JP2002348181A - Glass wool sintered body, method for producing the same, and processing material containing the same - Google Patents

Abstract

(57) [Summary] [Problem] To provide a highly usable glass wool sintered body that can effectively reduce the volume of glass wool and that can reuse waste material, a method of manufacturing the same, and various materials including the sintered body. I do. A glass wool sintered body obtained by sintering glass wool such as waste glass wool. The specific gravity of the sintered body is preferably 0.05 g / cm ³ or more. The sintered body is manufactured by heat-treating glass wool at 600 to 900 ° C. The heating time is 1 to 90 minutes, and the volume of the glass wool after sintering is 1 volume of the glass wool before sintering.
Is preferably 0.4 or less. The sintered body is used as a tile, an ecological protection material, a soil material, and an aggregate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass wool sintered body, a method for producing the same, and a material to be treated containing the glass wool sintered body. The present invention relates to a sintered body, a method for producing the same, and a treatment material including the glass wool sintered body.

[0002]

2. Description of the Related Art Glass wool is used as a heat insulating material in thermal power plants, various manufacturing industries, construction industries and other industries. Such heat insulating materials are discarded after being used for many years and when dismantling piping, equipment, buildings, and the like. This waste glass wool is bulky and difficult to compress, so that the cost of transporting it by weight is high, and since it cannot be recycled, its entire amount is landfilled. However, waste glass wool is bulky and cannot be efficiently landfilled, requiring a large landfill space.

[0003] So far, there has been an example of examining melting as a general compression and volume reduction technique for heat insulating materials. However, the melting temperature of glass wool is as high as 1300 ° C or more, and melting of glass wool is considered in terms of both energy and cost. Was determined to be unreasonable.

[0004] From the viewpoint of recycling, glass wool manufacturers have begun to return waste glass wool to a furnace, melt it, and mix it with new glass wool.
This method is not worth both energy and cost.

Energy required for processing glass wool,
There is an urgent need for the development of glass wool treatment technology capable of reducing costs and the like and technology capable of effectively recycling waste glass wool.

Accordingly, the present inventor has conducted intensive studies to solve the above-mentioned problems, and as a result, has noticed that glass wool has a low melting point among heat insulating materials, and furthermore, the melting point which requires heat treatment at a high temperature as described above. Rather, the sintering is performed at a processing temperature equal to or lower than the melting temperature, for example, less than 1000 ° C., such as about 700 ° C., so that a volume reduction rate equivalent to that of melting (about 1/30 with respect to a packaged state) is obtained. Make sure that
The present invention has been completed.

In addition, by adopting such a method of sintering glass wool, energy consumption and cost can be reduced as compared with the current waste glass wool transportation and landfill treatment, and the obtained glass wool can be obtained. It has been found that the sintered body can be effectively reused.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above circumstances, and aims to reduce the energy and cost required for processing glass wool and to effectively reduce the volume of glass wool. It is an object of the present invention to provide a glass wool sintered body, a method for producing the same, and a treatment material including the glass wool sintered body.

Another object of the present invention is to provide a glass wool sintered body which can be reused and has high utility value, and a method for producing the same, and a treatment material including the glass wool sintered body. It is in.

[0010]

The glass wool sintered body according to the present invention is characterized in that glass wool is heat-treated at a melting temperature or lower and sintered.

In the above glass wool sintered body, waste glass wool can be used as the raw material glass wool.

The specific gravity of the glass wool sintered body is 0.0
It is preferably at least 5 g / cm ³ .

The above glass wool sintered body can be obtained by subjecting glass wool to a heat treatment at a temperature of 600 to 900 ° C., which is lower than the melting temperature.

The method for producing a glass wool sintered body according to the present invention comprises the steps of:
It is characterized by being sintered by heating for 0 minutes.

In this method for producing a glass wool sintered body, the heat treatment temperature is preferably 650 to 750 ° C., and the heat treatment time is preferably several minutes to 30 minutes.

In the method for producing a glass wool sintered body, it is preferable that the heat treatment is performed so that the volume of the glass wool after sintering becomes 0.4 or less with respect to the volume 1 of the glass wool before sintering.

In the above method for producing a glass wool sintered body, waste glass wool can be used as the raw material glass wool.

The tile of the present invention is characterized in that the mixture of the above-mentioned glass wool sintered body and clay is fired.

The ecological protection material of the present invention is characterized by comprising the above-mentioned glass wool sintered body. Examples of the ecological protection material include seawall materials.

The soil material of the present invention is characterized by comprising the above-mentioned glass wool sintered body.

The aggregate of the present invention is characterized in that it is made of a glass wool sintered body.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is characterized in that a glass wool sintered body is obtained by sintering glass wool.

By sintering the glass wool in this manner, the energy required for the treatment can be greatly reduced as compared with the melting treatment requiring a high temperature, and the volume of the bulky glass wool is favorably reduced. be able to.

The glass wool used in the present invention is not particularly limited, and is, for example, 32 kg / m ³ or 64 k.
Any of high density materials such as g / m ³ and low density materials such as 6 kg / m ³ can be used. In particular, if waste materials (waste glass wool) used as heat insulating materials are used, the waste materials can be disposed of effectively,
The obtained sintered body can be used as a new product, and by recycling it, waste material can be effectively used and the use value can be increased.

As the glass wool sintered body of the present invention obtained by sintering the above glass wool, the degree of sintering and properties may be any as long as the purpose of volume reduction is achieved, and various types are applicable. You. For example, when landfilling the sintered glass wool, if the sintered body satisfies a desired volume reduction rate, at least a part of the sintered body is sintered in addition to the completely sintered state. For example, the surface may be sintered, and may have an unsintered portion inside.

In the present invention, when a sintered body is reused, a sintered body having properties such as a sintering degree, specific gravity, and hardness suitable for the intended use can be obtained.

The volume reduction ratio of the glass wool sintered body of the present invention obtained by sintering the glass wool is preferably 0.4 or less, more preferably 0.4 or less, as the volume of the raw material glass wool 1 before sintering. Is 0.16 or less, particularly preferably 0.08 to 0.01. Thus, the glass wool is reduced to 2/5 or less, preferably 1/6 or less, particularly 1 /
By reducing the volume to 12 to 1/100, the cost required for treating waste glass wool is significantly reduced as compared with the conventional method of transporting and landfilling waste glass wool as it is.

Further, in order to more effectively reduce the volume, the specific gravity of the glass wool sintered body is preferably 0.05
g / cm ³ or more, more preferably 1.0 g / cm ³ or more, and more preferably 1.6 g / cm ³ or more. Further, the specific gravity of such a glass wool sintered body may be determined according to the use of the sintered body. For example,
When the glass wool sintered body is directly placed in water and used as an ecological protection material, for example, a seawall material such as a tetrapot, a sintered body having a specific gravity of 1 g / cm ³ or more is preferable.

The above-mentioned glass wool sintered body can be obtained by heating and sintering glass wool at a temperature of 600 to 900 ° C.

The heat treatment temperature is usually 60 or less below the melting temperature.
The temperature is preferably from 0 to 900 ° C, more preferably from 650 to 80 ° C.
0 ° C., most preferably about 650-750 ° C. and especially 70 ° C.
Around 0 ° C. is preferred.

In such a temperature range, it is possible to sinter glass wool satisfactorily, reduce the processing energy, and efficiently obtain a glass wool sintered body having a high shrinkage (volume reduction). it can.

On the other hand, if the temperature is lower than the above-mentioned temperature range, the purpose of volume reduction cannot be achieved because the glass wool does not sinter, and if the temperature is too high, a boiled appearance is exhibited, and a useful and good value is obtained. A sintered body cannot be obtained.

In the glass wool sintered body of the present invention, the heat treatment temperature can be selected in the above temperature range according to the intended use of the glass wool sintered body.

For example, when obtaining a glass wool sintered body having a high specific gravity, being hard, and having fine irregularities, the heat treatment temperature is preferably set to around 700 ° C., such as about 650 to 730 ° C. When the heat treatment temperature is 750 ° C. or higher, a glass wool sintered body having a low specific gravity, softness, and large unevenness is easily obtained.

The heat treatment time may be appropriately selected according to the size of the raw material glass wool, the heat treatment temperature, the desired volume reduction rate, and the like, and is usually about 1 to 2 to 90 minutes. If the heat treatment time is too short, the desired volume reduction effect cannot be obtained. On the other hand, an increase in the volume reduction rate cannot be expected even if the heat treatment time is lengthened, and an increase in the processing energy is not preferred.

For example, in order to obtain a sintered compact having a high volume reduction ratio more economically and efficiently using glass wool of about 5 cm square, the heat treatment time is preferably 5 to 60 minutes, more preferably 5 to 60 minutes. It is desirable to set it to 40 minutes, more preferably 5 to 20 minutes, and most preferably about 10 minutes.

When the heat treatment time is prolonged, a boiled appearance is exhibited, and a sintered body having a low specific gravity and a small soft density is easily obtained. In order to obtain a sintered body having a high specific gravity and a high rigidity, the heat treatment time is preferably short, and varies depending on the heat treatment temperature. For example, at around 700 ° C. as described above, the heat treatment time is several times. Min ~ 3
It is preferably about 0 minutes, more preferably about 10 minutes.

The sintering of glass wool is usually carried out at normal pressure, but may be carried out under pressure or under reduced pressure.

The production of the glass wool sintered body of the present invention is carried out by pulverizing raw glass wool into a predetermined size, introducing it into an electric furnace as a heating furnace, and heating it at a predetermined temperature for a required time to perform sintering. be able to. The production of the glass wool sintered body may be performed by a batch process or a continuous process.

For example, a metal such as zirconium or SiO
A heat-resistant container such as a _two -piece crucible may be heated in advance by an electric furnace as a heating furnace, and glass wool of a predetermined size may be put into the heat-resistant container and batch-processed at a predetermined temperature for a predetermined time. In this case, a portion of the glass fiber at the portion touching the bottom surface of the crucible, the iron plate or the like may slightly remain, but this can be avoided by inverting the glass wool and heating for 5 to 10 minutes.

As a continuous production method of a glass wool sintered body, for example, after the raw material glass wool is pulverized in advance,
While crushing with a feeder or a toothed conveyor,
It can be carried out by continuously supplying to an electric furnace as a heating furnace, performing heat treatment with stirring in the electric furnace, and continuously taking out the sintered body from the electric furnace.

By performing the heat treatment and sintering in this manner, the volume of glass wool before sintering is preferably not more than 0.4, more preferably not more than 0.16, particularly preferably not more than 0.08. A sintered body reduced in volume to 0.01 can be obtained.

Further, the above heat treatment preferably results in at least 0.05 g / cm ³ , more preferably 1.0 g / cm ^3.
cm ³ or more, more preferably it is possible to obtain a glass wool sintered body having a 1.6 g / cm ³ or more gravity.

The glass wool sintered body of the present invention can be used as various processing materials or materials to be processed.

For example, a good tile product can be obtained by firing a mixture of the glass wool sintered body of the present invention and clay. Specifically, a tile product can be manufactured by pulverizing a glass wool sintered body to a predetermined size, mixing it with clay in a predetermined ratio, and firing at a temperature of about 900 ° C.

The firing temperature in the conventional tile production is 12
Although a high temperature of 00 ° C. was required, in the tile production of the present invention, the glass wool sintered body could be used and fired at a temperature lower than the melting temperature of about 900 ° C. I can do it.

The tile product of the present invention can be manufactured at a lower cost than conventional products, and since the glass wool sintered body has a low shrinkage and water absorption due to firing, the glass wool sintered body is excellent as a material for the tile, and a good tile Can be obtained.

Since the sintered body of the present invention has the characteristics of light weight and porosity, it is possible to make use of this characteristic by using a glass wool sintered body (light) soil material or a glass wool sintered body. It can be used as an ecological protection material and other useful treatment materials or materials to be treated.

For example, a soil material formed of a glass wool sintered body is suitable for a case where lightness is required, such as a rooftop greening soil. In addition, utilizing the unevenness (porosity) of the sintered body, the glass wool sintered body and seawall material, riverbed material of river,
By using it as a treatment material such as a porous tile material, the growth rate of young shoots and the like is increased, which helps protect the ecosystem. Also,
It is porous and can be used as a material such as a sidewalk paving stone by utilizing water permeability.

In the present invention, the sintered body is light in weight and
The degree and properties of the porosity and the like can be obtained by adjusting the processing conditions (heating temperature, heating time, etc.) when sintering the glass wool as described above. A suitable glass wool sintered body can be provided.

Further, in the present invention, the sintering of glass wool suppresses the alkali-aggregate reaction caused by the contact between the alkali component of glass wool and cement or the like. It can be used for various aggregates.

[0052]

Test Examples Hereinafter, the present invention will be described more specifically based on test examples, but the present invention is not limited to these test examples.

[Test Example 1] The height, width and height were each 15
A crucible made of zirconium is placed in an electric furnace having a diameter of 5 cm and then heated to a required temperature in advance.
A glass wool having a density of 32 kg / cm ³ , for example, cut into 5 cm squares was put into the electric furnace and returned to an electric furnace at 300 ° C., 40 ° C.
0 ° C, 500 ° C, 550 ° C, 600 ° C, 650 ° C, 70
0 ° C, 750 ° C, 800 ° C, 850 ° C, 900 ° C, 10
FIG. 1 shows an example in which glass wool is sintered by performing heat treatment at each heat treatment temperature of 00 ° C. for 20 minutes.

FIG. 1 shows the relationship between the specific gravity of the glass wool sintered body and the processing temperature during a sintering time of 20 minutes.

From FIG. 1, the glass wool sintered body was 700 ° C.
Near the maximum shrinkage rate (specific gravity: about 1.3 g / cm ³ ), and above 700 ° C., bubbles like a boiling state were formed, and the specific gravity decreased.

When the temperature of the heat treatment was between 750 ° C. and 900 ° C., the glass wool was in a transition period from the sintering state to the melting state, and the shrinkage ratio tended to increase again. 850 ° C-9
When the glass wool was heat-treated at a heat treatment temperature of 00 ° C., the glass wool was in a mixed state of sintering and melting, and the sintered / melted glass wool was attached to the crucible and stuck, so that accurate Data could not be taken. At a heat treatment temperature of 1000 ° C,
The glass wool was found to melt and become liquefied in the crucible.

When the heat treatment temperature is 600 ° C. or less,
Little change in specific gravity was observed during the heat treatment for 20 minutes. At this heat treatment temperature, the binder (yellow) contained in the glass wool volatilized and only changed to white.

FIG. 1 shows that the heat treatment temperature for reducing the volume of glass wool is given in consideration of the sintered state of glass wool.
The heat treatment temperature is preferably from 600 ° C. to 900 ° C., and particularly preferably a heat treatment temperature of 650 ° C. to 750 ° C., especially a heat treatment temperature of around 700 ° C., in order to obtain a particularly large volume reduction effect.

[Test Example 2] The height, width and height were each 15
A crucible made of zirconium is placed in an electric furnace having a diameter of 5 cm and then heated to a predetermined temperature.
For example, glass wool having a density of, for example, 64 kg / m ³ cut into a square of 5 cm is put into the electric furnace, and the temperature is set at 300 ° C., 400
° C, 500 ° C, 550 ° C, 600 ° C, 630 ° C, 650
° C, 670 ° C, 680 ° C, 690 ° C, 700 ° C, 710
The glass wool was sintered by performing the treatment for 5 to 60 minutes at each of the heat treatment temperatures of, 730, 750, and 800 ° C.

The results are shown in FIG. 2 and FIG.

FIG. 2 shows the relationship between the specific gravity (g / cm ³ ) of the sintered glass wool and the heat treatment time (minutes) at each heat treatment temperature (sintering temperature), and a, b, c, d , E,
f, g, h, i, and j are heat treatment temperatures (sintering temperatures) of 63.
0 ° C, 650 ° C, 670 ° C, 680 ° C, 690 ° C, 70 ° C
The specific gravity change curve of a glass wool sintered compact in the case of 0 ° C, 710 ° C, 730 ° C, 750 ° C, and 800 ° C is shown. FIG. 3 shows the relationship between the specific gravity (g / cm ³ ) of the glass wool sintered body and the heat treatment temperature (° C.) at each heating time, and the symbols a, b, c, d, and e indicate that the heat treatment time is 5 5 shows specific gravity change curves of a glass wool sintered body in the cases of 1, 10, 15, 20, and 30 minutes.

The surface state of the obtained glass wool sintered body varies depending on the amount of heat (heat treatment temperature, heat treatment time, etc.). For example, when the heat treatment time is as short as 10 to 20 minutes, 700 ° C. 730 as if processed in
Those treated at temperatures below 750 ° C. to 750 ° C. are tough,
The surface had fine irregularities.

On the other hand, those treated at a temperature of 730 ° C. to 750 ° C. or more have a appearance in which the surface of the glass wool sintered body boils, have larger irregularities than at 700 ° C., and are somewhat brittle as a treatment material. Had become. Also, 600
Glass wool treated at a heat treatment temperature lower than ℃
Did not sinter.

When the heat treatment time was within 20 minutes, the glass wool was sintered at 700 ° C. for 20 minutes to obtain the maximum shrinkage (specific gravity: 1.52 g / cm ³ ).

When the heat treatment time was within 30 minutes, the maximum shrinkage (specific gravity: 1.56 g / cm ³ ) was obtained by sintering glass wool at 690 ° C. for 30 minutes. further,
The maximum shrinkage within 60 minutes was obtained under the processing conditions of heating at 680 ° C. for 60 minutes, and the specific gravity at this time was 1.61 g / cm ³ . The sintered body heat-treated under these heat treatment conditions had a hard material, and had fine irregularities on the surface.

As apparent from FIGS. 2 and 3, in Test Example 2, the glass wool sintered body of the present invention was obtained by treating glass wool at 600 to 800 ° C., more preferably at 670 to 730 ° C. Was. Moreover, it can be seen that the glass wool can be satisfactorily reduced in volume by this heat treatment method, and the bulky glass wool can be effectively reduced in volume and disposed of.

In particular, when treated at 670 ° C. to 730 ° C.,
A high volume reduction effect is obtained, and a glass wool sintered body having a high specific gravity is easily obtained in a short heat treatment time of several minutes to about 30 minutes.
Degree) is achieved.

In the present invention, the characteristics of the glass wool sintered body can be adjusted by changing the heat treatment temperature and the heat treatment time when sintering the glass wool.
It can be seen that materials suitable for various applications can be supplied by adjusting the heat treatment temperature and the heat treatment time.

[0069]

According to the present invention, since the glass wool is sintered to form a sintered body, the volume can be reduced well, so that the transportation cost can be reduced and the glass wool is required for sintering. Since the energy is low as compared with the melting treatment, the glass wool can be treated effectively.

The present invention makes it possible to recycle waste glass wool, which has been impossible in the past, by sintering glass wool into a sintered body.

Conventionally, recycled products are generally expensive and inferior to virgin raw materials in market competitiveness. However, according to the glass wool sintered body of the present invention,
It will be possible to provide recycled products with sufficient market competitiveness.

According to the method for manufacturing a glass wool sintered body of the present invention, an optimum sintered body can be manufactured according to its purpose and its use.

Since the glass wool sintered body of the present invention has characteristics such as light weight and porosity, it is useful as a tile material, an ecological protection material, various aggregates and the like.

The tile made of the sintered body of the present invention has a lower temperature (900 ° C.) than the firing temperature (1200 ° C.) of the conventional tile.
° C), so that energy consumption can be reduced and the properties as a tile are excellent.

According to the present invention, since the volume and reuse of glass wool can be reduced, the environmental load can be reduced.

[Brief description of the drawings]

FIG. 1 is a graph of Test Example 1 showing a relationship between a specific gravity of a glass wool sintered body and a heat treatment temperature during a treatment time (sintering time) of 20 minutes.

FIG. 2 is a graph of Test Example 2 showing the relationship between the heat treatment time and the specific gravity of glass wool after sintering.

FIG. 3 is a graph of Test Example 2 showing the relationship between the heat treatment temperature and the specific gravity of a glass wool sintered body when the heat treatment time is 5 minutes to 30 minutes.

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Claims (13)

[Claims] 1. A glass wool sintered body obtained by subjecting glass wool to heat treatment at a melting temperature or lower and sintering the same. 2. The glass wool sintered body according to claim 1, wherein the glass wool is waste glass wool. 3. The glass wool sintered body has a specific gravity of 0.05
The glass wool sintered body according to claim 1, which has a g / cm ³ or more. 4. The glass wool sintered body according to claim 1, wherein the glass wool sintered body is obtained by heat-treating the glass wool at a temperature of 600 to 900 ° C. 5. A glass wool having a melting temperature of from 600 to 600 ° C.
A method for producing a glass wool sintered body, which comprises performing a heat treatment at a temperature of 900 ° C. for 1 to 90 minutes for sintering. 6. The method for producing a glass wool sintered body according to claim 5, wherein the heat treatment temperature is 650 to 750 ° C., and the heat treatment time is several minutes to 30 minutes. 7. The glass wool sintered body according to claim 5, wherein heat treatment is performed so that the volume of the glass wool after sintering becomes 0.4 or less with respect to the volume 1 of the glass wool before sintering. Method. 8. The method for producing a glass wool sintered body according to claim 5, wherein the glass wool is waste glass wool. 9. A tile obtained by firing a mixture of the glass wool sintered body according to claim 1 and clay. 10. An ecological protection material comprising the glass wool sintered body according to claim 1. 11. The ecological protection material according to claim 10, wherein the ecological protection material is a revetment material. 12. A soil material comprising the glass wool sintered body according to claim 1. 13. An aggregate comprising the glass wool sintered body according to claim 1. Description: