CN103920725A - High-surface-quality low-surface-residue pickling technique - Google Patents
High-surface-quality low-surface-residue pickling technique Download PDFInfo
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- CN103920725A CN103920725A CN201410118377.7A CN201410118377A CN103920725A CN 103920725 A CN103920725 A CN 103920725A CN 201410118377 A CN201410118377 A CN 201410118377A CN 103920725 A CN103920725 A CN 103920725A
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Abstract
The invention relates to a high-surface-quality low-surface-residue pickling technique. The technique specifically includes the following steps: uncoiling via an uncoiler; breaking and stripping oxides on the surface of strip steel via a withdrawal and straightening unit; subjecting the strip steel to pickling; feeding the strip steel subjected to pickling into a mechanical grinding device for mechanical surface grinding; feeding the ground strip steel into a mechanical surface residue removing device for removing surface residues; then feeding the strip steel into a finishing machine for surface roughness uniformization finishing treatment; recoiling via a recoiler. Through the technique, the surface of the strip steel is subjected to mechanical surface grinding repair via the mechanical grinding device, so that surface quality of the strip steel is high; the mechanical surface residue removing device is adopted to remove surface residues of acid liquor, so that corrosion resistance of the strip steel is enhanced; with the aid of the mechanical surface residue removing device, rinsing at normal temperature is realized, and production consumption is lowered; the strip steel is low in temperature when entering a leveler, and profile quality of a final product is guaranteed beneficially.
Description
Technical field
The invention belongs to the flat material deep process technology of ordinary hot draw down field, particularly relate to the residual pickling process of the low plate face of a kind of great surface quality.
Background technology
In hot-strip production process, band steel top layer Fe atom can react with airborne oxygen, produce oxide iron sheet, existing technology, adopt acid cleaning process to carry out surface treatment to hot-strip, remove oxide on surface, the hot-strip after pickling can directly use also can become cold-rolled products after cold rolling.
As shown in Figure 1, Figure 2 and Figure 3, in the ideal situation, with the oxide on steel 7 surfaces, the oxide from top layer to nexine is respectively Fe
2o
331, Fe
3o
432, FeO 33, the complexity of above-mentioned three kinds of oxides and acid reaction is different, is positioned at undermost FeO 33 and the most easily reacts with pickling, in this state, acid solution and oxide and with the reaction time of steel 7 bodies basic identical, after pickling, be with steel 7 surface quality even; But, in actual production, part Fe
3o
432 can be deposited on band steel 7 surfaces, due to Fe
3o
432 is different with the reaction time of acid solution from FeO 33, thereby cause acid solution and inhomogeneous reaction with between steel 7, cause can not meet the instructions for use of most products with steel 7 surface quality after pickling.
On the other hand, band steel is after overpickling, and it is residual that surface has acid solution, and, the band steel that surface quality is poorer, surperficial acid solution residual quantity is larger.These residual chlorions meeting heavy corrosion belt steel surfaces, make belt steel surface be yellow or yellow green mottling, and are not so good as normal band steel 7 lights after these band steel 7 rollings, and corrosion again also easily occurs finished product.
Residual for reducing acid solution, adopt traditionally multistage rinse method cleaning tape steel, and constantly promote rinsing temperature in rinse cycle, increase the kinetic energy of molecule in potcher, the diffusion of acceleration acid solution, the rinsing temperature of general final rinse is 85 ° of C left and right, has additionally increased the energy consumption of production process.Nonetheless,, from practical condition, in final rinse groove, acid strength is still at 100mg/l-150mg/l.
Summary of the invention
In view of this, main purpose of the present invention is to provide the low plate face of a kind of great surface quality residual pickling process, pass through the technical program, the present invention adopts mechanical lapping equipment to carry out mechanical surface to belt steel surface and grinds reparation, eliminate aberration and blemish after pickling, promote surface quality, simultaneously, residual for reducing the acid solution of product surface, configure mechanical plate face residue removal device at rinsing rear portion, band steel is carried out to the cleaning of mechanical surface residue, to remove the residue at belt steel surface convex-concave place.
