WO2023079034A1 - Composition de verre sodo-calcique incolore - Google Patents
Composition de verre sodo-calcique incolore Download PDFInfo
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- WO2023079034A1 WO2023079034A1 PCT/EP2022/080738 EP2022080738W WO2023079034A1 WO 2023079034 A1 WO2023079034 A1 WO 2023079034A1 EP 2022080738 W EP2022080738 W EP 2022080738W WO 2023079034 A1 WO2023079034 A1 WO 2023079034A1
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- 239000000203 mixture Substances 0.000 title claims abstract description 69
- 239000005361 soda-lime glass Substances 0.000 title claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 16
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 14
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 11
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims abstract description 8
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 8
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 8
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 8
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 7
- 239000011593 sulfur Substances 0.000 claims abstract description 7
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 6
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052718 tin Inorganic materials 0.000 claims abstract description 6
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 5
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 24
- 230000002747 voluntary effect Effects 0.000 claims description 12
- PEUPCBAALXHYHP-UHFFFAOYSA-L zinc;selenite Chemical compound [Zn+2].[O-][Se]([O-])=O PEUPCBAALXHYHP-UHFFFAOYSA-L 0.000 claims description 8
- VQCBHWLJZDBHOS-UHFFFAOYSA-N erbium(III) oxide Inorganic materials O=[Er]O[Er]=O VQCBHWLJZDBHOS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052711 selenium Inorganic materials 0.000 claims description 6
- 229910052691 Erbium Inorganic materials 0.000 claims description 5
- 239000011701 zinc Substances 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 229910052712 strontium Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims 1
- 239000011521 glass Substances 0.000 description 83
- 238000004519 manufacturing process Methods 0.000 description 19
- 238000007670 refining Methods 0.000 description 17
- 239000002994 raw material Substances 0.000 description 15
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 7
- 229910021653 sulphate ion Inorganic materials 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000002845 discoloration Methods 0.000 description 6
- 239000011669 selenium Substances 0.000 description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000005070 ripening Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 235000013980 iron oxide Nutrition 0.000 description 2
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical compound [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000184 acid digestion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229940000489 arsenate Drugs 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 239000006063 cullet Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000004876 x-ray fluorescence Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
Definitions
- the invention relates to the field of the glass industry.
- the melting of the constituent materials of glass requires the input of a large amount of energy.
- the temperature of the glass bath is around 1300 to 1500°C.
- the glass is intended for household use, for example drinking glasses, or culinary use, for example kitchen containers.
- the oven is subjected to very high thermal and mechanical stresses.
- the furnace is constructed with high quality refractory linings. These refractory coatings are expensive and sensitive to certain constituents of the glass susceptible to chemical reaction. As refractory linings are poor conductors of heat, the heating of the glass bath is carried out from inside the furnace, for example from above or in the molten glass bath.
- a liquid or gaseous fuel flame burner is placed between the glass bath and the top of the furnace called the vault.
- the glass bath is heated by radiation for the most part.
- the gas outlet temperature is 1300 to 1600°C depending on the glass family.
- the manufacture of glass releases large quantities of gases.
- the glass bath is degassed for several hours to prevent the formation of bubbles in the glass.
- fining additives such as sulfates can be used.
- the furnace operates by continuous campaign of glass of chosen composition which may vary during the campaign.
- the invention proposes a composition of colorless soda-lime glass, comprising by mass SiC from 68 to 78%, Na2 ⁇ from 8 to 18%, K2O from 0 to 10%, CaO from 7 to 12%, MgO from 0 to 10%, ZnO from 0 to 10%, BaO from 0 to
- a Na2 ⁇ content above 18% increases the wear of furnace refractories and increases the coefficient of expansion.
- a CaO content of less than 7% decreases the slope of the viscosity-temperature curve and slows down the speed of glass forming on shaping machines.
- a CaO content greater than 12% brings a risk of devitrification by crystallization.
- a ZnO content above 10% lowers the softening point of glass and increases the density of glass.
- a BaO content above 10% lowers the softening point of glass and increases the density of glass.
- a B2O3 content greater than 1% increases refractory corrosion and evaporates with deposits downstream.
- a total cerium content expressed in the form of CeO2 greater than 0.12% causes discoloration of the glass by metamerism.
- a total iron content expressed as Fe2O3 of less than 50 ppm makes the selection of raw materials more difficult, as low iron content is not generally available for sources of silicon, calcium and sodium, and limits cullet recycling.
- the glass bath becomes transparent to infrared, resulting in an increase in temperature near the floor and the walls of the furnace and accelerated wear of the refractories.
