CN107541737A - The method for improving belt steel surface pickling quality - Google Patents

The method for improving belt steel surface pickling quality Download PDF

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Publication number
CN107541737A
CN107541737A CN201610481433.2A CN201610481433A CN107541737A CN 107541737 A CN107541737 A CN 107541737A CN 201610481433 A CN201610481433 A CN 201610481433A CN 107541737 A CN107541737 A CN 107541737A
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pickling
ratio
iron scale
belt steel
steel surface
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CN201610481433.2A
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CN107541737B (en
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陶登国
李晓林
宋艳丽
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
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Abstract

The invention provides a kind of method for improving belt steel surface pickling quality, including：The ratio Ψ 1 of iron scale in the unit area on the surface for detecting the strip before the strip enters shot-blasting machine；The ball blast amount P to jettisoning of the shot-blasting machine is controlled according to the ratio Ψ 1 of the iron scaleqWith ejection velocity Pv；Pickling flow F in descaling bath is controlled according to the ratio Ψ 1 of the iron scale.The method of the raising belt steel surface pickling quality of the present invention, the situation of the iron scale of belt steel surface is detected using surface defects detection technology before ball blast, pickling, and control adjustment in real time is carried out to ball blast, pickling process according to testing result, so as to ensure the uniformity of board surface quality after pickling.

