KR100962246B1 - Carbon grounding electrode and manufacturing method thereof - Google Patents

Carbon grounding electrode and manufacturing method thereof Download PDF

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KR100962246B1
KR100962246B1 KR1020090123129A KR20090123129A KR100962246B1 KR 100962246 B1 KR100962246 B1 KR 100962246B1 KR 1020090123129 A KR1020090123129 A KR 1020090123129A KR 20090123129 A KR20090123129 A KR 20090123129A KR 100962246 B1 KR100962246 B1 KR 100962246B1
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dry material
coal
based coke
graphite
coke
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Korean (ko)
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정용기
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(주)의제전기설비연구원
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/522—Graphite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Products (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

PURPOSE: A graphite ground resistance and a cored bar manufacturing method for the graphite ground resistance are provided to keep predetermined resistance in an external environment change by forming a cored bar with carbon and keeping moisture. CONSTITUTION: Pulverization and selective separation of a coal-type coke material are performed(S110). The material is mixed in a material mixing system(S120). A dry material is kneaded in a kneading machine(S130). The dry material is shaped in an extruding machine(S140). Roasting of the dry material is performed(S150). The dry material is impregnated(S160). A carbon cored bar for ground electrode is completed by processing of the dry material(S180).

Description

흑연 접지 저항체 및 흑연 접지 저항체용 심봉 제조방법{CARBON GROUNDING ELECTRODE AND MANUFACTURING METHOD THEREOF}Manufacturing method of graphite grounding resistor and mandrel for graphite grounding resistor {CARBON GROUNDING ELECTRODE AND MANUFACTURING METHOD THEREOF}

본 발명은 흑연 접지 저항체 및 흑연 접지 저항체용 심봉 제조방법에 관한 것으로, 심봉이 카본으로 형성되어 현재의 철, 구리, 스테인리스로 되어 있는 심봉을 비철금속으로 대체하고, 수분을 흡수, 유지함으로써 외부 환경변화에도 일정한 저항을 유지하는 흑연 접지 저항체 및 흑연 접지 저항체용 심봉 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a graphite grounding resistor and a mandrel for a graphite grounding resistor, wherein the mandrel is formed of carbon and replaces a current mandrel made of iron, copper, or stainless steel with a non-ferrous metal, and absorbs and retains moisture to change the external environment. The present invention relates to a graphite grounding resistor and a mandrel for graphite grounding resistor for maintaining a constant resistance.

일반적으로 접지 장치(grounding device)는 통신 장비, 전자 계측 장비, 피뢰 장치 및 전력 장비 등을 전기적으로 대지와 연결시켜 장비에 작용하는 과부하나 낙뢰 등에 의한 서지 전압을 지상으로 흘려 보낼 수 있도록 하는 장치를 말하며, 그 대표적인 예로 구리 접지봉(Copper grounding rod)을 들 수 있다. In general, a grounding device is a device that electrically connects communication equipment, electronic measuring equipment, lightning arresters, and power equipment with the ground to send a surge voltage caused by an overload or lightning strike on the equipment. The representative example is a copper grounding rod.

이러한 접지 장치(이하, 접지봉을 일예로 설명한다.)는 돌침부, 피뢰도선 및 접지 전극을 피뢰 도선으로 연결함으로써 접지 기능을 수행하게 된다. 따라서, 접 지 전극은 돌침부에 작용하는 전기적 부하를 신속하게 대지로 방전하기 위하여 항상 낮은 저항과 낮은 과도임피던스 특성을 유지할 것이 요구된다. The grounding device (hereinafter, the grounding rod will be described as an example) performs a grounding function by connecting the protrusion, the lightning conductor, and the ground electrode with the lightning conductor. Therefore, the ground electrode is required to maintain low resistance and low transient impedance at all times in order to quickly discharge the electrical load acting on the protrusion to the ground.

이를 위하여 종래에는 본 발명의 출원인이 출원한 한국등록특허 제10-0610604호에 개시된 바와 같이 전기 전도성이 우수한 흑연 등의 흑연계 비금속 광물과 전해질로 구성된 저 저항체 내부에 금속재 심봉이 박힌 형태의 흑연접지모듈을 사용하였다. To this end, conventionally, as described in Korean Patent No. 10-0610604 filed by the applicant of the present invention, a graphite ground having a metal mandrel embedded in a low resistance body composed of an electrolyte and a graphite nonmetallic mineral such as graphite having excellent electrical conductivity. The module was used.

