CN101560607B - Zinc liquid suspension treatment agent for hot galvanizing and preparation method thereof - Google Patents
Zinc liquid suspension treatment agent for hot galvanizing and preparation method thereof Download PDFInfo
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- CN101560607B CN101560607B CN2009100746105A CN200910074610A CN101560607B CN 101560607 B CN101560607 B CN 101560607B CN 2009100746105 A CN2009100746105 A CN 2009100746105A CN 200910074610 A CN200910074610 A CN 200910074610A CN 101560607 B CN101560607 B CN 101560607B
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- agent
- zinc liquid
- treatment agent
- preparation
- zinc
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 51
- 239000011701 zinc Substances 0.000 title claims abstract description 51
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 33
- 238000005246 galvanizing Methods 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000006194 liquid suspension Substances 0.000 title claims description 10
- 239000002994 raw material Substances 0.000 claims abstract description 19
- -1 iron ions Chemical class 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000007670 refining Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 6
- 239000011230 binding agent Substances 0.000 claims description 10
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- 239000004088 foaming agent Substances 0.000 claims description 9
- 239000012752 auxiliary agent Substances 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 6
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 5
- 239000004927 clay Substances 0.000 claims description 5
- 239000010436 fluorite Substances 0.000 claims description 5
- 235000005074 zinc chloride Nutrition 0.000 claims description 5
- 239000011592 zinc chloride Substances 0.000 claims description 5
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims description 4
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 4
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 235000019270 ammonium chloride Nutrition 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 3
- 235000015320 potassium carbonate Nutrition 0.000 claims description 3
- 239000004317 sodium nitrate Substances 0.000 claims description 3
- 235000010344 sodium nitrate Nutrition 0.000 claims description 3
- 229940001516 sodium nitrate Drugs 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 2
- 229910021538 borax Inorganic materials 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- 229960001708 magnesium carbonate Drugs 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- 239000004323 potassium nitrate Substances 0.000 claims description 2
- 235000010333 potassium nitrate Nutrition 0.000 claims description 2
- 239000004328 sodium tetraborate Substances 0.000 claims description 2
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 2
- 229910001495 sodium tetrafluoroborate Inorganic materials 0.000 claims description 2
- 239000010455 vermiculite Substances 0.000 claims description 2
- 229910052902 vermiculite Inorganic materials 0.000 claims description 2
- 235000019354 vermiculite Nutrition 0.000 claims description 2
- DUNKXUFBGCUVQW-UHFFFAOYSA-J zirconium tetrachloride Chemical compound Cl[Zr](Cl)(Cl)Cl DUNKXUFBGCUVQW-UHFFFAOYSA-J 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 20
- 229910052742 iron Inorganic materials 0.000 abstract description 12
- 239000012535 impurity Substances 0.000 abstract description 5
- 239000000725 suspension Substances 0.000 abstract 4
- 238000003825 pressing Methods 0.000 abstract 2
- 238000005498 polishing Methods 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Chemical group 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000005649 metathesis reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010959 steel Chemical group 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
The invention relates to a suspension treatment agent for reducing suspension in hot galvanizing zinc liquid, and simultaneously relates to a method for preparing the suspension treatment agent. The treatment agent is prepared from a gas forming agent, a metal displacer, a refining assistant and porous stuffing. The preparation method comprises the following steps of selecting the raw materials, evenly mixing the raw materials by using a solid mixer, and pressing the raw materials into blocks by using a block pressing machine. The treatment agent and the preparation method of the technical proposal can effectively remove suspension impurities in the zinc liquid, reduce the content of iron ions in the zinc liquid, improve the liquidity of the zinc liquid, eliminate the quality problems suchas dross on the surface of a plated element and the like, smoothen the surface of a plated element product, and reduce the polishing workload of a galvanized product.
Description
Technical field
The present invention relates to a kind of outstanding slag treating agent that reduces outstanding slag in the hot dip galvanizing zinc liquid, also relate to a kind of preparation method that should hang slag treating agent simultaneously.
Background technology
Pot galvanize is that iron and steel parts is immersed in the melt metal zinc a kind of method that obtains coating, in hot galvanizing process, because zinc liquid is brought into zinc liquid to the corrosion and the iron ion in the plating assistant agent of iron zinc pot, causes the iron level in the zinc liquid constantly to increase.The solubleness of iron in zinc liquid was about 0.035% when zinc liquid temperature was 450 ℃, and unnecessary iron and zinc form the zinc-iron alloy (cadmia) that is insoluble to zinc liquid and is suspended in the zinc liquid.Can only pull end slag out when dragging for slag, and the iron that is suspended in the zinc liquid can't be pulled out, the ferro element in the zinc liquid is high more, then cadmia is many more, and the viscosity of zinc liquid just increases, mobile variation, the coating thickening, zinc-iron alloy can form particle attached to workpiece surface, has influenced the surface quality of zinc coating.
At the surperficial mass defect such as particle that occurs of zinc liquid iron-holder height, mobile poor, plating piece, be badly in need of a kind of simple and effective method to handle the cadmia that suspends in the zinc liquid, with the purification of assurance zinc liquid and the raising of galvanizing production quality.
In recent years, utilize electromagnetic separation technology to remove the application of having succeeded of cadmia in the liquid metal.Electromagnetic separation technology possesses advantages such as pollution-free and efficient, utilize this technology can separate the very little impurity of granularity in the liquid metal, as application number is that to relate to a kind of electromagnetic cleaning means for hot galvanizing liquid and application number be that device that 200710041702.4 Chinese invention patent relates to cadmia in a kind of dual-channel electromagnetic heat of dissociation galvanizing flux can be removed the outstanding slag in the zinc liquid for 200510028881.9 Chinese invention patent, but it is a kind of equipment configuration, not only investment is big, operation inconvenience, and use range has certain limitation.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of Zinc liquid suspension treatment agent for hot galvanizing that can dispel the suspended impurity in the zinc liquid, the content that reduces iron ion in the zinc liquid, raising zinc liquid flowability effectively.
For achieving the above object, Zinc liquid suspension treatment agent for hot galvanizing of the present invention, make by following materials of weight proportions:
Foaming agent 25-50;
Metal replacement agent 0-2;
Refining auxiliary agent 7-25;
Protruded packing 15-50.
Above-mentioned foaming agent is at least a in acetic acid, tetracol phenixin, ammonium nitrate, SODIUMNITRATE, saltpetre, salt of wormwood, borax, bicarbonate of ammonia, Sodium tetrafluoroborate, zirconium chloride, ammonium chloride, the magnesiumcarbonate.
Above-mentioned metal replacement agent is at least a in magnesium, aluminium, the 1%-15% aluminium zinc.
Above-mentioned refining auxiliary agent is at least a in sodium aluminum fluoride, fluorite, zinc chloride, the sodium-chlor.
Above-mentioned protruded packing is at least a in vermiculite, wilkinite, bauxitic clay, diatomite, the clay.
Adopt technique scheme, its concrete effect is as follows:
1, this treatment agent is made up of foaming agent, metal replacement agent, refining auxiliary agent and protruded packing, and foaming agent can continue to produce no hydrogen body (bubble) after immersing zinc liquid within a certain period of time, and bubble can adsorb cadmia when floating in zinc liquid.Foaming agent can be by selecting in organism that can produce gas or the inorganic salts, and the product that foaming agent decomposes must be to be not dissolved in zinc, and density is littler and pollution-free to zinc liquid and atmospheric environment than zinc liquid.The selection of foaming agent consumption is based on the amount of generation gas, and gas forming amount is too big, and the boiling of zinc liquid is too violent, and too little boiling degree is not enough, so its content is chosen between 25%～50%.
