CA2302247A1 - Raw material composition for soda-lime glass - Google Patents

Raw material composition for soda-lime glass Download PDF

Info

Publication number
CA2302247A1
CA2302247A1 CA002302247A CA2302247A CA2302247A1 CA 2302247 A1 CA2302247 A1 CA 2302247A1 CA 002302247 A CA002302247 A CA 002302247A CA 2302247 A CA2302247 A CA 2302247A CA 2302247 A1 CA2302247 A1 CA 2302247A1
Authority
CA
Canada
Prior art keywords
raw material
glass
soda
glass raw
nis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002302247A
Other languages
French (fr)
Inventor
Chihiro Sakai
Yoshikazu Toshikiyo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Sheet Glass Co Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2302247A1 publication Critical patent/CA2302247A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C1/00Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C1/00Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/004Refining agents

Abstract

A raw material composition for a soda-lime glass which can effectively inhibit the formation of nickel sulfide (NiS) during melting of the material. A
foreign substance of nickel sulfide (NiS) which is present in a soda-lime glass is formed by the reaction, during vitrifying reaction at an elevated temperature, of Ni components contained in a metal particle containing nickel and in stainless steel used in a glass-melting furnace with sulfur (S) components contained in Na2 SO4 used as a material for glass. The inventive raw material composition for a soda-lime glass comprises a small amount of an additive comprising a metal oxide, a metal chloride, a metal sulfate or a metal nitrate. The composition can be used for reducing or completely vanishing the formation of NiS by the reaction of Ni and S during melting.

Description

Description Raw Material Composition for Soda-Lime Glass Technical Field The present invention relates to a raw material composition for soda-lime glass, and more particularly to a raw material composition for soda-lime glass capable of effectively suppressing formation of nickel sulfide (NiS) in a glass base in the course of melting of the glass raw material, to thereby produce a glass product of high quality.
Background Art In a conventional method for producing soda-lime glass, in a step for melting glass raw material at a temperature as high as near 1,500°C in a melting furnace, a nic~Cel (Ni) component contained in stainless steel used for the interior of the melting furnace and Ni-containing metal particles (e.g., stainless steel particles) present in glass raw material as an impurity may be mixed into molten glass, and the Ni component may react with a sulfur (S) component in mirabilite (Na2S04) serving as a glass raw material. As a result, nickel sulfide (NiS) may be present as a fine impurity in a melt-molded glass substrate. The incidence of an NiS impurity in a defective glass product is very low;
i.e., the number of impurities is about one in some 10 tons (t) of glass products. In addition, the impurity has a ' CA 02302247 2000-03-03 spherical particle and the particle size is as small as 0.3 mm or less, and thus detection of the impurity in a production line is very difficult.
In order to process a substrate formed of such soda-lime glass into glass for a building or a toughened glass plate for an automobile, the substrate is heated to the softening point (near 600°C) and quenched, to thereby produce compressive stress in the surface layers of the glass plate.
When nickel sulfide (NiS) is contained as an impurity in toughened glass which is heated and cooled to ambient temperature in a toughening step, a-phase NiS, which is stable at about 350°C or higher, is present in an unstable state. Since a-Phase NiS is unstable at ambient temperature, with passage of time it is transformed into ~-phase NiS, which is stable at ambient temperature. The volume of NiS
increases concomitant with phase transformation. A toughened glass plate contains a tensile stress layer having a thickness which is about 2/3 the overall thickness of the plate, and thus cracks grow rapidly due to an increase in NiS
volume in the tensile stress layer, to thereby cause spontaneous breakage of the glass plate.
In order to prevent such spontaneous breakage of toughened glass, a method for removing a defective product containing an NiS impurity is known (which method is called soaking treatment). In the method, toughened glass which is heated and cooled to ambient temperature in a toughening step is placed in a firing furnace (a soaking furnace) and re-heated and maintained therein for a predetermined period of time, and any unstable a-phase NiS contained in the toughened glass is transformed into ~-phase NiS, which is stable at about 300°C or less, to thereby increase the volume of NiS and compulsorily break the defective glass.
However, in such steps mainly comprising thermal treatment, a long period time and a great amount of thermal energy are used in order to raise temperature, and thus production cost may increase. In addition, such steps raise a serious problem against reduction in production time and enhancement of productivity.
Disclosure of the Invention In order to solve the aforementioned problems involved in conventional techniques, an object of the present invention is to provide a raw material composition for soda-lime glass capable of effectively suppressing formation of nickel sulfide (NiS) in the course of melting of the glass raw material.
Another object of the present invention is to provide a raw material composition of soda-lime glass capable of effectively suppressing formation of NiS in the course of melting of the glass raw material when the material contains, as a coloring component, ferric oxide (Fe203), selenium (Se), cerium (Ce), or other metallic materials in a very small amount.
A nickel sulfide (NiS) impurity in soda-lime glass is formed in a high-temperature vitrification step in which metallic particles containing Ni and an Ni component contained in stainless steel used for a melting furnace, which are mixed into glass raw material, react with a sulfur (S) component in Na2S04 serving as a glass raw material.
When an additive including an oxide, chloride, sulfate, or a nitrate of a metal is added in a very small amount and in advance to glass raw material, formation of NiS by reaction between Ni and S in the course of melting may be suppressed or completely eliminated, for the reasons described below.
When a metal oxide is added in a very small amount to glass raw material, NiS reacts with other metals to form a eutectic compound, and the decomposition temperature decreases. When a chloride, sulfate, or a nitrate of a metal is added in a very small amount to glass raw material, oxidation is promoted, and thus formation of sulfides of Ni becomes difficult. As a result, formation of NiS may be suppressed.
In one embodiment of the present invention, the raw material composition is characterized by comprising a mirabilite(Na2SOa)-containing glass raw material to which an additive containing an oxide, a chloride, a sulfate, or a nitrate of a metal is incorporated.
In another embodiment of the present invention, the raw material composition is characterized by comprising a glass raw material including mirabilite (Na2S04) and, as a coloring component, at least one species selected from the group consisting of ferric oxide (Fe20,), selenium (Se), cerium (Ce), and other metallic materials, wherein the glass raw material further include an additive containing an oxide, a chloride, a sulfate, or a nitrate of a metal.
The aforementioned metal is at least one species selected from the group consisting of tin (Sn), iron (Fe), cobalt (Co), manganese (Mn), lead (Pb), lithium (Li), potassium (K), and sodium (Na). The percentage by weight of the aforementioned additives may he 0.15 or less on the basis of the total weight of the aforementioned glass raw material.
The incidence of an NiS impurity in a defective glass product is about one in some 10 tons (t) of glass products in a float-type melting furnace in practice, and the amount of Ni component contained in glass products is very low; i.e., ppm (0.001 wt.$) or less. Therefore, only a ultra-very small amount of a metal oxide or the like is required to be added to glass raw material for the present invention to exhibit sufficient effects on reduction or complete elimination of formation of nickel sulfide (NiS).
Best Mode for Carrying Out the Invention (Example 1) There was performed a test simulating the case in which nickel (Ni) metal reacts with a sulfur (S) component to thereby form nickel sulfide (NiS) in the course of melting of glass raw material in a float-type melting furnace in practice.
The respective raw materials shown in Table 1 were mixed, to thereby prepare a glass raw material (200 g).
Subsequently, powder of metallic Ni (particle size: 149 hum) was added to the glass raw material in an amount by weight of 0.07 on the basis of the total weight of the material, to thereby prepare Ni-powder-containing glass raw material 1.
TabJ a 1 Raw material Amo u n t used ( g ) Silica sand _ __ _ ~ 92.0 Soda ash 26.5 Dolomite 23.6 Limestone 5.8 Mirabilite 2.0 Carbon 0.1 Cullet 50.0 Total 200.0 Ni-powder-containing glass raw material 1 was placed in an alumina crucible (volume: 250 cc),~and the crucible was pre-heated at 600°C for 30 minutes and placed in an electric furnace maintained at 1,370°C. The temperature was raised to 1,400°C over 10 minutes. The crucible was maintained in the furnace at the temperature for 2.2 hours and removed from the furnace. The thus-heated glass material was cast, to thereby prepare sample glass 1.
Table 2 shows the amount of added Ni powder (wt.$), the maximum particle size of NiS particles (N,m), and the number of NiS particles per glass weight (number/g) in sample glass 1. The number of NiS particles was determined by observation under a stereoscopic microscope.
Table 2 Amount of Maximum particle Number addition size (~.im) (number/g) (wt.~) Sample 1 0.0700 120 1.13 There were prepared five sets of glass raw material having the same composition as glass raw material 1 used for preparing sample glass 1 in which NiS was formed.
Tin oxide (Sn02), an oxide of tin (Sn), was added to one of the above five sets of glass raw material, to thereby prepare glass raw material containing Ni metal powder and SnOz; i.e., glass raw material 2.
In the same manner, iron oxide (Fe203), an oxide of iron (Fe), was added to one of the above five sets of glass raw material, to thereby prepare glass raw material containing Ni metal powder and Fe203; i.e., glass raw material 3.
In the same manner, cobalt oxide~(Co0), an oxide of cobalt (Co), was added to one of the above five sets of glass raw material, to thereby prepare glass raw material containing Ni metal powder and CoO; i.e., glass raw material 4.
In the same manner, manganese oxide (Mn0), an oxide of manganese (Mn), was added to one of the above five sets of glass raw material, to thereby prepare glass raw material containing Ni metal powder and MnO; i.e., glass raw material 5.
In the same manner, lead oxide (Pb0), an oxide of lead (Pb), was added to one of the above five sets of glass raw material, to thereby prepare glass raw material containing Ni metal powder and PbO; i.e., glass raw material 6.
Each of these glass raw materials 2 to 6 was placed in an alumina crucible, and the crucible was placed in an electric furnace, heated, and maintained in the furnace.
Thereafter, the crucible was removed from the furnace. The thus-heated glass materials were cast, to thereby obtain sample classes 2 to 6. Table 3 shows the amount of added additives (wt.~), the maximum particle size of NiS particles (~.im), and the number of NiS particles per glass weight (number/g) in the respective sample glasses.
Table 3 Additive Amount of Maximum Number addition particle size (number/g) (wt.~) (~) Sample 2 Sn02 0.1500 200 0.52 Sample 3 Fe203 0.1500 ~ 120 0.50 Sample 4 Co0 0.1500 - 0.00 Sam le 5 Mn0 0.1500 200 _ 0.47 Sample 6 Pb0 0.1500 200 0.67 As is apparent from Table 3, when a metal oxide is added in a very small amount to the glass raw material, formation of NiS in a glass product is effectively suppressed.
(Example 2) There were prepared three sets of glass raw material having the same composition as glass raw material 1 used for preparing sample glass 1 in which NiS was formed.
Subsequently, sodium nitrate (NaNO,), a nitrate of sodium (Na), was added to one of the above three sets of glass raw material, in an amount of 50% on the basis of the total amount of NaN03 and mirabilite (NazS04) in the glass raw material, to thereby prepare glass raw material containing Ni metal powder and NaNO,; i.e., glass raw material 7.
In the same manner, potassium nitrate (KN03), a nitrate of potassium (K), was added to one of the above three sets of glass raw material, in an amount of 50% on the basis of the total amount of KN03 and mirabilite (NaZSOQ) in the glass raw material, to thereby prepare glass raw material containing Ni metal powder and KN03; i.e., glass raw material 8.
In the same manner, lithium nitrate (LiNO,), a nitrate of lithium (Li), was added to one of the above three sets of glass raw material, in an amount of 50% on the basis of the total amount of LiNO, and mirabilite (NaZS04) in the glass raw material, to thereby prepare glass raw material containing Ni metal powder and LiN03; i.e., glass raw material 9.
Each of these glass raw materials 7 to 9 was placed in an alumina crucible, and the crucible was placed in an electric furnace, heated, and maintained in the furnace.
Thereafter, the crucible was removed from the furnace. The thus-heated glass materials were cast, to thereby obtain sample glasses 7 to 9. Table 4 shows the addition condition of metal nitrates, the maximum particle size of NiS particles (E.im), and the number of NiS particles per glass weight (number/g) in the respective sample glasses.
Table 4 Addition condition Maximum particle Number size (~u,m) (number/g) Sample NaNO,:NaZSOa = 1:1 300 0.25 Sample KN03:Na2S0,, - 1:1 400 0.39 Sample LiN03:Na2S04 = 1:1 300 0.20 As is apparent from Table 4, when a metal nitrate is added in a very small amount to the glass raw material, formation of NiS in a glass product is effectively suppressed.
(Example 3) There were prepared seven sets of glass raw material having the same composition as glass raw material 1 used for producing sample glass 1 in which NiS was formed.
Iron (Fe) powder was added to one of the above seven sets of glass raw material, to thereby prepare glass raw material containing Ni metal powder and Fe; i.e., glass raw material 10.
In the same manner, iron oxide (Fe203), an oxide of Fe, was added to one of the above seven sets of glass raw material, to thereby prepare glass raw material containing Ni metal powder and Fe20,; i.e., glass raw material 11.
In the same manner, iron chloride hydrate (FeCl,~6H20), a chloride of Fe, was added to one of the above seven sets of glass raw material, to thereby prepare glass raw material containing Ni metal powder and FeC13~6H20; i.e., glass raw material 12.
In the same manner, iron sulfate hydrate (FeS0a~7H20), a sulfate of Fe, was added to one of the above seven sets of glass raw material, to thereby prepare glass raw material containing Ni metal powder and FeS04~7H2o; i.e., glass raw material 13.
In the same manner, iron nitrate hydrate (Fe(N03)3~9H20), a nitrate of Fe, was added in different amounts (wt.%) to three of the above seven sets of glass raw material, to thereby prepare glass raw materials containing Ni metal powder and Fc(NO,),~9HZ0; i.e., glass raw materials 14 to l6.
Each of these glass raw materials 10 to 16 was placed in an alumina crucible, and the crucible was placed in an electric furnace, heated, and maintained in the furnace.
Thereafter, the crucible was removed from the furnace. The thus-heated glass materials were cast, to thereby obtain sample glasses 10 to 16.
Table 5 shows the additives, the amount of added additives (wt.~), the maximum particle size of NiS particles (~.~m), and the number of NiS particles per glass weight (number/g) in the respective sample glasses.
Table 5 Additive Amount of Maximum Number addition particle (number/g) (wt.~) size (E,im) Sample 10 Fe 0.1500 300 1.70 Sam le 11 Fe 03 0.1500 120 0.50 Sample 12 FeCl3 ~ 6H20 0 . 1500 300 0. 80 Sample 13 FeS04 ~ 7HZ0 0. 1500 120 0. 73 Sample 14 Fe(N0,)3~9H200.1500 50 0.01 Sample 15 Fe(N03)3~9H200.1000 500 0.66 Sample 16 Fe(N0,),~9Hz00.0750 137 1.03 As is apparent from Table 5, when an oxide, chloride, sulfate, or nitrate of Fe is added in a very small amount to the glass raw material, formation of NiS in a glass product is effectively suppressed.
In glass products actually produced in practice, the Ni content of glass is much lower than the value shown in Table 2; i.e., the content is 10 ppm (0.001 wt.~) or less as described above, and therefore, the amount of the additive added to glass raw material is small. As is apparent from the results of the examples, even when the amount of additive is 0.01 wt.~ or less on the basis of the weight of glass raw material, sufficient effects may be obtained.
The above-described examples are applicable to glass raw material having a composition including a coloring component; for example, ferric oxide (Fe20,), selenium (Se), cerium (Ce), or other metallic materials in a very small amount.
Industrial Applicability In the present invention, glass raw material comprises an additive containing an oxide, a chloride, a sulfate, or a nitrate of a metal in a very small amount, and thus formation of nickel sulfide (NiS) by reaction between nickel (Ni) and a sulfur (S) component in molten glass can be suppressed. In addition, the amount of NiS in a glass product can be greatly reduced.
Even when the aforementioned additives are added in very small amounts to a glass plate, physical properties of glass, including color, viscosity, and expansion coefficient, do not change, and the glass plate can maintain its original quality, which is very advantageous in practice.
As described above, in the present invention, a glass product containing substantially no NiS can be produced. In practice, even when additives are added in amounts of 0.01 wt.~ or less to glass raw material, nickel sulfide (NiS) can be ~;ufficiently reduced or eliminated. In addition, the production process for toughened glass does not require a soaking process, and thus production cost for the glass can be reduced.
Furthermore, soda-lime glass can be produced through a method similar to a conventionally-employed one, and thus conventional production equipment can be used as is, and therefore it is not necessary to modify the equipment or to build additional equipment. Therefore, quality of toughened glass can be enhanced and equipment operating cost can be reduced.

Claims (8)

Claims
1. A raw material composition for soda-lime glass, comprising a mirabilite(Na2SO4)-containing glass raw material to which an additive containing an oxide, a chloride, a sulfate, or a nitrate of a metal is incorporated.
2. A raw material composition for soda-lime glass according to claim 1, wherein the metal is at least one species selected from the group consisting of tin (Sn), iron (Fe), cobalt (Co), manganese (Mn), lead (Pb), lithium (Li), potassium (K), and sodium (Na).
3. A raw material composition for soda-lime glass according to claim 2, wherein the percentage by weight of the additive is 0.15% or less on the basis of the total weight of the glass raw material.
4. A raw material composition for soda-lime glass, comprising a mirabilite(Na2SO4)-containing glass raw material to which an additive selected from the group consisting of sodium nitrate (NaNO3), potassium nitrate (KNO3), and lithium nitrate (LiNO3) is incorporated, wherein about 50% of the amount of mirabilite (Na2SO4) contained in the glass raw material is replaced by the additive.
5. A raw material composition for soda-lime glass, comprising a glass raw material including mirabilite (Na2SO4) and, as a coloring component, at least one species selected from the group consisting of ferric oxide (Fe2O3), selenium (Se), cerium (Ce), and other metallic materials, wherein the glass raw material further include an additive containing an oxide, a chloride, a sulfate, or a nitrate of a metal.
6. A raw material composition for soda-lime glass according to claim 5, wherein the metal is at least one species selected from the group consisting of tin (Sn), iron (Fe), cobalt (Co), manganese (Mn), lead (Pb), lithium (Li), potassium (K), and sodium (Na).
7. A raw material composition for soda-lime glass according to claim 6, wherein the percentage by weight of the additive is 0.15 or less on the basis of the total weight of the glass raw material.
8. A raw material composition for soda-lime glass, comprising a glass raw material including mirabilite (Na2SO4) and, as a coloring component, at least one species selected from the group consisting of ferric oxide (Fe2O3), selenium (Se), cerium (Ce), and other metallic materials, wherein the glass raw material further include an additive selected from the group consisting of sodium nitrate (NaNO3), potassium nitrate (KNO3), and lithium nitrate (LiNO3) is incorporated, wherein about 50% of the amount of mirabilite (Na2SO4) contained in the glass raw material is replaced by the additive.
CA002302247A 1998-07-07 1999-07-06 Raw material composition for soda-lime glass Abandoned CA2302247A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP19122198A JP3670489B2 (en) 1998-07-07 1998-07-07 Method for producing soda-lime glass
JP10-191221 1998-07-07
PCT/JP1999/003630 WO2000001631A1 (en) 1998-07-07 1999-07-06 Raw material composition for soda-lime glass

Publications (1)

Publication Number Publication Date
CA2302247A1 true CA2302247A1 (en) 2000-01-13

Family

ID=16270919

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002302247A Abandoned CA2302247A1 (en) 1998-07-07 1999-07-06 Raw material composition for soda-lime glass

Country Status (7)

Country Link
US (1) US6780801B1 (en)
EP (1) EP1029826A4 (en)
JP (1) JP3670489B2 (en)
KR (1) KR100591489B1 (en)
CN (1) CN1171816C (en)
CA (1) CA2302247A1 (en)
WO (1) WO2000001631A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100847618B1 (en) 2001-09-05 2008-07-21 니혼 이타가라스 가부시키가이샤 High transmission glass plates and method for manufacturing the same
JP2009107850A (en) * 2006-02-14 2009-05-21 Nippon Sheet Glass Co Ltd Method for producing glass article
FR3068347B1 (en) * 2017-06-30 2020-08-28 Arc France GLASS MANUFACTURING PREPARATION AND GLASS FURNITURE
CA3088780A1 (en) * 2018-03-07 2019-09-12 Guardian Glass, Llc. Method and system for reducing glass failures from nickel sulfide based inclusions
CN110282873B (en) * 2019-07-05 2021-08-10 齐鲁工业大学 Large bottle and can glass with long material property and preparation method thereof

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296004A (en) * 1963-08-12 1967-01-03 Pittsburgh Plate Glass Co Neutral brown heat absorbing glass composition
US3375095A (en) * 1964-10-09 1968-03-26 Brockway Glass Co Inc Treatment of melting glass with so2
US3589885A (en) * 1969-04-07 1971-06-29 Owens Illinois Inc Glass melting with a refining agent
US3652303A (en) * 1970-01-26 1972-03-28 Ppg Industries Inc Heat absorbing blue soda-lime-silica glass
JPS4929284B1 (en) * 1970-12-18 1974-08-02
JPS49118711A (en) * 1973-03-17 1974-11-13
JPS517006A (en) 1974-07-08 1976-01-21 Central Glass Co Ltd GARASUGENRYOSOSEIBUTSU
US4062689A (en) * 1975-04-11 1977-12-13 Asahi Glass Company Ltd. Glass composition which is resistant to alkali
US4270945A (en) * 1979-12-03 1981-06-02 Ppg Industries, Inc. Method of melting flat glass using nitrates to suppress sulfurous emissions
US4792536A (en) * 1987-06-29 1988-12-20 Ppg Industries, Inc. Transparent infrared absorbing glass and method of making
US5112778A (en) * 1990-01-30 1992-05-12 Libbey-Owens-Ford Co. Batch composition for making infrared and ultraviolet radiation absorbing green glass
MX9403013A (en) * 1993-04-27 1995-01-31 Libbey Owens Ford Co GLASS COMPOSITION.
US5401287A (en) 1993-08-19 1995-03-28 Ppg Industries, Inc. Reduction of nickel sulfide stones in a glass melting operation
US5436206A (en) * 1994-06-10 1995-07-25 Corning Incorporated Champagne colored glasses
JP3040708B2 (en) 1995-10-19 2000-05-15 日本板硝子株式会社 Method for producing soda-lime glass
US5725628A (en) * 1996-08-05 1998-03-10 Ford Motor Company Reduction of nickel sulfide stones in glass
JPH10265239A (en) * 1997-03-26 1998-10-06 Nippon Sheet Glass Co Ltd Ultraviolet ray and infrared ray absorption glass
JP4086211B2 (en) * 1998-04-17 2008-05-14 Hoya株式会社 Glass composition and method for producing the same

Also Published As

Publication number Publication date
EP1029826A4 (en) 2003-06-18
JP2000026134A (en) 2000-01-25
CN1171816C (en) 2004-10-20
JP3670489B2 (en) 2005-07-13
WO2000001631A1 (en) 2000-01-13
US6780801B1 (en) 2004-08-24
KR20010023714A (en) 2001-03-26
KR100591489B1 (en) 2006-06-20
CN1273570A (en) 2000-11-15
EP1029826A1 (en) 2000-08-23

Similar Documents

Publication Publication Date Title
CA2129086C (en) Reduction of nickel sulfide stones in a glass melting operation
TWI585059B (en) Chemically temperable glass sheet
EP3074355B1 (en) Soda-lime glass from 100% recycled glass-forming materials
EP2986574A1 (en) Low iron, high redox ratio, and high iron, high redox ratio, soda-lime-silica glasses and methods of making same
WO2004050574A1 (en) Glass composition including sulfides having low visible and ir transmission
CN115286251A (en) Tempered glass, microcrystalline glass and preparation method and application thereof
EP1989152A2 (en) Method of making glass including use of boron oxide for reducing glass refiting time
CA2302247A1 (en) Raw material composition for soda-lime glass
JPH08245237A (en) Composition for antibacterial glass
WO1999029634A1 (en) Nitrate/nitrite-free manufacturing of glass with selenium
WO1996007621A1 (en) Volatile glass batch materials incorporated in frits
CN110590170A (en) Fly ash-based inorganic fiber and preparation method thereof
JP3040708B2 (en) Method for producing soda-lime glass
DE2506804A1 (en) METHOD OF MANUFACTURING FLAT GLASS
CN112592053A (en) Novel environment-friendly glass suitable for glass bottle and can production and preparation process thereof
JPH06219771A (en) Composition for antibacterial glass
JP2007217200A (en) Method for producing glass article
DE4401657C2 (en) Glasscycling compatible pigments and their use
CN116835881A (en) Method for preparing lime-iron garnet-based glass ceramic by utilizing iron-carbon-sulfur waste residues
NZ719723B2 (en) Soda-lime glass from 100% recycled glass-forming materials
JP2009107850A (en) Method for producing glass article
JPH04170340A (en) Production of rough glass stone for artistic handicraft

Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued