CN102351407B - Manufacturing method for aluminum melting quartz crucible - Google Patents
Manufacturing method for aluminum melting quartz crucible Download PDFInfo
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- CN102351407B CN102351407B CN201110246406.4A CN201110246406A CN102351407B CN 102351407 B CN102351407 B CN 102351407B CN 201110246406 A CN201110246406 A CN 201110246406A CN 102351407 B CN102351407 B CN 102351407B
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- quartz crucible
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- molten aluminium
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 139
- 239000010453 quartz Substances 0.000 title claims abstract description 88
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 66
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000002844 melting Methods 0.000 title claims abstract description 51
- 230000008018 melting Effects 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000010439 graphite Substances 0.000 claims abstract description 27
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 24
- 239000004576 sand Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 13
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000007667 floating Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 238000001035 drying Methods 0.000 claims abstract description 3
- 239000004411 aluminium Substances 0.000 claims description 54
- 239000011521 glass Substances 0.000 claims description 13
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000010422 painting Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 12
- 239000006004 Quartz sand Substances 0.000 abstract description 11
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract description 7
- 239000011135 tin Substances 0.000 abstract description 7
- 229910052802 copper Inorganic materials 0.000 abstract description 6
- 239000010949 copper Substances 0.000 abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052793 cadmium Inorganic materials 0.000 abstract description 5
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011133 lead Substances 0.000 abstract description 5
- 229910052725 zinc Inorganic materials 0.000 abstract description 5
- 239000011701 zinc Substances 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract description 3
- 150000002739 metals Chemical class 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 abstract 2
- 238000005520 cutting process Methods 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 description 66
- 238000001514 detection method Methods 0.000 description 5
- 238000005058 metal casting Methods 0.000 description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 5
- 229910010271 silicon carbide Inorganic materials 0.000 description 5
- 230000003245 working effect Effects 0.000 description 5
- 241000209456 Plumbago Species 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 229960001866 silicon dioxide Drugs 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010814 metallic waste Substances 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 238000009461 vacuum packaging Methods 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/09—Other methods of shaping glass by fusing powdered glass in a shaping mould
- C03B19/095—Other methods of shaping glass by fusing powdered glass in a shaping mould by centrifuging, e.g. arc discharge in rotating mould
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention discloses a manufacturing method for an aluminum melting quartz crucible, and relates to a manufacturing method for an industrial crucible which is matched with a small and medium-sized aluminum melting electric furnace used in casting industries of metals of aluminum, tin, lead, zinc, copper, cadmium and the like, in particular to the manufacturing method for the aluminum melting quartz crucible which is formed by melting high-purity quartz sand. The manufacturing method for the aluminum melting quartz crucible comprises the following steps of: (1) manufacturing a proper electric arc process quartz crucible melting mould according to preset size and thickness ranges of the aluminum melting quartz crucible; (2) uniformly adding high-purity quartz sand with thickness of 1.5-5 cm in a rotary graphite or alloy mould on electric arc process quartz crucible melting equipment when melting the quartz crucible, and melting in the center of the mould by taking a graphite electrode as a heating element; and (3) cutting off burrs on an upper port after melting of the crucible, demolding and cooling, removing all floating sand on the outer layer, soaking by using hydrofluoric acid with concentration of 2-5 percent for 2-3 hours, cleaning with pure water, drying at the temperature of 100-300 DEG C, and checking and packaging to obtain a finished aluminum melting quartz crucible.
Description
Technical field
The making method of a kind of molten aluminium quartz crucible of the present invention relates to is the making method of the supporting a kind of industrial crucible of the middle-size and small-size molten aluminium electric furnace that uses with the casting of metals industry such as aluminium, tin, lead, zinc, copper, cadmium, is specifically related to a kind of making method of the molten aluminium quartz crucible of founding with the quartz sand of higher degree.
Background technology
Molten aluminium electric furnace mainly for the non-ferrous metal of low melting point as melting, fusing or insulations such as aluminium, tin, lead, zinc, copper, cadmium and Babbitt metals, in metal spare and accessory parts manufacturing enterprise, use very general.Single fusing amount is used graphite or alloy crucible as loading and the carrier of heat fused metal at the middle and small EAF great majority below 1500 kilograms, the also use to some extent of silicon carbide crucible that recent years is newly developed.Above-mentioned metal under molten state especially aluminium and tin has strong tack and corrodibility, the metal of melting is constantly attached on graphite or metallic crucible thicker in process of production, heating efficiency is more and more low, impel graphite simultaneously, constantly there is vigorous oxidation in the surface of various alloys and silicon carbide crucible, sometimes part seriously comes off, the not only mass formation negative impact to cast product, and in production process, be difficult to check out the defect of crucible, work-ing life of crucible is short and be difficult to specifically determine, perforation often meets accident, molten metal leakage, the accident that electric furnace damages, to enterprise, cause damage.Be about one month the work-ing life of general graphite or alloy crucible, wastage rate 20% left and right of aluminium, and enterprise's expendable cost is high, and a large amount of discarded related metals that adhere to of crucible cause serious environmental pollution, and have potential safety hazard.
Summary of the invention
The object of the invention is for above-mentioned weak point, provide and take the making method of a kind of molten aluminium quartz crucible that glass sand is raw material, it is supporting that this molten aluminium quartz crucible is used for the middle-size and small-size molten aluminium electric furnace that uses with the casting of metals industry such as aluminium, tin, lead, zinc, copper, cadmium, with lower cost solve above-mentioned metal under molten state especially aluminium and tin to the graphite of prior art or metallic crucible tack and corrosion problems.
A kind of making of molten aluminium quartz crucible is to take following technical scheme to realize:
A kind of making method of molten aluminium quartz crucible is as follows:
1, be first according to pre-set molten aluminium quartz crucible size and thickness range, make suitable arc process quartz crucible and found mould, described arc process quartz crucible is founded mould and is arranged to " U " font or " V " font, crucible melting mould interior diameter suitable for reading (internal diameter) is 400-800mm, the bottom interior diameter of " U " font crucible die is slightly less than interior diameter suitable for reading, is highly 400-1200mm; Described quartz crucible is founded mould and is adopted graphite or alloy mold.
Described pre-set molten aluminium quartz crucible side section is arranged to " U " font or " V " font, the outside diameter suitable for reading (external diameter) of crucible is 400-800mm, the bottom outside diameter of " U " font crucible is slightly less than outside diameter suitable for reading, crucible wall thickness is 10-30mm, bottom thickness is a bit larger tham wall thickness, is highly 400-1200mm.
While 2, founding quartz crucible, the glass sand that evenly adds thickness 1.5-5cm in graphite on arc process quartz crucible melting equipment in rotation or alloy mold, in described glass sand, the metallic element total impurities such as Al, Li, Na, K, Fe, Ti, Ca, Mg is less than 100ppm, according to crucible thickness, set the length of strength of current and melting time, strength of current scope is at 1500-2000A, melting time 20-60 minute, mold center take Graphite Electrodes as heating original paper found, the power of the melting equipment that requires is 600-1200KVA.
3, crucible melting complete depanning cooling after, by burr excision suitable for reading, outer floating sand eliminates, use again the hydrofluoric acid dips 2-3 hour of 2-5% concentration, then with pure water more than resistivity 15 megaohms, clean 3-5 time, at 100-300 ℃ of temperature, dry, then check, pack, molten aluminium quartz crucible gets product.
After crucible melting is shaped, also can in crucible, spray again the more highly purified glass sand that the metallic element total impurities such as one deck Al, Li, Na, K, Fe, Ti, Ca, Mg are less than 20ppm, and then heating and melting, strength of current scope is at 1500-2000A, melting time 5-20 minute, more than forming one deck 0.1 mm, inner surface of crucible melting there is more highly purified quartz glass layer, to improve the quality of crucible.
After crucible cleaning, drying, also barium oxide or the zirconia coating of the cold painting one deck of surface artificial or equipment 0.1-0.5mm thickness within it, can improve the quality of crucible equally.Wherein barium oxide or zirconic purity are more than 99.99%, and during allotment spray coating liquor, the ratio of barium oxide or Zirconium oxide powder and the above pure water of resistivity 15 megaohm is 1:30.
Described found raw material-glass sand that quartz crucible adopts, its purity is that dioxide-containing silica is more than 99.5%.The described more highly purified quartz glass layer that has in the painting of inner surface of crucible heat, the dioxide-containing silica of its raw material glass sand is more than 99.99%, major impurity composition is: Al < 20ppm, Na, Ti be < 5ppm respectively, Fe, Ca, Mg be < 3ppm respectively, and Li, K be < 2ppm respectively.
The making method of a kind of molten aluminium quartz crucible of the present invention, to make quartz crucible a kind of and that molten aluminium electric furnace matches, the main detection index of being somebody's turn to do " molten aluminium quartz crucible " product comprises two aspects: (one), outward appearance, comprise crackle, scuffing, pit, surface attachments and contamination, spot and devitrification point, bubble, ripple etc., major requirement inner surface of crucible is smooth bright and clean, there is no 2 millimeters of above bubble populations of intensive diameter and surpasses 2 millimeters of above open bubbles of 10 diameters; (2), foreign matter content, mainly comprise that 8 kinds of common content of impurities general requirements such as A1, Fe, Ca, Cu, K, Na, Li, B are below 50ppm, what specification of quality was lower also can be loosened to below 100ppm.
Compare with electronic-grade and solar level quartz crucible common on market, because size and the thickness of molten aluminium quartz crucible are larger, the making method of the molten aluminium quartz crucible that the present invention proposes is larger to the power requirement of equipment, but relatively much lower to the purity requirement of raw material quartz sand, it is also loose a lot of that the product of crucible detects index, and the product qualified rate in production is higher.
Quartz crucible has the advantages that thermal conductivity is good, high temperature resistant, corrosion-resistant, highly polished.The molten aluminium quartz crucible of producing with the present invention is through actual service test, at the temperature below 900 ℃, can on average use continuously more than 6 months, under same power and control condition, contrast plumbago crucible Energy Intensity Reduction is more than 50%, the wastage rate of aluminium reduce more than 30%, except being subject to external force collision, can there is not rupture perforation accident, mean lifetime is 6 times of plumbago crucible, production cost and selling price also only have 6 times of left and right of plumbago crucible, and the ratio of performance to price is far above various graphite, alloy and the silicon carbide crucible used at present in industry.But higher its cost of manufacture of the purity of quartz crucible is also higher, on the internal surface of crucible, arrange that thinner high-purity quartz glass layer can reach high temperature resistant, sticking power is low, the effect of corrosion-resistant, Energy Intensity Reduction, long service life, can greatly reduce cost of manufacture again.
The various coatings that increase at inner surface of crucible all can increase the intensity of crucible, extend the work-ing life of crucible.
Gordian technique of the present invention is:
According to the large but lower feature of use temperature of molten aluminium quartz crucible size and thickness, on the basis of existing solar level quartz crucible production technology, adopt the arc process quartz crucible melting equipment of relatively high power and die size, take and found the quartz crucible of dimension compared with the quartz sand of low-purity as raw material.This quartz crucible is used for replacing traditional graphite, alloy or silicon carbide crucible, and relative cost is low, practical.
The present invention can solve casting of metals industry crucible wall and adhere to two hang-ups that cause thermo-efficiency decline, raw metal waste and crucible perforation leakage material often occurs, in improve production efficiency and product quality, significantly reduce energy consumption and raw metal loss, reduce environmental pollution and the wasting of resources, increase economic efficiency.
Accompanying drawing explanation
Below with reference to crucible accompanying drawing, the invention will be further described:
Fig. 1 is the crucible structure schematic diagram of the making method embodiment 1 of a kind of molten aluminium quartz crucible of the present invention.
Fig. 2 is the crucible structure schematic diagram of the making method embodiment 2 of a kind of molten aluminium quartz crucible of the present invention.
embodiment
With reference to accompanying drawing 1,2, a kind of making method of molten aluminium quartz crucible is as follows:
1, be first according to pre-set molten aluminium quartz crucible size and thickness range, make suitable arc process quartz crucible and found mould, described arc process quartz crucible is founded mould and is arranged to " U " font or " V " font, crucible melting mould interior diameter suitable for reading (internal diameter) is 400-800mm, the bottom interior diameter of " U " font crucible die is slightly less than interior diameter suitable for reading, is highly 400-1200mm; Described quartz crucible is founded mould and is adopted graphite or alloy mold.
