KR100414149B1 - Manufacturing method of Photocatalytic action clay brick - Google Patents

Abstract

The present invention purifies nitrogen oxides (N0x) by decomposing harmful substances around when exposed to sunlight, which is a characteristic of ultrafine titanium dioxide (TiO ₂ ), a new material, and sterilization, antibacterial, deodorization efficacy and pollution The present invention relates to a method of manufacturing clay bricks made of environmentally friendly building bricks and floor bricks by mixing titanium dioxide (TiO ₂ ), a photocatalytic material having an effect of decomposing substances and blocking ultraviolet rays, from main materials of clay products.

In other words, 90-98% of the main raw material of clay products contains 2-10% by weight of titanium dioxide (TiO ₂ ), a photocatalyst, and 90-98% of the main raw materials of clay brick The powder of powder of titanium dioxide (TiO ₂ ), a photocatalytic material, was added and mixed in a 2-10% neutral ratio, and then molded in a vacuum injection molding machine, dried at a temperature of 50 to 100 ° C. for 50 to 60 hours, and then at a temperature of 1100 to 1160 ° C. This is a method for producing a clay brick which has a photocatalytic effect obtained by preheating and plastic cooling for 30 to 40 hours.

Description

Manufacturing method of photocatalytic action clay brick

The present invention purifies nitrogen oxides (N0x) by decomposing harmful substances around when exposed to sunlight, which is a characteristic of ultrafine titanium dioxide (TiO ₂ ), a new material, and sterilization, antibacterial, deodorization efficacy and pollution The present invention relates to a method of manufacturing clay bricks made of environmentally friendly building bricks and floor bricks by mixing titanium dioxide (TiO ₂ ), a photocatalytic material having an effect of decomposing substances and blocking ultraviolet rays, from main materials of clay products.

In general, nitrogen oxides (NOx), a major source of emissions from many automobiles, react with hydrocarbons in the atmosphere to cause photochemical smog or cause acid rain. Is the main cause of major air pollution.

In particular, NO ₂ in nitrogen oxides (NOx) is a dangerous component and it is known to cause death of life and respiratory failure even at low concentrations between 0.05 ppm and 0.02 ppm. Photocatalytic reactions, along with hydrocarbons, are better known to cause smog, the most serious problem in large cities.

In addition, most of the NOx is present as NO in the high-temperature exhaust gas because the NO is in a relatively stable state at a high temperature, and easily oxidizes to No ₂ at room temperature, which is a direct cause of pollution.

The method of purifying air pollution by NOx may be immobilization or neutralization of NOx using photocatalytic action, and photocatalytic reacts with solar energy to NOX. And by using the principle of oxidizing and removing the air pollutants by the organic chlorine compounds in the production of clay and floor bricks by adding a photocatalytic material to produce a product that purifies the nitrogen oxides (N0x) as described above It aims to reduce any pollution caused by environmental pollution.

Accordingly, the present inventors have repeatedly conducted a number of tests and studies to add a certain amount of photocatalytic material to the possession of clay products so that building bricks and floor bricks can also function as a harmful gas purifying by the photocatalytic reaction.

As a result, if the photocatalytic material of titanium dioxide (Tio ₂ , Anatase) is used in clay and silica sand (Visible soil) or kaolin, which are intended to be used for building bricks and floor bricks, clay and The combination of elements such as Fe ₂ o ₂ , Al2o3, Cao, and Mgo in silica sand or kaolin component, promotes the reaction when natural color generation and solar energy (heat) are in contact, thus acting as photocatalytic. Found out.

In addition, photocatalysts include TiO ₂ , ZNO, Nd ₂ O ₅ , WO 3, SnO ₂ , ZrO ₂ , Ru ²⁺ , CdS, and ZnS. These photocatalytics are caused by the movement of electrons when subjected to ultraviolet rays in sunlight. The electrons and majors react with the surrounding oxygen, hydrogen, or OH, and the produced materials have strong oxidizing power and have the ability to decompose harmful gases in the room. Among them, titanium dioxide (TiO ₂ , Anstase) ) Oxidizes and decomposes organic pollutants in the air and water into harmless substances.It has chemical stability that does not corrode in acid and base organic solvents.It is not addictive and carcinogenic unlike other photocatalytics. It is also found that it is not included.

