KR101438661B1 - Molded body for manufacturing foamed glass, method for manufacturing the same and method for manufacturing foamed glass - Google Patents

Abstract

The present invention relates to a molded article for the production of foamed glass, a process for producing the same, and a process for producing the foamed glass, which comprises a pelletized foam and a coating layer coated on the surface of the pelletized foam, In the case of producing foamed glass using a molded product for manufacture, it is possible to produce foamed glass which shows superior strength as compared with conventional foamed glass.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded body for manufacturing a foamed glass, a method for producing the molded body, and a method for manufacturing a foamed glass using the same,

The present invention relates to a molded article for the production of foamed glass, a method for producing the same, and a method for producing the foamed glass using the same. More specifically, the present invention relates to a molded article for producing foamed glass produced from glass, an inorganic substance, a foaming agent and an additive as raw materials, And a method for producing the foamed glass.

Foamed glass is a material that causes homogeneous pores to be blown into the glass to have both the physical properties of the glass itself and the physical properties attributable to the base structure. The above-mentioned foamed glass is an eco-friendly material which can be recycled after waste materials are recycled, since waste glass is used as a raw material. In addition, it has high lightness due to the homogeneous bubble of the material, has a high sound-absorbing property to block and absorb noise and vibration, and has other excellent properties such as cold insulation, insulation of insulation, high fire resistance and nonflammability, And has an advantage of easy processing. Therefore, it is used for industrial waterproofing, heat resistance and durability. Especially, it is used as a good thermal insulating material and sound absorbing material in structures and buildings.

The manufacturing principle of foamed glass has already been proposed in the late 1930s. As an example of such a method, a glass of a special composition is mixed together with a reducing agent such as carbon and a bubble forming agent containing an oxide, sulfate or other types of oxidizing components, followed by pulverizing the blended mixture, So as to be baked until softening or melting.

During this heat treatment, a redox reaction occurs between carbon and sulfur oxides (or oxides or oxides of glass), resulting in the molten glass containing SO2, CO2, N2, H2S or other gases, which are low density, And forms a glass gas. As a result, if the best results are obtained, the structure of the glass will have airtight pores that are immiscible with water or water vapor, or other liquids and gases.

The manufacturing process of the foamed glass and the foamed glass manufactured according to such a manufacturing principle has been extensively studied and already commercialized in various countries. Particularly, nowadays, foamed glass is being produced by using pulverized glass bottles, waste glass, etc. as raw materials for foamed materials through processes such as pulverization and pulverization, since waste resources can be recycled and recycled after disposal.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart showing a conventional method for producing foamed glass using a molded article for producing foamed glass.

Referring to FIG. 1, a conventional molded article for producing foamed glass is produced by powdering or molding a glass, an inorganic substance, a foaming agent, an additive, etc. by pulverizing, drying and mixing the molded article. Followed by heat treatment and foaming to prepare a foamed glass.

The conventional foamed glass produced by the above-mentioned method has a problem that the strength is weakened because it forms a lot of pores in the foamed glass, so that it is necessary to improve the physical properties such as strength improvement.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a molded article for manufacturing foamed glass capable of improving the strength of the foamed glass.

Another object of the present invention is to provide a method for manufacturing the above-mentioned molded article for producing foamed glass.

Another object of the present invention is to provide a method for producing a foamed glass using the molded article for producing the foamed glass.

In order to achieve the above object, the present invention provides a molded article for producing foamed glass, which comprises a pellet-shaped foam and a coating layer coated on the surface of the pellet-shaped foam.

The pelletized foam includes a mixture of glass, an inorganic and a foaming agent, and the coating layer may comprise a mixture of glass and an inorganic material.

The pelletized foam may further comprise an additive.

The coating layer may further comprise an additive.

The pellet-shaped foam and the glass contained in the coating layer may be at least one selected from the group consisting of a plate glass, a white glass, a bottle glass, and a waste glass.

The pelletized foam and the inorganic material contained in the coating layer may be at least one selected from the group consisting of perlite, iron ore, fly ash, shale, diatomaceous earth and zeolite.

