WO2008095204A1 - Process for manufacturing glass and frit - Google Patents
Process for manufacturing glass and frit Download PDFInfo
- Publication number
- WO2008095204A1 WO2008095204A1 PCT/VN2008/000001 VN2008000001W WO2008095204A1 WO 2008095204 A1 WO2008095204 A1 WO 2008095204A1 VN 2008000001 W VN2008000001 W VN 2008000001W WO 2008095204 A1 WO2008095204 A1 WO 2008095204A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mixture
- furnace
- mixing
- homogeneous
- sending
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B1/00—Preparing the batches
-
- 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
Definitions
- the present invention relates to a process for manufacturing glass and frit.
- Frit is a compound which has chemical compositions similar to those of glass. It is a homogeneous mixture of inorganic materials being melted at high temperature, followed by suddenly cooling, usually by cold water, the obtained product is called as frit. Frit is often used as glaze for coating on ceramics.
- the conventional process for manufacturing glass and frit consists of steps as follows: a) preparing raw material: the treated natural minerals together with other chemicals are batch-weighed according to determined proportion (the proportion varies to a each certain kind of frit or glass), b) mixing: after being batch-weighed, the mixture of these materials are sent to a mixer to be closely mixed in order to constitute a homogeneous mixture, c) fusing: the homogenised mixture is fired in a furnace at a high temperature (about 1500 0 C), in this furnace the mixture is melted and dispersed into an almost homogeneous mass; then if for manufacture of glass, the mixture is sent to forming step (for example, forming slab, blowing into bottle and so on), or if for manufacture of frit, the mixture is suddenly cooled by pouring into cold water.
- the drawback of this conventional process is that the inorganic materials in the mixture after mixing can be of large size or not uniform which results in longer melting time and some difficulty in the dispersion of these inorganic materials in each others.
- the residence time of the mixture in the furnace must be prolonged, the structure of the furnace must be more complicated to create convection currents in the liquid mass for enhancement of the homogenising process, thus consumes much more energy and cost.
- the purpose of the invention is to overcome the drawbacks of the above- mentioned glass or frit manufacturing process.
- the inventors propose the methods to overcome the above-mentioned disadvantages based on two main factors affecting the melting speed and the dispersing possibility of the raw materials: the fineness of material particles and the homogeneousness of the inorganic materials.
- the finer the materials are the faster the materials are melted and dispersed.
- the more homogeneousness the materials are the shorter the time needed for the homogenising the liquid mass is. This is the reason why the inventors propose a improvement of the conventional process for manufacturing glass and frit by supplementing a grinding step for the raw materials obtained after mixing before sending it to the fusing furnace. This grinding step helps producing the material mixture of higher fineness and greater homogeneousness.
- the invention therefore relates a process for manufacturing glass which comprises the following steps:
- this process further comprises a step for grinding the mixture obtained after mixing and before sending the mixture to the furnace.
- the invention relates a process for manufacturing frit which comprises the following steps:
- this process further comprises a step for grinding the mixture obtained after mixing and before sending the mixture to the furnace.
- This supplementary grinding step can be carried out by means of grinding apparatuses, based on such methods as dry grinding, intermittent grinding, continuous grinding and so on. All grinding apparatuses that can meet the following requirements can be used: they can grind finely, they do not result in harmful impurities, and they can resist chemical corrosion. However, according to preferred embodiments, the invention suggests use of intermittent ball-bearing grinding apparatuses, continuous ball-bearing grinding apparatuses, and continuous vibrating grinding apparatuses in this grinding step. Efficiency of the invention
- the firing time can be reduced in comparison to the firing time of the conventional process, this will result in a decrease in energy cost and an increase in productivity.
- the structure of the furnace can be simpler compared to the one of the furnace used in the conventional process and this also means lower investment cost.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
The invention refers to a process for manufacturing glass or frit which comprises the following steps: - batch-weighing the treated natural minerals together with the other chemicals to the previously determined proportion, - feeding the mixture of these materials to a mixer and mixing to constitute a homogeneous mixture, - sending the homogeneous mixture to a furnace and firing at a high temperature of about 1500°C so that it is melted and dispersed into an almost homogeneous mass. - sending the obtained molten mixture to forming step (to produce glass) or to suddenly cooling step (to produce frit), characterized in that, the process further comprises a step for grinding the mixture obtained after mixing and before sending the mixture to the furnace.
Description
PROCESS FOR MANUFACTURING GLASS AND
FRIT
Field of the invention
The present invention relates to a process for manufacturing glass and frit.
Background of the invention
Frit is a compound which has chemical compositions similar to those of glass. It is a homogeneous mixture of inorganic materials being melted at high temperature, followed by suddenly cooling, usually by cold water, the obtained product is called as frit. Frit is often used as glaze for coating on ceramics.
At present, the conventional process for manufacturing glass and frit consists of steps as follows: a) preparing raw material: the treated natural minerals together with other chemicals are batch-weighed according to determined proportion (the proportion varies to a each certain kind of frit or glass), b) mixing: after being batch-weighed, the mixture of these materials are sent to a mixer to be closely mixed in order to constitute a homogeneous mixture, c) fusing: the homogenised mixture is fired in a furnace at a high temperature (about 15000C), in this furnace the mixture is melted and dispersed into an almost homogeneous mass; then if for manufacture of glass, the mixture is sent to forming step (for example, forming slab, blowing into bottle and so on), or if for manufacture of frit, the mixture is suddenly cooled by pouring into cold water.
The drawback of this conventional process is that the inorganic materials in the mixture after mixing can be of large size or not uniform which results in longer melting time and some difficulty in the dispersion of these inorganic materials in
each others. As a consequence, the residence time of the mixture in the furnace must be prolonged, the structure of the furnace must be more complicated to create convection currents in the liquid mass for enhancement of the homogenising process, thus consumes much more energy and cost.
Summary of the invention
The purpose of the invention is to overcome the drawbacks of the above- mentioned glass or frit manufacturing process.
The inventors propose the methods to overcome the above-mentioned disadvantages based on two main factors affecting the melting speed and the dispersing possibility of the raw materials: the fineness of material particles and the homogeneousness of the inorganic materials. The finer the materials are, the faster the materials are melted and dispersed. Also, the more homogeneousness the materials are, the shorter the time needed for the homogenising the liquid mass is. This is the reason why the inventors propose a improvement of the conventional process for manufacturing glass and frit by supplementing a grinding step for the raw materials obtained after mixing before sending it to the fusing furnace. This grinding step helps producing the material mixture of higher fineness and greater homogeneousness.
The invention therefore relates a process for manufacturing glass which comprises the following steps:
- batch-weighing the treated natural minerals together with the other chemicals to the previously determined proportion,
- feeding the mixture of these materials to a mixer and mixing to constitute a homogeneous mixture,
- sending the homogeneous mixture to a furnace and firing at a high temperature of about 15000C so that it is melted and dispersed into an almost homogeneous mass,
- sending the obtained molten mixture to forming step in order to form the desired shapes, characterized in that, this process further comprises a step for grinding the mixture obtained after mixing and before sending the mixture to the furnace.
Similarly, the invention relates a process for manufacturing frit which comprises the following steps:
- batch-weighing the treated natural minerals together with the other chemicals to the previously determined proportion,
- feeding the mixture of these materials to a mixer and mixing to constitute a homogeneous mixture,
- sending the homogeneous mixture to a furnace and firing at a high temperature of about 15000C so that it is melted and dispersed into an almost homogeneous mass,
- cooling suddenly the obtained molten mixture by pouring into cold water, characterized in that, this process further comprises a step for grinding the mixture obtained after mixing and before sending the mixture to the furnace.
This supplementary grinding step can be carried out by means of grinding apparatuses, based on such methods as dry grinding, intermittent grinding, continuous grinding and so on. All grinding apparatuses that can meet the following requirements can be used: they can grind finely, they do not result in harmful impurities, and they can resist chemical corrosion. However, according to preferred embodiments, the invention suggests use of intermittent ball-bearing grinding apparatuses, continuous ball-bearing grinding apparatuses, and continuous vibrating grinding apparatuses in this grinding step.
Efficiency of the invention
Owing to the supplementary grinding step according to the invention, the firing time can be reduced in comparison to the firing time of the conventional process, this will result in a decrease in energy cost and an increase in productivity. Besides, thanks to this supplementary grinding step also, the structure of the furnace can be simpler compared to the one of the furnace used in the conventional process and this also means lower investment cost.
Claims
1. A process for manufacturing glass comprises the following steps:
- batch-weighing the treated natural minerals together with the other chemicals to the previously determined proportion,
- feeding the mixture of these materials to a mixer and mixing to constitute a homogeneous mixture,
- sending the homogeneous mixture to a furnace and firing at a high temperature of about 15000C so that it is melted and dispersed into an almost homogeneous mass,
- sending the obtained molten mixture to forming step in order to form the desired shapes, characterized in that, this process further comprises a step for grinding the mixture obtained after mixing and before sending the mixture to the furnace.
2. A process for manufacturing frit comprises the following steps:
- batch-weighing the treated natural minerals together with the other chemicals to the previously determined proportion,
- feeding the mixture of these materials to a mixer and mixing to constitute a homogeneous mixture,
- sending the homogeneous mixture to a furnace and firing at a high temperature of about 15000C so that it is melted and dispersed into an almost homogeneous mass,
- cooling suddenly the obtained molten mixture by pouring into cold water, characterized in that, this process further comprises a step for grinding the mixture obtained after mixing and before sending the mixture to the furnace.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| VN1-2007-00235 | 2007-01-31 | ||
| VN200700235 | 2007-01-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008095204A1 true WO2008095204A1 (en) | 2008-08-07 |
Family
ID=39674525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/VN2008/000001 WO2008095204A1 (en) | 2007-01-31 | 2008-01-22 | Process for manufacturing glass and frit |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2008095204A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2942150A1 (en) * | 2009-02-18 | 2010-08-20 | Cerlase | PROCESS FOR MELTING AT LEAST ONE MINERAL POWDER MATERIAL |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1158572A (en) * | 1965-03-04 | 1969-07-16 | Nippon Glass Co Ltd | Process for Glassmaking |
| JP2000302453A (en) * | 1999-04-16 | 2000-10-31 | Yoshiyuki Miyahashi | Production of glass waste material-utilizing material |
| KR20060022797A (en) * | 2004-09-08 | 2006-03-13 | 동서산업주식회사 | Composition for glaze having anion emitting function, far infrared ray radiating function, germicidal function and manufacturing method thereof |
-
2008
- 2008-01-22 WO PCT/VN2008/000001 patent/WO2008095204A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1158572A (en) * | 1965-03-04 | 1969-07-16 | Nippon Glass Co Ltd | Process for Glassmaking |
| JP2000302453A (en) * | 1999-04-16 | 2000-10-31 | Yoshiyuki Miyahashi | Production of glass waste material-utilizing material |
| KR20060022797A (en) * | 2004-09-08 | 2006-03-13 | 동서산업주식회사 | Composition for glaze having anion emitting function, far infrared ray radiating function, germicidal function and manufacturing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2942150A1 (en) * | 2009-02-18 | 2010-08-20 | Cerlase | PROCESS FOR MELTING AT LEAST ONE MINERAL POWDER MATERIAL |
| WO2010094885A1 (en) | 2009-02-18 | 2010-08-26 | Cerlase | Method for melting at least one powdered mineral material |
| US8627685B2 (en) | 2009-02-18 | 2014-01-14 | Cerlase | Method for melting at least one powdered mineral material |
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