CN1011306B - Filter of purifying magnesium oxide foam pottery and process for making same - Google Patents
Filter of purifying magnesium oxide foam pottery and process for making sameInfo
- Publication number
- CN1011306B CN1011306B CN 87102516 CN87102516A CN1011306B CN 1011306 B CN1011306 B CN 1011306B CN 87102516 CN87102516 CN 87102516 CN 87102516 A CN87102516 A CN 87102516A CN 1011306 B CN1011306 B CN 1011306B
- Authority
- CN
- China
- Prior art keywords
- filter
- magnesium oxide
- present
- purifying
- strainer
- 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.)
- Expired
Links
Abstract
The present invention relates to a filter for purifying alloy liquid, and a preparation process thereof. The filter of the present invention solves the technological problem that magnesium alloy and high-temperature alloy containing active elements can not be filtered by filters of the prior art. The filter of the present invention is made of pure magnesium oxide, and novolaks are used as binding agents; the proportion of the pure magnesium oxide to the novolaks is 1: 0.2 to 0.5; the pure magnesium oxide and the binding agents are made into coal water slurry which are dipped and coated on foam; then, the foam is dries, calcined and sintered at high temperature. The filter of the present invention has obvious effect on purifying the alloy liquid, and has obvious economic benefit.
Description
The present invention relates to a kind of strainer that alloy liquid purifies usefulness that is used for.
As everyone knows, in Metal smelting,, often adopt strainer to filter alloy liquid for obtaining the purified alloy liquid of quality.The current strainer that adopts both at home and abroad extensively all with material such as aluminum oxide, quartz, zirconium white and mineral binder bond be modulated into slurries with the appropriate means dip-coating on porous plastics through heating, drying, sinter-hardened and make strainer.
This strainer can filter general aluminium alloy, copper alloy, cast iron, cast steel etc.
For example: the strainer that the U.S. " Astro Met Associates " company and " Fosece " company produce.Referring to United State Patent4,024,212 patent documentations.
But this class strainer all is higher than magnesium oxide because of free energy of formation quartzy, aluminum oxide, so when alloy liquid filters, following reaction will take place:
And make the strainer dissolving, thereby lose cleaning action.Analogue owing to contain active element, also can take place to some superalloy in pollution as a same reason that also caused simultaneously alloy liquid, for example hafnium etc.
Thereby making general aluminum oxide-quartzy class A foam A porcelain filter, the application in the purification techniques of magnesium alloy and some superalloys is subjected to certain limitation.
Seek a kind ofly not only to be applicable to general alloy liquid, and can be applicable to that the strainer that ideal that magnesium alloy and some contain the superalloy liquid of active element purifies usefulness is a purpose of the present invention.
The present invention has on the make selected for use pure zirconia magnesium to replace aluminum oxide-quartzy class material, and replaces mineral binder bond and make slurries with phenolic varnish.Adopt certain dipping process with the slurries dip-coating on porous plastics, drying sclerosis, sintering forms.
Strainer of the present invention has better chemical stability than aluminum oxide-quartzy class A foam A porcelain filter commonly used.Use this strainer, both can avoid in magnesium alloy, dissolving, also can not pollute the superalloy liquid that contains active element.
Adopting phenolic varnish to make binding agent can avoid when cleaning high-temp alloy liquid because of can not high temperature resistantly losing efficacy.
Therefore, adopt strainer of the present invention can improve the depuration quality of alloy liquid.It is the desirable strainer that is used to filter magnesium alloy and superalloy.
For example: be not more than the chemical pure magnesium oxide powder of 200 purposes through maturation process with granularity, the ratio that adds 20～50 gram phenolic varnish in 100 gram powders is made into uniform sizing material.With porosity is 10～20 hole/inches, polyurethane foam plastic with suitable size of favorable elasticity immerses in the slurries through repeatedly kneadding, discharge the gas in the plastic body, after treating that it soaks into fully, extrude unnecessary slurries, make on the foams fiber yarn evenly to apply one deck slurry and do not have the hole of obstruction phenomenon.Seasoning 24-48 hour,, after the sclerosis to be dried, put into stove 80 ℃ of bakings 2 hours.Be warming up to 300 ℃ of insulations 1 hour, and then be rapidly heated to 1300～1800 ℃ of insulations 1 hour, furnace cooling.Can obtain filter of purifying magnesium oxide foam pottery.
Claims (4)
1, a kind of ceramic foam filter that is used for the purification of alloy liquid, feature of the present invention is that the foamed ceramics in the strainer is made of purifying magnesium oxide foam pottery.
2, a kind of reparation technology of filter of purifying magnesium oxide foam pottery, feature of the present invention is:
A. make raw material with pure zirconia magnesium, phenolic varnish are made into slurry as binding agent,
B. make the carrier of above-mentioned slurries with polyurethane foam plastic,
C. through seasoning, oven dry, high temperature sintering forms; Sintering temperature is 1300～1800 ℃.
3, the reparation technology of strainer according to claim 2 is characterized in that, the proportioning of magnesium oxide and phenolic varnish is 1: 0.20～0.50.
4, the reparation technology of strainer according to claim 2 is characterized in that, the porosity of used polyurethane foam plastic is 10～20 hole/inches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102516 CN1011306B (en) | 1987-04-01 | 1987-04-01 | Filter of purifying magnesium oxide foam pottery and process for making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102516 CN1011306B (en) | 1987-04-01 | 1987-04-01 | Filter of purifying magnesium oxide foam pottery and process for making same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87102516A CN87102516A (en) | 1988-11-23 |
| CN1011306B true CN1011306B (en) | 1991-01-23 |
Family
ID=4813993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87102516 Expired CN1011306B (en) | 1987-04-01 | 1987-04-01 | Filter of purifying magnesium oxide foam pottery and process for making same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1011306B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063410C (en) * | 1996-10-30 | 2001-03-21 | 大连理工大学 | Method of preparing foamed ceramic material by self-overgrowth high-temp. synthesis control |
| CN1063411C (en) * | 1996-10-30 | 2001-03-21 | 大连理工大学 | Method of preparing (ALxOx+Tibx) foamed ceramic filter by self-overgrowth high-temp. synthesis control |
| CN102031384B (en) * | 2010-11-19 | 2012-08-29 | 江苏大学 | Method for purifying magnesium alloy melt |
| CN108484182B (en) | 2018-04-08 | 2020-05-01 | 江苏中翼汽车新材料科技有限公司 | Magnesium aluminate spinel reinforced magnesium oxide based foamed ceramic filter synthesized in situ by magnesium oxide whiskers and preparation method thereof |
| CN108439957B (en) | 2018-04-08 | 2020-04-21 | 凤阳爱尔思轻合金精密成型有限公司 | MA-M2T-spinel solid solution reinforced magnesium oxide base foamed ceramic filter and preparation method thereof |
| CN108503378B (en) | 2018-04-08 | 2020-06-05 | 江苏中翼汽车新材料科技有限公司 | Spinel reinforced magnesium oxide base foamed ceramic filter and preparation method thereof |
-
1987
- 1987-04-01 CN CN 87102516 patent/CN1011306B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN87102516A (en) | 1988-11-23 |
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Legal Events
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| 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 |