CN103255304A - Interior purification technology for molten aluminum smelter - Google Patents
Interior purification technology for molten aluminum smelter Download PDFInfo
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- CN103255304A CN103255304A CN2013101837733A CN201310183773A CN103255304A CN 103255304 A CN103255304 A CN 103255304A CN 2013101837733 A CN2013101837733 A CN 2013101837733A CN 201310183773 A CN201310183773 A CN 201310183773A CN 103255304 A CN103255304 A CN 103255304A
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- refining
- aluminium liquid
- smelting furnace
- refining agent
- purification techniques
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Abstract
The invention provides an interior purification technology for a molten aluminum smelter. The interior purification technology comprises two times of refining and three times of drossing, wherein before refining, a refining agent is added, in the refining process, powder is sprayed in the smelter to be refined, the refining agent is sprayed into molten aluminum in the smelter by a powder blower, and argon is aerated for degassing. According to the interior purification technology, the cleanliness of electrolytic molten aluminum is improved, the hydrogen content of the processed molten aluminum is lower than 0.125ml/100gAl, the deslagging ratio reaches above 85%, the problems of looseness and slag inclusion caused by aluminum alloy ingot casting are solved, and the product percent of pass is greatly increased.
Description
Technical field
The present invention relates to the aluminium alloy casting technical field, particularly relate to purification techniques in a kind of aluminium liquid smelting furnace.
Background technology
In the aluminium alloy casting process, usually through feeding intake-refining-skim-leave standstill-cast and wait processing step, the quality of final alloy product, key is the size of gas content in the aluminium alloy and foreign matter content what and grain fineness number, the process of refining is exactly with Impurity removals such as the gas in the aluminium liquid and iron, process with the purification of aluminium liquid, in the production process of aluminium alloy, occupy critical role, prior art adopts initial refining, selecting for use for the removal of impurity of the technology controlling and process of refining and refining agent is particularly crucial, and degasification slagging-off is not thorough, and it is loose to tend to cause aluminium alloy cast ingot to produce, dreg defect, product percent of pass reduces.How fully reducing the hydrogen content in the aluminium liquid, the ferrous contaminants in the aluminium liquid is further removed, obtain high-quality Al-alloy products, is present urgent problem.
Summary of the invention
Purpose of the present invention is exactly to provide purification techniques in a kind of aluminium liquid smelting furnace at the defective of above-mentioned existence.This technology comprises twice refining and three technology of skimming, and wherein, adds refining agent before refining, in refining process, adopts injection refining in the stove, uses duster that refining agent is sprayed in the aluminium liquid in the smelting furnace, and feeds argon gas and carry out degasification.This purification techniques has improved the cleanliness factor of electrolytic aluminium liquid, and hydrogen richness is lower than 0.125ml/100gAl in the aluminium liquid after feasible the processing, and the slagging-off rate reaches more than 85%, has reduced loose, slag inclusion problem that aluminium alloy cast ingot produces, has improved product percent of pass greatly.
Purification techniques in a kind of aluminium liquid smelting furnace of the present invention, technical scheme is: comprise twice refining and three technology of skimming, wherein, add refining agent in refining process.
In refining process, adopt injection refining in the stove, use duster that refining agent is sprayed in the aluminium liquid in the smelting furnace.
In refining process, feed argon gas and carry out degasification.
Detailed process is for skimming-refining-skim-refining-skim, and refining for the first time is for to be adjusted at the 600-700 degree with temperature, and the adding refining agent reacted 10-30 minute; Refining for the second time adds refining agent for temperature is adjusted into the 710-800 degree, reacts 10-20 minute.
Preferred version is: refining for the first time adds refining agent for temperature being adjusted at 700 degree, reacts 20 minutes; Refining for the second time adds refining agent for temperature being adjusted into 750 degree, reacts 15 minutes.
Described refining agent is grouped into by following one-tenth by weight: NaCl:20-45%, KCl:25-30%, CaF
2: 1-5%, Na
2SO
4: 1-5%, Na
3AlF
6: 15-43%.
The following one-tenth that described refining agent screening formulation is served as reasons by weight is grouped into: NaCl:28%, KCl:28%, CaF
2: Na 3%,
2SO
4: Na 3%,
3AlF
6: 38 %.
Beneficial effect of the present invention is: purification techniques is applied to the electrolytic aluminium liquid purification in this aluminium liquid smelting furnace, comprise twice refining and three technology of skimming, wherein, before refining, add refining agent, in refining process, adopt injection refining in the stove, use duster that refining agent is sprayed in the aluminium liquid in the smelting furnace, use argon gas to carry refining agent.Described refining agent is grouped into by following one-tenth by weight: NaCl:20-45%, KCl:25-30%, CaF
2: 1-5%, Na
2SO
4: 1-5%, Na
3AlF
6: 15-43%.This purification techniques has improved the cleanliness factor of electrolytic aluminium liquid, and hydrogen richness is lower than 0.125ml/100gAl in the aluminium liquid after feasible the processing, and the slagging-off rate reaches more than 85%, has improved quality product, and product percent of pass is not less than 98%.Reduce loose, slag inclusion problem that aluminium alloy cast ingot produces, improved product percent of pass greatly.
