JP2000086256A - Open pore type porous glass sintered body and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an open pore type porous glass sintered body having a specified apparent porosity, a specified bulk specific gravity and a specified bending strength by sintering granules obtained by crushing recovered glass articles by way of an inorganic binder. SOLUTION: The sintered body has 25-40% apparent porosity, a bulk specific gravity of 1.0-1.3 and 50-100 kgf/cm2 bending strength. A mixture of 100 pts.wt. granules obtained by crushing and 3-8 pts.wt. inorganic binder is press-molded in a mold, dried in the mold and fired at 600-800 deg.C to obtain the sintered body useful as a material for civil engineering and construction and for apparatus industry through simple producing steps as a recycled prodgct of waste at a low cost. The inorganic binder is preferably water glass and the grain size of the granules is preferably 8-200 mesh. Glass bottles 1 classified according to color are crushed to obtain glass granules 3, the granules 3 are sieved and the sieved glass granules 5 are mixed with an inorganic binder 6. The mixture is filled into a mold 9 and press-molded with a press 10, the resultant molding 11 is dried by heating and the solidified molding 13 is fired in a firing furnace 14. The resultant sintered body has high strength and high gas permeability and can be used at 500-600 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous porous glass sintered body whose main raw material is obtained by crushing and granulating recovered glass products as general waste. And a method for producing the same.

[0002]

2. Description of the Related Art Colored glass products among recovered glass products are difficult to regenerate, and there has been a demand for effective use of such products by recovery processing organizations.

[0003]

Means for Solving the Problems The present inventor should solve the above-mentioned problems. As a result of intensive studies, the recovered glass bottles were crushed and sieved to obtain crushed granules to obtain an apparent porosity of 30 to 40%.
Casa specific gravity 1.0-13, bending strength 50-100kgf /
It succeeded in producing a communicating porous glass sintered body having physical properties of cm ² .

That is, the present invention is as follows. (1) A communicating porous glass sintered body characterized in that the material is made of a sintered body of ground particles of recovered glass products. (2) A communicating porous glass sintered body characterized in that ground particles of recovered glass products are sintered via an inorganic binder. (3) A connected porous glass sintered body characterized in that 3 to 8 parts by weight of an inorganic binder is added to 100 parts by weight of the ground particles of recovered glass product, mixed, and sintered. (4) Physical properties of the connected porous glass sintered body are apparent porosity of 30 to 40%, bulk specific gravity of 1.0 to 1.3, and bending strength of 5
Communicating porous glass sintered body according to any of claims 1, characterized in that a 0~100kgf / cm ² 3. (5) An interconnected porous material characterized by adding a binder to the pulverized recovered glass bottle, mixing the mixture into a mold, filling the mold, pressing, drying in a mold, taking out and firing at 600 to 800 ° C. A method for manufacturing a glass sintered body. (6) 3 to 8 parts by weight of a heavy equipment binder is added to and mixed with 100 parts by weight of the recovered glass pin pulverized particles, and the mixture is filled in a mold, pressed, dried in a mold, and taken out.
A method for producing a communicating porous glass sintered body, characterized by firing at a temperature of ℃. (7) The method for producing a continuous porous glass sintered body according to claim 5 or 6, wherein the particle size of the collected glass bottle pulverized particles is 8 to 200 mesh. (8) The method according to claim 5 or 6, wherein the inorganic binder is water glass. (9) An inorganic binder having a size of 200 mesh or less of the crushed particles of the recovered glass bottle per 100 parts by weight of the water glass 100
The method for producing a continuous porous glass sintered body according to claim 5, comprising a slurry-like liquid obtained by adding and mixing 150 to 150 parts by weight. (10) The communication according to (5) or (6), wherein the crushed particles of the recovered glass bottle are divided into, for example, 8 to 20 mesh, 20 to 30 mesh, and the like, and one or two or more of these are mixed. A method for producing a porous glass sintered body. (11) The recovered glass bottle pulverized particles are divided into, for example, 8 to 20 mesh, 20 to 30 mesh, and the like. A method for producing a continuous porous glass sintered body, comprising laminating and filling a mold, drying in a mold after pressure molding, and taking out and firing at 600 to 800 ° C. (12) The communicating porous glass sintered body according to (10) or (11), wherein the pulverized particles of the recovered glass bottle are sorted for each color, and one kind or a mixture of two or more kinds thereof is used.

