CN1327964A - Process for purifying and coating on surface of filter by molten aluminium - Google Patents
Process for purifying and coating on surface of filter by molten aluminium Download PDFInfo
- Publication number
- CN1327964A CN1327964A CN01113089A CN01113089A CN1327964A CN 1327964 A CN1327964 A CN 1327964A CN 01113089 A CN01113089 A CN 01113089A CN 01113089 A CN01113089 A CN 01113089A CN 1327964 A CN1327964 A CN 1327964A
- Authority
- CN
- China
- Prior art keywords
- coating
- filter
- strainer
- purifying
- preheating
- 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.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Filtering Materials (AREA)
Abstract
A process for coating on the surface of filter use to purity aluminium melt includes such steps as preheating said filter to 650-700 deg.C at speed lower than 50 deg.C per min, keeping the temp for less than 5 min, loading the coating material in corundum crucible (or other anticorrosion containers), heating it to a temp of 50 deg.C above its smelting point in electric furnace, keeping said temp, immesing said filter in said molten coating material for several min, natural cooling and removing excessive coating material.
Description
What the present invention relates to is a kind of surface coating technology, and particularly a kind of process for purifying and coating on surface of filter by molten aluminium belongs to Metal smelting or coating processes field.
In the production of aluminium and Al-alloy products, it is very important preparing purified melt.Cleaning molten is the key technology that guarantees the aluminum alloy materials metallurgical quality, is the problem of academia and business circles extensive concern.The purpose of purifying aluminium alloy melt mainly is to reduce the hydrogen content in the melt and the content of oxide inclusion.Industry is extensive use of particularly ceramic foam filter of porous filter, and metal melt is carried out filtration, purification, is used to remove the non-metallic inclusion of various size.Because it is simple and easy to usefulness, and is with low cost, the filtration, purification effect is better found broad application.The preparation method of ceramic foam filter is provided as Chinese patent 88101382.But it seems that from present use result the foam filter part that comes with some shortcomings waits to improve, as: can not dehydrogenation; Obtain higher filtration efficiency, remove more tiny nonmetal inclusion, just must use the aperture littler, the strainer that the PPI value is higher causes purification flow rate to reduce, and strainer is very fast blocked, and shorten work-ing life, increases the cleaning molten cost on the contrary.So press for a kind of new porcelain filter of development, this strainer should have such characteristics: the PPI value is less, can obtain bigger purification flow rate, can obtain higher filtration, purification effect simultaneously again.A method that addresses this problem is to apply a coating (flux or activeconstituents) at general porcelain filter surfaces externally and internally, make a kind of compound filter, catch the ability of nonmetal inclusion so that utilize this coating to improve strainer, and make compound filter have the function of dehydrogenation.
The objective of the invention is to overcome deficiency of the prior art, a kind of process for purifying and coating on surface of filter by molten aluminium is provided.
Technical scheme of the present invention and performance are as follows: the present invention applies special flux or the activated coating of one deck at the internal surface of composite ceramics strainer, the flux that uses is general flux or a kind of activeconstituents as nano material that metal melt purifies that be suitable for, and adopts the method for dip-coating to obtain even, complete flux coating at the internal surface of strainer.
The concrete technology of the present invention is as follows:
1, preheating will be carried out the strainer that coating applies be example with the ceramic foam filter that uses in aluminium melt purifying, strainer need be preheating to 650 ℃-700 ℃, generally can carry out in baking oven or in the electric furnace, the preheating speed is below 50 ℃/minute, soaking time is in 5 minutes
2, in corundum crucible (or other corrosion-resistant strong container), place the above-mentioned coated material of q.s, and place electric furnace to be heated to above 50 ℃ of its fusing point, insulation,
3, preheating is good strainer immerses (or part immerses) in the fused coating, leaves standstill and promptly takes out in several minutes, places naturally cooling on the shelf, can remove excess coating material in the strainer by action of gravity, to obtain uniform coating; Perhaps adopt alternate manner to remove unnecessary coating.
Because coated material that uses and the good wetting capacity between the filter-carrier by the method for dip-coating, can obtain even, complete coating on strainer, coat-thickness is controlled in 1-100 micrometer ranges.According to the result of study of in the molten aluminium filtration, purification, using this composite ceramics strainer, find that the use floating coat can be owing to washing away of melt do not caused loss, therefore contaminated melt confirms this coating stable existence in the filtration, purification process.