In order to achieve the above object, technical scheme of the present invention is achieved in that the residual pickling process of the low plate face of a kind of great surface quality, specifically comprises the steps:
A. uncoiler uncoiling;
B. withdrawal straightening machine carries out fragmentation, peels off the oxide of belt steel surface;
C. band steel is carried out to pickling, rinsing;
D. the band steel through overpickling is entered into mechanical lapping equipment and carry out mechanical surface grinding reparation blemish;
E. the band steel that grinding is repaired through mechanical surface is entered into mechanical plate face residue removal device and carry out the cleaning of mechanical surface residue;
F. carry out the processing of even surface roughness polishing to entering polishing machine through the band steel of above-mentioned processing;
G. band steel after treatment is batched and becomes finished product through coiling machine.
In the present invention, the residual pickling process of plate face, this process is straightening technique, acid cleaning process, rinsing process, mechanical surface grinding technics, mechanical surface residue cleaning technology and the group technology of controlling the finishing process of roughness; Unit is made up of uncoiler, entry loop, withdrawal straightening machine, pickling, rinsing, mechanical lapping equipment, mechanical plate face residue removal device, outlet looping, polishing machine and coiling machine.After processing uncoiler, dispose withdrawal straightening machine and carry out the broken phosphorus of straightening, treated band steel enters acid tank and carries out pickling processing, again the band steel after pickling is entered into mechanical lapping equipment and carry out mechanical surface grinding, then enter into mechanical plate face residue removal device and carry out the cleaning of mechanical surface residue, finally more above-mentioned band steel is entered into polishing machine and carry out even surface roughnessization and process polishing processing.
In the technical scheme of invention, comprise that straightening break that phosphorus, pickling dephosphorization, mechanical surface grind, mechanical surface residue is cleared up and surface finishing treatment process, make strip surface quality be better than the smooth product of common pickling.
In technical scheme of the present invention, carbon steel product introduction through overpickling is carried out to mechanical surface milled processed to mechanical lapping equipment, after one-level or two-stage or three grades of mechanical surface milled processed, can obtain the hot rolling acid-cleaning product of different surface roughness.
The present invention has the good feature of the final products surface low corrosion resistance of acid solution residual quantity, and described mechanical plate face residue removal device is arranged on before final rinse groove, to remove the residual thing of belt steel surface.
The present invention has the energy of production and consumes low function, before final rinse groove, adopt mechanical plate face residue removal device to remove the residual thing of belt steel surface, cancel potcher in traditional handicraft and heated step by step, and the energy consumption that requires final rinse temperature to cause lower than 80 degree.
The present invention has the few little feature of ambient influnence of acid solution evaporation capacity, and this process adopts normal temperature rinsing, has reduced the evaporation capacity of chlorion in rinsing liquid.
The present invention has the excellent feature of product strip shape quality, and this process adopts normal temperature rinsing, ensures to enter polishing machine with steel with the temperature of≤40 ° of C, has avoided smooth the caused plate shape infringement of high temperature and distortion.
The present invention has normal temperature and batches the function that extends the reel life-span, and this process adopts normal temperature rinsing, and band steel enters coiling machine with room temperature, the improper damage of seal in reel while having avoided high temperature coiling.
Adopt the beneficial effect after technique scheme to be: the residual pickling process of the low plate face of a kind of great surface quality, by the technical program, 1 adopts mechanical lapping equipment to carry out mechanical surface to belt steel surface grinds reparation, and product surface quality is excellent; 2 adopt mechanical plate face residue removal device clear board face acid solution residual, improving product corrosion resistance; 3 realize normal temperature rinsing by mechanical type plate face device for cleaning residues, have reduced to produce to consume; When 4 band steel enter planisher, temperature is low, is conducive to ensure the strip shape quality of final products.
Brief description of the drawings
Fig. 1 is the desirable oxide structure picture of belt steel surface.
Fig. 2 is the oxide structure picture of belt steel surface reality.
Fig. 3 is the strip surface quality picture after prior art pickling.
Fig. 4 is process equipment layout drawing of the present invention.
Mechanical lapping equipment structural representation in Fig. 5 the present invention.
Mechanical plate face residue removal apparatus structure schematic diagram in Fig. 6 the present invention.
In figure, 1 uncoiler, 2 entry loops, 3 withdrawal straightening machines, 4 pickling, 5 outlet loopings, 6 coiling machines, 7 band steel, 17 mechanical lapping equipments, 18 backing rolls, 19 mixing rolls, 20 mechanical plate face residue removal devices, 21 rinsings, 22 polishing machines, 30 rinsings, 31 Fe
2o
3, 32 Fe
3o
4, 33 FeO.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment in the present invention is described in further detail.
As shown in Figure 4, Figure 5 and Figure 6, the present invention relates to. the residual pickling process of the low plate face of a kind of great surface quality, specifically comprises the steps:
A. uncoiler 1 uncoiling;
B. withdrawal straightening machine 3 carries out fragmentation, peels off the oxide 8 with steel 7 surfaces;
C. band steel 7 is carried out to pickling 4, rinsing 30;
D. the band steel through overpickling 4 is entered into mechanical lapping equipment 17 and carry out mechanical surface grinding reparation blemish;
E. carry out the cleaning of mechanical surface residue to enter into mechanical plate face residue removal device 20 through the band steel of overpickling 4 and rinsing 30;
F. carry out the processing of even surface roughness polishing to entering polishing machine 22 through the band steel 7 of above-mentioned processing;
G. band steel 7 after treatment is batched and becomes finished product through coiling machine 6.
This process is straightening technique, acid cleaning process, rinsing process, the group technology of the finishing process of mechanical surface renovation technique and control roughness, pickling unit is by uncoiler 1, entry loop 2, withdrawal straightening machine 3, pickling 4, rinsing 30, mechanical lapping equipment 17, machinery plate face residue removal device 20, outlet looping 5, polishing machine 22 and coiling machine 6 form, after processing uncoiler 1, dispose withdrawal straightening machine 3 and carry out the broken phosphorus of straightening, treated band steel 7 enters acid tank to carry out pickling 4 and processes, again the band steel after pickling 4 is entered into mechanical lapping equipment 17 and carry out mechanical surface grinding, then enter into mechanical plate face residue removal device 20 and carry out the cleaning of mechanical surface residue, finally more above-mentioned band steel 7 is entered into polishing machine 22 and carry out the processing of even surface roughnessization processing polishing.
In technical scheme of the present invention, comprise that straightening breaks that phosphorus, pickling dephosphorization, mechanical surface grind, the cleaning of mechanical surface residue and surface finishing treatment process, make to be with steel 7 surface quality to be better than the smooth product of common pickling.
In technical scheme of the present invention, carbon steel product introduction through overpickling 4 is carried out to mechanical surface milled processed to mechanical lapping equipment 17, after one-level or two-stage or three grades of mechanical surface milled processed, can obtain hot rolling acid-cleaning 4 products of different surface roughness.
The present invention has the good feature of the final products surface low corrosion resistance of acid solution residual quantity, and described mechanical plate face residue removal device 20 is arranged on before final rinse 30 grooves, removes the residue of belt steel surface.
The present invention has the energy of production and consumes low function, before final rinse 30 grooves, the residue that adopts mechanical plate face residue removal device 20 to remove with steel 7 surfaces, has cancelled rinsing 30 grooves in traditional handicraft and has heated step by step, and the energy consumption that requires final rinse 30 temperature to cause lower than 80 degree.
The present invention has the few little feature of ambient influnence of acid solution evaporation capacity, and this process adopts normal temperature rinsing 30, has reduced the evaporation capacity of chlorion in rinsing 30 liquid.
The present invention has the excellent feature of product strip shape quality, and this process adopts normal temperature rinsing 30, ensures to enter polishing machine 22 with steel 7 with the temperature of≤40 ° of C, has avoided smooth the caused plate shape infringement of high temperature and distortion.
The present invention has normal temperature and batches the function that extends the reel life-span, and this process adopts normal temperature rinsing 30, and band steel 7 enters coiling machine 6 with room temperature, the improper damage of seal in reel while having avoided high temperature coiling.
The present invention at work, band steel 7 out enters into afterwards one-level rinsing 30 grooves from pickling 4 grooves, one-level rinsing 30 grooves adopt high-pressure wash method to remove the acid solution with steel 7 surfaces, band steel 7 enters into mechanical lapping equipment 17 from one-level rinsing 30 grooves out, mechanical lapping equipment 17 adopts with the mixing roll 19 of the abrasive material of AlO band steel 7 is carried out to surface treatment, and on mixing roll 19, the granularity of subsidiary abrasive material determines the roughness with steel 7 surfaces.
In the present invention, the mechanical lapping equipment 17 of mechanical surface mill grinding process is in the time of cleaning band steel 7 upper surface, first mixing roll 19 is configured in top, below is backing roll 18, second top is backing roll 18, below is mixing roll 19, two backing rolls 18 and two mixing rolls 19 are one group, can be according to the requirement of finished strip 7 surface quality, configure more than one group mixing roll 19 and backing roll 18, described mixing roll 19 is being with the surperficial High Rotation Speed of steel 7 with the linear velocity of 1000m/min-3000m/min, mixing roll 19 rub and the acting in conjunction of abrasive lapping under, tiny flaw and the aberration of removing with steel 7 surfaces.
Tradition pickling unit, adopts high-temperature rinsing technique, reduce the residual acid of plate face, but effect is unsatisfactory in actual applications by increasing molecular kinetic energy.
The mechanical plate face residue removal device 20 of mechanical surface residue cleaning technology in the present invention, by residual the plate face after pickling 4 below 20% of traditional pickling 4 techniques that is reduced to, band steel 7 is through two, after three grades of rinsings 30, enter in the mechanical plate face residue removal device 20 of mechanical surface residue cleaning technology, when cleaning band steel 7 upper surface, first brush roll 21 is configured in top, below is backing roll, second top is backing roll 18, below is brush roll 21, two backing rolls 18 and two brush roll 21 are one group, complete the mechanical surface residue cleaning of a upper and lower surface, bristle in described brush roll 21 is very thin, the head of very thin bristle when processing in brush roll 21 can stretch into the pit with steel 7 surfaces, residual acid in pit and other impurity are brushed out, simultaneously, can also carry out polishing to band steel 7 surfaces, improve the brightness of product surface.
The above, be only better possible embodiments of the present invention, not in order to limit protection scope of the present invention.
Claims (9)
1. the residual pickling process of the low plate face of great surface quality, is characterized in that, specifically comprises the steps:
A. uncoiler uncoiling;
B. withdrawal straightening machine carries out fragmentation, peels off the oxide of belt steel surface;
C. band steel is carried out to pickling, rinsing;
D. the band steel through overpickling is entered into mechanical lapping equipment and carry out mechanical surface milled processed, repair blemish;
E. the band steel that grinding is repaired through mechanical surface is entered into mechanical plate face residue removal device and carry out the cleaning of mechanical surface residue;
F. carry out the processing of even surface roughness polishing to entering polishing machine through the band steel of above-mentioned processing;
G. band steel after treatment is batched and becomes finished product through coiling machine.
2. the residual pickling process of the low plate face of a kind of great surface quality according to claim 1, it is characterized in that, this process is straightening technique, acid cleaning process, rinsing process, mechanical surface grinding renovation technique, mechanical surface residue cleaning technology and the group technology of controlling roughness finishing process; Unit is made up of uncoiler, entry loop, withdrawal straightening machine, pickling, rinsing, mechanical lapping equipment, mechanical plate face residue removal device, outlet looping, polishing machine and coiling machine; After processing uncoiler, dispose withdrawal straightening machine and carry out the broken phosphorus of straightening, treated band steel enters acid tank and carries out pickling processing, again the band steel after pickling is entered into mechanical lapping equipment and carry out mechanical surface grinding, then enter into mechanical plate face residue removal device and carry out the cleaning of mechanical surface residue, finally more above-mentioned band steel is entered into polishing machine and carry out even surface roughnessization and process polishing processing.
3. the residual pickling process of the low plate face of a kind of great surface quality according to claim 2, it is characterized in that, comprise that straightening breaks that phosphorus, pickling dephosphorization, mechanical surface grind, the cleaning of mechanical surface residue and surface finishing treatment process, make strip surface quality and corrosion resistance all be better than the smooth product of common pickling.
