CN101343694A - Dezincing smelting method for waste mixed aluminum alloy containing zinc - Google Patents
Dezincing smelting method for waste mixed aluminum alloy containing zinc Download PDFInfo
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- CN101343694A CN101343694A CNA200810058815XA CN200810058815A CN101343694A CN 101343694 A CN101343694 A CN 101343694A CN A200810058815X A CNA200810058815X A CN A200810058815XA CN 200810058815 A CN200810058815 A CN 200810058815A CN 101343694 A CN101343694 A CN 101343694A
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- Prior art keywords
- zinc
- aluminium
- aluminum
- aluminium alloy
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- 239000011701 zinc Substances 0.000 title claims abstract description 55
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 19
- 238000003723 Smelting Methods 0.000 title claims abstract description 11
- 239000002699 waste material Substances 0.000 title 1
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000001257 hydrogen Substances 0.000 claims abstract description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000004821 distillation Methods 0.000 claims abstract description 6
- 239000004411 aluminium Substances 0.000 claims description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 241000209456 Plumbago Species 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000007670 refining Methods 0.000 abstract description 10
- 238000007872 degassing Methods 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 7
- 239000007789 gas Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005292 vacuum distillation Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a dezincification smelting method for zinc-bearing scrap aluminum alloy. Zinc-bearing scrap aluminum is taken as a raw material, and a vacuum distillation method is adopted, the distillation temperature is controlled within 700 DEG C to 800 DEG C, the vacuum degree is 15 Pa to 30 Pa, the distillation time is controlled at 30 min to 50 min, aluminum with less than 0.1 percent of zinc and the zinc with less than 0.1 percent of aluminum are obtained, and recovery rates respectively reach above 98 percent and 97 percent. Meanwhile, the degassing refining and the demetalization impurity refining are combined, and gas impurities and Zn impurities are removed just for once. The hydrogen content of the aluminum alloy can be decreased to 0.06 cm<2>/100 g from 0.42 cm<2>/100 g.
Description
One, technical field
The present invention relates to a kind of dezincify smelting process that contains the useless assorted aluminium alloy of zinc, belong to a kind of Non-ferrous Metallurgy method.
Two, background technology
The situation that present China bauxite resource product lacks has been alleviated in secondary aluminum industry greatly.Secondary aluminum industry is raw material with useless assorted aluminium, and zinc content wherein generally is not more than 20%.Contain the useless assorted aluminium dezincify purified tradition smelting process of zinc and generally take oxidation refining method.This method is by means of selective oxidation, oxygen affinity is generated than the big impurity of aluminium that oxide compound changes in the slag and and melt extraction.Useless in process of production assorted aluminium alloy melt needs covering flux usually.The add-on of covering flux is 20%～40% of an aluminium scrap.The production temperature is generally at 1000 ℃～1100 ℃.The casting yield of aluminium is 84～86%.There is certain waste gas to produce in the production process.Simultaneously owing to contain a large amount of gaseous impuritieies in the scrap aluminium alloy, the refining that therefore when refining, need outgas, method commonly used has two kinds of ventilation degassing refining and salt degassing refinings.Feed the refining that outgases of nitrogen, chlorine, hydrogen, its principle is because the hydrogen that is dissolved in the alloy liquid is diffused in the small bubbles that blast gas, thereby causes the degassing.Salt degassing purified cardinal principle is that the salt flux that adds decomposes generation gas under the aluminum alloy melting temperature, the hydrogen that is dissolved in the alloy liquid is diffused in the gas of generation, thereby reaches the purpose of the degassing.
The present invention adopts vacuum low-pressure zinc evaporable method to smelt useless assorted aluminium, and under 700～800 ℃ low temperature, vacuum tightness remains on 15～35Pa, and the zinc content in the aluminium is reduced to below 0.1%, and the rate of recovery of aluminium reaches 98%; And the zinc of evaporation can be reclaimed, the purity that reclaims back zinc is greater than 99.8%, and the rate of recovery of zinc reaches 97%.The aluminium alloy hydrogen content can be from 0.42cm simultaneously
2/ 100g drops to 0.06cm
2/ 100g.Compare with traditional method, the energy consumption of this method is low, and rate of recovery height does not have waste gas to produce environmentally safe in the production process.Because aluminium is difficult for oxidizedly under the vacuum environment, thereby does not need flux to cover, present method makes zinc content and air content in the aluminium alloy all reach requirement by a vacuum distilling Dezincification process and degassing process merging simultaneously.
Three, summary of the invention
The purpose of this invention is to provide a kind of dezincify smelting process that contains the useless assorted aluminium alloy of zinc, to contain the useless assorted aluminium of zinc is raw material, adopt the vacuum distilling method, the control distillation temperature is in 700～800 ℃, vacuum tightness is 15～30Pa, distillation time is 30～50min, obtains aluminium product and zinc product, and the aluminium alloy hydrogen content can be from 0.42cm simultaneously
2/ 100g drops to 0.06cm
2/ 100g.Zinc content in the aluminium product is less than 0.1%, and the rate of recovery reaches 98%; Aluminum content is less than 0.1% in the zinc product, and the rate of recovery reaches 97%.
The technical scheme of invention
Operational path of the present invention: the technological line that the present invention adopts: contain the useless assorted aluminum feedstock → vacuum oven of zinc → volatilization → secondary aluminum and regenerated zinc
The present invention is achieved through the following technical solutions.
To contain the useless assorted aluminum feedstock of zinc and put into plumbago crucible and be placed on vacuum oven, the fusing that heats up, the temperature in the control vacuum oven is 700～800 ℃, pressure is 15～30Pa, tap to tap time 30～50min; Zinc volatilization in vacuum oven, aluminium is non-volatile, the condensation in condenser of evaporable zinc, nonvolatile aluminium is stayed in the plumbago crucible.
The ultimate principle that realization contains the useless assorted aluminium dezincify smelting of zinc is under the low pressure condition, and the ratio of the vapour pressure of zinc and the vapour pressure of aluminium is big.During the low pressure volatilization, aluminium is non-volatile, forms liquid phase; The zinc volatilization forms gas phase, forms liquid after the condensation, thereby aluminium is separated with zinc.Because under the low pressure condition, do not have oxygen and oxidizing atmosphere in the vacuum oven, metal is simple substance, can be not oxidized, simultaneously because the pressure in the stove is 15～30Pa, so metal melt can reach degasifying effect preferably.
Compare advantage and positively effect that the present invention has with known technology
The present invention is a raw material to contain the useless assorted aluminium of zinc, can realize simply and effectively that the smelting of aluminium is purified, and obtains containing zinc less than 0.1% aluminium with contain aluminium less than 0.1% zinc, and the rate of recovery reaches respectively more than 98% and 97%.Simultaneously with degassing refining and demetalization impurities and refining merging in the traditional technology, with gaseous impurities with zinc impurities is disposable removes.
Four, embodiment
Further specify the present invention by the following examples.
Embodiment 1: the main component weight percent that contains the useless assorted aluminum feedstock of zinc is Zn 8.28wt%, and Al 73.28wt% distills 30min respectively in vacuum oven under 700 ℃, 750 ℃ and 800 ℃, opinion pressure is 15～30Pa in the control stove, the aluminium content that obtains in the regenerated zinc is respectively 0.03%, 0.04%, 0.057%, zinc content in the secondary aluminum that obtains is respectively 0.97%, 0.084%, 0.077%, the hydrogen richness in the aluminium alloy that obtains is all at 0.06cm
2Below/the 100g.
Embodiment 2: the main component weight percent that contains the useless assorted aluminum feedstock of zinc is Zn 9.21wt%, and Al 70.31wt% distills in vacuum oven under 30min, 40min and 50min respectively, distillation temperature is controlled under 750 ℃, and keeping the pressure in the stove is 15～30Pa, and the aluminium content that obtains in the regenerated zinc is respectively, 0.022%, 0.027%, 0.079%, the zinc content in the secondary aluminum that obtains is respectively, 0.1%, 0.09%, 0.079%, the hydrogen richness in the aluminium alloy that obtains is all at 0.06cm
2Below/the 100g.
Claims (3)
1, a kind of dezincify smelting process that contains the useless assorted aluminium alloy of zinc, it is characterized in that: will contain the useless assorted aluminum feedstock of zinc and put into plumbago crucible and insert vacuum oven, temperature in the control vacuum oven is 700～800 ℃, pressure is 15～30Pa, tap to tap time 30～50min, the condensation in condenser of evaporable zinc, nonvolatile aluminium is stayed in the plumbago crucible.
2, the dezincify smelting process that contains the useless assorted aluminium alloy of zinc according to claim 1, it is characterized in that: the main component weight percent that contains the useless assorted aluminum feedstock of zinc is Zn 8.28wt%, Al73.28wt%, respectively under 700 ℃, 750 ℃ and 800 ℃, in vacuum oven, distill 30min, the control furnace pressure is 15～30Pa, the aluminium content that obtains in the regenerated zinc is respectively 0.03%, 0.04% and 0.057%, zinc content in the secondary aluminum that obtains is respectively 0.97%, 0.084% and 0.077%, the hydrogen richness in the aluminium alloy is all at 0.06cm
2Below/the 100g.
3, the dezincify smelting process that contains the useless assorted aluminium alloy of zinc according to claim 1, it is characterized in that: the main component weight percent that contains the useless assorted aluminum feedstock of zinc is Zn 9.21wt%, Al70.31wt%, under 30min, 40min and 50min, in vacuum oven, distill respectively, distillation temperature is controlled under 750 ℃, keeping the pressure in the stove is 15～30Pa, the aluminium content that obtains in the regenerated zinc is respectively 0.022%, 0.027% and 0.079%, zinc content in the secondary aluminum that obtains is respectively 0.1%, 0.09% and 0.079%, the hydrogen richness in the aluminium alloy is all at 0.06cm
2Below/the 100g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810058815XA CN101343694A (en) | 2008-08-15 | 2008-08-15 | Dezincing smelting method for waste mixed aluminum alloy containing zinc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810058815XA CN101343694A (en) | 2008-08-15 | 2008-08-15 | Dezincing smelting method for waste mixed aluminum alloy containing zinc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101343694A true CN101343694A (en) | 2009-01-14 |
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|---|---|---|---|
| CNA200810058815XA Pending CN101343694A (en) | 2008-08-15 | 2008-08-15 | Dezincing smelting method for waste mixed aluminum alloy containing zinc |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242278A (en) * | 2011-07-19 | 2011-11-16 | 昆明理工大学 | Method for manufacturing zinc and aluminum iron silicon type deoxidizer in vacuum by utilizing hot-dipping aluminum slag |
| CN104120280A (en) * | 2014-07-31 | 2014-10-29 | 上海交通大学 | Method for removing impurity element zinc out of secondary aluminum melt |
| CN105132698A (en) * | 2015-09-27 | 2015-12-09 | 常州市奥普泰科光电有限公司 | Technology for extracting aluminum and zinc from high-aluminum zinciferous aluminum-zinc residues |
| CN109609779A (en) * | 2019-02-19 | 2019-04-12 | 东北大学 | A method of primary aluminum, which is carried out, using vacuum distillation removes gallium |
| CN114410975A (en) * | 2022-01-25 | 2022-04-29 | 东北大学 | Method for recovering waste aluminum/waste aluminum alloy |
| CN115151664A (en) * | 2019-12-20 | 2022-10-04 | 北欧古苏姆冶金公司 | Method for removing lead from brass |
-
2008
- 2008-08-15 CN CNA200810058815XA patent/CN101343694A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242278A (en) * | 2011-07-19 | 2011-11-16 | 昆明理工大学 | Method for manufacturing zinc and aluminum iron silicon type deoxidizer in vacuum by utilizing hot-dipping aluminum slag |
| CN104120280A (en) * | 2014-07-31 | 2014-10-29 | 上海交通大学 | Method for removing impurity element zinc out of secondary aluminum melt |
| CN105132698A (en) * | 2015-09-27 | 2015-12-09 | 常州市奥普泰科光电有限公司 | Technology for extracting aluminum and zinc from high-aluminum zinciferous aluminum-zinc residues |
| CN109609779A (en) * | 2019-02-19 | 2019-04-12 | 东北大学 | A method of primary aluminum, which is carried out, using vacuum distillation removes gallium |
| CN115151664A (en) * | 2019-12-20 | 2022-10-04 | 北欧古苏姆冶金公司 | Method for removing lead from brass |
| CN114410975A (en) * | 2022-01-25 | 2022-04-29 | 东北大学 | Method for recovering waste aluminum/waste aluminum alloy |
| CN114410975B (en) * | 2022-01-25 | 2023-01-03 | 东北大学 | Method for recovering waste aluminum/waste aluminum alloy |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090114 |