KR100978095B1 - Multicolor fired brick with inorganic pigment and method of preparing thereof - Google Patents

Abstract

PURPOSE: A multi-color fire block with inorganic pigments and a manufacturing method thereof are provided to improve marketability and profitability by displaying desired colors and textures. CONSTITUTION: A multi-color fire block with inorganic pigments comprises mixed soil and pigment. The mixed soil is formed by mixing kaolin 25~35 weight%, fly ash 25~45 weight%, and bottom ash 20~50 weight%. The mixed soil is required for molding the fire block. The pigment is added to the mixed soil and displays various colors on the fire block.

Description

Multicolor Fired Brick with Inorganic Pigment and Method of Preparing

The present invention relates to a multi-colored ceramic brick and a method for manufacturing the same, in particular, a ceramic having a characteristic of being well colored even at high temperatures with respect to a compounded soil made mainly of fly ash and discarded ash ash ( Iii) multi-colored bricks that are mixed with pigments to express various colors and textures, and a method of manufacturing the same.

Building materials generally include bricks and tiles. Among these, bricks can be classified into two types: cement bricks and clay bricks. Clay bricks are one of the building materials baked at high temperature using clay or kaolin as main raw materials. There are various kinds of fire bricks, fire insulation bricks, etc. according to their use and form.

Clay brick is a material of non-bearing structure that is mainly stacked on the exterior wall of a building and is used for aesthetics and insulation of the building surface or for interior interior depending on the characteristics and scope of use.

In addition to the scope of use of the buildings mentioned above, recently, pedestrian floor bricks have been used in India to improve the aesthetics of pedestrian roads. It is gradually expanding. As such a waste brick, there is a domestic patent 10-0608287 "anthracite landfill coal ash brick and a manufacturing method thereof".

However, these bricks have an economic advantage of using discarded inorganic materials (coal ash obtained by burning anthracite coal), but the color of the brick is the main raw material in comparison with the various uses and forms of the brick. Due to its characteristics, it is extremely limited or merely a color of a simple application form, the texture or saturation is insufficient, especially the life of the color is also very short, there is a weak economic value.

Therefore, an object of the present invention is to solve the above problems, by adding ceramic pigments of various colors to the material of the brick made of the landfill ash discarded as waste as a main material, to express the desired color and texture, commercial and economical To provide a multicolored ceramic brick and a method of manufacturing the same.

Multi-color ceramic brick of the present invention for achieving the above object is mixed with 25 to 35% by weight of kaolin, 25 to 45% by weight of fly ash and 20 to 50% by weight of ash ash of claim 1 A compounded soil, the composition being provided to form a brick of a predetermined shape; 10 to 20% by weight is added to the total weight of the blended soil, characterized in that it comprises a pigment for imparting various colors to the brick formed by the blended soil.

The pigment is characterized in that the non-toxic pigments of any one or two or more of cobalt, chromium, cadmium, iron oxide.

In addition, the landfill ash is ground by grinding the ash ash of various sizes (roller mill) to form a particle size of 25 ~ 30 mesh (mesh), and then in a kiln of 1000 ~ 1150 ℃ It is characterized by firing for 8 to 10 hours.

Method for producing a multi-color ceramic brick of the present invention for achieving the above object, 25 to 30 mesh (Mesh) by grinding the collected ash of various sizes (Bottom Ash) of claim 4 in a roll mill, A landfill processing step of sorting to achieve a particle size of and then firing for 8 to 10 hours in a kiln at 1000 to 1150 ° C. for drying; 20 to 50% by weight of processed ash ash and 25 to 45% by weight of fly ash are placed in a prepared stirrer and mixed uniformly. Then, 25 to 35% by weight of kaolin is added and mixed uniformly. Compounding soil composition step for obtaining; Adding a pigment to the total weight of the mixed soil to impart various colors to the mixed soil, adding water with 10 to 20 weight of the pigment, and mixing the mixed soil for 2 to 4 hours; Compressing the blend added with the pigment collected in the stirrer to 20 to 50 hp to remove bubbles contained in the blend, and putting the defoamed blend into a mold to form a brick having a predetermined color having various colors; It is characterized in that it comprises a step of drying the molded bricks of various colors for 20 to 24 hours at 100 ~ 150 ℃ and put into a pre-prepared firing kiln for 12 hours at 1150 ~ 1200 ℃ and then aged for 4 to 6 hours. .

The pigment is characterized in that the non-toxic pigments of any one or two or more of cobalt, chromium, cadmium, iron oxide.

