KR101468093B1 - Antimicrobial ceramic and oxide-containing epoxy resin coating method for manufacturing a steel tube - Google Patents

Antimicrobial ceramic and oxide-containing epoxy resin coating method for manufacturing a steel tube Download PDF

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KR101468093B1
KR101468093B1 KR1020140077338A KR20140077338A KR101468093B1 KR 101468093 B1 KR101468093 B1 KR 101468093B1 KR 1020140077338 A KR1020140077338 A KR 1020140077338A KR 20140077338 A KR20140077338 A KR 20140077338A KR 101468093 B1 KR101468093 B1 KR 101468093B1
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steel pipe
coating
jade
epoxy resin
ceramic
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KR1020140077338A
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Korean (ko)
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최갑정
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(주) 케이 앤 지 스틸
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/87—Ceramics
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/14—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying for coating elongate material
    • C23C4/16—Wires; Tubes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • General Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The present invention relates to a method to manufacture a steel tube having an epoxy resin coating layer containing antibacterial ceramics and jade. More specifically, the method to manufacture the steel tube having the epoxy resin coating layer containing the antibacterial ceramics and jade is configured to coat an epoxy resin containing the antibacterial ceramics and jade composed of amphibole and sphalerite which are materials for improving the environment on an inner surface of the steel tube with a coated external diameter; and to utilize far infrared ray radiation efficiency of antibacterial substance and the jade, sterilization, and antibiotic and anti-virus capacity in accordance to a ceramics compound mixed with the amphibole and sphalerite, thereby enabling to be used as an antibiotic. Therefore, a far infrared ray effect, an antibacterial function, a deodorization function, and a purification function can be maximized; and a product and an action which is useful to the human body can be stabilized.

Description

TECHNICAL FIELD [0001] The present invention relates to an antimicrobial ceramic and an epoxy resin coating method for manufacturing a steel tube,

The present invention relates to a method for manufacturing a steel pipe having an antibacterial ceramic and an epoxy resin coating layer containing ox, and more particularly, to a method for manufacturing an antimicrobial ceramic and an oxide The antimicrobial effect of antimicrobial materials mixed with hornblende and sphalerite and antimicrobial effect that can provide the benefit of antimicrobial effect by utilizing the far-infrared radiation efficiency of jade, the suppression of bacterial propagation, and the sterilization and antibacterial ability The present invention relates to a method of manufacturing a steel pipe having an epoxy resin coating layer containing ceramics and jade.

In general, pipes are used for various purposes in various kinds of prefabricated structures, and these pipes are mainly made of a metal such as steel. In recent years, pipes having a metal surface treatment, a pipe coated with liquid paint, Coated pipes coated with synthetic resin have been widely used. In particular, the synthetic resin coated pipe can be provided with an exquisite appearance by processing various colors on its outer surface depending on the color of the synthetic resin to be coated.

These pipes, which are used as water supply and drainage pipes, use mostly steel pipes due to high water pressure. The steel pipe is coated on the inner and outer surfaces to prevent corrosion by the fluid. At this time, a liquid resin or a resin powder is used as a coating material for coating the steel pipe.

In the coating method of the steel pipe using powder, the surface of the steel pipe is pre-treated so that the paint is adhered well, and the steel pipe is preheated to about 200 to 230 ° C by using a heating device. Next, powder coating is sprayed on the preheated steel pipe at a constant thickness. Then, the powder coating is melted by the heat of the steel pipe and hardened to form a coating film.

However, it is difficult to expect effects such as the effect of preventing the corrosion of the coating film from the contact between the liquid phase and the metal material and the effect of maintaining the state of the steel pipe for a long period of time and improving the quality of the liquid phase, It is a reality.

On the other hand, far-infrared energy emitting materials are various. There are various products such as jade, oak charcoal, and elvan. Tourmaline was used in diluted water, and it was about to be made with adhesive-free mixed sheet. However, the far infrared ray energy emissivity of these products was about 40 to 100 탆. The most purity jade tested was about 100 μm.

First, jade has various supernatural and mysterious effects as recorded in Oriental medicine's Dongbok-gog and Bon-gok gangmok. Among these efficacies, far-infrared radiation function, antibacterial activity Function, the function of removing impurities from the object (removal of heavy metals), and the function of changing hard water to soft water.

Jade is divided into nephrite and jadeite. Mineralogically, jadeite is an optical material of monoclinic whitish stone of inosilicate. The quality of nephrite is the structure of its fine structure, It is composed of silica, calcium, iron, magnesium, etc. (SiO 2 , MgO, Fe 2 O, CaO, Na 2 O, H 2 O) as main components. These ingredients are necessary for the growth of plants and animals, antibacterial, fungicidal, deodorizing effect, such as water purification functions that cause far-infrared rays

Is known to radiate a large amount of radiation.

Secondly, it is found that far infrared ray radiator far infrared ray emits far infrared rays when containing specific elements among natural minerals, and radiation energy is emitted as the content and purity of the specific elements are higher. Far infrared crystals (chemical composition SiO 2 , Al 2 O 3 ) synthesis materials have been developed by applying these properties to porous crystals having a radiation intensity twice as high as that of natural minerals. By adding the far infrared ray radiation synthesizing material to the epoxy coating composition, it is possible not only to maximize the function of the jade, but also to exert an excellent effect on the adsorption action of the pollution substance which is the main cause of the water pollution due to the porous property.

Third, the synthetic non-toxic inorganic antibacterial agent (SiO 2, Al2O 3, Zn, Ag) zeolite carrier: antimicrobial metal (Zn, Ag) to the (chemical composition Me2 / n, O, Al2O 3 , xSiO 2, yH 2 O) , Which is a non-toxic antimicrobial agent, is added to the main composition of epoxy coatings to exhibit strong growth inhibition and killing ability through contact with various microorganisms. Also, unlike organic antimicrobial agents, it is stable at high temperatures and has no volatility or leaching. .

Conventional Epoxy Coating Compositions Existing epoxy coating compositions are prepared by dispersing and mixing non-toxic pigments, talc, barium sulfate and additives in the epoxy resin base composition. Typical applications include iron, wood and flooring, and inner coatings of concrete structures and pools . However, since such conventional epoxy coatings do not have functionality such as far-infrared radiation effect, antibacterial action, deodorization, and water purifying action as described above, when coated on the inner surface of an indoor swimming pool, Can not be inhibited from growing, and can not perform deodorization, removal of heavy metals, and purifying action, thereby adversely affecting the human body.

In addition, antimicrobial coating agents, which are widely used in various industrial products, household appliances and sanitary products, are coating methods for thin film formation, and it is difficult to continue the effect for more than 6 months due to limitation of inhibiting propagation of essential bacteria and fungi. Antimicrobial and antibacterial coatings are prepared by adding disinfectants and antiseptics to some paints. However, when these antimicrobial agents are used, they contain harmful components in the human body. It does not last for a long period of time, and its performance can not be maintained relative to an expensive construction cost.

On the other hand, Patent Registration No. 0806942 (registered on Mar. 2, 2008, 2008) filed by the applicant of the present invention includes a surface treatment step of removing foreign matter scattered on the inner and outer surfaces of a steel pipe by shot blasting;

Wherein the steel pipe processed in the surface treatment step is placed on a rotating means disposed inside a heating chamber which is openable and closable so that a plurality of flame outlets are formed and the steel pipe is heated by the contact of the flame sprayed from the flame outlet A preheating step of heating a steel pipe rotated by the rotating means with a gas torch;

An outer surface coating step of sequentially coating powder epoxy, modified polyethylene and polyethylene on the outer surface of the preheated steel pipe;

A cooling step of cooling the outer surface coated steel pipe;

A plurality of ceramic paint conveyance pipes for conveying the ceramic paint to the inner surface of the steel pipe, one end of which is connected to the ceramic sprayer and the other end is drawn to the inner surface side of the steel pipe, And an inner surface coating step of coating the inner surface of the cooled steel pipe with a ceramic paint using an inner surface coating means composed of a spray nozzle for spraying the ceramic paint onto the inner surface of the steel pipe,

Wherein the inner surface coating step includes a step of rotating the steel pipe in the forward rotation when the ceramic paint transfer pipe of the inner surface coating means is drawn into the steel pipe and rotating the steel pipe in the reverse direction when the ceramic paint transfer pipe is drawn out of the steel pipe. Layer polyethylene and ceramics on steel pipes. However, it has a disadvantage that it can not provide a function to inhibit water pollution because it can not provide antibacterial and fungicidal properties and improve water quality due to the effect of releasing far-infrared rays.

Literature 1. Patent Registration No. 0361555 (registered on November 06, 2002) Document 2. Patent Publication No. 2005-0048557 (disclosed on May 24, 2005) Literature 3. Patent Registration No. 0427682 (registered on Apr. 04, 2004) Document 4. Patent Publication No. 2005-0043826 (disclosed on May 11, 2005)

Accordingly, it is an object of the present invention to solve the above-described drawbacks of the prior art, and it is an object of the present invention to provide a method for producing an iron- , A deodorizing function, and a purifying function of water, and can exhibit a beneficial action to the human body and stabilization of the product.

Another object of the present invention is to provide hygienic and long-term durability by freely adjusting the inner surface coating of the steel pipe product by applying powder by a ceramic mixture composed of jade, hornblende and sphalerite.

The present invention relates to a method of manufacturing a steel pipe, comprising: a surface treatment step of removing impurities scattered on inner and outer surfaces of a steel pipe by shot blasting; A preheating step of placing the steel pipe processed in the surface treatment step on two rotating rollers provided on a rotating device and heating the steel pipe with a gas torch of a heating device; An outer coating step of sequentially coating an epoxy coating layer, an adhesive resin layer and a polyethylene coating layer on an outer surface of the preheated steel pipe in an outer surface coating apparatus; A cooling step of cooling the outer surface coated steel pipe in a cooling device using water or air; An inner surface coating step of coating an inner surface of the cooled steel pipe with an inner surface coating apparatus; The method comprising the steps of:
A ceramic mixture processing step of processing amphibolite and sphalerite to a size of 200 to 600 mash;
A ceramic mixture mixing step of mixing the processed hornblende and sphalerite;
A step of milling jade to be mixed with the ceramic mixture to a size of 200 to 600 mash and processing the mixture to a purity of 95 to 99 wt% and a water content of 0.03 to 0.5 wt%;
A coating comprising 25 to 70 parts by weight of an epoxy resin, 5 to 15 parts by weight of a ceramic mixture, 10 to 45 parts by weight of an oxalate powder and 20 to 50 parts by weight of a ceramic filler after the surface treatment step, preheating step, outer surface coating step and cooling step Coating an inner surface of the steel pipe with a thickness of 220 to 300 탆 while rotating the steel pipe in a normal direction and coating the steel pipe with a thickness of 440 to 600 탆 by rotating the steel pipe while rotating in the opposite direction And the like.

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The present invention relates to a process for the production of a cement admixture comprising a mixture of jade powder having a powder purity of from 95 to 99% by weight and a water content of from 0.03 to 0.5% by weight and a size of from 200 to 600 mash, It is possible to simultaneously exhibit an antimicrobial function, a deodorizing function, and a water purifying function for destroying bacteria caused by far-infrared ray radiation by mixing the ceramic mixture to be mixed, and to provide an effect of exerting a beneficial action to the human body.

The present invention provides an effect of greatly improving hygiene and long-term durability by freely adjusting the inner surface coating of the steel pipe product by applying powder by a ceramic mixture composed of jade, hornblende and sphalerite.

1 is a perspective view showing a state in which a steel pipe according to the present invention is rotated and heated;
2 is an enlarged front view of a main portion showing a state of coating the inner surface of a steel pipe according to the present invention
3 is a schematic view of the inner surface coating apparatus of a steel pipe according to the present invention
4 is a schematic view of a steel pipe coating apparatus of the present invention
5 is a block diagram for explaining the steel pipe coating method of the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a state in which a steel pipe according to the present invention is rotated and heated, FIG. 2 is an enlarged front view of a main part showing a state of coating the inner surface of a steel pipe according to the present invention, FIG. 3 is a schematic view of a steel pipe inner surface coating device 4 is a schematic view of the steel pipe coating apparatus of the present invention.

The inner and outer surface coating apparatus of a steel pipe according to the present invention is provided with a rotating device 30 disposed inside a heating chamber 10 configured to be openable and openable on the side and horizontally rotating the steel pipe 20 in a state where the steel pipe 20 is seated, A heating device 40 disposed inside the heating chamber 10 and disposed below the rotating device 30 to heat the steel pipe 20 and a heating device 40 for heating the steel pipe 20 heated by the heating device 40. [ A surface coating device 50 for sequentially coating an epoxy coating layer 22, an adhesive resin layer 23 and a polyethylene coating layer 24 on the surface of the substrate 20, A cooling device 60 for cooling the steel pipe 20 using air or water and an inner surface coating device 70 made of silver oxide and epoxy resin on the inner surface of the steel pipe cooled by the cooling device 60 do.

The heating chamber 10 is configured to be openable and closable so as to prevent the coating quality from being degraded by soot generated by the heating device 40. The heating device 40 is composed of a gas torch,

When the flame coming from the flame outlet 40a of the gas torch is incompletely burned, soot is generated, which is attached to the surface of the steel pipe 20 to prevent the surface coating material to be subsequently coated from being properly coated on the steel pipe, . Therefore, if the side surface of the heating chamber 10 is configured to be openable and closable, the soot can escape to the open space, thereby preventing the coating peeling phenomenon.

The rotating device (30) is constituted by a rotating roller which is installed in close contact with both end surfaces of the steel pipe (20). This rotating roller is connected to a motor M disposed outside the heating chamber 10. [

The heating device 40 includes a plurality of flue gas outlets 40a and a gas torch through which the flame is injected from the flame outlet 40a. The gas torch is installed such that the flame outlet 40a is positioned below the steel pipe that is placed on the rotating roller.

The flame injected from the flame outlet 40a arranged in this way directly contacts the bottom surface of the steel pipe 20 rotated on the upper side of the rotating roller to heat the steel pipe. Therefore, the time required for heating the steel pipe 20 to a temperature suitable for coating is shortened, fuel consumption is reduced, productivity can be improved, and costs can be reduced.

The surface coating apparatus 50 uses any one of the conventional powder coating method and the coating method used in the extrusion coating method, which is well known to those skilled in the art, so that a description thereof will be omitted .

The inner surface coating apparatus 70 includes an epoxy sprayer 72 in which an epoxy resin is stored and an epoxy sprayer 72 having one end connected to the epoxy injector 72 and the other end drawn into the inner surface of the steel pipe 20, And an injection nozzle 76 provided at the other end of the ceramic paint transfer pipe 74 and sprayed to the inner surface of the epoxy steel pipe 20. The epoxy paint transfer pipe 74 is provided at the other end of the ceramic paint transfer pipe 74,

The epoxy sprayer 72 is installed on the lower side to be movable so that the epoxy paint transfer pipe 74 can be moved into and out of the steel pipe 20.

The plurality of epoxy paint transfer tubes (74) are bent so that the other end sides drawn into the interior of the steel pipe (20) face in different directions. An injection nozzle 76 is installed at the other end of the bent epoxy paint transfer pipe 74. Accordingly, the epoxy paint can be sprayed on the inner surface of the steel pipe 20 without any gaps, and even if a thick coating layer is desired, the work can be completed with only a few steps.

A method of coating a steel pipe according to the present invention comprises: a step (S10) of processing a ceramic mixture to be processed, each of which comprises a hornblende and a sphalerite;

(S20) mixing the processed hornblende and sphalite to produce a ceramic mixture;

A jade processing step (S30) of processing jade to be mixed with the scarlet ceramic mixture;

A surface treatment step (S40) of removing impurities scattered on the inner and outer surfaces of the steel pipe (20) by shot blasting after processing the ceramic mixture and jade;

The preheating step S50 (in which the steel pipe 20 treated in the surface treatment step S40 is placed on the two rotating rollers 30 according to the present invention and heated by the gas torch of the heating device 40 according to the present invention, )Wow;

An outer surface coating step (S60) of sequentially coating the epoxy coating layer (22), the adhesive resin layer (23) and the polyethylene coating layer (24) on the outer surface of the preheated steel pipe (20) in the outer surface coating device (50);

A cooling step (S70) of cooling the outer surface coated steel pipe (20) in the cooling device (60) using water or air;

And an inner surface coating step (S80) in which the inner surface of the cooled steel pipe (20) is coated with an inner surface coating device (70) by mixing jade and polyethylene.

The ceramic mixture processing step (S10) and the ceramic mixture mixing step (S20) for processing the amphibolite and sphalite are crushed to a size of 200 to 600 mash and 5 to 15 parts by weight of the total weight of the coating material;

50 to 90 parts by weight of biotite and 10 to 50 parts by weight of sphalerite are mixed and mixed with a ceramic mixture.

(S30) for processing jade to be mixed with the processed ceramic mixture is milled to a size of 200 to 600 mash and has a purity of 95 to 99 wt% and a moisture content of 0.03 to 0.5 wt% 35 parts by weight.

The oxide is FT-IR emissivity (5~20㎛) cheukche compared with 0.93 spectral radiant energy (W / ㎡, ㎛, 40 ℃) 3.74 × 10 2, a hardness of 5 to 5.5, the chemical composition of SiO 2, Fe 2 O 3 , CaO, MgO, K 2 O and Na 2 O, and is used in a range of 10 to 45 parts by weight based on the total weight of the coating material. When less than 10 parts by weight is used, When 45 parts by weight or more is used, there is a problem that pulverization and dispersion can not be performed due to a decrease in physical properties and viscosity of the paint.

The surface treatment step S40 is a step of removing rust or oil components and foreign substances from the inner and outer surfaces of the steel pipe 20 by shot blasting so as to prevent peeling of the coating material to be coated later, 5: 5 ratio, and performing 15 to 20 revolutions per minute.

The preheating step S50 is a step of raising the steel pipe 20 by a desired temperature so that the epoxy, the adhesive, and the polyethylene are firmly coated on the surface-treated steel pipe 20 by the surface temperature.

In order to perform such a process, the gas torch according to the present invention is used, and the flame coming from the flame outlet 40a of the gas torch is directly contacted to the surface of the steel pipe.

In the outer surface coating step S60, the epoxy coating layer 22 is coated on the surface of the steel pipe 20, the adhesive resin layer 23 is coated on the epoxy resin layer 23, and the polyethylene coating layer 24 ).

The epoxy coating layer 22 is coated to a thickness of 80 to 120 탆, the adhesive resin layer 23 is coated to a thickness of 120 to 200 탆, the polyethylene coating layer 24 is coated to a thickness of 200 to 250 탆, 40 to 50 rotations per minute.

In the inner surface coating step S70, when the paint transfer pipe 74 of the inner surface coating apparatus 70 is drawn into the steel pipe 20, the rotating roller disposed below the steel pipe 20 is rotated forward, When the ceramic paint transfer pipe 74 is drawn out of the steel pipe 20, the rotating roller disposed below the steel pipe 20 is rotated in the reverse direction, The steel pipe 20 disposed on the upper side of the steel pipe 20 is reversely rotated. Therefore, even when the weld bead 20a is formed in the steel pipe 20, it is possible to uniformly coat the periphery of the weld bead 20a as shown in Fig.

The paint is prepared by blending 25 to 70 parts by weight of an epoxy resin, 200 to 600 mash, and 5 to 15 parts by weight of the total weight of the paint, and having a purity of 95 to 99 parts by weight 10 to 45 parts by weight of a jade powder having a water content of 0.03 to 0.5 parts by weight, and 20 to 50 parts by weight of a ceramic filler.

The polyethylene resin coating layer 25 for coating the paint on the inner diameter of the steel pipe 20 is coated while entering the steel pipe 20 at a thickness of 220 to 300 탆 at a time, It is preferable to coat the substrate to a thickness of 440 to 600 mu m.

Although the thickness for coating the polyethylene resin coating layer 25 has been described in detail above, it is possible to control the thickness through the control of the rpm, the conveyance speed and the coating number through the ceramic mixture composed of jade, amphibolite and sphalerite , Thereby greatly improving hygiene and long-term durability as compared with conventional products.

The present invention relates to a method of coating a ceramic mixture comprising a hornblende, a sphalerite, and an epoxy resin, which is an environment improving material, on an inner surface of an outer diameter coated steel pipe to control the far infrared radiation efficiency of the ceramic mixture and the jade, To be used as an antibiotic.

10: heating chamber 20: steel pipe
21: metal layer 22: epoxy coating layer
23: Adhesive resin layer 24: Polyethylene coating layer
25: Epoxy resin coating layer 30: Rotating device
40: Heating device 50: External coating device
60: cooling device 70: external coating device
72: Epoxy paint sprayer 74: Epoxy paint transfer pipe
76: injection nozzle

Claims (4)

A surface treatment step (S40) of removing impurities scattered on the inner and outer surfaces of the steel pipe (20) by shot blasting; A preheating step (S50) of placing the steel pipe (20) treated in the surface treatment step (S40) on two rotating rollers provided on the rotating device (30) and heating the steel pipe with a gas torch of the heating device (40); An outer surface coating step (S60) of sequentially coating the epoxy coating layer (22), the adhesive resin layer (23) and the polyethylene coating layer (24) on the outer surface of the preheated steel pipe (20) in the outer surface coating device (50); A cooling step (S70) of cooling the outer surface coated steel pipe (20) in the cooling device (60) using water or air; An inner surface coating step (S80) in which the inner surface of the cooled steel pipe (20) is coated with an inner surface coating device (70); The method comprising the steps of:
A ceramic mixture processing step (S10) of processing the amphibole and sphalerite to a size of 200 to 600 mash, respectively;
A ceramic mixture mixing step (S20) of mixing the processed hornblende and sphalerite;
(S30) for milling jade to be mixed with the ceramic mixture to a size of 200 to 600 mash and processing the mixture to a purity of 95 to 99 wt% and a water content of 0.03 to 0.5 wt%;
After the surface treatment step S40, the preheating step S50, the outer surface coating step S60 and the cooling step S70, 25 to 70 parts by weight of an epoxy resin, 5 to 15 parts by weight of a ceramic mixture, And 20 to 50 parts by weight of a ceramic filler is coated while entering the steel pipe 20 in a thickness of 220 to 300 탆 while rotating the steel pipe 20 in the forward direction, (S80), wherein the coating step is performed so as to have a thickness of 440 to 600 mu m. The method for manufacturing a steel pipe having an antibacterial ceramic and an epoxy resin coating layer containing oxine.
The method according to claim 1,
The jade powders in the jade processing step (S30) had an emissivity (5 to 20 탆) of 0.93 radiant energy (W / ㎡ m ㎛, 40 캜) of 3.74 × 10 2 and a hardness of 5 to 5.5 using a FT- And a coating layer of an epoxy resin containing jade.
The method according to claim 1,
Wherein the ceramic mixture mixing step (S20) is performed by mixing 50 to 90 parts by weight of hornblende and 10 to 50 parts by weight of sphalerite with an epoxy resin coating layer containing an antimicrobial ceramic and jade. delete
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