CN107988572A - The quick method for removing bottom ash in zinc pot - Google Patents
The quick method for removing bottom ash in zinc pot Download PDFInfo
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- CN107988572A CN107988572A CN201711285020.8A CN201711285020A CN107988572A CN 107988572 A CN107988572 A CN 107988572A CN 201711285020 A CN201711285020 A CN 201711285020A CN 107988572 A CN107988572 A CN 107988572A
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- zinc
- pot
- zinc pot
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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
Abstract
The invention discloses a kind of quick method for removing bottom ash in zinc pot, it is specially：After alloying galvanizing plate produces, the ZnAl alloy ingot for being first 8% toward zinc pot addition aluminium content, is promoted to 0.38% 0.5% by the aluminium content of zinc liquid in zinc pot, is detecting the aluminium content in zinc pot in zinc liquid during add ZnAl alloy ingot in real time；When aluminium content reaches 0.38% 0.5%, stop the ZnAl alloy ingot that addition aluminium content is 8%；The ZnAl alloy ingot for being 0.575% to zinc pot addition aluminium content, when the iron content stabilization of zinc liquid in zinc pot is when within 0.01%, bottom ash is removed and finished in zinc pot.Bottom ash of the energy Rapid replacement list zinc pot production line of the invention formed in alloying galvanizing plate production process, reduces the iron content in zinc liquid, suppresses zinc granule and produce, reduce zinc granule defect probability of happening.
Description
Technical field
The invention belongs to Metal surface anti-corrosion processing technology field, and in particular to a kind of quick side for removing bottom ash in zinc pot
Method.
Background technology
Conventional alloying galvanizing plate product and double variety production lines of pure zinc galvanizing production switch above-mentioned two kind
Production model is double pot patterns, i.e. special zinc pot is respectively adopted in alloying galvanizing plate product and pure zinc coating product.Alloying is plated
In zine plate process of producing product, strip enters zinc pot plate temperature at 460-500 DEG C or so, and at 455 DEG C or so, zinc liquid Al contains zinc pot temperature
Measure relatively low（Within 0.15%）, belt steel surface can not form effective Fe2 Al5Barrier layer, strip can not into zinc pot rear surface iron
The ground avoided is largely dissolved into zinc liquid, causes in zinc pot iron content to be drastically increased to 0.04% or so, in zinc liquid supersaturation separate out
Iron can react with the zinc in zinc liquid to be formed a large amount of Zn-Fe compounds be sunken to the bottom of a pan formed bottom ash.Produced in alloying galvanizing plate
Product switch zinc pot after producing and produce pure zinc hot dip zinc product, and at this time, need to adjust zinc liquid component in zinc pot makes bottom ash and zinc liquid
In aluminium react to form scum silica frost（Zinc pot by adding high aluminium ingot mode by the Zn-Fe compound bottom ash in zinc pot with adding offline
The reactive aluminum entered forms zinc-iron aluminium compound and forms scum silica frost）, removed so that the bottom ash in zinc pot be replaced.
Three cold-rolling galvanization unit of Wuhan Iron and Steel Plant only has one group of zinc pot at present, after each alloying galvanizing plate variety production finishes,
Zinc liquid aluminium content adjustment need to be carried out, zinc liquid aluminium content is increased to more than 0.18%, it is ensured that forms Fe2Al5Binder course ensures pure zinc
The surface attachment performance of galvanized sheet.When controlling technique using this conventional zinc liquid aluminium content, zinc liquid effectively can not be quickly removed
In bottom ash and reduce zinc liquid iron content, during liter aluminium and rise after aluminium in the quite a long time, can be produced in zinc liquid
Raw substantial amounts of suspension slag, this tiny suspension slag can cause zinc granule defect if belt steel surface is attached to.During this period of time
The pure zinc heat zinc coating plate product of high surface requirements can not be produced, this is because：Since zinc granule hardness is big, there is this kind to lack
Fall into（Zinc granule defect）Strip in rolling or punching course can wounded substrate, cause coining defect, extreme influence surface quality.
Zinc granule defect can cause a large amount of automobile exterior panels not meet automobile factory's requirement and change the original sentence to, and Automobile Plate lumber recovery be influenced, to iron company
Cause a large amount of economic losses.
