JP2002274972A - Charcoal-ceramic body and method of producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charcoal-ceramic body which has a high capacity to absorb water and is capable of enhancing antibacterial effects, deodorant effects, harmful gas adsorption, and air permeability of charcoal itself, and to provide a method of producing the same. SOLUTION: A method of producing the charcoal-ceramic body comprises incorporating a wood flour into clay or an ocherous powder in an amount of 5 to 70 wt.% based on the amount of the clay or the ocherous powder, then adding water to the resulting mixture, kneading, forming, sufficiently drying the formed body and firing the dried formed body at 250 to 1,000 deg.C in a closed vessel or a vacuum vessel. The wood flour is carbonized and remains in the charcoal-ceramic body, thereby the effects of the charcoal can be obtained, and the charcoal-ceramic body in which the components and nutrients of the earth are contained as they are is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon ceramic body and a method for producing the same. By baking in a container or vacuum container, wood powder is carbonized in the molded body and remains in the form of charcoal, not only has excellent water absorption such as water, but also has antibacterial and deodorizing effects of charcoal itself. The present invention relates to a carbon ceramic body capable of greatly increasing toxic gas adsorption capacity and gas permeability, and a method for producing the same.

[0002]

2. Description of the Related Art In general, charcoal, also called activated carbon, has excellent water absorption, moisture absorption, air permeability, deodorizing effect, antibacterial effect and ability to adsorb harmful gas, and has already been proved through various studies. As a result, it is widely applied to environmental fields such as an activated carbon adsorption column for removing organic substances and bad odors, and to daily necessities such as water purification filters and air filters. However, at present, only granular activated carbon, powdered activated carbon or charcoal lump is mainly used, and it has not yet been used in various forms.

[0003] In order to solve such a disadvantage, a crushed charcoal or charcoal powder can be mixed with an organic adhesive to form various shapes.
The breathability, deodorizing effect, antibacterial effect, ability to adsorb harmful gas, etc. are greatly reduced, and the function cannot be exhibited as it is.

[0004] In particular, a ceramic body excellent in water absorption, air permeability, and water drainage is suitable for use as a column for a medium such as a column in which plants can easily grow. It has disadvantages such as poor water absorption, air permeability, and poor drainage.

[0005] Such a method for producing a side stone has been widely known through a number of patents and utility models, and has been disclosed in Korean Published Patent Application No. 1996-29270 (1996.8.1).
7), Korean Published Patent Application No. 1996-29278 (1).
996.8.17) and Korean Published Patent Application No. 1997-7.
No. 3313 (Dec. 10, 1997) discloses a method for producing a column stone, and is disclosed in Japanese Patent Application Laid-Open No. 7-17760 (199).
5.1.20) discloses a method for producing a ceramic body having strength and water resistance which can be used as a building material by using fly ash as a main raw material. However, such a known technique may be excellent in water absorption and air permeability because it is not a ceramic material containing charcoal, but has disadvantages such as low antibacterial effect, deodorizing effect, and ability to adsorb harmful gas.

[0006] Usually, ceramic materials having excellent moisture absorption and air permeability, antibacterial effect, deodorizing effect, and ability to adsorb harmful gas are used for producing building blocks and tiles as required in addition to side stones. Can be used.

[0007] Therefore, moisture absorption and air permeability, antibacterial effect,
There has been a continuous demand for ceramic bodies having excellent deodorizing effects and toxic gas adsorbing ability, and research on them has been continued.

[0008]

Therefore, in the present invention,
It was made in order to solve the above problems, the purpose of which is to leave the soil components and nutrients such as clay and loess as they are, and the wood powder is carbonized and remains in the form of charcoal, Not only is it excellent in water absorption etc.,
An object of the present invention is to provide a charcoal ceramic body capable of greatly increasing the antibacterial effect, deodorizing effect, harmful gas adsorption capacity, and gas permeability of charcoal itself, and a method for producing the same.

It is another object of the present invention to provide a carbon ceramic body which can be formed in various forms and a method for producing the same.

[0010]

In order to achieve the above object, a method for producing a carbon ceramic body according to the present invention comprises the steps of: providing clay or loess powder with wood flour; %, Mixed with water, kneaded and molded, dried sufficiently, and then fired at a firing temperature of 250 to 1,000 ° C. in a sealed container or a vacuum container. And At this time, the firing temperature is 2
It is preferable to be in the range of 50 to 600 ° C.

In addition, when wood powder is mixed with clay or loess powder, 1 wt.
About 10 to 10%, or add zeolite powder to
It is characterized by adding 30%.

Hereinafter, the carbon ceramic body and the method for producing the same according to the present invention will be described in detail.

In the method for producing a carbon ceramic body according to the present invention, a predetermined amount of wood flour is basically mixed with an inorganic binder such as clay or loess, pressed into a molded article having a predetermined shape, and dried sufficiently. After that, the molded body is fired in a sealed container or a container in a vacuum state to produce a carbon ceramic body.

To explain this in more detail, first, clay or loess having excellent viscosity is collected and crushed to obtain a fine powder, and wood powder is crushed to prepare a 20 mesh (mesh).
Sift with the above sieve. If the size of the wood flour is too large, the strength of the calcined carbon ceramic body will be reduced.
Preferably, the mesh size is 20 mesh or more. Wood flour is mixed well with the clay or ocher powder prepared in this way and mixed.
Water is added and kneaded, and at this time, it is preferable to mix wood powder of 5 to 70% by weight with respect to clay or loess.
The wood flour is preferably sawdust.

In order to increase the compressive strength and density of the carbon ceramic body of the present invention and to slightly lower the water absorption in the mixing ratio of the wood flour to the clay or loess, the amount of the wood flour is reduced. It is not necessary to increase the compressive strength and density of the carbon ceramic body, and it is preferable to increase the amount of wood flour in order to increase the water absorption. If the weight ratio of the wood flour is more than 70%, there is a problem that the strength of the carbon ceramic body is reduced and the carbon ceramic body is easily broken.

The mixture kneaded as described above is formed into a desired shape, and after sufficiently dried, the formed product is placed in a sealed container or a container in a vacuum state for 250 to 1,000.
Bake at ℃ for 10 minutes to 2 hours. By doing so, the wood flour powder contained in the compact is carbonized and remains in the form of charcoal inside the compact.

Wood flour starts to carbonize at 250 ° C.
Up to 000 ° C., soil components and nutrients can be maintained as they are. If fired at a temperature higher than 1,000 ° C., the ceramic body is magnetized and loses porosity.

The firing time varies depending on the performance of the furnace.
It takes about 10 minutes to heat and carbonize at 250 ° C., and about 2 hours to heat and carbonize at 1,000 ° C. This is because the higher the firing temperature, the longer it takes to raise the temperature to the firing temperature. As described above, the sintering temperature and the sintering time maintain a somewhat proportional relationship therebetween, but a sintering temperature and a sintering time that are modified depending on the use of the final product can be applied. That is, any firing conditions can be applied within the above-described firing temperature range and firing time range.

In particular, when a ceramic body containing soil components and nutrients as they are, such as a side stone, is required, it is preferable to perform firing at a firing temperature in the range of 250 to 650 ° C. That is, it is important to prevent the soil components and nutrients from being destroyed by firing at a temperature lower than the general firing temperature range.

On the other hand, when wood powder is mixed with clay or loess powder in order to radiate a large amount of far-infrared rays useful to the human body in the final product, about 1 to 10% of barite powder is added in a weight ratio to clay or loess. Mixing or mixing 5 to 30% of a zeolite powder as another additive can produce a molded article having a good water absorption and allowing water to leak slowly.

As mentioned above, according to the method for producing a carbon ceramic body according to the present invention, the wood flour mixed during kneading and occupying a certain space inside the molded body is converted into a closed container or a vacuum state. By carbonizing as charcoal when fired in a container, the water absorption, air permeability, and adsorption capacity are increased by many pores in the charcoal.

[0022]

EXAMPLES Various examples and comparative examples of the method for manufacturing a carbon ceramic body according to the present invention will be described below.
In the examples, the firing time includes a time for raising the temperature to the firing temperature.

[Example 1] Wood flour 200 in 1000 g of clay
g, water is added and kneaded, and the kneaded mixture is poured into a rectangular parallelepiped mold and compression-molded. After the compression molded body is sufficiently dried, it is fired in a sealed container at a firing temperature of 500 ° C. for about 30 minutes. Table 1 shows the physical property values of the carbon ceramic bodies manufactured as described above.

[Examples 2 to 3] Examples 2 to 3 were the same as the conditions of Example 1 except that the amounts of wood flour to clay were 300 g and 500 g, respectively. Are shown in Table 1.

Example 4 Wood flour 400 in 1000 g of clay
g, water is added and kneaded, and the kneaded mixture is poured into a rectangular parallelepiped mold and compression-molded. After the compression-molded compact has been sufficiently dried, the compact is fired in a closed container at a firing temperature of 250 ° C. for about 30 minutes. Table 1 shows the physical property values of the carbon ceramic bodies manufactured as described above.

Embodiments 5 to 11 Embodiments 5 to 11
The firing temperature was increased by 50 ° C by 300 ° C,
The conditions were the same as in Example 4 except that the temperature was changed to 50 ° C., 400 ° C., 450 ° C., 500 ° C., 550 ° C., and 600 ° C., and the physical properties thereof are shown in Table 1.

[Examples 12 and 13] In Examples 12 and 13, the firing temperatures were 650 ° C. and 700 ° C., respectively.
Except that the baking time was set to 40 minutes, the conditions were the same as those in Example 4, and the physical property values thereof are shown in Table 1.

Example 14 Example 14 was the same as the conditions of Example 4 except that the firing temperature was 750 ° C. and the firing time was 50 minutes. Is shown in

Example 15 Example 15 was the same as Example 4 except that the firing temperature was set to 800 ° C. and the firing time was set to 55 minutes. Is shown in

Example 16 Wood flour 20 in 1000 g of clay
0 g is mixed, water is added and kneaded, and the kneaded mixture is poured into a rectangular parallelepiped mold and compression-molded. After the compression-molded compact is sufficiently dried, the compact is fired in a closed container at a firing temperature of 450 ° C. for about 30 minutes. Table 2 shows the physical property values of the carbon ceramic bodies manufactured as described above.

Embodiments 17 to 20 Embodiments 17 to 20
Is to increase the firing temperature by 50 ° C.
C., 550.degree. C., 600.degree. C., and 650.degree. C., except that the conditions were the same as those in Example 16, and the physical properties thereof are shown in Table 2.

[Comparative Examples 1 and 2] Comparative Examples 1 and 2 are a red column and a gray column manufactured and sold in Korea, respectively, and the physical properties thereof are shown in Table 3.

[Comparative Examples 3 and 4] Comparative Examples 3 and 4 are a column of Japanese volcanic stone and a column of Japanese red volcanic stone manufactured and marketed in Japan, respectively. The values are shown in Table 3.

[0034]

[Table 1] Physical properties of charcoal ceramic body consisting of clay and wood flour * Water absorption = (weight of absorbed water × 100) / weight of dried charcoal ceramic body

Examples 1 to 3 show the physical property values of the carbon ceramic body based on the weight ratio of wood flour to clay when the sintering temperature is 500 ° C. It can be seen that the pH is high and the density is low.

Examples 4 to 15 show the physical property values of the carbon ceramic body depending on the firing temperature when the weight ratio of wood powder to clay is 40%. It can be seen that the water absorption is high and the density is low, but above that, it is almost constant, and the pH increases as the firing temperature increases.

[0037]

[Table 2] Physical properties of charcoal ceramic body when the weight ratio of wood flour to loess is 20%

Table 2 shows the physical properties of the carbon ceramic body when the weight ratio of wood flour to loess is 20%. There is almost no difference in water absorption, pH and density depending on the firing temperature. I understand.

[0039]

[Table 3] Physical property values of existing commercially available side stones

As shown in Tables 1 to 3, it is assumed that a charcoal ceramic body made by mixing wood flour with clay or loess is used as a charcoal column, and the charcoal ceramic body of the present invention and Table 3 are used.
Comparing the physical properties of the existing column with a commercially available column, the carbon ceramic body of the present invention has a much larger water absorption than the red and gray columns of Comparative Examples 1 and 2 and a smaller density. It can be seen that the weight is light and the water absorption is higher and the density is almost the same as that of the volcanic stone spar of Japanese Comparative Examples 3 and 4. Therefore, the charcoal ceramic body manufactured by the manufacturing method according to the present invention has good water absorption and water drainage and is light, and cultivates plants such as field grasses due to the antibacterial effect of charcoal and the components and nutrients of living soil. The demand for high-grade handrails should increase.

In Table 4 below, soil in each region where the column grows in Korea is sampled and its pH is tested.

[0042]

[Table 4] Column pH of soil

Comparing Table 4 with Tables 1 and 2, the acidity of the soil of the column is in the range of 4.73 to 7.30, which is the range most suitable for the growth of the column. It is determined that the carbon ceramic body of the present invention must be fired at 400 ° C. or higher in order to have an acidity within the range.

Thus, the carbon ceramic body according to the present invention
It is porous and has good water absorption and drainage, low density and light weight.Because of the antibacterial effect of charcoal and the components and nutrients of living soil, it can be used as a stone for cultivating plants such as grasses. It turns out that it is very excellent.

On the other hand, since the carbon ceramic body of the present invention has good water absorption and air permeability, it can be used for any application requiring such a material. In other words, charcoal has a high deodorizing effect and the ability to adsorb harmful gases, and the antibacterial effect of charcoal
It is very highly used as building materials such as building tiles and blocks in addition to charcoal stairs.

As mentioned above, the carbon ceramic body of the present invention is closed or vacuum fired at a low temperature, so that soil components and nutrients are alive, and wood flour is carbonized and remains inside the ceramic body as it is. It is excellent in the antibacterial effect, deodorizing effect and harmful gas adsorption ability of charcoal, excellent in hygroscopicity and water absorption, and can be used as a building material and a side stone.

On the other hand, the above description has been made with reference to the preferred embodiments of the present invention. However, those having ordinary knowledge in the relevant technical field may use the present invention described in the appended claims. It is understood that the present invention can be variously modified and modified without departing from the spirit and scope.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Choi Sangoogu, Republic of Korea, Busan, Haeundaeeg, Jabadong 1288, Daedongtown 509-1102 (72) Inventor Lee Sabundoo Republic of Korea, Busan, Guiyanggan, Igbanggu Myeon, Changbangbanguri 194

Claims (5)

[Claims] 1. A mixture of wood powder and clay or loess powder in a weight ratio of 5 to 70% with respect to clay or loess, water, kneading and shaping, and drying. Baking at a firing temperature of 250 to 1,000 ° C. in a container or a vacuum container. 2. The method according to claim 1, wherein the sintering temperature is in a range of 250 to 600 ° C. 3. When wood powder is mixed with clay or loess powder, 1 to 10 wt.
%. The method for producing a carbon ceramic body according to claim 1, wherein the amount is about 0.1%. 4. When wood powder is mixed with clay or loess powder, zeolite powder is further added in a weight ratio of 5 to clay or loess.
The method for producing a carbon ceramic body according to claim 1, wherein 30% is added. 5. A carbon ceramic body manufactured by the method according to claim 1.