CN102912168A - Aluminum alloy degasifying agent - Google Patents
Aluminum alloy degasifying agent Download PDFInfo
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- CN102912168A CN102912168A CN2012104337725A CN201210433772A CN102912168A CN 102912168 A CN102912168 A CN 102912168A CN 2012104337725 A CN2012104337725 A CN 2012104337725A CN 201210433772 A CN201210433772 A CN 201210433772A CN 102912168 A CN102912168 A CN 102912168A
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- aluminum alloy
- calcium carbonate
- activated carbon
- degasifier
- aluminium alloy
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Abstract
The invention relates to an aluminum alloy degasifying agent which consists of the following components in percentage by weight: 13-15 percent of ammonium carbonate, 22-25 percent of activated carbon and the balance of calcium carbonate. The ammonium carbonate is decomposed at high temperature and reacts with hydrogen and oxygen in an aluminum alloy liquid, and thus gases such as carbon dioxide, nitrogen dioxide, water vapor, ammonia gas and small amount of methane are filtered. Due to the generation of the water vapor, the stirring degree of the melt aluminum alloy liquid is improved and the escape of the gases and the floating of aluminum slag are improved.
Description
Technical field
The invention belongs to the metallic substance casting field, particularly relate to a kind of aluminium alloy degasifier.
Background technology
In the metal casting process, can produce certain gas, and gas is present in intensity and performance that metal inside can have influence on metal.The particularly existence of hydrogen can cause the increase of brittleness even can cause serious consequence.
The application of aluminium alloy in metal field is comparatively extensive, and particularly engine and aerospace field are stricter to the requirement of aluminum alloy casting.In the alloy refining castingprocesses, it is indispensable program that the adding degasifier carries out dehydrogenation.The degasifier dehydrogenation that aluminum current refining and modifying corporate boss will use tetracol phenixin, carbon hexachloride, zinc chloride etc. to make, its dehydrogenation effect is unsatisfactory, and serious hydrogenchloride or chlorine pollution are arranged.Therefore, there are the alternative tetracol phenixin of enterprise's employing Repone K or sodium-chlor, carbon hexachloride, zinc chloride to make degasifier, but because potassium, sodium or zinc can be fused in the aluminium alloy, except the difficult separation of aluminium slag, these elements can affect the performance of aluminium alloy, and the pungent odour generations such as chlorine are also arranged simultaneously.
Now there has been technology to propose, come as degasifier with calcium carbonate etc., substituted the chlorine element with fluorite.Disclose use fluorite, activated carbon, calcium carbonate and salt of wormwood such as Chinese patent CN02135147, wherein, mass percent is: fluorite 18-20.5%; Activated carbon 20-21%; Salt of wormwood 18-23%, all the other are calcium carbonate.This technology mainly be utilize in the fluorite fluorine with the synthetic hydrogen fluoride of hydrogen and the stirring by carbonic acid gas in dehydrogenation, the aluminium slag taken to aluminium liquid above.Effect is than adopting effective a lot of of chloride degasifier.But this technology also has obvious defective, and hydrogen fluoride is to have extremely strong toxicity and corrosive compound, and explosion hazard is arranged.In the aluminium alloy treating process, can't accomplish to seal fully, larger to the murder by poisoning of human body and environment.
Summary of the invention
The objective of the invention is the aluminium alloy degasifier of existing use is proposed an improvement technical scheme, this technical scheme can overcome the defective of the chloride or fluorine-containing degasifier of existing use, when improving the dehydrogenation effect, reduce the hazard rating to environment, and be convenient to environmental protection treatment.
The present invention is achieved by the following technical solutions:
A kind of aluminium alloy degasifier is comprised of volatile salt, activated carbon and calcium carbonate, and the mass percent of each integral part is: volatile salt 13-15%; Activated carbon 22-25%; All the other are calcium carbonate.
The beneficial effect that the present invention compares with prior art is:
Volatile salt at high temperature decomposes with the hydrogen in the aluminium alloy liquid and oxygen reaction, overflows with gases such as carbonic acid gas, nitrogen peroxide, water vapor, ammonia and a small amount of methane.And because the generation of water vapor is arranged, can improve the stirring degree of molten aluminium alloy liquid, improve the effusion of gas and the floating of aluminium slag.
Embodiment
The below describes embodiments of the invention in detail, and the embodiment that the following describes is exemplary, only is used for explaining the present invention, and can not be interpreted as limitation of the present invention.
A kind of aluminium alloy degasifier is comprised of volatile salt, activated carbon and calcium carbonate, and the mass percent of each integral part is: volatile salt 13-15%; Activated carbon 22-25%; All the other are calcium carbonate.
Embodiment 1
Volatile salt with 13%, 25% activated carbon and the calcium carbonate of surplus are put into 120-130 ℃ baking oven with removing behind the moisture insulation 2 hours, mix after again above-mentioned materials being dropped to room temperature.
Embodiment 2
Volatile salt with 15%, 22% activated carbon and the calcium carbonate of surplus are put into 120-130 ℃ baking oven with removing behind the moisture insulation 2 hours, mix after again above-mentioned materials being dropped to room temperature.
Embodiment 3
Volatile salt with 14%, 23% activated carbon and the calcium carbonate of surplus are put into 120-130 ℃ baking oven with removing behind the moisture insulation 2 hours, mix after again above-mentioned materials being dropped to room temperature.
Usage quantity of the present invention adds the degasifier of 0.2-0.3% for the quality of pressing aluminium alloy.Other using method is with not significantly difference of prior art.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is defined by the following claims.
Claims (1)
1. aluminium alloy degasifier, it is characterized in that: be comprised of volatile salt, activated carbon and calcium carbonate, the mass percent of each integral part is: volatile salt 13-15%; Activated carbon 22-25%; All the other are calcium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104337725A CN102912168A (en) | 2012-10-29 | 2012-10-29 | Aluminum alloy degasifying agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104337725A CN102912168A (en) | 2012-10-29 | 2012-10-29 | Aluminum alloy degasifying agent |
Publications (1)
| Publication Number | Publication Date |
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| CN102912168A true CN102912168A (en) | 2013-02-06 |
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| CN2012104337725A Pending CN102912168A (en) | 2012-10-29 | 2012-10-29 | Aluminum alloy degasifying agent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912167A (en) * | 2012-10-29 | 2013-02-06 | 黄宣斐 | Aluminum alloy degasifier and preparation method thereof |
| CN105296782A (en) * | 2015-11-03 | 2016-02-03 | 任静儿 | Aluminum alloy degasifier and preparation method thereof |
| CN105296783A (en) * | 2015-11-03 | 2016-02-03 | 任静儿 | Aluminum alloy degasifier |
| CN106480333A (en) * | 2016-11-23 | 2017-03-08 | 薛亚红 | A kind of Aluminum alloy degasifier |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1394975A (en) * | 2002-06-28 | 2003-02-05 | 山东大学 | Special degasifier for cleaning aluminium alloy and its application method |
| CN102912167A (en) * | 2012-10-29 | 2013-02-06 | 黄宣斐 | Aluminum alloy degasifier and preparation method thereof |
-
2012
- 2012-10-29 CN CN2012104337725A patent/CN102912168A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1394975A (en) * | 2002-06-28 | 2003-02-05 | 山东大学 | Special degasifier for cleaning aluminium alloy and its application method |
| CN102912167A (en) * | 2012-10-29 | 2013-02-06 | 黄宣斐 | Aluminum alloy degasifier and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912167A (en) * | 2012-10-29 | 2013-02-06 | 黄宣斐 | Aluminum alloy degasifier and preparation method thereof |
| CN105296782A (en) * | 2015-11-03 | 2016-02-03 | 任静儿 | Aluminum alloy degasifier and preparation method thereof |
| CN105296783A (en) * | 2015-11-03 | 2016-02-03 | 任静儿 | Aluminum alloy degasifier |
| CN106480333A (en) * | 2016-11-23 | 2017-03-08 | 薛亚红 | A kind of Aluminum alloy degasifier |
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Application publication date: 20130206 |