In addition, the landfill ash is pulverized the ash ash of various sizes (Roller Mill), sorted to achieve a particle size of 25 ~ 30 mesh (Mesh), and then kiln of 1000 ~ 1150 ℃ It is characterized in that fired at 8 to 10 hours.

The present invention, in the manufacture of bricks or tiles, has the effect of contributing to the prevention of environmental pollution by recycling fly ash, as well as fly ash discarded or discarded, in particular by expressing various colors and textures by the pigment added to the brick material It has the effect of gaining high design capability, commerciality and economic value.

Hereinafter, more preferred embodiments of the present invention will be described in detail.

<Production Example>

<Step 1: Landfill processing step>

Bottom ashes of various particle sizes collected are pulverized with a roll mill of 20-50 horsepower. The reason for grinding is to crush the remaining burnt lumps contained in the landfill ash so that they burn well during the firing process. The crushed landfill is again screened to form a particle size of 25-30 mesh using a sieve of 25-30 mesh. The reason for the selection is to filter out foreign substances such as stones. After sorting, the mixture is placed in a kiln at 1000-1150 ° C. and calcined for 8-10 hours, and then dried again for 4-5 hours to prepare a homogeneous landfill. The reason for firing the landfill ash is to obtain excellent aggregate free of impurities by burning off the heavy metals, carbon powder and salt contained in the landfill ash. The real picture of the landfill 10 processed in the same manner as shown in the photo of Figure 1 shown.

<Step 2: Mixing Soil Mixing Composition Step>

20-50% by weight of the landfill ash (Bottom Ash) and 25-45% by weight fly ash (Fly Ash) processed in Step 1 are mixed in the prepared stirrer for 2 to 4 hours. When the first mixing is completed, add 25-35% by weight of kaolin and mix it again for 2 to 4 hours to obtain a mixed soil.

If less than 25% by weight of kaolin is used in the present invention, there is a problem in molding, and when used in excess of 35% by weight, there is a problem in that the brick becomes a weight.

In addition, in the present invention, when forming a brick using less than 25% by weight of fly ash and less than 20% by weight of ash ash, there is a problem that the saturation and texture of color are deteriorated, and also relatively Overuse of kaolin is inevitable, and the recycling ratio of waste (especially landfill ash) is reduced, resulting in a cost reduction.

On the contrary, when fly ash exceeds 45% by weight, the surface of the product is smooth and the texture is improved, but there is a concern that the function of kaolin added together may be impaired, thereby degrading the formability and strength of the product. When the amount of landfill ash added exceeds 50% by weight, the strength of the product is strengthened. However, as the particles become thicker and the surface becomes rougher than kaolin or fly ash, the texture of the product may be degraded.

Landfill ash used in the present invention used an average particle diameter of 20 ~ 23㎛ generated from Boryeong thermal power plant, it is composed of the components shown in Table 1.

In particular, the landfill ash is coal ash obtained by burning anthracite coal. The anthracite is carbonized well and does not emit smoke as coal, which has a low volatile content of 3-7% and a high fixed carbon content of 85-95%. Therefore, when burning, the flame is short and there is no smoke. Non-coking does not coke. Since the ignition point is about 490 ℃, the fire does not catch well, but the fire is strong and it burns continuously while maintaining a constant temperature. It is mainly produced from the old strata of Paleozoic, and most of Korea's coal belongs to it.

Fly ash was used having an average particle diameter of 20 ~ 25㎛ generated from Boryeong thermal power plant (see the real picture of the fly ash 20 of Figure 2), it is composed of the components shown in Table 1.

Kaolin was used in Hadong, Gyeongsangnam-do, and Kaolin has a halloysite crystal structure (see the real picture of Kaolin 30 in FIG. 3), and the chemical composition ratio was similar to that of Fly Ash and Bottom Ash. (See Table 1 below).

Item SiO2 Al2O3 Fe2O3 CaO MGO K2O N2O TiO2 MnO2 P2O5 loss of
Ignition Average particle diameter china clay 49.98 28.77 1.20 13.88 0.59 0.28 2.63 0.12 0.02 0.01 2.53 23.1 μm Fly ash 45.02 28.50 4.38 1.25 0.74 3.45 0.22 1.44 0.04 0.18 14.45 25.2 μm Landfill 62.05 25.18 3.50 4.70 1.04 4.20 1.55 1.60 0.08 0.22 2.50 22.5 μm

<Step 3: Pigment Mixing Step>

In order to give various colors to the blended soil evenly completed in step 2, water was added with the addition of 10 to 20 weight of the pigment (see the real picture of Fig. 4a to 4g) to the total weight of the mixed soil, and then again in a stirrer 2 The pigment is aged to fix the soil well in the mixed composition for ˜4 hours.

Cobalt, chromium, cadmium, and iron oxide are used as the pigment, which is one of the main constituents of the brick of the present invention, and the pigment means a mineral that does not oxidize and maintains saturation and coloring even at a high temperature of 1200 to 1500 ° C. Such ceramic pigments mean minerals suitable for various colors and may use pigments which do not oxidize even at the high temperature. As a pigment, the same thing as the description of Table 2 below, or a mixture of two or more thereof is used. As the pigment used in the present invention, it is preferable to use a non-toxic pigment that is harmless to the human body.

If the pigment is less than 10% by weight, the color and color saturation is lowered and the texture of the brick may be lowered.On the contrary, when the amount of the pigment is added more than 20% by weight, the color and color saturation may be increased. However, there is a problem that the half of the texture and the increase in cost due to over-coloring the primary color. Therefore, in the present invention, it is preferable to use a pigment of 10 to 20% by weight.

color blue green Red orange color yellow Brown Black color ingredient cobalt chrome cadmium cadmium cadmium Iron oxide Iron oxide

<Step 4: Molding Step>

Compress the blended soil with the pigment collected in the stirrer to 20-50 horsepower to remove bubbles such as air in the blend. The defoamed compound is put into a mold of a predetermined shape and vacuum-extruded at a pressure of 200 to 250 psi to form a brick of a predetermined shape having various colors having a moisture content of 10 ± 2%.

<Step 5; Firing Step>

The molded brick moldings of various colors are dried at 100 to 150 ° C. for 20 to 24 hours, then placed in a prepared tunnel-type kiln, and heated to a temperature of 1150 to 1200 ° C. and maintained at this temperature for 12 hours to be fired. After firing is completed, various multi-colored ceramic bricks (50a to 50l) are obtained by undergoing aging and drying for 4 to 6 hours. This is shown in the real picture in Figures 5a to 5l for each color. In addition, the bricks (50a ~ 50l) thus prepared can be used for the purpose of building bricks, bricks for indoor interior, floor bricks for sidewalks.

In the above described as an example of manufacturing a brick, it will be easily understood that the method can be applied to interior and exterior tiles as it is. 6A to 6F show real pictures of the tiles 60a to 60f.

Example 1

Kaolin 25%, fly ash 25% by weight and processed ash ash (50% by weight) was mixed to form a mixed soil, 10% by weight of the pigment is mixed with the total weight of the mixing vessel for 2 hours of natural aging 200psi Vacuum extrusion was carried out under pressure to form a brick.

The brick-shaped molded product was dried at 150 ° C ± 20C for 24 hours, and then placed in a tunnel-type kiln, and heated to 1150 ± 10 ° C and held for 12 hours to carry out firing. Prepared.

<Examples 2 to 7>

Example 2 to 7, as shown in Table 3, only the material ratio and the ratio of the pigment of the mixed soil, bricks were prepared in the same manner as in Example 1.

Item Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 china clay 30 wt% 30 wt% 30 wt% 25% by weight 26% by weight 26% by weight Fly ash 30 wt% 40 wt% 25% by weight 33% by weight 26% by weight 34% by weight Landfill 40 wt% 30 wt% 45 wt% 42 wt% 48 wt% 40 wt% Sum 100 wt% 100 wt% 100 wt% 100 wt% 100 wt% 100 wt% Pigment Mixing Ratio Compound soil
At gross weight
15 wt% Compound soil
At gross weight
15 wt% Compound soil
At gross weight
15 wt% Compound soil
At gross weight
15 wt% Compound soil
At gross weight
15 wt% Compound soil
At gross weight
15 wt%

Experimental Example 1

Before firing in Examples 1 to 7 measured the moisture content and the compressive strength of the molded brick is a brick-shaped molded product and the results are shown in Table 4 below.

division Drying time Drying temperature Moisture content Compressive strength Example 1 24 hours 150 ± 20 ℃ Top
Center
bottom 13 N / ㎡
12 N / ㎡
10 N / ㎡ Example 2 24 hours 150 ± 20 ℃ Top
Center
bottom 15 N / ㎡
13 N / ㎡
11 N / ㎡ Example 3 24 hours 150 ± 20 ℃ Top
Center
bottom 15 N / ㎡
14 N / ㎡
13 N / ㎡ Example 4 24 hours 150 ± 20 ℃ Top
Center
bottom 14 N / ㎡
13 N / ㎡
12 N / ㎡ Example 5 24 hours 150 ± 20 ℃ Top
Center
bottom 12 N / ㎡
11 N / ㎡
9 N / ㎡ Example 6 24 hours 150 ± 20 ℃ Top
Center
bottom 12 N / ㎡
11 N / ㎡
9 N / ㎡ Example 7 24 hours 150 ± 20 ℃ Top
Center
bottom 7 N / ㎡
6 N / ㎡
5 N / ㎡

Experimental Example 2

Compressive strength and bending strength were measured for the bricks prepared according to Examples 1 to 7, respectively, and the results are shown in Table 5 below.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Compressive strength N / mm2 26.4 28.0 25.8 22.6 24.2 30.7 34.8 Bending Strength N / ㎡ 5.50 5.50 5.50 5.50 5.50 5.60 5.60

As confirmed in the above experimental example, it can be seen that the brick produced according to the present invention maintains almost the same strength as the existing product (product made by mixing fly ash, landfill ash and feldspar).

Experimental Example 3

Each brick prepared according to Examples 1 to 7 was placed in water for 12 hours, then taken out and weighed to measure the water absorption rate, and the results are shown in Table 6 below.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Absorption rate (%) 8.3 8.6 8.5 9.4 9.8 9.8 10.4

As can be seen in Table 6, the brick produced according to the present invention shows an almost equal or better absorption rate than the existing product (product made by mixing fly ash, landfill ash and feldspar), It can be seen indirectly that it is an environmentally friendly product that can exert a good function in plant growth by increasing the water absorption rate.

Experimental Example 4

Each brick prepared according to Examples 1 to 7 was immersed in water for 12 hours and then taken out to determine the adsorption rate on the cloth by the dry cloth.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Adsorption rate (%) 0.2 0.3 0.5 0.4 0.3 0.6 0.7

As can be seen in Table 7, the brick produced according to the present invention has a very low discoloration rate of the color compared to the color coating on the surface of the existing product (product made by mixing fly ash, landfill ash and feldspar). Indirectly known. In particular, it can be seen indirectly from the above experimental example that the color and texture according to the pigment in the present invention are very excellent in comparison with existing products.

The present invention has an industrial advantage that has a high commerciality by diversifying the material and color of the brick by using a bottom ash (a kind of waste) and a ceramic pigment that can be colored even at high temperatures as a material of the brick, In addition, there is an industrial applicability that can contribute to the prevention of environmental pollution by recycling the land ash which has been disposed and landfilled.

 Although described with reference to a preferred embodiment of the present invention, those skilled in the art that various modifications and changes can be made within the scope of the present invention without departing from the spirit and scope of the invention described in the claims below. I can understand.

1 is a real picture of the bottom ash (Bottom Ash) used in the manufacture of the brick of the present invention,

Figure 2 is a real picture of fly ash (Fly Ash) used in the manufacture of the brick of the present invention,

3 is a real picture of kaolin used in the manufacture of a brick of the present invention,

4a to 4g are real photos of the pigments used to color the bricks of the invention,

5a to 5f are real photos of ceramic bricks of various colors according to the present invention;

6a to 6f are real pictures of ceramic tiles of various colors implemented by the present invention.

Claims (6)

delete delete delete The collected ash of various sizes was crushed with a roll mill, sorted to achieve a particle size of 25 to 30 mesh, and then 8 to 10 hours in a kiln at 1000 to 1150 ° C. Landfill ash processing step of firing and drying; 20 to 50% by weight of processed ash ash (Bottom Ash) and 25 to 45% by weight fly ash (Fly Ash) in a pre-prepared stirrer and mixed uniformly, then kaolin 25 ~ 35 weight Adding% to uniformly mix to obtain a mixed soil; For imparting various colors to the blended soil evenly mixed, 10 to 20% by weight of the pigment is added to the total weight of the mixed soil and the step of aging the mixed soil while mixing composition for 2 to 4 hours; Extruding the mixed soil to which the pigment collected in the stirrer is added at 20 to 50 hp to remove bubbles contained in the blend, and putting the bubble-free blend into a mold to compress the brick compact having a predetermined shape having various colors; And Preparation of multi-colored ceramic bricks comprising the step of drying the brick moldings of various colors for 20 to 24 hours at 100 ~ 150 ℃ and then put in a pre-baked kiln for 12 hours at 1150 ~ 1200 ℃ and aged for 4 to 6 hours Way. 5. The method of claim 4, wherein the pigment is a non-toxic pigment in which any one or two or more of cobalt, chromium, cadmium, and iron oxide are mixed. The method of claim 4, wherein the landfill ash is pulverized in a variety of sizes (Bottom Ash) in a roll mill (Roller Mill), after screening to form a particle size of 25 ~ 30 mesh (Mesh), and then 1000 ~ 1150 Method for producing a multi-colored ceramic brick characterized in that the fired in the kiln of ℃ 8-10 hours.

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