CN103555976A - Aluminum bar smelting and casting process - Google Patents
Aluminum bar smelting and casting process Download PDFInfo
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- CN103555976A CN103555976A CN201310538784.9A CN201310538784A CN103555976A CN 103555976 A CN103555976 A CN 103555976A CN 201310538784 A CN201310538784 A CN 201310538784A CN 103555976 A CN103555976 A CN 103555976A
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Abstract
The invention discloses an aluminum bar smelting and casting process which comprises the following steps: S1, preparing aluminum ingots and auxiliary materials, and sequentially adding into a smelting furnace; S2, smelting the aluminum ingots and the auxiliary materials at 900-970 DEG C to obtain an aluminum solution, wherein the temperature of the aluminum solution is 700-760 DEG C; S3, after the aluminum ingots are sufficiently molten, stirring, and removing slag; S4, putting a refining agent into a blow gun, and refining while blowing in the refining agent with nitrogen gas, wherein the temperature of the aluminum solution after refining is 730-760 DEG C; S5, casting at 710-730 DEG C to obtain cast bars; and S6, inspecting the cast bars, sawing, and warehousing. According to the invention, the aluminum bar smelting and casting process improves the aluminum alloy smelting and casting quality, and ensures the product quality and production efficiency.
Description
Technical field
The present invention relates to aluminium bar casting technology field, relate in particular to a kind of aluminium bar founding.
Background technology
Over nearly 20 years, along with the high speed development of building trade, China's covil construction aluminium section bar industry is also grown out of nothing, and rapidly advances from weak to strong.So far, the architectural aluminum section product in Guangdong Province has accounted for 2/3rds left and right in the whole nation, and the throughput of aluminium section bar surpasses social demand, how to improve the quality of products, and reducing costs is the key link that obtains market competition triumph.
Aluminium bar founding comprises fusing, purification, removal of impurities, degasification, slagging-off and castingprocesses.Main process is:
Batching: the concrete alloy designations of producing as required, calculates the addition of various alloying constituents, reasonably combined various starting material.
Melting: the starting material that prepare are added in smelting furnace and melted by processing requirement, and by degasification, deslagging refining means, assorted slag, gas in melt are effectively removed.
Casting: melted aluminium liquid is under certain casting technique condition, and by deep-well casting system, cooling casting becomes the round casting rod of all size.
Yet aluminium alloy smelting in prior art, castability are lower, and quality product and production efficiency can not be guaranteed.
Summary of the invention
The technical problem to be solved in the present invention is also to provide a kind of aluminium bar founding.
The technical solution adopted for the present invention to solve the technical problems is: a kind of aluminium bar founding, and described technique comprises the following steps:
S1, preparation aluminium ingot and subsidiary material, and add successively in smelting furnace;
S2, at 900 ℃～970 ℃ temperature, aluminium ingot and subsidiary material are carried out to melting, obtain aluminum melt, described aluminum melt temperature is between 700 ℃～760 ℃;
S3, aluminium ingot stir after fully melting and skim;
S4, refining agent is put into powder sprayer by nitrogen, be blown into and carried out refining, after refining, aluminum solutions temperature is between 730 ℃～760 ℃;
S5, at 710 ℃～730 ℃ temperature, cast, obtain casting rod;
S6, casting rod is tested, and sawing, warehouse-in.
As a further improvement on the present invention, the subsidiary material in described step S1 comprise titanium boron refinement silk, Pure Silicon Metal, remelting magnesium ingot, zinc ingot metal, manganese ingot, chromium metal.
As a further improvement on the present invention, in described step S1, add the material of smelting furnace also comprise extruding tailing and thin material rebasing.
As a further improvement on the present invention, in described step S1, add the order of smelting furnace to be followed successively by extruding tailing and thin material is rebasing, aluminium ingot, subsidiary material.
As a further improvement on the present invention, in described step S2, every heat is done more than 2 times furnace bottom stirring in melting process, in order to fluxing.
As a further improvement on the present invention, before described step S4, also comprise:
Melt is sampling immediately after fully stirring, and carries out on-the-spot sample analysis, according to analytical results, determines feed supplement amount.
As a further improvement on the present invention, described sample position is at the melt degree of depth 1/2nd places at smelting furnace center, and probe temperature is more than or equal to 730 ℃.
As a further improvement on the present invention, after described step S4, also comprise:
Adjust composition, according to analytical results, carry out feed supplement, and fully stir and skim.
As a further improvement on the present invention, the casting speed in described step S4 is 80～180mm/min.
