KR0132744B1 - The forming ceramics sound absorption board containing waste ash and manufacturing method thereof - Google Patents

Abstract

In the production of a sound absorber, a foaming agent solution is mixed with the water, diluted, wherein the air is ejected in this solution to generate the foam. At this time the foam size of the foaming ceramic solid layer of the sound absorber is determined based on the quantity of the foaming agent. The foaming agent is mixed with the cement, in ratio of 0.01-0.05% so the foam size of the foam ceramic solid layer to be 5-160 micro meter. Also for facilitating the distribution of the foam, the compound is given high speed agitation or mixed by the omni mixer.

Description

Foam ceramic sound absorbing plate using waste ash and its manufacturing method

1 is a view showing a conventional sound absorbing plate.

2 is a view showing a sound absorbing plate according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

11 Composite Panel (Support Plate) 12 Balpu Ceramic Solid Layer

13 bubbles

The present invention relates to a foamed ceramic sound-absorbing plate using waste ash, and in more detail, a foamed ceramic solid layer made of waste ash and cement produced as a by-product or a thermal power plant by-product in a paper manufacturing process, and one end thereof. It relates to a ceramic sound absorbing plate effective for low frequency sound and vibration, characterized in that consisting of a composite panel that is integrally attached to the support plate.

In general, a sound absorbing plate for blocking sound transmitted to the air refers to a material that absorbs reflection sound by converting sound vibration energy into heat energy. The sound absorbing plate is the most widely used fibrous sound absorbing material, but the present invention manufactures a porous type sound absorbing material capable of absorbing low frequency sound and vibration. By using the principle of suppressing the reflected sound by reducing the sound energy by vibrating or rubbing the film.

The performance of the sound absorption effect indicates the sound absorption rate in decibels (dB), which is changed by the size and density of the minute holes in the sound absorption plate. That is, the larger the size of the fine holes (hereinafter referred to as bubbles), the more effective the absorption of high vibration and high frequency sound ranges, and the smaller the size of the life preserver, the more effective the low vibration and low frequency sound ranges. In addition, it can be seen that the sound absorption and sound insulation performance is improved as the thickness of the material, the density, and the density of the rear support plate increase.

Conventionally, the lack of awareness and indifference to noise has gradually increased the desire for a comfortable living environment and the privacy of the individual, the demand for sound absorbing plate is significantly increased, and the sound absorption effect is also desired.

In addition, the structure of the sound absorbing plate itself is simple, so it is easy to manufacture, and as one of the building materials, it is not easily destroyed when constructed at the construction site. There is a need to reduce material waste and to facilitate the countryside.

Conventional sound absorbing plates include Korean Patent Publication No. 83-517 (March 11, 1983, titled: Sound Absorption Building Materials). The sound absorbing plate disclosed in this publication is able to withstand the force exerted transversely to at least two major surfaces of the thick sheet layer 10, which is a primary plate having a plurality of inner pores, as shown in FIG. It is formed so firmly and has sufficient air permeability on one side of the thick sheet layer, which is the primary plate, and has an E modulus much larger than 109 N / m 2, which is the same as the thin and solid plate, which is a very solid secondary plate. The barrier sheet material 2, which is the third plate, is attached to the other side of the thick sheet layer, which is the primary internal material, and is again used on the surface of the barrier plate 7, which is the plate material, on the surface of the thin plate which is the second plate. Only parts are configured to be attached.

But. In the sound absorbing plate having such a structure, first, since the structure of the sound absorbing plate is complicated, it cannot be easily manufactured, and there is a problem that the manufacturing cost is high. In addition, there is a problem that the sound absorbing effect is also not high compared to the manufacturing cost when it is broken in the construction step because the attachment material must be used for coupling between the structures.

In order to solve the above problems, the present inventors use various waste papers and wood pulp as raw materials, and mix the factories in the production or recycling process of newspaper paper, printing paper, and graft paper. It has been studied how to utilize waste by-products generated by mixing waste pulp sludge and waste ash as wastes.

In other words, various studies and reviews are actively conducted to efficiently treat and recycle waste ash that is generated as a by-product from waste ash contained in comprehensive paper waste generated in paper production process or paper recycling process. It is progressing, but it is difficult to directly recycle the waste ash contained in the paper waste or waste ash generated from the thermal power plant.

The comprehensive papermaking waste can be largely classified into waste ash and waste pulp mixture sludge, and the present invention will discuss waste ash.

The waste ash generated from the waste paper produced in the paper production process or the paper recycling process or the thermal power plant is minimized as much as possible, while minimizing the industrial waste pollution as much as possible. We are researching ways to recycle this as a useful resource. In particular, research on the manufacture of building materials for the purpose of recycling the paper waste is the most active situation.

The inventors of the present invention know that the waste ash component is present as a material having an inorganic ceramic powder component during the papermaking process or the regeneration process or researching a method of using the waste ash produced in the thermal power plant most effectively. In the case of manufacturing the sound absorbing plate using the present invention, the present inventors have developed the sound absorbing plate using the waste ash in view of the fact that the strength is improved and the constituent components of the fine porous product are effective in maintaining the shape.

Generally, the main components of the waste ash can be largely divided into SiO ₂ and Al ₂ O ₃ and TiO ₂ , but the waste ash which is the paper waste is different depending on the raw material characteristics of each plant. As a result of analyzing the waste ash components of the Jeonju plant of Hansol Paper Co., Ltd. into organic and inorganic materials, it was found that SiO ₂ and Al ₂ O ₃ were contained in a large amount. Analytical components of lung ash are shown in Tables 1 and 2 below.

Component Analysis of Lung Ash

The present invention was completed while examining the use as a building material based on the component analysis of the waste ash.

The SiO ₂ and Al ₂ O ₃ are inorganic powders as constituents, and the properties of the constituents are particularly strong, which enhances the strength of the material and maintains the form of the material. Since it is easy to maintain, it is suitable as a construction material of a building material, especially a sound absorption board.

The present invention has been made to solve the above various problems, an object of the present invention is to provide a foamed ceramic sound-absorbing plate and a method for producing the same using a waste ash, the structure is simple, easy construction by recycling the waste waste of industrial wastes have.

Still another object of the present invention is to provide a foamed ceramic sound absorbing plate using a waste ash capable of forming a porous type having excellent sound absorbing effect and a method of manufacturing the same.

Still another object of the present invention is to provide a foamed ceramic sound absorbing plate using waste ash, which is not easily broken during transportation, and a manufacturing method thereof.

Still another object of the present invention is to recycle waste ash, which is industrial waste generated during paper manufacturing or waste recycling, to reduce the amount of industrial waste, thereby preventing pollution of industrial waste, and using waste ash that contributes to preserving the environment. The present invention provides a foamed ceramic sound absorbing plate and a method of manufacturing the same.

Foamed ceramic sound-absorbing plate using waste ash according to the present invention is a micro-bubble irregularly distributed uniformly formed throughout the solid layer of a constant thickness consisting mainly of waste ash and cement generated as industrial waste in the paper manufacturing plant or thermal power plant. It is characterized by consisting of a composite panel which is integrally attached to one end surface of the foamed ceramic solid layer and the foamed ceramic solid layer.

In addition, the method for producing a foamed ceramic sound absorbing plate using the waste ash according to the present invention is mixed with cement 750 to 850 kg to 150 to 250 kg of waste ash containing a large amount of SiO ₂ and Al ₂ O ₃ powder, cement to this mixture The cement slurry was prepared by adding 0.35 to 0.45% by weight of water, and mixing the foaming agent diluted with 2 to 4% of solution, and adding compressed air at about 10 atmospheres to uniformly distribute the bubbles. The mixture is mixed with the cement slurry and vigorously stirred and mixed at high speed to bond the foamed ceramic solid layer to the composite panel.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

2 is a view showing the foamed ceramic sound-absorbing plate of the present invention.

2, the foamed ceramic sound absorbing plate using the waste ash of the present invention is integrally formed by foaming curing the foamed ceramic solid layer 12 made of waste ash and cement integrally formed on the composite panel 11. In addition, the microbubbles 13 are irregularly dispersed by the foaming agent so as to absorb sound in the foamed ceramic solid layer.

The foamed ceramic sound absorbing plate manufactured by the present invention has a bubble size of about 5 to 160 µm, and has been found to have a particularly effective sound absorption effect for low frequency sound and vibration, and is used for sound absorption and sound insulation of low frequency sound and vibration. It is particularly suitable as a sound insulation board and a soundproofing material such as a normal living environment, a music room and other spaces in which sound insulation is required.

The total thickness of the foamed ceramic sound absorbing plate using the waste ash of the present invention can be produced in about 5 cm, 7.5 cm, 10.0 cm, 12.5 cm, 15.0 cm, 5 to 10 cm is most preferred.

In addition, since the foamed ceramic sound absorbing plate using the waste ash prepared by the present invention is an inorganic powder particle of 5 μm to 100 μm in the form of the waste ash thereof, the foamed ceramic sound absorbing plate made of the foamed ceramic solid layer containing the same is elastic Because of this, it is excellent in impact resistance and resistant to deterioration and breakage, and thus has excellent durability. In addition, the foamed ceramic sound-absorbing plate produced by the present invention can be used as a building finishing material because it can be freely colored during manufacture, and also has a decorative effect on the interior. In addition, it is not only easy to nail, screwing, but also can be easily processed with a saw, etc. can make the construction work very easy.

Next, the manufacturing method of the foamed ceramic sound absorption board using the waste ash of this invention is demonstrated.

In the sound absorbing plate according to the present invention, 750 to 850 kg of cement is mixed with 150 to 250 kg of waste ash containing a large amount of SiO ₂ and Al ₂ O ₃ powder, and 0.35 to 0.45% by weight of water is added to the mixture. Add and mix again to prepare a cement slurry. The blowing agent diluted with 2 to 4% solution is mixed with the cement slurry with about 10 atm of compressed air in order to distribute the bubble dispersion evenly, and is stirred vigorously at high speed or mixed with an Omni mixer.

The resulting foamed ceramic slurry is coated and cured on the composite panel 11 with a predetermined thickness to laminate the foamed ceramic solid layer 12, and the total thickness of the composite panel 11 and the foamed ceramic solid layer 12 is 5 to 10. The foamed ceramic sound-absorbing plate of the present invention is manufactured to have a cm.

The sound absorbing plate of the present invention is foamed by using a method of mixing the blowing agent solution in water and injecting air into the diluted solution to foam the foam conditions are good, excellent foam stability, and the bubbles are uniformly dispersed in a constant size It became.

As the blowing agent, one of animal protein, amino sulfate, alcohol ether, aluminum powder, and zinc powder can be selected and used.

In general, the bubble size of the foamed ceramic solid layer of the sound absorbing plate is determined by the amount of foaming agent. In the present invention, the amount of foaming agent is mixed with 0.01-0.05% with respect to the amount of cement. It is preferable to make it to 0.3 liter (Liter). The bubble size of the foamed ceramic solid layer thus prepared was about 5 μm to 160 μm in diameter.

In order to facilitate dispersion of the foam to be foamed, it is necessary to stir the mixture of the blowing agent and the cement slurry at a high speed or mixed in an omnimixer.

The mixing ratio of the waste ash to cement is preferably (3-5): (15-17) by weight.

Since the ceramic sound-absorbing plate contains a large amount of SiO ₂ , bubbles generated by the SiO ₂ component are not deformed, are durable, and serve to maintain their shape and strength during curing.

In the above method, compressed air is used to evenly distribute the bubbles, and the pressure is most preferably about 10 atm, and when the pressure of the compressed air is high, the cell size is large, and the pressure of the compressed air is low. As the cell size becomes smaller, the indenter spacing becomes dense but when the pressure is too low, the bubble size becomes too fine, so it blocks high and high frequencies or vibrations, but does not absorb and dampen low and fine vibrations. It is only a cement composite plate, so the sound absorption and dustproofing effect is lowered.

In addition, according to the foamed ceramic sound absorbing plate using the far ash produced according to the present invention, since the waste ash component is an inorganic ceramic powder component, it has been found to have thermal insulation, heat resistance, moisture absorption, and fire resistance as building materials in addition to its function as a sound absorbing plate.

As described above, according to the foamed ceramic sound absorbing plate using the waste ash according to the present invention and a method for manufacturing the same, the sound absorbing plate is manufactured by recycling the waste ash, which is an industrial waste produced in the paper manufacturing process or the paper recycling process, In addition to preventing pollution, the structure is simple because the foaming agent is foamed with a mixture of waste ash and cement onto the composite panel while administering compressed air at about 10 atm, and then the foamed ceramic solid layer is integrally bonded. In addition, it is easy to carry, easy to install and at the same time very good sound absorption effect.

In the sound absorbing plate containing waste ash containing a large amount of SiO ₂ and Al ₂ O ₃ used in the present invention, instead of the waste ash, kaolin, silica fume, fly ash, mica, mica ), And a sound absorbing plate may be prepared by mixing one or more inorganic ceramic powders such as Talc and the like.

The composition of inorganic ceramic powders such as Kaolin, Silica Fume, Fly Ash, Mica, and Talc is shown in Table 3 to Table 7 below. It does not differ significantly from the composition of the main component.

Therefore, the object of the present invention can also be achieved by producing a sound absorbing plate using powder in which one or more of these materials are mixed.

Claims (6)

It contains a large amount of SiO ₂ and Al ₂ O ₃ powder, 150-250 ㎏ of inorganic ceramic powder with a powder size of 5㎛-100㎛, 750-850 ㎏ of cement, and a blowing agent were mixed to form a uniform dispersion of fine bubbles Foamed ceramic solid layer; And a composite panel integrally attached to one end surface of the foamed ceramic solid layer. The foamed ceramic sound absorbing plate according to claim 1, wherein the foamed volume of the foamed ceramic solid layer is 0.1 to 0.3 liters per 1m 3 of the product volume, and the size of the foam is 5 µm to 160 µm. According to claim 1, The foamed ceramic sound-absorbing plate, characterized in that the total thickness of the foamed ceramic solid layer and the composite panel is 5 to 10cm. The method of claim 1, wherein the inorganic ceramic powder is an industrial waste, characterized in that one or two or more mixtures in the group consisting of waste ash, kaolin, silk chira fume, fly ash, mica and talc generated in a paper mill or thermal power plant. Foam ceramic sound absorption board. Mixing 750-850 kg of cement with 150-250 kg of inorganic powder ceramic; Preparing a slurry by kneading the mixture by adding 0.35-0.45% by weight of water; A blowing agent diluted with 2-4% solution is mixed into the slurry while putting compressed air at about 10 atm; Stirring the slurry mixed with the blowing agent at high speed to form a foamed ceramic slurry; And forming a foamed ceramic solid layer by coating the foamed ceramic slurry on a composite panel and stacking the foamed ceramic slurry. The method of claim 5, wherein the blowing agent is one selected from animal protein, amino sulfate, alcohol ether, aluminum powder.