CN102168238B - A circulating cooling deslagging method in continuous hot dip of zinc-aluminium alloys - Google Patents
A circulating cooling deslagging method in continuous hot dip of zinc-aluminium alloys Download PDFInfo
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- CN102168238B CN102168238B CN2011100451229A CN201110045122A CN102168238B CN 102168238 B CN102168238 B CN 102168238B CN 2011100451229 A CN2011100451229 A CN 2011100451229A CN 201110045122 A CN201110045122 A CN 201110045122A CN 102168238 B CN102168238 B CN 102168238B
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- aluminium liquid
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- circuitous groove
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- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 title claims abstract description 119
- 229910000611 Zinc aluminium Inorganic materials 0.000 title claims abstract description 117
- 238000001816 cooling Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 41
- 229910045601 alloy Inorganic materials 0.000 title abstract description 5
- 239000000956 alloy Substances 0.000 title abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 83
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000011701 zinc Substances 0.000 claims abstract description 73
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 73
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- 238000002844 melting Methods 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 9
- 238000007598 dipping method Methods 0.000 claims description 23
- 239000002893 slag Substances 0.000 claims description 13
- 230000004927 fusion Effects 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 230000008021 deposition Effects 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 18
- 238000000576 coating method Methods 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 241000264877 Hippospongia communis Species 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 11
- 239000000047 product Substances 0.000 description 10
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 5
- 230000002950 deficient Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 231100000241 scar Toxicity 0.000 description 4
- 238000005246 galvanizing Methods 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910018137 Al-Zn Inorganic materials 0.000 description 1
- 229910000989 Alclad Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- 229910018573 Al—Zn Inorganic materials 0.000 description 1
- 208000035126 Facies Diseases 0.000 description 1
- 229910015372 FeAl Inorganic materials 0.000 description 1
- JAUOCGQUHUSGIX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn].[Zn] JAUOCGQUHUSGIX-UHFFFAOYSA-N 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Abstract
The invention relates to a method in the field of metal smelting technology, particularly to a circulating cooling deslagging method in continuous hot dip of zinc-aluminium alloys. The method is characterized by placing a circulating cooling deslagging apparatus in zinc-aluminium liquid in a galvanized zinc pot, wherein the apparatus has an internal temperature lower than the temperature of the zinc-aluminium liquid in the galvanized zinc pot and is provided with a circuitous groove inside and a zinc dross collector at the bottom, with the circuitous groove being open-ended at two ends, provided with a zinc-aluminium liquid driving device at an inlet and embedded with a honeycomb-shaped cooling pipe equipped with an inlet and an outlet; driving the zinc-aluminium liquid to enter the circuitous groove from the inlet of the circuitous groove, pressing molten metal liquid with low temperature and low melting point in the honeycomb-shaped cooling pipe to cool the zinc-aluminium liquid in the circuitous groove when the zinc-aluminium liquid flows through the circuitous groove, reducing the temperature of the zinc-aluminium liquid for the precipitation and growth of the zinc dross from the zinc-aluminium and deposition of the zinc dross in the zinc dross collector at the bottom, and completing the deslagging and purifying of the zinc-aluminium liquid after the zinc-aluminium liquid, from which the zinc dross is precipitated, flows back to the galvanized zinc pot through the outlet of the circuitous groove. The method in the invention can effectively remove the zinc dross in a zinc bath.
Description
Technical field
The present invention relates to a kind of method of Metal smelting technical field, specifically is the method that circulation cools and removes the gred in a kind of continuous hot-dipping zinc-aluminium.
Background technology
Galvanizing is a kind of comparatively effectively and easily steel anti-corrosive method, and its coating has good sacrifice preservative activity; Hot dip alumin(i)um coating is fine and close, the durability period is long; And zinc aluminum alloy coating is used widely because of its performance that has had galvanic protection characteristic, the coating of durable protection feature and the zinc of aluminium concurrently will exceed quite a few times than superior performance, the antiseptic property of single-element coating than pure zinc coating; Because zinc-plated aluminium sheet; Have excellent comprehensive performance and beautiful appearance such as the Galvalume Coated Steel; The trend of alclad sheet and part steel plate galvanized has abroad appearred replacing with this coated sheet; Formed one zinc aluminum alloy coating heat, its product is mainly used in building industry, automotive industry, household electrical appliance and agricultural etc.