- a total iron content expressed in the form of Fe2 ⁇ 3 greater than 1200 ppm causes a coloration that is difficult to combat, especially without the addition of an oxidant to oxidize the FeO to less colored Fe2 ⁇ 3.
- the Applicant has noticed that the redox corresponding to the ferrous iron/ferric iron ratio was important for successful refining at low sulphate levels.
- the redox has an influence on the solubility of SO3.
- the solubility minimum is around a redox close to 55.
- Redox is defined here as the FeO (ferrous)/Fe2O3 (ferric) molar ratio.
- the Applicant realized that in an air and natural gas combustion furnace, for a redox of 40, the mass content of SC in the glass had a maximum of approximately 0.20%. In other words, a degassing of sulphates occurs in case of higher content in the glass bath. On the other hand, obtaining a lower mass content of SOadu glass is difficult under identical production conditions. Indeed, by increasing the refining period, it is possible to reduce the quantity of refining agent but at the cost of a lower production in proportion to the inverse of the refining period and an increase in the consumption of energy and furnace wear related to the ton of glass produced.
- the redox can be reduced to a value ranging from 10 to 15.
- An ORP range of 20 to 45 is preferred.
- a redox range between 25 and 40 is more preferred.
- a redox of 30 to 40 is even better.
- the composition comprises by mass less total sulfur expressed as SO3 than the maximum allowed by the redox and the composition of the glass.
- the composition comprises by mass less than 0.074% total sulfur expressed as SO3. Condensation is reduced. The reactivity of the glass with the components of the production chain is reduced. [33] In one embodiment, the composition comprises TiC by weight from 0 to 1%.
- the composition comprises by mass F from 0 to 0.3%. Beyond 0.3%, mold corrosion is increased.
- the composition comprises by mass SiO2 from 71.0 to 73.0%, Na2O from more than 8 to less than 15%, K2O from 0 to 0.5%, CaO from 9 to less 12%, MgO from 1 to 2%, ZnO from 0 to 1%, BaO from 0 to 2%, Al2O3 from 0 to 2%, at most 0.1% of total cerium expressed as CeO2, ZrO2 less than 0.10%, Er2O3 less than 200 ppm, and redox less than 40.
- the composition comprises by mass from 13.0 to 14.0% Na2O.
- the composition comprises by mass from 0 to 0.2% K2O.
- the composition comprises by mass from 10.0 to 11.4% CaO.
- the composition comprises by mass less than 0.10% BaO.
- the composition comprises by weight from 1.0 to 1.90% Al2O3. At less than 1% Al2O3, the finished glass has reduced chemical resistance.
- the composition comprises less than 0.05% ZrO2 by mass.
- the composition comprises by weight less than 150 ppm of E ⁇ C .
- Discoloration can be obtained by Selenium, for example in the form of zinc selenite ZnSeO3 CAS
- the composition is without voluntary supply of Ti species.
- the composition is without voluntary supply of species B.
- the composition is without voluntary supply of Zn species.
- the composition is without voluntary contribution of Sr species.
- the composition is without voluntary supply of Sn species.
- the composition is without the voluntary contribution of Ce species.
- the composition is without the voluntary supply of Cr species.
- the composition comprises, by mass, BaO from 0 to 0.06%, preferably from 0 to 0.05%.
- Optical properties are obtained by other chemical species.
- the composition comprises by mass from 100 to 300 ppm of total iron expressed as Fe2O3.
- the composition comprises by mass from 100 to 250 ppm of total iron expressed as Fe2O3.
- the composition comprises by weight greater than 300 to 900 ppm total iron expressed as Fe2O3.
- the composition comprises by mass from 300 to less than 700 ppm of total iron expressed as Fe20s.
- the composition is for household or culinary use.
- the composition includes a CIE1976 L* lightness value in total transmission greater than 94, preferably greater than 95. These values correspond to a transparent glass also called white glass.
- the ORP is at least 18.
- the ORP is at least 20.
- the composition comprises by mass SiO2 from 69.0 to 75.0%, Na2O+K2O from 12.0 to 16.0%, CaO+MgO+BaO from 10.0 to
- the mixture of raw materials means glass raw materials.
- Soda-lime glass is refined by adding sulphates. Particular attention is paid to the following points: glass working temperature, glass working level, refractory corrosion, temperatures in the fume extraction circuit and the filtration system, filtration temperatures above the dew point of the hydrochloric acid, quality of filtration on existing filtration equipment, potential impact on corrosion of steel molds used for the production of glassware.
- Platinum can also be used as a protective coating for metals subject to sublimation at the temperatures of use in the glass process or as a structural material, see WO2016135084.
- the discoloration of glass can be carried out with zinc selenite for a redox of 20 to 45.
- the ZrO2 level is between 335 and 961 ppm.
- the CaO content is between 9.03 and 11.36%.
- the MgO content is between 1.13 and 1.51%.
- the K2O rate is between 0.04 and 0.36%.
- the SiC content is between 71.48 and 72.74%.
- the Al2O3 level is between 1.39 and 3.01%.
- the Na2O level is between 13.03 and 14.37%.
- the CeC level is between 827 and 1007 ppm.
- the redox is between 18 and 36 with an average equal to 26.
- the luminance L* is between 94.35 and 95.75, with an average equal to 95.38.
- the glass is of commercial quality with a refining time without noticeable change. This reflects correct ripening. In particular, the average total refining over the period considered is less than 0.7 broth/cm 3 of glass visible under a binocular magnifying glass at magnification 20 and less than 0.55 broth of more than 100 ⁇ m per cm 3 . Daily production is stable.
- Intakes of Se, Co, Er have been made with a positive effect on discoloration in individual intake.
- the preferred mode is a contribution of the three species Se, Co and Er in the form of oxide.
- the amount of zinc selenite can be between 0.5 and 5 ppm.
- the amount of CoO can be between 0.5 and 5 ppm.
- the amount of E2C can be between 50 and 200 ppm.
- the total amount of zinc selenite, CoO and Er2O3 can be between 50 and 200 ppm.
- Table 1 below contains glass composition data measured at the end of production during production tests on an industrial furnace carried out for a sufficient period of time for a change in the composition of the raw materials to result in a stable way in the composition of the glass produced.
- measurements 1 to 12 are spaced several hours apart for regular monitoring of production.
- the contents of CaO, K2O, SiC, Al2O3, MgO, Na2O, CeC, E ⁇ C, ZnSeO3 and CoO come from the raw materials introduced. In this configuration, these species proved to be little subject to evaporation in the oven. Their contents are well controlled insofar as the composition of the raw materials introduced is constant over time.
- the Zr ⁇ 2 content depends on the operating conditions of the furnace and the downstream channels in that the zirconia in the glass comes from the refractories forming the furnace vessel and the channels. Zirconia is absent from the raw materials. The presence of zirconia reflects the wear of the oven and the channels. A high zirconia content indicates a short lifespan of the furnace between two refractory replacements and a high cost price per ton of glass produced. The zirconia content is particularly sensitive to the temperature of the glass bath and to operating incidents, for example a modification of the movements within the glass bath.
- the redox depends on the degree of oxidation of the glass and is correlated to the color of the glass in the absence of colorants. At identical redox, the color of the glass can be modified by coloring matter.
- the SO3 content depends on the quantity of sulphates introduced into the glass bath, the redox, the heating mode and the constructive parameters of the furnace.
- the Applicant sought to produce a glass soda-lime for household or culinary use, transparent, and low in SO3.
- the daily production of the kiln is equal or close to that of the same kiln with a higher sulphate content which was not expected.
- composition measurements can be made according to ASTM C169.
- the daily production varied from -5% to +10% compared to the average.
- the ZrC level is between 102 and 136 ppm.
- the CaO content is between 10.83 and 11.23%.
- the MgO content is between 1.38 and 1.42%.
- the K2O rate is between 0.03 and 0.04%.
- the SiO2 content is between 72.60 and 72.77%.
- the Al2O3 rate is between 1.50 and 1.52%.
- the Na2O level is between 13.31 and 13.36%.
- the CeC level is between 337 and 362 ppm.
- the redox is between 33 and 43 with an average equal to
- the luminance L* is between 95.36 and 95.58, with an average equal to 95.52.
- the glass is of commercial quality with a refining time without noticeable change. This reflects correct ripening. In In particular, the average total refining over the period considered is 0 broth/cm 3 of glass visible under a binocular magnifying glass at magnification 20. Daily production is very stable.
- Intakes of Se, Co, Er have been made with a positive effect on discoloration in individual intake.
- the preferred mode is a contribution of the three species Se, Co and Er in the form of oxide.
- the amount of zinc selenite can be between 0.5 and 5 ppm.
- the amount of CoO can be between 0.5 and 5 ppm.
- the amount of Er2O3 can be between 50 and 200 ppm.
- the total amount of zinc selenite, CoO and Er2O3 can be between 50 and 200 ppm.
- Table 2 below contains glass composition data measured at the end of production during production tests on an industrial furnace carried out for a sufficient period of time for a change in the composition of the raw materials to result in a stable way in the composition of the glass produced.
- measurements 1 to 4 are spaced at least 24 hours apart for regular production monitoring.
- the contents of CaO, K2O, SiC, Al2O3, MgO, Na2O, CeC, E ⁇ C and CoO come from the raw materials introduced. In this configuration, these species proved to be little subject to evaporation in the oven. Their contents are well controlled insofar as the composition of the raw materials introduced is constant over time.
- the SO3 content depends on the quantity of sulphates introduced into the glass bath, the redox, the heating mode and the constructive parameters of the furnace.
- the Applicant has sought to produce a soda-lime glass for household or culinary use, which is transparent and has a low SO3 content.
- the daily production of the kiln is equal or close to that of the same oven with higher sulphate content which was not expected.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FRFR2111730 | 2021-11-04 | ||
FR2111730A FR3128707A1 (fr) | 2021-11-04 | 2021-11-04 | Composition de verre sodo-calcique incolore |
Publications (1)
Publication Number | Publication Date |
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WO2023079034A1 true WO2023079034A1 (fr) | 2023-05-11 |
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PCT/EP2022/080738 WO2023079034A1 (fr) | 2021-11-04 | 2022-11-03 | Composition de verre sodo-calcique incolore |
Country Status (3)
Country | Link |
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AR (1) | AR127572A1 (fr) |
FR (1) | FR3128707A1 (fr) |
WO (1) | WO2023079034A1 (fr) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007238398A (ja) * | 2006-03-10 | 2007-09-20 | Nippon Sheet Glass Co Ltd | ソーダ石灰系ガラス組成物 |
WO2010023419A1 (fr) * | 2008-09-01 | 2010-03-04 | Saint-Gobain Glass France | Procede d'obtention de verre et verre obtenu |
WO2010114588A1 (fr) * | 2009-04-03 | 2010-10-07 | Guardian Industries Corp. | Verre à grande transmission et faible teneur en fer avec de l'oxyde de bore pour des optiques, une durabilité et un raffinage améliorés, et procédé associé |
FR2982256A1 (fr) * | 2011-11-03 | 2013-05-10 | Saint Gobain | Substrat pour cellule photovoltaique |
CN103842307A (zh) * | 2011-09-28 | 2014-06-04 | 旭硝子株式会社 | 带透明导电膜的玻璃板及透明导电膜形成用玻璃板 |
WO2016135084A1 (fr) | 2015-02-23 | 2016-09-01 | Umicore Ag & Co.Kg | Dispositif d'agitation de verre fondu |
-
2021
- 2021-11-04 FR FR2111730A patent/FR3128707A1/fr active Pending
-
2022
- 2022-11-03 WO PCT/EP2022/080738 patent/WO2023079034A1/fr active Application Filing
- 2022-11-03 AR ARP220103023A patent/AR127572A1/es unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007238398A (ja) * | 2006-03-10 | 2007-09-20 | Nippon Sheet Glass Co Ltd | ソーダ石灰系ガラス組成物 |
WO2010023419A1 (fr) * | 2008-09-01 | 2010-03-04 | Saint-Gobain Glass France | Procede d'obtention de verre et verre obtenu |
WO2010114588A1 (fr) * | 2009-04-03 | 2010-10-07 | Guardian Industries Corp. | Verre à grande transmission et faible teneur en fer avec de l'oxyde de bore pour des optiques, une durabilité et un raffinage améliorés, et procédé associé |
CN103842307A (zh) * | 2011-09-28 | 2014-06-04 | 旭硝子株式会社 | 带透明导电膜的玻璃板及透明导电膜形成用玻璃板 |
FR2982256A1 (fr) * | 2011-11-03 | 2013-05-10 | Saint Gobain | Substrat pour cellule photovoltaique |
WO2016135084A1 (fr) | 2015-02-23 | 2016-09-01 | Umicore Ag & Co.Kg | Dispositif d'agitation de verre fondu |
Non-Patent Citations (2)
Title |
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"Elaboration du verre (fusion et affinage) - Etude bibliographique", SYMPOSIUM DE L'UNION SCIENTIFIQUE CONTINENTALE DU VERRE (BELGIQUE) - MADRID, 11 October 1973 (1973-10-11) |
ROBERT H. DOREMUS: "Glass - Science and Technology", vol. 2, WILEY-INTERSCIENCE PUBLICATION JOHN WILEY & SONS INC, article "Processing I" |
Also Published As
Publication number | Publication date |
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FR3128707A1 (fr) | 2023-05-05 |
AR127572A1 (es) | 2024-02-07 |
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