한편, 낙뢰를 형성하는 뇌운의 경우, 계절에 따라 예를 들면, 하절기에 (-)전하를 과도하게 포함하거나 동절기에 (+)전하를 과도하게 포함하게 된다. 이와 같이 낙뢰가 발생할 경우 종래의 흑연 접지 모듈은 전기 전도성이 우수하기 때문에 하절기에는 뇌운의 (-)전하를 급격하게 대지로 유입시키고, 동절기에는 대지의 (-)전하를 뇌운으로 급격하게 유출시킨다. On the other hand, in the case of a thundercloud forming a lightning strike, depending on the season, for example, excessive (+) charge in the summer or excessive (+) charge in the winter. As such, when a lightning strike occurs, the graphite grounding module of the related art has excellent electrical conductivity, so that the negative charge of thundercloud rapidly enters the earth during the summer, and the negative charge of the earth rapidly flows out to the thundercloud during the winter season.

이때 종래의 흑연접지모듈은 흑연 소재 등을 사용하여 낮은 접지저항을 유지하여 구리동봉보다는 뛰어난 접지특성으로 서지전압을 대지로 신속히 전달할 수 있었으나 동과 흑연소재와 토양 간에는 저항차이로 인하여 서지진행파가 대지로 진행되는 것에 장애가 있었다.In this case, the conventional graphite grounding module maintains low ground resistance by using graphite material, so it can transfer the surge voltage to the ground quickly with better grounding characteristics than copper bars, but the surge progression wave is caused by the difference of resistance between copper and graphite material and soil. There was an obstacle to going on.

이러한 장애의 원인은 이질 재질 간의 저항값의 차이에 의하여 발생하는 것이다.The cause of this failure is caused by the difference in resistance values between different materials.

또한, 종래의 금속재 심봉은 부식에 취약한 문제점이 있엇다.In addition, the conventional metal mandrel has a problem that is vulnerable to corrosion.

덧붙여, 부식에 취약한 금속재 심봉의 특성상 수분을 흡수 유지할 수 없으므로 외부 환경변화에 의한 일정한 저항을 유지하기 어려웠다.In addition, it is difficult to maintain a constant resistance due to external environmental changes because it can not absorb water due to the characteristics of the metal mandrel vulnerable to corrosion.

본 발명은 전술한 종래의 제반 문제점을 해결하기 위하여 안출된 것으로, 심봉이 카본으로 형성되어 수분을 흡수, 유지함으로써 외부 환경변화에도 일정한 저항을 유지하는 흑연 접지 저항체 및 흑연 접지 저항체용 심봉 제조방법을 제공하는데 있다.The present invention has been made to solve the above-mentioned problems in the prior art, the core rod is formed of carbon absorbs and retains the moisture by maintaining a constant resistance to graphite grounding resistor and graphite grounding resistor for the external ground change method To provide.

상기와 같은 목적을 달성하기 위한 본 발명의 흑연 접지 저항체는, 흑연계 저저항체; 및 상기 흑연계 저저항체의 중앙에 설치되는 흑연계 심봉;을 포함하는 것을 특징으로 한다.Graphite grounding resistor of the present invention for achieving the above object is a graphite-based low resistor; And a graphite core rod installed at the center of the graphite low resistance body.

또한, 상기 심봉은, 20~30㎜의 입도인 대형 석탄계 코크스와, 10~20㎜의 입도인 중형 석탄계 코크스 및 0.002~0.089㎜ 이하의 입도를 가지는 소형 분말 석탄계 코크스로 구성되는 건조재료; 상기 건조재료와 함께 투입되는 접착제; 및 상기 건조재료에 첨가되는 첨가제;를 포함하되, 상기 첨가제는 스테아린산, Fe2O3철분 및 그린 스크랩을 포함하는 것이 바람직하다.In addition, the core rod is a dry material composed of a large coal-based coke having a particle size of 20 to 30mm, a medium coal-based coke having a particle size of 10 to 20mm and a small powder coal-based coke having a particle size of 0.002 to 0.089mm or less; An adhesive added with the dry material; And an additive added to the dry material; preferably, the additive includes stearic acid, Fe 2 O 3 iron, and green scrap.

그리고, 상기 건조재료는 중량 백분율 기준으로 상기 대형 석탄계 코크스 35~40중량%와, 중형 석탄계 코크스 15~20중량%와, 소형 분말 석탄계 코크스 35~40중량%가 포함되는 것이 바람직하다.In addition, the dry material preferably contains 35 to 40% by weight of the large coal-based coke, 15 to 20% by weight of medium coal-based coke, and 35 to 40% by weight of small powder coal-based coke.

한편, 총 중량 중 상기 건조재료가 차지하는 비중은 60~68.7%, 상기 접착제는 25~30%, 상기 스테아린산은 0.5~0.8%, Fe2O3철분은 0.1~0.5%를 점하는 것이 바람직하다.Meanwhile, the specific gravity of the dry material in the total weight is 60 to 68.7%, the adhesive is 25 to 30%, the stearic acid is 0.5 to 0.8%, Fe 2 O 3 It is preferable that the iron content is 0.1 to 0.5%.

본 발명의 접지 저항체용 심봉 제조방법은,The mandrel manufacturing method for a grounding resistor of the present invention,

(Ⅰ) 석탄계 코크스 원료를 분쇄하여 20~30㎜의 입도인 대형 석탄계 코크스와, 10~20㎜의 입도인 중형 석탄계 코크스 및 0.002~0.089㎜ 이하의 입도를 가지는 소형 분말 석탄계 코크스로 선별하는 단계;(I) pulverizing coal-based coke raw material to screen the large coal-based coke having a particle size of 20 ~ 30mm, medium coal-based coke having a particle size of 10 ~ 20mm and small powder coal-based coke having a particle size of less than 0.002 ~ 0.089mm;

(Ⅱ) 선별된 대형 석탄계 코크스와 중형 석탄계 코크스 및 소형 분말 석탄계 코크스를 배합하여 건조재료를 만드는 단계;(II) mixing the selected large coal-based coke, medium coal-based coke and small powder coal-based coke to make a dry material;

(Ⅲ) 상기 건조재료에 접착제 및 첨가제를 투입하여 180~200℃에서 15분간 반죽하는 단계;(III) a step of kneading for 15 minutes at 180 ~ 200 ℃ by adding an adhesive and an additive to the dry material;

(Ⅳ) 반죽한 건조재료를 진공상태에서 압력을 가해 압출 성형하는 단계; 및(IV) extrusion molding the kneaded dry material under vacuum; And

(Ⅴ) 압출 성형한 건조재료를 로스팅 하는 단계;를 포함하되,상기 첨가제는 스테아린산, Fe2O3철분 및 그린 스크랩으로 구성되는 것을 특징으로 한다.(V) a step of roasting the dry material extruded; including, wherein the additive is characterized in that consisting of stearic acid, Fe 2 O 3 iron powder and green scrap.

또한, 상기 건조재료는 중량 백분율 기준으로 상기 대형 석탄계 코크스 35~40중량%, 중형 석탄계 코크스 15~20중량% 및 소형 분말 석탄계 코크스 35~40중량%가 포함되는 것이 바람직하다.In addition, the dry material is preferably contained 35 to 40% by weight of the large coal-based coke, 15 to 20% by weight of medium coal-based coke and 35 to 40% by weight of small powder coal-based coke.

그리고, 총 중량 중 상기 건조재료가 차지하는 비중은 60~68.7%, 상기 접착 제는 25~30%, 상기 스테아린산은 0.5~0.8%, Fe2O3철분은 0.1~0.5%를 점하는 것이 바람직하다.In addition, the specific gravity of the dry material in the total weight is 60 to 68.7%, the adhesive is 25 to 30%, the stearic acid is 0.5 to 0.8%, Fe 2 O 3 It is preferable to point 0.1 to 0.5%. .

한편, 상기 (Ⅳ)단계는, 상기 반죽한 건재재료를 15~22㎜Hg이하의 진공상태에서 1000~1300톤의 압력을 5~10초간 가압하여 55~60㎜/min의 압출 속도로 체적밀도를 1~1.74g/㎤를 가지도록 압출 성형하는 것이 바람직하다.On the other hand, in the (IV) step, the kneaded building material is pressed under a pressure of 1000 to 1300 tons for 5 to 10 seconds in a vacuum state of 15 to 22 mmHg or less, and a bulk density at an extrusion speed of 55 to 60 mm / min. It is preferable to extrudate to have 1 to 1.74 g / cm 3.

또한, 상기 (Ⅴ)단계는, 압출 성형한 건조재료를 800~900℃의 온도까지 로스팅을 진행하고, 이후 200~300℃까지 자연냉각하는 것이 바람직하다.을 특징으로 하는 접지 저항체용 심봉 제조방법.In the step (V), the extrusion-dried dry material is roasted to a temperature of 800 to 900 ° C, and then naturally cooled to 200 to 300 ° C. .

그리고, 상기 (Ⅴ)단계 후, 로스팅이 완료된 건조재료에 그리트 블라스트(grit blast)를 실시하고, 블라스트 처리된 건조재료를 10~15bar에서 고압 함침 처리 후에 다시 한번 로스팅을 실시하는 것이 바람직하다.Then, after the (V) step, it is preferable to perform a grit blast (grit blast) to the dried material, the roasting is complete, and to perform the roasting once again after the high pressure impregnation treatment at 10 ~ 15bar.

한편, 상기 (Ⅴ)단계 후, 로스팅이 완료된 건조재료를 흑연화 처리하는 (Ⅵ)단계와, 흑연화 처리된 건조재료를 가공하는 (Ⅶ)단계를 더 포함하는 것이 바람직하다.On the other hand, after the above (V), it is preferable to further include the step (VI) of graphitizing the dried material, the roasting is completed, and the (iv) step of processing the graphitized dry material.

본 발명에 따른 흑연 접지 저항체 및 흑연 접지 저항체용 심봉 제조방법에 따르면, 심봉을 카본으로 형성하여 수분을 흡수, 유지함으로써 외부 환경변화에도 일정한 저항을 유지하는 효과가 있다.According to the method for manufacturing the graphite grounding resistor and the graphite grounding resistor according to the present invention, the core rod is formed of carbon to absorb and maintain moisture, thereby maintaining a constant resistance to external environmental changes.

또한, 강도가 향상됨과 동시에 부식을 방지하는 부가적인 효과가 있다.In addition, there is an additional effect of improving the strength and preventing corrosion.

이하, 본 발명의 바람직한 실시 예를 첨부된 도면을 참조하여 상세하게 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 흑연 접지 저항체를 도시한 사시도이고, 도 2는 본 발명에 따른 접지전극용 심봉의 제조방법을 설명하기 위한 흐름도이다.1 is a perspective view illustrating a graphite grounding resistor according to the present invention, and FIG. 2 is a flowchart illustrating a method of manufacturing a core rod for a ground electrode according to the present invention.

도 1에 도시한 바와 같이, 흑연 접지 저항체(10)는 둘레 방향으로 3개의 골이 형성된 원기둥 형태의 흑연계 저저항체(20)의 중앙에 심봉(30)이 박혀 있는 형상을 가진다. 여기서, 상기 심봉(30)은 그 일단이 피뢰도선(미도시)에 의해 돌침부(미도시)와 전기적으로 연결되며 고 전도체로 이루어지는 것이 바람직하다. As illustrated in FIG. 1, the graphite ground resistor 10 has a shape in which a core rod 30 is embedded in the center of a cylindrical graphite low resistor 20 having three valleys formed in a circumferential direction. Here, the mandrel 30 is one end thereof is electrically connected to the protrusion (not shown) by a lightning rod (not shown) and preferably made of a high conductor.

또한, 상기 흑연 접지 저항체(10)에 대한 상세한 내용은 본 발명의 출원인의 등록특허번호 제0610604호 "흑연 저저항 접지 모듈과 그 제조방법" 및 등록특허번호 제0875504호 "퍼라이트 흑연 접지 모듈"에 상세히 개시되어 있으므로 상세한 설명은 생략한다.In addition, the details of the graphite grounding resistor 10 are described in the Applicant's Patent No. 0610604 "Graphite Low Resistance Ground Module and Its Manufacturing Method" and Patent No. 0875504 "Perlite Graphite Ground Module". Since it is disclosed in detail, a detailed description thereof will be omitted.

또한, 상기 심봉(30)은 20~30㎜의 입도인 대형 석탄계 코크스와, 10~20㎜의 입도인 중형 석탄계 코크스 및 0.002~0.089㎜(170mesh 정도) 이하의 입도를 가지는 소형 분말 석탄계 코크스로 구성되는 건조재료와, 상기 건조재료에 투입되는 접착제 및 상기 건조재료에 첨가되는 첨가제를 포함한다.In addition, the core rod 30 is composed of large coal-based coke having a particle size of 20 to 30mm, medium coal-based coke having a particle size of 10 to 20mm, and small powder coal-based coke having a particle size of 0.002 to 0.089 mm (about 170 mesh) or less. And a dry material to be added, an adhesive added to the dry material, and an additive added to the dry material.

상기 접착제는 피치접착제(pitch binder)로 구성되는 것이 바람직하다.The adhesive is preferably composed of a pitch binder.

또한, 상기 첨가제는 스테아린산(Stearic Acid), Fe2O3철분(산화철)을 포함한다.In addition, the additive includes stearic acid (Stearic Acid), Fe 2 O 3 iron (iron oxide).

그리고, 상기 건조재료는 중량 백분율 기준으로 상기 대형 석탄계 코크스 35~40중량%, 중형 석탄계 코크스 15~20중량% 및 소형 분말 석탄계 코크스 35~40중량%가 포함된다.The dry material may include 35-40 wt% of the large coal-based coke, 15-20 wt% of the medium coal-based coke, and 35-40 wt% of the small powder coal-based coke.

한편, 총 중량 중 상기 건조재료가 차지하는 비중은 60~68.7%, 상기 접착제는 25~30%, 상기 스테아린산은 0.5~0.8%, Fe2O3철분은 0.1~0.5%를 점하는 것이 바람직하다.Meanwhile, the specific gravity of the dry material in the total weight is 60 to 68.7%, the adhesive is 25 to 30%, the stearic acid is 0.5 to 0.8%, Fe 2 O 3 It is preferable that the iron content is 0.1 to 0.5%.

이와 같이 구성되는 건조재료, 접착제 및 첨가제는 후술할 분쇄와 선별, 배합, 반죽, 성형, 로스팅, 함침, 흑연화 및 완제품 가공 등을 거쳐 접지전극용 카본 심봉을 완성하게 되며 상세한 설명은 후술한다.The dry materials, adhesives, and additives configured as described above complete the carbon core rods for the ground electrode through grinding and sorting, blending, kneading, molding, roasting, impregnation, graphitization, and finished product processing, which will be described later.

이하, 본 발명에 따른 접지전극용 심봉의 제조방법을 도 2를 참고하여 설명한다.Hereinafter, a method of manufacturing a ground electrode mandrel according to the present invention will be described with reference to FIG. 2.

먼저, 석탄계 코크스 원료를 분쇄하여 20~30㎜의 입도인 대형 석탄계 코크스와, 10~20㎜의 입도인 중형 석탄계 코크스 및 0.002~0.089㎜ 이하의 입도를 가지는 소형 분말 석탄계 코크스로 선별한다(S110).First, the coal-based coke raw material is pulverized and selected into large coal-based coke having a particle size of 20 to 30 mm, medium coal-based coke having a particle size of 10 to 20 mm, and small powder coal-based coke having a particle size of 0.002 to 0.089 mm or less (S110). .

다음, 선별된 대형 석탄계 코크스와 중형 석탄계 코크스 및 소형 분말 석탄계 코크스를 배합하여 원료배합시스템에 넣어 건조재료를 만든다(S120).Next, the selected large coal-based coke and medium coal-based coke and small powder coal-based coke is blended into a raw material mixing system to make a dry material (S120).

이때, 상기 건조재료는 중량 백분율 기준으로 상기 대형 석탄계 코크스 35~40중량%, 중형 석탄계 코크스 15~20중량% 및 소형 분말 석탄계 코크스 35~40중량%가 포함된다.At this time, the dry material includes 35 to 40% by weight of the large coal-based coke, 15 to 20% by weight of medium coal-based coke and 35 to 40% by weight of small powder coal-based coke.

그리고, 상기 건조재료를 180~200℃로 선 가열하여 반죽 기계에 넣은 후에 접착제 및 첨가제를 투입하여 180~200℃에서 15분간 반죽한다(S130).Then, the drying material is preheated to 180 ~ 200 ℃ put into the kneading machine and then kneading for 15 minutes at 180 ~ 200 ℃ by adding an adhesive and an additive (S130).

이때, 상기 접착제는 피치접착제(pitch binder)로 구성되며, 상기 첨가제는 스테아린산(Stearic Acid), Fe2O3철분(산화철) 및 그린 스크랩(green scrap)을 포함한다.At this time, the adhesive is composed of a pitch binder (pitch binder), the additive includes stearic acid (Stearic Acid), Fe 2 O 3 iron (iron oxide) and green scrap (green scrap).

그리고, 총 중량 중 상기 건조재료가 차지하는 비중은 60~68.7%, 상기 접착제는 25~30%, 상기 스테아린산은 0.5~0.8%, Fe2O3철분은 0.1~0.5%를 점하도록 첨가한다.In addition, the specific gravity of the dry material in the total weight is 60 to 68.7%, the adhesive is 25 to 30%, the stearic acid is 0.5 to 0.8%, Fe 2 O 3 Iron content is added so as to point to 0.1 to 0.5%.

다음, 반죽한 건조재료에 물을 뿌려 130~140℃로 냉각시키고, 냉각된 건조재료를 압출성형기에 투입하여 진공상태에서 압력을 가해 압출 성형한다(S140).Next, water is sprayed on the kneaded dry material and cooled to 130 to 140 ° C., and the cooled dry material is put into an extruder and extruded by applying pressure in a vacuum state (S140).

이때, 압출성형기는 상기 반죽한 건재재료를 15~22㎜Hg이하의 진공상태에서 1000~1300톤의 압력을 5~10초간 가압하여 55~60㎜/min의 압출 속도로 압출 성형한다. 또한, 압출 성형된 건조재료는 체적밀도가 1~1.74g/㎤를 가진다. 이후, 접지전극용 심봉에 부합하는 길이로 절단한다.At this time, the extruder is extruded at a extrusion speed of 55 ~ 60 mm / min by pressing the pressure of 1000 ~ 1300 tons for 5-10 seconds in a vacuum of 15 ~ 22 mmHg or less kneaded building material. Further, the extruded dry material has a volume density of 1 to 1.74 g / cm 3. Then, the length is cut to match the mandrel for the ground electrode.

그리고, 절단된 건조재료를 로스팅(roasting) 한다(S150). Then, the cut dry material is roasted (S150).

이때, 절단된 건조재료는 오븐에 넣어 구운 후에 상기 건조재료를 로스팅 화 로에서 800~900℃의 온도까지 로스팅(열처리)을 진행하고, 이후 200~300℃까지 자연냉각한다.At this time, the cut dry material is put in an oven and baked after roasting the dried material to a temperature of 800 ~ 900 ℃ in a roasting furnace, and then naturally cooled to 200 ~ 300 ℃.

다음, 로스팅이 완료된 건조재료를 함침한다(S160).Next, the drying material is impregnated with the roasting (S160).

즉, 로스팅이 완료된 건조재료를 숏 블라스팅 머신(shot blasting machine)에 투입하여 그리트 블라스트(grit blast)를 실시하고, 블라스트 처리된 건조재료를 10~15bar에서 고압 함침 처리 후에 다시 한번 로스팅을 실시한다.That is, the roasted dry material is put into a shot blasting machine to perform a grit blast, and the blasted dry material is roasted once again after a high pressure impregnation treatment at 10 to 15 bar.

그리고, 2차 로스팅이 완료된 건조재료를 흑연화 처리한다(S170).In addition, the drying material of the second roasting is graphitized (S170).

즉, 2차 로스팅이 완료된 건조재료를 흑연화 화로에 넣고 보온재료를 덮은 후에 설정된 송전곡선에 따라 송전 흑연화 처리를 실시한다. 이때, 흑연화 처리온도는 3000℃에 달한다.That is, the drying material after the secondary roasting is put in the graphitization furnace, and the heat transfer graphitization treatment is performed according to the set transmission curve after covering the insulating material. At this time, the graphitization treatment temperature reaches 3000 ° C.

다음, 흑연화 처리된 건조재료를 규격에 맞게 가공을 실시하여 접지전극용 카본 심봉을 완성한다(S180).Next, the graphitized dry material is processed to meet the specifications to complete the carbon core rod for the ground electrode (S180).

상기 완성된 흑연 접지 저항체용 카본 심봉을 이용하여 본 발명의 출원인의 등록특허번호 제0610604호 "흑연 저저항 접지 모듈과 그 제조방법" 및 등록특허번호 제0875504호 "퍼라이트 흑연 접지 모듈" 등과 같은 압축성형방법에 의해 상기 심봉을 삽입 후 흑연계 저저항체를 성형한다. 여기서 흑연계 저저항체 성형과정은 공지기술이므로 상세한 설명은 생략한다.By using the completed carbon core rod for graphite ground resistors, such as patent applicant No. 0610604 "graphite low resistance grounding module and its manufacturing method" and Patent No. 0875504 "perlite graphite grounding module" of the present invention After inserting the core rod by the molding method, a graphite-based low resistance body is molded. Since the graphite-based low-resistance molding process is a well-known technique, detailed description thereof will be omitted.

이상, 본 발명의 바람직한 실시 예에 대하여 상세히 설명하였으나, 본 발명의 기술적 범위는 전술한 실시 예에 한정되지 않고 특허청구범위에 의하여 해석되 어야 할 것이다. 이때, 이 기술분야에서 통상의 지식을 습득한 자라면, 본 발명의 범위에서 벗어나지 않으면서도 많은 수정과 변형이 가능함을 고려해야 할 것이다.As mentioned above, although the preferred embodiment of the present invention has been described in detail, the technical scope of the present invention is not limited to the above-described embodiment and should be interpreted by the claims. At this time, those of ordinary skill in the art should consider that many modifications and variations are possible without departing from the scope of the present invention.

도 1은 본 발명에 따른 흑연 접지 저항체를 도시한 사시도이다.1 is a perspective view showing a graphite grounding resistor according to the present invention.

도 2는 본 발명에 따른 접지전극용 심봉의 제조방법을 설명하기 위한 흐름도이다.2 is a flowchart illustrating a method of manufacturing a core rod for a ground electrode according to the present invention.

Claims (11)

흑연계 저저항체; 및Graphite low resistance body; And 상기 흑연계 저저항체의 중앙에 설치되는 흑연계 심봉;A graphite core rod installed at the center of the graphite low resistance body; 을 포함하되,≪ / RTI > 상기 심봉은,The mandrel, 20~30㎜의 입도인 대형 석탄계 코크스와, 10~20㎜의 입도인 중형 석탄계 코크스 및 0.002~0.089㎜ 이하의 입도를 가지는 소형 분말 석탄계 코크스로 구성되는 건조재료;A dry material composed of large coal coke having a particle size of 20 to 30 mm, medium coal coke having a particle size of 10 to 20 mm, and small powder coal coke having a particle size of 0.002 to 0.089 mm or less; 상기 건조재료와 함께 투입되는 접착제; 및An adhesive added with the dry material; And 상기 건조재료에 첨가되는 첨가제;를 포함하되,Including; additives added to the dry material; 상기 첨가제는 스테아린산, Fe2O3철분 및 그린 스크랩을 포함하는 것을 특징으로 하는 흑연 접지 저항체.The additive is graphite ground resistor, characterized in that it comprises stearic acid, Fe 2 O 3 iron and green scrap. 삭제delete 제 1항에 있어서,The method of claim 1, 상기 건조재료는 중량 백분율 기준으로 상기 대형 석탄계 코크스 35~40중량%와, 중형 석탄계 코크스 15~20중량%와, 소형 분말 석탄계 코크스 35~40중량%가 포함되는 것을 특징으로 하는 흑연 접지 저항체.The dry material is a graphite grounding resistor, characterized in that 35 to 40% by weight of the large coal-based coke, 15 to 20% by weight of medium coal-based coke, and 35 to 40% by weight of small powder coal-based coke. 제 3항에 있어서,The method of claim 3, wherein 총 중량 중 상기 건조재료가 차지하는 비중은 60~68.7%, 상기 접착제는 25~30%, 상기 스테아린산은 0.5~0.8%, Fe2O3철분은 0.1~0.5%를 점하는 것을 특징으로 하는 흑연 접지 저항체.Graphite grounding, characterized in that the specific gravity of the dry material in the total weight is 60 to 68.7%, the adhesive is 25 to 30%, the stearic acid is 0.5 to 0.8%, Fe 2 O 3 iron 0.1 to 0.5% Resistor. (Ⅰ) 석탄계 코크스 원료를 분쇄하여 20~30㎜의 입도인 대형 석탄계 코크스와, 10~20㎜의 입도인 중형 석탄계 코크스 및 0.002~0.089㎜ 이하의 입도를 가지는 소형 분말 석탄계 코크스로 선별하는 단계;(I) pulverizing coal-based coke raw material to screen the large coal-based coke having a particle size of 20 ~ 30mm, medium coal-based coke having a particle size of 10 ~ 20mm and small powder coal-based coke having a particle size of less than 0.002 ~ 0.089mm; (Ⅱ) 선별된 대형 석탄계 코크스와 중형 석탄계 코크스 및 소형 분말 석탄계 코크스를 배합하여 건조재료를 만드는 단계;(II) mixing the selected large coal-based coke, medium coal-based coke and small powder coal-based coke to make a dry material; (Ⅲ) 상기 건조재료에 접착제 및 첨가제를 투입하여 180~200℃에서 15분간 반죽하는 단계;(III) a step of kneading for 15 minutes at 180 ~ 200 ℃ by adding an adhesive and an additive to the dry material; (Ⅳ) 반죽한 건조재료를 진공상태에서 압력을 가해 압출 성형하는 단계; 및(IV) extrusion molding the kneaded dry material under vacuum; And (Ⅴ) 압출 성형한 건조재료를 로스팅 하는 단계;(Ⅴ) roasting the extruded dry material; 를 포함하되,Including, 상기 첨가제는 스테아린산, Fe2O3철분 및 그린 스크랩으로 구성되는 것을 특징으로 하는 접지 저항체용 심봉 제조방법.The additive is a steric acid, Fe 2 O 3 Iron and green scraps manufacturing method, characterized in that consisting of green scrap. 제 5항에 있어서,The method of claim 5, 상기 건조재료는 중량 백분율 기준으로 상기 대형 석탄계 코크스 35~40중량%, 중형 석탄계 코크스 15~20중량% 및 소형 분말 석탄계 코크스 35~40중량%가 포함되는 것을 특징으로 하는 접지 저항체용 심봉 제조방법.The drying material is a core rod manufacturing method for a ground resistor, characterized in that 35 to 40% by weight of the large coal-based coke, 15 to 20% by weight of medium coal-based coke and 35 to 40% by weight of small powder coal-based coke. 제 6항에 있어서,The method of claim 6, 총 중량 중 상기 건조재료가 차지하는 비중은 60~68.7%, 상기 접착제는 25~30%, 상기 스테아린산은 0.5~0.8%, Fe2O3철분은 0.1~0.5%를 점하는 것을 특징으로 하는 접지 저항체용 심봉 제조방법.The specific gravity of the dry material in the total weight is 60 to 68.7%, the adhesive is 25 to 30%, the stearic acid is 0.5 to 0.8%, Fe 2 O 3 iron is characterized in that the grounding resistor characterized in that occupies 0.1 to 0.5% Dragon mandrel manufacturing method. 제 5항 내지 제 7항 중 어느 한 항에 있어서,The method according to any one of claims 5 to 7, 상기 (Ⅳ)단계는,In step (IV), 상기 반죽한 건재재료를 15~22㎜Hg이하의 진공상태에서 1000~1300톤의 압력을 5~10초간 가압하여 55~60㎜/min의 압출 속도로 체적밀도를 1~1.74g/㎤를 가지도록 압출 성형하는 것을 특징으로 하는 접지 저항체용 심봉 제조방법.The kneaded building material was pressurized at a pressure of 1000 to 1300 tons for 5 to 10 seconds in a vacuum state of 15 to 22 mm Hg or less, and had a volume density of 1 to 1.74 g / cm 3 at an extrusion speed of 55 to 60 mm / min. Method for manufacturing a core rod for grounding resistor, characterized in that the extrusion molding to. 제 5항 내지 제 7항 중 어느 한 항에 있어서,The method according to any one of claims 5 to 7, 상기 (Ⅴ)단계는,In step (V), 압출 성형한 건조재료를 800~900℃의 온도까지 로스팅을 진행하고, 이후 200~300℃까지 자연냉각하는 것을 특징으로 하는 접지 저항체용 심봉 제조방법.Roasting the extrusion-molded dry material to a temperature of 800 ~ 900 ℃, and then naturally cooled to 200 ~ 300 ℃ the core rod manufacturing method for a ground resistor. 제 9항에 있어서,The method of claim 9, 상기 (Ⅴ)단계 후,After the above (V) step, 로스팅이 완료된 건조재료에 그리트 블라스트(grit blast)를 실시하고, 블라스트 처리된 건조재료를 10~15bar에서 고압 함침 처리 후에 다시 한번 로스팅을 실시하는 것을 특징으로 하는 접지 저항체용 심봉 제조방법.The grit blast (grit blast) to the dried material is finished roasting, the blasted dry material is a rod for manufacturing a ground resistance body, characterized in that the roasting once again after the high-pressure impregnation treatment at 10 ~ 15bar. 제 5항 내지 제 7항 중 어느 한 항에 있어서,The method according to any one of claims 5 to 7, 상기 (Ⅴ)단계 후,After the above (V) step, 로스팅이 완료된 건조재료를 흑연화 처리하는 (Ⅵ)단계와, 흑연화 처리된 건조재료를 가공하는 (Ⅶ)단계를 더 포함하는 것을 특징으로 하는 접지 저항체용 심봉 제조방법.And (VI) graphitizing the dried material having been roasted, and (iii) processing the dry material that has been graphitized.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102074807A (en) * 2010-12-20 2011-05-25 西安优耐达电力技术有限公司 Composite grounding unit
KR101332666B1 (en) 2013-03-22 2013-11-25 한국산업은행 Ground module and methode of fabricating the same
CN106148722A (en) * 2016-08-18 2016-11-23 陕西斯瑞新材料股份有限公司 The molten drop of vacuum consumable electrode arc furnace controls device

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KR100610604B1 (en) 2005-02-04 2006-08-09 (주)의제전기설비연구원 A carbon low-resistance grounding module and the method of the same
KR100907699B1 (en) 2008-09-23 2009-07-14 박종수 Ground plate
KR100930120B1 (en) 2009-08-25 2009-12-07 노현용 Composition for earth resistance lowering agent

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KR100610604B1 (en) 2005-02-04 2006-08-09 (주)의제전기설비연구원 A carbon low-resistance grounding module and the method of the same
KR100907699B1 (en) 2008-09-23 2009-07-14 박종수 Ground plate
KR100930120B1 (en) 2009-08-25 2009-12-07 노현용 Composition for earth resistance lowering agent

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102074807A (en) * 2010-12-20 2011-05-25 西安优耐达电力技术有限公司 Composite grounding unit
KR101332666B1 (en) 2013-03-22 2013-11-25 한국산업은행 Ground module and methode of fabricating the same
CN106148722A (en) * 2016-08-18 2016-11-23 陕西斯瑞新材料股份有限公司 The molten drop of vacuum consumable electrode arc furnace controls device

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