CN107326196A - The method for eliminating black oxide slag inclusion problem in pop can cover material ingot casting - Google Patents
The method for eliminating black oxide slag inclusion problem in pop can cover material ingot casting Download PDFInfo
- Publication number
- CN107326196A CN107326196A CN201710430373.6A CN201710430373A CN107326196A CN 107326196 A CN107326196 A CN 107326196A CN 201710430373 A CN201710430373 A CN 201710430373A CN 107326196 A CN107326196 A CN 107326196A
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- CN
- China
- Prior art keywords
- refining
- cover material
- black oxide
- aluminum
- pop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/064—Obtaining aluminium refining using inert or reactive gases
Abstract
The invention discloses a kind of method for eliminating black oxide slag inclusion problem in pop can cover material ingot casting, pass through the method for preliminary refining, first aluminium liquid is refined in two-maing ladle or in refining furnace, the trace element in aluminium liquid is removed, then aluminium liquid is added together with other raw materials again founding is carried out in smelting furnace；It is higher than 780 DEG C of primary aluminum liquation for temperature, uses with Ar, N2The inert gases such as gas are carrier, are passed through AlF3Method, it is adaptable to Tai Baonei refine, according in raw aluminum liquid per ton add 1kg ratio add AlF3；For 730~780 DEG C of primary aluminum liquation of temperature, use using inert gases such as Ar, N2 gas as carrier, the method for being passed through no sodium particle refining agent, it is adaptable to furnace refining, added according to the ratio that 0.5kg is added in raw aluminum liquid per ton without sodium particle refining agent；Preliminary refining process must be carried out offline, the problem of thoroughly solving black oxide in casting process, for the production of high-magnesium aluminum alloy cover material etc., can effectively reduce production cost, improve added value of product.
Description
Technical field：
The present invention relates to a kind of method for eliminating black oxide slag inclusion problem in pop can cover material ingot casting, add for aluminium is profound
Some micro- method of refining are removed in work fusion-casting process.
Background technology：
With the development of China's aluminum i ndustry, the market rapid expansion of aluminium alloy pop can, therefore, the consumption of aluminium alloy cover material
Increase therewith.But, in the melting and casting process of cover material production, aluminium and its alloy are easily polluted by field trash.And be mingled with
The presence of thing destroys metallic continuity, and has different modulus of elasticity, expansion system between metal body due to being mingled with
, easily there is stress concentration in the sharp corner of constituent phases in number, often the fracture origin as material, source of corrosion.During ironing,
These defects prevent its region plastic deformation, intensity from meeting the minimum requirements of ironing, just cause " disconnected tank ", if lacking
Size is fallen into small, although not resulting in disconnected tank, causing " pin hole ".During the cover processing of downstream Zhi Gai factories, the oxidation to cover material
The requirement of slag inclusion pin hole is extremely harsh, and the pin hole that oxide slag inclusion is caused is inaccurate more than thousand a ten thousandths, and this is for aluminium alloy cover material
Production be one greatly challenge.Aluminium alloy cover material is generally 5052 or 5182 alloys, be containing magnesium and high magnesium alloy, and
The chemical property of magnesium elements is very active, is easily chemically reacted with oxygen and moisture content：Mg+H2O=MgO+H2 、2Mg+O2=
2MgO, also, aluminium, oxygen, three kinds of elements of magnesium can form infusibility " alumina magnesium compound " at high temperature（MgAL2O4）, i.e., it is sharp brilliant
Stone, that is, common black oxide product, the presence of the material is fatal to metallic continuity.
The affinity of oxygen and aluminium is big, and the solid oxide-film of one layer of densification is produced in aluminium alloy smelting（Al2O3）, it is covered in
Aluminium melt surface, prevents its suction hydrogen and further oxidation, this is highly advantageous for the melting of aluminium alloy.And it is micro harmful
Element can destroy this compactness of oxide-film, cause Al, Mg further oxidation, and the tendency for forming spinelle becomes big.
In traditional ingot casting production process, all using online refining（Directly refined in smelting furnace and holding furnace）'s
Method is refined to aluminum melt, by substantial amounts of it was verified that this refinery practice refining effect in the alloy without magnesium
Preferably, and to 5 it is the alloy containing magnesium, it is very poor to removing some micro- action effects due to magnesium elements, cause
There are a large amount of black oxides simultaneously in aluminium liquid surface in online chute, filter box and ingot casting crystallizer in ingot casting production process
Produced with substantial amounts of magnesium aluminate spinel, cause large batch of cover material product rejection.
