CN105132731B - Aluminium and aluminium alloy smelting coverture and preparation method thereof - Google Patents
Aluminium and aluminium alloy smelting coverture and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of aluminium and aluminium alloy smelting coverture, by mass percentage, including following components：The KCl and MgCl of total amount 30 65%2, 15 55% NaCl, 2 20% CaF2, 5 20% hexafluoro aluminate and 2 10% hexafluorosilicate.Above-mentioned aluminium and aluminium alloy smelting coverture, coverage effect is good on aluminum melt, efficiently avoid the oxidation of aluminum melt and the absorption to gas；The coverture aluminum melt higher with temperature produces protective gas when contacting, and effectively completely cuts off aluminium and aluminium alloy melt with air, hydrogen, prevents it from aoxidizing or bubbling, being capable of degasification slagging-off；Hexafluoro aluminate can slow down the generation speed of protective gas, and the long-time for being advantageous to protective gas produces, while hexafluoro aluminate can dissolve the field trashes such as aluminum oxide.Thus above-mentioned aluminium and aluminium alloy smelting coverture can improve the yield and purity of melting aluminum or aluminum alloy, and then improve product quality and economic benefit.The invention further relates to the preparation method of a kind of aluminium and aluminium alloy smelting coverture.
Description
Technical field
The invention belongs to field of metallurgy, is related to a kind of aluminium and aluminium alloy smelting coverture and preparation method thereof.
Background technology
Aluminium property is very active.Aluminium liquid or aluminum alloy melt easily absorb gas during electrolysis, melting, transfer and form folder
The other defect such as slag, oxide-film, stomata, loose, so as to reduce the purity of aluminium liquid or aluminum alloy melt, reduce product purity,
The product qualities such as corrosive nature, while also influence the process industrial art performance of aluminium and aluminium alloy.Therefore, aluminium and aluminium alloy are in melting
Coverture is needed to use in journey to prevent the oxidization burning loss of metal bath and air-breathing, improves the purity and product of aluminium or aluminium alloy
Quality.
Research at present to coverture is less, and following subject matter be present：1st, coverture can not produce protective gas
Active protection is carried out to aluminum melt (being aluminium liquid or aluminum alloy melt).2nd, coverture can not be in aluminium liquid or aluminum alloy melt surface
Very fine and close diaphragm is formed, therefore protecting effect is bad.3rd, coverture water removal is not thorough, and the moisture in coverture is easily and aluminium
Reaction causes in aluminium liquid gas content increase, 4, current coverture typically do not possess slagging-off ability.
The content of the invention
Based on this, it is necessary to provide a kind of raising aluminium or the purity of aluminium alloy and the aluminium of product quality and aluminium alloy smelting
With coverture and preparation method thereof.
A kind of aluminium and aluminium alloy smelting coverture, by mass percentage, including following components：Total amount 30-65%'s
KCl and MgCl2, 15-55% NaCl, 2-20% CaF2, 5-20% hexafluoro aluminate and 2-10% hexafluorosilicic acid
Salt.
Above-mentioned aluminium and aluminium alloy smelting coverture, the coverage effect on aluminum melt (i.e. including aluminium liquid or aluminum alloy melt)
It is good, it efficiently avoid the oxidation of aluminum melt and the absorption to gas；The coverture aluminum melt higher with temperature produces when contacting
Protective gas, effectively aluminium and aluminium alloy melt and air, hydrogen are completely cut off, prevent that it from aoxidizing or foaming, can degasification remove
Slag；Hexafluoro aluminate can slow down the generation speed of protective gas, and the long-time for being advantageous to protective gas produces so that protects
The guard time of shield property gas extends, while hexafluoro aluminate can dissolve the field trashes such as aluminum oxide, purifies aluminium liquid or aluminium alloy
Liquid.Thus above-mentioned aluminium and aluminium alloy smelting coverture can improve the yield and purity of melting aluminum or aluminum alloy, and then improve production
Quality and economic benefit.
In one of the embodiments, the hexafluorosilicate is Na2SiF6And K2SiF6One or both of.
In one of the embodiments, the hexafluoro aluminate is K3AlF6And Na3AlF6One or both of.
Including following components in one of the embodiments, by mass percentage,：The KCl and MgCl of total amount 55%2、
20% NaCl, 5% CaF2, 15% K3AlF6And 5% Na2SiF6。
A kind of preparation method of aluminium and aluminium alloy smelting coverture, comprises the following steps：
Mixture A and mixture B are prepared, wherein, based on the mass percent in aluminium and aluminium alloy smelting coverture,
The mixture A includes total amount 30-65% KCl and MgCl2, 15-55% NaCl and 2-20% CaF2, the mixing
Thing B includes 5-20% hexafluoro aluminate and 2-10% hexafluorosilicate；
The mixture A and mixture B is mixed, obtains aluminium and the aluminium alloy smelting coverture.
In one of the embodiments, the hexafluorosilicate is Na2SiF6And K2SiF6One or both of.
In one of the embodiments, the hexafluoro aluminate is K3AlF6And Na3AlF6One or both of.
In one of the embodiments, it is described mixed based on the mass percent in aluminium and aluminium alloy smelting coverture
Compound A includes the KCl and MgCl of total amount 55%2, 20% NaCl and 5% CaF2, the mixture B includes 15%
K3AlF6And 5% Na2SiF6。
In one of the embodiments, described the step of preparing mixture A, is specially：By total amount 30-65% KCl and
MgCl2, 15-55% NaCl and 2-20% CaF2Mixing, melts and thoroughly removes moisture, and cooling crush obtains the mixing
Thing A.
In one of the embodiments, the raw material for preparing the mixture B is the hexafluoro aluminium containing absorption water or the crystallization water
Hydrochlorate or/and hexafluorosilicate, described the step of preparing mixture B be specially：By the hexafluoro containing absorption water or/and the crystallization water
Aluminate and hexafluorosilicate mixing, melt and thoroughly remove moisture, cooling crush obtains the mixture B.
Brief description of the drawings
Fig. 1 be an embodiment aluminium and aluminium alloy smelting coverture preparation method flow chart.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the preferred embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make the understanding to the disclosure more saturating
It is thorough comprehensive.
The aluminium and aluminium alloy smelting coverture of one embodiment, by mass percentage, including following components：Total amount
30-65% KCl and MgCl2, 15-55% NaCl, 2-20% CaF2, 5-20% hexafluoro aluminate and 2-10%
Hexafluorosilicate.
Wherein, KCl, MgCl2, NaCl and CaF2It is low (700 DEG C) that fusing point can be formed, the polynary phase of surface tension very little, made
Coverture coverage effect on aluminum melt is good, efficiently avoid the oxidation of aluminum melt and the absorption to gas.
Wherein, pyrolytic occurs when temperature is higher than 300 DEG C for hexafluorosilicate, produces silicon fluoride gas.Aluminium and aluminium close
More than 300 DEG C, therefore when the above-mentioned coverture aluminum melt higher with temperature contacts, hexafluorosilicate produces the temperature of the melting of gold
Aluminium and aluminium alloy melt are effectively completely cut off, prevented by raw silicon fluoride gas, silicon fluoride gas as protective gas with air, hydrogen
Only its oxidation or foaming, it is thus possible to which degasification removes the gred.
Preferably, KCl and MgCl2Total amount in, KCl and MgCl2Mol ratio be 1:1.Wherein, KCl and MgCl2Can be by
Raw material carnallite provides, and the composition of carnallite is potassium, the haloid deposit of magnesium, chemical formula KClMgCl2·6H2O。
Preferably, hexafluorosilicate Na2SiF6And K2SiF6One or both of.It is furthermore preferred that hexafluorosilicate is
Na2SiF6.Wherein, hexafluorosilicate can be provided by one or both of raw material elpasolite and sodium cryolite.
Wherein, hexafluoro aluminate can slow down the generation speed that hexafluorosilicate produces protective gas, be advantageous to protect
Property gas long-time produce so that the guard time of protective gas extends, while hexafluoro aluminate can dissolve aluminum oxide etc.
Field trash.
Preferably, hexafluoro aluminate is K3AlF6(main component of elpasolite) and Na3AlF6(sodium cryolite it is main
One or both of composition).It is furthermore preferred that hexafluoro aluminate is K3AlF6。
Preferably, aluminium and aluminium alloy smelting coverture, by mass percentage, including following components：Total amount 55%
KCl and MgCl2, 20% NaCl, 5% CaF2, 15% K3AlF6And 5% Na2SiF6。
Above-mentioned aluminium and aluminium alloy smelting coverture, coverage effect is good on aluminum melt, efficiently avoid aluminum melt
Oxidation and the absorption to gas；The coverture aluminum melt higher with temperature produces protective gas when contacting, effectively by aluminium and
Aluminium alloy melt completely cuts off with air, hydrogen, prevents it from aoxidizing or bubbling, being capable of degasification slagging-off；Hexafluoro aluminate can slow down guarantor
The generation speed of shield property gas, the long-time for being advantageous to protective gas produce so that and the guard time of protective gas extends,
Hexafluoro aluminate can dissolve the field trashes such as aluminum oxide simultaneously, purify aluminium liquid or aluminum alloy melt.Thus above-mentioned aluminium and aluminium alloy smelting
The yield and purity of melting aluminum or aluminum alloy can be improved with coverture, and then improves product quality and economic benefit.
Reference picture 1, present invention also offers the preparation method of the aluminium of an embodiment and aluminium alloy smelting coverture, bag
Include following steps：
Step S100：Mixture A is prepared, wherein, based on the mass percent in aluminium and aluminium alloy smelting coverture,
Mixture A includes total amount 30-65% KCl and MgCl2, 15-55% NaCl and 2-20% CaF2。
In one of the embodiments, step S100 is specially：By total amount 30-65% KCl and MgCl2, 15-55%
NaCl and 2-20% CaF2Mixing, fusing, thoroughly removes moisture, cooling crush obtains mixture A.
Preferably, KCl and MgCl2Total amount in, KCl and MgCl2Mol ratio be 1:1.Wherein, KCl and MgCl2Can be by
Raw material carnallite provides, and the composition of carnallite is potassium, the haloid deposit of magnesium, chemical formula KClMgCl2·6H2O。
KCl、MgCl2, NaCl and CaF2Material is completely melt that formation fusing point is low (700 DEG C), the polynary phase of surface tension very little,
So that coverture coverage effect on aluminum melt is good, the oxidation of aluminum melt and the absorption to gas efficiently avoid；And
KCl、MgCl2, NaCl and CaF2It is thorough by high temperature melting water removal, aluminum melt will not be caused because moisture is brought in coverture into
Middle gas content increase.
Preferably, based on the mass percent in aluminium and aluminium alloy smelting coverture, mixture A includes total amount 55%
KCl and MgCl2, 20% NaCl and 5% CaF2。
Preferably, in the step of preparing mixture A, the thoroughly dewatered condition that melts is to be protected at 700-900 DEG C
Warm 0.5-2 hours.
It is furthermore preferred that the temperature of insulation is 800 DEG C, soaking time is 1 hour.
Preferably, the heating rate for being heated to 700-900 DEG C is 2-5 DEG C/min.
Step S200：Mixture B is prepared, wherein, based on the mass percent in aluminium and aluminium alloy smelting coverture,
Mixture B includes 5-20% hexafluoro aluminate and 2-10% hexafluorosilicate.
Wherein, the raw material for preparing mixture B can be the hexafluoro aluminate and hexafluorosilicic acid for not containing absorption water and the crystallization water
Salt, or hexafluoro aluminate and hexafluorosilicate containing absorption water or the crystallization water.
In one of the embodiments, the raw material for preparing mixture B is the hexafluoro aluminic acid containing absorption water or/and the crystallization water
Salt or/and hexafluorosilicate, step S200 are specially：By hexafluoro aluminate and hexafluoro silicon containing absorption water or/and the crystallization water
Hydrochlorate mixes, and melts and thoroughly removes moisture, and cooling crush obtains mixture B, wherein, by aluminium and aluminium alloy smelting coverture
In mass percent meter, mixture B including 5-20% hexafluoro aluminate and 2-10% hexafluorosilicate.
By fluoaluminate and hexafluorosilicate mixed melting, be advantageous to being sufficiently mixed for fluoaluminate and hexafluorosilicate,
So that hexafluoro aluminate can preferably slow down the generation speed of protective gas, be advantageous to the long-time production of protective gas
It is raw, promote the guard time of protective gas to extend.
Preferably, hexafluorosilicate Na2SiF6And K2SiF6One or both of.It is appreciated that hexafluorosilicate can
There is provided by one or both of raw material elpasolite and sodium cryolite.
It is furthermore preferred that hexafluorosilicate is Na2SiF6。
Preferably, hexafluoro aluminate is K3AlF6And Na3AlF6One or both of.It is furthermore preferred that hexafluoro aluminate is
K3AlF6。
Preferably, based on the mass percent in aluminium and aluminium alloy smelting coverture, mixture B includes 15%
K3AlF6And 5% Na2SiF6。
Preferably, in the step of preparing mixture A, the thoroughly dewatered condition that melts is to be protected at 200-300 DEG C
Warm 1-4 hours, fully to remove the moisture and the crystallization water in coverture, in case moisture reacts with aluminium liquid causes gas in aluminium liquid
The increase of body content.Decomposition temperature in view of hexafluorosilicate is more than 300 DEG C, and mixture A fusion temperature is higher, therefore
Mixture A and mixture B are separately prepared.
It is furthermore preferred that the temperature of insulation is 300 DEG C, the time of insulation is 2 hours.
Preferably, the heating rate for being heated to 200-300 DEG C is 2-5 DEG C/min.
In one of the embodiments, the raw material for preparing mixture B is the hexafluoro aluminic acid for not containing absorption water and the crystallization water
Salt and hexafluorosilicate, it can use and directly mix hexafluoro aluminate and hexafluorosilicate, also can be incubated 1- at 200-300 DEG C
4 hours, mixed melting, cooling crush obtained mixture B.
Step S300：Said mixture A and mixture B is mixed, obtains the aluminium and aluminium alloy smelting coverture.
Preferably, step S300 is specially：Said mixture A and mixture B is mixed, 20 mesh sieves is crossed, it is small to obtain particle diameter
In 0.85mm aluminium and aluminium alloy smelting coverture.
Preferably, obtained aluminium and aluminium alloy smelting are sealed with coverture.
It is appreciated that points of the step S100 and step S200 without priority, can also carry out carrying out again after step S200
Step S100, it can also carry out simultaneously.
The preparation method of above-mentioned aluminium and aluminium alloy smelting coverture, step is simple, and sufficient raw, cost is low, obtains
The aluminium and aluminium alloy smelting coverture arrived, water removal is thorough, and coverage effect is good on aluminum melt, efficiently avoid aluminum melt
Oxidation and the absorption to gas；The coverture aluminum melt higher with temperature produces protective gas when contacting, effectively by aluminium and
Aluminium alloy melt completely cuts off with air, hydrogen, prevents it from aoxidizing or bubbling, being capable of degasification slagging-off；Hexafluoro aluminate can slow down guarantor
The generation speed of shield property gas, the long-time for being advantageous to protective gas produce so that and the guard time of protective gas extends,
Hexafluoro aluminate can dissolve the field trashes such as aluminum oxide simultaneously, purify aluminium liquid or aluminum alloy melt.Thus above-mentioned aluminium and aluminium alloy smelting
It can in production be widely used with coverture and preparation method thereof, yield, purity and the product of melting aluminum or aluminum alloy can be improved
Quality, and then increase economic efficiency.
It is specific embodiment below.
Embodiment 1
The aluminium and aluminium alloy smelting coverture of embodiment 1, by mass percentage, including following components：Total amount 55%
KCl and MgCl2, 20% NaCl, 5% CaF2, 15% K3AlF6And 5% Na2SiF6, wherein KCl and MgCl2's
Mol ratio is 1:1.
The preparation method of above-mentioned aluminium and aluminium alloy smelting coverture prepares as follows：
By above-mentioned mass percent, by carnallite, NaCl and CaF2Mixing, is heated to 3 DEG C/min heating rate
800 DEG C and be incubated 1 hour, cooling crush obtains mixture A.
By above-mentioned mass percent, by elpasolite and Na2SiF6Mixing, is heated to 3 DEG C/min heating rate
300 DEG C and be incubated 2 hours, cooling crush obtains mixture B.
Said mixture A and mixture B is mixed, crosses 20 mesh sieves, aluminium of the particle diameter less than 0.85mm is obtained and aluminium alloy melts
Refining coverture, Seal and preservation.
Embodiment 2
The aluminium and aluminium alloy smelting coverture of embodiment 2, by mass percentage, including following components：Total amount 65%
KCl and MgCl2, 15% NaCl, 2% CaF2, 8% K3AlF6And 10% Na2SiF6, wherein KCl and MgCl2's
Mol ratio is 1:1.
The preparation method of above-mentioned aluminium and aluminium alloy smelting coverture prepares as follows：
By above-mentioned mass percent, by carnallite, NaCl and CaF2Mixing, is heated to 5 DEG C/min heating rate
900 DEG C and be incubated 0.5 hour, cooling crush obtains mixture A.
By above-mentioned mass percent, by sodium cryolite and K2SiF6Mixing, 280 are heated to 5 DEG C/min heating rate
DEG C and be incubated 4 hours, cooling crush obtains mixture B.
Said mixture A and mixture B is mixed, crosses 20 mesh sieves, aluminium of the particle diameter less than 0.85mm is obtained and aluminium alloy melts
Refining coverture, Seal and preservation.
Embodiment 3
The aluminium and aluminium alloy smelting coverture of embodiment 3, by mass percentage, including following components：Total amount 30%
KCl and MgCl2, 43% NaCl, 20% CaF2, 5% Na3AlF6And 2% Na2SiF6, wherein KCl and MgCl2
Mol ratio be 1:1.
The preparation method of above-mentioned aluminium and aluminium alloy smelting coverture prepares as follows：
By above-mentioned mass percent, by carnallite, NaCl and CaF2Mixing, is heated to 2 DEG C/min heating rate
700 DEG C and be incubated 2 hours, cooling crush obtains mixture A.
By above-mentioned mass percent, by K3AlF6And Na2SiF6Mixing, 300 are heated to 2 DEG C/min heating rate
DEG C and be incubated 1 hour, cooling crush obtains mixture B.
Said mixture A and mixture B is mixed, crosses 20 mesh sieves, obtains the aluminium and aluminium alloy that particle diameter is less than 0.85mm
Covering agent for smelting, Seal and preservation.
Embodiment 4
The aluminium and aluminium alloy smelting coverture of embodiment 4, by mass percentage, including following components：Total amount 40%
KCl and MgCl2, 20% NaCl, 5% CaF2, 20% K3AlF6And 10% K2SiF6, wherein KCl and MgCl2's
Mol ratio is 1:1.
The preparation method of above-mentioned aluminium and aluminium alloy smelting coverture prepares as follows：
By above-mentioned mass percent, by carnallite, NaCl and CaF2Mixing, is heated to 3 DEG C/min heating rate
700 DEG C and be incubated 1 hour, cooling crush obtains mixture A.
By above-mentioned mass percent, by sodium cryolite and K2SiF6Mixing, 200 are heated to 5 DEG C/min heating rate
DEG C and be incubated 2 hours, cooling crush obtains mixture B.
Said mixture A and mixture B is mixed, crosses 20 mesh sieves, aluminium of the particle diameter less than 0.85mm is obtained and aluminium alloy melts
Refining coverture, Seal and preservation.
Embodiment 5
The aluminium and aluminium alloy smelting coverture of embodiment 5, by mass percentage, including following components：Total amount 30%
KCl and MgCl2, 55% NaCl, 2% CaF2, 5% Na3AlF6And 5% K2SiF6, wherein KCl and MgCl2's
Mol ratio is 1:1.
The preparation method of above-mentioned aluminium and aluminium alloy smelting coverture prepares as follows：
By above-mentioned mass percent, by carnallite, NaCl and CaF2Mixing, is heated to 5 DEG C/min heating rate
800 DEG C and be incubated 0.5 hour, cooling crush obtains mixture A.
By above-mentioned mass percent, by Na3AlF6And Na2SiF6Mixing, 260 are heated to 3 DEG C/min heating rate
DEG C and be incubated 2 hours, cooling crush obtains mixture B.
Said mixture A and mixture B is mixed, crosses 20 mesh sieves, aluminium of the particle diameter less than 0.85mm is obtained and aluminium alloy melts
Refining coverture, Seal and preservation.
Aluminium and aluminium alloy smelting coverture prepared by embodiment 1, for smelting aluminum, yield, purity and product matter
Amount
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of aluminium and aluminium alloy smelting coverture, it is characterised in that by mass percentage, composed of the following components：Always
Measure 40-65% KCl and MgCl2, 15-20% NaCl, 2-20% CaF2, 8-20% hexafluoro aluminate and 5-10%
Hexafluorosilicate, wherein KCl and MgCl2Total amount in, KCl and MgCl2Mol ratio be 1:1, the KCl and MgCl2By original
Expect that carnallite provides, the hexafluorosilicate is Na2SiF6And K2SiF6One or both of, the hexafluoro aluminate is
K3AlF6And Na3AlF6One or both of.
2. aluminium as claimed in claim 1 and aluminium alloy smelting coverture, it is characterised in that by mass percentage, including
Following components：The KCl and MgCl of total amount 55%2, 20% NaCl, 5% CaF2, 15% K3AlF6And 5%
Na2SiF6。
3. the preparation method of a kind of aluminium and aluminium alloy smelting coverture, it is characterised in that comprise the following steps：
Mixture A and mixture B are prepared, wherein, it is described based on the mass percent in aluminium and aluminium alloy smelting coverture
Mixture A includes total amount 40-65% KCl and MgCl2, 15-20% NaCl and 2-20% CaF2, the KCl and
MgCl2There is provided by raw material carnallite, wherein KCl and MgCl2Total amount in, KCl and MgCl2Mol ratio be 1:1, the mixing
Thing B includes 8-20% hexafluoro aluminate and 5-10% hexafluorosilicate, and the hexafluorosilicate is Na2SiF6With
K2SiF6One or both of, the hexafluoro aluminate is K3AlF6And Na3AlF6One or both of；
The mixture A and mixture B is mixed, obtains aluminium and the aluminium alloy smelting coverture.
4. the preparation method of aluminium as claimed in claim 3 and aluminium alloy smelting coverture, it is characterised in that by aluminium and aluminium
Mass percent meter in alloy melting coverture, the mixture A include the KCl and MgCl of total amount 55%2, 20%
NaCl and 5% CaF2, the mixture B includes 15% K3AlF6And 5% Na2SiF6。
5. the preparation method of aluminium as claimed in claim 3 and aluminium alloy smelting coverture, it is characterised in that described prepare is mixed
The step of compound A is specially：By total amount 40-65% KCl and MgCl2, 15-20% NaCl and 2-20% CaF2Mixing,
Fusing thoroughly removes moisture, and cooling crush obtains the mixture A.
6. the preparation method of aluminium as claimed in claim 3 and aluminium alloy smelting coverture, it is characterised in that prepare described mixed
Compound B raw material be containing absorption water or the crystallization water hexafluoro aluminate or/and hexafluorosilicate, it is described to prepare mixture B's
Step is specially：Hexafluoro aluminate and hexafluorosilicate containing absorption water or/and the crystallization water are mixed, melts and thoroughly removes water
Point, cooling crush obtains the mixture B.
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| CN1026709C (en) * | 1991-12-16 | 1994-11-23 | 东北工学院 | Slag removing agent for aluminum or aluminum alloy refining |
| CN1050637C (en) * | 1995-02-11 | 2000-03-22 | 傅立土 | Fluxing agent for melting nonferrous alloy, prepn. method, and application method thereof |
| CN101250636B (en) * | 2008-03-27 | 2010-06-02 | 武汉英立科技研究所 | Nonferrous alloy smelting fusing agent and preparation method |
| CN102312104A (en) * | 2011-10-14 | 2012-01-11 | 南南铝业股份有限公司 | Refining agent for aluminium and aluminium alloy melting |
| CN102965527B (en) * | 2012-11-29 | 2014-07-09 | 哈尔滨理工大学 | Method for preparing aluminium-chromium intermediate alloy by using chromium shavings |
| CN103820668B (en) * | 2014-03-19 | 2016-04-06 | 太湖县光华铝业有限公司 | High-compactness aluminium-silicon ingots production technique |
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