Description

The method for improving belt steel surface pickling quality
Technical field
It is more particularly to a kind of to improve belt steel surface pickling matter the present invention relates to the ball blast pickling technology in a kind of metallurgical industry The method of amount.
Background technology
To obtain great surface quality, the strip after hot rolling and normalizing annealing needs to remove incoming band steel table before cold rolling The iron scale of layer.Ball blast, pickling are the common technologies for being used for removing belt steel surface iron scale at present.
For annealing and pickling continuous production process, the surface quality and pickling operating efficiency after pickling are both by preceding process The structure of supplied materials iron scale and the influence of distribution, also by this process acid cleaning process parameter such as pickling medium, acid strength, pickling The influence of temperature, pickling flow and pickling speed.Generally, the speed of production of continuous annealing pickling unit is constant , acid strength and pickling temperature are substantially also fixed due to adjustment time length.Therefore, the surface quality master after pickling To depend on structure and distribution situation, the ball blast technique and pickling flow of supplied materials iron scale.
The structure and distribution situation of supplied materials iron scale by the hot-rolled production process such as strip of strip chemical composition, heating The influence of the composite factors such as the calorific value of stove, time inside furnace, water under high pressure dephosphorization, finishing temperature, coiling temperature, section cooling, simultaneously Also there is substantial connection with factors such as the furnace atmosphere in normalizing annealing process, furnace temperature, water cooling speed.Obviously, numerous influences because If have in element it is one or more occur fluctuating all the structure of supplied materials iron scale and distribution will be caused to change.That is, supplied materials Structure type of the iron scale in strip length direction and width is different, and it is also uneven that it, which is distributed,.
At present for the different coil of strips of same steel grade and the different positions of same coil of strip in the controlling of production process of annealing and pickling Put using identical, fixed ball blast, acid cleaning process, do not consider difference of the strip in diverse location iron scale.Strip The defects of plate face after pickling owes pickling, overpickling, aberration exists simultaneously, and not only board surface quality is uneven, and production process In pill consumption, acid consumption it is also larger.
When coils of hot-rolled steel scale structure and distribution change, variable technological parameter can not in ball blast, pickling Dynamic adjustment is done according to the fluctuation of supplied materials, the defects of causing the plate face after strip pickling to owe pickling, overpickling, aberration while deposited , and the difference of the surface quality of different coil of strips and same coil of strip diverse location is obvious；For the different coil of strips of same steel grade And the diverse location of same coil of strip is also unfavorable for pill consumption and the control of acid consumption using identical, fixed ball blast, acid cleaning process System, add the pollution for wasting and also exacerbating environment.
The content of the invention
It is an object of the present invention to provide a kind of method for improving belt steel surface pickling quality, the inspection based on surface defect Survey to adjust the parameter of ball blast and acid cleaning process, so as to realize stabilization, uniform pickling, ensure the quality of belt steel surface after pickling Uniformity.
The method of the raising belt steel surface pickling quality of the present invention, including：Detected before the strip enters shot-blasting machine The ratio Ψ 1 of iron scale in the unit area on the surface of the strip；According to being controlled the ratio Ψ 1 of the iron scale The ball blast amount P to jettisoning of shot-blasting machineqWith ejection velocity Pv；Pickling in descaling bath is controlled according to the ratio Ψ 1 of the iron scale Flow F.
Further, this method also includes：The unit plane on the surface of the strip is detected in the exit of the descaling bath The ratio Ψ 2 of iron scale in product；The ratio Ψ 1 of the iron scale is repaiied according to the ratio Ψ 2 of the iron scale Just.
Preferably, the ratio Ψ 1 according to the iron scale controls each ball blast amount jettisoninged of the shot-blasting machine PqWith ejection velocity PvIncluding：The ball blast amount P is calculated according to equation belowq：Pq=K1+3152 Ψ 1-4080 Ψ 12+1969Ψ 13；And the ejection velocity P is calculated according to equation belowv：Pv=K2+253.7 Ψ 1-405.7 Ψ 12+209.6Ψ13, wherein, K1 and K2 is constant, and 180≤K1≤200 and 18≤K2≤22.
Preferably, it is described to be controlled the pickling flow F in descaling bath to include according to such as according to the ratio Ψ 1 of the iron scale Lower formula calculates the pickling flow F：F=K3+103.4 Ψ 1, wherein, K3 is constant, and 35≤K3≤40.
Preferably, the ratio Ψ 2 according to the iron scale is modified bag to the ratio Ψ 1 of the iron scale Include：Correction factor is calculated according to equation below：E=K4+0.5938 Ψ 2-0.6523 Ψ 22+0.9963Ψ23, wherein, K4 is normal Number, and 0.95≤K4≤1.05；And the ratio Ψ 1 using E Ψ 1 as the revised iron scale.
The method of the raising belt steel surface pickling quality of the present invention, uses surface defects detection technology before ball blast, pickling The situation of the iron scale of belt steel surface is detected, and ball blast, pickling process controlled in real time according to testing result Adjustment, so as to ensure the uniformity of board surface quality after pickling.
Brief description of the drawings
Fig. 1 is the structural representation of the production line of the method for the raising belt steel surface pickling quality of the application present invention；
Fig. 2 is the flow chart of the method for the raising belt steel surface pickling quality of the present invention.
Embodiment
The method of the raising belt steel surface pickling quality of the present invention is made into one with reference to the accompanying drawings and detailed description The detailed description of step, but it is not as a limitation of the invention.
Fig. 1 show the structure of the production line of the method for the raising belt steel surface pickling quality using the present invention.Strip 12 Carry out welding 2 after the uncoiling of uncoiler 1, then the annealing by continuous annealing furnace 3, after the cooling of cooling section 4, pass sequentially through First detection device 5, shot-blasting machine 6, descaling bath 7, the detection device 9 of circle shear 8 and second, finally enter coiling machine 10.Its In, the first detection device 5, shot-blasting machine 6, the detection device 9 of descaling bath 7 and second are all connected to computer 11.
Comprise the following steps with reference to the method with reference to figure 1 and Fig. 2, raising belt steel surface pickling quality of the invention：In band Steel 12 enters before shot-blasting machine 6, and the ratio of the iron scale of unit area on the surface of strip 12 is detected by the first detection device 5 Example Ψ 1；Oxygen in the unit area on the surface of the strip 12 detected according to second detection device 9 in the exit of descaling bath 7 Change the ratio Ψ 2 of iron sheet, the ratio Ψ 1 of iron scale is modified；Shot-blasting machine 6 is controlled according to the ratio Ψ 1 of iron scale The ball blast amount P to jettisoningqWith ejection velocity Pv；Pickling flow F in descaling bath 7 is controlled according to the ratio Ψ 1 of iron scale.
Specifically, the first detection device 5 can include the camera for being separately positioned on the upper and lower of strip 12, for real-time Obtain the image of the upper and lower surface of strip 12.In order to comprehensively, equably be examined to the surface quality of the upper and lower surface of strip 12 Survey, the collection that multiple cameras carry out image can be evenly arranged in the length and width direction of strip 12；Each width is gathered Image calculate the ratio Ψ 1, i of iron scale, then to the ratio Ψ 1 of all iron scales, i carries out statistical average and obtains band The ratio Ψ 1 of the iron scale of unit area on the surface of steel 12.The strip 12 on production line is carried out by multigroup camera Continuous scanning, so as to realize the detection of the total length to strip 12, all positon surface state on wide, the upper and lower surface of full plate.
The position and density of camera and the frequency of collection image should be able to ensure each part to strip 12 All cover.
The defects of due to 12 surface of strip, is different, therefore the intensity of the surface reflection line of strip 12 can be because of the table of strip 12 The state in face changes.With light source illumination bands steel 12, camera gathers the image after the reflection source of strip 12, according to image In each pixel gray value, detect the ratio Ψ of iron scale in the unit area of strip 12 in the image of each width collection 1,i。
Above-mentioned detection process can be completed by computer 11.
Shot-blasting machine 6 conveys for ball blast and removes the iron scale of belt steel surface.Generally in the upper of strip 12 in shot-blasting machine 6 Lower surface respectively have it is multiple jettisoning, each jettisoning can be with independent control.The machine of ball blast 6 is controlled according to the ratio Ψ 1 of iron scale Each ball blast amount P to jettisoningqWith ejection velocity PvSpecifically include：The ball blast amount P is calculated according to equation belowq：Pq=K1+ 3152Ψ1-4080Ψ12+1969Ψ13；And the ejection velocity P is calculated according to equation belowv：Pv=K2+253.7 Ψ 1- 405.7Ψ12+209.6Ψ13, wherein, K1 and K2 are constant, and 180≤K1≤200 and 18≤K2≤22.
Descaling bath 7 is used for the iron scale for cleaning the surface of strip 12.Pickling temperature, acid strength in descaling bath 7 is only The static parameter related to the steel grade of strip 12, and pickling flow F is and the iron scale ratio on the surface of strip 12 detected Dynamic variable related Ψ 1.The pickling flow F in descaling bath 7 is controlled to include according to following public according to the ratio Ψ 1 of iron scale Formula calculates the pickling flow F：F=K3+103.4 Ψ 1, wherein, K3 is constant, and 35≤K3≤40.
It is identical with the Cleaning Principle of the first detection device 5 in the second detection device 9 that the exit of descaling bath 7 is set, use It is then right according to the ratio Ψ 2 of iron scale in the ratio Ψ 2 of the iron scale in the unit area on the surface of detection strip 12 The ratio Ψ 1 of iron scale is modified.Specifically modification method is：Correction factor is calculated according to equation below：E=K4+ 0.5938Ψ2-0.6523Ψ22+0.9963Ψ23, wherein, K4 is constant, and 0.95≤K4≤1.05；And E Ψ 1 are made For the ratio Ψ 1 of the revised iron scale.The control of ball blast and pickling is carried out with the ratio Ψ 1 of revised iron scale System, it is more conducive to improve the surface quality of strip 12.
The method of the raising belt steel surface pickling quality of the present invention, uses surface defects detection technology before ball blast, pickling The situation of the iron scale of belt steel surface is detected, and ball blast, pickling process controlled in real time according to testing result Adjustment, so as to ensure the uniformity of board surface quality after pickling.
Above embodiment is only the illustrative embodiments of the present invention, it is impossible to be used in limits the present invention, the present invention Protection domain be defined by the claims.Those skilled in the art can be in the essence and protection domain of the present invention, to this Various modifications or equivalent substitution are made in invention, and these modifications or equivalent substitution also should be regarded as being within the scope of the present invention.