2, the metal replacement agent can be reacted with the iron in the zinc liquid, generates the proportion similar intermetallic compound littler than zinc, and intermetallicization and thing also are adsorbed on bubble surface and form scum silica frost (face slag); If metal replacement agent add-on is too high, will influence the composition of zinc liquid, so its content is chosen between 0%～2%.
3, the refining auxiliary agent can promote the iron reaction in metal replacement agent and the zinc liquid; Can from compounds such as sodium aluminum fluoride, fluorite, zinc chloride, sodium-chlor, select.Refining auxiliary agent scope has directly influenced the reactivity worth of treatment agent, so its content is chosen in 7%～25%.
4, protruded packing also can adsorb in the zinc liquid suspended particle and on float to zinc liquid surface, formation face slag, it has guaranteed that on the one hand impurity is adsorbed, and has certain cementability when having guaranteed the scavenging agent compacting on the other hand, so its content is chosen between 15%～50%.
5, being used in combination by above-mentioned treatment agent, the metal replacement agent is under the effect of refining auxiliary agent, in the time of with iron replacement(metathesis)reaction in the zinc liquid, the cadmia in the protruded packing absorption zinc liquid and with bubble floating on liquid level, can dispel the suspended impurity in the zinc liquid effectively, efficiently reach 80%, reduce the content of iron ion in the zinc liquid, improve the flowability of zinc liquid, eliminate quality problems such as plating piece surface cord, make the plating piece product surface smooth, reduced galvanizing production reconditioning workload.
In addition, the present invention provides a kind of preparation method of Zinc liquid suspension treatment agent for hot galvanizing simultaneously, and this method is after described raw material is chosen, and with solid mixer mixing, becomes piece with briquetting press.
As the improvement of aforesaid method, behind solid mixer mixing, add binding agent and even, become piece with briquetting press.
As the further improvement of aforesaid method, the weight proportion of described binding agent is 0-2.
Above-mentioned binding agent is at least a in water or the agent of vinylformic acid gluing.
By this method, the raw material compound stalk forming after can utilizing briquetting press with mixing also can add binding agent in the raw material behind mixing, so that the viscosity of raw material increases, more helps the one-tenth formation of lots of raw material.This method is simple and practical.
Embodiment
Below in conjunction with specific embodiment the present invention is done further to describe in detail:
Embodiment one:
Raw material is chosen: choose raw material and be respectively by weight ratio:
Ammonium nitrate 40
Aluminium powder 1
Fluorite 19
Wilkinite 40
The preparation method: with the listed abundant mixing of material use solid mixer, and to add weight proportion be that 2 acrylic acid adhesive stirred 30 minutes as caking agent, is pressed into blocks with block-making machine and is this product.
Embodiment two:
Raw material is chosen: choose raw material and be respectively by weight ratio:
SODIUMNITRATE 25
Zinc chloride 8
Ammonium chloride 10
Fluorite 7
Wilkinite 50
The preparation method: basic identical with embodiment one, difference is that the binding agent that adds is a water.
Embodiment three:
Raw material is chosen: choose raw material and be respectively by weight ratio:
Tetracol phenixin 28
1%-15% aluminium zinc powder 2
Zinc chloride 22
Bauxitic clay 48
The preparation method: basic identical with embodiment one, difference is not add binding agent.
Embodiment four
Raw material is chosen: choose raw material and be respectively by weight ratio:
Acetic acid 26
Salt of wormwood 20
Magnesium 0.5
1%-15% aluminium zinc 1
Sodium-chlor 26
Diatomite 25
The preparation method: basic identical with embodiment one, difference is that the weight proportion of the binding agent that adds is 0.5.
In addition, there is multiple array mode in the present invention on raw material is chosen, and is not limited to technical scheme cited in the specific embodiment, and it is all in protection scope of the present invention.
Claims (5)
1. Zinc liquid suspension treatment agent for hot galvanizing is characterized in that being made by following raw materials by weight percent:
Foaming agent 25%-50%;
Metal replacement agent 0-2%;
Refining auxiliary agent 7%-25%;
Protruded packing 25%-50%;
Described foaming agent is at least a in acetic acid, tetracol phenixin, ammonium nitrate, SODIUMNITRATE, saltpetre, salt of wormwood, borax, bicarbonate of ammonia, Sodium tetrafluoroborate, zirconium chloride, ammonium chloride, the magnesiumcarbonate;
Described metal replacement agent is at least a in magnesium, aluminium, the 1%-15% aluminium zinc;
Described refining auxiliary agent is at least a in sodium aluminum fluoride, fluorite, zinc chloride, the sodium-chlor;
Described protruded packing is at least a in vermiculite, wilkinite, bauxitic clay, diatomite, the clay.
2. the preparation method of Zinc liquid suspension treatment agent for hot galvanizing according to claim 1, it is characterized in that: this method is after described raw material is chosen, and with solid mixer mixing, becomes piece with briquetting press.
3. the preparation method of Zinc liquid suspension treatment agent for hot galvanizing according to claim 2 is characterized in that: behind solid mixer mixing, add binding agent and even, become piece with briquetting press.
4. the preparation method of Zinc liquid suspension treatment agent for hot galvanizing according to claim 3 is characterized in that: the weight percent of described binding agent is for greater than zero and be not more than 2%.
5. according to the preparation method of claim 3 or 4 described Zinc liquid suspension treatment agent for hot galvanizing, it is characterized in that: described binding agent is at least a in water or the agent of vinylformic acid gluing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100746105A CN101560607B (en) | 2009-06-03 | 2009-06-03 | Zinc liquid suspension treatment agent for hot galvanizing and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100746105A CN101560607B (en) | 2009-06-03 | 2009-06-03 | Zinc liquid suspension treatment agent for hot galvanizing and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN101560607A CN101560607A (en) | 2009-10-21 |
| CN101560607B true CN101560607B (en) | 2010-08-11 |
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| CN2009100746105A Expired - Fee Related CN101560607B (en) | 2009-06-03 | 2009-06-03 | Zinc liquid suspension treatment agent for hot galvanizing and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972843A (en) * | 2010-09-30 | 2011-02-16 | 昆明理工大学 | Environment-friendly slagging agent for casting zinc and zinc alloys and use method thereof |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418062A (en) * | 2011-11-30 | 2012-04-18 | 株洲创林合金有限责任公司 | Zinc liquid cleanser |
| CN103014397B (en) * | 2012-12-05 | 2015-03-04 | 安徽徽铝铝业有限公司 | Preparation method of diatomite-doped refining agent used for smelting aluminium alloy sections |
| CN103060736A (en) * | 2012-12-29 | 2013-04-24 | 江苏飞拓界面工程科技有限公司 | Hot zinc galvanizing liquid purifying agent |
| CN107557710B (en) * | 2017-09-01 | 2020-03-13 | 河北工业大学 | Hot galvanizing composite zinc liquid iron remover and use method thereof |
| CN112662890A (en) * | 2020-12-09 | 2021-04-16 | 攀枝花钢城集团有限公司 | Zinc slag recycling method |
| CN113088854B (en) * | 2021-03-29 | 2023-03-31 | 浙江航峰铁塔有限公司 | Zinc pot purification method in hot galvanizing production |
| CN118241141B (en) * | 2024-05-06 | 2024-09-24 | 湖南昱林新材料科技有限公司 | Zinc liquid purifying agent for hot galvanizing and preparation and application methods thereof |
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2009
- 2009-06-03 CN CN2009100746105A patent/CN101560607B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972843A (en) * | 2010-09-30 | 2011-02-16 | 昆明理工大学 | Environment-friendly slagging agent for casting zinc and zinc alloys and use method thereof |
| CN101972843B (en) * | 2010-09-30 | 2012-10-31 | 昆明理工大学 | A kind of slagging agent for environment-friendly zinc and zinc alloy melting and casting and using method thereof |
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| CN101560607A (en) | 2009-10-21 |
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