Strainer as coated carrier can be the strainer of various potteries and refractory materials matter, can be core pattern straight hole strainer, also can be ceramic foam filter, or the bonding porcelain filter etc.The composite ceramics strainer that uses this kind to have the flux coating can obtain general better filtration, purification effect of strainer and operating procedure performance.For setting up the material that coating applies can be any flux (or material of other type) that metal melt purifies that is suitable for, as KCl: NaCl=1: and 1 omnipotent flux, or added Na
3AlF
6, CaF
2With the flux JDN-I of rare earth isoreactivity composition, also can be nano material.But coated material must meet the following conditions:
1, enough well soak into Filters mass-energy, do not soak into metal melt to be filtered, perhaps a little less than the wetting capacity,
2, the fusing point of this coating must be lower than the temperature of fusion of wanting filtering metal melt.
Below further introduce inventive embodiments:
Embodiment 1:
In baking oven or in the electric furnace preheating to carry out the 20PPI ceramic foam filter that coating applies (50 * 50 * 25mm) to 650 ℃-700 ℃, the preheating speed can not surpass 50 ℃/minute, soaking time was not less than 5 minutes.(place 100g flux (KCl: NaCl=1: 1 omnipotent flux), and place electric furnace to be heated to above 50 ℃ of its fusing point, be incubated 5 minutes among the Φ 100 * 100mm) at corundum crucible.The strainer that preheating is good immerses in the flux, leaves standstill taking-up in 5 minutes, places naturally cooling on the shelf, removes unnecessary flux in the strainer by action of gravity, obtains uniform coating, and coat-thickness is about 50 microns.
Embodiment 2:
In baking oven or in the electric furnace preheating to carry out the 10PPI ceramic foam filter that coating applies (50 * 50 * 10mm) to 650 ℃-700 ℃, the preheating speed can not surpass 50 ℃/minute, soaking time was not less than 5 minutes.Corundum crucible (place among the Φ 100 * 100mm) 50g flux (KCl: NaCl=1: 1 omnipotent flux, add CaF again
2As activeconstituents, change the surface properties of liquid flux), and place electric furnace to be heated to above 50 ℃ of its fusing point, be incubated 5 minutes.The strainer that preheating is good immerses in the flux, leaves standstill taking-up in 5 minutes, places naturally cooling on the shelf, removes unnecessary flux in the strainer by action of gravity, obtains uniform coating, and coat-thickness is about 50 microns.
Embodiment 3:
In baking oven or in the electric furnace preheating to carry out the 10PPI ceramic foam filter that coating applies (50 * 50 * 10mm) to 650 ℃-700 ℃, the preheating speed can not surpass 50 ℃/minute, soaking time was not less than 5 minutes.Corundum crucible (place among the Φ 100 * 100mm) 50gJDN-I flux (KCl: NaCl=1: 1 omnipotent flux, add CaF again
2And LaF
3As activeconstituents), and place electric furnace to be heated to above 50 ℃ of its fusing point, be incubated 5 minutes.The strainer that preheating is good immerses in the flux, leaves standstill taking-up in 5 minutes, places naturally cooling on the shelf, removes unnecessary flux in the strainer by action of gravity, obtains uniform coating, and coat-thickness is about 50 microns.
The present inventor has substantive distinguishing features and marked improvement, adopts the ceramic filter of different ppi to apply different Coating, be used for the purification of aluminum melt, can reaching hydrogen content fully, to drop to 0.08ml/100Al following and real Now remove the above nonmetal inclusion of 10 μ m fully, the following nonmetal inclusion content of 10 μ m is lower than 0.02% Target. The face coat of complex filter and filter-carrier strong bonded, stable existence. Use this kind multiple Close filter metal bath is carried out filtration, purification, can obtain the better filtration, purification effect of general filter Really.
Claims (3)
1, a kind of process for purifying and coating on surface of filter by molten aluminium, it is characterized in that process for purifying and coating on surface of filter by molten aluminium (1) need be preheating to strainer 650 ℃-700 ℃, the preheating speed is below 50 ℃/minute, soaking time is in 5 minutes, (2) the above-mentioned coated material of placement q.s in corundum crucible (or other corrosion-resistant strong container), and place electric furnace to be heated to above 50 ℃ of its fusing point, insulation, (3) preheating is good strainer immerses (or part immerses) in the fused coating, leave standstill and promptly took out in several minutes, naturally cooling is removed excess coating material in the strainer.
2, this process for purifying and coating on surface of filter by molten aluminium according to claim 1, its feature is that also coat-thickness is controlled in 1-100 micrometer ranges.
3, this process for purifying and coating on surface of filter by molten aluminium according to claim 1, its feature is that also coated material must meet the following conditions: (1) is enough well soaked into Filters mass-energy, and the fusing point of (2) this coating must be lower than the temperature of fusion of wanting filtering metal melt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB01113089XA CN1182077C (en) | 2001-06-07 | 2001-06-07 | Process for purifying and coating on surface of filter by molten aluminium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB01113089XA CN1182077C (en) | 2001-06-07 | 2001-06-07 | Process for purifying and coating on surface of filter by molten aluminium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1327964A true CN1327964A (en) | 2001-12-26 |
| CN1182077C CN1182077C (en) | 2004-12-29 |
Family
ID=4659832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB01113089XA Expired - Fee Related CN1182077C (en) | 2001-06-07 | 2001-06-07 | Process for purifying and coating on surface of filter by molten aluminium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1182077C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104668495A (en) * | 2014-12-26 | 2015-06-03 | 芜湖市民泰铜业有限责任公司 | Chemical filtering and refining method for nonferrous metal |
| CN108480563A (en) * | 2018-06-06 | 2018-09-04 | 上海魁殊自动化科技有限公司 | Used in aluminium alloy casting plaster mold |
| CN109311764A (en) * | 2016-03-16 | 2019-02-05 | 凯诺斯股份公司 | Reactive explosive, its preparation process based on calcium aluminate and carbon and its purposes for refined metals melt or slag |
| CN110560629A (en) * | 2019-09-20 | 2019-12-13 | 宁波江丰电子材料股份有限公司 | coating for smelting and casting high-purity aluminum and preparation method and application thereof |
-
2001
- 2001-06-07 CN CNB01113089XA patent/CN1182077C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104668495A (en) * | 2014-12-26 | 2015-06-03 | 芜湖市民泰铜业有限责任公司 | Chemical filtering and refining method for nonferrous metal |
| CN104668495B (en) * | 2014-12-26 | 2019-02-15 | 芜湖市民泰铜业有限责任公司 | A kind of chemical filtering method of refining of non-ferrous metal |
| CN109311764A (en) * | 2016-03-16 | 2019-02-05 | 凯诺斯股份公司 | Reactive explosive, its preparation process based on calcium aluminate and carbon and its purposes for refined metals melt or slag |
| CN108480563A (en) * | 2018-06-06 | 2018-09-04 | 上海魁殊自动化科技有限公司 | Used in aluminium alloy casting plaster mold |
| CN110560629A (en) * | 2019-09-20 | 2019-12-13 | 宁波江丰电子材料股份有限公司 | coating for smelting and casting high-purity aluminum and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1182077C (en) | 2004-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4951427A (en) | Refractory metal oxide coated abrasives and grinding wheels made therefrom | |
| CN100536988C (en) | Aluminium oxide foam ceramic filter | |
| JPS61117182A (en) | Porous ceramic structure | |
| CN1036395A (en) | Antioxidant protective paint for carbon product | |
| CN111906266A (en) | Method for inhibiting rare earth molten steel pouring nozzle from being blocked by pulse current | |
| CN1035835A (en) | Antioxidant protective paint for carbon product | |
| CN104600182B (en) | The preparation method of LED metal substrates ceramic size and LED metal substrates | |
| CN102080165B (en) | Method for preparing zirconium-based amorphous alloy | |
| JP3723753B2 (en) | Method for producing a coating on a fire-resistant component and use of such a coating | |
| CN106011717B (en) | Method for removing zinc slag in hot-dip galvanizing liquid | |
| WO1989008620A1 (en) | Clad precious metal bushing | |
| CN1182077C (en) | Process for purifying and coating on surface of filter by molten aluminium | |
| US7222775B2 (en) | Process for the metallization and/or brazing with a silicon alloy of parts made of an oxide ceramic unable to be wetted by the said alloy | |
| US5104422A (en) | Refractory metal oxide coated abrasives and grinding wheels made therefrom | |
| CN1109722C (en) | High-temp antioxidizing paint | |
| US4708740A (en) | Technique for forming silicon carbide coated porous filters | |
| EP0381179A2 (en) | Process for the electrophoretic deposition of barrier coatings on precious metals | |
| CN104630771B (en) | A kind of method for preparing porous oxide film in metal carrier surface | |
| JPH0446037A (en) | Composition for porous glass | |
| CN1030338C (en) | Method for forming alloyed protection coating on surface of graphite electrode | |
| JPH039074B2 (en) | ||
| JPH0790400A (en) | Filtrating material for molten metal and treatment of molten metal | |
| CN114657517A (en) | Method for strengthening metal protective coating based on high repetition frequency ultrashort pulse laser | |
| CN87102516A (en) | Filter of purifying magnesium oxide foam pottery and reparation technology thereof | |
| US5336294A (en) | Removal of contaminants from molten metals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |