KR20100097273A - Loess tile composition and low-temperature-fired, high-strength loess tile and method for producing the same - Google Patents

Abstract

PURPOSE: A yellow soil tile composition, a high intensity yellow soil tile, and a manufacturing method thereof are provided to reduce the energy consumption by lowering the plasticizing temperature to 700~800 deg C. CONSTITUTION: A yellow soil tile composition contains 30~85wt% of yellow soil, 10~70wt% of glass frit, and 1~10wt% of frit. A high intensity yellow soil tile is plasticized in 700~800 deg C, and has the yield strength more than 200 kgf per square meters. A manufacturing method of the yellow soil tile comprises the following steps: preparing the yellow soil tile composition(S100); crushing and mixing the yellow soil tile composition(S200); molding the yellow soil tile composition to form a tile molded product(S300); drying the tile molded product(S400); and plasticizing the dried tile molded product(S500).

Description

Loess tile composition, low-temperature calcined high-strength loess tile and method for producing the same {Loess tile composition and low-temperature-fired, high-strength loess tile and Method for producing the same}

1 is a process flow chart illustrating a method for producing a low temperature calcined high strength ocher tile in the present invention.

Explanation of symbols on the main parts of the drawings

S100. Material preparation step S200. Grinding Mixing Step

S250. Moisture removal step S300. Tile Forming Step

S400. Tile drying step S500. Tile firing stage

The present invention relates to an ocher tile composition comprising 30-85% by weight of natural loess, 10-70% by weight of cullet and 1-10% by weight of frit, and a temperature of 700-800 ° C. It relates to a low-temperature calcined high-strength ocher tile and a method for producing the same, which have a bending strength of 200 kg _f / cm 2 by firing at 30 minutes-4 hours at.

As urbanization progresses, most residential spaces are constructed of cement and concrete, and modern illnesses such as atopy are caused by restrictions such as ventilation and humidity control, and in recent years, excellent deodorization, ventilation, and moisture proofing effect have been achieved. Ocher tiles, the building materials of Korea's traditional materials, are attracting attention again.

In general, ocher tiles are prepared by mixing and crushing and drying natural loess powders with various raw materials that provide good sinterability, and various functional materials, and then molding them in various ways and then firing them in a temperature range of 850-1200 ° C. .

Thus prepared ocher tile has a compressive strength of 50 kg _f / ㎠ or less, very low durability after construction, the firing temperature is too high during manufacture has a lot of energy consumption.

In more detail, the existing technology, as disclosed in Korean Patent No. 10-0377488, mixes 10-30 wt% of organic clay with 15-40 wt% of processed loess, and promotes 20- to promote sintering. 40% by weight of pottery stone and feldspar are added, and 10-15% by weight of limestone is added to impart durability, followed by mixing process, and 5-10% by weight of primary to give absorption effect and porosity. After firing, the body grinding raw material and a small amount of sludge are mixed, pulverized, dried, aged and molded, and then subjected to a primary firing process for 28-45 minutes in a temperature range of 1100-1150 ° C.

The ocher tile is manufactured by subjecting a predetermined glaze to the first calcined tile body under the above conditions and undergoing a second calcining process for 28 to 45 minutes in a temperature range of 1030-1090 ° C.

Or it is disclosed a method for producing ocher tile through a firing process for 40-60 minutes in the glaze and the base material at the same time in the range of 1170 ℃-1200 ℃.

However, this technique has a disadvantage in that the process is complicated and the energy consumption is high because the primary and secondary firing temperatures are higher than 1000 ° C.

On the other hand, Korean Patent No. 10-0674196 discloses the ocher tile and its manufacturing method.

Looking at this, after mixing the fine sand of low melting point of 01-15% by volume to 85-90% by volume ocher powder, aged, mixed and kneaded by adding water, compression molding, drying process, 850-950 ℃ It consists of a process for baking for 11-13 hours in the temperature range of.

However, this technique has a relatively low firing temperature as 850-950 ° C., but still higher than 850 ° C., and a long firing time of 11-13 hours.

On the other hand, Korean Patent No. 10-0812417 provides an improved manufacturing method of ocher tiles, in summary, after adding up to 50% by weight of sand to ocher, after mixing, grinding, pressing and drying In the firing process to maintain within 24 hours at a temperature of 1000-1200 ℃ provides the ocher tile.

However, this technique also has a disadvantage that the energy consumption is high because the firing temperature is very high, more than 1000 ℃.

According to Korean Patent No. 10-0432590, after adding 40% by weight or less of sand to the loess, mixing, grinding, controlling the moisture content, degassing, forming and drying process, 20 minutes in the initial temperature range of 800 ± 20 ℃ After heat treatment and cooling for -5 hours, and heat treatment for 3-15 hours in the conglomerate temperature range of 1180 ± 30 ℃, a technique for producing ocher tiles having a bending strength of 20.4 kg _f / ㎠ (200 N / ㎠) or more. However, this technique also has a disadvantage that the secondary firing temperature is very high, such as 1000 ℃ or more energy consumption, and the bending strength of the produced ocher tile is 50 kg _f / ㎠ or less.

These conventional techniques have a disadvantage that the firing temperature is higher than 850 ℃ high energy consumption, the bending strength is very low as 50 kg _f / ㎠ or less, so that the durability of the ocher tile falls.

Accordingly, an object of the present invention is to solve the problems of the prior art, ocher tiles composed of 30-85% by weight of ocher, 10-70% by weight of cullet and 1-10% by weight frit It is to provide a low-temperature fired high-strength ocher tiles with a composition having a bending strength of 200 kg _f / ㎠ or more as a material to improve durability.

Another object of the present invention is to provide a low-temperature calcined high-strength ocher tile manufacturing method to improve the production cost savings through the process of calcining the ocher tile composition at a low temperature of 700 ~ 800 ℃ for 0.5-4 hours.

The ocher tile composition according to the present invention for achieving the above object is characterized by comprising 30-85% by weight ocher, 10-70% by weight cullet and 1-10% by weight frit It is done.

The frit is 46 to 50% by weight of silica, 20 to 23% by weight of boron oxide, 17 to 20% by weight of sodium oxide, 4 to 5% by weight of calcium oxide, 3 to 4% by weight of alumina, zinc oxide (ZnO) 2 to 3 It comprises a weight percent and potassium oxide 1 to 2% by weight.

The low temperature calcined high strength ocher tile according to the present invention comprises 30-85 wt% ocher, 10-70 wt% cullet and 1-10 wt% frit, and is calcined at 700 to 800 ° C. It characterized in that it has a bending strength of 200 kg _f / ㎠ or more.

The frit is 46 to 50% by weight of silica, 20 to 23% by weight of boron oxide, 17 to 20% by weight of sodium oxide, 4 to 5% by weight of calcium oxide, 3 to 4% by weight of alumina, zinc oxide (ZnO) 2 to 3 It comprises a weight percent and potassium oxide 1 to 2% by weight.

The method for producing low-temperature calcined high strength ocher tiles according to the present invention comprises preparing an ocher tile composition comprising 30-85 wt% ocher, 10-70 wt% cullet and 1-10 wt% frit. A material preparation step, a pulverizing mixing step of pulverizing and mixing the ocher tile composition, a tile forming step of forming a tile molded body by molding the crushed and mixed ocher tile composition, and a tile drying step of drying the tile molded body; It is characterized by consisting of a tile firing step of firing the tile molded body at 700 ~ 800 ℃.

A tile firing step of firing the tile molded body at 700 to 800 ° C., and a tile drying step of drying the fired tile molded body, are characterized in that it comprises.

In the material preparation step, frit is 46 to 50% by weight of silica, 20 to 23% by weight of boron oxide, 17 to 20% by weight of sodium oxide, 4 to 5% by weight of calcium oxide, 3 to 4% by weight of alumina, zinc oxide ( ZnO) 2 to 3% by weight and 1 to 2% by weight of potassium oxide.

In the grinding mixing step, the ocher tile composition is characterized in that the grinding and mixing by a mill or ball milling method.

Between the grinding mixing step and the tile forming step, characterized in that the water removal step to further have a water content of 10 to 30% by weight relative to the total weight of the ocher tile composition.

The tile forming step is characterized in that the crushed and mixed ocher tile composition by compression molding using a press, or by extrusion molding using an extruder to form a tile molded body.

The tile firing step is characterized in that carried out for 30 minutes to 4 hours.

The tile drying step is characterized in that carried out for 24 to 72 hours in the shade (陰 地).

According to the present invention configured as described above, while reducing the energy consumption by reducing the firing temperature of the ocher tile from the usual 850 ~ 1200 ℃ to 700 ~ 800 ℃, the process is simple, eco-friendly ocher tile by recycling the cullet There is an advantage that can be prepared.

Hereinafter, the configuration of the ocher tile composition employed in the preferred embodiment of the present invention.

The ocher tile composition according to the present invention comprises 30-85% by weight of ocher, 10-70% by weight of cullet and 1-10% by weight frit as a material for producing ocher tiles. .

Although the composition ratio of the loess is slightly different depending on the place of origin, 55 to 65% by weight of silica (SiO ₂ ), 20 to 30% by weight of alumina (Al ₂ O ₃ ), and 6 to 12 weight of iron oxide (Fe ₂ O ₃ ) In addition to the main components in%, feldspars of MgO, sodium oxide (Na ₂ O), potassium oxide (K ₂ O) and calcium oxide (CaO) account for 5 to 8% by weight.

The loess is included in the tile serves to deodorize, warm and moisturize and give plasticity during molding.

And, the ocher is included in 30 to 85% by weight, based on the total weight of the ocher tile composition.

That is, when the ocher content is added less than 30% by weight, the plasticity of the ocher tile composition is insufficient, so that it is difficult to mold the tile molded body by a conventional molding method, for example, extrusion or the like, and the ocher exceeds 85% by weight. When added, not only the firing temperature increases, but also the firing time is long, economic efficiency is low, and the strength of the produced ocher tiles also has the disadvantage of lowering the ocher content is preferably 30 to 85% by weight.

As the cullet, cullet powder pulverized cullet generated in the production process of plate glass, bottle glass, glass fiber, tube glass, etc., or waste glass which can be easily obtained in the distribution process.

Although the composition ratio of the glass is slightly different depending on the use of the glass product, generally 70-75% by weight of silica, 1-2% by weight of alumina, 7-12% by weight of calcium oxide (CaO), 12-15% by weight of sodium oxide, and the like As other components, magnesia (MgO), potassium oxide, iron oxide, etc. account for 2 to 5 wt%.

And the cullet serves to impart the strength of the ocher tile together with the frit, if the cullet content is added less than 10% by weight, there is a disadvantage that the strength of the ocher tile is lowered, when added in excess of 70% by weight The content of the loess is too low, deodorizing, warming and moisturizing effect of the prepared ocher tile is inferior, there is a disadvantage in that it is difficult to use the extrusion process which is a conventional molding method due to the lack of plasticity during molding.

Therefore, in the manufacture of ocher tiles of the present invention, the cullet content is preferably limited to 10 to 70% by weight.

The frit is a low temperature frit that can be easily obtained in the distribution process, and the component composition ratio is 46-50 wt% of silica, 20-23 wt% of boron oxide (B ₂ O ₃ ), 17-20 wt% of sodium oxide, oxidation 4-5% by weight of calcium, 3-4% by weight of alumina, 2-3% by weight of zinc oxide (ZnO) and 1-2% by weight of potassium oxide.

And, the frit lowers the firing temperature of the ocher tile, serves to impart the strength of the ocher tile together with the cullet, when the frit content is added less than 1% by weight, there is a disadvantage that the firing temperature of the ocher tile increases, When added in excess of 10% by weight, there is no problem in strength and firing temperature, but in general, frit is more expensive than ocher and cullet, and it is preferable to add it in the range of 1 to 10% by weight from an economical point of view.

Hereinafter, a method of manufacturing a low-temperature calcined high strength ocher tile (hereinafter referred to as an 'ocher tile') using the ocher tile composition configured as described above will be described with reference to FIG. 1.

1 is a process flow chart illustrating a method for producing a low temperature calcined high strength ocher tile in the present invention.

As shown in the figure, the ocher tile is a material preparation step (S100) for preparing the ocher tile composition comprising 30-85% by weight of ocher, 10-70% by weight of cullet and 1-10% by weight frit And, the grinding and mixing step of grinding and mixing the ocher tile composition (S200), and the tile molding step (S300) of forming a tile molded body by molding the crushed and mixed ocher tile composition, and drying the tile to dry the tile molded body Step (S400) and the tile firing is produced through a tile firing step (S500) of firing at 700 ~ 800 ℃.

When the ocher tile composition having the configuration as described above is prepared in the material preparation step (S100), the grinding mixing step (S200) is performed.

The grinding mixing step (S200) is a process of grinding and mixing the ocher tile composition, it is preferable to use a mill or a ball milling method.

In the case of using the ball milling method, the ball is preferably used in the normal corner, but is not limited thereto.

In addition, wet mixing is preferred for mixing the ocher tile composition in the grinding mixing step (S200), but dry mixing may also be used. In the case of wet mixing, it is preferable to use water as the solvent.

After the pulverized mixing step (S200), a water removal step (S250) for removing the water contained in the crushed and mixed ocher tile composition is carried out.

The water removal step (S250) in the embodiment of the present invention, to remove the water contained in the ocher tile composition using a filter press, when the water removal step (S250) is completed, the water contained in the ocher tile composition The weight of is preferably maintained at 10 to 30% by weight relative to the total weight of the ocher tile composition.

Thereafter, the tile forming step S300 is performed. The tile forming step (S300) is a process of molding the ocher tile composition containing moisture by a weight percent of a predetermined range to have a predetermined shape.

Therefore, in the tile forming step (S300), the ocher tile composition is a process of forming a tile molded body by compression molding using a press or extrusion molding using an extruder.

Thereafter, the tile drying step S400 is performed. The tile drying step (S400) is a process of drying the tile molded body in the shade (陰 地) 24 to 72 hours.

Thereafter, the tile firing step S500 is performed. The tile firing step (S500) is a process of firing and hardening a tile molded body having a predetermined shape, which is performed for 30 minutes to 4 hours in a temperature range of 700 to 800 ° C.

More specifically, when the firing temperature is less than 700 ℃, the softening of the frit is not enough to reduce the strength of the ocher tile, when the firing temperature exceeds 800 ℃ affects the change of the strength of the ocher tile up to 900 ℃ It is not inferior, but it is not economical because of low energy efficiency.

Therefore, the firing temperature of the ocher tile of the present invention is preferably limited to 700 ~ 800 ℃ range.

And, in the case of the firing time of the tile firing step (S500), if the baking time is less than 30 minutes there is a disadvantage that the strength is lowered, if more than 4 hours the additional strength increase is small, the firing time is 30 minutes to 4 hours It is preferable to limit to a range.

Hereinafter, the technical characteristics of the present invention will be described in more detail with reference to the following examples.

Example 1

45% by weight of ocher is added to 45% by weight of cullet and 10% by weight of frit, and the raw material is ground to a particle size of 149 μm or less by ball milling. The milled raw material mixture is passed through a filter press and then aged for three days to have a constant water content.

Tile moldings were prepared by compression molding using the aged ocher tile compositions.

The tile molded product thus prepared was naturally dried in the shade for 72 hours, and then calcined at 700 ° C. for 3 hours to prepare an ocher tile having a natural aesthetic of ocher. The three-point bending strength of the prepared ocher tiles was measured, and the bending strength was very excellent as 410 kg _f / cm 2.

Example 2

10% by weight of cullet and 10% by weight of frit are added to 80% by weight of ocher, and the raw material is ground to a particle size of 250 µm or less by dry ball milling. The crushed ocher tile composition is blended with water by filter press processing, and then passed through a refining machine four times to remove the air present in the ocher tile composition.

The fully degassed ocher tile composition was passed through an extruder to produce a tile shaped body. The tile molded body thus prepared was naturally dried in the shade for 48 hours, and then calcined at a temperature of 750 ° C. for 2 hours to prepare an ocher tile having a natural aesthetic of ocher. The three-point bending strength of the prepared ocher tiles was measured, and the bending strength was very good at 315 kg _f / cm 2.

Example 3

47% by weight of cullet and 3% by weight of frit are added to 50% by weight of ocher and ground to a particle size of 250 μm or less by dry ball milling. The raw material was blended with water by the filter press working the crushed ocher tile composition, and then passed through a refining machine three times to remove the air present in the ocher tile composition.

Thereafter, the ocher tile composition from which the air was removed was passed through an extruder to prepare a tile molding. The tile molded product thus prepared was naturally dried in the shade for 72 hours, and then fired at a temperature of 800 ° C. for 30 minutes to prepare an ocher tile having a natural aesthetic of ocher. The three-point bending strength of the prepared ocher tiles was measured, and the bending strength was very good as 342 kg _f / cm 2.

The scope of the present invention is not limited to the above-described embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the scope of the present invention.

As described above, in the present invention, at least 200 kg _f / cm 2 of the ocher tile composition comprising 30-85% by weight of ocher, 10-70% by weight of cullet and 1-10% by weight of frit. It is possible to produce ocher tiles with bending strength.

Therefore, the durability of the ocher tile is improved, has the natural aesthetics of the ocher has the advantage that the appearance is beautiful.

In addition, in the present invention, the manufacture of the ocher tile is completed through the process of baking the ocher tile composition at a low temperature of 700 ~ 800 ℃ for 0.5-4 hours.

Therefore, since the firing temperature and the firing time for the ocher tile manufacturing are significantly reduced compared with the prior art, the manufacturing cost is reduced and the price competitiveness is improved.

Claims (11)

A loess tile composition comprising 30-85 wt% ocher, 10-70 wt% cullet and 1-10 wt% frit. The method of claim 1, wherein the frit, 46-50 wt% silica, 20-23 wt% boron oxide, 17-20 wt% sodium oxide, 4-5 wt% calcium oxide, 3-4 wt% alumina, 2-3 wt% zinc oxide (ZnO) and oxidation A loess tile composition comprising 1 to 2 wt% potassium. 30-85% by weight ocher, 10-70% by weight cullet and 1-10% by weight frit, fired at 700-800 ° C and has a bending strength of 200 kg _f / cm 2 or more Low temperature calcined high strength ocher tiles, characterized in that. The method of claim 3, wherein the frit, 46-50 wt% silica, 20-23 wt% boron oxide, 17-20 wt% sodium oxide, 4-5 wt% calcium oxide, 3-4 wt% alumina, 2-3 wt% zinc oxide (ZnO) and oxidation Low temperature calcined high strength ocher tiles, characterized by comprising 1-2% by weight of potassium. A material preparation step of preparing an ocher tile composition comprising 30-85 wt% ocher, 10-70 wt% cullet and 1-10 wt% frit, Grinding mixing step of grinding and mixing the ocher tile composition, A tile forming step of forming a tile molded body by molding the ground and mixed ocher tile composition; Tile drying step of drying the tile molded body Low-temperature calcined high strength ocher tiles, characterized in that consisting of a tile firing step of firing the tile molded body at 700 ~ 800 ℃. The method of claim 5, wherein the frit in the material preparation step, 46-50 wt% silica, 20-23 wt% boron oxide, 17-20 wt% sodium oxide, 4-5 wt% calcium oxide, 3-4 wt% alumina, 2-3 wt% zinc oxide (ZnO) and oxidation A low temperature calcined high strength ocher tile, characterized in that it comprises 1-2% by weight of potassium. The method of claim 5, wherein in the grinding mixing step, The ocher tile composition is pulverized and mixed by a mill or ball milling method characterized in that the low-temperature calcined high strength ocher tiles. According to claim 5, Between the grinding mixing step and the tile forming step, Low-temperature calcined high-strength ocher tile, characterized in that the water removal step to further have a water content of 10 to 30% by weight relative to the total weight of the ocher tile composition. The method of claim 5, wherein the tile forming step, Low-temperature calcined high-strength ocher tile, characterized in that the process of forming a tile molded body by compression molding the crushed and mixed ocher tile composition using a press, or by extrusion molding using an extruder. The method of claim 5, wherein the tile firing step, Low temperature calcined high strength ocher tiles, characterized in that carried out for 30 minutes to 4 hours. The method of claim 5, wherein the tile drying step, Low temperature calcined high strength ocher tiles, characterized in that carried out for 24 to 72 hours in the shade.

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