Therefore, the present invention adds a photocatalytic material to building bricks and floor bricks, and the color is different from brick's unique color due to the change of elemental bond between iron oxide (Fe ₂ O ₃ ) and photocatalytic material included in the brick material. By providing environmentally friendly building bricks and floor bricks such as color development and decomposition of pollution gas and organic matter, it is intended to give environmental improvement effect and the function to purify environmental pollution to the material itself.

In the present invention, a small amount of titanium dioxide (TiO ₂ , Anatase), a photocatalytic material, is added to a product manufacturing process and mixed, followed by molding, drying, and firing to purify colored and nitrogen oxides (NOx). Clay bricks made of building bricks and floor bricks having the effect of making, and a method of manufacturing the same.

The photocatalyst (Photocatalytic) to be used in the present invention has selected the nature of many photocatalyst (Photocatalytic) I but photolysis effect is highest, and titanium dioxide, the higher the specific gravity is easy to use (TiO ₂₎ of the main products, building blocks and the bottom bricks .

* Photodecomposition of Titanium Dioxide (TiO ₂ , Anatase)

* Manufacturing method of titanium dioxide (TiO ₂ ), a photocatalytic agent

Although the present invention will be described in detail with respect to the manufacturing process of building bricks and floor bricks varying the mixing ratio of photocatalytic titanium dioxide (TiO ₂ ) as the main material, the technical scope of the present invention is limited to the embodiment of the manufacturing process It is not.

In addition, in the present invention, the quality of titanium dioxide (TiO ₂ ) which is a photocatalytic agent used is as follows.

* Unit particle diagram of titanium dioxide (TiO ₂ )

<Example>

After mixing and crushing 90 ~ 98% of the main raw materials of clay products, which are blended and ground for building bricks and floor bricks, powder of titanium dioxide (TiO ₂ ), a photocatalytic agent, is added and mixed at a weight ratio of 2-10%. It is made with a vacuum injection molding machine with a content of 19 ± 2%, and the molded object is dried for 50 to 60 hours at 50 to 100 ° C, then preheated, calcined and cooled at 800 to 1160 ° C for decomposition of colored and polluting gases and organic matter. Produce building bricks and floor bricks with photocatalytic effect.

Comparative Example

After drying the molded object at 50 ~ 100 ℃ for 50 ~ 60 hours by molding with vacuum injection machine with 19 ± 2% of moisture without adding photocatalytic agent to the mixed and crushed raw materials for building brick and floor brick It is preheated, fired and cooled at 800 to 1160 ° C for 30 to 45 hours to produce red bricks and floor bricks.

- Test Methods -

Experimental method for reducing NOx concentration

For the present invention, since there is no test for reducing the concentration of nitrogen oxides (NOx), a closed nitrogen oxide (NOx) treatment device was devised and manufactured to measure the concentration reduction of nitrogen oxides (NOx).

The experimental device installed UV lamp for light effect inside the sealed stainless steel container (box type), configured the hydraulic system and the valve device to control the flow of gas, and the device of the closed NOx treatment device. Is as follows.

* Sealed NOx Treatment System

The test results are shown in the following table.

* Percentage of nitrogen oxide (NOx) gas (%)

In the above table, it can be seen that the concentration of nitrogen oxides (NOx) according to the difference between the example and the comparative example is reduced in the concentration of nitrogen oxides (NOx) according to the blending content (%) of the photocatalytic agent in the examples. It can be seen that there is no decrease in the concentration of nitrogen oxides (NOx) due to the uncatalyzed photocatalytic agent and the NOx concentration decrease by the% of the photocatalytic agent is as follows.

*% Of residual to initial NOx concentration

-Test Method 2-

Absorption rate, compressive strength, flexural strength

The absorbance and compressive strength tests of the building bricks and the floor bricks of the examples were tested according to the Korean Industrial Standard KSL 4201, and the flexural strength of the floor stones of the examples were tested according to the Korean Industrial Standard KSF 4419.

The test results are shown in the following table.

As a result of the difference between the examples and the comparative examples in the above table, the absorption rate and the compressive strength are not different from the bricks and the floor bricks of the comparative example, but the flexural strength is increased by more than 30%. You can see.

(A) Absorption rate

* How to operate

① The sample is dried in an air bath at 110 ± 5 ° C for 24 hours, cooled to room temperature, and weighed, and then weighed to dry weight m ₁ (g).

② Stop this sample in water at 20 ± 5 ℃ for 24 hours. The distance between the upper part of the sample and the surface of water is 50 to 60 mm

③ Take this out of water and quickly wipe the surface moisture with a damp cloth. Weigh immediately and make it m ₂ (g) including water.

* Calculation

Absorption rate is calculated according to the following formula and concludes at the first place after the decimal point according to KS A 0021.

a = m ₁ / m ₂ × 100

So far a: Absorption rate (%)

m ₁ : dry weight (g)

m ₂ : Weight including water (g)

(B) compressive strength

* How to operate

The sample is taken out in an air bath at 110 ± 5 ° C. in advance after 24 hours and allowed to cool at room temperature.

A 190 x 90 mm face of the brick is used as the pressing surface, and the pressing area A (m ³ ) including the opening for each sample is obtained. If necessary, press a piece of paper or the like to apply pressure evenly.

The pressurization rate is set at 49-98.1 Ncm ³ {5-10 kgf / m ³ } per second, and the maximum load WN {kgf} when the sample is destroyed is measured.

* Calculation

Compressive strength shall be calculated according to the following formula and reported by ending with an integer number according to KS A 0021.

C = A / w

C = compressive strength

A = pressure area

W = maximum load

(C) flexural strength

* How to operate

The deflection test is performed immediately after removal of the sample in water for 24 hours. Take a distance of 140 mm between the points of the sample and apply a load to the center of the points. At this time, pressurization speed is applied to high speed up to about 50% of failure load, and then the maximum load P indicated in the tester is measured by applying a load such that the increase in maximum bending compression capacity does not exceed 9.8 N / mm ³ per minute. Calculate the flexural strength according to (1).

* Calculation

Flexural Strength (N / mm ³ ) = 3Pl / 2bd ²

Where P: Maximum breaking load indicated by the sampler (N)

l: Distance between points (mm)

b: average width of the earth's crust between points (mm)

d: average weight of floor brick (mm)

<Remarks>

① There is no problem even if the load is distributed evenly by inserting a rubber plate or other similar material on the pressing surface and the supporting surface of the sample.

② The sample shall be tested as it is in a block shape, but shall be pressurized at right angles to the center where the center point is connected to both ends of the block.

③ If the flexural strength test is impossible as it is in the form of a block, cut the sample into 200 × 60 × 60mm and measure the dimensions of the sample.

④ If the sample cannot be cut to the size of 200 × 60 × 60mm, it can be cut and tested to the smaller size.

⑤ For the measurement of the pressure cross section before the bending test, the butterfly is measured at two places above and below the longitudinal line in the longitudinal direction, and the thickness is measured at two places within one quarter at both ends of the longitudinal direction.

⑥ In case of testing by using the conventional unit tester or measuring instrument, the numerical conversion by S1 is as follows.

1kgf = 9.80N

Thus, the present invention purifies nitrogen oxide (N0x), which is the main cause of air pollution by photocatalytic action, decomposes organic matters, and is an environmentally friendly building brick that has the effect and effect of UV protection as well as sterilization, antibacterial and deodorization. And it provides a floor brick and the product of the color development (orange → the amount of aging series) other than the unique color of the brick.

In addition, it can be applied to tiles, blocks, tiles, panels, etc., which are clay-related products, and thus belongs to the right category of the present invention. The technology will be improved by building materials with environmentally friendly photocatalytic action.

Claims (3)

(delete) The powder of titanium dioxide (TiO ₂ ), a photocatalytic material, is added and mixed in 2-10% neutral ratio after mixing 90 ~ 98% of the main raw material of clay products, and then it is formed by vacuum injection molding machine for 50 ~ 60 hours. Method of producing clay bricks which act as a photocatalyst after drying and preheating and plastic cooling at a temperature of 1100 to 1160 ° C for 30 to 40 hours (delete)