KR102219286B1 - Basalt and its manufacturing method using chloride - Google Patents

Abstract

The present invention relates to a basalt flagstone using chlorides and a method for manufacturing the same. More particularly, the present invention relates to a basalt flagstone using chlorides, which maintains the unique texture of basalt and can increase added value as a building material, and a method for manufacturing the same.

Description

Basalt flagstone using chloride and its manufacturing method {Basalt and its manufacturing method using chloride}

The present invention relates to a basalt flagstone using chloride and a method of manufacturing the same, and more particularly, to a basalt flagstone using chloride and a method of manufacturing the same, which maintains the unique texture of basalt and can increase added value as a building material.

In general, the advantage of basalt is that when basalt is used as an interior and exterior material for a building, it has a natural feel and a low cost compared to other stone types due to its unique shape.

In modern architecture, basalt is widely used as an indoor and outdoor finishing material.

Moreover, the demand for stone is gradually increasing due to the preference of stone as a non-combustible material, which has become a problem these days, and its characteristic that it does not discolor over time.

In addition, after being imported from Vietnam, the price is inexpensive, and the demand group is getting thicker.

However, when used as a building exterior material, a leakage problem occurs due to the peculiar shape of basalt, and in order to compensate for this, additional costs are incurred in the selection of waterproofing or insulating materials on the exterior wall of the building.

Due to the unique texture of basalt, water accumulates in it, which causes moss or discoloration in shaded areas or after rainy season.

The basalt is usually dark gray or blackish fine-grained volcanic rock that is formed by rapidly cooling off the surface.

Basalt has a porous structure with irregular voids on the surface of the rock, which is a trace of the volatile components contained in the eruption of magma.

Basalt is composed of silicon oxide (SiO ₂ ), aluminum oxide (Al ₂ O3), ferric _{oxide (Fe 2} O ₃ ), calcium oxide (CaO), potassium oxide (K ₂ O), sodium oxide (NA ₂ O). ), magnesium oxide (MgO), etc.

However, due to the characteristic texture of existing basalt (naturally, bubbles are generated when basalt is generated, the surface is porous), a chronic leakage problem occurs when used as an exterior wall of a building. There is a need for a way to compensate for this.

Registered Utility Model Publication No. 20-0293578 Registered Patent Publication No. 10-1410298 Registered Patent Publication No. 10-1175999 Unexamined Patent Publication No. 10-2020-0077189

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a basalt flagstone using chloride for maintaining a unique texture of basalt and increasing added value as a building material.

In addition, in the present invention, the Oseok (black) series among natural stones has a high preference as a building material, but in case the cost is expensive compared to the case where the construction cannot be easily determined, the low-cost basalt is processed to give the color as much as the Oseok series. Therefore, it is an object of the present invention to provide a method for producing basalt flagstone using chloride with a high cost-performance ratio as a building material.

In order to solve the above problems, the present invention is to remove moisture and impurities by heating the basalt flagstone at 400°C; After cooling the basalt flagstone, solid cobalt chloride (CoCl ₂ ) is diluted in water, but the dilution ratio is 85 to 90% by weight of water and 10 to 15% by weight of cobalt chloride, and then the cobalt chloride is diluted. Adding 3 to 6% by weight of the oxide cobalt oxide (Co ₂ O ₃ ) and 2 to 5% by weight of iron oxide (FeO) to 90 to 95% by weight of water so that the solution penetrates into the inside ; Drying the basalt flagstone sufficiently impregnated with the cobalt chloride mixture solution at room temperature; Replacing the dried basalt flagstone in a sintering kiln and heating it to 1,150°C to 1,160°C; Gradually cooling the heated basalt flagstone; Spreading and applying a low degree of glaze on the cooled basalt flagstone surface; The basalt flagstone is placed in a firing kiln, and firing is performed at a temperature of 1,000 to 1,250°C.

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The present invention made as described above can increase cost-effectiveness as a building material by processing basalt flagstone at an inexpensive price to give a color equivalent to that of Oseok.

In addition, the present invention makes it black by adding blue, which is a complementary color in chromaticity, to change reddish brown to black, and the glaze enters the hole so that water does not leak and the peculiar shape and texture of basalt can be maintained. have.

FIG. 1 is a view showing the basalt flagstones in which (a) a sintering temperature of 400°C in the first sintering step and (c) a sintering temperature of 1,100 to 1,200°C in the second sintering step are applied to the existing basalt.
2 is a view showing that the surface and interior of the basalt flagstone fired according to an embodiment of the present invention are changed to the same color.
3 is a view showing a state of firing before and after applying glaze to the surface of the basalt flagstone according to an embodiment of the present invention.
4 is a view showing a method of manufacturing a basalt flagstone using chloride according to an embodiment of the present invention.
5 is a view showing a method of preparing a cobalt chloride mixed solution according to an embodiment of the present invention.
6 is a view showing a method of manufacturing a basalt flagstone using chloride according to another embodiment of the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shape of the element in the drawings may be exaggerated to emphasize a clearer description. It should be noted that in each drawing, the same member may be indicated by the same reference numeral. In addition, detailed descriptions of known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

The method for producing a basalt slab using chloride according to the present invention includes the steps of removing moisture and impurities by heating the basalt slab at 400°C; Cooling the basalt flagstone and immersing it in a mixed solution of cobalt chloride so that the solution permeates the inside; Drying the basalt flagstone sufficiently impregnated with the cobalt chloride mixture solution at room temperature; Placing the dried basalt flagstone in a firing kiln and heating it to 1,100 to 1,200°C; It comprises; gradually cooling the heated basalt flagstone.

The method of manufacturing a basalt slab using such chlorides is based on the fact that the color of the basalt slab changes depending on the firing temperature, and the result of the experiment was derived.

Specifically, as shown in FIG. 1, (a) was applied to the existing basalt with a firing temperature of 400°C as a first step of firing (b) and a firing temperature of 1,150°C as a second firing step.

When the basalt flagstone in its natural state is processed into a panel shape having a certain area and thickness to provide a basalt flagstone, and then the basalt flagstone is fired at a certain temperature, the color of the basalt flagstone changes according to the firing temperature, and the higher the firing temperature is, the reddish it is. You can see that it turns brown.

This is because ferric oxide (Fe ₂ O ₃ ) among basalt constituents turns reddish brown in response to heat.

When the sintering temperature of the basalt flagstone is 1,100 to 1,200°C, the basalt flagstone changes to reddish brown. At this time, the preferable calcination temperature is 1,150°C, which becomes the darkest reddish brown at this temperature.

The basalt flagstone is made black by adding blue, which is a complementary color in chromatology, to change reddish brown to black.

This is because in chromaticity, the complementary color mixture becomes black achromatic.

The blue material should not undergo any further chemical reactions after firing at the firing temperature so that the UV rays and external climate do not discolor in the future.

The characteristic of cobalt chloride (CoCl ₂ ) becomes blue when sintered at high temperature, and it is water-soluble, so that it is easy to penetrate into the interior of the porous basalt flagstone.

In addition, the cobalt chloride does not change color after firing, and does not change until the temperature is higher than the firing temperature.

Preparation for experiment

① Basalt flagstone preparation

The natural basalt is processed into a panel shape having a certain thickness and area to form a basalt flagstone, then put it in a sintering kiln and sintered at a firing temperature of 400℃ to completely remove internal moisture and surface foreign matter.

② Preparation of cobalt chloride (CoCl ₂ ) mixed solution

First, solid cobalt chloride (CoCl ₂ ) is diluted in water.

Here, as for the dilution ratio, 85 to 90% by weight of water and 10 to 15% by weight of cobalt chloride are added, but when the amount of water is 90% by weight, 10% by weight of cobalt chloride is most preferably added.

_{Subsequently, cobalt oxide (Co 2} O ₃ ) 3 to 6 wt% and iron oxide (FeO) 2 to 5 wt% are added to 90 to 95 wt% of water in which the cobalt chloride is diluted to form a cobalt chloride mixed solution. When the cobalt chloride is 92% by weight of diluted water _{, it is most preferable to add 5% by weight of cobalt oxide (Co 2} O ₃ ) and 3% by weight of iron oxide (FeO).

The reason for separating and mixing water-soluble cobalt chloride and mineral (fine) oxides is to prevent minerals from sedimentation. Therefore, it is desirable to stir the oxides well before use to prevent sedimentation. Do.

In addition, even if the specific gravity of cobalt chloride is increased during the dilution process of water and cobalt chloride, since a certain blue color does not appear due to characteristics, cobalt oxide and iron oxide are additionally added to compensate for this.

At this time, the water-soluble cobalt chloride penetrates into the basalt rock so that the cut surface has the same color as the outside when cutting.Cobalt oxide and iron oxide are solids in the form of powders, which are colored between the basalt porous masses, resulting in a dark color that is insufficient with cobalt chloride. It plays a role that complements it more.

Firing process (firing step 1, firing step 2)

① Put the basalt flagstone in a sintering kiln and heat it to 400℃ to perform the first stage of calcination to remove moisture and impurities.

② The cooled basalt flagstone is precipitated in the prepared cobalt chloride mixed solution for 30 minutes so that the cobalt chloride mixed solution penetrates into the inside of the basalt flagstone sufficiently.

At this time, in the present invention, a basalt flagstone having a thickness of 30mm is used, and when the thickness of the basalt flagstone is different, it is necessary to adjust the settling time.

③ Dry the basalt flagstone in which the mixed solution of cobalt chloride has been sufficiently soaked at room temperature for about 12 hours.

At this time, if the basalt flagstone is dried outdoors, it is preferable to proceed indoors because the surface-colored oxide may be lost due to wind.

④ Put the dried basalt flagstone in a firing kiln and heat it to 1150℃ to perform the second firing step.

During heating in the second sintering step, moisture may remain inside the stone up to 400°C, so the air conditioning hole of the sintering kiln must be opened and then all holes in the sintering kiln are closed and sintered to 1150°C.

This is to prevent this and protect the firing kiln because the basalt is made of porous material, which can lead to external cracks due to thermal expansion of the porous material inside during firing.

⑤ After heating the firing temperature to 1150℃ (below melting point), cool it slowly.

In this way, it can be seen that the basalt flagstone is changed to black as shown in FIG. 2, and not only the outer surface is changed, but the same color is changed to the inside.

That is, Figure 2 (a) is a basalt flagstone that has undergone the first step of calcination, (b) is a basalt flagstone that has undergone the second step of calcination after being precipitated in a mixed solution of cobalt chloride, and (c) is the same color to the inside of the cut surface. It is a basalt flagstone that can be identified.

Coating process (3 steps of coating layer formation and firing)

① Prepare the basalt flagstone obtained in the second stage of firing.

② Apply a thin layer of low-grade glaze (use commercially available products) on the surface of the basalt flagstone. (Apply glaze)

The existing low-hwado glaze is made in the form of a thin plaster and then applied to the surface of the basalt flagstone. This is to block the porosity with a glass film after firing because the glaze sufficiently enters between the porosities peculiar to basalt.

③ Put the prepared basalt flagstone in the firing kiln.

④ The firing temperature is 1,000 ~ 1250 ℃, but proceed to the three stages of firing, here 1050 ℃ is the most preferable.

⑤ After heating the firing temperature to 1050℃, cool it slowly.

That is, this glass film coating process is a process to compensate for the leakage problem when the basalt flagstone is used as a building material by coating the outer surface of the basalt flagstone with glaze based on the results of firing steps 1 and 2.

FIG. 3(a) is a matte basalt flagstone that has been subjected to a second firing step, and (b) is a view showing a basalt flagstone coated with a glass film on the surface after three firing steps.

As a result of coating a glass film with glaze on the surface of the matte basalt flagstone, which is the result of the cobalt chloride mixed solution being precipitated through the 2nd sintering step, the glaze enters the peculiar hole of basalt, causing the hole to be formed, and water leakage. It did not occur, and the result was obtained that the peculiar shape of basalt was maintained.

Meanwhile, as another embodiment of the present invention, the carbon material forming the coating layer other than the glass film coating is made of any one of a thermoplastic resin, a carbon fiber, and an inorganic material, and a dye or a natural inorganic pigment may be additionally added thereto.

The thermoplastic resin used in the present invention uses a property that causes plastic deformation when heated, but becomes reversibly hard when cooled, and is usually made of a polymer material in a solid state.

In this case, when a polymer compound having a linear structure is heated, it can be transformed into various shapes by revealing plasticity, and when cooled, it hardens while maintaining its shape. When heat is applied again, it becomes soft, and when heated to a high temperature continuously, it becomes a fluid.

In addition, the crystalline thermoplastic resin includes polyolefin resin, polyamide resin, and the like, and is milky white. Amorphous thermoplastic resins include vinyl chloride resin, polystyrene, ABS resin, acrylic resin, and the like.

Materials such as manganese, cobalt, cadmium, acid, and gold are selectively used as the pigment, and various colors of the quartz layer may be formed depending on the added pigment.

The natural inorganic pigment is not particularly limited unless it is a component contrary to the object of the present invention, but in the present invention, rock crystal, amethyst, titanium dioxide mineral, aluminum hydroxide, precipitated barium sulfate and Any one or two selected from barite powder, bentonite, mica, gypsum, talc, natural or precipitated calcium carbonate, kaolin, and complex oxide pigments It consists of above.

In addition, the coating layer is polyolefin (polyolefin), ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), silicone resin (silicone resin), TPT (Tedlar / PET / Tedlar), TPE (TPE; Tedlar / PET/EVA), TAT (Tedlar/Al foil/Tedlar), TPAT (Tedlar/PET/Al foil/Tedalr), TPOT (Tedlar/PET/Oxide/Tedlar), PA (PAP; PEN/Al foil/PET) or Polyester.

On the other hand, it is possible to provide a basalt flagstone using chloride using the above manufacturing method.

That is, the basalt flagstone using chloride according to the present invention has a basalt flagstone having a certain area and thickness by processing the basalt in a natural state into a panel, heating it to 400°C to remove moisture and impurities, and then calcining Immerse the solution in a mixed solution of cobalt for a certain period of time to allow the solution to penetrate into the basalt flagstone, and then dry it for a certain period of time, then place it in a sintering kiln and heat it to 1,100℃ ~ 1,200℃ to fire and cool it, and then reduce the degree of reduction on the cooled basalt flagstone surface. After applying the glaze to form a coating layer, it was again placed in a sintering kiln, heated to 1,000 to 1,250°C, and fired.

As described above, the basalt flagstone using chloride according to the present invention and its manufacturing method can increase cost-effectiveness as a building material by processing basalt flagstone at an inexpensive price and giving it a color equivalent to that of the five-stone series, and reddish brown to black. In order to change the color, blue color, which is a complementary color in color science, is added to make it black, and when using existing water repellents, there is a risk of discoloration of the surface of the basic flagstone, and a glass glaze is used to compensate for the disadvantage that the water repellent effect decreases over time. Accordingly, this glaze can be used semi-permanently by protecting the flagstone from ultraviolet rays or weathering, while also preventing water leakage by making holes by forming holes as it enters the inside of the flagstone. Above all, the shape and texture of basalt are unchanged. It is an invention with a very high industrial applicability as it can be maintained to expand consumers' choice of building materials.

Claims (5)

Heating the basalt flagstone to 400° C. to remove moisture and impurities;
After cooling the basalt flagstone, solid cobalt chloride (CoCl ₂ ) is diluted in water, but the dilution ratio is 85 to 90% by weight of water and 10 to 15% by weight of cobalt chloride, and then the cobalt chloride is diluted. Adding 3 to 6% by weight of the oxide cobalt oxide (Co ₂ O ₃ ) and 2 to 5% by weight of iron oxide (FeO) to 90 to 95% by weight of water so that the solution penetrates into the inside ;
Drying the basalt flagstone sufficiently impregnated with the cobalt chloride mixture solution at room temperature;
Replacing the dried basalt flagstone in a sintering kiln and heating it to 1,150°C to 1,160°C;
Slowly cooling the heated basalt flagstone;
Spreading and applying a low degree of glaze on the cooled basalt flagstone surface;
Reserving the basalt flagstone in a firing kiln, and performing firing at a temperature of 1,000 to 1,250°C. Method for producing a basalt flagstone using chloride.
delete delete delete Basalt flagstone using chloride using the manufacturing method of claim 1.

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