As a further improvement on the present invention, before described step S1, also comprise smelting furnace is dried and preheating.
The invention has the beneficial effects as follows, aluminium bar founding of the present invention has improved aluminium alloy smelting, castability, guarantees quality product and production efficiency.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the particular flow sheet of aluminium bar founding of the present invention.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention is only described in a schematic way, so it only show the formation relevant with the present invention.
A founding, shown in ginseng Fig. 1, this technique comprises the following steps:
S1, preparation aluminium ingot and subsidiary material, and add in smelting furnace successively.Subsidiary material comprise titanium boron refinement silk, Pure Silicon Metal, remelting magnesium ingot, zinc ingot metal, manganese ingot, chromium metal;
S2, at 900 ℃～970 ℃ temperature, aluminium ingot and subsidiary material are carried out to melting, obtain aluminum melt, described aluminum melt temperature is between 700 ℃～760 ℃.Every heat is made more than 2 times furnace bottom and is stirred in melting process, in order to fluxing;
S3, aluminium ingot stir after fully melting and skim;
S4, refining agent is put into powder sprayer by nitrogen, be blown into and carried out refining, after refining, aluminum solutions temperature is between 730 ℃～760 ℃.Casting speed is 80～180mm/min;
S5, at 710 ℃～730 ℃ temperature, cast, obtain casting rod;
S6, casting rod is tested, and sawing, warehouse-in.
Further, in step S1, add the material of smelting furnace also comprise extruding tailing and thin material rebasing.Add the order of smelting furnace to be followed successively by extruding tailing and thin material is rebasing, aluminium ingot, subsidiary material.
Before step S4, also comprise:
Melt is sampling immediately after fully stirring, and carries out on-the-spot sample analysis, according to analytical results, determines feed supplement amount.Sample position is at the melt degree of depth 1/2nd places at smelting furnace center, and probe temperature is more than or equal to 730 ℃.
After step S4, also comprise:
Adjust composition, according to analytical results, carry out feed supplement, and fully stir and skim.
Wherein, before step S1, also comprise smelting furnace is dried and preheating.
Aluminium bar founding in the embodiment of the invention comprises the following steps: melting preparation-shove charge-melting-stirring skim-sampling analysis-refining-adjusting component-sampling analysis-casting-check, sawing, warehouse-in.
melting is prepared
Aluminium ingot is pressed GB3119 standard and is checked and accepted:
Range estimation: aluminium ingot must be stacked neatly after entering factory, and surface should be clean and tidy, without serious pore;
When outside surface obviously adds slag, do the sight of end face saw cutting test and look into, add the top of the slag long-pending≤0.20%;
Random chemical examination, sample size 30t/1, what surpass extracts by multiple, not enough in 1 extraction.The material certificate that standard for acceptance provides according to supplier, permissible error: single composition meter 3% value.
Subsidiary material:
The refining agent (slagging agent) that melting/casting is used, titanium boron refinement silk, Pure Silicon Metal, remelting magnesium ingot, zinc ingot metal, manganese ingot, chromium metal etc.;
Remelting class ingot, when again processing remelting, calculates/analyzes individual event metal content, then to use the alloy content accuracy rate to finished product, draw the exactness of subsidiary material.
shove charge
Furnace charge must be totally anhydrous, must not sneak into other metals and foreign material.Feeding sequence is: extruding tailing/thin material is rebasing, rear aluminium ingot, the multiple ingot of remelting.
Dry and the preheating of body of heater, is a requisite procedure before founding is produced, and its object is got rid of burner hearth, siege, body of heater moisture, and fire resisting material of furnace body is slowly expanded, and avoids too urgent heat expansion, has the danger of bursting apart.Particularly the stove of new stove and process overhaul or long-term blowing out, more will carry out baker.During baking, strain in time pull rod stud, running check, as found the situations such as furnace wall cracking and spalling, must blowing out reparation.
melting
Fusion process and speed of melting are to determine the most important ring of ingot quality.Fusion process must have enough temperature, guarantees that metal and alloying element fully melt, and aluminum melt temperature is the highest must not be over 760 ℃, in fusion process, should note melt overheat, overheated meeting increases tolerance, and ingot structure is loose, coarse grains, and increase the hot cracking tendency of ingot casting.Smelting time is long, can make aluminium air content increase, and reduces hot extrusion throughput.
When furnace charge melts approximately 90% left and right, allow to stir, during stirring, require steadily, to forbid surface scum to be involved in melt metal.Every heat is made more than 2 times furnace bottom and is stirred in melting process, in order to fluxing, shortens fusing time, prevents the local area burning of aluminium water.
stirring is skimmed
After metal fully melts in molten bath, just should stir in time, the object of stirring is to make metal ingredient to be uniformly distributed.Stirring can also promote the even conduction of heat of liquid, when furnace charge does not fully melt, also can agitation as appropriate contribute to accelerate fusing, and the process of stirring can be skimmed simultaneously.
sampling analysis
Melt, after fully stirring, should sample immediately, carries out on-the-spot sample analysis, according to analytical results, determines feed supplement amount.Probe temperature must not be lower than 730 ℃, the melt degree of depth 1/2nd places at Lu center, sample position.
refining
The object of refining is to control Chemical Composition, improves the clarity of melt, and method is to use nitrogen and refining agent to combine.The object of gas refinement method is to get rid of the gas that aluminium alloy absorbs when smelting, and flux-refining method is to get rid of the lime-ash being mixed with physical condition in molten aluminium alloy in fusion process.
Refining temperature is: 730 ℃-760 ℃.
Often after molten initial refining, the residence time must not surpass at 2 o'clock for some reason, otherwise refining again.
Every stove ash discharge is no less than twice, and ash discharge, must put into powder sprayer by refining agent (slagging agent) etc. and be blown into by nitrogen for the second time.
Concise opportunity:
1. stokehold sampling;
2. material supplements rear (silicon, magnesium, tailing);
3. standing front concise merely.
4., after all material supplements, fully stir.
After refining, must thoroughly skim, refining is complete should keep temperature of aluminum liquid: 730 ℃-760 ℃;
Standing 10-20 minute; During aluminium ingot≤60%, time of repose is at 20-30 minute.
adjusting component
According to stokehold assay result, carry out feed supplement calculating, feed supplement principle is to guarantee that component proportions and impurity element composition are in internal control standard allowed band.After feed supplement, to fully stir, and skim; Supplement starting material when 300kg is above, require refining treatment.
sampling analysis
After adjusting component, again carry out sampling analysis, determine whether feed supplement again.
casting
Casting technique and operation:
Casting technological parameter table is as follows:
Before casting, all preparation works are carried out, water outlet will be prepared plural chock plug.
All casting tools: chute, muff etc. must coat coating, have not allowed grinning effect, and want smooth smooth.
The coolant water temperature of casting G rod should remain on 35-50 ℃.
During casting, first open the mouth of a river, when aluminium liquid is full of 70-80%, open immediately cooling-water pump, and open casting machine.In castingprocesses, to pay close attention to casting case and change, keep the stable of aluminium water liquid.
sawing, warehouse-in
Be no more than ± the 2mm of part such as casting rod must be carried out surface quality testing, comprises bending, crackle, slag inclusion, cold shut drawing crack, and it is concavo-convex.After satisfying condition, according to scheduling list, carry out sawing, cut gradient≤3 °, the casting rod through being up to the standards, stamps heat (batch) number in accordance with regulations, just allows warehouse-in and uses.
By above-mentioned embodiment, can be found out, aluminium bar founding of the present invention has improved aluminium alloy smelting, castability, guarantees quality product and production efficiency.
The above-mentioned foundation desirable embodiment of the present invention of take is enlightenment, and by above-mentioned description, relevant staff can, within not departing from the scope of this invention technological thought, carry out various change and modification completely.The technical scope of this invention is not limited to the content on specification sheets, must determine its technical scope according to claim scope.
Claims (10)
1. an aluminium bar founding, is characterized in that, described technique comprises the following steps:
S1, preparation aluminium ingot and subsidiary material, and add successively in smelting furnace;
S2, at 900 ℃～970 ℃ temperature, aluminium ingot and subsidiary material are carried out to melting, obtain aluminum melt, described aluminum melt temperature is between 700 ℃～760 ℃;
S3, aluminium ingot stir after fully melting and skim;
S4, refining agent is put into powder sprayer by nitrogen, be blown into and carried out refining, after refining, aluminum solutions temperature is between 730 ℃～760 ℃;
S5, at 710 ℃～730 ℃ temperature, cast, obtain casting rod;
S6, casting rod is tested, and sawing, warehouse-in.
2. aluminium bar founding according to claim 1, is characterized in that, the subsidiary material in described step S1 comprise titanium boron refinement silk, Pure Silicon Metal, remelting magnesium ingot, zinc ingot metal, manganese ingot, chromium metal.
3. aluminium bar founding according to claim 1, is characterized in that, in described step S1, add the material of smelting furnace also comprise extruding tailing and thin material rebasing.
4. aluminium bar founding according to claim 3, is characterized in that, adds the order of smelting furnace to be followed successively by extruding tailing and thin material is rebasing, aluminium ingot, subsidiary material in described step S1.
5. aluminium bar founding according to claim 1, is characterized in that, in described step S2, every heat is done more than 2 times furnace bottom stirring in melting process, in order to fluxing.
6. aluminium bar founding according to claim 1, is characterized in that, before described step S4, also comprises:
Melt is sampling immediately after fully stirring, and carries out on-the-spot sample analysis, according to analytical results, determines feed supplement amount.
7. aluminium bar founding according to claim 6, is characterized in that, described sample position is at the melt degree of depth 1/2nd places at smelting furnace center, and probe temperature is more than or equal to 730 ℃.
8. aluminium bar founding according to claim 6, is characterized in that, after described step S4, also comprises:
Adjust composition, according to analytical results, carry out feed supplement, and fully stir and skim.
9. aluminium bar founding according to claim 1, is characterized in that, the casting speed in described step S4 is 80～180mm/min.
10. aluminium bar founding according to claim 1, is characterized in that, before described step S1, also comprises smelting furnace is dried and preheating.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372189A (en) * | 2014-12-08 | 2015-02-25 | 湖北万佳宏铝业有限公司 | Fusion casting process used for producing aluminium ingots for aluminium alloy sections |
| CN106282694A (en) * | 2016-09-20 | 2017-01-04 | 池州市安安精工铝业有限公司 | A kind of high-strength abrasion-proof aluminium alloy extrusions and preparation method thereof |
| CN108048670A (en) * | 2018-01-31 | 2018-05-18 | 福建奋安铝业有限公司 | A kind of smelting equipment of the founding aluminium bar of aluminium profiles timber-used |
| CN108048669A (en) * | 2017-12-25 | 2018-05-18 | 福建奋安铝业有限公司 | A kind of smelting technology of the founding aluminium bar of aluminium profiles timber-used |
| CN112226628A (en) * | 2020-09-30 | 2021-01-15 | 张家港润金金属材料有限公司 | Smelting process of aluminum bar |
| CN113418399A (en) * | 2021-04-29 | 2021-09-21 | 广元市林丰铝电有限公司 | Environment-friendly and clean aluminum profile production line |
| CN114367784A (en) * | 2021-12-01 | 2022-04-19 | 江苏伟业铝材有限公司 | Casting process of aluminum profile |
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| JPH02211938A (en) * | 1988-12-22 | 1990-08-23 | Schweiz Alum Ag <Alusuisse> | Method and apparatus for electromagnetic casting of metal |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372189A (en) * | 2014-12-08 | 2015-02-25 | 湖北万佳宏铝业有限公司 | Fusion casting process used for producing aluminium ingots for aluminium alloy sections |
| CN106282694A (en) * | 2016-09-20 | 2017-01-04 | 池州市安安精工铝业有限公司 | A kind of high-strength abrasion-proof aluminium alloy extrusions and preparation method thereof |
| CN108048669A (en) * | 2017-12-25 | 2018-05-18 | 福建奋安铝业有限公司 | A kind of smelting technology of the founding aluminium bar of aluminium profiles timber-used |
| CN108048669B (en) * | 2017-12-25 | 2019-06-25 | 福建奋安铝业有限公司 | A kind of smelting technology of the founding aluminium bar of aluminum profile |
| CN108048670A (en) * | 2018-01-31 | 2018-05-18 | 福建奋安铝业有限公司 | A kind of smelting equipment of the founding aluminium bar of aluminium profiles timber-used |
| CN108048670B (en) * | 2018-01-31 | 2019-06-28 | 福建奋安铝业有限公司 | A kind of smelting equipment of the founding aluminium bar of aluminum profile |
| CN112226628A (en) * | 2020-09-30 | 2021-01-15 | 张家港润金金属材料有限公司 | Smelting process of aluminum bar |
| CN113418399A (en) * | 2021-04-29 | 2021-09-21 | 广元市林丰铝电有限公司 | Environment-friendly and clean aluminum profile production line |
| CN113418399B (en) * | 2021-04-29 | 2023-01-31 | 广元市林丰铝电有限公司 | Environment-friendly and clean aluminum profile production line |
| CN114367784A (en) * | 2021-12-01 | 2022-04-19 | 江苏伟业铝材有限公司 | Casting process of aluminum profile |
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Application publication date: 20140205 |