4. the residual pickling process of the low plate face of a kind of great surface quality according to claim 3, it is characterized in that, carbon steel product introduction through overpickling is carried out to mechanical surface milled processed to mechanical lapping equipment, after one-level or two-stage or three grades of mechanical surface milled processed, can obtain the hot rolling acid-cleaning product of different surface roughness.
5. the residual pickling process of the low plate face of a kind of great surface quality according to claim 2, it is characterized in that thering is final products surface acid solution residual quantity low, the feature that corrosion resistance is good, described mechanical plate face residue removal device is arranged on before final rinse groove, removes the residue of belt steel surface.
6. the residual pickling process of the low plate face of a kind of great surface quality according to claim 5, it is characterized in that, there is the energy of production and consume low function, before final rinse groove, adopt mechanical plate face residue removal device to remove the residual thing of belt steel surface, cancel potcher in traditional handicraft and heated step by step, and the energy consumption that requires final rinse temperature to cause lower than 80 degree.
7. the residual pickling process of the low plate face of a kind of great surface quality according to claim 6, is characterized in that, has the few little feature of ambient influnence of acid solution evaporation capacity, and this process adopts normal temperature rinsing, has reduced the evaporation capacity of chlorion in rinsing liquid.
8. the residual pickling process of the low plate face of a kind of great surface quality according to claim 6, it is characterized in that, there is the excellent feature of product strip shape quality, this process adopts normal temperature rinsing, guarantee enters polishing machine with steel with the temperature of≤40 ° of C, has avoided smooth the caused plate shape infringement of high temperature and distortion.
9. the residual pickling process of the low plate face of a kind of great surface quality according to claim 6, it is characterized in that, there is normal temperature and batch the function that extends the reel life-span, this process adopts normal temperature rinsing, band steel enters coiling machine with room temperature, the improper damage of seal in reel while having avoided high temperature coiling.
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| CN201410118377.7A CN103920725B (en) | 2014-03-27 | 2014-03-27 | A kind of low plate face of great surface quality remains pickling process |
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| CN201410118377.7A CN103920725B (en) | 2014-03-27 | 2014-03-27 | A kind of low plate face of great surface quality remains pickling process |
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| CN103920725A true CN103920725A (en) | 2014-07-16 |
| CN103920725B CN103920725B (en) | 2016-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111331435A (en) * | 2020-03-27 | 2020-06-26 | 中冶赛迪工程技术股份有限公司 | Intelligent surface grinding process and production line for alloy medium plate |
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| JP2000210709A (en) * | 1999-01-26 | 2000-08-02 | Nisshin Steel Co Ltd | Method for descaling hot rolled steel strip |
| CN102719831A (en) * | 2012-05-29 | 2012-10-10 | 中冶南方工程技术有限公司 | Method for removing scales on surface of hot-rolled stainless steel strip |
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| CN103419113A (en) * | 2012-05-25 | 2013-12-04 | 宝山钢铁股份有限公司 | Novel metal plate strip surface cleaning method and device |
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2014
- 2014-03-27 CN CN201410118377.7A patent/CN103920725B/en active Active
Patent Citations (5)
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| JPH01273607A (en) * | 1988-04-25 | 1989-11-01 | Nisshin Steel Co Ltd | Method and device for processing hot rolled alloy steel strip |
| JP2000210709A (en) * | 1999-01-26 | 2000-08-02 | Nisshin Steel Co Ltd | Method for descaling hot rolled steel strip |
| CN103419113A (en) * | 2012-05-25 | 2013-12-04 | 宝山钢铁股份有限公司 | Novel metal plate strip surface cleaning method and device |
| CN102719831A (en) * | 2012-05-29 | 2012-10-10 | 中冶南方工程技术有限公司 | Method for removing scales on surface of hot-rolled stainless steel strip |
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Non-Patent Citations (1)
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| 马丽坤等: "国产化带平整机的连续酸洗机组设备组成及特点", 《冶金设备》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111331435A (en) * | 2020-03-27 | 2020-06-26 | 中冶赛迪工程技术股份有限公司 | Intelligent surface grinding process and production line for alloy medium plate |
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| CN103920725B (en) | 2016-03-30 |
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