KR101930299B1 - Colored brick composition using maganese coloring agent and method for producing colored bricks - Google Patents

Abstract

The present invention relates to a colored brick composition using a coloring agent containing manganese as a main ingredient and a method for manufacturing colored bricks. The colored brick composition comprises: (a) 100 parts by weight of a main material selected from soil, granite soil, and a mixture thereof; and (b) 0.5 to 2.0 parts by weight of a coloring agent containing 65 to 70 parts by weight of manganese dioxide (MnO_2), 40 to 45 parts by weight of manganese (Mn), 6 to 8 parts by weight of iron (Fe), and 6 to 8 parts by weight of silicon dioxide (SiO_2). According to the present invention, it is possible to obtain a colored clay brick having various colors and good quality by using only a coloring agent of a specific composition containing manganese as a main ingredient and by controlling content of the coloring agent within a range of 0.5 to 2.0 parts by weight, and to obtain an economical colored clay brick with reduced production costs by reducing a firing temperature to 1,110°C or less.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a colored brick composition using a coloring agent containing manganese as a main component and a method for producing colored bricks,

The present invention relates to a colored brick composition using a coloring agent containing manganese as a main component and a method for producing colored bricks. More particularly, the present invention relates to a colored brick composition using manganese as a main component, The present invention relates to a colored brick composition and a method for producing the colored brick.

Bricks are mainly classified into clay bricks, cement bricks, and cement blocks that are larger than cement bricks.

Clay bricks are clay based materials that are baked at high temperature. They are usually classified as brick, brick, refractory brick, or fireproof brick depending on the material and firing conditions and applications. Since clay bricks are the main raw material, they have many functions such as insulation, moisture control, and emission of far-infrared rays, and thus they are often used as finish materials for the outer walls and inner walls of houses.

However, the color of clay brick varies depending on the raw materials, but the width of the change is not so large, and most of them are monotonous. Therefore, many studies have been conducted to introduce various colors desired to bricks.

Korean Patent Registration No. 10-1138425 discloses a method for producing a clay brick mold, which comprises adding a compound selected from the group consisting of sodium nitrate, borax, sodium triphosphate, cobalt chloride hexahydrate, ferrous chloride hexahydrate, potassium dichromate, potassium chromate, Or a method of forming a surface coating layer by applying an aqueous solution or mixture of two or more kinds of coloring materials is disclosed.

Korean Patent Registration No. 10-1145174 discloses a method for producing bright colored bricks by using at least one coloring powder selected from zirconium silicate and aluminum oxide.

Korean Patent Registration No. 10-0405063 discloses a method of mixing 1 to 5 wt% of a raw material with a coloring material having a particle size of 1 to 5 mm selected from manganese, titanium, and chromium mixed with a brick raw material obtained by mixing clay and viscous soil, To thereby produce a colored brick for construction.

However, most of the above-mentioned methods have a problem that the production costs of bricks are largely increased, the color development does not vary, and a separate process is required in most cases, which leads to a problem that the production process becomes long and complicated.

On the other hand, soil and sand are classified into soil and construction wastes generated from construction work. The gypsum generated in the construction work is collected during construction of mountain clearing, site construction, and photovoltaic foundation. Sand, and gravel that do not contain the construction waste of the natural state.

The clay bricks are produced by using the clay brick as a main component, and the quality of the product is poor. Therefore, they are mixed with other clay materials in a small amount even when they are used. One of the great advantages of using gypsum is cost reduction, but it is difficult to achieve a cost reduction effect when used in small quantities.

Masato is a weathered residue of granitic rocks formed by weathering of granite. It is also called "Hwajangdo". It is common for granite to be a main rock but also to include crystalline granitic rock (granodiorite) and gneiss. The components are quartz, feldspar, and colored minerals. They vary in size depending on the type, but their grains are thick and well-drained. Masato alone is low in plasticity and is used in clay bricks when mixed with other clay materials in small quantities.

Korean Patent Registration No. 10-1138425 Korean Patent Registration No. 10-0136939 Korean Patent Registration No. 10-0912673 Korean Patent Registration No. 10-1145174 Korean Patent Registration No. 10-1245834 Korean Patent Registration No. 10-1510825 Korean Patent Publication No. 10-2003-0063954 Korean Patent Registration No. 10-0769938 Korean Patent Registration No. 10-1198741 Korean Patent Publication No. 10-2011-0098873

The present invention relates to a colored brick composition and a method for producing colored bricks which can obtain bricks of various colors at a low firing temperature by using a coloring agent mainly composed of manganese, The purpose is to provide.