Described pre-set molten aluminium quartz crucible side section is arranged to " U " font or " V " font, the outside diameter suitable for reading of crucible is 400-800mm, the bottom outside diameter of " U " font crucible is less than outside diameter suitable for reading, sidewall of crucible 1 is thick is 10-30mm, bottom 2 thickness are a bit larger tham wall thickness, are highly 400-1200mm.
While 2, founding quartz crucible, the glass sand that evenly adds thickness 1.5-5cm in graphite on arc process quartz crucible melting equipment in rotation or alloy mold, in described glass sand, the metallic element total impurities such as Al, Li, Na, K, Fe, Ti, Ca, Mg is less than 100ppm, according to crucible thickness, set the length of strength of current and melting time, strength of current scope is at 1500-2000A, melting time 20-60 minute, mold center take Graphite Electrodes as heating original paper found, the power of the melting equipment that requires is generally 600-1200KVA.
3, crucible melting complete depanning cooling after, by burr excision suitable for reading, outer floating sand eliminates, use again the hydrofluoric acid dips 2-3 hour of 2-5% concentration, then with pure water more than resistivity 15 megaohms, clean 3-5 time, at 100-300 ℃ of temperature, dry, then check, pack, molten aluminium quartz crucible gets product.
Embodiment 1: as shown in Figure 1, the molten aluminium quartz crucible opening of producing with arc process and bottom are circular, and side section slightly becomes " U " font, and sidewall of crucible 1 is in the arc-shaped excessively with bottom 2.The back cut diameter 590mm of crucible, the diameter 550mm at place, " L " angle, nearly bottom, crucible wall thickness 20mm, bottom thickness 22-25mm, height 690mm.
The power of melting equipment is 630KVA, for founding the content of the quartz sand of quartz crucible and the silicon-dioxide of finished product crucible, be more than 99.9%, major impurity composition requires: Al < 50ppm, Li, Na, K, Ti be < 20ppm respectively, Fe < 10ppm, Ca, Mg be < 15ppm respectively.
1, first, the graphite jig inwall in low speed rotation and bottom manually evenly add raw material quartz sand to amount to approximately 50 kilograms, and bottom is slightly thicker than wall portion.
2, by mould playback, the Graphite Electrodes that closes, progressively strengthens electric current to 1650A, melting time 35 minutes.
3, progressively reduce the electric current of Graphite Electrodes, shift out mould, after crucible melting is shaped, by special-purpose sandblast apparatus, the content that adds the more highly purified silicon-dioxide of part at inner surface of crucible is more than 99.99% quartz sand, and then heating and melting, and strength of current scope is at 1500-2000A, melting time 5-20 minute, at the more highly purified quartz glass layer 3 that has of the above thickness of inner surface of crucible formation 0.1mm.These quartz glass layer 3 major impurity compositions are: Al < 20ppm, Na, Ti be < 5ppm respectively, Fe, Ca, Mg be < 3ppm respectively, and Li, K be < 2ppm respectively, higher than the purity of sidewall of crucible 1 and bottom 2.
4, the naturally cooling demoulding, quartz crucible Preliminary detection, cold working sand-blast eliminate crucible appearance floating sand, cut off burr suitable for reading, chamfering, quartz crucible secondary detection, then use the hydrofluoric acid dips 2-3 hour of 2-5% concentration, with resistivity 18 megaohm high purity waters, clean 3 times, ultrasonic wave spray, 300 ℃ of oven dry, three checks of quartz crucible, vacuum packaging, finished product warehouse-in.
Embodiment 2: as shown in Figure 2, the molten aluminium quartz crucible opening of producing with arc process and bottom are circular, and side section slightly becomes " V " font, sidewall of crucible 1 and bottom 2 transition in the arc-shaped.The back cut diameter 800mm of crucible, the diameter 300mm at place, " L " angle, nearly bottom, the thick 25mm of sidewall of crucible 1, bottom 2 thickness 35mm, height 1200mm.
The power of melting equipment is 1100KVA, for founding the content of the quartz sand of quartz crucible and the silicon-dioxide of finished product crucible, be more than 99.5%, major impurity composition requires: Al < 100ppm, Li, Na, K, Ti be < 30ppm respectively, Fe < 10ppm, Ca, Mg be < 20ppm respectively.
1, first, the graphite jig inwall in low speed rotation and bottom manually evenly add raw material quartz sand to amount to approximately 180 kilograms, and bottom is slightly thicker than wall portion.
2, by mould playback, the Graphite Electrodes that closes, progressively strengthens electric current to 1850A, melting time 60 minutes.
3, the naturally cooling demoulding, quartz crucible Preliminary detection, cold working sand-blast eliminates the floating sand of crucible appearance, cuts off burr suitable for reading, chamfering, quartz crucible secondary detection, use again the hydrofluoric acid dips 2-3 hour of 2-5% concentration, with resistivity 18 megaohm high purity waters, clean 5 times, ultrasonic wave spray, 200 ℃ of oven dry, molten aluminium quartz crucible gets product.
4, at thick barium oxide or the zirconia coating of inner wall of quartz crucible cold painting 0.1-0.5mm.
5, three checks of quartz crucible, vacuum packaging, finished product warehouse-in.
The molten aluminium quartz crucible that the making method of the molten aluminium quartz crucible of the present invention is made is through detecting:
Inner surface of crucible is highly polished, does not have diameter to surpass the obvious pit of 5mm, does not have diameter to surpass the open bubble of 2mm, and the stain that diameter surpasses 2mm is on average no more than 5.At 1050 ℃ of high temperature resistant deformation test results of empty crucible 100 hours without obviously distortion; Molten aluminium casting use-testing shows: on average economize on electricity more than 50%, the wastage rate of aluminium reduce more than 30%, and natural work-ing life was over 6 months.
Above-mentioned quartz crucible, except using for aluminium casting industry, is also applicable to the casting of metals industries such as tin, lead, zinc, copper, cadmium and uses.
The making method of a kind of molten aluminium quartz crucible of the present invention is to make quartz crucible a kind of and that molten aluminium electric furnace matches.Gordian technique of the present invention is, according to the large but lower feature of use temperature of molten aluminium quartz crucible size and thickness, on the basis of existing solar level quartz crucible production technology, adopt the arc process quartz crucible melting equipment of relatively high power and die size, take and found the quartz crucible of dimension compared with the quartz sand of low-purity as raw material.
The various coatings that increase at inner surface of crucible all can increase the intensity of crucible, extend the work-ing life of crucible.This quartz crucible is used for replacing traditional graphite, alloy or silicon carbide crucible, and relative cost is low, practical.
The present invention can solve casting of metals industry crucible wall and adhere to two hang-ups that cause thermo-efficiency decline, raw metal waste and crucible perforation leakage material often occurs, in improve production efficiency and product quality, significantly reduce energy consumption and raw metal loss, reduce environmental pollution and the wasting of resources, increase economic efficiency.
Claims (7)
1. a making method for molten aluminium quartz crucible, is characterized in that:
(1) be first according to pre-set molten aluminium quartz crucible size and thickness range, make suitable arc process quartz crucible and found mould, described arc process quartz crucible is founded mould and is arranged to " U " font or " V " font, crucible melting mould interior diameter suitable for reading is 400-800mm, the bottom interior diameter of " U " font crucible die is slightly less than interior diameter suitable for reading, height 400-1200mm;
(2) while founding quartz crucible, the glass sand that evenly adds thickness 1.5-5cm in graphite on arc process quartz crucible melting equipment in rotation or alloy mold, in described glass sand, Al, Li, Na, K, Fe, Ti, Ca, Mg metallic element total impurities are less than 100ppm, according to crucible thickness, set the length of strength of current and melting time, strength of current scope is at 1500-2000A, melting time 20-60 minute, mold center take Graphite Electrodes as heating original paper found, the power of the melting equipment that requires is 600-1200KVA;
(3) crucible melting complete depanning cooling after, by burr excision suitable for reading, outer floating sand eliminates, use again the hydrofluoric acid dips 2-3 hour of 2-5% concentration, then with pure water more than resistivity 15 megaohms, clean 3-5 time, at 100-300 ℃ of temperature, dry, then check, pack, molten aluminium quartz crucible gets product.
2. the making method of molten aluminium quartz crucible according to claim 1, it is characterized in that described pre-set molten aluminium quartz crucible side section is arranged to " U " font or " V " font, the outside diameter suitable for reading of crucible is 400-800mm, the bottom outside diameter of " U " font crucible is slightly less than outside diameter suitable for reading, crucible wall thickness is 10-30mm, bottom thickness is a bit larger tham wall thickness, is highly 400-1200mm.
3. the making method of molten aluminium quartz crucible according to claim 1, is characterized in that described quartz crucible founds mould and adopt graphite or alloy mold.
4. the making method of a kind of molten aluminium quartz crucible according to claim 1, it is characterized in that after crucible melting is shaped, in crucible, spray again the more highly purified glass sand of one deck, and then heating and melting, strength of current scope is at 1500-2000A, melting time 5-20 minute has more highly purified quartz glass layer, to improve the quality of crucible more than inner surface of crucible melting forms one deck 0.1 mm.
5. the making method of a kind of molten aluminium quartz crucible according to claim 1, it is characterized in that after crucible cleaning, drying, barium oxide or the zirconia coating of the cold painting one deck of surface artificial or equipment 0.1-0.5mm thickness within it, can improve the quality of crucible equally.
6. the making method of a kind of molten aluminium quartz crucible according to claim 1, is characterized in that the described raw material-glass sand that quartz crucible adopts of founding, and its purity is that dioxide-containing silica is more than 99.5%.
7. the making method of a kind of molten aluminium quartz crucible according to claim 4, it is characterized in that the described more highly purified quartz glass layer that has in the painting of inner surface of crucible heat, the dioxide-containing silica of its raw material glass sand is more than 99.99%, major impurity composition is: Al < 20ppm, Na, Ti be < 5ppm respectively, Fe, Ca, Mg be < 3ppm respectively, and Li, K be < 2ppm respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110246406.4A CN102351407B (en) | 2011-08-25 | 2011-08-25 | Manufacturing method for aluminum melting quartz crucible |
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| CN201110246406.4A CN102351407B (en) | 2011-08-25 | 2011-08-25 | Manufacturing method for aluminum melting quartz crucible |
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| CN102351407A CN102351407A (en) | 2012-02-15 |
| CN102351407B true CN102351407B (en) | 2014-02-05 |
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| CN103663999A (en) * | 2013-08-03 | 2014-03-26 | 济宁祥润光伏科技有限公司 | Process for producing thermal coating zirconia on quartz crucible |
| CN103803780A (en) * | 2013-12-27 | 2014-05-21 | 施晓霞 | Preparation method of crystal pot for cooking |
| CN104073884A (en) * | 2014-07-08 | 2014-10-01 | 苏州普京真空技术有限公司 | Composite quartz ceramic crucible |
| CN104445886A (en) * | 2014-11-24 | 2015-03-25 | 许昌天戈硅业科技有限公司 | Quartz crucible production process |
| CN104402204B (en) * | 2014-11-24 | 2017-09-29 | 许昌天戈硅业科技有限公司 | A kind of silica crucible mould |
| CN105088145B (en) * | 2015-08-19 | 2017-03-29 | 京东方科技集团股份有限公司 | For the crucible and its manufacture method of OLED evaporation sources |
| CN105239159A (en) * | 2015-09-10 | 2016-01-13 | 上海超硅半导体有限公司 | Design and preparation method of quartz crucible for growth of single crystal silicon of czochralski method |
| CN109467306B (en) * | 2018-11-08 | 2021-10-19 | 锦州佑鑫石英科技有限公司 | Processing method of high-strength quartz crucible for monocrystalline silicon production |
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| GB8819693D0 (en) * | 1988-08-18 | 1988-09-21 | Tsl Group Plc | Improved vitreous silica articles |
| DE19962449C2 (en) * | 1999-12-22 | 2003-09-25 | Heraeus Quarzglas | Quartz glass crucibles and process for its production |
| CN101891376A (en) * | 2009-05-18 | 2010-11-24 | 扬州华尔光伏科技有限公司 | Production process of large-size quartz crucibles |
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