Claims (5)

  1. A kind of 1. method for improving belt steel surface pickling quality, it is characterised in that including：
    The ratio Ψ 1 of iron scale in the unit area on the surface for detecting the strip before the strip enters shot-blasting machine；
    The ball blast amount P to jettisoning of the shot-blasting machine is controlled according to the ratio Ψ 1 of the iron scaleqWith ejection velocity Pv；
    Pickling flow F in descaling bath is controlled according to the ratio Ψ 1 of the iron scale.
  2. 2. the method according to claim 1 for improving belt steel surface pickling quality, it is characterised in that also include：
    The ratio Ψ 2 of iron scale in the unit area on the surface of the strip is detected in the exit of the descaling bath；
    The ratio Ψ 1 of the iron scale is modified according to the ratio Ψ 2 of the iron scale.
  3. 3. the method according to claim 1 for improving belt steel surface pickling quality, it is characterised in that described according to the oxygen The ratio Ψ 1 for changing iron sheet controls each ball blast amount P to jettisoning of the shot-blasting machineqWith ejection velocity PvIncluding：
    The ball blast amount P is calculated according to equation belowq：
    Pq=K1+3152 Ψ 1-4080 Ψ 12+1969Ψ13；And
    The ejection velocity P is calculated according to equation belowv：
    Pv=K2+253.7 Ψ 1-405.7 Ψ 12+209.6Ψ13,
    Wherein, K1 and K2 is constant, and 180≤K1≤200 and 18≤K2≤22.
  4. 4. the method according to claim 1 for improving belt steel surface pickling quality, it is characterised in that described according to the oxygen The ratio Ψ 1 for changing iron sheet controls the pickling flow F in descaling bath to include calculating the pickling flow F according to equation below：
    F=K3+103.4 Ψ 1,
    Wherein, K3 is constant, and 35≤K3≤40.
  5. 5. the method according to claim 2 for improving belt steel surface pickling quality, it is characterised in that described according to the oxygen Change iron sheet ratio Ψ 2 the ratio Ψ 1 of the iron scale is modified including：
    Correction factor is calculated according to equation below：
    E=K4+0.5938 Ψ 2-0.6523 Ψ 22+0.9963Ψ23,
    Wherein, K4 is constant, and 0.95≤K4≤1.05；And
    Ratio Ψ 1 using E Ψ 1 as the revised iron scale.
CN201610481433.2A 2016-06-27 2016-06-27 The method for improving belt steel surface pickling quality Active CN107541737B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108342741A (en) * 2018-03-26 2018-07-31 郑玉祥 A kind of method for surface treating copper foil
CN111992589A (en) * 2019-05-27 2020-11-27 宝山钢铁股份有限公司 BMD production line speed control method based on strip steel surface brightness detection
CN112126938A (en) * 2020-08-31 2020-12-25 首钢智新迁安电磁材料有限公司 Method and device for controlling surface quality of strip steel
CN113670941A (en) * 2021-08-30 2021-11-19 宝钢湛江钢铁有限公司 Method for online quantitative evaluation of oxidation color defects on surface of multifunctional continuous annealing strip steel

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Publication number Priority date Publication date Assignee Title
CN102126185A (en) * 2010-09-29 2011-07-20 杭州九龙厨具制造有限公司 Shot peening process for removing scale on surface of steel belt
CN102286751A (en) * 2011-06-04 2011-12-21 首钢总公司 Method for judging pickling speed in cold rolling pickling technology
CN102400156A (en) * 2010-09-19 2012-04-04 天津市亿博制钢有限公司 Acid-washing method of hot-rolled coiled plate
CN104451723A (en) * 2014-10-16 2015-03-25 武汉钢铁(集团)公司 Method for improving acid washing efficiency and quality of hot rolled strip steel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102400156A (en) * 2010-09-19 2012-04-04 天津市亿博制钢有限公司 Acid-washing method of hot-rolled coiled plate
CN102126185A (en) * 2010-09-29 2011-07-20 杭州九龙厨具制造有限公司 Shot peening process for removing scale on surface of steel belt
CN102286751A (en) * 2011-06-04 2011-12-21 首钢总公司 Method for judging pickling speed in cold rolling pickling technology
CN104451723A (en) * 2014-10-16 2015-03-25 武汉钢铁(集团)公司 Method for improving acid washing efficiency and quality of hot rolled strip steel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108342741A (en) * 2018-03-26 2018-07-31 郑玉祥 A kind of method for surface treating copper foil
CN111992589A (en) * 2019-05-27 2020-11-27 宝山钢铁股份有限公司 BMD production line speed control method based on strip steel surface brightness detection
CN112126938A (en) * 2020-08-31 2020-12-25 首钢智新迁安电磁材料有限公司 Method and device for controlling surface quality of strip steel
CN112126938B (en) * 2020-08-31 2023-01-10 首钢智新迁安电磁材料有限公司 Method and device for controlling surface quality of strip steel
CN113670941A (en) * 2021-08-30 2021-11-19 宝钢湛江钢铁有限公司 Method for online quantitative evaluation of oxidation color defects on surface of multifunctional continuous annealing strip steel

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