In order to achieve the above object, in the present invention,

(a) from 50 to 100% by weight of a raw material selected from earths, marc and mixtures thereof; Based on 100 parts by weight of a brick material composed of 0 to 50% by weight of an additive selected from at least one of clay, clay, kaolin,

(b) 0.5 to 2 parts by weight of a coloring composition for coloring and tacking. At this time, the coloring agent is manganese dioxide (MnO ₂₎ 65 ~ 70 parts by weight, manganese (Mn) colorant containing 40 to 45 parts by weight, iron (Fe) 6 ~ 8 parts by weight of silicon dioxide (SiO ₂₎ 6 ~ 8 parts by weight of a 0.5 To 2.0 parts by weight.
Further, in the present invention,

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(a) 50 to 100% by weight of a main raw material pulverized to a particle size of 25 mesh or less, selected from at least one of earths and matsato; (B) 0.5 to 2 parts by weight of a coloring composition for coloring and tackiness is blended with 100 parts by weight of a brick material composed of at least one kind of additive selected from at least one selected from the group consisting of clay, clay, kaolin and kaolin to prepare a colored brick composition, the coloring composition containing the manganese dioxide (MnO ₂₎ 65 ~ 70 parts by weight, manganese (Mn) 40 ~ 45 parts by weight, iron (Fe) 6 ~ 8 parts by weight of silicon dioxide (SiO ₂₎ 6 ~ 8 parts by weight, the coloring Preparing a brick composition,

Molding the brick composition to produce a molded product,

Drying the molded article at 35 to 95 DEG C for 65 to 75 hours, and

And calcining the dried shaped material at 700 to 1,110 캜 for 14 to 21 hours.

It is preferable that the sand and moss are crushed to a particle size of 25 mesh (0.71 mm) or less.

The gravel-

Aging soil from the construction site for 6 months or more in the open air;

Crushing the primary aged soil to a particle size of 25 mesh (0.71 mm) or less; And

And then aging the ground gypsum in a silo for 20 to 40 days.

It is preferable that the mixture of the gypsum and the mica is a mixture of the gypsum and the mica in a weight ratio of 1: 2 to 2: 1.

The colorant preferably has a particle size of 140 mesh (0.106 mm) or less.

The present invention relates to a method for producing a colored clay, which comprises predominantly gypsum or martha, a specific coloring agent containing manganese as a main component, and a coloring agent in a range of 0.5 to 2.0 parts by weight per 100 parts by weight of the main raw material, Bricks can be obtained.

In addition, it is possible to obtain fine colored clay bricks having excellent compression strength, bending strength and water absorption ratio, without using any other additive besides the coloring agent mainly composed of moss and earth or sandstone as the main raw material.

Further, according to the present invention, since the firing temperature at the time of producing clay bricks can be lowered to 1,110 占 폚 or less by using a coloring agent containing manganese as a main component, economical colored clay bricks can be obtained which are reduced to a production cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a photograph of a brick produced in Examples 1 to 4. FIG.
2 is a photograph of the bricks produced in Comparative Examples 1 and 2.
3 is a photograph of bricks produced in Examples 5 to 8;
4 is a photograph of the bricks produced in Comparative Examples 3 and 4.

The colored brick composition of the present invention comprises: (a) a raw material selected from at least one selected from the group consisting of sand and earth; And 0.5 to 2 parts by weight of a coloring composition for coloring and tackiness, based on 100 parts by weight of a brick material composed of 0 to 50% by weight of an additive. Each will be described in detail below.

Main ingredient

As the main material of the present invention, soil, marathon, or a mixture thereof is used. In the case of using a mixture of Tosa and Masato, it is preferable to mix the Tosa and the Masato in a weight ratio of 1: 2 to 2: 1, and it is more preferable to use them in a weight ratio of 1: 1.

The gypsum is mostly pink, and in the case of Masato, it has a light color, so you can adjust the color of the brick by mixing them.

1. Tosa

Tosaro uses 'soil from the construction site'. 'Soil generated at the construction site' is defined as natural soil, sand or gravel which does not include construction waste such as concrete, which is generated in the construction of mountain clearing, site construction, and sunlight foundation.