These contents of electrolytic aluminium mostly come from aluminum oxide, are also to be brought from bauxite, especially Henan area
Bauxite all in more than 700ppm, content is all in more than 35ppm, the up to 55ppm having inside the primary aluminum produced.Import oxygen
These micronutrient levels of change aluminium are generally relatively low, typically in below 70ppm, and the electrolysis aluminium content of production is general in below 10ppm,
But import aluminum oxide is purchased and cost of transportation is very high.
In order to reduce production cost, it is ensured that primary aluminum quality is to meet the quality requirement of cover material production, and increase product is added
Value, enterprise economic benefit, the requirement for aluminium intensive processing to product quality is targetedly removed in primary aluminum aluminium liquid
These trace elements, are that the production of cover material lays the first stone, are determined to win.
The content of the invention：
The technical problems to be solved by the invention are：The deficiencies in the prior art are overcome to eliminate the casting of pop can cover material there is provided one kind
The method of black oxide slag inclusion problem in ingot, the method by refining offline can reduce these trace elements in primary aluminum
To below 10ppm, these negative effects of the trace element to aluminum melt quality are thoroughly eliminated, so as to avoid black oxide
Formed, it is adaptable to the production of high-magnesium aluminum alloy cover material.
The present invention is for the technical solution adopted for solving the technical problem；
A kind of method for eliminating black oxide slag inclusion problem in pop can cover material ingot casting, by the method for preliminary refining, first will
Aluminium liquid is refined in two-maing ladle or in refining furnace, the trace element in aluminium liquid is removed, then again by aluminium liquid together with other raw materials
Add together in smelting furnace and carry out founding：
(1) it is higher than 780 DEG C of primary aluminum liquation for temperature, uses with Ar, N2The inert gases such as gas are carrier, are passed through AlF3Side
Method, it is adaptable to which Tai Baonei is refined, AlF is added according to the ratio that 1kg is added in raw aluminum liquid per ton3 ；
(2), for the primary aluminum liquation of 730~780 DEG C of temperature, use using inert gases such as Ar, N2 gas as carrier, be passed through no sodium particle
The method of refining agent, it is adaptable to refine furnace refining, it is smart without sodium particle according to the ratio addition that 0.5kg is added in raw aluminum liquid per ton
Refine agent.
Preliminary refining process must be carried out offline, be prevented effectively from the generation of black oxide.
Described is KCl or AlF without sodium particle refining agent3 。
In the present invention：The technology segment not being described in detail is known technology.
These trace elements in primary aluminum can be reduced to below 10ppm, thoroughly by method of the present invention by refining offline
These negative effects of the trace element to aluminum melt quality are eliminated, so as to avoid the formation of black oxide, it is adaptable to Gao Mei
The production of aluminium alloy cover material.
The present invention not only ensure that the quality requirement of cover material, it is to avoid occur quality accident, reduction production run cost
Effect.And technique is simple, less investment, elimination effect is high, and without any toxic side effect, to environment also without any danger
Evil.
Because Mg elements have inhibitory action to refining effect, preliminary refining process of the present invention must be carried out offline, these micro members
Cellulose content is less than the production of 10ppm refining primary aluminum or aluminium ingot available for cover material, is prevented effectively from the generation of black oxide.
The present invention positive beneficial effect be：
1st, the present invention is directed in high-magnesium aluminum alloy cover material production process, easily occurs a kind of asking for black oxide in aluminum melt
Topic, has invented a kind of process for eliminating black oxide in high magnalium melt, primary aluminum is applied to high-magnesium aluminum alloy cover
The production of material, it is ensured that the qualification rate of finished product.
2nd, the present invention is with low cost, and preliminary refining aluminum feedstock per ton and operating cost are only at 40 yuan or so.
3rd, it is that cover material black oxide effect is obvious that the present invention, which eliminates 5, can effectively ensure that product quality.
4th, the present invention is simple to operate, and these trace elements in primary aluminum substantially, can be reduced to by preliminary refining effect
Below 10ppm, thoroughly eliminates these negative effects of the trace element to aluminum melt quality, so as to avoid the shape of black oxide
Into.
5th, the present invention does not have toxic side effect to primary aluminum and environment, uses nontoxic, smokeless refining agent, it is not necessary to special to throw
Enter environmental protection equipment.
6th, the present invention is offline refining, and the requirement for aluminium intensive processing to product quality targetedly removes primary aluminum
Hazardous trace elements in aluminium liquid, meet the demand of cover material product quality.
7th, effect of the present invention substantially, it is per ton relative to the primary aluminum that rafifinal production technology and import special aluminium oxide are produced into
Originally 400~800 yuan can be reduced, economic benefit is very considerable.
Embodiment：
The present invention is made further explanation and description with reference to specific embodiment：
Embodiment：A kind of method for eliminating black oxide slag inclusion problem in pop can cover material ingot casting, it is characterised in that：Pass through
The method of preliminary refining, aluminium liquid is first refined, remove the trace element in aluminium liquid in two-maing ladle or in refining furnace, then again will
Aluminium liquid adds together with other raw materials and founding is carried out in smelting furnace：
(1) it is higher than 780 DEG C of primary aluminum liquation for temperature, uses with Ar, N2The inert gases such as gas are carrier, are passed through AlF3Side
Method, eliminates the hazardous trace elements for causing black oxide in primary aluminum, it is adaptable to which Tai Baonei is refined, according in raw aluminum liquid per ton
Add 1kg ratio addition AlF3 ；
(2), for the primary aluminum liquation of 730~780 DEG C of temperature, use using inert gases such as Ar, N2 gas as carrier, be passed through no sodium particle
The method of refining agent, eliminates the hazardous trace elements in primary aluminum, it is adaptable to furnace refining, is added according in raw aluminum liquid per ton
0.5kg ratio is added without sodium particle refining agent.
Preliminary refining process must be carried out offline, be prevented effectively from the generation of black oxide, this hazardous trace elements content
Refining primary aluminum or aluminium ingot less than 10ppm can be used for the production of cover material.
Described is KCl or AlF without sodium particle refining agent3 。
In the present invention：The technology segment not being described in detail is known technology.
Claims (3)
1. a kind of method for eliminating black oxide slag inclusion problem in pop can cover material ingot casting, it is characterised in that：Pass through pre- essence
The method of refining, aluminium liquid is first refined, the trace element in aluminium liquid is removed, then again by aluminium liquid in two-maing ladle or in refining furnace
Added together with other raw materials and founding is carried out in smelting furnace：
(1) it is higher than 780 DEG C of primary aluminum liquation for temperature, uses with Ar, N2The inert gases such as gas are carrier, are passed through AlF3Side
Method, it is adaptable to which Tai Baonei is refined, AlF is added according to the ratio that 1kg is added in raw aluminum liquid per ton3 ；
(2), for the primary aluminum liquation of 730~780 DEG C of temperature, use using inert gases such as Ar, N2 gas as carrier, be passed through no sodium particle
The method of refining agent, it is adaptable to refine furnace refining, it is smart without sodium particle according to the ratio addition that 0.5kg is added in raw aluminum liquid per ton
Refine agent.
2. the method according to claim 1 for eliminating black oxide slag inclusion problem in pop can cover material ingot casting, it is special
Levy and be：Preliminary refining process must be carried out offline, be prevented effectively from the generation of black oxide.
3. the method according to claim 1 for eliminating black oxide slag inclusion problem in pop can cover material ingot casting, it is special
Levy and be：Described is KCl or AlF without sodium particle refining agent3 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710430373.6A CN107326196A (en) | 2017-06-09 | 2017-06-09 | The method for eliminating black oxide slag inclusion problem in pop can cover material ingot casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710430373.6A CN107326196A (en) | 2017-06-09 | 2017-06-09 | The method for eliminating black oxide slag inclusion problem in pop can cover material ingot casting |
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| CN201710430373.6A Pending CN107326196A (en) | 2017-06-09 | 2017-06-09 | The method for eliminating black oxide slag inclusion problem in pop can cover material ingot casting |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762492A (en) * | 2015-04-14 | 2015-07-08 | 河南中孚实业股份有限公司 | Method for removing trace elements out of molten primary aluminium |
| CN105648237A (en) * | 2016-03-07 | 2016-06-08 | 新疆大学 | Electrolytic aluminum liquid impurity removing device and method |
| CN106222445A (en) * | 2016-09-29 | 2016-12-14 | 青海高原有色金属研发有限公司 | A kind of aluminum anodizing equipment and aluminum anodizing technique |
-
2017
- 2017-06-09 CN CN201710430373.6A patent/CN107326196A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762492A (en) * | 2015-04-14 | 2015-07-08 | 河南中孚实业股份有限公司 | Method for removing trace elements out of molten primary aluminium |
| CN105648237A (en) * | 2016-03-07 | 2016-06-08 | 新疆大学 | Electrolytic aluminum liquid impurity removing device and method |
| CN106222445A (en) * | 2016-09-29 | 2016-12-14 | 青海高原有色金属研发有限公司 | A kind of aluminum anodizing equipment and aluminum anodizing technique |
Non-Patent Citations (2)
| Title |
|---|
| 官可湘 等: "铝及铝合金熔体净化剂研究进展", 《化学世界》 * |
| 石宝东 等: "铝合金熔体净化工艺的研究进展", 《材料导报：综述篇》 * |
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Application publication date: 20171107 |