CN108342603A - A kind of aluminum melt removing sodium - Google Patents
A kind of aluminum melt removing sodium Download PDFInfo
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- CN108342603A CN108342603A CN201810465214.4A CN201810465214A CN108342603A CN 108342603 A CN108342603 A CN 108342603A CN 201810465214 A CN201810465214 A CN 201810465214A CN 108342603 A CN108342603 A CN 108342603A
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- melt
- sodium
- smelting furnace
- temperature
- dross
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
Abstract
The present invention relates to alloy refining technical field, more particularly to a kind of aluminum melt removing sodium, it is intended to improve and remove sodium effect, while reduce process costs and time cost.Its key step is as follows：S1：Alloy is added in smelting furnace, heating is smelted into melt；S2：Temperature of smelting furnace is risen to 710 725 DEG C, control temperature is stablized, and sodium element oxidation is made to generate oxidation scum；S3：Continue to heat, increases temperature to 725 740 DEG C, close smelting furnace fire door, use nitrogen injection melt；S4：Melt is stood；S5：It skims, the aluminium alloy melt after obtaining except sodium.It, which is reacted by sodium element at high temperature with oxygen, generates oxidation scum, and so that sodium element is reacted with nitrogen under closed hot conditions and generate sodium azide dross, to make sodium element swim in aluminium melt surface in the form of dross, then dross is dragged for and is gone, you can obtained except the aluminium alloy melt after sodium.
Description
Technical field
The present invention relates to alloy refining technical field, more particularly to a kind of aluminum melt removing sodium.
Background technology
Sodium is one of the trace element in aluminum melt, although content is seldom, it casts processing performance to aluminium alloy
Influence it is very big, be especially affected to what is cracked when the fire check of the high aluminium alloy cast ingot containing magnesium and hot rolling.Sodium conduct
Low-melting impurities are present in alloy, and are present in crystal boundary with free state, in the case where its content is little, can also expand knot
The lower limit temperature of brittle zone during crystalline substance reduces the intensity and elongation percentage of brittle zone.When alloy shrinkage stress is more than that its own is strong
When spending, just ingot casting is caused to crack.
In the prior art, generally in refining aluminium fusant, using except sodium refining agent refine except sodium, but this refining
Technique is poor except sodium effect, and to reach technic index requirement, refining need to generally be repeated several times, time-consuming and laborious, and refining cost is high.
Invention content
The purpose of the present invention is to provide a kind of aluminum melt removing sodiums, it is intended to improve and remove sodium effect, while reduce technique
Cost and time cost.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of aluminum melt removing sodium, includes the following steps：
S1：Alloy is added in smelting furnace, heating is smelted into melt；
S2：Temperature of smelting furnace is risen to 710-725 DEG C, control temperature is stablized, and sodium element oxidation is made to generate oxidation scum；
S3：Continue to heat, increases temperature to 725-740 DEG C, close smelting furnace fire door, use nitrogen injection melt；
S4：Melt is stood；
S5：It skims, the aluminium alloy melt after obtaining except sodium.
Further, controlled at 720 DEG C in S2, and 10min is maintained.
Further, temperature is increased in S3 to 730 DEG C.
Further, the nitrogen injection time is 30min in S3.
Further, increase S2 ' between S2 and S3：Ammonium acrylate and accelerating agent, stirring are added into melt.
Further, the accelerating agent is ammonium nilrite.
The invention has the advantages that：
1. by the state of oven door opening, to furnace heats, melt temperature in smelting furnace is set to be increased to 710 DEG C, and control
Temperature processed is stablized, and 10min is maintained.Other metallic elements are compared to, sodium element is more active, oxidizable, when to being melted in smelting furnace
When volumetric combustion heats, sodium is contacted with the oxygen in air, generates oxidation scum, so as to reduce the part sodium member in aluminium alloy
Element.