The collected soil is classified into various colors such as white, black, yellow and red depending on the mountain area and composition, and therefore, the soil is classified according to the color. By sorting by color, it is possible to select or combine the gypsum according to the desired color. Since the collected soil has various colors, it is possible to obtain bricks of various colors according to the blending.

The soil is processed by the following process.

(1) First aging step

The soil generated at the construction site is first aged for 6 months or more in open air exposed to sunlight and wind. In this aging process, weathering due to sunlight and wind occurs. It is easy to crush by weathering, and various kinds of soil, sand and gravel are mixed, so that the uneven soil is weathered, State. This primary aging step is important for obtaining uniform bricks while using soil as the main component. If this first aging process is not performed, cracks will be produced in the produced bricks.

Preferably, picked hard rocks, chadles, etc., which are hard to crush and hard to produce in a uniform state, before and after aging, or during aging process.

(2) Grinding step

The primary aged soil is pulverized. As the milling method, a commonly used method such as milling or roll may be used.

It is preferable that the pulverization has various pulverization particle sizes at 25 mesh (0.71 mm) or less. Preferably, the ground gypsum has a particle size in the range of 0.090 to 0.71 mm.

The fine powder facilitates the mixing with the clay stream and allows the brick to have appropriate strength and viscosity, but if the fine powder is too much, the productivity is lowered due to scattering. Therefore, by making the pulverization particle size to be distributed in various particle sizes including the fine particles within the above-mentioned range, it is possible to obtain a product having uniform physical properties such as compressive strength without using cracks, while using the soil materials of various compositions collected and collected in nature.

(3) Second aging step

The crushed soil is secondarily matured in the silo for 20 to 40 days. During the second aging process, the water content differs between the raw materials having different moisture contents, so that the moisture content is maintained as a whole. At this time, it is preferable to cover with vinyl in order to prevent moisture from being diverted, and the water content is preferably 17 ± 2%. By the secondary aging process, the material can be uniformly mixed.

After the secondary aging, the moisture content of the soil is measured and if necessary, the moisture content of the soil may be adjusted to 15 to 19% by weight. The adjustment may include any one or more of adding moisture, drying to reduce the moisture content, and further aging.

After the secondary aging, further pulverization may be carried out as necessary.

2. Masato

Granite is weathered granite, weathered granitic rocks, and is called 'Hwajangdo'. In the case of Masato, the chemical and refractory (SK) components and temperature of soot waste sludge, which are generated in large quantities in the process of manufacturing artificial sand by using large and hard particles of Masato and collecting aggregate in quarry, It is preferable to use an inexpensive inorganic macaato having fine particles. Especially, it is preferable to use white matsato for color control. White mats are white because they have added quartz and other components, have low pollution degree, have no foreign matter and germs, and have good drainage ability.

Masato is ground and used to have a particle size of 25 mesh (0.71 mm) or less. Using Masato with a particle size of 25 mesh (0.71 mm) or less increases the tackiness and can produce clay bricks without using other inorganic binders.

Supplementary material
If necessary, one or more additives selected from the group consisting of loess, white clay and kaolin may be added to the above raw materials. Preferably, the brick material used in the colored brick composition of the present invention is composed of 50 to 100% by weight of the main raw material and 0 to 50% by weight of the subsidiary raw material.

Coloring composition for coloring and tackiness

A coloring composition for coloring and tacking bricks is a coloring agent containing manganese as a main component and is composed of 65 to 70 parts by weight of manganese dioxide (MnO ₂ ), 40 to 45 parts by weight of manganese (Mn), 6 to 8 parts by weight of iron (Fe) It includes silicon (SiO ₂₎ 6 ~ 8 parts by weight. Hereinafter, 'colorant' in the present invention means a coloring composition used for coloring and tacking.

In the present invention, a manganese mixture having a purity of about 40 to 45% and mixed with manganese dioxide, iron and silicon dioxide is used instead of a single component manganese having a high purity as a colorant. Due to the reaction of the various components contained in the manganese mixture and the components contained in the manganese oxide and the manganese oxide, various colors can be obtained even in a small amount compared with the case of using the single component manganese. In addition, the production cost can be reduced because the sintering temperature is reduced due to the fluxing reaction during the sintering process of the iron oxide minerals and manganese contained in the Tosanamasato. Further, the water absorption rate of the molded article baked by the flux reaction is reduced and the high strength is maintained, thereby improving the quality of the clay brick.

The coloring agent of the above composition is preferably pulverized to have a particle size of 140 mesh (0.106 mm) or less.

