CN103820668B - High-compactness aluminium-silicon ingots production technique - Google Patents
High-compactness aluminium-silicon ingots production technique Download PDFInfo
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- CN103820668B CN103820668B CN201410101839.4A CN201410101839A CN103820668B CN 103820668 B CN103820668 B CN 103820668B CN 201410101839 A CN201410101839 A CN 201410101839A CN 103820668 B CN103820668 B CN 103820668B
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Abstract
The invention provides a kind of high-compactness aluminium-silicon ingots production technique, can effectively get rid of gas in aluminium liquid, removal of impurity is high, finished product good compactness.Comprise the following steps: A, preparation refining agent: described refining agent, according to weight part, comprises NaCl:25 ~ 35 part, KCl:40 ~ 50 part, sodium aluminum fluoride: 5 ~ 15 parts, CaF
2: 5 ~ 15 parts; Get above component, add appropriate distilled water and stir, after seasoning, carry out processed, can refining agent be obtained for subsequent use; B, recovery aluminium is processed as aluminium ingot, gets metallic silicon power and aluminium ingot according to weight ratio 10% ~ 20%:80% ~ 90%, drop in smelting furnace, temperature remains on 680 ~ 750 DEG C, skims after making aluminium liquid keep molten state; C, be carrier with nitrogen, evenly spray into refining agent from furnace bottom; D, leave standstill 10 minutes, make it precipitate, be vented; Water ingot after E, filtration, get product.
Description
Technical field
The present invention relates to secondary aluminum production process, be specifically related to a kind of aluminium-silicon ingots production technique.
Background technology
Secondary aluminum is the aluminium scrap part retrieved or the scrap stock produced in aluminum products process and aluminium scrap line etc. is main raw material(s), prepares the aluminium ingot meeting all kinds of standard-required produced through melting.This aluminium ingot adopts and reclaims aluminium scrap, and have lower production cost, and it is the recycling of natural resources, there is very strong vitality, particularly in current scientific and technological fast development, today that people's living standard is constantly improved, model change frequency is accelerated, the recovery of waste product and comprehensive utilization have become the important topic of Human Sustainable Development, and secondary aluminum is produced and namely arisen at the historic moment under such form and have fabulous prospect.
Due to the characteristic of aluminium element, aluminium alloy has the tendency of strong generation pore, also very easily produce oxide inclusion simultaneously, pore produces primarily of hydrogen again, in prior art, produce the production technique of aluminium-silicon ingots with secondary aluminum, its exhaust is thorough not, secondary oxidation rate is higher, thus has had a strong impact on final product quality.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of high-compactness aluminium-silicon ingots production technique, and can effectively get rid of gas in aluminium liquid, removal of impurity is high, finished product good compactness.
For solving the problems of the technologies described above, high-compactness aluminium-silicon ingots production technique of the present invention, comprises the following steps:
A, preparation refining agent:
Described refining agent, according to weight part, comprises NaCl:25 ~ 35 part, KCl:40 ~ 50 part, sodium aluminum fluoride: 5 ~ 15 parts, CaF
2: 5 ~ 15 parts; Get above component, add appropriate distilled water and stir, after seasoning, carry out processed, can refining agent be obtained for subsequent use;
B, recovery aluminium is processed as aluminium ingot, gets metallic silicon power and aluminium ingot according to weight ratio 10% ~ 20%:80% ~ 90%, drop in smelting furnace, temperature remains on 680 ~ 750 DEG C, skims after making aluminium liquid keep molten state;
C, be carrier with nitrogen, evenly spray into refining agent from furnace bottom, the part by weight of described refining agent and total furnace charge is 1 ~ 8:100;
D, leave standstill 10 minutes, make it precipitate, be vented;
Water ingot after E, filtration, get product.
Described refining agent, according to weight part, comprises NaCl:35 part, KCl:40 part, sodium aluminum fluoride: 15 parts, CaF
2: 10 parts.
The part by weight of described refining agent and total furnace charge is 6:100.
After have employed technique scheme, its advantage applies exists:
1, refining agent of the present invention is by NaCl, KCl, sodium aluminum fluoride, CaF
2composition, after NaCl and KCl combination, have lower fusing point (about 650 DEG C), refining agent can form fine and close sealing coat on the surface of aluminium liquid, and tissue hyperthermia aluminium liquid contacts with air and generates oxide compound; Sodium aluminum fluoride has the ability of stronger dissolving Al2O3, and CaF2 can improve the surface tension of refining agent, and the refining agent that absorbing oxide is mingled with is convenient to be separated with solution, just can improve its affinability.
2, the present invention take nitrogen as carrier, blows refining agent from furnace bottom, because nitrogen is a kind of rare gas element, form bubble in its uphill process, specific surface area is beaten, and the hydrogen in aluminium liquid diffuses into bubble under the effect of partial pressure difference, and discharge with bubble floating, reach the object of degasification.Bubble can also dross inclusion adsorption in the process floated, and plays the effect of deslagging.
3, above-mentioned process costs is cheap, and processing condition are easy to control, and can realize suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is the structure figure reclaiming the aluminium ingot that aluminium is produced with common process;
Fig. 2 is the structure figure of the aluminium ingot that embodiments of the invention one are produced;
Fig. 3 is the structure figure of the aluminium ingot that embodiments of the invention two are produced;
Fig. 4 is the structure figure of the aluminium ingot that embodiments of the invention three are produced.
Embodiment
Embodiment one
A, preparation refining agent:
Get NaCl:30kg, KCl:45kg, sodium aluminum fluoride: 10kg, CaF
2: 15kg; Add appropriate distilled water to stir, carry out processed after seasoning, obtained refining agent is for subsequent use.
Described sodium aluminum fluoride molecular formula is Na
3alF
6, sodium aluminum fluoride has stronger dissolving Al
2o
3ability, add in refining agent, can prevent and destroy Al
2o
3formation, thus reduce the formation of Reoxides in aluminium liquid.
B, recovery aluminium is processed as aluminium ingot, gets metallic silicon power 100kg, aluminium ingot 900kg, drop in smelting furnace, temperature remains on 680 ~ 750 DEG C, skims after making aluminium liquid keep molten state.
C, be carrier with nitrogen, evenly spray into refining agent from furnace bottom, described refining agent consumption is 50kg.
D, leave standstill 10 minutes, make it precipitate, be vented;
Water ingot after E, filtration, get product.
Embodiment two
A, preparation refining agent:
Get and comprise NaCl:35kg, KCl:40kg, sodium aluminum fluoride: 15kg, CaF
2: 10kg; Add appropriate distilled water to stir, carry out processed after seasoning, obtained refining agent is for subsequent use.
B, recovery aluminium is processed as aluminium ingot, gets metallic silicon power 200kg, aluminium ingot 800kg, drop in smelting furnace, temperature remains on 680 ~ 750 DEG C, skims after making aluminium liquid keep molten state.
C, be carrier with nitrogen, evenly spray into refining agent from furnace bottom, described refining agent consumption is 64kg.
D, leave standstill 10 minutes, make it precipitate, be vented;
Water ingot after E, filtration, get product.
Embodiment three
A, preparation refining agent:
Get and comprise NaCl:35kg, KCl:40kg, sodium aluminum fluoride: 15kg, CaF
2: 10kg; Add appropriate distilled water to stir, carry out processed after seasoning, obtained refining agent is for subsequent use.
B, recovery aluminium is processed as aluminium ingot, gets metallic silicon power 150kg, aluminium ingot 850kg, drop in smelting furnace, temperature remains on 680 ~ 750 DEG C, skims after making aluminium liquid keep molten state.
C, be carrier with nitrogen, evenly spray into refining agent from furnace bottom, described refining agent consumption is 60kg.
D, leave standstill 10 minutes, make it precipitate, be vented;
Water ingot after E, filtration, get product.
The product that above-described embodiment is produced reaches following index after testing:
As can be seen from the structure in accompanying drawing, after adopting the present invention, the high-compactness aluminium-silicon ingots produced, its inclusion rates, void content all significantly decline, and possess high density and physicochemical property.
As seen from Figure 4, in embodiment three, refining agent, according to weight part, comprises NaCl:35 part, KCl:40 part, sodium aluminum fluoride: 15 parts, CaF
2: 10 parts.Metallic silicon power and aluminium ingot ratio are 1.5:85, and the part by weight of refining agent consumption and total furnace charge is 6:100, its best results reached.
Claims (3)
1. a high-compactness aluminium-silicon ingots production technique, comprises the following steps:
A, preparation refining agent:
Described refining agent, according to weight part, comprises NaCl:25 ~ 35 part, KCl:40 ~ 50 part, sodium aluminum fluoride: 5 ~ 15 parts, CaF
2: 5 ~ 15 parts; Get above component, add appropriate distilled water and stir, after seasoning, carry out processed, can refining agent be obtained for subsequent use;
B, recovery aluminium is processed as aluminium ingot, gets metallic silicon power and aluminium ingot according to weight ratio 10% ~ 20%:80% ~ 90%, drop in smelting furnace, temperature remains on 680 ~ 750 DEG C, skims after making aluminium liquid keep molten state;
C, be carrier with nitrogen, evenly spray into refining agent from furnace bottom, the part by weight of described refining agent and total furnace charge is 1 ~ 8:100;
D, leave standstill 10 minutes, make it precipitate, be vented;
Water ingot after E, filtration, get product.
2. high-compactness aluminium-silicon ingots production technique as claimed in claim 1, is characterized in that: described refining agent, according to weight part, comprises NaCl:35 part, KCl:40 part, sodium aluminum fluoride: 15 parts, CaF
2: 10 parts.
3. high-compactness aluminium-silicon ingots production technique as claimed in claim 1 or 2, is characterized in that: the part by weight of described refining agent and total furnace charge is 6:100.
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| CN201410101839.4A CN103820668B (en) | 2014-03-19 | 2014-03-19 | High-compactness aluminium-silicon ingots production technique |
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| CN103820668B true CN103820668B (en) | 2016-04-06 |
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| CN105132731B (en) * | 2015-09-30 | 2017-12-26 | 晟通科技集团有限公司 | Aluminium and aluminium alloy smelting coverture and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538667A (en) * | 2008-08-29 | 2009-09-23 | 中山市三丰金属锻造有限公司 | High-strength and wear-resistant cocrystallized Al-Si alloy forging stock material and preparation method thereof |
| CN101845558A (en) * | 2010-02-09 | 2010-09-29 | 中南大学 | Aluminum slag separating agent and application of same in process of recycling aluminum from aluminum slag |
| CN103255304A (en) * | 2013-05-17 | 2013-08-21 | 山东创新金属科技股份有限公司 | Interior purification technology for molten aluminum smelter |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538667A (en) * | 2008-08-29 | 2009-09-23 | 中山市三丰金属锻造有限公司 | High-strength and wear-resistant cocrystallized Al-Si alloy forging stock material and preparation method thereof |
| CN101845558A (en) * | 2010-02-09 | 2010-09-29 | 中南大学 | Aluminum slag separating agent and application of same in process of recycling aluminum from aluminum slag |
| CN103255304A (en) * | 2013-05-17 | 2013-08-21 | 山东创新金属科技股份有限公司 | Interior purification technology for molten aluminum smelter |
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Denomination of invention: Production process of high-density aluminum silicon alloy ingots Effective date of registration: 20230815 Granted publication date: 20160406 Pledgee: Taihu sub branch of China Construction Bank Co.,Ltd. Pledgor: TAIHU GUANGHUA ALUMINIUM INDUSTRY Co.,Ltd. Registration number: Y2023980052124 |