CN108251776A - The method of Hand scarf stove nose zinc gray - Google Patents
The method of Hand scarf stove nose zinc gray Download PDFInfo
- Publication number
- CN108251776A CN108251776A CN201810019519.2A CN201810019519A CN108251776A CN 108251776 A CN108251776 A CN 108251776A CN 201810019519 A CN201810019519 A CN 201810019519A CN 108251776 A CN108251776 A CN 108251776A
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- Prior art keywords
- zinc
- stove nose
- gray
- nose
- annealing furnace
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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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention discloses a kind of methods of Hand scarf stove nose zinc gray, and annealing furnace is diffused Close All, and the furnace pressure for controlling annealing furnace is 1.5~2.0mbar, hydrogen volume content is 1.5~2.0% in annealing furnace；Then start to promote stove nose, after stove nose leaves zinc liquid level, start manually to carry out pulling out ash；Normal work position will be fallen on after gray moving under stove nose.This method does not need to stop line; so without using stove nose flashboard, strip will not be touched; by rationally adjusting annealing furnace furnace pressure, control nitrogen hydrogen protective gas pressure, in the case of making atmosphere of annealing furnace unaffected, so as to complete the work of zinc gray in Hand scarf stove nose.The zinc gray of zinc liquid level in online prepurging nose of the invention, realize the purification to zinc liquid level in stove nose, significantly improve the surface quality of galvanizing production, it ensure that strip steel Zn-plating technological parameter consistency, the stability of strip even zinc layer and galvanized sheet fine surface quality is improved, ensure that the smooth production of great surface quality galvanized sheet.
Description
Technical field
The invention belongs to galvanizing technique field, especially a kind of method of Hand scarf stove nose zinc gray.
Background technology
With the increase of zinc-plated manufacturer, market competition is more fierce, and zinc-plated production cost control force is increasingly shown
Go out its critical positions.Under the premise of similary product quality, low cost production becomes the necessary condition of iron and steel enterprise's existence.It is zinc-plated
Useless rate of production is largely from galvanizing surface mass defect, and in the factor for influencing galvanizing production surface quality, zinc gray is drop
The key factor of low galvanizing production surface quality.Zinc gray is the product of zinc fume condensation.The temperature of liquid zinc of zinc pot is 460 DEG C, this
At a temperature of kind, zinc pot liquid level generates zinc fume, distributes in the air of surrounding always with the volatilization of zinc；With liquid level
Oxidation, zinc pot liquid level form the film of a thin layer of zinc oxide, and the Zinc oxide film of this densification can inhibit the volatilization of zinc.This
In the zinc gray studied be zinc liquid surface volatilization inside stove nose product, zinc fume is inside stove nose continuously from zinc liquid
Face generates, and is lower ground just condensed in stove nose internal temperature, is adhered to stove nose upper and lower surface and side mostly, with
Zinc gray condenses more and more, and under the influence of the vibrations of stove nose or strip shake, zinc gray is fallen in strip upper surface, into zinc
Pot is zinc-plated, produces the surface defect of similar comet tail shape, referred to as zinc gray defect in strip upper surface in this way.
If zinc liquid temperature control is high, strip enters pot temperature height, lead to zinc gray outburst seriously, a part of zinc gray is bonded in stove
Inside nose, another part zinc gray in stove nose nitrogen and hydrogen mixture flow into hot idler roller chamber interior, be adhered to
On furnace wall and hot idler roller, it is contaminated stove.The zinc gray in stove on hot idler roller is adhered in 460 DEG C of belt steel surface liquid
Change, as strip enters, zinc pot is zinc-plated, leads to the generation of zinc layers unevenness or plating leakage defect.
Avoiding the approach that zinc gray is formed has：The formation of zinc gray in hot galvanizing process is controlled by process optimization, in hot dip
The source control zinc gray quantity of zinc；Transition volume stops line closing stove nose flashboard on galvanized wire, lifts stove nose, carries out stove nose zinc
Ash cleaning.Another way is improved in equipment aspect, is realized reduction by scrap build upgrading and is inhibited zinc gray
Generation.Once but zinc gray generation aggregation it is more, zinc gray removal difficulty will increase, not only increase galvanizing cost, can also make
Into the wasting of resources, so being badly in need of a kind of method of feasible Hand scarf stove nose zinc gray.
Invention content
The technical problem to be solved in the present invention is to provide a kind of methods of the good Hand scarf stove nose zinc gray of effect.
In order to solve the above technical problems, the technical solution used in the present invention is：Annealing furnace is diffused into Close All, is controlled
The furnace pressure of annealing furnace is 1.5~2.0mbar, hydrogen volume content is 1.5~2.0% in annealing furnace；Then start to promote stove nose
Son after stove nose leaves zinc liquid level, starts manually to carry out pulling out ash；Normal work position will be fallen on after gray moving under stove nose.
Stove nose of the present invention from normal work position rise to+10~+20 position, then under fall on normal work position,
Total used time is 20~30s.
It is using advantageous effect caused by above-mentioned technical proposal：The present invention does not need to stop line, so without using stove nose
Sub- flashboard will not touch strip, by rationally adjusting annealing furnace furnace pressure, control nitrogen hydrogen protective gas pressure, make atmosphere of annealing furnace
In the case of unaffected, so as to complete the work of zinc gray in Hand scarf stove nose.Zinc liquid in online prepurging nose of the invention
The zinc gray in face realizes the purification to zinc liquid level in stove nose, significantly improves the surface quality of galvanizing production, ensure that strip
Zincincation parameter consistency improves the stability of strip even zinc layer and galvanized sheet fine surface quality, ensure that height
The smooth production of surface quality galvanized sheet.
Specific embodiment
The present invention will be further described in detail with reference to the specific embodiments.
Galvanization production line promotes stove nose to realize online clear zinc gray work, need not conform to upper flashboard, cause
Program relationship, stove nose can only be lifted to -60mm positions when being not related to closed furnace nose flashboard, which is the critical point position of liquid level
It puts, and pulling out slag needs stove nose to leave liquid level at least in more than 30mm, therefore, non-someone takes online clear zinc gray technique before this.
This method modification zinc pot control program, in not combined floodgate plate, stove nose can be increased to 20mm, to meet online clear zinc gray position need
It asks, avoids generating the accidents such as parking because chain.
The technique of the method for this Hand scarf stove nose zinc gray is：Annealing furnace is diffused into Close All, annealing furnace furnace pressure dimension
The hydrogen volume content in normal 1.5~2.0mbar of furnace pressure, annealing furnace is held to set and control 1.5~2%；Stove nose is from normal
Working position（- 220 positions）Start the position slowly promoted to+10, stove nose is promoted to zinc liquid level is initially moved off when -60, at this moment
Four people, which cooperate, to be started slowly to pull out ash（Zinc liquid level is stirred, is flowed using zinc liquid level and drives surface zinc gray out of stove nose）, when stove nose
+ 10~+20 are risen to, gray moving terminates, and then stove nose slowly drops to -220 normal work position from+10~+20；Stove nose
The time control for falling total kilometres again is lifted in 20~30s.
Hand scarf stove nose zinc gray observes furnace atmosphere after ten minutes, in practice it has proved that, furnace atmosphere is unaffected.It is plating
Observe offline coil of strip in zinc wire outlet, it can be seen that there are 5 girth sheets face edge to have viscous zinc gray phenomenon, may be used and sheared in Flying Shears by Exit
Fall；Coil of strip rest part is unaffected, behind 10 shifts can continuous production great surface quality galvanized sheet.
Embodiment 1：The method of this Hand scarf stove nose zinc gray uses following concrete technologies.