The foaming agent contained in the pellet-shaped foamed body may be at least one selected from the group consisting of limestone, petroleum (oyster), calcium carbonate, sodium carbonate, sawdust, wood powder and carbon.

The additive may be borax or water glass.

The mixture of the glass, the inorganic substance and the foaming agent contained in the pelletized foam, and the glass contained in the coating layer and the mixture of the inorganic substance may be respectively ground to a particle size of 200 mesh or less .

The mixture of the glass, the inorganic substance, the foaming agent and the additive contained in the pellet-shaped foam may be ground to a particle size of 200 mesh or less.

The mixture of the glass, the inorganic substance and the additive contained in the coating layer may be ground to a particle size of 200 mesh or less.

The mixture contained in the pellet-shaped foam may contain 50 to 96% by weight of the glass, 3 to 49% by weight of the inorganic substance, and 0.5 to 10% by weight of the blowing agent.

The mixture contained in the pellet-shaped foam may be a mixture of 50 to 96% by weight of the glass, 3 to 49% by weight of the inorganic substance, 0.5 to 10% by weight of the foaming agent and 0.5 to 10% by weight of the additive .

The mixture contained in the coating layer may contain 40 to 90% by weight of the glass and 10 to 60% by weight of the inorganic material.

The mixture contained in the coating layer may include 40 to 90 wt% of the glass, 9 to 55 wt% of the inorganic material, and 1 to 5 wt% of the additive.

In addition, the present invention provides a method for manufacturing a semiconductor device, comprising: preparing a glass, an inorganic material, and a foaming agent; Crushing and mixing the glass, the inorganic material and the foaming agent to form a first mixture; Molding the first mixture to form a pelletized foam; And coating the surface of the pellet-shaped foamed body with a second mixture containing glass and an inorganic substance to form a coating layer.

The method may further include drying the glass and the inorganic substance before the step of forming the first mixture.

The first mixture may further comprise an additive.

The second mixture may further comprise an additive.

The step of forming the pellet-shaped foam and the step of forming the coating layer may be performed using a rotary molding machine.

After the step of forming the coating layer, a drying step may be further included.

The present invention also provides a method for producing a foamed glass article, which comprises heating a molded article for producing a foamed glass produced by any one of the above methods for producing foamed glass to a melt blowing temperature to melt and soften the glass contained in the molded article for producing a foamed glass, Forming a molten foamed glass; And molding the molten foamed glass. The present invention also provides a method for producing a foamed glass, comprising the steps of:

The melt blowing temperature may be 700 ° C to 1000 ° C.

The melt blowing temperature may be 800 ° C to 850 ° C.

The step of molding the molten expanded glass may be performed by a hot rolling method or a molding method.

When a foamed glass is produced by using the molded article for producing foamed glass of the present invention, it is possible to produce foamed glass which exhibits excellent strength as compared with the conventional foamed glass.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart showing a conventional method for producing foamed glass using a molded article for producing foamed glass.
2 is a photograph showing a molded body for manufacturing foamed glass manufactured according to an embodiment of the present invention.
3- (a) to 3- (d) are cross-sectional photographs of a foamed glass produced according to Examples 5 to 8 of the present invention.

Hereinafter, the present invention will be described in detail.

The present invention provides a molded article for producing foamed glass, which comprises a pelletized foam and a coating layer coated on the surface of the pelletized foam.

The pelletized foam includes a mixture of glass, an inorganic and a foaming agent.

The glass can be used as a raw material of the molded article for producing the foamed glass, and the glass can be any glass material, such as plate glass, white glass, bottle glass or waste glass, regardless of the type thereof. When the plate glass or the bag glass is used, it is advantageous in expressing the color of the inorganic raw material with excellent whiteness. In the case of the bottle glass, the waste glass is advantageous in expressing the green color, It can be advantageous in that it is easy to supply and receive, and the waste glass can be recycled.

As the inorganic material, perlite, iron ore, fly ash, shale, diatomaceous earth, zeolite, or the like may be used as the inorganic material for improving handleability and compactness. The pearlite is excellent in whiteness and the iron ore can be used for improving the physical properties of a coloring agent or foamed glass. The fly ash is advantageous for gray-hue color development. The shale is inexpensive, and the diatomaceous earth and the zeolite And has a soil modification effect.

The foaming agent is a raw material used for foaming and lightening. Examples of the foaming agent include limestone, petal (oyster), calcium carbonate, sodium carbonate, sawdust, wood powder, and carbon. The limestone or petri dish is foamed at a relatively low temperature of 700 ° C to 800 ° C, and sodium carbonate is advantageous in that homogeneous foaming is possible.

On the other hand, the pellet-shaped foam may further include an additive.

The additive may be used to further improve the strength of the foamed glass, and examples of the additive include borax or water glass.

The blend included in the pelletized foam may comprise about 50 to about 96 weight percent of the glass, about 3 to about 49 weight percent of the inorganic material, and about 0.5 to about 10 weight percent of the blowing agent, When the additive is included in the mixture, the glass may be mixed in an amount of 50 to 96% by weight, the inorganic filler in an amount of 3 to 49% by weight, the blowing agent in an amount of 0.5 to 10% by weight and the additive in an amount of 0.5 to 10% have.

The coating layer comprises a mixture of glass and minerals.

The glass or inorganic material of the coating layer may be the same or similar to that contained in the pelletized foam in its kind.

Meanwhile, the coating layer may further include an additive, and the additive may be the same or similar to that contained in the pellet-shaped foam in its kind.

The mixture contained in the coating layer may comprise about 40 to about 90% by weight of the glass and about 10 to about 60% by weight of the inorganic material. When the additive is included in the mixture, 40 to 90 wt%, 9 to 55 wt% of the inorganic material, and 1 to 5 wt% of the additive.

The glass, the inorganic material, the foaming agent and the additive contained in the pellet-shaped foam and the glass, the inorganic material and the additive contained in the coating layer may each be ground to a particle size of 200 mesh or less .

If the particle size is larger than 200 mesh, the melt softening of the glass can not be smoothly performed when the molded article for producing foamed glass is heated, the foaming reaction of the foaming agent is lowered and the foaming is not homogenized.

The molded article for producing a foamed glass according to the present invention is characterized in that when the surface of the pelletized foam is coated with the coating layer and the foamed glass is heated to produce a foamed glass, the honeycomb structure has a large section modulus and is resistant to bending and twisting, There is an effect of remarkably excellent strength as compared with the foamed glass using the molded body for producing foamed glass of the conventional powder form or the molded body for producing foamed glass without the coated layer. For example, in the compressive strength, the bending strength and the like, the strength value is remarkably superior to that of the conventional foamed glass (see Table 1).

2 is a photograph showing a molded article for manufacturing foamed glass according to an embodiment of the present invention. Referring to FIG. 2, a molded article for producing a pelletized foamed glass according to the present invention can be identified.

The present invention also relates to a process for the preparation of pellets comprising the steps of: a) preparing a glass, an inorganic and a foaming agent, b) grinding and mixing said glass, said inorganic substance and said foaming agent to form a first mixture, c) Shaped foam; and d) coating the surface of the pelletized foam with a second mixture comprising glass and an inorganic substance to form a coating layer. .

The glass contained in the first mixture may be used as a raw material of the molded article for producing the foamed glass without limitation regardless of the type of the glass if it is a glass component such as a plate glass, a glass glass, a bottle glass or a waste glass . When the plate glass or the bag glass is used, it is advantageous in expressing the color of the inorganic raw material with excellent whiteness. In the case of the bottle glass, the waste glass is advantageous in expressing the green color, It can be advantageous in that it is easy to supply and receive, and the waste glass can be recycled.

As the inorganic material, perlite, iron ore, fly ash, shale, diatomaceous earth or zeolite may be used as the inorganic material to be used for improving handleability and compactness of the first mixture . The pearlite is excellent in whiteness and the iron ore can be used for improving the physical properties of a coloring agent or foamed glass. The fly ash is advantageous for gray-hue color development. The shale is inexpensive, and the diatomaceous earth and the zeolite And has a soil modification effect.

The foaming agent contained in the first mixture is used for foaming and lightening. Examples of the foaming agent include limestone, calcium carbonate, sodium carbonate, sawdust, wood powder, and carbon. The limestone or petri dish is foamed at a relatively low temperature of 700 ° C to 800 ° C, and sodium carbonate is advantageous in that homogeneous foaming is possible.

On the other hand, the first mixture may further contain an additive.

The additive may be used to further improve the strength of the foamed glass, and examples of the additive include borax or water glass.

The glass or the inorganic material contained in the second mixture may be the same or similar to that contained in the first mixture in its kind.

Meanwhile, the second mixture may further include an additive, and the additive may be the same or similar to that contained in the first mixture in its kind.

In the method for producing a molded article for producing a foamed glass, before the step of forming the first mixture, drying the glass, the inorganic substance and the foaming agent may be further performed for smooth grinding. Further, after the step of forming the coating layer, a drying step may be further performed to improve handling strength.

The present invention also provides a method for producing a foamed glass product, comprising the steps of: heating a molded article for producing foamed glass produced by the above method to a melt blowing temperature to melt and soften the glass contained in the molded article for foamed glass production and foaming the foaming agent to form a melted foamed glass; A method of manufacturing a foamed glass including the step of forming a glass is provided.

The melt blowing temperature may be about 700 ° C to 1000 ° C, and preferably about 800 ° C to 850 ° C. At the above-mentioned melt blowing temperature, the glass is melted and softened, and the blowing agent distributed among the melted glass releases gas and can cause a foaming reaction. On the other hand, the physical properties such as strength, specific gravity, and foaming properties can be controlled by controlling the content of the inorganic substance and the type of the foaming agent during the production of the molded article for producing foamed glass.

The step of molding the molten foamed glass may be performed by a hot rolling method or a mold forming method, though not particularly limited thereto.

3 is a photograph of a foamed glass manufactured according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples. However, the following examples illustrate the present invention, and the contents of the present invention are not limited by the examples.

Example  1: Coated Pellet type  For making foamed glass Of the shaped body  Produce

87 g of waste glass, 10 g of perlite and 3 g of shale were dried for about 70 minutes, and then mixed with 2 g of calcium carbonate (CaCO ₃ ). The mixture was crushed to a particle size of 200 mesh or less by using hammer crusher and ball mill, . Thereafter, the pulverized mixture was molded into a pellet form using a pelletizer to prepare a pellet-shaped foam. Thereafter, a mixture of waste glass powder and perlite powder in a weight ratio of 8: 2 was coated on the surface of the pellet-shaped foam to prepare a molded article for producing foamed glass.

Example  2: Coated Pellet type  For making foamed glass Of the shaped body  Produce

84 g of waste glass and 12 g of perlite were dried for about 70 minutes and then mixed with ₃ g of calcium carbonate (CaCO ₃ ), 2 g of borax and 2 g of sodium silicate, and this was pulverized to a particle size of 200 mesh or less using a hammer crusher and a ball mill To prepare a pulverized mixture. Thereafter, the pulverized mixture was molded into a pellet form using a pelletizer to prepare a pellet-shaped foam. Thereafter, a mixture of waste glass powder and perlite powder in a weight ratio of 7: 3 was coated on the surface of the pelletized foam to prepare a molded article for producing foamed glass.

Example  3: Coated Pellet type  For making foamed glass Of the shaped body  Produce

84 g of waste glass and 12 g of perlite were dried for about 70 minutes and then mixed with 5 g of calcium carbonate (CaCO ₃ ), 2 g of borax and 2 g of sodium silicate, and the mixture was crushed to a particle size of 200 mesh or less using a hammer crusher and a ball mill To prepare a pulverized mixture. Thereafter, the pulverized mixture was molded into a pellet form using a pelletizer to prepare a pellet-shaped foam. Thereafter, a mixture in which the waste glass powder and the powder of perlite were mixed at a weight ratio of 6: 4 was coated on the surface of the pellet-shaped foam to prepare a molded article for producing a foamed glass.

Example  4: Coated Pellet type  For making foamed glass Of the shaped body  Produce

85 g of waste glass and 15 g of perlite were dried for about 70 minutes and then mixed with 5 g of calcium carbonate (CaCO ₃ ). The mixture was crushed using a hammer crusher and a ball mill to a particle size of 200 mesh or less to prepare a pulverized mixture. Thereafter, the pulverized mixture was molded into a pellet form using a pelletizer to prepare a pellet-shaped foam. Thereafter, a mixture of waste glass powder and iron ore powder at a weight ratio of 8: 2 was coated on the surface of the pellet-like foam to prepare a molded article for producing foamed glass.

Example  5 ~ 8: Manufacture of foamed glass

The molded bodies for manufacturing foamed glass prepared in Examples 1 to 4 were dried for about 90 minutes through a mesh conveyer type tunnel drier, respectively, and then foamed at about 800 ° C for about 20 to 60 minutes to prepare foamed glass.

Comparative Example  One : Powder formula  For making foamed glass The molded article  Manufacture of foamed glass

87 g of waste glass, 10 g of perlite and 3 g of shale were dried for about 70 minutes, and then mixed with 2 g of calcium carbonate (CaCO ₃ ). The mixture was crushed to a particle size of 200 mesh or less by using hammer crusher and ball mill, And the mixture was compressed using a mold to prepare a molded article for producing foamed glass. Thereafter, the molded article for foamed glass was foamed at about 700 ° C for about 20 minutes and at about 800 ° C for about 60 minutes to prepare a foamed glass.

Comparative Example  2 : Powder formula  For making foamed glass The molded article  Manufacture of foamed glass

84 g of waste glass and 12 g of perlite were dried for about 70 minutes and then mixed with ₃ g of calcium carbonate (CaCO ₃ ), 2 g of borax and 2 g of sodium silicate, and this was pulverized to a particle size of 200 mesh or less using a hammer crusher and a ball mill To prepare a pulverized mixture, which was then compressed using a mold to prepare a molded body for producing foamed glass. Thereafter, the molded article for foamed glass was foamed at about 700 ° C for about 20 minutes and at about 800 ° C for about 60 minutes to prepare a foamed glass.

Comparative Example  3: Powder formula  For making foamed glass The molded article  Manufacture of foamed glass

85 g of waste glass and 15 g of perlite were dried for about 70 minutes and then mixed with 5 g of calcium carbonate (CaCO ₃ ). The mixture was crushed to a particle size of 200 mesh or less using a hammer crusher and a ball mill to prepare a pulverized mixture, This was compressed using a mold to prepare a molded article for producing foamed glass. Thereafter, the molded article for foamed glass was foamed at about 700 ° C for about 20 minutes and at about 800 ° C for about 60 minutes to prepare a foamed glass.

The physical properties of the foamed glass produced in Examples 5 to 8 and the foamed glass prepared in Comparative Examples 1 to 3 were measured and are shown in Table 1 below. The strength measurements were measured in lightweight aggregates (DIN en 13055-1) (unit: kgf / cm ² ).

division Example Comparative Example 5 6 7 8 One 2 3 Porosity (%) 65 58 61 52 70 65 63 (G / cm < 3 >) 0.35 0.53 0.45 0.6 0.32 0.41 0.45 Compressive strength (kgf / cm2) 50 124 75 150 24 45 53 Bending strength (kgf / cm2) 31 81 62 95 21 35 42 combustibility Fire Fire Fire Fire Fire Fire Fire

As shown in Table 1, it can be seen that the foamed glass produced in Examples 5 to 8 is superior in compression strength and bending strength to foamed glass produced in Comparative Examples 1 to 3, and in particular, in Examples 6 and 8 Compared to the foamed glass produced in the comparative example, the foamed glass produced was remarkably superior in compression strength from about 2.5 to about 6 times and bending strength from about 2 to about 5 times.

Claims (25)

And a coating layer coated on the surface of the pelletized foam,
Characterized in that the pelletized foam comprises a mixture of glass, an inorganic and a foaming agent, the coating layer comprising a mixture of glass and minerals. delete The formed article for producing foamed glass according to claim 1, wherein the pellet-shaped foam further comprises an additive. The molded article for producing foamed glass according to claim 1, wherein the coating layer further comprises an additive. The molded article for manufacturing foamed glass according to claim 1, wherein the glass contained in the pelletized foam and the coating layer is at least one selected from the group consisting of a plate glass, a white glass, a bottle glass, and a waste glass. The method according to claim 1, wherein the inorganic material contained in the pelletized foam and the coating layer is at least one selected from the group consisting of perlite, iron ore, fly ash, shale, diatomaceous earth, and zeolite Molded body for manufacturing foamed glass. The foamed glass according to claim 1, wherein the foaming agent contained in the pelletized foam is at least one selected from the group consisting of limestone, petroleum (oyster), calcium carbonate, sodium carbonate, sawdust, wood powder, . The molded article for manufacturing foamed glass according to claim 3 or 4, wherein the additive is borax or water glass. The glass composition according to claim 1, wherein the glass contained in the pelletized foam, the mixture of the inorganic substance and the blowing agent, and the glass contained in the coating layer and the mixture of the inorganic substance each have a particle size of 200 mesh or less Wherein the molded product is pulverized. 4. The molded article for producing a foamed glass according to claim 3, wherein the glass, the inorganic material, the foaming agent, and the additive contained in the pelletized foam are ground to a particle size of 200 mesh or less. The molded article for producing foamed glass according to claim 4, wherein the glass, the inorganic material and the mixture of the additives contained in the coating layer are ground to a particle size of 200 mesh or less. [3] The method according to claim 1, wherein the mixture contained in the pellet-shaped foam comprises 50 to 96% by weight of the glass, 3 to 49% by weight of the inorganic material and 0.5 to 10% by weight of the blowing agent Molded body for manufacturing foamed glass. 4. The method of claim 3, wherein the mixture contained in the pelletized foam comprises 50 to 96 wt% of the glass, 3 to 49 wt% of the inorganic material, 0.5 to 10 wt% of the foaming agent, and 0.5 to 10 wt% By weight based on the total weight of the composition. [2] The molded article for manufacturing foamed glass according to claim 1, wherein the mixture contained in the coating layer comprises 40 to 90% by weight of the glass and 10 to 60% by weight of the inorganic material. [Claim 4] The foamed glass according to claim 4, wherein the mixture contained in the coating layer comprises 40 to 90% by weight of the glass, 9 to 55% by weight of the inorganic substance, and 1 to 5% Molded article for manufacturing. Preparing a glass, an inorganic and a foaming agent;
Crushing and mixing the glass, the inorganic material and the foaming agent to form a first mixture;
Molding the first mixture to form a pelletized foam; And
And coating the surface of the pellet-shaped foamed body with a second mixture containing glass and an inorganic substance to form a coating layer. 18. The method of claim 16,
Further comprising a step of drying the glass and the inorganic substance before the step of forming the first mixture. 18. The method of claim 16,
Wherein the first mixture further comprises an additive. ≪ RTI ID = 0.0 > 11. < / RTI > 18. The method of claim 16,
Wherein the second mixture further comprises an additive. ≪ RTI ID = 0.0 > 11. < / RTI > 18. The method of claim 16,
Wherein the step of forming the pellet-shaped foam and the step of forming the coating layer are carried out using a rotary molding machine. 18. The method of claim 16,
The method of claim 1, further comprising a drying step after the step of forming the coating layer. A method for producing a foamed glass according to any one of claims 16 to 21, which comprises heating a molded article for producing foamed glass to a melt-blowing temperature to melt and soften the glass contained in the molded article for foamed glass production and foaming the foaming agent to form a melted foamed glass ; And
And molding said molten expanded glass. ≪ RTI ID = 0.0 > 11. < / RTI > 23. The method of claim 22,
Wherein the melt foaming temperature is 700 ° C to 1000 ° C. 23. The method of claim 22,
Wherein the melt-blowing temperature is 800 ° C to 850 ° C. 23. The method of claim 22,
Wherein the step of molding the molten expanded glass is performed by a hot rolling method or a molding method.

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