The zinc granule defect of strip surface quality is influenced, is because the iron content that zinc liquid dissolves in zinc pot is excessively superb in essence
Cross the solubility of zinc liquid and be in hypersaturated state, the iron that supersaturation separates out and aluminium in zinc liquid or zinc reaction generation high rigidity high-melting-point
Zinc-iron aluminium compound.In traditional handicraft control, aluminium content is controlled in 0.18-0.024% or so, it is difficult to reduce the iron in zinc pot
Content, generally still meets in 0.008-0.018%, the external condition that zinc granule is formed, and zinc granule can not be controlled from source in production process
Defect produces.And after alloying galvanizing plate production, there are a large amount of iron zinc compounds in zinc liquid（Bottom ash）, its with
The aluminium that reactive aluminum in zinc liquid can be consumed largely during forming zinc-iron aluminium compound in zinc liquid reduces the aluminium content in zinc liquid；
Iron content solubility at the same time during alloying galvanizing plate production in zinc liquid is higher（0.04% or so）, it is switched to pure zine plate
After production technology, the iron being dissolved in zinc liquid is in hypersaturated state, the iron that supersaturation separates out and the aluminum and zinc reaction shape in zinc liquid
Substantial amounts of aluminium in zinc liquid is consumed into zinc-iron aluminium compound, can largely reduce zinc liquid aluminium content；The zinc-iron aluminium formed in the above process
Compound, that is, suspension slag can largely be attached to belt steel surface and form zinc granule cadmia defect, and the reduction of zinc liquid aluminium content can make zinc liquid
Middle iron content maintains a high value, causes persistently to produce suspension slag in zinc liquid in longer period of time, so that strip
Surface produces zinc granule defect, influences the surface quality of the pure zinc galvanizing production on high-grade surface, can not produce during this period high
The pure zinc galvanizing production in surface.
Therefore, we are there is an urgent need to a kind of quick method for removing bottom ash in zinc pot, to improve strip quality, shorten and remove the gred
In the cycle, improve the production capacity of the pure zinc galvanizing production in high-grade surface.
The content of the invention
It is an object of the invention to provide a kind of quick method for removing bottom ash in zinc pot, this method energy Rapid replacement list zinc
Bottom ash of the pot production line formed in alloying galvanizing plate production process, reduces the iron content in zinc liquid, suppresses zinc granule and produces,
Reduce zinc granule defect probability of happening.
The technical solution adopted in the present invention is：
A kind of bottom ash method in quick removal zinc pot, is specially：After alloying galvanizing plate produces, first toward zinc pot addition aluminium
Content is 8% ZnAl alloy ingot, and the aluminium content of zinc liquid in zinc pot is promoted to from 0.18-0.24% of Traditional control technique or so
0.38%-0.5%, is detecting the aluminium content in zinc pot in zinc liquid in real time during adding ZnAl alloy ingot；When aluminium content reaches
Stop the alumin(i)um zinc alloy ingot that addition aluminium content is 8% during 0.38%-0.5%, the allumen for being 0.575% to zinc pot addition aluminium content
Ingot, when the iron content stabilization of zinc liquid in zinc pot is when within 0.01%, bottom ash is removed and finished in zinc pot.
When the iron content stabilization of zinc liquid in zinc pot is when within 0.01%, i.e., after Zinc bath bottom slag is removed, you can production is pure
Zinc galvanized sheet（The production cycle for producing high-grade exterior automotive plate can be entered）.
Removing in zinc pot in this period of bottom ash（Start increase aluminium content to aluminium content stablize keep this section when
In）, belt steel surface is adhered to because a large amount of bottom ash are replaced into suspension slag, influences product surface quality, so can only produce general
Merchantable timber（Building structure is with material and appliance plate inner panel material）.
In the present invention, removing in zinc pot during bottom ash, with the rise that aluminium content peak is worth, Zinc bath bottom slag is put
Throw-over rate is faster, and removing is time-consuming shorter, can be good at meeting the requirement that control zinc granule defect produces.
The beneficial effects of the present invention are：
After having produced alloying kind, zinc liquid Al content is 0.14% or so, it is necessary to ZnAl alloy ingot by adding aluminium content 8%
Quick rise zinc liquid Al content is allowed to the platability for possessing pure zinc coating, in the 8% ZnAl alloy ingot phase that added to more than 0.18%
Between, the iron dissolved in zinc liquid promptly can separate out to form suspension slag in hypersaturated state.When zinc liquid aluminium content increases to 0.38-
0.5% or so, relative to traditional zinc liquid Al content desired value, the reaction efficiency of bottom ash can be substantially improved, the quick shape of suspension slag
Into, effectively shorten the slagging-off before the production of the pure zinc galvanized sheet in high-grade surface adjustment the cycle.Actual production the result shows that, use
The aluminium content control method of the present invention, will not cause coating adhesion not conform to, will not form other new surface defects, remove the gred
Cycle shortened to 5 days or so from original more than 15 days, released more high surface grades（High value added product）Production capacity.
