CN102994934B - Method for continuously hot-dipping zinc on strip steel to prevent strip breakage in roll change - Google Patents
Method for continuously hot-dipping zinc on strip steel to prevent strip breakage in roll change Download PDFInfo
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- CN102994934B CN102994934B CN201210579948.8A CN201210579948A CN102994934B CN 102994934 B CN102994934 B CN 102994934B CN 201210579948 A CN201210579948 A CN 201210579948A CN 102994934 B CN102994934 B CN 102994934B
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Abstract
The invention discloses a method for continuously hot-dipping zinc on strip steel to prevent strip breakage in roll change, relates to the field of cold-rolled strip steel production, and provides a method for continuously hot-dipping zinc on the strip steel to prevent strip breakage in roll change, which can reduce the production of waste products and non-standard products. The method comprises the following steps of: (a) after a sinking roll system is lifted out of a zinc pot, lifting a furnace nose, tightening the strip steel and enabling the whole strip steel to be positioned on zinc liquid level; (b) pulling out the unplated part of the strip steel from the furnace nose; (c) arranging an isolating device between the unplated part and the zinc liquid level; (d) cutting off the plated part of the strip steel; (e) connecting a corrosion-resistant belt and the unplated part; (f) pulling the whole unplated part back to the furnace nose, and removing the isolating device; and (g) installing the sinking roll system. The method disclosed by the invention can be applied in replacing the sinking roll in the production of continuously hot-dipping zinc on strip steel.
Description
Technical field
The present invention relates to cold rolled strip steel production field, relate in particular to a kind of method of broken belt while preventing roll change with steel continuous hot-dipping galvanizing.
Background technology
Hot dip process technology is that a kind of material that will plate (as iron and steel or other alloy) immerses in the coated metal liquid of fusing, after contacting for some time with molten metal, the metallic surface of maintenance matrix takes out, make it to adhere to one deck uniformly, any surface finish, with the technology of the coated metal of matrix mortise.Hot dip process technology is a kind of for a long time generally for the surface treatment method of metal products.Band steel continuous hot-dipping galvanizing (aluminium zinc) be band steel through cleaning by degreasing, continuous annealing and cooling after under protective atmosphere, enter zinc pot by stove nose; realize turning to by the sinking roll system in zinc pot and leave zinc pot; belt steel surface is blown away after unnecessary zinc liquid cooling through cool wind box by air knife, finally form the uniform coating of one deck at belt steel surface.
During continuous hot galvanizing is produced, change direction with steel by the sinking roller that immerses zinc pot, and sinking roller there is certain life cycle, use after certain hour, because following reason needs to change: 1, sinking roller group surface cord affects quality product; 2, band steel specification need be broadened by narrow; 3, bearing shell, axle sleeve life cycle finish.
Change sinking roller group and in fact comprise two groundworks: 1, sinking roller group is hung out to zinc pot; 2, new sinking roller is assembled into zinc pot.Conventionally completing a complete sinking roller group replacing time needs 1-2 hour.In replacing sinking roller group process, unit cannot move, if band steel rests in zinc pot for a long time, there will be corrosion reaction between steel plate and zinc liquid to occur that steel plate dissolves in zinc liquid, and long words of time there will be dissolves i.e. common " broken belt " said completely.Evidence, the straight carbon steel of 0.5mm is immersed in 600 DEG C of aluminium zinc liquid about 15 minutes and just there will be intensive corrosion cavity, can be with steel fracture about 30 minutes at zinc liquid level place.
Therefore when, being easy to occur band steel broken belt, especially aluminium zinc plating solution or producing thin specification steel band in replacing sinking roller group process.Existing control broken belt method is in the replacing professional etiquette lattice transition of advancing, and meets and changes the requirement of sinking roller group to extend the anticorrosive time by unit in the thick steel band arrangement of specification; And shortening packs the time of sinking roller group into and packs the rear unit starting time into as far as possible.Adopt this method often can produce a lot of non-target products; And need specification to transit back goal standard having changed after sinking roller group, cause great waste; Shorten pack the time of sinking roller group into and pack into the rear unit starting time also the equipment state to unit and operator's technical ability require high.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of can reduce that waste product and nonstandard product produce prevent roll change with steel continuous hot-dipping galvanizing time broken belt method.
For the technical scheme that addresses the above problem employing is: while preventing roll change with steel galvanizing, the method for broken belt comprises the steps:
A, sinking roll system hang out after zinc pot, lift stove nose, and belt tensioner steel makes to be with steel to be all positioned at zinc liquid level top;
B, from stove nose the not plating part of pull-out with steel;
C, do not plate part and zinc liquid level between disrupter is set;
D, clip the plating part with steel;
E, anti-corrosion band is connected with plating part not;
F, will not plate part and all retract stove nose, remove disrupter;
G, installation sinking roll system.
Concrete: anti-corrosion band is Stainless Steel Band.
Concrete: anti-corrosion band is titanium band.
Concrete: anti-corrosion band and the welding of not plating part.
Concrete: anti-corrosion band and the riveted joint of not plating part.
The invention has the beneficial effects as follows: anti-corrosion band is not for zinc (aluminium zinc) chemical reaction or react slower metal strip, replace after anti-corrosion band, anti-corrosion band can be resisted zinc (aluminium zinc) corrosion the long period, what for example 0.5mm was thick 2 is stainless steel anti-corrosion time in 600 DEG C of zinc aluminum pots can exceed 4 hours, and condition of equivalent thickness 3 is that stainless steel can exceed 12 hours.Carry out transition without changing large gauge strips steel like this, greatly reduced the rejection number producing in recovery process after shutting down.
Brief description of the drawings
Fig. 1 is the normal production status schematic diagram of band steel continuous hot-dipping galvanizing;
Fig. 2 is step a schematic diagram;
Fig. 3 is step b schematic diagram;
Fig. 4 is step c schematic diagram;
Fig. 5 is steps d, e schematic diagram;
Fig. 6 is step f schematic diagram;
Fig. 7 is step g schematic diagram;
In figure, be labeled as: stove nose 1, do not plate part 2, band steel 3, plated part 4, sinking roll system 5, zinc pot 6, zinc liquid level 7, disrupter 8, be anti-corrosionly with 9.
Embodiment
Below in conjunction with the drawings and specific embodiments, invention is further illustrated.
For provide a kind of can reduce that waste product and nonstandard product produce prevent roll change with steel continuous hot-dipping galvanizing time broken belt method.As shown in Figures 2 to 7, while preventing roll change with steel continuous hot-dipping galvanizing, the method for broken belt comprises the steps: that a, sinking roll system 5 hang out after zinc pot 6, lifts stove nose 1, and belt tensioner steel 3 makes to be with steel 3 to be all positioned at zinc liquid level 7 tops; B, from stove nose 1 the not plating part 2 of pull-out with steel 3; C, disrupter 8 is set not plating between part 2 and zinc liquid level 7; D, clip the plating part 4 with steel 3; E, by anti-corrosion be with 9 with do not plate part 2 and be connected; F, will not plate part 2 and all retract stove nose 1, remove disrupter 8; G, installation sinking roll system 5, resume production.Anti-corrosionly be not with zinc (aluminium zinc) chemical reaction or react slower metal strip with 9, replace after anti-corrosion band, because corrosion-resistant material can be resisted zinc (aluminium zinc) corrosion the long period, what for example 0.5mm was thick 2 is stainless steel anti-corrosion time in 600 DEG C of zinc aluminum pots can exceed 4 hours, and condition of equivalent thickness 3 is that stainless steel can exceed 12 hours.Without steel band is carried out to transition, greatly reduce the rejection number producing in recovery process after shutting down like this.
Anti-corrosionly as previously mentioned be not with zinc (aluminium zinc) chemical reaction or react slower metal strip with 9, the present invention is preferably anti-corrosion is with 9 for Stainless Steel Band or titanium band.On Stainless Steel Band or titanium band market, all there is sale, obtain easily, and anti-breaking effective.
Anti-corrosion be with 9 with do not plate part 2 and have and can be connected in many ways, optimal way of the present invention is: anti-corrosion be with 9 with do not plate part 2 and weld or rivet.Welding or riveted joint have technique simple, connect reliable advantage.
Claims (3)
1. while preventing roll change with steel continuous hot-dipping galvanizing, the method for broken belt, is characterized in that comprising the steps:
A, sinking roll system (5) hang out after zinc pot (6), lift stove nose (1), and belt tensioner steel (3) makes to be with steel (3) to be all positioned at zinc liquid level (7) top;
B, from stove nose (1) the not plating part (2) of pull-out band steel (3);
C, disrupter (8) is set not plating between part (2) and zinc liquid level (7);
D, clip band steel (3) plating part (4);
E, anti-corrosion band (9) is connected with plating part (2) not, anti-corrosion band (9) is Stainless Steel Band or titanium band;
F, will not plate part (2) all retract stove nose (1), remove disrupter (8);
G, installation sinking roll system (5).
2. the method for broken belt while preventing roll change with steel continuous hot-dipping galvanizing according to claim 1, is characterized in that: described anti-corrosion band (9) and plating part (2) welding.
3. the method for broken belt while preventing roll change with steel continuous hot-dipping galvanizing according to claim 1, is characterized in that: described anti-corrosion band (9) and plating part (2) riveted joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579948.8A CN102994934B (en) | 2012-12-27 | 2012-12-27 | Method for continuously hot-dipping zinc on strip steel to prevent strip breakage in roll change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579948.8A CN102994934B (en) | 2012-12-27 | 2012-12-27 | Method for continuously hot-dipping zinc on strip steel to prevent strip breakage in roll change |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102994934A CN102994934A (en) | 2013-03-27 |
| CN102994934B true CN102994934B (en) | 2014-07-16 |
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| CN201210579948.8A Expired - Fee Related CN102994934B (en) | 2012-12-27 | 2012-12-27 | Method for continuously hot-dipping zinc on strip steel to prevent strip breakage in roll change |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108676996B (en) * | 2018-04-24 | 2019-08-13 | 邯郸钢铁集团有限责任公司 | A kind of strip processing method when replacement continuous annealing furnace furnace nose |
| CN110129705A (en) * | 2019-06-04 | 2019-08-16 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of continuous zinc/aluminium/aluminium zinc coating silicon unit machine control method |
| CN113817975B (en) * | 2021-08-23 | 2023-07-14 | 山东钢铁集团日照有限公司 | Method for preventing strip steel from fusing during stop of fixed zinc pot |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205598A (en) * | 2006-12-22 | 2008-06-25 | 沈阳大陆激光技术有限公司 | Dip-roll sleeve and method for manufacturing the same |
| EP1696047B1 (en) * | 2003-12-11 | 2014-02-12 | Hitachi Metals, Ltd. | Roll for molten metal plating bath |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004091831A (en) * | 2002-08-30 | 2004-03-25 | Jfe Steel Kk | Manufacturing apparatus and manufacturing method for hot dip coated metallic strip |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1696047B1 (en) * | 2003-12-11 | 2014-02-12 | Hitachi Metals, Ltd. | Roll for molten metal plating bath |
| CN101205598A (en) * | 2006-12-22 | 2008-06-25 | 沈阳大陆激光技术有限公司 | Dip-roll sleeve and method for manufacturing the same |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2004-91831A 2004.03.25 |
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Granted publication date: 20140716 Termination date: 20161227 |