 1, it is characterised in that the acid pickle of six sections of pickling processes of Jing is by such as lower section
Method carries out recycling：
Step a：Waste acid recovery liquid, the impurity being filtered to remove in waste liquid；
Step b：The acid pickle of Jing steps a process is carried out into pre-concentration process；
Step c：The acid pickle of Jing steps b process is added in roaster, 180 ~ 200 DEG C is warming up to and is caused in roaster, to form acid
Mist, is passed through vapor and oxygen in the inner, obtains the fluid containing HCl and the liquid containing iron oxide after reaction completely, separate
Go out iron powder and the fluid containing HCl is carried out into condensation recovery, obtain final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086290.1A CN106540993B (en) | 2016-12-01 | 2016-12-01 | Hot rolling acid-cleaning plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086290.1A CN106540993B (en) | 2016-12-01 | 2016-12-01 | Hot rolling acid-cleaning plate |
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| CN106540993A true CN106540993A (en) | 2017-03-29 |
| CN106540993B CN106540993B (en) | 2018-11-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6462485A (en) * | 1987-08-31 | 1989-03-08 | Sumitomo Metal Ind | Method for pickling hot rolled steel sheet at high speed |
| CN101745544A (en) * | 2010-01-04 | 2010-06-23 | 湖南华菱涟源钢铁有限公司 | Method for controlling transverse thickness difference of medium-low grade electrical steel |
| CN103255429A (en) * | 2013-04-06 | 2013-08-21 | 莱芜市泰山冷轧板有限公司 | Pickling method of hot rolled steel strip |
| CN104480391A (en) * | 2014-11-24 | 2015-04-01 | 江苏省沙钢钢铁研究院有限公司 | Hot-rolled pickled plate and production method thereof |
| CN105925891A (en) * | 2016-07-15 | 2016-09-07 | 武汉钢铁股份有限公司 | Hot-rolled pickled steel with tensile strength of 310MPa grade and used for high-surface quality automobiles, and production method thereof |
-
2016
- 2016-12-01 CN CN201611086290.1A patent/CN106540993B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6462485A (en) * | 1987-08-31 | 1989-03-08 | Sumitomo Metal Ind | Method for pickling hot rolled steel sheet at high speed |
| CN101745544A (en) * | 2010-01-04 | 2010-06-23 | 湖南华菱涟源钢铁有限公司 | Method for controlling transverse thickness difference of medium-low grade electrical steel |
| CN103255429A (en) * | 2013-04-06 | 2013-08-21 | 莱芜市泰山冷轧板有限公司 | Pickling method of hot rolled steel strip |
| CN104480391A (en) * | 2014-11-24 | 2015-04-01 | 江苏省沙钢钢铁研究院有限公司 | Hot-rolled pickled plate and production method thereof |
| CN105925891A (en) * | 2016-07-15 | 2016-09-07 | 武汉钢铁股份有限公司 | Hot-rolled pickled steel with tensile strength of 310MPa grade and used for high-surface quality automobiles, and production method thereof |
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| CN106540993B (en) | 2018-11-13 |
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