At present; A serious problem on the hot dip process production line is exactly the cadmia problem; Because zinc aluminum alloy coating aluminium content is higher, compares with the zinc pond of hot pure zinc plating, the composition in zinc pond changes a lot; Especially when elements such as adding silicon in the zinc-aluminium pond, with making facies relationship wherein become more complicated; Cadmia in zinc-aluminium zinc pond is mutually for containing the FeAl of zinc
3With the Fe-Al-Si intermetallic compound, the density in density zinc-aluminium pond, zinc pond of comparing hot pure zinc plating is little, and 55%Al-Zn zinc-aluminium pond approximately is 1/2 of a hot pure zinc plating; Therefore, in the zinc-aluminium pond, will be easier to form suspension slag and end slag, the origin cause of formation of cadmia and influence factor are wanted much complicated in the specific heat pure zinc plating zinc pond; At present typical Galvalume production line much all exists puzzlement people's cadmia problem; For example Australian Bluescope Steel has three Galvalume production lines to have serious cadmia problem, and equally also there is the cadmia problem in domestic many Galvalume production line.
Zinc-aluminium product face subject matter is that bright spot, zinc granule, zinc scar, the zinc of coating is spent defectives such as inequality, impression, plasticity reduction, and wherein bright spot, zinc granule, zinc scar mainly are because cadmia causes, especially having the greatest impact with the suspension slag; Cadmia is adsorbed on the sinking roller, stablize on the roller and can causes zinc to spend inequality or slag seal defective to coating, and cadmia causes detrimentally affect, the formation of end slag simultaneously can cause the wasting of resources of aluminium zinc liquid to the plasticity of coating etc., the increase production cost; In addition; The end slag that accumulates in aluminium zinc liquid bottom is very difficult to remove; The salvaging that must regularly stop production, this has had a strong impact on production efficiency, if can be through removing the cadmia in the dezincify pond someway; With reducing in the zinc pond cadmia greatly, to improving zinc-plated aluminium quality product, enlarging the product application scope and have very important meaning to the influence of quality product.
Summary of the invention
The purpose of this invention is to provide a kind of deslagging method in the continuous zinc coating production zinc-aluminium molten bath that is used for; One circulation cooling device is set in the inner zinc-aluminium liquid of zinc-plated zinc pot; Utilize cadmia when zinc-aluminium liquid melt temperature reduces, will separate out to grow up and precipitate, thereby reach the purpose of removing dezincify pond cadmia continuously.
The circulation cooling device is inner to be circuitous groove, drives the zinc-aluminium flow through circuitous groove, the embedded cooling tube of this circuitous groove; Charge into the watery fusion molten metal in the pipe continuously; The inner honey comb structure that adopts uniqueness of cooling tube effectively improves heat-exchange capacity, improves managing but effect of outer zinc-aluminium liquid cooling; The long and narrow circuitous groove that is provided with helps flowing of the interior zinc-aluminium liquid of gutter; And prolong the time of zinc-aluminium flow through cooling device; The cooling tube design width is half the for circuitous well width; And highly equal, cadmia cooling performance in device is strengthened, and have the adequate time cooling to separate out to grow up; Moving direction of zinc-aluminium flow and the interior watery fusion molten metal of cooling tube are mobile in the opposite direction in the circuitous groove, make the cooling to zinc-aluminium liquid reach optimal effectiveness.
Cadmia will cause that in continuous zinc coating bright spot, zinc granule, zinc scar, the zinc of coating spends defectives such as inequality, impression, plasticity reduction in the zinc pond; Through deslagging method in the zinc-aluminium molten bath in the continuous zinc coating production of the present invention; After cadmia cooling being separated out grow up; Sedimentation is collected in deslagging device bottom cadmia scoop, can reduce cadmia in the zinc pond in continuous and effective ground, and minimizing continuous zinc coating plate bright spot, zinc granule, zinc scar, zinc are spent defectives such as inequality, impression, plasticity reduction; And the cadmia from reduce the zinc pond improves the quality of products to the influence of quality of coating.After the zinc pond carried out on-line continuous slagging-off, shut down the time of dragging for slag, reduce the raw-material consumption of zinc-aluminium, effectively enhance productivity, reduce production costs reducing.
For achieving the above object, the present invention realizes through following technical scheme, comprises following steps:
The method that circulation cools and removes the gred in a kind of continuous hot-dipping zinc-aluminium; It is characterized in that: the circulation deslagging device that cools is set in the inner zinc-aluminium liquid of zinc-plated zinc pot; Inside is the circuitous groove of both ends open, the honeycomb type cooling tube of embedded tape entry and outlet in the circuitous groove; Drive zinc-aluminium liquid and get into circuitous groove from circuitous groove inlet; The zinc-aluminium flow is when making a circulation groove; In the honeycomb type cooling tube, constantly be pressed into low temperature molten low melting point molten metal zinc-aluminium liquid in the circuitous groove is cooled off, reduce the zinc-aluminium liquid temp and cadmia is separated out grow up from zinc-aluminium liquid, and be deposited in the cadmia scoop that is positioned at the deslagging device bottom; The zinc-aluminium liquid of separating out behind the cadmia flows back to zinc-plated zinc pot via circuitous groove outlet, accomplishes the slag removal and purification to zinc-aluminium liquid.
The circulation method of slagging-off that cools in above-mentioned a kind of continuous hot-dipping zinc-aluminium is characterized in that: adopt the method for electromagnetic drive to make in the zinc-plated zinc pot zinc-aluminium flow go into circuitous groove.
The circulation method of slagging-off that cools in above-mentioned a kind of continuous hot-dipping zinc-aluminium is characterized in that: the said circulation temperature of zinc-aluminium liquid that cools in the circuitous groove of deslagging device is lower than in the zinc-plated zinc pot 20～50 ℃ of zinc-aluminium liquid temps.
The method that circulation cools and removes the gred in above-mentioned a kind of continuous hot-dipping zinc-aluminium, it is characterized in that: the velocity of flow of zinc-aluminium liquid is 50-500kg/min in the said circuitous groove.
The circulation method of slagging-off that cools in above-mentioned a kind of continuous hot-dipping zinc-aluminium, it is characterized in that: 20～60% cadmia is separated out by cooling and is precipitated in the zinc-aluminium liquid.
The method that circulation cools and removes the gred in above-mentioned a kind of continuous hot-dipping zinc-aluminium, it is characterized in that: said low temperature molten low melting point molten metal comprises tin and zinc.
The method that circulation cools and removes the gred in above-mentioned a kind of continuous hot-dipping zinc-aluminium is characterized in that: the watery fusion molten metal is mobile in the opposite direction in moving direction of the interior zinc-aluminium flow of circuitous groove and the cooling tube.
The deslagging device that cools circulates in above-mentioned a kind of continuous hot-dipping zinc-aluminium; The said circulation deslagging device that cools is arranged in the inner zinc-aluminium liquid of zinc-plated zinc pot; It is characterized in that: the cool inside of deslagging device of said circulation is the circuitous groove of both ends open; The cool bottom of deslagging device of said circulation is the cadmia scoop; The honeycomb type cooling tube of the interior dress low temperature molten low melting point molten metal of built-in tape entry and outlet in the circuitous groove, circuitous groove inlet are provided with zinc-aluminium liquid drive unit driving zinc-aluminium liquid and get into circuitous groove from circuitous groove inlet, and zinc-aluminium liquid flows back to zinc-plated zinc pot from the groove outlet nature that makes a circulation.
The circulation deslagging device that cools in above-mentioned a kind of continuous hot-dipping zinc-aluminium is characterized in that: the cool top of deslagging device of said circulation is lower than zinc-plated zinc pot zinc-aluminium liquid liquid level 20～40cm.
Said circulation all parts of deslagging device that cool all adopt heat-proof corrosion-resistant materials such as steel framed structure, outer coating stainless steel, fireclay; The honeycomb type cooling tube adopts steel structure to cover the good heat-proof corrosion-resistant thermally conductive materials such as stainless steel of thermal conductivity outward.
The device that circulation cools and removes the gred in above-mentioned a kind of continuous hot-dipping zinc-aluminium, it is characterized in that: said circuitous well width is 10～12cm, the degree of depth is 30～60cm; Entrance and exit adopts circle or square structure, and the entrance and exit cross-sectional area is 50～80cm
2
The circulation device of slagging-off that cools in above-mentioned a kind of continuous hot-dipping zinc-aluminium, it is characterized in that: cooling tube adopts square pipe, and width is half the for circuitous well width, highly equals the degree of depth of circuitous groove.
The device that circulation cools and removes the gred in above-mentioned a kind of continuous hot-dipping zinc-aluminium; It is characterized in that: constantly be pressed into low temperature molten low melting point molten metal at honeycomb type cooling tube inlet; To satisfy zinc-aluminium liquid in the circuitous groove is carried out the refrigerative requirement; After the zinc-aluminium liquid cooling was but lowered the temperature in the circuitous groove, molten metal bath flowed out to reclaim again from the cooling tube outlet and utilizes.
The step and the characteristic of said method comprise:
(1) constantly is pressed into low temperature molten low melting point molten metal from honeycomb type cooling tube inlet and gets into the honeycomb type cooling tube; Low temperature molten low melting point molten metal is with the certain speed honeycomb type cooling tube of flowing through; To satisfy zinc-aluminium liquid in the circuitous groove is carried out the refrigerative requirement, and utilize again from outlet outflow recovery;
(2) circuitous groove inlet drive unit drives zinc-aluminium liquid in the zinc-plated zinc pond and gets into circuitous groove, and zinc-aluminium liquid velocity of flow in circuitous groove is 50-500kg/min;
(3) utilize the honeycomb type cooling tube to reduce zinc-aluminium liquid temp in the circuitous groove, temperature is lower than 20～50 ℃ of zinc-plated zinc pot zinc-aluminium liquid temps in the circuitous groove of circulation cooling device;
When (4) the zinc-aluminium liquid temp reduced in the circuitous groove, cadmia was separated out from zinc-aluminium liquid and is grown up, and is precipitated to the cadmia scoop that is arranged on the bottom;
(5) zinc-aluminium liquid is in flow process in the circuitous groove, and 20～60% cadmia is separated out deposition by cooling, is back to zinc-plated zinc pond via circuitous groove outlet, accomplishes the slag removal and purification to zinc-aluminium liquid;
(6) in continuous slag removal, cadmia continues to increase in the cadmia scoop of bottom, when reaching a certain amount of, can clear up it in online or time-out slagging-off.
The cool method of slagging-off of circulation of the present invention, for the continuous hot-dipping zinc-aluminium provides a kind of method of slagging-off, slag removal is accomplished in circulation cools deslagging device; Can be applicable to outside the tinuous production interior lines; Under pressure, low temperature molten low melting point metal is pressed into the honeycomb type cooling tube, and with the certain speed honeycomb type cooling tube of flowing through; To satisfy zinc-aluminium liquid in the circuitous groove is carried out the refrigerative requirement, and utilize again from outlet outflow recovery.Under motivating force effects such as electromagnetic drive, the zinc-aluminium flow is flowed in the circuitous groove through circuitous groove inlet, zinc-aluminium liquid is lowered the temperature under the effect of honeycomb type cooling tube and is separated out cadmia; And grow up and be precipitated to bottom cadmia scoop; And, reduce the cadmia content in the zinc-aluminium liquid in the zinc-plated zinc pot through the zinc-plated zinc pot of the logical circuitous groove outlet natural back flow of the zinc-aluminium liquid after the cooling slagging-off, for producing high-quality hot dip process steel plate clean zinc pool environment is provided; Reduce cadmia defective the hot-dip aluminum zinc steel plate from the source; Stablize the quality product of hot-dip galvanized steel sheet, give security, enlarge the product application scope for high hot dip process steel plate quality is provided; Reduce the loss of zinc-aluminium, have considerable social benefit and economic benefit.
Description of drawings
The accompanying drawing of explanation is used for the present invention is done further explanation here, constitutes the application's a part, and indicative icon of the present invention is used to explain the present invention, does not constitute improper qualification of the present invention, and protection scope of the present invention is not limited to following synoptic diagram;
In the accompanying drawings:
Fig. 1 is the present invention circulation slagging-off synoptic diagram that cools;
Fig. 2 is steel plate galvanizing process and the circulation deslagging device equipment position view that cools;
Fig. 3 is the cool cross sectional representation of deslagging device of the present invention circulation;
Fig. 4 is the present invention circulation deslagging device A place vertical section synoptic diagram that cools.
Fig. 5 is the present invention circulation deslagging device B place vertical section synoptic diagram that cools;
Drawing reference numeral:
| [1] zinc-plated zinc pot | [2] circuitous groove inlet | [3] zinc-aluminium liquid drive unit |
| [4] cooling tube outlet | [5] circuitous groove | [6] the circulation deslagging device that cools |
| [7] cooling tube inlet | [8] low-temperature metal liquid drive unit | [9] circuitous groove outlet |
| [10] cadmia | [11] cooling tube | [12] low-temperature metal liquid |
| [13] zinc-aluminium liquid | [14] air knife | [15] band steel |
| [16] sinking roller | [17] zinc liquid level | [18] cadmia scoop. |
Embodiment
Come specifically to introduce present embodiment below in conjunction with accompanying drawing and elaborate: present embodiment provided detailed embodiment and process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
In conjunction with Fig. 1～shown in Figure 4; The cool method of slagging-off of circulation comprises zinc-plated zinc pot 1 and the circulation deslagging device 6 that cools in the continuous hot-dipping zinc-aluminium of the present invention; Circulation deslagging device 6 installation sites that cool, the height that its top is lower than the zinc liquid level 17 of zinc-plated zinc pot 1 is h, difference of altitude is 20～40cm; Steel plate galvanizing process is accomplished in zinc-plated zinc pot 1, and the circulation deslagging device 6 that cools is used for cooling slagging-off; Circulation cools and is circuitous groove 5 in the deslagging device 6, and circuitous groove 5 two ends are circuitous groove inlet 2 and circuitous groove outlet 9, and zinc-aluminium liquid 13 is under 3 effects of zinc-aluminium liquid drive unit; Get into circuitous groove 5 through circuitous groove inlet 2; Be back to zinc-plated zinc pond 1 from circuitous groove outlet 9 after slagging-off is accomplished, circuitous groove 5 embedded cooling tubes 11 are honey comb structure in the cooling tube 11; Cooling tube 11 has comprised cooling tube inlet 7 and cooling tube outlet 4; Low-temperature metal liquid 12 gets into cooling tube 11 from cooling tube inlet 7 under 8 effects of low-temperature metal liquid drive unit, flow out to reclaim again from cooling tube outlet 4 afterwards and utilize.
Said zinc-plated zinc pot 1 adopts the electromagnetic induction heating mode to heat; Temperature is 580～620 ℃, constantly is pressed into liquid low-temperature metal liquid 12 in the cooling tube 11, and said low-temperature metal liquid 12 comprises tin and zinc; Temperature is 200～450 ℃; When low-temperature metal liquid 12 is flowed through cooling tube 11, take away mobile zinc-aluminium liquid 13 heats in the circuitous groove 5, make the temperature of zinc-aluminium liquid 13 in the circuitous groove 5 reduce by 20～50 ℃; A large amount of cadmias are separated out from the zinc-aluminium liquid 13 that reduces temperature and are grown up and be deposited in the cadmia scoop 18 that is positioned at the bottom; Zinc-aluminium liquid 13 is back to zinc-plated zinc pot 1 through the cooling slagging-off after export 9 by circuitous groove, accomplishes the slag removal to zinc-aluminium liquid, and 20～60% cadmia is separated out deposition by cooling in the zinc-aluminium liquid.
Visible from above-mentioned embodiment; The method utilization method that circulation cools to zinc-aluminium liquid that circulation cools and removes the gred in the continuous hot-dipping zinc-aluminium of the present invention is effectively removed the cadmia in the zinc-aluminium liquid, for producing high-quality hot dip process steel plate clean zinc pool environment is provided; Fundamentally avoid cadmia generation of defects in the hot-dip aluminum zinc steel plate; Stablize the quality product of hot-dip galvanized steel sheet, give security, enlarge the product application scope for high hot dip process steel plate quality is provided; The loss of zinc-aluminium be can reduce simultaneously, considerable social benefit and economic benefit brought.
Claims (6)
1. the cool method of slagging-off of circulation in the continuous hot-dipping zinc-aluminium; It is characterized in that: an inner circulation for the circuitous groove of the both ends open deslagging device that cools is set, the honeycomb type cooling tube of embedded tape entry and outlet in the groove that makes a circulation in the inner zinc-aluminium liquid of zinc-plated zinc pot; Drive zinc-aluminium liquid and get into circuitous groove from circuitous groove inlet; The zinc-aluminium flow is when making a circulation groove; In the honeycomb type cooling tube, constantly be pressed into low temperature molten low melting point tin or zinc liquid zinc-aluminium liquid in the circuitous groove is cooled off, reduce the zinc-aluminium liquid temp and cadmia is separated out grow up from zinc-aluminium liquid, and be deposited in the cadmia scoop that is positioned at the deslagging device bottom; The zinc-aluminium liquid of separating out behind the cadmia flows back to zinc-plated zinc pot via circuitous groove outlet, accomplishes the slag removal and purification to zinc-aluminium liquid.
2. the circulation method of slagging-off that cools in a kind of continuous hot-dipping zinc-aluminium as claimed in claim 1 is characterized in that: adopt the method for electromagnetic drive to make in the zinc-plated zinc pot zinc-aluminium flow go into circuitous groove.
3. the circulation method of slagging-off that cools in a kind of continuous hot-dipping zinc-aluminium as claimed in claim 1 is characterized in that: the said circulation temperature of zinc-aluminium liquid that cools in the circuitous groove of deslagging device is lower than in the zinc-plated zinc pot 20～50 ℃ of zinc-aluminium liquid temps.
4. the method that circulation cools and removes the gred in a kind of continuous hot-dipping zinc-aluminium as claimed in claim 1, it is characterized in that: the velocity of flow of zinc-aluminium liquid is 50-500kg/min in the said circuitous groove.
5. the circulation method of slagging-off that cools in a kind of continuous hot-dipping zinc-aluminium as claimed in claim 1, it is characterized in that: 20～60% cadmia is separated out by cooling and is precipitated in the zinc-aluminium liquid.
6. the method that circulation cools and removes the gred in a kind of continuous hot-dipping zinc-aluminium as claimed in claim 1 is characterized in that: the watery fusion molten metal is mobile in the opposite direction in moving direction of the interior zinc-aluminium flow of circuitous groove and the cooling tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100451229A CN102168238B (en) | 2011-02-25 | 2011-02-25 | A circulating cooling deslagging method in continuous hot dip of zinc-aluminium alloys |
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| CN2011100451229A CN102168238B (en) | 2011-02-25 | 2011-02-25 | A circulating cooling deslagging method in continuous hot dip of zinc-aluminium alloys |
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| CN102168238B true CN102168238B (en) | 2012-11-07 |
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| CN102168237B (en) * | 2011-02-25 | 2013-10-30 | 常州大学 | Circulating cooling deslagging device for continuous hot immersion plating of zinc and aluminum |
| ES2639088T3 (en) | 2011-10-20 | 2017-10-25 | Arcelormittal | Temper coating procedure of a steel band and installation for implementation |
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| CN100462454C (en) * | 2007-06-07 | 2009-02-18 | 上海交通大学 | Dual channel electromagnetic method for separating zinc dross from hot galvanizing zinc fluid |
| CN101104917A (en) * | 2007-08-09 | 2008-01-16 | 上海交通大学 | Composite purification device for continuously removing zinc slag in heat zinc coating liquid |
| CN201583145U (en) * | 2009-12-11 | 2010-09-15 | 建业庆松集团有限公司 | Energy-saving slag-discharge cooler |
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