CN103820668A - Technology for producing high-density aluminum-silicon alloy ingot - Google Patents
Technology for producing high-density aluminum-silicon alloy ingot Download PDFInfo
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- CN103820668A CN103820668A CN201410101839.4A CN201410101839A CN103820668A CN 103820668 A CN103820668 A CN 103820668A CN 201410101839 A CN201410101839 A CN 201410101839A CN 103820668 A CN103820668 A CN 103820668A
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Abstract
The invention provides a technology for producing a high-density aluminum-silicon alloy ingot. A gas in molten aluminum can be effectively removed, and the technology is high in impurity removal rate and good in product density. The technology comprises the following steps: preparing a refining agent which comprises the following components in parts by weight: 25-35 parts of NaCl, 40-50 parts of KCl, 5-15 parts of cryolite, and 5-15 parts of CaF2, namely, taking the components, and adding proper distilled water to evenly agitate; carrying out dehydration after naturally drying, so as to prepare the refining agent for later use; B, processing recovered aluminum into an aluminum ingot, taking metal silicon powder and the aluminum ingot according to the weight ratio of 10-20% to 80-90%, feeding to a smelting furnace, keeping the temperature at 680-750 DEG C, and drossing after keeping the molten aluminum into the molten state; C, with nitrogen as a carrier, evenly spraying the refining agent from the bottom of the smelting furnace; D, standing for 10 minutes to precipitate and exhaust; and E, casting the ingot after filtering, so as to obtain the finished 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 be the aluminium scrap part retrieved or scrap stock and the aluminium scrap line etc. produced in aluminum products process be main raw material(s), prepare the aluminium ingot that meets all kinds of standard-requireds of producing through melting.This aluminium ingot adopts and reclaims aluminium scrap, and there is 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 under such form, arisen at the historic moment 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 is mainly produced by 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, thereby 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, can effectively get rid of gas in aluminium liquid, and 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 is 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 to stir, after seasoning, carry out processed, can make refining agent for subsequent use;
B, recovery aluminium is processed as to 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 ℃, makes aluminium liquid keep skimming after molten state;
C, take nitrogen as carrier, evenly spray into refining agent from furnace bottom, described refining agent is 1 ~ 8:100 with the part by weight of total furnace charge;
D, leave standstill 10 minutes, make its precipitation, exhaust;
After E, filtration, water ingot, 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.
Described refining agent is 6:100 with the part by weight of total furnace charge.
Adopted after 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, has lower fusing point (650 ℃ of left and right), and 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, makes the refining agent that absorbing oxide is mingled be convenient to separate 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, in its uphill process, form bubble, specific surface area is beaten, and the hydrogen in aluminium liquid diffuses into bubble under the effect of partial pressure difference, and with bubble floating discharge, reach the object of degasification.Bubble can also dross inclusion adsorption in the process of floating, 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 that reclaims the aluminium ingot of aluminium production with common process;
Fig. 2 is the structure figure of the aluminium ingot produced of embodiments of the invention one;
Fig. 3 is the structure figure of the aluminium ingot produced of embodiments of the invention two;
Fig. 4 is the structure figure of the aluminium ingot produced of embodiments of the invention three.
Embodiment
Embodiment mono-
A, preparation refining agent:
Get NaCl:30kg, KCl:45kg, sodium aluminum fluoride: 10kg, CaF
2: 15kg; Add appropriate distilled water to stir, after seasoning, carry out processed, make refining agent 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, thereby reduce the formation of Reoxides in aluminium liquid.
B, recovery aluminium is processed as to aluminium ingot, gets metallic silicon power 100kg, aluminium ingot 900kg, drops in smelting furnace, and temperature remains on 680 ~ 750 ℃, makes aluminium liquid keep skimming after molten state.
C, take nitrogen as carrier, evenly spray into refining agent from furnace bottom, described refining agent consumption is 50kg.
D, leave standstill 10 minutes, make its precipitation, exhaust;
After E, filtration, water ingot, get product.
Embodiment bis-
A, preparation refining agent:
Get and comprise NaCl:35kg, KCl:40kg, sodium aluminum fluoride: 15kg, CaF
2: 10kg; Add appropriate distilled water to stir, after seasoning, carry out processed, make refining agent for subsequent use.
B, recovery aluminium is processed as to aluminium ingot, gets metallic silicon power 200kg, aluminium ingot 800kg, drops in smelting furnace, and temperature remains on 680 ~ 750 ℃, makes aluminium liquid keep skimming after molten state.
C, take nitrogen as carrier, evenly spray into refining agent from furnace bottom, described refining agent consumption is 64kg.
D, leave standstill 10 minutes, make its precipitation, exhaust;
After E, filtration, water ingot, get product.
Embodiment tri-
A, preparation refining agent:
Get and comprise NaCl:35kg, KCl:40kg, sodium aluminum fluoride: 15kg, CaF
2: 10kg; Add appropriate distilled water to stir, after seasoning, carry out processed, make refining agent for subsequent use.
B, recovery aluminium is processed as to aluminium ingot, gets metallic silicon power 150kg, aluminium ingot 850kg, drops in smelting furnace, and temperature remains on 680 ~ 750 ℃, makes aluminium liquid keep skimming after molten state.
C, take nitrogen as carrier, evenly spray into refining agent from furnace bottom, described refining agent consumption is 60kg.
D, leave standstill 10 minutes, make its precipitation, exhaust;
After E, filtration, water ingot, get product.
The product that above-described embodiment is produced reaches following index after testing:
Structure from accompanying drawing can be found out, adopts after the present invention, and the high-compactness aluminium-silicon ingots of producing, its inclusion rates, void content all significantly decline, and possess high density and physicochemical property.
As seen from Figure 4, in embodiment tri-, 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 refining agent consumption is 6:100 with the part by weight of total furnace charge, the best results that it reaches.
Claims (3)
1. a high-compactness aluminium-silicon ingots production technique, comprises the following steps:
A, preparation refining agent:
Described refining agent is 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 to stir, after seasoning, carry out processed, can make refining agent for subsequent use;
B, recovery aluminium is processed as to 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 ℃, makes aluminium liquid keep skimming after molten state;
C, take nitrogen as carrier, evenly spray into refining agent from furnace bottom, described refining agent is 1 ~ 8:100 with the part by weight of total furnace charge;
D, leave standstill 10 minutes, make its precipitation, exhaust;
After E, filtration, water ingot, 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: described refining agent is 6:100 with the part by weight of total furnace charge.
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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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| CN201410101839.4A CN103820668B (en) | 2014-03-19 | 2014-03-19 | High-compactness aluminium-silicon ingots production technique |
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| CN103820668A true CN103820668A (en) | 2014-05-28 |
| CN103820668B CN103820668B (en) | 2016-04-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105132731A (en) * | 2015-09-30 | 2015-12-09 | 湖南创元铝业有限公司 | Covering agent for aluminum and aluminum alloy smelting and preparing method of covering agent |
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 |
-
2014
- 2014-03-19 CN CN201410101839.4A patent/CN103820668B/en active Active
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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105132731A (en) * | 2015-09-30 | 2015-12-09 | 湖南创元铝业有限公司 | Covering agent for aluminum and aluminum alloy smelting and preparing method of covering agent |
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| CN103820668B (en) | 2016-04-06 |
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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 |