The colorant is preferably used in an amount of 0.5 to 2.0 parts by weight based on 100 parts by weight of the main raw materials such as Tosa, Masato or a mixture thereof. Depending on the mixing ratio of the colorant to the main raw material, the chemical reaction with the mineral contained in the main raw material during the sintering process is varied and various colors are expressed. When the colorant is used in an amount of less than 0.5 parts by weight, the coloring effect is lowered and the effect of lowering the firing temperature is also insignificant. On the other hand, when it is used in an amount exceeding 2.0 parts by weight, there is a problem in that defective products are caused due to the fusion of the product due to the excessive melting state of the surface during the firing process.

Manufacture of colored bricks

The method for producing a colored brick of the present invention comprises:

Preparing a colored brick composition as described above; Molding the brick composition to produce a molded article; Drying the molded article at 35 to 95 캜 for 65 to 75 hours; And firing the dried molding at 700-1,110 ° C for 14-21 hours. Each step will be described below.

(1) a step of producing a colored brick composition

100 parts by weight of a brick material mixed with a main raw material selected from Tosa and Masato or a sub ingredient is mixed with 0.5 to 2.0 parts by weight of a coloring agent to prepare a colored brick composition. The remaining description is the same as the description of the colored brick composition.

(2) Forming step

The brick composition is molded to produce a molded article. When forming, it can be formed into various types of bricks as required, such as non-porous bricks, porous bricks, and porous bricks.

At the time of molding, the shape of the brick can be formed by using a vacuum punching machine or a vacuum extrusion molding machine. In this case, the earth pressure of the molded article, which is discharged in a vacuum state at 54 m 3 / h and extrusion-molded into a brick shape, can be set to 2.1-2.4 MPa.

(3) Drying step

The molded product is dried at 35 to 95 DEG C for 65 to 75 hours for moisture control before firing. When drying, a tunnel type drying furnace can be preferably used. According to one embodiment, when the molding is inserted into a tunnel type drying furnace, a temperature of 95 ° C and a humidity of 90-100% are maintained, and when a drying time of 65-75 hours has elapsed, a temperature of 80 ° C and a temperature of 2 Lt; RTI ID = 0.0 >%. ≪ / RTI >

(4) Sintering step

The dried shaped material is calcined at 700-1,110 ° C for 14-21 hours. If the temperature is lower than the above range, firing is not sufficiently carried out, and if the firing temperature is higher than 1,110 ° C, the physical properties of the bricks produced by overprinting may be lowered. Particularly, when manganese is added in an amount of 1.0 part by weight or more, over-sintering occurs at a firing temperature of 1,120 DEG C and the surface is magnetized.

It is preferable to sinter at a temperature of 1,090 ° C or less when 100% of the soil material is used as the main raw material and to sinter at a temperature of 1,110 ° C or less when 100% of the main raw material is used .

Preheating is preferably performed at 100 to 700 ° C for 12 to 19 hours prior to firing.

The firing time may vary depending on the bricks to be produced. For example, in the case of the porous and porous bricks, firing is preferably performed for 14 to 16 hours, and in the case of the non-porous bricks, firing is preferably performed for 17 to 21 hours.

Preferably, the heating is stopped after firing, and the temperature is slowly lowered from 1.110 DEG C to 60 DEG C while cooling slowly over 17 to 25 hours. Upon completion of the cooling, a finished brick is obtained.

In one preferred embodiment of the present invention, the mixture is preheated at 100 to 700 ° C for 12 to 19 hours, calcined at 700 to 1,110 ° C for 14 to 21 hours, heated at a temperature from 1,110 ° C to 60 ° C for 17 to 25 hours Lt; / RTI > to complete the brick.

[Example]

Hereinafter, the present invention will be described in more detail with reference to examples. These examples illustrate the present invention and are not intended to limit the scope of the present invention.

< Example  1 to 4>

After picking out strong pebbles, chadles, etc. from the soil, he first aged Tosa for more than six months. The aged soil was milled using wheat to have a particle size of 25 mesh or less (0.71 mm or less), and then pulverized soil was secondarily aged in a silo for 30 days. The moisture content after the second aging was 17%.

Separately, a colorant containing 66.03 parts by weight of manganese dioxide, 43.10 parts by weight of manganese, 7.10 parts by weight of iron, 7.35 parts by weight of silicon dioxide and 0.30 part by weight of water was prepared.

To 100 parts by weight of the gypsum were added 0.5 parts by weight, 1 part by weight, 1.5 parts by weight and 2 parts by weight of the colorant, respectively, to prepare four kinds of colored brick compositions.

Using the above composition, a brick having a length of 190 mm, a width of 90 mm and a thickness of 57 mm was formed.

The molded bricks were dried at 35 to 95 ° C for 65 hours using a tunnel type drying furnace.

The dried bricks were calcined at 700 to 1,090 占 폚 for 15 hours and then cooled for 17 hours to obtain a mixture of Example 1 (0.5 parts by weight of a colorant), Example 2 (1 part by weight of a colorant), Example 3 (1.5 parts by weight of a colorant) A brick of Example 4 (2 parts by weight of a colorant) was prepared.

&Lt; Comparative Examples 1 and 2 >

(Comparative Example 1) except that a coloring agent was not used (Comparative Example 1), 3 parts by weight of a colorant was used (Comparative Example 2), and a sample was fired at a temperature of 700 to 1,120 캜 Example 1 (no addition of coloring agent) and Comparative Example 2 (3 parts by weight of colorant) were prepared.

&Lt; Examples 5 to 8 >

Example 5 (0.5 parts by weight of a colorant) was prepared in the same manner as in Examples 1 to 4, except that the white matato was pulverized to have a pulverization particle size of 0.71 mm or less and used as the main raw material and calcined at a temperature of 700-1,110 占 폚. Bricks of Example 6 (1 part by weight of colorant), Example 7 (1.5 parts by weight of colorant) and Example 8 (2 parts by weight of colorant) were prepared.

&Lt; Comparative Examples 3 and 4 >

(Comparative Example 3), 3 parts by weight of the colorant were used (Comparative Example 4), and Comparative Example 4 was carried out at a temperature of 700 to 1,150 占 폚 in the same manner as in Examples 5 to 8 Example 3 (no addition of coloring agent) and Comparative Example 4 (3 parts by weight of colorant) were prepared.

<Experimental Example 1>

Confirmation of color of brick according to main ingredient and colorant content

Fig. 1 shows photographs of the bricks obtained in Examples 1 to 4 using soil as the main raw material, and Fig. 2 shows photographs of the bricks obtained in Comparative Examples 1 and 2.

The brick photographs of Examples 5 to 8 using back masato as the main raw material are shown in Fig. 3, and the brick photographs of Comparative Examples 3 and 4 are shown in Fig.

As shown in FIGS. 1 to 4, bricks of various colors were obtained depending on the kind of the raw material and the content of the coloring agent. Further, by using the colorant in a proportion of 0.5 to 2.0 parts by weight, the firing temperature can be lowered by 30 to 40 占 폚.

<Experimental Example 2>

Determination of firing temperature of brick according to the content of main raw materials and coloring agent

It is preferable that the bricks of Examples 1 to 4, in which the soil is used as the main raw material and the coloring agent is used in the range of 0.5 to 2.0 parts by weight, is preferably fired at a temperature of 1,090 占 폚 or less, while the bricks of Comparative Examples 1 and 2 It is most preferable to sinter at a temperature of 1,120 占 폚 or less.

It is preferable that the bricks of Examples 5 to 8 in which white mass is used as the main raw material and 0.5 to 2.0 parts by weight of a coloring agent is fired at a temperature of 1,110 占 폚 or less, while Comparative Examples 3 and 4 It was most preferable to fire the bricks at a temperature of 1,150 캜 or lower.

Thus, when the colorant of the present invention is used in a proportion of 0.5 to 2.0 parts by weight, the firing temperature can be lowered by 30 to 40 占 폚.

<Experimental Example 3>

Confirm absorption rate

The absorption rates of the bricks of Examples 1 to 8 and Comparative Examples 1 to 4 were confirmed. The results are shown in Table 1 below.

sample Main ingredient Colorant content (parts by weight) Absorption Rate (%) Example 1

Tosa 0.5 7.8 Example 2 1.0 7.2 Example 3 1.5 6.8 Example 4 2.0 6.5 Comparative Example 1 0 7.5 Comparative Example 2 3.0 0 Example 5

White Masato 0.5 8.3 Example 6 1.0 8.0 Example 7 1.5 7.8 Example 8 2.0 7.5 Comparative Example 3 0 10.8 Comparative Example 4 3.0 0

From the results of Table 1, it can be seen that the higher the content of the colorant, the lower the absorption rate.

<Experimental Example 4>

Compressive Strength and Absorption Rate Test of Brick

The compressive strength and the water absorption rate were tested according to the method of KS L 4201, a Korean industrial standard of clay brick quality standard. As the sample, the bricks of 190x90x57 obtained in Example 2 were used.

The product quality standards for one type of clay brick KS L 4201 and the test results of the present invention samples are shown in Table 2 below.

quality division Product quality standard for KS L 4201 clay brick Invention Absorption Rate (%) 10.0 or less 7.0 Compressive strength (Mpa) 24.5 or more 42.1

As shown in Table 2, the average compressive strength of the bricks of the present invention was 42.1 Mpa, which was much higher than that of KS L 4201 clay brick (24.5 Mpa). In addition, the water absorption rate is 7.0%, which is lower than the standard for KS L 4201 clay brick (10.0%).

<Experimental Example 5>

Compressive Strength, Bending Strength and Absorption Rate Tests of Floor Bricks

Compressive strength, bending strength and water absorption were tested according to the standard quality standards of floor bricks.

A floor brick obtained in the same manner as in Example 3 was used as the sample, except that it was formed into a bottom brick having a length of 230 mm, a width of 114 mm and a thickness of 60 mm.

The test results of the standard quality standards of the floor bricks and the samples of the present invention are shown in Table 3 below.

Compressive strength (Mpa) Flexural strength (Mpa)
Absorption Rate (%)
Quality standards
30.0 or higher Minimum (value) medium)
9.0 or less 4.0 or higher 5.0 or higher Invention 75.5 6.0 8.5 6.5

As shown in Table 3, the average compressive strength of the brick of the present invention was 75.5 Mpa, which was much higher than that of the floor brick quality standard of 30.0 Mpa. In addition, the water absorption rate is 6.5%, which is lower than the floor brick quality standard of 9.0%, which shows that long-term durability is excellent.

Claims (12)

(a) 50 to 100% by weight of a main raw material pulverized to a particle size of 25 mesh or less, selected from at least one of earths and matsato; Based on 100 parts by weight of a brick material composed of 0 to 50% by weight of an additive selected from at least one of clay, clay, kaolin,
(b) 0.5 to 2 parts by weight of a coloring composition for coloring and tacking,
The coloring composition is characterized by containing 65 to 70 parts by weight of manganese dioxide (MnO ₂ ), 40 to 45 parts by weight of manganese (Mn), 6 to 8 parts by weight of iron (Fe) and 6 to 8 parts by weight of silicon dioxide (SiO ₂ ) By weight of the colored brick composition. delete The method according to claim 1,
The gravel-
Aging soil from the construction site for 6 months or more in the open air;
Crushing the primary aged soil to a particle size of 25 mesh or less; And
And aging the ground gypsum in a silo for 20 to 40 days. The method according to claim 1 or 3,
Wherein the main ingredient is a mixture of gypsum and masato at a weight ratio of 1: 2 to 2: 1. The method according to claim 1 or 3,
Wherein the coloring composition has a particle size of 140 mesh or less. delete (a) 50 to 100% by weight of a main raw material pulverized to a particle size of 25 mesh or less, selected from at least one of earths and matsato; (B) 0.5 to 2 parts by weight of a coloring composition for coloring and tackiness is blended with 100 parts by weight of a brick material composed of at least one kind of additive selected from at least one selected from the group consisting of clay, clay, kaolin and kaolin to prepare a colored brick composition, the coloring composition containing the manganese dioxide (MnO ₂₎ 65 ~ 70 parts by weight, manganese (Mn) 40 ~ 45 parts by weight, iron (Fe) 6 ~ 8 parts by weight of silicon dioxide (SiO ₂₎ 6 ~ 8 parts by weight, the coloring Preparing a brick composition;
Molding the colored brick composition to produce a molded product;
Drying the molded article at 35 to 95 캜 for 65 to 75 hours; And
And firing the dried molding at 700-1,110 占 폚 for 14-21 hours. delete 8. The method of claim 7,
The gravel-
Aging soil from the construction site for 6 months or more in the open air;
Pulverizing the primary aged soil to 25 mesh or less; And
And aging the ground gypsum in a silo for 20 to 40 days to obtain a colored brick. 10. The method according to claim 7 or 9,
Wherein the main raw material is a mixture of the gypsum and the marbella in a weight ratio of 1: 2 to 2: 1. 10. The method according to claim 7 or 9,
Wherein the coloring composition has a particle size of 140 mesh or less.
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