CN1389435A - Coating formula for filtering non-metallic inclusion in aluminium melt - Google Patents
Coating formula for filtering non-metallic inclusion in aluminium melt Download PDFInfo
- Publication number
- CN1389435A CN1389435A CN02111573A CN02111573A CN1389435A CN 1389435 A CN1389435 A CN 1389435A CN 02111573 A CN02111573 A CN 02111573A CN 02111573 A CN02111573 A CN 02111573A CN 1389435 A CN1389435 A CN 1389435A
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- CN
- China
- Prior art keywords
- aluminium melt
- aluminium
- inclusion
- coating
- metallic inclusion
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Filtering Materials (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The formula of coating layer for non-metallic inclusion in the course of filtering aluminium melt is formed from (wt%) Na3PO4 24.84-26.84%, Na2B4O7.10H2O 5.5-6.35%, Na3AlF6 3.2-4% of ZnO 4.56-5.06% and H3BO3 33-36.59%. Said invention reduces the melting temp. of porcelain glaze of new formula, its viscous glass coating layer or flux coating layer can improve the wettability between aluminium melt and ceramic filter to make aluminium melt more easily pass through the ceramic filter with small size and can trap the more fine and smallar inclusion in the aluminium melt.
Description
Technical field: what the present invention relates to is a kind of coating formula that filters non-metallic inclusion, and particularly a kind of coating formula that filters nonmetallic inclusions from aluminum melts belongs to casting field.
Background technology: aluminium is a kind of very active metal, and easy and steam reaction generates hydrogen and oxide inclusion (Al in fusion process
2O
3).The general content of inclusion in fine aluminium and the aluminium alloy is all more than 0.1%, and the size major part of inclusion all is greater than 10 microns.Molten aluminium can the many materials of dissolved corrosion, but some stupaliths can be resisted the corrosion of molten aluminium, as: Al
2O
3, SiC, BN, alkaline earth metal oxide and glass-ceramic (Sialons, sialon) and matrix material-silicon nitride a beautiful gem green stone type glass-ceramic alcohol.Normal silicate glass but can not be resisted the corrosion of molten aluminium, and glass ingredient will enter in the molten aluminium, and this vitreous coating on porcelain filter, can be polluted molten aluminium when filtering.The applicant has applied for patent on January 29th, 2002, application number is: 02110683.5, name is called: be coated on that anti-aluminium melts body corrosive porcelain You on the ceramic filter medium, the viscosity Ci You of the synthetic a kind of prevent corrosion of aluminium melt of this technology, but its synthesis temperature higher relatively (740 ℃), will improve filtration temperature during filtration, the fusion of Shi Ci You has viscosity, utilizes the porcelain filter coating to catch non-metallic inclusion in the molten aluminium.In original formulation, add Al
2O
3And Mg
2(OH)
2CO
3Be in order to increase porcelain You viscosity, these two kinds of materials can be in molten aluminium generation chemical reaction yet simultaneously, but these two kinds of materials all are that fusing point is than higher material, even add the melt temperature that a spot of two kinds of materials also can be raised the porcelain You.The aluminium fusing point is 660 ℃, when the aluminum filtration melt, temperature must reach Shi Ci You fusion (〉=720 ℃), can make viscosity Ci You on the ceramic grain surface catch non-metallic inclusion in the molten aluminium like this, this in addition Ci You composition is more, can increase cost to a certain extent.
Summary of the invention and concrete ten thousand formulas of implementing: the present invention is directed to the deficiencies in the prior art and defective, a kind of coating formula that filters nonmetallic inclusions from aluminum melts is provided, problem at the original formulation existence, novel some compositions of Ci You formula adjustment, reduce the synthesis temperature of Ci You, make it less than 700 ℃ the time, good viscosity just be arranged, have simultaneously and can resist the molten aluminium corrosion, thereby reach the purpose of efficient impurity removal.The concrete weight percent of its component of the present invention is: Na
3PO
4: 24.84-26.84%, Na
2B
4O
710H
2O:5.5-6.35%, Na
3AlF
6: 3.2-4%, CaCO
3: 1.0-2.3%, K
2CO
3: 4-6.29%, AlPO
4: 19-20%, ZnO:4.56-5.06%, H
3BO
3: 33-36.59%.
The frit mixing is placed in the plumbago crucible, and the plumbago crucible that the enamel raw material will be housed is then put the interior fusion of High Temperature Furnaces Heating Apparatus (700 ℃) 3 hours into, takes out plumbago crucible in stove, glass is toppled over out and pulverizes, as being coated in raw material on the porcelain filter.Water is made suspension to the glass of pulverizing, and then porcelain filter is carried out coating, the porcelain filter (comprising foamed ceramics and ceramic particle) that coats glass is put into High Temperature Furnaces Heating Apparatus fire, and glass is sticked on the porcelain filter uniformly.The flux that mixes is placed on fusion in the plumbago crucible, then porcelain filter (or ceramic particle) is immersed in the molten flux, subsequently its removal is got final product.
Original formulation Ci You melt temperature is greater than 740 ℃, and 660 ℃ of the fusing points of aluminium, thus during the aluminum filtration melt temperature must greater than 720 ℃ of Shi Ci You just fusion have viscosity, thereby can catch the inclusion in the molten aluminium.Too high temperature can increase energy consumption, and 700 ℃ of the porcelain You melt temperatures of newly filling a prescription have viscosity at 680 ℃ of porcelain You, uses new prescription can make filtration temperature reduce about 30 ℃ like this.This new prescription porcelain You is coated on the ceramic grain surface, under action of centrifugal force, can makes the coating ceramic strainer under the less situation in aperture, catch inclusion more tiny in the molten aluminium.
The present invention has substantive distinguishing features and marked improvement, the present invention has reduced the melt temperature of new prescription Ci You, viscous glass coating or flux coating can be improved the wettability between molten aluminium and the ceramic filter, make molten aluminium easier, catch inclusion more tiny in the molten aluminium by the less porcelain filter of size.
Provide following three embodiment in conjunction with content of the present invention:
Sample (heavy Na
3PO
4Na
2B
4O
7Na
3AlF
6CaCO
3K
2CO
3AlPO
4ZnO H
3BO
3
Amount percentage 10H
2O
Than)
1???????24.84????????6.35??????????3.2???????2.3????6.29???????19????5.06?????33
2???????25.84????????6.35??????????3.2???????2??????4??????????19????5.06?????36.59
3???????26.84????????5.5???????????4?????????1.0????4??????????20????4.56?????35.1
With 10 kilograms of aluminium ingots, be placed on fusing in the plumbago crucible, the molten aluminium with fusing pours in the heating whizzer then, and the effect of the centrifugal deep-bed filtration molten aluminium of coating ceramic strainer is as follows:
| Embodiment | Filtration temperature ℃ | Centrifugal pressure | Centrifuge speed | Dust removal rate (%) |
| 1. coating ceramic particle (100 μ m) | ????720 | ?0.08MP | ????1000 | ????96 |
| 2. coating ceramic particle (300 μ m) | ????720 | ?0.08MP | ????1000 | ????92 |
| 3. coating ceramic particle (500 μ m) | ????720 | ?0.08MP | ????1000 | ????90 |
Claims (1)
1, a kind of coating formula that filters nonmetallic inclusions from aluminum melts is characterized in that the concrete weight percent of its component is: Na
3PO
4: 24.84-26.84%, Na
2B
4O
710H
2O:5.5-6.35%, Na
3AlF
6: 3.2-4%, CaCO
3: 1.0-2.3%, K
2CO
3: 4-6.29%, AlPO
4: 19-20%, ZnO:4.56-5.06%, H
3BO
3: 33-36.59%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021115737A CN1168687C (en) | 2002-04-30 | 2002-04-30 | Coating formula for filtering non-metallic inclusion in aluminium melt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021115737A CN1168687C (en) | 2002-04-30 | 2002-04-30 | Coating formula for filtering non-metallic inclusion in aluminium melt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1389435A true CN1389435A (en) | 2003-01-08 |
| CN1168687C CN1168687C (en) | 2004-09-29 |
Family
ID=4741641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021115737A Expired - Fee Related CN1168687C (en) | 2002-04-30 | 2002-04-30 | Coating formula for filtering non-metallic inclusion in aluminium melt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1168687C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102039387A (en) * | 2010-05-25 | 2011-05-04 | 胡遐秋 | Aluminum bronze QA (Quality Assessment) 110-4-4 thin covering semi-continuous ingot casting technology |
| CN102069147A (en) * | 2011-01-30 | 2011-05-25 | 南昌航空大学 | Method for composite-filtering multiple filter media in aluminum-alloy-melt centrifuge field |
| CN109020566A (en) * | 2018-08-02 | 2018-12-18 | 佛山陵朝新材料有限公司 | A kind of preparation method of the dedicated foamed ceramics of aluminium melting liquid filtrate |
-
2002
- 2002-04-30 CN CNB021115737A patent/CN1168687C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102039387A (en) * | 2010-05-25 | 2011-05-04 | 胡遐秋 | Aluminum bronze QA (Quality Assessment) 110-4-4 thin covering semi-continuous ingot casting technology |
| CN102039387B (en) * | 2010-05-25 | 2013-03-13 | 胡遐秋 | Aluminum bronze QA (Quality Assessment) 110-4-4 thin covering semi-continuous ingot casting technology |
| CN102069147A (en) * | 2011-01-30 | 2011-05-25 | 南昌航空大学 | Method for composite-filtering multiple filter media in aluminum-alloy-melt centrifuge field |
| CN102069147B (en) * | 2011-01-30 | 2013-01-16 | 南昌航空大学 | Method for composite-filtering multiple filter media in aluminum-alloy-melt centrifuge field |
| CN109020566A (en) * | 2018-08-02 | 2018-12-18 | 佛山陵朝新材料有限公司 | A kind of preparation method of the dedicated foamed ceramics of aluminium melting liquid filtrate |
| CN109020566B (en) * | 2018-08-02 | 2021-09-21 | 佛山陵朝新材料有限公司 | Preparation method of special foamed ceramic for filtering aluminum melt |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1168687C (en) | 2004-09-29 |
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