Embodiment:
In order to understand the present invention better, describe technical scheme of the present invention in detail with specific examples below, but the present invention is not limited thereto.
Embodiment 1
Purification techniques in this aluminium liquid smelting furnace comprises twice refining and three technology of skimming, and wherein, adds refining agent in refining process.Refining process adopts injection refining in the stove, uses duster that refining agent is sprayed in the aluminium liquid in the smelting furnace, feeds argon gas simultaneously and carries out degasification.
Detailed process is for skimming-refining-skim-refining-skim, and refining for the first time adds refining agent for temperature being adjusted at 700 degree, reacts 20 minutes; Refining for the second time adds refining agent for temperature being adjusted into 750 degree, reacts 15 minutes.
Described refining agent is grouped into by following one-tenth by weight: NaCl:28%, KCl:28%, CaF
2: Na 3%,
2SO
4: Na 3%,
3AlF
6: 38 %.
This purification techniques has improved the cleanliness factor of electrolytic aluminium liquid, and hydrogen richness is lower than 0.12ml/100gAl in the aluminium liquid after feasible the processing, and the slagging-off rate reaches more than 95%, has improved quality product, and product percent of pass reaches 99.2%.
Embodiment 2
Purification techniques in this aluminium liquid smelting furnace comprises twice refining and three technology of skimming, and wherein, adds refining agent in refining process.Refining process adopts injection refining in the stove, uses duster that refining agent is sprayed in the aluminium liquid in the smelting furnace, feeds argon gas simultaneously and carries out degasification.
Detailed process is for skimming-refining-skim-refining-skim, and refining for the first time adds refining agent for temperature being adjusted at 690 degree, reacts 25 minutes; Refining for the second time adds refining agent for temperature being adjusted into 780 degree, reacts 12 minutes.
Described refining agent is grouped into by following one-tenth by weight: NaCl:42%, KCl:25%, CaF
2: Na 1%,
2SO
4: Na 5%,
3AlF
6: 27 %.
This purification techniques has improved the cleanliness factor of electrolytic aluminium liquid, and hydrogen richness is lower than 0.125ml/100gAl in the aluminium liquid after feasible the processing, and the slagging-off rate reaches more than 87%, has improved quality product, and product percent of pass reaches 98.8%.
Embodiment 3
Purification techniques in this aluminium liquid smelting furnace comprises twice refining and three technology of skimming, and wherein, adds refining agent in refining process.Refining process adopts injection refining in the stove, uses duster that refining agent is sprayed in the aluminium liquid in the smelting furnace, feeds argon gas simultaneously and carries out degasification.
Detailed process is for skimming-refining-skim-refining-skim, and refining for the first time adds refining agent for temperature being adjusted at 650 degree, reacts 30 minutes; Refining for the second time adds refining agent for temperature being adjusted into 720 degree, reacts 20 minutes.
Described refining agent is grouped into by following one-tenth by weight: NaCl:30%, KCl:26%, CaF
2: Na 5%,
2SO
4: Na 2%,
3AlF
6: 37 %.
This purification techniques has improved the cleanliness factor of electrolytic aluminium liquid, and hydrogen richness is lower than 0.125ml/100gAl in the aluminium liquid after feasible the processing, and the slagging-off rate reaches more than 85%, has improved quality product, and product percent of pass reaches 98%.
Embodiment 4
Purification techniques in this aluminium liquid smelting furnace comprises twice refining and three technology of skimming, and wherein, adds refining agent in refining process.Refining process adopts injection refining in the stove, uses duster that refining agent is sprayed in the aluminium liquid in the smelting furnace, feeds argon gas simultaneously and carries out degasification.
Detailed process is for skimming-refining-skim-refining-skim, and refining for the first time adds refining agent for temperature being adjusted at 620 degree, reacts 30 minutes; Refining for the second time adds refining agent for temperature being adjusted into 800 degree, reacts 10 minutes.
Described refining agent is grouped into by following one-tenth by weight: NaCl:20%, KCl:30%, CaF
2: Na 2%,
2SO
4: Na 3%,
3AlF
6: 43 %.
This purification techniques has improved the cleanliness factor of electrolytic aluminium liquid, and hydrogen richness is lower than 0.125ml/100gAl in the aluminium liquid after feasible the processing, and the slagging-off rate reaches more than 85%, has improved quality product, and product percent of pass reaches 98%.
Embodiment 5
Purification techniques in this aluminium liquid smelting furnace comprises twice refining and three technology of skimming, and wherein, adds refining agent in refining process.Refining process adopts injection refining in the stove, uses duster that refining agent is sprayed in the aluminium liquid in the smelting furnace, feeds argon gas simultaneously and carries out degasification.
Detailed process is for skimming-refining-skim-refining-skim, and refining for the first time adds refining agent for temperature being adjusted at 680 degree, reacts 23 minutes; Refining for the second time adds refining agent for temperature being adjusted into 730 degree, reacts 17 minutes.
Described refining agent is grouped into by following one-tenth by weight: NaCl:35%, KCl:26%, CaF
2: Na 3%,
2SO
4: Na 5%,
3AlF
6: 31%.
This purification techniques has improved the cleanliness factor of electrolytic aluminium liquid, and hydrogen richness is lower than 0.12ml/100gAl in the aluminium liquid after feasible the processing, and the slagging-off rate reaches more than 89%, has improved quality product, and product percent of pass reaches 99%.
Claims (7)
1. the interior purification techniques of aluminium liquid smelting furnace is characterized in that, comprises twice refining and three technology of skimming, and wherein, adds refining agent in refining process.
2. purification techniques in the aluminium liquid smelting furnace according to claim 1 is characterized in that, in refining process, adopts injection refining in the stove, uses duster that refining agent is sprayed in the aluminium liquid in the smelting furnace.
3. purification techniques in the aluminium liquid smelting furnace according to claim 2 is characterized in that, in refining process, feeds argon gas and carries out degasification.
4. purification techniques in the aluminium liquid smelting furnace according to claim 1 is characterized in that, detailed process is for skimming-refining-skim-refining-skim, and refining for the first time is for to be adjusted at the 600-700 degree with temperature, and the adding refining agent reacted 10-30 minute; Refining for the second time adds refining agent for temperature is adjusted into the 710-800 degree, reacts 10-20 minute.
5. purification techniques in the aluminium liquid smelting furnace according to claim 4 is characterized in that, refining for the first time adds refining agent for temperature being adjusted at 700 degree, reacts 20 minutes; Refining for the second time adds refining agent for temperature being adjusted into 750 degree, reacts 15 minutes.
6. purification techniques in the aluminium liquid smelting furnace according to claim 1 is characterized in that described refining agent is grouped into by following one-tenth by weight: NaCl:20-45%, KCl:25-30%, CaF
2: 1-5%, Na
2SO
4: 1-5%, Na
3AlF
6: 15-43%.
7. purification techniques in the aluminium liquid smelting furnace according to claim 6 is characterized in that described refining agent is grouped into by following one-tenth by weight: NaCl:28%, KCl:28%, CaF
2: Na 3%,
2SO
4: Na 3%,
3AlF
6: 38 %.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101837733A CN103255304A (en) | 2013-05-17 | 2013-05-17 | Interior purification technology for molten aluminum smelter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101837733A CN103255304A (en) | 2013-05-17 | 2013-05-17 | Interior purification technology for molten aluminum smelter |
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| CN103255304A true CN103255304A (en) | 2013-08-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820668A (en) * | 2014-03-19 | 2014-05-28 | 太湖县光华铝业有限公司 | Technology for producing high-density aluminum-silicon alloy ingot |
| CN111500886A (en) * | 2020-06-12 | 2020-08-07 | 包头常铝北方铝业有限责任公司 | Aluminum alloy refining and slagging-off method |
| CN114672666A (en) * | 2022-04-06 | 2022-06-28 | 中南大学 | Method for deeply purifying aluminum alloy melt by heating inert gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871052A (en) * | 2010-06-28 | 2010-10-27 | 江阴新仁科技有限公司 | Method for purifying aluminum and aluminum alloy melt |
| CN101967565A (en) * | 2010-10-28 | 2011-02-09 | 湖南晟通科技集团有限公司 | Refining agent for aluminum and aluminum alloy |
-
2013
- 2013-05-17 CN CN2013101837733A patent/CN103255304A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871052A (en) * | 2010-06-28 | 2010-10-27 | 江阴新仁科技有限公司 | Method for purifying aluminum and aluminum alloy melt |
| CN101967565A (en) * | 2010-10-28 | 2011-02-09 | 湖南晟通科技集团有限公司 | Refining agent for aluminum and aluminum alloy |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820668A (en) * | 2014-03-19 | 2014-05-28 | 太湖县光华铝业有限公司 | Technology for producing high-density aluminum-silicon alloy ingot |
| 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 |
| CN111500886A (en) * | 2020-06-12 | 2020-08-07 | 包头常铝北方铝业有限责任公司 | Aluminum alloy refining and slagging-off method |
| CN114672666A (en) * | 2022-04-06 | 2022-06-28 | 中南大学 | Method for deeply purifying aluminum alloy melt by heating inert gas |
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Application publication date: 20130821 |