KR102117863B1 - Marble panel comprising slag and stone powder and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a method for manufacturing a high-strength marble panel. The method includes: a step of preparing a ceramic mixture by mixing slag with two or more types of stone powder selected from granite, gneiss, basalt, limestone, dolomite, elvan, calcite, feldspar, muscovite, biotite, graphite, sandstone, talc, amphibole, serpentine, quartzite, bluestone, and macsumsuk; a step of preparing a pellet by solidifying the ceramic mixture; a step of melting the pellet by preheating and heating; a step of preparing a mixture by mixing the molten material with an inorganic coloring pigment; a step of preparing a marble panel by compression-molding the mixture; a step of performing annealing heat treatment on the compression-molded marble panel; a step of cooling the marble panel after the annealing heat treatment; a step of crystallizing the cooled marble panel; a step of grinding the surface of the crystallized marble panel; and a step of cutting the surface-ground marble panel and polishing the cut surface.

Description

High-strength marble panel containing slag and stone powder and its manufacturing method. {MARBLE PANEL COMPRISING SLAG AND STONE POWDER AND MANUFACTURING METHOD THEREOF}

The present invention relates to a high-strength marble panel containing slag and stone powder, and a method for manufacturing the same, more specifically, by containing two or more types of slag, which is a steel mill waste, and stone powder, which is a stone processing waste, incombustible performance, weather resistance, water resistance, and eco-friendliness. This excellent radon-free (Radon-Free) high-strength marble panel and a method of manufacturing the same.

Most of the stone powder generated in the stone processing process is disposed of as a waste, but a technique for recycling it to a building material through fiberization or crystallization by melting has been developed.

In addition, slag generated in the steelmaking and steelmaking process is largely classified into blast furnace slag and steelmaking slag. Blast furnace slag is a product generated during the process of manufacturing pig iron in a blast furnace, and SiO ₂ and Al ₂ O ₃ present in iron ore, coke, and limestone ash react with lime at high temperatures and are made of cement-like components. According to the cooling method, it is divided into water slag and aggregate slag, and more than 13 million tons are generated annually. Steel slag is produced in the process of removing carbon and silicon components dissolved in molten metal to make steel from iron, and is divided into converter slag and electric furnace slag, which generates more than 10 million tons per year.

As such, various recycling methods for stone powder and slag, which are mostly disposed of, are required.

In general, a melting furnace for melting minerals uses a cupola furnace or an electric furnace. In the case of the cupola furnace, it is possible to increase the size and productivity is high, but since coke is used as a heat source, greenhouse gases such as carbon dioxide are generated during melting, thereby causing environmental pollution and difficulty in controlling the temperature inside the furnace. In addition, in the case of an electric furnace, productivity is lowered, but emission of greenhouse gases can be greatly reduced, temperature control in the furnace is easy, and high temperature conditions of 1,700°C or higher can be created to improve the homogeneity of the melt and stabilize fiber quality. There are advantages. However, the high temperature of 1,700°C or higher, which is required in the melting process of inorganic materials, raises the production cost and is a obstacle to commercialization.

In general, when manufacturing artificial marble or tiles using stone, etc., a mixture of slag or powder sludge and quicklime or thermosetting resin is prepared as in Korean Patent Registration Nos. 10-0882087, 10-1025443, and 10-1566547. After that, since it is cured at 200°C or less without a melting process to produce a molded product, it cannot be applied as a non-combustible product because it is difficult to exhibit non-combustible performance. As in the Republic of Korea Patent Publication No. 10-2004-0016323, after melting the powder and the ceramic material at 1,300~1,600℃, crushing the cooled material, mixing it with plastic resin, curing it at 150℃ or less, and then applying ceramic glaze 1,000 Since the panel is manufactured through a firing process of ~1,300°C, this material has high strength but lacks eco-friendliness.

Generally, natural stone, artificial stone, and tile are used as interior and exterior materials for construction. Natural stone has excellent appearance and is widely used as a finishing material, but it is often used to manufacture relatively inexpensive artificial stone or tile due to high risk and cost of radon gas emission. Artificial stone is a material formed by curing by mixing resin or cement, which is cheaper than natural stone, is lighter, and can produce a variety of colors and textures, but has the disadvantage of lack of heat resistance, chemical resistance, and recycling. Tiles are ceramics made of high-temperature calcined materials, which are excellent in heat resistance and weatherability, but have low impact strength and limited size, and are difficult to remove when contaminated with food, etc.

Republic of Korea Patent Registration No. 10-0882087 Republic of Korea Patent Registration No. 10-1025443 Republic of Korea Patent Registration No. 10-1566547 Republic of Korea Patent Publication No. 10-2004-0016323

The present invention has been devised in consideration of the problems of the prior art as described above, and can replace artificial stone and natural stone that mix resin by recycling materials containing slag and powder, so that the structure is dense and there is no change in color, strength And to provide a radon-free high-strength marble panel having excellent water resistance, weather resistance, corrosion resistance, and chemical resistance, and a method for manufacturing the same.

In addition, since the material is continuously produced by melting and crystallizing the mixture of the slag and the powder, which is a waste, the manufacturing cost can be reduced, and the high-strength marble panel, which is an eco-friendly material having excellent incombustibility and no emission of radon gas, and a method of manufacturing the same The purpose is to provide.

In addition, it does not add resin as a means for curing the melt of the slag and stone powder, and it is economical to recycle solid powder formed in a production process such as cutting and put it into a melting furnace for reuse, and eco-friendly high-strength marble that does not generate production waste. It is an object to provide a panel and a manufacturing method thereof.

The method of manufacturing the high-strength marble panel of the present invention for achieving the above object is slag and granite, gneiss, basalt, limestone, dolomite, malvanite, calcite, feldspar, muscovite, biotite, graphite, sandstone, talc, amphibolite, serpentine, Preparing a ceramic mixture by mixing two or more kinds of stone powders selected from silica, blue, and sumsum stones; Solidifying the ceramic mixture to prepare pellets; Melting the pellet by preheating and heating; Preparing a mixture by mixing the molten material and an inorganic coloring pigment; Compressing the mixture to produce a marble panel; Annealing the compression molded marble panel; Cooling the annealing-treated marble panel; Crystallizing the cooled marble panel; Surface grinding the crystallized marble panel; And cutting the surface-polished marble panel and polishing the cut surface.

At this time, in the step of preparing the ceramic mixture, the slag and powder mixture may be mixed in a weight ratio of 3:7 to 5:5.

In addition, in the step of preheating and heating and melting the pellets, a step of preheating the pellets of the ceramic mixture to a temperature of 800 to 900° C. may be additionally performed before the pellets are introduced into the melting furnace.

Further, in the step of manufacturing the marble panel by compression molding the mixture, the panel may be continuously compressed with a multi-stage rolling roller to cool the panel at a temperature of 1,150°C or higher to a temperature of 950 to 990°C at a temperature drop of 430 to 500 seconds. .

In addition, in the annealing heat treatment step, it can be cooled at a temperature lowering rate of 510 to 650 seconds from a temperature of 950°C or higher to a temperature of 850 to 900°C.

In addition, in the cooling step, it can be cooled at a temperature lowering rate of 85 to 100 seconds from a temperature of 850°C or higher to a temperature of 700 to 750°C.

In addition, after heating at a heating rate of 85 to 100 seconds from a temperature of 700° C. or higher to a temperature of 830 to 880° C. in the crystallization step, the temperature is maintained at 350 to 400 seconds at a temperature of 830 to 880° C. From 700 to 750 ℃ temperature can be cooled at a temperature drop rate of 85 to 100 seconds.

The marble panel according to the present invention is manufactured by the method for manufacturing the marble panel, and has a thickness of 3 to 30 mm, a compressive strength of 300 MPa or more, and a density of 2,600 to 2,950 kg/㎥.

The high-strength marble panel according to the present invention is manufactured by using a material including waste slag and stone powder, and exhibits excellent performance in nonflammability, weather resistance, corrosion resistance, and eco-friendliness.

In addition, since a high-strength marble panel is mass-produced by melting a ceramic mixture containing waste slag and stone powder, it exhibits the effect of resource recycling and low production cost.

In addition, since it does not emit harmful substances, it can be used as an eco-friendly building material that is harmless to the human body, and can provide an import substitution effect for expensive natural marble and tiles.

In addition, the manufacturing method of the marble panel of the present invention can be continued to the production process, so that the size of the panel can be enlarged, so that the price deviation according to the size is severe and the disadvantages of natural marble and tiles that are difficult to process and manufacture can be solved.

In addition, it is possible to reduce the cost of landfill by recycling the waste material, and improve the environment.

1 is a photograph comparing a cross section of a marble panel (a), a natural marble panel (b), an artificial marble panel (c), and a ceramic tile (d) according to the present invention.

Hereinafter, the present invention will be described in more detail. The terms or words used in the present specification and claims should not be interpreted as being limited to ordinary or lexical meanings, and the inventor can appropriately define the concept of terms in order to best describe his or her invention. Based on the principle that it should be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

The high-strength marble panel according to the present invention is two or more selected from slag and granite, gneiss, basalt, limestone, dolomite, pulverite, calcite, feldspar, muscovite, biotite, graphite, sandstone, talc, amphibole, serpentine, quartzite, bluestone, macksum stone, etc. Preparing a ceramic mixture by mixing stone powder; Solidifying the ceramic mixture to prepare pellets; Preheating and heating the pellets to melt; Preparing a mixture by mixing the molten material and an inorganic coloring pigment; Compressing the mixture to produce a marble panel; Annealing the compression-molded marble panel; Cooling the annealing-treated marble panel; Crystallizing the cooled marble panel; Surface grinding the crystallized marble panel; It is manufactured through the steps of cutting the surface-polished marble panel, polishing the cut surface and chamfering.

In addition, after mixing the waste slag and two or more stone powders, pellets are prepared, preheated at a temperature of 800 to 900°C, melted through a process of melting at a temperature of 1,300 to 1,400°C, and then melted through compression molding at 950 to 1,200°C. And it is carried out by crystallization after heat treatment at 700 to 900 ℃. In addition, various color or marble shapes may be implemented on the marble panel by adding 3 to 15% by weight of an inorganic coloring pigment to 100% by weight of the mixture in the molding process after melting. In addition, it is possible to control the surface gloss by various polishing on the surface of the manufactured marble panel and implement various emboss designs.

The marble panel manufactured through the manufacturing method of the present invention can be applied to various uses, and may be used, for example, as a finishing material for building walls or flooring materials, furniture and home appliances. At this time, the characteristics required for the field to be applied include the strength of the material surface, corrosion resistance, chemical resistance, antibacterial property, non-flammability, and beautiful appearance, etc. Due to the low density of the panel through fiberization, it is required as a typical manufacturing process. There is a problem that it is difficult to meet physical properties.

In order to improve the physical properties of the panel, it is also possible to reduce the content of stone powder, increase the content of waste slag, or mix a large amount of materials such as synthetic resins, and manufacture them in a firing method. However, the strength and corrosion resistance, non-flammability, and eco-friendliness of the panel are insufficient. Therefore, in the present invention, the strength and corrosion resistance of the material are performed by preheating the ceramic mixture in which the stone powder mixture and the waste slag are mixed at a temperature of 800 to 900° C., melting at a temperature of 1,300 to 1,400° C., and pressing to crystallize them. , Non-combustible, and eco-friendly.

As the above-mentioned stone powder, two or more stone powders selected from granite, gneiss, basalt, limestone, dolomite, pulverite, calcite, feldspar, muscovite, biotite, graphite, sandstone, talc, amphibole, serpentine, silica, bluestone, and macksumstone are selected and mixed. The mixture is used, and the desired composition can be achieved by controlling the ceramic composition contained in the high-strength marble panel through an appropriate proportion and type of stone. Preferably, it is possible to mix granite or gneiss with dolomite, and by mixing these powders, the content of calcium oxide and magnesium oxide having a relatively low melting point is maintained at an appropriate level to enable fiberization even at relatively low temperatures. . Although it is possible to manufacture a material to be melted even with one type of stone powder, there is a problem in that it is difficult to obtain a composition suitable for lowering the melting temperature, and since it is necessary to produce various colors with the surface of the material, two or more types of stone powder are used in combination. .

In addition, the slag utilizes by-products generated in various processes, and examples of such slag include steel slag and blast furnace slag. It was found that the calcium oxide and the magnesium oxide in the entire ceramic mixture in which the waste slag and the powder mixture were mixed were sufficiently meltable at 1,400° C. or less when the concentrations of the calcium oxide and magnesium oxide were 20 to 30% by weight and 5 to 10% by weight, respectively. This can also be seen from the description that the prior art Republic of Korea Patent No. 10-0208872 has a content of 8 to 20% by weight of calcium oxide and 1 to 9% by weight of magnesium oxide in a composition containing stone powder. . In particular, it has been found that when the content of magnesium oxide is increased, the temperature in the melting process can be lowered to 1,350°C or less.

In addition, the slag and powder mixture is preferably blended in a weight ratio of 3:7 to 5:5, and it has been shown that strength and heat resistance can be improved in the blending range. In addition, before melting the slag and powder mixture, it can be solidified into a pellet form. In this case, it is preferable to prepare pellets in a size of 20 to 30 mm in consideration of the efficiency of the solidification process, input process, and melting process.

The ceramic mixture in the form of pellets of the slag and powder mixture is preheated to 800 to 900°C in order to improve the removal efficiency and the melting efficiency of the residual gas in the ceramic mixture in the melting process, and is injected into an electric furnace to melt at 1,300 to 1,400°C to melt. Manufacturing operations may be performed.

The molten material may be obtained through a warming and stirring section to obtain a molded material, and a process of adding 3 to 15% by weight of the inorganic coloring pigment may be performed during the warming and stirring section. The addition process may be performed at 1,150 to 1,300°C. If the temperature of the mixture is lower than 1,150°C, the inorganic coloring pigment may not be evenly blended.

The mixture that has been subjected to the warming and agitating process is subjected to compression of a high-temperature melt in a compression molding process and continuous compression with a rolling equipment consisting of multi-stage rolls to form a panel. Through the compression molding process, the panel thickness is adjusted, internal pores are removed, and density is uniformized. In addition, the temperature of the molded product of 1,150°C or higher is cooled to 950 to 990°C, and the temperature can be lowered to reach the target temperature within 430 to 500 seconds. In addition, since the additive molding process does not use a separate additive, it is possible to manufacture an eco-friendly panel.

The compression-molded panel undergoes an annealing heat treatment process to eliminate residual stress due to compression molding, to prevent cracking, and to form a compact structure. The range of the heat treatment temperature ranges from a starting temperature of 950 to 990°C and a target temperature of 850 to 900°C. The temperature is lowered to ℃, and the time to reach the target temperature may be 510 to 650 seconds. Preferably, the heat treatment process may be performed at a rate of 9 to 10°C per minute to reach the target temperature in 550 to 600 seconds, while the heat treatment target temperature is lowered to 860 to 890°C.

The annealing heat-treated panel is subjected to a cooling process to increase the strength of the panel. The temperature of the panel is lowered to 700 to 750°C using cooling water, and it is preferable that the rate of temperature decrease is 85 to 100 seconds to the target temperature.

The cooled panel prevents the physical properties of the material from being changed by rapid cooling by performing a secondary heat treatment process, and the internal crystals grow evenly to form homogeneous crystals. In the second heat treatment process, the temperature section may be composed of three steps. The first step is to increase the temperature from the starting temperature of 700 to 750°C to the target temperature of 830 to 880°C. It can be carried out at a heating rate of 77 to 93°C per minute for 85 to 100 seconds, and the second step is 350 at the first step of the target temperature of 830 to 880°C. It may be maintained while maintaining for 400 seconds, and the third stage may be cooled to a target temperature of 700 to 750°C, and at a temperature of 77 to 93°C per minute for 85 to 100 seconds. The cooling may be performed by spraying cooling water having a temperature of 60°C or higher on the panel surface when the temperature of the three-step section is lowered.

The second heat-treated panel may be subjected to a surface treatment process, and the surface gloss of the high-strength marble panel may be adjusted by surface processing through a polishing machine, to improve smoothness, and to implement various textures. In the surface treatment process, an operation of preventing heat generation due to friction and spraying abrasive liquid for cooling of the panel and spraying water for cooling of the panel and cleaning thereof may be performed. Thereafter, a natural cooling process in which the temperature is naturally lowered in air at room temperature may be performed.

The surface-treated panel can be cut into various desired specifications through a cutting process, and the size range of the panel can be variously cut to 300 to 1,300 mm in width and 300 to 5,000 mm in length to be commercialized. Can be.

In general, in the case of natural stone for construction, it has a bending strength of 13 MPa and a compressive strength of 214 MPa or less. In the case of a high-strength tile, it has a bending strength of 45 MPa and a compressive strength of 300 MPa or less. On the other hand, in the case of a high-strength panel, the flexural strength should be 50 MPa or more, and the compressive strength should be 300 MPa or more. In the case of the high-strength marble panel according to the present invention, as described below, the flexural strength is 57 MPa, and the average compressive strength is 358 MPa. Even in comparison, it showed high strength.

In addition, the commonly used building materials and cut surfaces were compared. In the case of the material of the present invention, the outer and inner sides have the same pores and the density is uniform, and the water absorption is very low. In the case of natural stone, the outer and inner sides are the same, but the density is not uniform, there are natural insulating traces, and there are many pores, resulting in high absorption It exhibits disadvantages, and in the case of artificial stone, it is not environmentally friendly because it is produced by physical compression by mixing with an adhesive resin, so it is not environmentally friendly because it cannot be recycled and cannot be recycled. It represents a difficult disadvantage.

Comparing the cross sections of the marble panel (a), the natural marble panel (b), the artificial marble panel (c), and the ceramic tile (d) according to the present invention is as shown in FIG. 1. Compared with natural marble, artificial marble, and conventional ceramic tiles, the marble panel of the present invention shows a smooth cross-section and low surface roughness, and it can be seen that the mixed material is homogeneously distributed and forms a molded body.

In one embodiment, 70% by weight of granite stone powder and 30% by weight of dolomite powder were mixed to prepare a powder mixture, and 60% by weight of the powder mixture and 40% by weight of slag powder were mixed to prepare a ceramic mixture. The prepared ceramic mixture was introduced into a pellet maker to prepare pellets having a size of 20 to 30 mm.

The pellets were preheated to 800°C or higher in a preheating section, charged into an electric furnace, melted at 1,350°C, and then the melt was introduced into a molding frame to perform a compression molding process with a multi-stage rolling roller. The molded panel was found to have a density of 2,850 ㎏/㎥ and was equal to or higher than that of natural stone.

The molded material was subjected to a heat treatment process step-by-step according to the conditions described above in a heat treatment furnace, followed by cooling to produce a high-strength marble panel.

First, in the step of preheating and heating and melting the pellet, the pellet of the ceramic mixture is preheated to a temperature of 850° C. before being put into the melting furnace. In the step of manufacturing the marble panel by compression molding the mixture, the panel is continuously compressed with a multi-stage rolling roller. While forming the mold, the mixture was cooled from 1,200°C to 960°C at a cooling rate of 490 seconds.

Further, in the annealing annealing step, the temperature was cooled from 960°C to 860°C at a cooling rate of 580 seconds, and in the cooling step, from the temperature of 860°C to 740°C, the cooling rate was 92 seconds.

In addition, in the crystallization step, after heating at a heating rate of 92 seconds from 740°C to 860°C, it was maintained at 860°C for 380 seconds, and then cooled to a temperature of 92 seconds from 860°C to 740°C.

Various test evaluations were performed on the specimen (panel 1) cut by the panel prepared as 500×500 mm.

In the strength test, the compressive strength was measured according to the room temperature compressive strength test method of KS L 1601 monolithic ceramics, and it was performed according to the flexural strength test method of concrete of KS F 2407, and the average value according to the 4 times strength test was obtained. As a result, it was confirmed that the high-strength panel can be manufactured by showing the compressive strength of 358 MPa and the bending strength of 57 MPa.

The non-combustibility test was performed according to KS F ISO 1182. Measured for 20 minutes after starting heating at 750℃, the difference between the highest temperature and the final equilibrium temperature is 20℃ or less, and the mass reduction rate should be 30% or less. As a result of the test, the difference between the highest temperature and the final equilibrium temperature for the high-strength marble panel of the present invention was 3°C and the mass reduction rate was 0.3%, indicating that the non-flammability criterion was satisfied and the non-combustibility was excellent.

In addition, the gas hazard test was performed according to KS F 2271. Measure the elapsed time from when the flue gas enters the specimen to when the mouse action stops, but must satisfy the time of 9 minutes or more. As a result of the test, for the high-strength marble panel of the present invention, the average mouse stop time was 13 minutes or more, and thus, excellent results were also observed in gas toxicity.

In addition, the absorbency test was performed according to KS F 3504. As a result of the test, the absorption rate of the high-strength marble panel of the present invention was found to be 0.01%, indicating a very low level of water absorption.

In addition, the radon gas emission measurement test was performed based on the radon measurement of the test article using the HNQI-15 sealed chamber. In the above measurement test, the measurement of the specimen is initiated for 48 hours of continuous measurement, and the domestic indoor radon must meet the standard of 148 Bq/㎥ or less. As a result of the test, the high-strength marble panel of the present invention exhibited a value of 12.1 Bq/m 3, showing an excellent result of about 8% of the legal standard value for radon gas.

In addition, for comparison, several panels were manufactured by varying the mixing ratio of the stone powder mixture and the slag in the same production process as the panel 1. In the case of panel 2, 70% by weight of granite stone powder and 30% by weight of dolomite stone powder are mixed to prepare a powder mixture, and 80% by weight of the powder mixture and 20% by weight of slag powder are prepared as a ceramic mixture, and for panel 3, granite A mixture of 70% by weight of lime powder and 30% by weight of dolomite stone powder is prepared, and a ceramic mixture of 70% by weight of the powder mixture and 30% by weight of slag powder is prepared, and in the case of panel 4, 70% by weight of granite stone powder and 30% by weight of dolomite stone powder is prepared to prepare a stone powder mixture, 50% by weight of the stone powder mixture and 50% by weight of a slag powder is prepared as a ceramic mixture, and in the case of panel 5, 70% by weight of granite stone powder and 30% by weight of dolomite stone powder A mixture was prepared to prepare a stone powder mixture, and a ceramic mixture was prepared by mixing 40% by weight of the stone powder mixture and 60% by weight of slag powder to prepare a marble panel.

In the case of the panels 3 and 4, the physical properties and performance of the panel 1 were similar, but in the case of the panels 2 and 5, the melting temperature was slightly increased, but there was no problem in melting. However, in the compression molding process, cracks and pores were generated and the density was not uniform.

Specifically, panels 2 to 5 were evaluated to have relatively low strength of the panel by showing compressive strengths of 202.4, 199, 214, and 159 MPa, respectively, and bending strengths of 38, 36, 40, and 31 MPa, respectively.

From these results, it was confirmed that the strength and quality of the obtained panel vary depending on the ratio of the ceramic mixture used when manufacturing the high strength marble panel, and that the ratio of the ceramic mixture according to the present invention is effective for the production of the high strength marble panel.

In addition, a marble panel was manufactured with the same composition as the panel 1, but panel 6 to panel 8 were manufactured by changing process conditions.

In panel 6, the panel was manufactured by the same temperature program as the manufacturing process of panel 1, but the panel formed by continuous compression was cooled from 1,200°C to 960°C at a cooling rate of 300 seconds to increase the cooling rate.

In addition, the panel 7 was manufactured in the same temperature program as the manufacturing process of panel 1, but in the step of annealing heat treatment, the temperature was cooled from 960°C to 860°C at a cooling rate of 450 seconds.

In addition, in panel 8, manufactured by the same temperature program as the manufacturing process of panel 1, heated at a heating rate of 120 seconds from 740°C to 860°C in the crystallization step, and then maintained at 860°C for 200 seconds, and then the 860°C The temperature was cooled to a temperature of 740°C at a cooling rate of 120 seconds.

As a result of the test evaluation on panels 6 to 8, the compressive strengths were 185, 192, and 215 MPa, respectively, and the bending strengths were 33, 31, and 42 MPa, respectively, indicating that they were difficult to commercialize because they did not meet the strengths required for high-strength panels. Therefore, it was confirmed that optimizing the temperature program in manufacturing the marble panel directly affects the quality of the product.

Although the present invention has been described with reference to the preferred embodiments as described above, it is not limited to the above embodiments and various modifications and modifications can be made by those skilled in the art to which the present invention pertains without departing from the spirit of the present invention. Changes are possible. Such modifications and variations are to be regarded as falling within the scope of the invention and appended claims.

Claims (8)

A ceramic mixture is prepared by mixing two or more stone powders selected from slag and granite, gneiss, basalt, limestone, dolomite, pulverite, calcite, feldspar, muscovite, biotite, graphite, sandstone, talc, amphibole, serpentine, silica, bluestone, and macksumseok. To do;
Solidifying the ceramic mixture to prepare pellets;
Melting the pellet by preheating and heating;
Preparing a mixture by mixing the molten material and an inorganic coloring pigment;
Compressing the mixture to produce a marble panel;
Annealing the compression molded marble panel;
Cooling the annealing-treated marble panel;
Crystallizing the cooled marble panel;
Surface grinding the crystallized marble panel;
Cutting the surface-polished marble panel and polishing the cut surface;
It includes,
The step of crystallization is heated at a heating rate of 85 to 100 seconds from a temperature of 700° C. or higher to a temperature of 830 to 880° C., and maintained at a temperature of 830 to 880° C. for 350 to 400 seconds, followed by 700 at the holding temperature. Method of manufacturing a high-strength marble panel, characterized in that the cooling at a temperature drop rate of 85 to 100 seconds to a temperature of 750 ℃.
The method according to claim 1,
In the step of preparing the ceramic mixture, the slag and the powder mixture is mixed in a weight ratio of 3:7 to 5:5.
The method according to claim 1,
The method of manufacturing a high-strength marble panel, characterized in that the step of preheating and heating and melting the pellet further performs a step of preheating the pellets of the ceramic mixture to a temperature of 800 to 900° C. before being introduced into the melting furnace.
The method according to claim 1,
The step of manufacturing the marble panel by compression molding the mixture is characterized by cooling at a temperature drop rate of 430 to 500 seconds from a temperature of 1,150°C or higher to a temperature of 950 to 990°C while continuously compressing the panel with a multi-stage rolling roller. Method for manufacturing high strength marble panel.
The method according to claim 1,
The annealing heat-treating step is a method of manufacturing a high-strength marble panel, characterized by cooling at a temperature of 510 to 650 seconds from a temperature of 950°C or higher to a temperature of 850 to 900°C.
The method according to claim 1,
The cooling step is a method of manufacturing a high-strength marble panel, characterized in that cooling at a temperature of 85 to 100 seconds at a temperature of 700 to 750 ℃ at a temperature of 850 ℃ or higher.
delete A marble panel manufactured by the method for manufacturing a marble panel according to claim 1, wherein the marble panel has a thickness of 3 to 30 mm, a compressive strength of 300 MPa or more, and a density of 2,600 to 2,950 kg/㎥. Marble panels.

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