The glass particles used as the main raw material in the present invention are obtained by pulverizing a recovered glass bottle which is a general industrial product. In particular, those that cannot be recycled as bins, such as colored bottles, have a great problem of being reused in collection and disposal facilities and the like.

The crushed and sieved glass particles are sintered in a point contact state via an inorganic binder, and thus become porous. The opening diameter can be adjusted by changing the particle size of the glass particles. Things. Furthermore, since water glass is used as the inorganic binder, the handling is simple and the cost is low. No harmful gas is generated during firing.

[0008] In the present invention, 200 in water glass
By using a slurry obtained by mixing glass particles having a mesh size or less as the inorganic binder, the crushed material of the recovered glass bottle can be almost reused. In addition, the bonding force due to sintering is increased, and it is possible to manufacture a continuous porous glass sintered body having high strength.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described based on a manufacturing process of a communicating porous glass sintered body shown in FIG. The labels, stoppers, caps, etc. of the collected glass bottles are removed, and the inside and outside are washed with water and dried. (Not shown)
Glass bottles 1 classified by color are crushed by crusher 2,
Glass particles 3 are obtained. Next, 3 to 8 parts by weight of the inorganic binder 6 is added to the glass particles 5 sieved by the vibrating sieve 4 with respect to 100 parts by weight of, for example, 20 to 30 mesh glass particles, and sufficiently mixed by the mixer 7. A mixture 8 is obtained. The mixture 8 is filled in a mold 9 and pressed by a press forming machine 10 to obtain a press-formed body 11. The press-formed body 11 is heated and dried at a temperature of 100 to 200 ° C. in a dryer 12 together with the mold 9 to obtain a solidified formed body 13. Thereafter, the solidified molded body 13 is taken out of the mold 9 and heated and fired at a temperature of 600 to 800 ° C. in a firing furnace 14 to obtain a continuous porous glass sintered body 15 having high strength and high air permeability.

Next, an embodiment of the production of the communicating porous glass sintered body according to the present invention will be described. Example 1: Glass particles 10 sieved to 20-30 mesh
5 parts by weight of water glass diluted to a specific gravity of 35 to 40 pomes with respect to 0 parts by weight was added and mixed. The mixture was filled in a mold, and then subjected to pressure molding by a pressure molding machine. After drying the molded body together with the mold at 100 ° C., the solidified molded body was taken out from the mold and heated and fired at 800 ° C. The coupled porous glass sintered body thus produced has a bulk specific gravity of 1.2 to 1.
3 g / cm ³ , apparent porosity was 40% or more, and flexural strength was 50 kgf / cm ² or more.

Example 2: 100 parts by weight of glass particles sieved to 20 to 30 mesh, 5 parts by weight of water glass diluted to a specific gravity of 35 to 40 poem 2 parts by weight of glass particles sieved to 200 mesh or less Then, the slurry was added and mixed, the mixture was filled in a mold, and then subjected to pressure molding by a pressure molding machine. After drying the molded body together with the mold at 100 ° C., the solidified molded body was taken out of the mold and heated and fired at 800 ° C. The communicating porous glass sintered body thus manufactured has a bulk specific gravity of 1.3 to 1.4 g / cm ³ and an apparent porosity of 35.
% Or more, and the bending strength was 70 kgf / cm ² or more.

Example 3: 7 parts by weight of water glass diluted to a specific gravity of 35 to 40 pomes were added to 100 parts by weight of glass particles sieved to 100 to 200 mesh, and the mixture was filled in a mold. Pressure molding was performed with a pressure molding machine. After drying the molded body together with the mold at 100 ° C., the solidified molded body was taken out from the mold and heated and fired at 700 ° C. The porous sintered glass sintered body thus manufactured had a bulk specific gravity of 1.1 to 1.2 g / cm ³ , an apparent porosity of 25% or more, and a bending strength of 65 kgf / cm ² or more. Although the embodiment has been described above with reference to the glass bottle, it goes without saying that the present invention can be applied to glass products other than the glass bottle, for example, a glass plate and the like.

[0013]

According to the present invention described above, the communicating porous glass sintered body exhibits the following excellent functions and effects. Glass or ceramic continuous porous sintered bodies produced by sintering at a low temperature of 600 to 800 ° C. have not been commercialized. It uses water glass, an inorganic binder that is easy and inexpensive to handle, and because it is inorganic, no toxic gas is generated during firing. The pore size of the communicating porous sintered body can be adjusted by changing the particle size of the glass particles. By mixing one or more of the glass particles classified by color, a continuous porous glass sintered body having various colors can be produced without using other coloring materials. Since the manufacturing process is very simple, it can be reduced in cost as a recycled product of waste. Moreover, since it requires little technical knowledge and technology related to glass, it is easy to commercialize. Most of the glass particles obtained by crushing the recovered glass bottle can be recycled. It can be used in a high-temperature atmosphere of about 500 to 600 ° C, and is used as a material for civil engineering and construction, in addition to an outer wall material, a sound absorbing material, a water-permeable block material, etc. Can be considered. In particular, it greatly contributes to recycling of glass bottles that cannot be regenerated as bottles.

[0014]

[Brief description of the drawings]

FIG. 1 is a manufacturing process of a communicating porous glass sintered body according to an embodiment of the present invention.

[Explanation of symbols]

 1: recovered glass bottle 2: crusher 3: crushed glass particle 4: vibrating sieve 5: sieved glass particle 6: inorganic binder 7: mixer 8: mixture 9: mold 10: pressing machine 11: pressing Molded body 12: Dryer 13: Solidified molded body 14: Firing furnace 15: Sintered porous glass sintered body

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[Procedure amendment]

[Submission Date] September 26, 1998 (1998.9.2)
6)

[Procedure amendment 1]

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[Correction target item name] Full text

[Correction method] Change

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[Document Name] Statement

Patent application title: Sintered porous glass sintered body and method for producing the same

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous porous glass sintered body whose main raw material is obtained by crushing and granulating recovered glass products as general waste. And a method for producing the same.

[0002]

2. Description of the Related Art Colored glass products among recovered glass products are difficult to regenerate, and there has been a demand for effective use of such products by recovery processing organizations.

[0003]

Means for Solving the Problems The inventor of the present invention has made intensive studies to solve the above-mentioned problems, and as a result, obtained a crushed recovered glass bottle and obtained sieved particles to obtain an apparent porosity of 25 to 40.
%, Bulk specific gravity 1.0-1.3, bending strength 50-100k
It succeeded in producing a continuous porous glass sintered body having physical properties of gf / cm ² .

That is, the present invention is as follows. (1) A communicating porous glass sintered body characterized in that the material is made of a sintered body of ground particles of recovered glass products. (2) A communicating porous glass sintered body, wherein the ground particles of the recovered glass product are sintered via an inorganic binder. (3) A communicating porous glass sintered body characterized in that 3 to 8 parts by weight of an inorganic binder is added to 100 parts by weight of the crushed particles of the recovered glass product, mixed and sintered. (4) The physical properties of the communicating porous glass sintered body are apparent porosity 25-40%, bulk specific gravity 1.0-1.3, and bending strength 5
0~100kgf / cm claims 1, characterized in that ² is to communicate porous glass sintered body according to any one of 3.

(5) An inorganic binder is added to the crushed particles of the recovered glass product, mixed, filled in a mold, dried in a mold after pressure molding, taken out, and fired at 600 to 800 ° C. A method for producing a communicating porous glass sintered body. (6) 3 to 8 parts by weight of an inorganic binder is added to and mixed with 100 parts by weight of the crushed particles of the recovered glass product, and the mixture is filled in a mold, pressed, dried in a mold, and taken out.
A method for producing a communicating porous glass sintered body, characterized by firing at a temperature of ℃. (7) The method for producing a communicating porous glass sintered body according to claim 5 or 6, wherein the particle size of the ground particles of the recovered glass product is 8 to 200 mesh. (8) The method according to claim 5 or 6, wherein the inorganic binder is water glass. (9) 100 to 100 parts by weight of the inorganic glass binder is 200 mesh or less of the recovered glass product pulverized particles per 100 parts by weight of water glass
The method for producing a continuous porous glass sintered body according to claim 5, comprising a slurry-like liquid to which 50 parts by weight is added and mixed. (10) The recovered glass product pulverized particles are divided into, for example, 8 to 20 mesh, 20 to 30 mesh, or the like, and one or more sections are mixed or laminated. A method for producing the communicating porous glass sintered body according to the above. (11) The method for producing a continuous porous glass sintered body according to (10), wherein the pulverized particles of the recovered glass product are separated for each color, and one kind or a mixture of two or more kinds is obtained.

In the present invention, the glass particles used as a main raw material are obtained by pulverizing recovered glass products, which are general waste. In particular, those that cannot be recycled as bins, such as colored bottles, have a great problem of being reused in collection and disposal facilities and the like.

[0007] The crushed and sieved glass particles are sintered in a point contact state via an inorganic binder, so that they become porous, and the opening diameter is adjusted by changing the particle size of the glass particles. You can do it. Further, since water glass is used as the inorganic binder, the handling is simple and the cost is low. No harmful gas is generated during firing.

[0008] In the present invention, 200 in water glass
By using a slurry obtained by mixing glass particles having a size equal to or smaller than the mesh as an inorganic binder, most of the crushed collected glass products can be reused. In addition, the bonding force due to sintering is increased, and it is possible to manufacture a continuous porous glass sintered body having high strength.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described based on a manufacturing process of a communicating porous glass sintered body shown in FIG. The labels, stoppers, caps, etc. of the collected glass bottles are removed, and the inside and outside are washed with water and dried. (Not shown) Next, the glass bottles 1 classified by color are pulverized by a pulverizer 2 to obtain glass particles 3. Next, the glass particles 5 sieved by the vibrating sieve 4 are replaced with glass particles 10 of, for example, 20 to 30 mesh.
A mixture 8 is obtained by adding 3 to 8 parts by weight of the inorganic binder 6 to 0 parts by weight and sufficiently mixing with the mixer 7. This mixture 8
Into a mold 9 and pressurized by a press forming machine 10 to obtain a press-formed body 11. The press-formed body 11 is heated and dried at a temperature of 100 to 200 ° C. in a dryer 12 together with the mold 9 to obtain a solidified formed body 13. Then, the solidified compact 13 is taken out of the mold 9 and the firing furnace 1
By heating and baking at a temperature of 600 to 800 ° C. in step 4, a continuous porous glass sintered body 15 having high strength and high air permeability is obtained.

Next, an embodiment of the production of the communicating porous glass sintered body according to the present invention will be described. Example 1: Glass particles 10 sieved to 20-30 mesh
5 parts by weight of water glass whose specific gravity was diluted to 35 to 40 Baume degrees with respect to 0 parts by weight was added and mixed. After filling the mixture into a mold, the mixture was pressure-formed at 5 kgf / cm ² by a pressure-forming machine.
After drying the molded body together with the mold at 100 ° C., the solidified molded body was taken out from the mold and heated and fired at 800 ° C. The communicating porous glass sintered body thus manufactured had a bulk specific gravity of 1.1 to 1.2, an apparent porosity of 40% or more, and a bending strength of 50 kgf / cm ² or more.

Example 2: 5 parts by weight of glass particles sieved to 200 mesh or less in 5 parts by weight of water glass diluted to a specific gravity of 35 to 40 Baume per 100 parts by weight of glass particles sieved to 20 to 30 mesh Then, a slurry was added and mixed, and the mixture was filled in a mold, followed by pressure molding with a pressure molding machine at 5 kgf / cm ² . After drying the molded body together with the mold at 100 ° C., the solidified molded body was taken out from the mold and heated and fired at 800 ° C. The sintered porous glass sintered body thus manufactured has a bulk specific gravity of 1.1 to 1.1.
1.2, apparent porosity is 35% or more, bending strength is 70k
gf / cm ² or more.

Example 3 7 parts by weight of water glass diluted to a specific gravity of 35 to 40 Baume were added to 100 parts by weight of glass particles sieved to 100 to 200 mesh, and the mixture was filled in a mold. Pressure molding was performed with a pressure molding machine at 10 kgf / cm ² . After drying the molded body together with the mold at 100 ° C, the solidified molded body was taken out of the mold and heated and fired at 700 ° C. The porous sintered glass sintered body thus produced had a bulk specific gravity of 1.2 to 1.3, an apparent porosity of 25% or more, and a bending strength of 80 kgf / cm ² or more.

[0013]

According to the present invention described above, the communicating porous glass sintered body exhibits the following excellent functions and effects. Glass or ceramic continuous porous sintered bodies produced by sintering at a low temperature of 600 to 800 ° C. have not been commercialized. It uses water glass, an inorganic binder that is easy and inexpensive to handle, and because it is inorganic, no harmful gas is generated during firing. The pore size of the communicating porous sintered body can be adjusted by changing the particle size of the glass particles. By mixing one or more of the glass particles classified by color, a continuous porous glass sintered body having various colors can be produced without using other coloring materials. Since the manufacturing process is very simple, the cost can be reduced as a recycled product of waste. Moreover, since it requires little technical knowledge and technology related to glass, it is easy to commercialize. Most of the glass particles obtained by grinding the recovered glass products can be recycled. It can be used in a high-temperature atmosphere of about 500 to 600 ° C., and is used for materials such as outer wall materials, sound absorbing materials, and water-permeable block materials as civil engineering and building materials, as well as members used in the equipment industry, such as filters and absorption plates. Conceivable. In particular, it greatly contributes to recycling of glass bottles that cannot be regenerated as bottles.

[0014]

[Brief description of the drawings]

FIG. 1 is a manufacturing process of a communicating porous glass sintered body according to an embodiment of the present invention.

[Explanation of Signs] 1: Recovered glass bottle 2: crusher 3: crushed glass particle 4: vibrating screen 5: sieved glass particle 6: inorganic binder 7: mixer 8: mixture 9: mold 10: pressure molding Machine 11: Press molded body 12: Dryer 13: Solidified molded body 14: Firing furnace 15: Sintered porous glass sintered body

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[Procedure amendment]

[Submission date] November 6, 1998 (1998.11.
6)

[Procedure amendment 1]

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[Correction method] Oath

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(12) The inorganic binder comprises a slurry liquid obtained by adding and mixing 20 to 40 parts by weight of clay such as kaolinite, halloysite or the like to 100 parts by weight of water glass. A method for producing the communicating porous glass sintered body according to the above.

[Procedure amendment]

[Submission date] March 2, 1999 (1999.3.2)

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(5) An inorganic binder is added to the crushed particles of the recovered glass product, mixed, filled in a mold, dried in a mold after pressure molding, taken out, and fired at 600 to 800 ° C. A method for producing a communicating porous glass sintered body. (6) 3 to 8 parts by weight of an inorganic binder is added to and mixed with 100 parts by weight of the crushed particles of the recovered glass product, and the mixture is filled in a mold, pressed, dried in a mold, and taken out.
A method for producing a communicating porous glass sintered body, characterized by firing at a temperature of ℃. (7) The method for producing a communicating porous glass sintered body according to claim 5 or 6, wherein the particle size of the ground particles of the recovered glass product is 8 to 200 mesh. (8) The method according to claim 5 or 6, wherein the inorganic binder is water glass. (9) 100 to 100 parts by weight of the inorganic glass binder is 200 mesh or less of the recovered glass product pulverized particles per 100 parts by weight of water glass
7. The method for producing a communicating porous glass sintered body according to claim 5, wherein the method comprises a slurry-like liquid to which 50 parts by weight is added and mixed. (10) The recovered glass product pulverized particles are divided into, for example, 8 to 20 mesh, 20 to 30 mesh, or the like, and one or more sections are mixed or laminated. A method for producing the communicating porous glass sintered body according to the above. (11) The method for producing a continuous porous glass sintered body according to (10), wherein the pulverized particles of the recovered glass product are separated for each color, and one kind or a mixture of two or more kinds is obtained. (12) The communication according to (5) or (6), wherein the inorganic binder is a slurry liquid obtained by adding and mixing 20 to 40 parts by weight of clay such as kaolinite, halloysite or the like with respect to 100 parts by weight of water glass. A method for producing a porous glass sintered body.

[Procedure amendment]

[Submission date] May 14, 1999 (1999.5.1
4)

[Procedure amendment 1]

[Document name to be amended] Statement

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[Claims]

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(5) An inorganic binder is added to the crushed particles of the recovered glass product, mixed, filled in a mold, dried in a mold after pressure molding, taken out, and fired at 600 to 800 ° C. A method for producing a communicating porous glass sintered body. (6) 3 to 8 parts by weight of an inorganic binder is added to and mixed with 100 parts by weight of the crushed particles of the recovered glass product, and the mixture is filled in a mold, pressed, dried in a mold, and taken out.
A method for producing a communicating porous glass sintered body, characterized by firing at a temperature of ℃. (7) The method for producing a communicating porous glass sintered body according to claim 5 or 6, wherein the particle size of the ground particles of the recovered glass product is 8 to 200 mesh. (8) The method according to claim 5 or 6, wherein the inorganic binder is water glass. (9) 100 to 100 parts by weight of the inorganic glass binder is 200 mesh or less of the recovered glass product pulverized particles per 100 parts by weight of water glass.
7. The method for producing a communicating porous glass sintered body according to claim 5, wherein the method comprises a slurry-like liquid to which 50 parts by weight is added and mixed. (10) The recovered glass product crushed particles are divided into, for example, 8 to 20 mesh, 20 to 30 mesh, and the like, and one or two or more sections are mixed or laminated. A method for producing the communicating porous glass sintered body according to the above. (11) The method for producing a continuous porous glass sintered body according to claim 10, wherein the recovered glass product crushed particles are separated for each color and are one kind or a mixture of two or more kinds. (12) The communication according to (5) or (6), wherein the inorganic binder is a slurry liquid obtained by adding and mixing 20 to 40 parts by weight of clay such as kaolinite, halloysite or the like with respect to 100 parts by weight of water glass. A method for producing a porous glass sintered body. (13) The communicating porous material according to (5) or (6), wherein the inorganic binder is a slurry-like liquid in which 10 to 20 parts by weight of amorphous silica fine powder is added to and mixed with 100 parts by weight of water glass. A method for manufacturing a glass sintered body. (14) The communicating porous glass according to (5) or (6), wherein the inorganic binder is a slurry-like liquid obtained by adding and mixing 30 to 80 parts by weight of a fine furnace slag powder with respect to 100 parts by weight of water glass. A method for manufacturing a sintered body.

Claims (11)

[Claims] 1. A communicating porous glass sintered body characterized in that the raw material is a sintered body of ground particles of recovered glass products. 2. A communicating porous glass sintered body characterized in that ground particles of recovered glass product are sintered via an inorganic binder. 3. A continuous porous glass sintered body characterized in that 3 to 8 parts by weight of an inorganic binder is added to 100 parts by weight of the crushed particles of the recovered glass product, mixed and sintered. 4. The physical properties of the sintered porous glass have an apparent porosity of 30 to 40%, a bulk specific gravity of 1.0 to 1.3, and a bending strength of 50 to 100 kgf / cm ^2. The communicating porous glass sintered body according to claim 1. 5. A method in which a binder is added to the crushed particles of the recovered glass product, mixed, filled in a mold, dried in a mold after pressure molding, taken out, and fired at 600 to 800 ° C. A method for producing a communicating porous glass sintered body. 6. Addition and mixing of 3 to 8 parts by weight of an inorganic binder with respect to 100 parts by weight of the crushed particles of the recovered glass product, filling the mixture into a mold, press-molding at 5 to 20 kgf / cm ² and drying in the mold And then firing at 600 to 800 ° C. 7. The recovered glass product has a particle size of from 8 to 200.
The method for producing a communicating porous glass sintered body according to claim 5, wherein the method is a mesh. 8. The method for producing a communicating porous glass sintered body according to claim 5, wherein the inorganic binder is water glass. 9. A method wherein the inorganic binder is not more than 200 mesh of crushed particles of recovered glass product per 100 parts by weight of water glass.
The method for producing a communicating porous glass sintered body according to claim 5, comprising a slurry-like liquid to which 0 to 150 parts by weight is added and mixed. 10. The recovered glass product crushed particles are, for example, from 8 to 20.
Mesh, 20-30 mesh, etc.
The method for producing a continuous porous glass sintered body according to claim 5 or 6, wherein the porous glass sintered body is a section or a mixture of two or more sections. 11. The production of a continuous porous glass sintered body according to claim 10, wherein the crushed particles of the recovered glass product are separated for each color and are one kind or a mixture of two or more kinds. Method.