Annealing furnace is diffused into Close All, annealing furnace furnace pressure maintains normal furnace pressure 1.5mbar, hydrogen content in annealing furnace
It sets and controls 1.8%；Stove nose from normal work position（- 220 positions）Start the position slowly promoted to+10, stove nose carries
Zinc liquid level is initially moved off when being raised to -60, at this moment four people, which cooperate, starts slowly to pull out ash, when stove nose rises to+10, gray moving knot
Beam, then stove nose from+10 slowly drop to -220 normal work position；Stove nose lifts the time control for falling total kilometres again
In 25s.
Embodiment 2：The method of this Hand scarf stove nose zinc gray uses following concrete technologies.
Annealing furnace is diffused into Close All, annealing furnace furnace pressure maintains normal furnace pressure 1.8mbar, hydrogen content in annealing furnace
It sets and controls 2.0%；Stove nose from normal work position（- 220 positions）Start the position slowly promoted to+15, stove nose carries
Zinc liquid level is initially moved off when being raised to -60, at this moment four people, which cooperate, starts slowly to pull out ash, when stove nose rises to+15, gray moving knot
Beam, then stove nose from+15 slowly drop to -220 normal work position；Stove nose lifts the time control for falling total kilometres again
In 20s.
Embodiment 3：The method of this Hand scarf stove nose zinc gray uses following concrete technologies.
Annealing furnace is diffused into Close All, annealing furnace furnace pressure maintains normal furnace pressure 2.0mbar, hydrogen content in annealing furnace
It sets and controls 1.5%；Stove nose from normal work position（- 220 positions）Start the position slowly promoted to+20, stove nose carries
Zinc liquid level is initially moved off when being raised to -60, at this moment four people, which cooperate, starts slowly to pull out ash, when stove nose rises to+20, gray moving knot
Beam, then stove nose from+20 slowly drop to -220 normal work position；Stove nose lifts the time control for falling total kilometres again
In 30s.
Comparative example：The original technique for clearing up stove nose zinc gray is as described below.
（1）Original technique：4# galvanized wires, 10 shifts of continuous production amount to 80 hours, by monitoring it can be seen that moving back
There is one layer of apparent zinc gray on zinc liquid level surface in stove stove nose, and at this time if processing without stove nose zinc gray, zinc gray is not
The belt steel surface of operation can be only adhered to, zinc-plated plate surface coherence of the zinc coating is caused to be deteriorated, surface, which is attached with part zinc gray influence, to be made
With and belt steel surface plating leakage phenomenon being also resulted in, so this every timing node of galvanized wire, it is necessary to which upper 3 lick and cross volume
Parking, a roll stop line, and two roll vehicle heating, often 20 tons of weight of volume, 60 tons altogether；Stove nose flashboard is closed after stopping line, is promoted
Then stove nose pushes the zinc gray of zinc liquid level below stove nose aside removing, then stove nose is fallen after rise from -220 to+20mm with tool
To -220mm working positions, stove nose flashboard is opened, the fusing of crawl zinc pot is returned in strip cadmia part when process section stops strip
After build and opened vehicle, rise search after vehicle because caused by parking every trace scratches the defects of it is errorless after slowly speed-raising heating, transition volume heats up
Enter normal variety production afterwards, transition volume stops line and the drop of vehicle is judged to three-level product, and general control is at 30~60 tons or so；This mistake
Journey will take 3 hours at the soonest to be completed, FC grades of product rates 56%.
（2）This method technique：This method technique, which does not have to ad hoc program transition volume, only to be needed to roll up using the transition of kind transition,
Reduction of speed, which produces, can complete cleaning zinc gray for 3 minutes, and drop, which sentences product, can control within 5 tons, and because not stopping, strip is not
Have cadmia spot, thus will not two pairs of rollers system damage, therefore production below do not have every trace and scratch phenomenon generate, Ke Yizhi
The production into high surface galvanized sheet, the qualification rate 88% of FC products are tapped into, further, it is also possible to reduce the number of the operation of two lookup defects
Personnel.
（3）Process ration：Original technique need to stop line cleaning stove nose zinc gray, generally at least need 3 hours of stopping, average
Medium zinc consumes 900Kg, and drop sentences 30 tons, needs 9 parkings every month, take more than 27 hours, influence 1400 tons of yield, influence
Order is delivered.This method technique clear zinc gray online, can save the medium zinc caused by parking and consume 8.1 ten thousand yuan, monthly avoid stopping
Vehicle 9 times saves 27 hours of time, and yield averagely increases more than 1400 tons, improves FC grades of product rates 30%, can create effect more：13000000
Member.By comparing, it is apparent that being substantially increased using FC qualification rates after Hand scarf stove nose zinc gray, output increased 1400
Ton/the moon.
Claims (2)
- A kind of 1. method of Hand scarf stove nose zinc gray, it is characterised in that：Annealing furnace is diffused into Close All, controls annealing furnace Furnace pressure be 1.5~2.0mbar, hydrogen volume content is 1.5~2.0% in annealing furnace；Then start to promote stove nose, work as stove After nose leaves zinc liquid level, start manually to carry out pulling out ash；Normal work position will be fallen on after gray moving under stove nose.
- 2. the method for Hand scarf stove nose zinc gray according to claim 1, it is characterised in that：The stove nose is from normal Working position rises to+10~+20 position, then under fall on normal work position, total used time is 20~30s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019519.2A CN108251776A (en) | 2018-01-09 | 2018-01-09 | The method of Hand scarf stove nose zinc gray |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019519.2A CN108251776A (en) | 2018-01-09 | 2018-01-09 | The method of Hand scarf stove nose zinc gray |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108251776A true CN108251776A (en) | 2018-07-06 |
Family
ID=62725048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810019519.2A Pending CN108251776A (en) | 2018-01-09 | 2018-01-09 | The method of Hand scarf stove nose zinc gray |
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| Country | Link |
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| CN (1) | CN108251776A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109487192A (en) * | 2018-12-17 | 2019-03-19 | 邯郸钢铁集团有限责任公司 | A kind of zinc-plated automobile exterior panel surface zinc gray, point defects controlling method |
| CN112251695A (en) * | 2020-10-12 | 2021-01-22 | 马鞍山钢铁股份有限公司 | Method for removing zinc oxide film in nose |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202786390U (en) * | 2012-07-25 | 2013-03-13 | 上海梅山钢铁股份有限公司 | Furnace nose device |
| CN205662574U (en) * | 2016-06-12 | 2016-10-26 | 山东汇金彩钢有限公司 | Concertina type stove nose |
| CN206486582U (en) * | 2016-12-31 | 2017-09-12 | 上海东新冶金技术工程有限公司 | Stove nose swinging, telescopic device for galvanizing |
-
2018
- 2018-01-09 CN CN201810019519.2A patent/CN108251776A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202786390U (en) * | 2012-07-25 | 2013-03-13 | 上海梅山钢铁股份有限公司 | Furnace nose device |
| CN205662574U (en) * | 2016-06-12 | 2016-10-26 | 山东汇金彩钢有限公司 | Concertina type stove nose |
| CN206486582U (en) * | 2016-12-31 | 2017-09-12 | 上海东新冶金技术工程有限公司 | Stove nose swinging, telescopic device for galvanizing |
Non-Patent Citations (1)
| Title |
|---|
| 李九岭著: "《热镀锌设备与工艺》", 31 October 2014, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109487192A (en) * | 2018-12-17 | 2019-03-19 | 邯郸钢铁集团有限责任公司 | A kind of zinc-plated automobile exterior panel surface zinc gray, point defects controlling method |
| CN112251695A (en) * | 2020-10-12 | 2021-01-22 | 马鞍山钢铁股份有限公司 | Method for removing zinc oxide film in nose |
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Application publication date: 20180706 |