The present invention can quickly improve the pollution during alloying production to zinc pot, and Rapid replacement Zinc bath bottom slag, subtracts
Few zinc liquid iron content, suppresses zinc granule and produces, reduce zinc granule defect probability of happening, improve strip surface quality.
Brief description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is the aluminium of the production zinc-plated and high-grade surface heat zinc immersion product of alloying in single zinc pot production line single production cycle
Content control schematic diagram.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Embodiment 1
It is continuous toward the ZnAl alloy ingot that addition aluminium content is 8% in zinc pot after alloying galvanizing plate production, by zinc pot
The aluminium content of middle zinc liquid is promoted to 0.38% from 0.20% or so of Traditional control technique, during ZnAl alloy ingot is added in real time
Zinc pot aluminium content is detected, stops the ZnAl alloy ingot that addition content is 8% after content reaches 0.38%, being changed to addition aluminium content is
0.575% ZnAl alloy ingot, iron content is down within 0.01% when the used time 240 is small or so, and bottom ash is cleared up substantially in zinc pot at this time
Finish, possess pure zinc galvanizing outside plate production capacity.Referring to Fig. 1,0.01% or so is down to starting increase aluminium content to iron content
This period in, it is necessary to minimum surface requirement 1000 tons of pure zinc galvanized sheet, it is necessary to 9000 tons of the merchantable timber generally required.Phase
For traditional zinc liquid Al content control range（0.18-0.24%）, the relatively low kind production of the surface requirements needed for the adjusting stage that remove the gred
Amount reduces 5000 tons or so, releases more high surface grades（High value added product）Production capacity.
Embodiment 2
It is continuous toward the ZnAl alloy ingot that addition aluminium content is 8% in zinc pot after alloying galvanizing plate production, by zinc pot
Aluminium content is promoted to 0.45% from 0.20% or so of Traditional control technique, is detected in real time in zinc pot during addition ZnAl alloy ingot
Zinc liquid aluminium content, stops the ZnAl alloy ingot that addition content is 8% after content reaches 0.45%, is changed to addition aluminium content and is
0.575% ZnAl alloy ingot, when the used time 120 is small or so, iron content is down within 0.01% in zinc liquid, at this time bottom ash base in zinc pot
Originally clean out, have pure zinc galvanizing outside plate production capacity.Start increase aluminium content to iron content stablize keep this section when
In, it is necessary to minimum surface requirement 200 tons of pure zinc galvanized sheet, it is necessary to 5000 tons of the merchantable timber generally required.
Embodiment 3
It is continuous toward the ZnAl alloy ingot that addition aluminium content is 8% in zinc pot after alloying galvanizing plate production, by zinc pot
Aluminium content is promoted to 0.50% from 0.20% or so of Traditional control technique, adds real-time detection zinc liquid aluminium during ZnAl alloy ingot
Content, stops the ZnAl alloy ingot that addition content is 8% after content reaches 0.50%, is changed to the zinc that addition aluminium content is 0.575%
Ingot, when the used time 72 is small or so, iron content in zinc liquid is down within 0.01%, bottom ash cleans out substantially in zinc pot at this time.Unit
Possess pure zinc galvanizing outside plate production capacity, start increase aluminium content to iron content stablize keep this period in, it is necessary to
200 tons of the pure zinc galvanized sheet of minimum surface requirement is, it is necessary to 3000 tons of the merchantable timber generally required.
The present invention can quickly improve the pollution during alloying production to zinc pot, improve pure zine plate belt steel surface matter
Amount, reduces double pot operating costs, and this method is used in three subsidiary factory's galvanized wire of Wuhan Iron and Steel Plant cold rolling at present, applied to high-grade alloy
Change and pure zinc outside plate produces.Zinc pot iron content can be extremely efficiently reduced using this method to pollute；Alloying is high after producing
The production time of the pure zinc plating plate of grade was tapered within 5 days by original 15 days, can monthly produce high-grade surface production in 10 days more
Product, by 1040 tons of daily output, the 200 yuan of calculating in high-grade surface and general surface product price difference, year benefit be 1067*200*12=256
Ten thousand yuan/year, reduce about 4,000,000 yuan/year of the zinc pot electricity charge.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (3)
- A kind of 1. quick method for removing bottom ash in zinc pot, it is characterised in that：After alloying galvanizing plate produces, first toward zinc The ZnAl alloy ingot that pot addition aluminium content is 8%, 0.38%-0.5% is promoted to by the aluminium content of zinc liquid in zinc pot, in addition zinc-aluminium The aluminium content in zinc pot in zinc liquid is detected during alloy pig in real time；When aluminium content reaches 0.38%-0.5%, stop addition aluminium Content is 8% ZnAl alloy ingot, the ZnAl alloy ingot for being 0.575% to zinc pot addition aluminium content, when the iron of zinc liquid in zinc pot contains Amount is stablized when within 0.01%, and bottom ash is removed and finished in zinc pot.
- 2. the quick method for removing bottom ash in zinc pot according to claim 1, it is characterised in that：When the iron of zinc liquid in zinc pot For stable content when within 0.01%, Zinc bath bottom slag can enter after removing produces the pure zinc zinc-plated automobile exterior panel production cycle.
- 3. the quick method for removing bottom ash in zinc pot according to claim 1 or 2, it is characterised in that：Removing in zinc pot In this period of bottom ash, the relatively low merchantable timber of surface requirements is only produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711285020.8A CN107988572A (en) | 2017-12-07 | 2017-12-07 | The quick method for removing bottom ash in zinc pot |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711285020.8A CN107988572A (en) | 2017-12-07 | 2017-12-07 | The quick method for removing bottom ash in zinc pot |
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| CN107988572A true CN107988572A (en) | 2018-05-04 |
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| CN201711285020.8A Pending CN107988572A (en) | 2017-12-07 | 2017-12-07 | The quick method for removing bottom ash in zinc pot |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108796415A (en) * | 2018-07-25 | 2018-11-13 | 武汉钢铁有限公司 | The high alumina ingredient control method of hot-dip galvanized pan |
| CN109852916A (en) * | 2019-03-18 | 2019-06-07 | 常熟科弘材料科技有限公司 | The method for removing the soft slag of suspension slag and bottom in aluminium zinc plating pot |
| CN110592514A (en) * | 2019-10-21 | 2019-12-20 | 山东钢铁集团日照有限公司 | Method for removing bottom slag and scum in zinc pot |
| CN111876710A (en) * | 2020-06-30 | 2020-11-03 | 武汉钢铁有限公司 | Control method of zinc dross in hot-dip galvanizing pot |
| CN113652722A (en) * | 2021-08-19 | 2021-11-16 | 马鞍山钢铁股份有限公司 | Zinc-aluminum-magnesium alloy ingot and method for producing uniform zinc-aluminum-magnesium plating solution |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104988446A (en) * | 2015-07-17 | 2015-10-21 | 武汉钢铁(集团)公司 | Galvanizing method for improving surface quality of hot galvanized plate |
-
2017
- 2017-12-07 CN CN201711285020.8A patent/CN107988572A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104988446A (en) * | 2015-07-17 | 2015-10-21 | 武汉钢铁(集团)公司 | Galvanizing method for improving surface quality of hot galvanized plate |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108796415A (en) * | 2018-07-25 | 2018-11-13 | 武汉钢铁有限公司 | The high alumina ingredient control method of hot-dip galvanized pan |
| CN108796415B (en) * | 2018-07-25 | 2020-07-14 | 武汉钢铁有限公司 | High-aluminum component control method for hot-dip galvanizing zinc pot |
| CN109852916A (en) * | 2019-03-18 | 2019-06-07 | 常熟科弘材料科技有限公司 | The method for removing the soft slag of suspension slag and bottom in aluminium zinc plating pot |
| CN110592514A (en) * | 2019-10-21 | 2019-12-20 | 山东钢铁集团日照有限公司 | Method for removing bottom slag and scum in zinc pot |
| CN111876710A (en) * | 2020-06-30 | 2020-11-03 | 武汉钢铁有限公司 | Control method of zinc dross in hot-dip galvanizing pot |
| CN111876710B (en) * | 2020-06-30 | 2022-05-31 | 武汉钢铁有限公司 | Control method of zinc dross in hot-dip galvanizing pot |
| CN113652722A (en) * | 2021-08-19 | 2021-11-16 | 马鞍山钢铁股份有限公司 | Zinc-aluminum-magnesium alloy ingot and method for producing uniform zinc-aluminum-magnesium plating solution |
| CN113652722B (en) * | 2021-08-19 | 2022-12-27 | 马鞍山钢铁股份有限公司 | Zinc-aluminum-magnesium alloy ingot and method for producing uniform zinc-aluminum-magnesium plating solution |
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Application publication date: 20180504 |