2. the nitrogen-blow into aluminum melt, makes nitrogen react with sodium element, sodium element is consumed with this.In closed height
In the environment of temperature isolation, the sodium element in melt reacts with nitrogen, generates sodium azide NaN3, under high temperature, sodium azide
Molten aluminum surface is swum in the form of dross, so as to be further reduced the sodium element content in aluminium alloy melt；
3. ammonium acrylate is added into melt under conditions of ammonium nilrite does accelerating agent by the present invention, the sodium member in melt
Element is reacted with ammonium acrylate generates sodium acrylate, and one-step polymerization of going forward side by side is Sodium Polyacrylate.Sodium Polyacrylate is as a kind of novel
Functional high molecule material mutually generates cross-bond between molecule, forms polymer, and the sodium element enabled aluminum alloy in melt is turned
It moves in Sodium Polyacrylate, to reduce the part sodium element in aluminium alloy melt.And sodium acrylate and ammonium acrylate copolymer
With certain viscosity, floccule is formed in melt, and is gradually floated to melt upper surface, and dross fishing is gone later, is obtained
To except the aluminum melt after sodium.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with specific embodiment.Obviously, described
Embodiment be only the present invention a part of the embodiment, instead of all the embodiments.Based on the embodiment of the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained without creative efforts, belongs to guarantor of the present invention
The range of shield.
The present invention discloses a kind of aluminum melt removing sodium, specific implementation mode is as follows.
Embodiment 1
S1：The ADC12 aluminium alloys that weight is one ton are put into smelting furnace and are heated, aluminium alloy when temperature is increased to 600 DEG C
Start to melt, melt is obtained after aluminium alloy is completely melt.
S2：Continue to furnace heats, fire door in opened condition, makes melt temperature in smelting furnace be increased to 710 DEG C, and control temperature
Degree is stablized, and maintains 10min, the sodium element in melt is made fully to react.Other metallic elements are compared to, sodium element is more active,
Its is oxidizable, and in smelting furnace when melt combustion heating, sodium is contacted with the oxygen in air, generates oxidation scum, so as to
Reduce the part sodium element in aluminium alloy.
S2’：10kg ammonium acrylates and the accelerating agent ammonium nilrite of 0.8kg are added into melt, and is sufficiently stirred melt,
The sodium element in melt is set to be come into full contact with ammonium acrylate.Under conditions of ammonium nilrite does accelerating agent, the sodium element in melt
It is reacted with ammonium acrylate and generates sodium acrylate, one-step polymerization of going forward side by side is Sodium Polyacrylate.Sodium Polyacrylate is as a kind of novel work(
Can high molecular material, cross-bond is mutually generated between molecule, forms polymer, the sodium element enabled aluminum alloy in melt is transferred
Into Sodium Polyacrylate, to reduce the part sodium element in aluminium alloy melt.And sodium acrylate has with ammonium acrylate copolymer
There is certain viscosity, form floccule in melt, and is gradually floated to melt upper surface.
S3：Continue to make melt temperature be increased to 725 DEG C furnace heats in the state of oven door opening；Later, it closes molten
Furnace door uses nitrogen injection melt 30min.Before using nitrogen injection, confirm whether nitrogen is sufficient, and whether pipeline is unimpeded,
Whether there is or not damages；And check that nitrogen gas purity is shown in 99.999, and nitrogen pressure force value confirms between 0.20-0.3Mpa.
In the environment of closed high temperature completely cuts off, the sodium element in melt reacts with nitrogen, generates sodium azide NaN3,
Under high temperature, sodium azide swims in molten aluminum surface in the form of dross, so as to the sodium member being further reduced in aluminium alloy melt
Cellulose content.
S4：So that melt in smelting furnace is stood 20min, waits for oxidation scum, Sodium Polyacrylate, sodium acrylate and the acrylic acid of sodium
The copolymer of ammonium and the nitride dross of sodium swim in aluminium melt surface.
S5：After dross swims in aluminium melt surface, operation of skimming is carried out, by slag bucket and melting furnace door is emitted into when skimming
Mouthful, slag rake is provoked to 2m height with fork truck, is steadily entered in smelting furnace, is taken off outward from smelting furnace innermost end, dross is taken off to stove
Then dross is all grilled into slag bucket by platform, the aluminium alloy melt after obtaining except sodium, and the melt is taken to carry out sodium element detection.
Embodiment 2
S1：The ADC12 aluminium alloys that weight is one ton are put into smelting furnace and are heated, aluminium alloy when temperature is increased to 600 DEG C
Start to melt, melt is obtained after aluminium alloy is completely melt.
S2：Continue to furnace heats, fire door in opened condition, makes melt temperature in smelting furnace be increased to 720 DEG C, and control temperature
Degree is stablized, and maintains 10min, the sodium element in melt is made fully to react.Other metallic elements are compared to, sodium element is more active,
Its is oxidizable, and in smelting furnace when melt combustion heating, sodium is contacted with the oxygen in air, generates oxidation scum, so as to
Reduce the part sodium element in aluminium alloy.
S2’：8kg ammonium acrylates and the accelerating agent ammonium nilrite of 0.5kg are added into melt, and is sufficiently stirred melt,
The sodium element in melt is set to be come into full contact with ammonium acrylate.Under conditions of ammonium nilrite does accelerating agent, the sodium element in melt
It is reacted with ammonium acrylate and generates sodium acrylate, one-step polymerization of going forward side by side is Sodium Polyacrylate.Sodium Polyacrylate is as a kind of novel work(
Can high molecular material, cross-bond is mutually generated between molecule, forms polymer, the sodium element enabled aluminum alloy in melt is transferred
Into Sodium Polyacrylate, to reduce the part sodium element in aluminium alloy melt.And sodium acrylate has with ammonium acrylate copolymer
There is certain viscosity, form floccule in melt, and is gradually floated to melt upper surface.
S3：Continue to make melt temperature be increased to 730 DEG C furnace heats in the state of oven door opening；Later, it closes molten
Furnace door uses nitrogen injection melt 30min.Before using nitrogen injection, confirm whether nitrogen is sufficient, and whether pipeline is unimpeded,
Whether there is or not damages；And check that nitrogen gas purity is shown in 99.999, and nitrogen pressure force value confirms between 0.20-0.3Mpa.
In the environment of closed high temperature completely cuts off, the sodium element in melt reacts with nitrogen, generates sodium azide NaN3,
Under high temperature, sodium azide swims in molten aluminum surface in the form of dross, so as to the sodium member being further reduced in aluminium alloy melt
Cellulose content.
S4：So that melt in smelting furnace is stood 20min, waits for oxidation scum, Sodium Polyacrylate, sodium acrylate and the acrylic acid of sodium
The copolymer of ammonium and the nitride dross of sodium swim in aluminium melt surface.
S5：After dross swims in aluminium melt surface, operation of skimming is carried out, by slag bucket and melting furnace door is emitted into when skimming
Mouthful, slag rake is provoked to 2m height with fork truck, is steadily entered in smelting furnace, is taken off outward from smelting furnace innermost end, dross is taken off to stove
Then dross is all grilled into slag bucket by platform, the aluminium alloy melt after obtaining except sodium, and the melt is taken to carry out sodium element detection.
Embodiment 3
S1：The ADC12 aluminium alloys that weight is one ton are put into smelting furnace and are heated, aluminium alloy when temperature is increased to 600 DEG C
Start to melt, melt is obtained after aluminium alloy is completely melt.
S2：Continue to furnace heats, fire door in opened condition, makes melt temperature in smelting furnace be increased to 725 DEG C, and control temperature
Degree is stablized, and maintains 8min, the sodium element in melt is made fully to react.Other metallic elements are compared to, sodium element is more active,
Oxidizable, in smelting furnace when melt combustion heating, sodium is contacted with the oxygen in air, oxidation scum is generated, so as to subtract
Part sodium element in few aluminium alloy.
S2’：10kg ammonium acrylates and the accelerating agent ammonium nilrite of 0.5kg are added into melt, and is sufficiently stirred melt,
The sodium element in melt is set to be come into full contact with ammonium acrylate.Under conditions of ammonium nilrite does accelerating agent, the sodium element in melt
It is reacted with ammonium acrylate and generates sodium acrylate, one-step polymerization of going forward side by side is Sodium Polyacrylate.Sodium Polyacrylate is as a kind of novel work(
Can high molecular material, cross-bond is mutually generated between molecule, forms polymer, the sodium element enabled aluminum alloy in melt is transferred
Into Sodium Polyacrylate, to reduce the part sodium element in aluminium alloy melt.And sodium acrylate has with ammonium acrylate copolymer
There is certain viscosity, form floccule in melt, and is gradually floated to melt upper surface.
S3：Continue to make melt temperature be increased to 740 DEG C furnace heats in the state of oven door opening；Later, it closes molten
Furnace door uses nitrogen injection melt 30min.Before using nitrogen injection, confirm whether nitrogen is sufficient, and whether pipeline is unimpeded,
Whether there is or not damages；And check that nitrogen gas purity is shown in 99.999, and nitrogen pressure force value confirms between 0.20-0.3Mpa.
In the environment of closed high temperature completely cuts off, the sodium element in melt reacts with nitrogen, generates sodium azide NaN3,
Under high temperature, sodium azide swims in molten aluminum surface in the form of dross, so as to the sodium member being further reduced in aluminium alloy melt
Cellulose content.
S4：So that melt in smelting furnace is stood 20min, waits for oxidation scum, Sodium Polyacrylate, sodium acrylate and the acrylic acid of sodium
The copolymer of ammonium and the nitride dross of sodium swim in aluminium melt surface.
S5：After dross swims in aluminium melt surface, operation of skimming is carried out, by slag bucket and melting furnace door is emitted into when skimming
Mouthful, slag rake is provoked to 2m height with fork truck, is steadily entered in smelting furnace, is taken off outward from smelting furnace innermost end, dross is taken off to stove
Then dross is all grilled into slag bucket by platform, the aluminium alloy melt after obtaining except sodium, and the melt is taken to carry out sodium element detection.
Comparative example 1
S1：The ADC12 aluminium alloys that weight is one ton are put into smelting furnace and are heated, aluminium alloy when temperature is increased to 600 DEG C
Start to melt, melt is obtained after aluminium alloy is completely melt.
S2：Continue to furnace heats, fire door in opened condition, makes melt temperature in smelting furnace be increased to 725 DEG C, adds thereto
Enter sodium removing agent 50kg, be uniformly mixed, the sodium in aluminum melt is handled.Sodium removing agent used purchase is from river in the present embodiment
Su Xuzhou Jie Ke Aluminums Co., Ltd, concrete model are aluminium sodium removing agent JK-LCN1050.
S3：So that melt in smelting furnace is stood 20min, dross is waited for swim in aluminium melt surface.
S4：After dross swims in aluminium melt surface, operation of skimming is carried out, by slag bucket and melting furnace door is emitted into when skimming
Mouthful, slag rake is provoked to 2m height with fork truck, is steadily entered in smelting furnace, is taken off outward from smelting furnace innermost end, dross is taken off to stove
Then dross is all grilled into slag bucket by platform, the aluminium alloy melt after obtaining except sodium, and the melt is taken to carry out sodium element detection.
Comparative example 2
S1：The ADC12 aluminium alloys that weight is one ton are put into smelting furnace and are heated, aluminium alloy when temperature is increased to 600 DEG C
Start to melt, melt is obtained after aluminium alloy is completely melt.
S2：Continue to furnace heats, fire door in opened condition, makes melt temperature in smelting furnace be increased to 720 DEG C, adds thereto
Enter sodium removing agent 80kg, be uniformly mixed, the sodium in aluminum melt is handled.Sodium removing agent used purchase is from river in the present embodiment
Su Xuzhou Jie Ke Aluminums Co., Ltd, concrete model are aluminium sodium removing agent JK-LCN1050.
S3：So that melt in smelting furnace is stood 20min, dross is waited for swim in aluminium melt surface.
S4：After dross swims in aluminium melt surface, operation of skimming is carried out, by slag bucket and melting furnace door is emitted into when skimming
Mouthful, slag rake is provoked to 2m height with fork truck, is steadily entered in smelting furnace, is taken off outward from smelting furnace innermost end, dross is taken off to stove
Then dross is all grilled into slag bucket by platform, the aluminium alloy melt after obtaining except sodium, and the melt is taken to carry out sodium element detection.
After being melt to aluminium alloy smelting in each embodiment, except before sodium (after the completion of i.e. each embodiment step S1), and remove
Sodium element content after the completion of sodium in melt is detected, specific detection method reference《Cast nonferrous alloy》(yellow extensive member writes, machine
Tool industry publishing house, 1999).As a result such as following table.
| Number | Except (ppm) before sodium | Except (ppm) after sodium |
| Embodiment 1 | 50.0 | 8.0 |
| Embodiment 2 | 49.9 | 8.8 |
| Embodiment 3 | 51.5 | 7.6 |
| Comparative example 1 | 51.8 | 17.8 |
| Comparative example 2 | 50.6 | 15.6 |
As can be seen from the above table, under five experiment conditions of embodiment 1-3 and comparative example 1-2, it is in aluminium alloy smelting
After aluminum melt, except the sodium element content in aluminium alloy melt before sodium is in 50ppm or so, and embodiment 1-3 is using the present invention
Except the method for sodium is carried out except after sodium, the content of sodium element drops to 8ppm or so so that the content of sodium element is big in aluminum melt
It is big to reduce.But comparative example 1 and comparative example 2 remove sodium using sodium removing agent, after single removes sodium, the content of sodium element is big in aluminum melt
Generally between 15-18ppm, content is still higher, and the influence of the sodium element content to aluminium alloy compression casting is still larger, finally
The quality of product aluminium alloy ingots is set to be badly damaged.
Claims (6)
1. a kind of aluminum melt removing sodium, which is characterized in that include the following steps：
S1：Alloy is added in smelting furnace, heating is smelted into melt；
S2：Temperature of smelting furnace is risen to 710-725 DEG C, control temperature is stablized, and sodium element oxidation is made to generate oxidation scum；
S3：Continue to heat, increases temperature to 725-740 DEG C, close smelting furnace fire door, use nitrogen injection melt；
S4：Melt is stood；
S5：It skims, the aluminium alloy melt after obtaining except sodium.
2. a kind of aluminum melt removing sodium according to claim 1, it is characterised in that：Controlled at 720 DEG C in S2, and
Maintain 10min.
3. a kind of aluminum melt removing sodium according to claim 1, it is characterised in that：Temperature is increased in S3 to 730 DEG C.
4. a kind of aluminum melt removing sodium according to claim 1, it is characterised in that：The nitrogen injection time is in S3
30min。
5. a kind of aluminum melt removing sodium according to claim 1, it is characterised in that：Increase S2 ' between S2 and S3：To
Ammonium acrylate and accelerating agent, stirring are added in melt.
6. a kind of aluminum melt removing sodium according to claim 5, it is characterised in that：The accelerating agent is ammonium nilrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810465214.4A CN108342603A (en) | 2018-05-16 | 2018-05-16 | A kind of aluminum melt removing sodium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810465214.4A CN108342603A (en) | 2018-05-16 | 2018-05-16 | A kind of aluminum melt removing sodium |
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| CN108342603A true CN108342603A (en) | 2018-07-31 |
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ID=62956266
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106377A (en) * | 2019-06-11 | 2019-08-09 | 天津圣金特汽车配件有限公司 | A kind of automobile engine bracket aluminum melting process |
| CN113373319A (en) * | 2021-04-22 | 2021-09-10 | 福建麦特新铝业科技有限公司 | Method for removing alkali metal from aluminum and aluminum melt in green manner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168287A (en) * | 2011-03-23 | 2011-08-31 | 四川鑫星铝业有限责任公司 | Sodium removing agent for aluminum alloy |
| CN103898381A (en) * | 2014-03-26 | 2014-07-02 | 安徽家园铝业有限公司 | High-strength aluminum alloy profile and preparation method thereof |
-
2018
- 2018-05-16 CN CN201810465214.4A patent/CN108342603A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168287A (en) * | 2011-03-23 | 2011-08-31 | 四川鑫星铝业有限责任公司 | Sodium removing agent for aluminum alloy |
| CN103898381A (en) * | 2014-03-26 | 2014-07-02 | 安徽家园铝业有限公司 | High-strength aluminum alloy profile and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106377A (en) * | 2019-06-11 | 2019-08-09 | 天津圣金特汽车配件有限公司 | A kind of automobile engine bracket aluminum melting process |
| CN113373319A (en) * | 2021-04-22 | 2021-09-10 | 福建麦特新铝业科技有限公司 | Method for removing alkali metal from aluminum and aluminum melt in green manner |
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