CN103173643A - Novel secondary aluminum modifying refiner and method for smelting secondary aluminum by utilizing refiner - Google Patents
Novel secondary aluminum modifying refiner and method for smelting secondary aluminum by utilizing refiner Download PDFInfo
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- CN103173643A CN103173643A CN2013100389710A CN201310038971A CN103173643A CN 103173643 A CN103173643 A CN 103173643A CN 2013100389710 A CN2013100389710 A CN 2013100389710A CN 201310038971 A CN201310038971 A CN 201310038971A CN 103173643 A CN103173643 A CN 103173643A
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Abstract
The invention relates to a novel secondary aluminum modifying refiner and a method for smelting secondary aluminum by utilizing the refiner. The method for producing the secondary alumium by utilizing the refiner specifically comprises the following steps: putting weighed industrial pure aluminum, industrial silicon and waste aluminum into a constant-temperature preheating drying furnace of 250 DEG C to dry for 2-3 hours; conveying dried raw materials into a melting furnace, and removing gas and slag after complete melting; adding 0.3wt%-0.5wt% of novel secondary aluminum modifying refiner when the temperature reaches 730-750 DEG C, fully stirring and standing, detecting and regulating the components; and (5) casting ingots when the temperature is 680-720 DEG C to prepare the secondary aluminum. The novel modifying refiner provided by the invention not only can effectively control the content of impurity elements but also can fully utilize interaction effect between the elements to realize the benefits of the impurity elements, thereby greatly reducing the relegation and regeneration cost and improving the quality and performance of the regenerated products.
Description
Technical field
The invention belongs to the non-ferrous metal alloy technical field of material, relate to and a kind ofly in the waste aluminum fusion process, impurity element being control effectively, and can take full advantage of interaction between element, realize the online treatment technology of usefulization of impurity element, especially a kind of New Regenerated aluminium modifying-refining agent and utilize the method for this fining agent melting secondary aluminum.
Background technology
The aggregate consumption of whole world aluminium is about 3,500 ten thousand tons (34972kt), and wherein secondary aluminum output approximately 1,000 ten thousand tons (10500kt), account for 30% of overall consumption.Waste aluminum safeguarding grades regeneration has very important composite strategies meaning.According to industry development planning, to the year two thousand twenty, China's secondary aluminum output shared proportion in whole aluminium ultimate production brings up to 60% from present 21%.Only this item, 1,365 hundred million kilowatt-hours of can economizing on electricity every year are equivalent to save the average annual energy output of one and half Three Gorges Projects, annual water saving 9l00 ten thousand stere.
In waste aluminum, main impurity element comprises Fe, Cu, Mn, Zn, Mg etc., and impurity element is difficult to remove mostly, processes the over-all properties that bad meeting has a strong impact on aluminum alloy materials.The difficulty of waste aluminum melting regeneration is more much bigger than primary aluminum, and one of its basic reason is exactly the control of impurity element.Prior art is all to guarantee the reconstituted product quality and performance by the method that adds the fine aluminium dilution to reduce tramp element content.This method easily causes the secondary aluminum cost to improve, and has reduced the value of alloying element.
By retrieval, not yet find the publication document relevant to present patent application.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, a kind of method of utilizing New Regenerated aluminium modifying-refining agent melting secondary aluminum that regeneration cost is low, the reconstituted product quality is high, performance good, the waste aluminum rate of recovery is high is provided.
Another object of the present invention is to provide a kind of New Regenerated aluminium modifying-refining agent, fining agent utilizes rare earth element (RE) to produce useful effect to grain refining, weave construction etc. rotten and that improve impurity phase, realizes that impurity element is to the transformation of usefulization of alloying element.
The objective of the invention is to be achieved through the following technical solutions:
A kind of New Regenerated aluminium modifying-refining agent, fining modifier effective constituent is: 92Al-5Ti-1B-1Ce-1La, the massfraction scope of novel modifying-refining agent Al-Ti-B-Ce-La is: 4.5-6.5%Ti, 0.8-1.2%B, 0.6-1.4%Ce, 0.6-1.4%La, surplus is aluminium.
And the preparation method of described fining agent is:
⑴ select commercial-purity aluminium, K
2TiF
6, KBF
6, AlCe10 alloy, AlLa10 alloy be as raw material;
⑵ with load weighted commercial-purity aluminium, K
2TiF
6, KBF
6, AlCe10 alloy, AlLa10 alloy put into the constant temperature preheating and drying stove dry 2-3 hour of 230-260 ℃;
⑶ add load weighted commercial-purity aluminium in drying oven, 800 ℃ of furnace temperature are set, the energising heating;
⑷ when be warming up to 800 ℃, add load weighted K
2TiF6, KBF
6Mixture fully stirs, and insulation guarantees TiAl
3, TiB
2Particle is distributed in melt more uniformly;
⑸ add AlCe10 alloy, AlLa10 alloy, stirs, and mentioned component is uniformly distributed in melt, standing, when temperature reach 730-800 ℃ skim, degasification, time 3-7 minute;
⑹ cast when temperature reaches 720-750 ℃, is Al-Ti-B-Ce-La New Regenerated aluminium modifying-refining agent after the demoulding.
A kind of method of New Regenerated aluminium modifying-refining agent, step is as follows:
⑴ select commercial-purity aluminium, K
2TiF
6, KBF
6, AlCe10 alloy, AlLa10 alloy be as raw material;
⑵ with load weighted commercial-purity aluminium, K
2TiF
6, KBF
6, AlCe10 alloy, AlLa10 alloy put into the constant temperature preheating and drying stove dry 2-3 hour of 230-260 ℃;
⑶ add load weighted commercial-purity aluminium in drying oven, 800 ℃ of furnace temperature are set, the energising heating;
⑷ when be warming up to 800 ℃, add load weighted K
2TiF6, KBF
6Mixture fully stirs, and insulation guarantees TiAl
3, TiB
2Particle is distributed in melt more uniformly;
⑸ add AlCe10 alloy, AlLa10 alloy, stirs, and mentioned component is uniformly distributed in melt, standing, when temperature reach 730-800 ℃ skim, degasification, time 3-7 minute;
⑹ cast when temperature reaches 720-750 ℃, is Al-Ti-B-Ce-La New Regenerated aluminium modifying-refining agent after the demoulding;
Described proportioning raw materials is calculated according to target value and all can be drawn.
A kind of method of melting secondary aluminum adopts New Regenerated aluminium modifying-refining agent.
And, at first prepare New Regenerated aluminium modifying-refining agent, then utilize novel modifying-refining agent to produce secondary aluminum,
Utilize the concrete grammar of novel modifying-refining agent production secondary aluminum as follows:
⑴ put into load weighted commercial-purity aluminium, industrial silicon, waste aluminum in the constant temperature preheating and drying stove dry 2-3 hour of 250 ℃;
⑵ add waste aluminum, industrial silicon, commercial-purity aluminium in the accumulation of heat smelting furnace, the igniting heating;
⑶ measure temperature after all raw materials melt fully, when temperature reaches 750 ℃ of left and right, add the refining agent of gross weight 0.2%-0.25%, adjusts nitrogen flow, carries out the degasification slagging-off;
⑷ when reach 730 ℃-750 ℃ when temperature, add the New Regenerated aluminium modifying-refining agent of 0.3-0.5wt%, fully stir, standing, detect composition and adjust;
⑸ composition is qualified, and when temperature reached 680-720 ℃, the casting ingot casting made secondary aluminum.
Advantage of the present invention and beneficial effect are:
1, the present invention utilizes rare earth element (RE) to produce useful effect to grain refining, weave construction etc. rotten and that improve impurity phase, in the waste aluminum fusion process, add the novel fining modifier that contains trace rare-earth element, realize that impurity element is to the transformation of usefulization of alloying element, its tensile strength can increase 15%-20%, relative elongation increases 1.5-2.0 doubly, and the usage ratio of waste aluminum is brought up to more than 80%.
2, the novel fining modifier that provides in the present invention can not only control effectively the content of impurity element, and can take full advantage of interaction between element, realize usefulization of impurity element, and then can greatly reduce the safeguarding grades regeneration cost, improve the reconstituted product quality and performance.
3, the present invention adopt rare earth element ce, La can with aluminium liquid in the impurity element effect, generate stable intermetallic compound (REFe
5, Al
8Cu
4RE, Al
8Mn
4RE etc.), these compound good heat resistances, thermostability are high, and being the second-phase compound that contains rare earth element that disperse distributes becomes crystallization nuclei, has improved nucleation rate, thus refinement crystal grain, the tensile strength of aluminium alloy and plasticity and toughness are greatly improved.
4, after the application adds rich cerium, the novel modifying-refining agent of lanthanum Al-Ti-B-Ce-La, the further crumby multi-element compounds AlSiMnFe of refinement, and making Eutectic Silicon in Al-Si Cast Alloys be refined as rod-short or spherulitic by the bodkin shape, rare earth element also has certain de-iron effect in addition.
Description of drawings:
Fig. 1 is for adding common fining agent ADC1 product metallographic structure figure (1), and wherein A is the rich iron phase of thick faller gill shape;
Fig. 2 is for adding common fining agent ADC1 product metallographic structure figure (2), and wherein A is the rich iron phase of thick faller gill shape;
Fig. 3 is for adding Al-Ti-B-Ce-La novel modifying-refining agent ADC1 product metallographic structure figure (1);
Fig. 4 is for adding Al-Ti-B-Ce-La novel modifying-refining agent ADC1 product metallographic structure figure (2).
Embodiment
The invention will be further described below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
In the application, New Regenerated aluminium modifying-refining agent inventive principle is as follows:
Rare earth element ce, La can with aluminium liquid in the impurity element effect, generate stable intermetallic compound (REFe
5, Al
8Cu
4RE, Al
8Mn
4RE etc.), these compound good heat resistances, thermostability are high, and being the second-phase compound that contains rare earth element that disperse distributes becomes crystallization nuclei, has improved nucleation rate, thus refinement crystal grain, the tensile strength of aluminium alloy and plasticity and toughness are greatly improved.After adding in addition rich cerium, the novel modifying-refining agent of lanthanum Al-Ti-B-Ce-La, the further crumby multi-element compounds AlSiMnFe of refinement, and make Eutectic Silicon in Al-Si Cast Alloys be refined as rod-short or spherulitic by the bodkin shape, rare earth element also has certain de-iron effect in addition.
The concrete steps of the melting method of secondary aluminum are as follows:
1, the preparation of the novel modifying-refining agent of Al-Ti-B-Ce-La
⑴ select commercial-purity aluminium (99.70%), K2TiF6, KBF6, AlCe10 alloy, AlLa10 alloy etc. as raw material, and the target value of finished product fining modifier effective constituent is: 92Al-5Ti-1B-1Ce-1La.The massfraction scope of the novel modifying-refining agent of Al-Ti-B-Ce-La is: 4.5-6.5%Ti, and 0.8-1.2%B, 0.6-1.4%Ce, 0.6-1.4%La, aluminium are surplus.
⑵ with load weighted commercial-purity aluminium, K
2TiF
6, KBF
6, AlCe10 alloy, AlLa10 alloy put into the constant temperature preheating and drying stove dry 2-3 hour of 250 ℃.
⑶ add load weighted commercial-purity aluminium in 1 ton of experimental furnace, 800 ℃ of furnace temperature are set, the energising heating.
⑷ when be warming up to 800 ℃, add load weighted K
2TiF6, KBF
6Mixture fully stirs, and is incubated about 1 hour, guarantees TiAl
3, TiB
2Particle is distributed in melt more uniformly.
⑸ add AlCe10 alloy, AlLa10 alloy, stirs at set intervals, and rare earth element is uniformly distributed in melt, and standing 30 minutes, skimmed in 750 ℃ of left and right, degasification when temperature reaches, 5 minutes time.
⑹ cast when temperature reaches 720-740 ℃ of left and right, is the new and effective modifying-refining agent of Al-Ti-B-Ce-La after the demoulding.
2, utilize the novel modifying-refining agent of Al-Ti-B-Ce-La to produce the secondary aluminum product
⑴ put into load weighted commercial-purity aluminium, industrial silicon, waste aluminum (scrapping body cylinder cap, air conditioning pump, useless wheel hub) in the constant temperature preheating and drying stove dry 2-3 hour of 250 ℃.
⑵ add waste aluminum, industrial silicon, commercial-purity aluminium in 20T accumulation of heat smelting furnace, the igniting heating.
⑶ measure temperature after all raw materials melt fully.When temperature reaches 750 ℃ of left and right, add the refining slag-cleaning agent of gross weight 0.2%-0.25%, adjust nitrogen flow, carry out the degasification slagging-off, 5 minutes time.
⑷ when reach 730 ℃-750 ℃ when temperature, add the novel modifying-refining agent of Al-Ti-B-Ce-La of 0.3-0.5wt%, fully stir, standing 15 minutes, detect composition and adjust.
⑸ when reach 680-720 ℃ when temperature, the casting ingot casting.
In order to illustrate aforesaid method, the application narrates concrete production process to produce the ADC1 product as example, and production process comprises two steps, is respectively the preparation of novel modifying-refining agent and the melting of secondary aluminum, and is specific as follows:
The slag-cleaning agent that following examples are used is: the HGJ-2 aluminium alloy is without sodium refining slag-cleaning agent, upper marine rainbow light metal flux factory.
Embodiment 1
A kind of New Regenerated aluminium modifying-refining agent and utilize the method for this fining agent melting secondary aluminum, specific as follows:
1, the novel modifying-refining agent of preparation Al-Ti-B-Ce-La, 1000kg always feeds intake.
⑴ with load weighted commercial-purity aluminium, K
2TiF
6, KBF
6, AlCe10 alloy, AlLa10 alloy put into dry 2.5 hours of the constant temperature preheating and drying stove of 250 ℃.
⑵ add the 542kg commercial-purity aluminium in 1 ton of experimental furnace, 800 ℃ of furnace temperature are set, firing up.
⑶ when being warming up to 800 ℃ after commercial-purity aluminium fusing, add 192kg K
2TiF6,116kg KBF
6, fully stir, be incubated about one hour, guarantee TiAl
3, TiB
2Particle is distributed in melt more uniformly.
⑷ add 75kg AlCe10 alloy, 75kg AlLa10 alloy, stirs at set intervals, and rare earth element is uniformly distributed in melt, standing 30 minutes, skims when temperature reaches 750 ℃ of left and right.Adjust nitrogen flow, preheating degasification rod, degasification, 5 minutes degasification time.
⑸ cast when temperature reaches 720 ℃, is the new and effective modifying-refining agent of Al-Ti-B-Ce-La after the demoulding.
2, utilize the novel modifying-refining agent of Al-Ti-B-Ce-La to produce the ADC1 product.
⑴ put into load weighted commercial-purity aluminium, industrial silicon, waste aluminum in dry 2.5 hours of the constant temperature preheating and drying stove of 250 ℃.
⑵ add waste aluminum 12000kg, industrial silicon 200kg, commercial-purity aluminium 2800kg in 20T accumulation of heat smelting furnace, the 15T that always feeds intake, igniting heating.
⑶ measure temperature after all raw materials melt fully, detect composition.Composition qualified (one) when temperature reaches 750 ℃ of left and right, adds gross weight 35kg refining slag-cleaning agent, adjusts nitrogen flow, carries out the degasification slagging-off, 5 minutes degasification time.
⑷ when reach 740 ℃ when temperature, add to prepare the novel modifying-refining agent of 75kgAl-Ti-B-Ce-La, fully stir, standing 15 minutes, detect composition, detected value is (two).
⑸ composition is qualified, when temperature reaches 720 ℃ of left and right, and the casting ingot casting.
The standard that composition is qualified is: Si:11.5-12.5Fe:0.65-0.95Mg:＜0.29Cu:＜0.9Zn:＜0.48Mn:＜0.28Ni:＜0.48Sn:＜0.095Al: surplus.
Wherein, detect acceptance value: (one) Si:12.1414Fe:0.6611Mg:0.2272Cu:0.7317Zn:0.4783Mn:0.1677N i:0.0237Sn:0.0036.
Detect acceptance value: (two) Si:12.1751Fe:0.7202Mg:0.2341Cu:0.7455Zn:0.2771Mn:0.2328N i:0.0197Sn:0.0015.
Embodiment 2
A kind of New Regenerated aluminium modifying-refining agent and utilize the method for this fining agent melting secondary aluminum, specific as follows:
1, the novel modifying-refining agent of preparation Al-Ti-B-Ce-La, 800kg always feeds intake.
⑴ with load weighted commercial-purity aluminium, K
2TiF
6, KBF
6, AlCe10 alloy, AlLa10 alloy put into dry 2.5 hours of the constant temperature preheating and drying stove of 250 ℃.
⑵ add the 433kg commercial-purity aluminium in 1 ton of experimental furnace, 800 ℃ of furnace temperature are set, firing up.
⑶ when being warming up to 800 ℃ after commercial-purity aluminium fusing, add 154kgK
2TiF6,93kgKBF
6, fully stir, be incubated about one hour, guarantee TiAl
3, TiB
2Particle is distributed in melt more uniformly.
⑷ add 60kgAlCe10 alloy, 60kgAlLa10 alloy, stirs at set intervals, and rare earth element is uniformly distributed in melt, standing 30 minutes, skims when temperature reaches 750 ℃ of left and right.Adjust nitrogen flow, preheating degasification rod, degasification, 5 minutes degasification time.
⑸ be the new and effective modifying-refining agent of Al-Ti-B-Ce-La when temperature reaches 720 ℃ of casting after the demoulding.
2, utilize the novel modifying-refining agent of Al-Ti-B-Ce-La to produce the ADC1 product
⑴ put into load weighted commercial-purity aluminium, industrial silicon, waste aluminum in dry 2.5 hours of the constant temperature preheating and drying stove of 250 ℃.
⑵ add waste aluminum 16000kg, industrial silicon 250kg, commercial-purity aluminium 3750kg altogether, the 20T that always feeds intake, igniting heating in 20T accumulation of heat smelting furnace.
⑶ measure temperature after all raw materials melt fully, detect composition.
⑷ silicone content detected value is 11.4, off analysis.Add silicon 60kg, fully stir and detect until completely melted.
⑸ composition is qualified, when temperature reaches 750 ℃, adds gross weight 60kg refining slag-cleaning agent, adjusts nitrogen flow, carries out the degasification slagging-off, 5 minutes degasification time.
⑹ when reach 740 ℃ when temperature, add to prepare the novel modifying-refining agent of 100kgAl-Ti-B-Ce-La, fully stir, standing 15 minutes, detect composition.
⑺ composition is qualified, when temperature reaches 720 ℃ of left and right, and the casting ingot casting.
The present invention compares with the secondary aluminum of common fining agent melting, and the index contrast is as follows:
Table 1, indices contrast
Table 2 allocation sheet
Can be drawn by above: in the raw material of production ADC1 product, the waste aluminum proportion has brought up to 80% by original 10%-50%.The energy consumption of producing secondary aluminum only is equivalent to produce 5% left and right of primary aluminum energy consumption, and energy-saving effect is outstanding; Compare with producing primary aluminum, produce 1 ton of secondary aluminum and can reduce CO
2Quantity discharged 0.8 ton of (reducing 90%), 0.6 ton of sulfurous gas of minimizing, while can be economized on water 10.05 tons, use less 11 tons of solid-state materials, can not produce asphalt smoke and fluoride pollution, and greenness is high.When using New Refiners and producing secondary aluminium alloy, owing to having increased substantially the proportion of waste aluminum in raw material, can make production cost 5% left and right that descends, simultaneously owing to having avoided repeatedly adjusting component, make energy consumption and burn out rate all descend to some extent.
Metallograph before and after processing can be found out by metallographic structure figure as shown in Fig. 1,2,3,4, adds the ADC1 product of common fining agent and still can see the rich iron phase of the thick faller gill shape that isolates matrix, and Eutectic Silicon in Al-Si Cast Alloys is mostly also the bodkin shape.Add the ADC1 product that the novel modifying-refining agent of Al-Ti-B-Ce-La is produced, acicular beta iron disappears mutually substantially.Eutectic Silicon in Al-Si Cast Alloys is refined as rod-short and spherulitic by the bodkin shape.The product tensile strength of producing like this and plasticity and toughness all obviously strengthen.
Claims (5)
1. New Regenerated aluminium modifying-refining agent, it is characterized in that: fining modifier effective constituent is: 92Al-5Ti-1B-1Ce-1La, the massfraction scope of novel modifying-refining agent Al-Ti-B-Ce-La is: 4.5-6.5%Ti, 0.8-1.2%B, 0.6-1.4%Ce, 0.6-1.4%La, surplus is aluminium.
2. New Regenerated aluminium modifying-refining agent according to claim 1, it is characterized in that: the preparation method of described fining agent is:
⑴ select commercial-purity aluminium, K
2TiF
6, KBF
6, AlCe10 alloy, AlLa10 alloy be as raw material;
⑵ with load weighted commercial-purity aluminium, K
2TiF
6, KBF
6, AlCe10 alloy, AlLa10 alloy put into the constant temperature preheating and drying stove dry 2-3 hour of 230-260 ℃;
⑶ add load weighted commercial-purity aluminium in drying oven, 800 ℃ of furnace temperature are set, the energising heating;
⑷ when be warming up to 800 ℃, add load weighted K
2TiF6, KBF
6Mixture fully stirs, and insulation guarantees TiAl
3, TiB
2Particle is distributed in melt more uniformly;
⑸ add AlCe10 alloy, AlLa10 alloy, stirs, and mentioned component is uniformly distributed in melt, standing, when temperature reach 730-800 ℃ skim, degasification, time 3-7 minute;
⑹ cast when temperature reaches 720-750 ℃, is Al-Ti-B-Ce-La New Regenerated aluminium modifying-refining agent after the demoulding.
3. the method for a New Regenerated aluminium modifying-refining agent, it is characterized in that: step is as follows:
⑴ select commercial-purity aluminium, K
2TiF
6, KBF
6, AlCe10 alloy, AlLa10 alloy be as raw material;
⑵ with load weighted commercial-purity aluminium, K
2TiF
6, KBF
6, AlCe10 alloy, AlLa10 alloy put into the constant temperature preheating and drying stove dry 2-3 hour of 230-260 ℃;
⑶ add load weighted commercial-purity aluminium in drying oven, 800 ℃ of furnace temperature are set, the energising heating;
⑷ when be warming up to 800 ℃, add load weighted K
2TiF6, KBF
6Mixture fully stirs, and insulation guarantees TiAl
3, TiB
2Particle is distributed in melt more uniformly;
⑸ add AlCe10 alloy, AlLa10 alloy, stirs, and mentioned component is uniformly distributed in melt, standing, when temperature reach 730-800 ℃ skim, degasification, time 3-7 minute;
⑹ cast when temperature reaches 720-750 ℃, is Al-Ti-B-Ce-La New Regenerated aluminium modifying-refining agent after the demoulding;
Described proportioning raw materials is calculated according to target value and all can be drawn.
4. the method for a melting secondary aluminum, is characterized in that: adopt New Regenerated aluminium modifying-refining agent as claimed in claim 1.
5. the method for melting secondary aluminum according to claim 4 is characterized in that: at first prepares New Regenerated aluminium modifying-refining agent, then utilizes novel modifying-refining agent to produce secondary aluminum,
Utilize the concrete grammar of novel modifying-refining agent production secondary aluminum as follows:
⑴ put into load weighted commercial-purity aluminium, industrial silicon, waste aluminum in the constant temperature preheating and drying stove dry 2-3 hour of 250 ℃;
⑵ add waste aluminum, industrial silicon, commercial-purity aluminium in the accumulation of heat smelting furnace, the igniting heating;
⑶ measure temperature after all raw materials melt fully, when temperature reaches 750 ℃ of left and right, add the refining agent of gross weight 0.2%-0.25%, adjusts nitrogen flow, carries out the degasification slagging-off;
⑷ when reach 730 ℃-750 ℃ when temperature, add the New Regenerated aluminium modifying-refining agent of 0.3-0.5wt%, fully stir, standing, detect composition and adjust;
⑸ composition is qualified, and when temperature reached 680-720 ℃, the casting ingot casting made secondary aluminum.
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| CN103361487A (en) * | 2013-07-22 | 2013-10-23 | 南南铝业股份有限公司 | Production method of recycled aluminum |
| CN104818398A (en) * | 2015-03-23 | 2015-08-05 | 芜湖黄燕实业有限公司 | Aluminum alloy for wheel hub and preparation method thereof, and aluminum alloy wheel hub |
| CN105648251A (en) * | 2016-02-01 | 2016-06-08 | 东南大学 | Preparation method of aluminum, lanthanum and boron grain refiner used for cast aluminum alloy |
| CN104004932B (en) * | 2014-06-03 | 2016-08-24 | 芜湖永达科技有限公司 | A kind of aluminium bits application process in aluminum alloy cylinder cover casts |
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| CN103361487A (en) * | 2013-07-22 | 2013-10-23 | 南南铝业股份有限公司 | Production method of recycled aluminum |
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| CN104004932B (en) * | 2014-06-03 | 2016-08-24 | 芜湖永达科技有限公司 | A kind of aluminium bits application process in aluminum alloy cylinder cover casts |
| CN104818398A (en) * | 2015-03-23 | 2015-08-05 | 芜湖黄燕实业有限公司 | Aluminum alloy for wheel hub and preparation method thereof, and aluminum alloy wheel hub |
| CN105648251A (en) * | 2016-02-01 | 2016-06-08 | 东南大学 | Preparation method of aluminum, lanthanum and boron grain refiner used for cast aluminum alloy |
| CN107661971A (en) * | 2016-07-31 | 2018-02-06 | 浙江跃岭股份有限公司 | A kind of liquefying plant of low pressure casting aluminum alloy wheel hub |
| CN107661971B (en) * | 2016-07-31 | 2023-02-28 | 浙江跃岭股份有限公司 | Liquefying device for low-pressure casting aluminum alloy hub |
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Effective date of registration: 20200522 Address after: 300457 No. 58, Tai Tai Road, west end of Binhai New Area, Tianjin Patentee after: Tianjin xinlizhong alloy Group Co., Ltd Address before: 300457 No. 58, Tai Tai Road, west end of Binhai New Area, Tianjin Patentee before: Tianjin Lizhong Alloy Group Co.,Ltd. |