CN104357722B - A kind of solar energy collecting accumulation of heat aluminium foil and manufacture method thereof - Google Patents

A kind of solar energy collecting accumulation of heat aluminium foil and manufacture method thereof Download PDF

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Publication number
CN104357722B
CN104357722B CN201410549317.0A CN201410549317A CN104357722B CN 104357722 B CN104357722 B CN 104357722B CN 201410549317 A CN201410549317 A CN 201410549317A CN 104357722 B CN104357722 B CN 104357722B
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aluminium foil
rolled
thick
cold
paper tinsel
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CN104357722A (en
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吴丹
黄善球
刘军民
王民生
任志峰
李跃初
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Jiangyin Xinren Aluminum Foil Technology Co ltd
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Jiangyin Xinren Technology Co Ltd
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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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc
    • 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
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S70/00—Details of absorbing elements
    • F24S70/10—Details of absorbing elements characterised by the absorbing material
    • F24S70/12—Details of absorbing elements characterised by the absorbing material made of metallic material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

Abstract

The present invention relates to a kind of solar energy collecting accumulation of heat aluminium foil and manufacture method thereof, its chemical composition is by mass percentage: Si:0.01～0.07%, Fe:0.01～0.12%, Cu:0.08～0.12%, Mn :≤0.005%, Zn :≤0.005%, Mg :≤0.005%, Ti:0.01～0.03%, surplus is Al and inevitable impurity.The thickness of aluminium foil is 0.044 ± 0.001mm, and tensile strength is 250～280MPa, yield strength 235～265MPa, elongation percentage >=1%, thermal conductivity >=225W/ (m K) when 25 DEG C.By rationally arranging copper and the content of other alloying elements in aluminium foil, make aluminium foil form the black oxidation copper film layer of surface strong coloring force when carrying out surface chemistry corrosion treatmentCorrosion Science, thus realize the aluminium foil raising to solar absorptance and the reduction of reflection coefficient.

Description

A kind of solar energy collecting accumulation of heat aluminium foil and manufacture method thereof
Technical field
The invention belongs to aluminium foil and method field of manufacturing thereof, be specifically related to that a kind of chemically blackening colorability is strong and mechanical property The aluminium foil moulded and manufacture method thereof can be processed by excellent being easy to.
Background technology
At present, plate solar collector heat-absorbing plate core structure predominantly plane aluminium foil adds heat absorbing coating, and it relies on increase Aluminium foil specific surface area improves the adhesive force between aluminium foil and heat absorbing coating, heat absorbing coating reach purpose of absorbing heat.This clad aluminum foil Manufacturing condition requires harshness, and lumber recovery is relatively low, and heat absorbing coating is expensive, thus is difficult to popularization and application.From improving too The endothermic effect of sun collection energy heat-absorbing plate core and heat storage capacity and reduction cost set out, and those skilled in the art are in terms of following two Make improvement: transform plate solar collector heat-absorbing plate core slab construction as flat laminated aluminium foil honeycomb body structure, Accumulation of heat effect is made to be obviously improved；Meanwhile, aluminium foil surface carries out chemically blackening process makes aluminium foil surface formation one layer black Color film layer, this black film layer has high solar far-infrared absorption rate and low reflection coefficient, has obvious endothermic effect, thus The heat absorbing coating that alternative cost is higher.
The series of processes such as above-mentioned aluminium foil honeycomb body structure is cut by aluminium foil, overlap, stretching are fabricated by, and this is right The mechanical property of used aluminium foil has certain requirement, as strong in required that aluminium foil self has high surrender for adaptation machine-shaping Degree, tensile strength and yield tensile ratio etc..Meanwhile, in order to ensure heat absorption, the heat storage capacity of aluminium foil, require aluminium foil self not only but also have excellent Good heat-resisting, heat conductivity and stronger chemically blackening colorability.In order to meet aforementioned terms and conditions, to existing aluminium foil alloy It is that those skilled in the art are in the urgent need to the technical problem probed into that composition and content and its processing technique are further improved.
Summary of the invention
The technical problem to be solved is to provide a kind of aluminium foil for above-mentioned prior art, and its chemically blackening colours Ability is strong, heat-resisting, heat conductivility is excellent and excellent in mechanical performance, it is possible to the flat being suitable to manufacture solar energy collecting heat-absorbing plate core is many Layer aluminium foil honeycomb ceramics.
Another technical problem to be solved by this invention is to provide the manufacture method of a kind of above-mentioned aluminium foil.
The present invention solves the technical scheme that the problems referred to above are used, a kind of solar energy collecting accumulation of heat aluminium foil, this aluminium foil Chemical composition is by mass percentage: Si:0.01～0.07%, Fe:0.01～0.12%, Cu:0.08～0.12%, Mn :≤ 0.005%, Zn :≤0.005%, Mg :≤0.005%, Ti:0.01～0.03%, surplus is Al and inevitable impurity.
Further, the thickness of described aluminium foil is 0.044 ± 0.001mm, and tensile strength is 250～280MPa, and surrender is strong Degree 235～265MPa, elongation percentage >=1%, thermal conductivity >=225W/ (m K) when 25 DEG C.
Under room temperature, Mg dissolubility in aluminum is less than 2%, and the Mg of low content is substantially all and is solid-solubilized in aluminum substrate, aluminum substrate Electrode potential be barely affected.The MnAl that Mn is formed in aluminum6Equal with the electrode potential of fine aluminium.The membership that adds of Zn makes aluminum The current potential of matrix is raised.Cu is the element making the current potential of aluminum substrate decline.Low easily the sending out for negative pole of current potential in galvanic interaction Raw oxidation reaction, is conducive to aluminium foil to process the CuO of rear surface formation black through chemical attack by increasing the content of Cu in aluminium foil Film layer, improves the corrosion resistance of aluminium foil as the protective layer of aluminium foil surface, meets as solar energy collecting accumulation of heat aluminium foil simultaneously The technology that chemically blackening colorability is strong uses requirement, and the oxidized black CuO film layer obtained has higher solar energy Far-infrared absorption rate and low reflection coefficient, contribute to significantly improving the heat absorption of aluminium foil, accumulation of heat effect.
The installation warrants of Cu content of the present invention is, under room temperature, Cu dissolubility in aluminum is about 0.1%, in chemical attack In process, Cu too high levels aluminium foil surface oxidation reaction is violent, and the heat of release is big, and aluminium foil surface easily forms corrosion failure, The too low oxidation filming thickness that can affect again aluminium foil surface of Cu content, therefore, in the present invention proportioning of Cu content be 0.08～ 0.12%, under the conditions of being somebody's turn to do, the chemically blackening treatment effect of aluminium foil is optimal.It addition, increase Cu content in right amount have certain solution strengthening Effect, it is possible to increase the elevated temperature strength of aluminium alloy, makes aluminium foil have excellent thermostability；FeAl in aluminium foil3Can dissolve a small amount of Cu, generate (FeCu) Al6Compound, thermal conductivity can have increased slightly with the rising of temperature, makes up because plastic deformation makes the heat of aluminum The loss that conductance declines, beneficially aluminium foil alloy keep the superior thermal conductivity that fine aluminium is intrinsic.
Ti is addition element conventional in aluminium alloy, with AlTi5B filamentous form adds Al melt, forms Al3Ti and B2Ti Phase compound, becomes non-spontaneous nucleation during crystallization, plays the effect of refinement Microstructure of roll casting, the beneficially raising of alloy plasticity.
The electrode potential of the trace compound that the trace element such as Fe, Si, Mn, Zn, Mg are formed in aluminium foil is than aluminum base Height wanted by body electrode potential, and at aluminium foil surface after chemical attack processes, spot corrosion is preferentially at black oxide film surface defect and trace Position that element compound combines occurs, and therefore the content of the trace element such as Fe, Si, Mn, Zn, Mg in aluminium foil must be strict Control, to improve the surface quality of black oxidation copper film, it is ensured that the heat absorption of black oxidation copper film, heat storage capacity.
The present invention solves the technical scheme of another technical problem, it is provided that the above-mentioned solar energy collecting accumulation of heat aluminium foil of a kind of manufacture Method, specifically comprise the following steps that
(1) strand: the raw material good by proportioning, except Ti raw material, heating is smelted into aluminium alloy melt, then casting, and In casting operation, the speed with 330～400mm/min adds AlTi in melt5B B alloy wire, casting goes out 6.5 ± 0.2mm thickness Cast-rolling stock；
(2) cold rolling: to use multi-pass cold rolling process that the cast-rolling stock that 6.5 ± 0.2mm is thick is rolled into 0.32～0.38mm Thick cold-reduced sheet；
(3) paper tinsel rolls: using multi-pass paper tinsel roll operation the cold-reduced sheet that 0.32～0.38mm is thick to be rolled into thickness is 0.044 The aluminium foil that ± 0.001mm is thick, obtains aluminum foil finished product.
Preferably, using double-stage filtering case to carry out melt filtration described in step (1) in casting operation, screen plate number is Upper strata 40ppi, lower floor 60 ppi, to guarantee the degree of purity of cast-rolling stock.
More reasonably, described multi-pass cold rolling process is specifically, by cast-rolling stock thick for 6.5 ± 0.2mm by first Secondary cold rolling process is rolled into 3.2～3.6mm thick cold-reduced sheets, then is rolled into 1.6～1.9mm thickness by the second passage cold rolling process Cold-reduced sheet, then it is rolled into 0.9～1.1mm thick cold-reduced sheet by the 3rd passage cold rolling process, then rolled by four-pass cold rolling process Make 0.55～0.65mm thick cold-reduced sheet, after parking 24～48 hours, then by the 5th passage cold rolling process be rolled into 0.32～ The cold-reduced sheet that 0.38mm is thick, parks 24～48 hours the most again.
More reasonably, described multi-pass paper tinsel rolls operation specifically, by 0.32～0.38mm thick cold-reduced sheet by first Secondary paper tinsel rolls operation and is rolled into 0.18～0.21mm thick aluminium foil, then being rolled operation by the second passage paper tinsel, to be rolled into 0.1～0.12mm thick Aluminium foil, after parking 24～48 hours, then rolled operation by the 3rd passage paper tinsel and be rolled into 0.062～0.068mm thick aluminium foil, then stop Put 24～48 hours, finally rolled operation by four-pass paper tinsel and be rolled into the thick aluminium foil of 0.044 ± 0.001mm.
The multi-pass knobble mode that this manufacture method uses, it is intended that along with rolling total deformation Being gradually increased, crystal grain and second phase particles size reduce, and dislocation density increases；Meanwhile, the deformation heat of each passes is utilized to make Rolling curling material volume heats up uniformly, promotes second phase particles to separate out and increases, and disperse is compared in distribution, and beneficially aluminium foil is through chemical attack After process, the oxidation film layer thickness uniformity that aluminium foil surface is formed.
The processing mode without intermediate annealing Direct Rolling to finished product thickness that this manufacture method uses, it is possible to significantly improve The cutting, overlap and draw in the net of the yield tensile ratio of the yield strength of aluminium foil, tensile strength, elongation percentage and aluminium foil, beneficially postorder aluminium foil Molding, it is thus achieved that structural strength higher aluminium foil honeycomb body structure.Further, since eliminate annealing steps, technique is simpler, fall The processing cost that low aluminium foil produces.
Compared with prior art, it is an advantage of the current invention that: by rationally arranging the content of copper in aluminium foil, make aluminium foil The black oxidation copper film layer of surface strong coloring force is formed, it is achieved thereby that aluminium foil is to the sun when carrying out surface chemistry corrosion treatmentCorrosion Science The raising of energy far-infrared absorption rate and the reduction of reflection coefficient.Meanwhile, the composition of other alloying elements in strict control aluminium foil The surface quality making again the black oxidation copper film layer of formation with content is more excellent, and makes the overall mechanical property of aluminium foil, resistance to Erosion performance and heat-resisting, heat conductivility are obtained for guarantee, are allowed to meet the index request as solar energy collecting accumulation of heat aluminium foil.This Outward, the corresponding manufacturing process of this aluminium foil also has advantage reasonable in design, that flow process is simple, with low cost.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
A kind of solar energy collecting accumulation of heat aluminium foil, its thickness is 0.044mm, and the chemical composition of this aluminium foil is by mass percentage For: Fe:0. 08%, Si:0.02%, Cu:0.1%, Mn :≤0.005%, Mg :≤0.005%, Zn :≤0.005%, Ti:0.03%, Surplus is Al and inevitable impurity.
The manufacturing technology steps of above-mentioned solar energy collecting accumulation of heat aluminium foil is as follows:
The first step, dispensing: according to chemical composition proportioning configuration raw material, wherein Ti is with AlTi5The form configuration of B B alloy wire；
Second step, melting: the raw material that will have configured, AlTi5Except B B alloy wire, join melting in smelting furnace, smelter Sequence includes:
A, intensification fusing: setting fire box temperature is 950～1000 DEG C, adjusts flame size and starts to warm up, and changes after putting down Stirring, thermometric in time, controls melt temperature less than 750 DEG C；
B, stirring are skimmed: in furnace charge temperature-rise period, according to load melting situation, can take the circumstances into consideration to be bulldozed or stir, carry High burn-off rate, skims after stirring；
C, input metallic addition: after furnace chargeization is flat, aluminum melt temperature reaches to want on desired additives operation instructions After the temperature asked, uniformly it is thrown into metallic addition, when temperature of aluminum liquid rises to 720～750 DEG C, stirs 4～5 minutes, promote stove Interior composition is uniform；
D, sampling: after being sprinkled into metallic addition, take after the time of repose that additive operation instructions to be achieved require Sample, melt temperature during sampling is 720～750 DEG C, thoroughly to stir melt before sampling, to ensure that composition is uniform；
E, injection refining are skimmed: injection refining initial temperature 730～750 DEG C, and refining process controls aluminum melt temperature 720 ～750 DEG C, time-consuming 15～20 minutes of refine, refining agent aluminum melt per ton uses 1.7～2.2kg, stands 15min after refine Above, skim；
F, composition adjustment: when analysis result substandard chemical composition lower limit is accomplished by feed supplement, when analysis result is higher than Need during the chemical composition upper limit of standard to water down, be stirred again after composition adjustment, composition sampling；
g、CCl4Refine is skimmed: CCl4Refine initial temperature 730～750 DEG C, refining process controls aluminum melt temperature 720 ～750 DEG C, CCl in smelting furnace4Refining time: 15～20 minutes, stands more than 15min, skims after refine；
H, secondary component adjust: composition adjustment scope, more than 0.03%, needs to carry out CCl4Refine, resampling confirms.
I, lead stokehold sampling: composition adjustment, stir and temperature reach requirement after be sampled again, determine and lead stokehold Alloying component controls in preset range.
J, smelting furnace prepurging: lead furnace rear and carry out scraping end operation, it is ensured that the raw capacity of smelting furnace, enter molten after blowing out cooling Prepurging in furnace；
K, holding furnace process: carry out CCl in leading furnace rear 10min4Refine, refining time 15～20 minutes, sampling confirms into Dividing and meet the requirements, melt is parked more than 4 hours needs to carry out argon refine, and argon refining cycle is 3～5 hours, and each refine is complete Complete need are skimmed；
3rd step, casting: using double roller continuous casting casting and rolling installation that aluminum melt carries out continuous casting and rolling, direct casting goes out to be suitable to cold 6.5 ± the 0.2mm, the width that roll are the cast-rolled block of 1090 ± 10mm, start the line matched with degasification tank in casting operation Material batcher, adds the AlTi for the refinement of online crystal grain in melt5B B alloy wire, delivery rate is 330～400mm/min, Meanwhile, starting melt filtration in casting operation, use double-stage filtering case to carry out melt filtration, screen plate mesh number is: upper strata 40ppi, lower floor 60ppi；
4th step, cold rolling: cast-rolling stock thick for 6.5mm is rolled into the cold rolling of 3.4mm thickness by the first passage cold rolling process Plate, then it is rolled into the thick cold-reduced sheet of 1.8mm by the second passage cold rolling process, then it is rolled into 1.0mm by the 3rd passage cold rolling process Thick cold-reduced sheet, then it is rolled into the thick cold-reduced sheet of 0.63mm by four-pass cold rolling process, after parking 24 hours, then by the 5th road Secondary cold rolling process is rolled into the cold-reduced sheet that 0.35mm is thick, parks 24 hours the most again；
5th step, paper tinsel rolls: by the first passage paper tinsel, cold-reduced sheet thick for 0.35mm is rolled operation and is rolled into the thick aluminum of 0.195mm Paper tinsel, then rolled operation by the second passage paper tinsel and be rolled into the thick aluminium foil of 0.11mm, after parking 24 hours, then rolled operation by the 3rd passage paper tinsel It is rolled into the thick aluminium foil of 0.065mm, then parks 24 hours, finally rolled operation by four-pass paper tinsel and be rolled into the thick aluminum of 0.044mm Paper tinsel finished product.
In the present embodiment, made aluminium foil performance after testing meets: ratio electric capacity >=520 μ f, grain size≤1 grade, tensile strength 280MPa, yield strength 260MPa, elongation percentage >=1%, when 25 DEG C, thermal conductivity is 230W/(m.k).After chemically blackening processes, aluminum Paper tinsel surface oxidation film colorability is strong, thickness is homogeneous, excellent surface quality, meets the skill as solar energy collecting accumulation of heat aluminium foil Art index request.
Embodiment 2
A kind of solar energy collecting accumulation of heat aluminium foil, its thickness is 0.043mm, and the chemical composition of this aluminium foil is by mass percentage For: Fe:0. 02%, Si:0.05%, Cu:0.12%, Mn :≤0.005%, Mg :≤0.005%, Zn :≤0.005%, Ti:0.02%, Surplus is Al and inevitable impurity.
Manufacturing process being distinguished as on the basis of embodiment 1 of above-mentioned solar energy collecting accumulation of heat aluminium foil:
4th step, cold rolling: cast-rolling stock thick for 6.5 ± 0.2mm is rolled into 3.2mm thickness by the first passage cold rolling process Cold-reduced sheet, then it is rolled into the thick cold-reduced sheet of 1.6mm by the second passage cold rolling process, then be rolled into by the 3rd passage cold rolling process The cold-reduced sheet that 0.9mm is thick, then it is rolled into the thick cold-reduced sheet of 0.55mm by four-pass cold rolling process, after parking 24 hours, then by 5th passage cold rolling process is rolled into the cold-reduced sheet that 0.32mm is thick, parks 24 hours the most again；
5th step, paper tinsel rolls: by the first passage paper tinsel, cold-reduced sheet thick for 0.32mm is rolled operation and is rolled into the thick aluminium foil of 0.18mm, Rolled operation by the second passage paper tinsel again and be rolled into the thick aluminium foil of 0.1mm, after parking 24 hours, then rolled operation rolling by the 3rd passage paper tinsel Become aluminium foil thick for 0.062mm, then park 24 hours, finally rolled operation by four-pass paper tinsel and be rolled into aluminium foil one-tenth thick for 0.043mm Product.
In the present embodiment, made aluminium foil performance after testing meets: ratio electric capacity >=520 μ f, grain size≤1 grade, tensile strength 265MPa, yield strength 255MPa, elongation percentage >=1%, when 25 DEG C, thermal conductivity is 225W/(m.k).After chemically blackening processes, aluminum Paper tinsel surface oxidation film colorability is strong, thickness is homogeneous, excellent surface quality, meets the skill as solar energy collecting accumulation of heat aluminium foil Art index request.
Embodiment 3
A kind of solar energy collecting accumulation of heat aluminium foil, its thickness is 0.045mm, and the chemical composition of this aluminium foil is by mass percentage For: Fe:0. 1%, Si:0.07%, Cu:0.08%, Mn :≤0.005%, Mg :≤0.005%, Zn :≤0.005%, Ti:0.01%, Surplus is Al and inevitable impurity.
Manufacturing process being distinguished as on the basis of embodiment 1 of above-mentioned solar energy collecting accumulation of heat aluminium foil:
4th step, cold rolling: cast-rolling stock thick for 6.5 ± 0.2mm is rolled into 3.6mm thickness by the first passage cold rolling process Cold-reduced sheet, then it is rolled into the thick cold-reduced sheet of 1.9mm by the second passage cold rolling process, then be rolled into by the 3rd passage cold rolling process The cold-reduced sheet that 1.1mm is thick, then it is rolled into the thick cold-reduced sheet of 0.65mm by four-pass cold rolling process, after parking 24 hours, then by 5th passage cold rolling process is rolled into the cold-reduced sheet that 0.36mm is thick, parks 24 hours the most again；
5th step, paper tinsel rolls: by the first passage paper tinsel, cold-reduced sheet thick for 0.36mm is rolled operation and is rolled into the thick aluminium foil of 0.2mm, Rolled operation by the second passage paper tinsel again and be rolled into the thick aluminium foil of 0.12mm, after parking 24 hours, then rolled operation by the 3rd passage paper tinsel and roll Make the thick aluminium foil of 0.066mm, then park 24 hours, finally rolled operation by four-pass paper tinsel and be rolled into the thick aluminium foil of 0.045mm Finished product.
In the present embodiment, made aluminium foil performance after testing meets: ratio electric capacity >=520 μ f, grain size≤1 grade, tensile strength 250MPa, yield strength 240MPa, elongation percentage >=1%, when 25 DEG C, thermal conductivity is 240W/(m.k).After chemically blackening processes, aluminum Paper tinsel surface oxidation film colorability is strong, thickness is homogeneous, excellent surface quality, meets the skill as solar energy collecting accumulation of heat aluminium foil Art index request.

Claims (5)

1. the manufacture method of a solar energy collecting accumulation of heat aluminium foil, it is characterised in that: the chemical composition of this aluminium foil presses percent mass Ratio is calculated as: Si:0.01～0.07%, Fe:0.01～0.12%, Cu:0.08～0.12%, Mn :≤0.005%, Zn :≤ 0.005%, Mg :≤0.005%, Ti:0.01～0.03%, surplus is Al and inevitable impurity；
Step is as follows:
(1) strand: the raw material good by proportioning, except Ti raw material, heating is smelted into aluminium alloy melt, then casting, and in casting In operation, the speed with 330～400mm/min adds AlTi in melt5B B alloy wire, casting goes out the casting that 6.5 ± 0.2mm is thick Blank；
(2) cold rolling: to use multi-pass cold rolling process that the cast-rolling stock that 6.5 ± 0.2mm is thick is rolled into 0.32～0.38mm thickness Cold-reduced sheet；
(3) paper tinsel rolls: use multi-pass paper tinsel roll operation the cold-reduced sheet that 0.32～0.38mm is thick is rolled into thickness be 0.044 ± The aluminium foil that 0.001mm is thick, obtains aluminum foil finished product.
The manufacture method of solar energy collecting accumulation of heat aluminium foil the most according to claim 1, it is characterised in that: the thickness of described aluminium foil Degree is 0.044 ± 0.001mm, and tensile strength is 250～280MPa, yield strength 235～265MPa, elongation percentage >=1%, 25 DEG C Time thermal conductivity >=225W/ (m K).
The manufacture method of solar energy collecting accumulation of heat aluminium foil the most according to claim 1, it is characterised in that: institute in step (1) Stating and use double-stage filtering case to carry out melt filtration in casting operation, screen plate number is upper strata 40ppi, lower floor 60 ppi.
The manufacture method of solar energy collecting accumulation of heat aluminium foil the most according to claim 1, it is characterised in that: described multi-pass is cold Roll operation specifically, cast-rolling stock thick for 6.5 ± 0.2mm is rolled into the cold of 3.2～3.6mm thickness by the first passage cold rolling process Roll plate, then be rolled into 1.6～1.9mm thick cold-reduced sheets by the second passage cold rolling process, then by the 3rd passage cold rolling process rolling Become 0.9～1.1mm thick cold-reduced sheet, then be rolled into 0.55～0.65mm thick cold-reduced sheet by four-pass cold rolling process, park After 24～48 hours, then be rolled into 0.32～0.38mm thick cold-reduced sheet by the 5th passage cold rolling process, park the most again 24～ 48 hours.
The manufacture method of solar energy collecting accumulation of heat aluminium foil the most according to claim 1, it is characterised in that: described multi-pass paper tinsel Roll operation specifically, 0.32～0.38mm thick cold-reduced sheet is rolled operation by the first passage paper tinsel be rolled into 0.18～0.21mm thickness Aluminium foil, then rolled operation by the second passage paper tinsel and be rolled into 0.1～0.12mm thick aluminium foil, after parking 24～48 hours, then by the 3rd Passage paper tinsel rolls operation and is rolled into 0.062～0.068mm thick aluminium foil, then parks 24～48 hours, is finally rolled by four-pass paper tinsel Operation is rolled into the aluminium foil that 0.044 ± 0.001mm is thick.
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JP2970852B2 (en) * 1989-03-13 1999-11-02 日本製箔株式会社 Manufacturing method of aluminum alloy foil for cathode of electrolytic capacitor
CN103436746B (en) * 2013-07-30 2016-04-13 江阴新仁科技有限公司 Special rare-earth containing aluminium Alloy Foil of a kind of lug and preparation method thereof

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