KR20070024193A - A lime element clearing method of revival aggregate make use of liquefaction carbonic acid gas and that equipment and produced revival aggregate - Google Patents

A lime element clearing method of revival aggregate make use of liquefaction carbonic acid gas and that equipment and produced revival aggregate Download PDF

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KR20070024193A
KR20070024193A KR1020050078876A KR20050078876A KR20070024193A KR 20070024193 A KR20070024193 A KR 20070024193A KR 1020050078876 A KR1020050078876 A KR 1020050078876A KR 20050078876 A KR20050078876 A KR 20050078876A KR 20070024193 A KR20070024193 A KR 20070024193A
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aggregate
carbon dioxide
liquefied carbon
pressure tank
circulating aggregate
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KR1020050078876A
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Korean (ko)
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KR100714771B1 (en
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임명순
임대빈
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주식회사 그린환경
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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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/023—Chemical treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/06—Selection or use of additives to aid disintegrating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

A method for removing lime substance of recycled aggregate using liquefied CO2 gas, an apparatus thereof, and recycled aggregate manufactured thereby are provided to allow recycling of aggregate without lime substance, to expand the use range of recycled aggregate, to solve the problems related to shortage of landfill, to eliminate pollution sources, and to increase the deficient aggregate resource nationwide. The method for removing lime substance of recycled aggregate using liquefied CO2 gas includes: mixing the recycled aggregate with water and supplying them to a pressure tank; supplying liquefied CO2 gas to the pressure tank; stirring the pressure tank to allow a neutralizing reaction of the lime substance and the liquefied CO2 gas; and repeating the above agitating and washing with water to obtain recycled aggregate without lime substance.

Description

액화 탄산가스를 이용한 순환골재의 석회성분 제거 방법과 장치 및 그에 의해 생산된 순환골재{A lime element clearing method of revival aggregate make use of liquefaction carbonic acid gas and that equipment and produced revival aggregate}A lime element clearing method of revival aggregate make use of liquefaction carbonic acid gas and that equipment and produced revival aggregate}

도 1 은 본 발명의 바람직한 실시예를 나타낸 블럭도1 is a block diagram showing a preferred embodiment of the present invention

도 2 는 본 발명의 바람직한 실시예를 나타낸 장치도2 is a device diagram showing a preferred embodiment of the present invention

[도면의 주요 부분에 대한 부호의 설명][Description of Symbols for Main Parts of Drawing]

10 : 액화 탄산가스 탱크 11 : 액화 탄산가스 공급관10: liquefied carbon dioxide tank 11: liquefied carbon dioxide gas supply pipe

12 : 밸브 20 : 압력탱크12: valve 20: pressure tank

21 : 모터 22 : 체인21: motor 22: chain

23 : 회전축 24 : 교반축23: rotating shaft 24: stirring shaft

25 : 교반날개 26 : 받침대25: stirring blade 26: pedestal

27 : 투입구 28 : 개방도어27: inlet 28: open door

29 : 고정대 30 : 배수밸브29: holder 30: drain valve

본 발명은 액화 탄산가스를 고압으로 공급하여 순환골재의 석회성분을 제거하는데 사용할 수 있도록 하는 것으로,The present invention is to supply a liquefied carbon dioxide gas at a high pressure to be used to remove the lime component of the circulating aggregate,

더욱 상세하게는 순환골재(습식생산방식, 건식생산방식)의 석회성분을 제거하기 위하여 압력탱크에 순환골재를 넣고, 압력탱크에 액화 탄산가스를 고압으로 주입시켜 순환골재의 석회성분과 액화 탄산가스와의 중화반응으로 순환골재에 붙어 있는 석회성분을 물에 녹지 않는 탄산석회로 분리하여 석회성분이 없는 순환골재를 생산하는 방법과 장치 및 그에 의해 생산된 순환골재에 관한 것이다.More specifically, in order to remove the lime component of the circulating aggregate (wet production method, dry production method), the circulating aggregate is put in a pressure tank, and the liquefied carbon dioxide is injected at a high pressure into the pressure tank so that the lime component and the liquefied carbon dioxide of the circulating aggregate are injected. The present invention relates to a method and apparatus for producing a circulating aggregate free of lime by separating the lime component attached to the circulating aggregate into carbonate carbonate insoluble in water, and to a circulating aggregate produced by the same.

일반적으로 순화골재는 재생골재라고도 불리며 건축폐기물이나 폐 콘크리트를 파쇄하여 바람으로 선별하는 건식생산방식이나, 물로 선별하는 습식생산방식으로 재사용할 수 있도록 제조된 골재를 말한다.Generally, purified aggregate is also called recycled aggregate and refers to aggregate manufactured to be reused by dry production method of crushing construction waste or waste concrete by wind or wet production method of sorting by water.

순환골재의 주성분은 모래 및 자갈인 골재와 시멘트의 수화반응으로 생성된 수산화석회이다.  The main component of circulating aggregate is lime hydroxide produced by the hydration reaction of aggregate and cement which are sand and gravel.

이 중에 수산화석회가 있으므로 우량골재의 조건인 비중, 흡수율 등이 만족하지 못하기 때문에 순환골재의 용도에 제약이 많아 콘크리트 구조용 골재로 사용하지 못하고 주로 성토용 골재 등 저가의 원료로 사용되고 있다.Among them, lime hydroxide does not satisfy the specific gravity, absorption rate, etc., which are the conditions of fine aggregates, so there are many restrictions on the use of circulating aggregates. Therefore, it is not used as aggregate for concrete structures, and is mainly used as low-cost raw materials such as fill aggregates.

순환골재에 부착된 수산화석회를 효과적으로 제거하기만 한다면 천연골재나 부순 골재의 유사한 용도인 콘크리트에 사용 가능한 구조용 골재로 사용할 수 있게 되어, 순환골재의 이용범위가 크게 확대될 것이고, 매립 등으로 매립지 부족난 해소, 환경오염원의 원천적 제거가 가능하며, 궁극적으로 국내 부족한 골재자원의 확대효과와 부가가치 창출효과가 기대된다.As long as it effectively removes the lime hydroxide attached to the recycled aggregates, it can be used as structural aggregates that can be used for concrete, which is a similar use of natural aggregates or crushed aggregates, and the scope of use of recycled aggregates will be greatly expanded. It is possible to solve the problem and to remove the source of environmental pollution, and ultimately, it is expected to expand the aggregate resources that are scarce in Korea and to create added value.

그동안 국내, 외에서 개발 및 시행되고 있는 기술들을 살펴보면, 국내에서는 파쇄 후 바람을 이용한 입도 분리를 하는 건식생산방식과, 물을 이용한 입도 분리를 하는 습식생산방식으로 순환골재를 생산하고 있으나, 이러한 기술은 대량생산은 가능하다는 장점이 있으나 골재에 부착된 수산화석회 제거가 효과적으로 이루어지지 않아 콘크리트용 구조물용도 골재로서 이용이 곤란한 문제점이 있었다.Looking at the technologies that have been developed and implemented in Korea and abroad in the meantime, in Korea, circulating aggregate is produced by the dry production method that separates the particle size using wind after crushing and the wet production method that separates the particle size using water. Although mass production is possible, there is a problem that it is difficult to use as aggregate for concrete structures because lime hydroxide attached to the aggregate is not effectively removed.

국외에서는 폐 콘크리트에 300℃의 열을 가한 후 골재에 물리적인 충격을 가하여 골재를 생산하는 방법, 밀봉된 수조에 골재를 채운 후 진공, 감압을 통하여 재생골재 내부로 수분을 완전히 침투시킨 후 콘크리트용 골재로 사용하는 방법, 회전식 드럼에 골재를 투입하여 드럼을 회전시켜 골재 표면에 부착된 몰타르를 제거하는 방법, 파쇄된 골재를 수조에 침전시키고 하부에 공기방울을 대량으로 불어 넣어 몰타르와 골재의 밀도 차이를 이용하여 분리하는 방법 등 다양한 방법이 개발 및 시도되고 있다. Overseas The method of producing aggregate by applying physical impact to aggregate after applying 300 ℃ heat to waste concrete, filling the aggregate in sealed water tank and completely infiltrating moisture into recycled aggregate through vacuum and decompression Method of use as aggregate, method of inserting aggregate into rotary drum to rotate drum to remove mortar adhering to aggregate surface, settling the crushed aggregate into water tank and blowing air bubbles in the lower part, density of mortar and aggregate Various methods have been developed and tried, such as a method of separating using a difference.

또한, 액화 탄산가스는 드라이아이스 제조, 청량음료의 탄산가스 주입용, 용접 시 온도상승 억제용, 온실 및 하우스에서 탄산가스 비료용, 화재에 불을 끄기 위한 소화용, 고압이 필요한 곳에 사용하는 용도, 동물의 도살용 등으로 사용되고 있으나, 순환골재의 재활용에 사용된 적은 없었다.In addition, liquefied carbonic acid gas is used for manufacturing dry ice, injecting carbonated gas into soft drinks, suppressing temperature rise during welding, carbonic acid fertilizer in greenhouses and houses, extinguishing fires, and for use where high pressure is required. It has been used to slaughter animals, but has never been used to recycle recycled aggregates.

본 발명은 이러한 종래의 결점을 해소하기 위하여 안출된 것으로, 습식생산방식 또는 건식생산방식으로 생산되는 순환골재를 얍력탱크에 넣고 액화 탄산가스를 고압으로 주입하여 순환골재에 부착되어 있는 수산화석회와 반응시켜 석회성분이 없는 순환골재를 생산함으로써 양질의 콘크리트용 골재로 사용할 수 있도록 하는 순환골재 생산을 목적으로 한다.The present invention has been made in order to solve the above-mentioned drawbacks, and the circulating aggregate produced by the wet production method or dry production method is put in the output tank and injected with liquefied carbon dioxide at high pressure to react with the lime hydroxide attached to the circulating aggregate. It aims to produce recycled aggregates that can be used as high-quality concrete aggregates by producing recycled aggregates without lime components.

본 발명은 탄산가스는 대기중에 300ppm정도 소량이 존재하며, 탄소를 포함하는 물질이 타거나, 발효할 때, 동물이 호흡할 때에 생성되는 것으로, 1기압에서는 물에 약간 녹는데, 1기압에 물의 부피당 1.79 정도가 녹지만, 압력이 더 높아지게 되면 더 많은 양이 물에 녹게 되어 약산성 용액으로 된다. In the present invention, carbon dioxide gas is present in a small amount of about 300 ppm in the atmosphere, and when carbon-containing materials burn or ferment, the animal is produced when breathing, and it is slightly dissolved in water at 1 atm. About 1.79 per volume melts, but at higher pressures, more is dissolved in water, resulting in a slightly acidic solution.

또한, 탄산가스를 31.1℃에서 1∼73기압의 압력을 가해 압축하거나, -23℃～-12℃에서 15～23기압을 가해 압축하면 탄산가스가 액화된다.In addition, the carbon dioxide gas is compressed by applying a pressure of 1 to 73 atm at 31.1 ° C or by applying a pressure of 15 to 23 atm at -23 ° C to -12 ° C.

이와 같은 탄산가스의 성질을 이용하여 압력을 가해 압축하여 물에 더 많이 탄산가스를 녹게 하여 순환골재에 부착되어 있는 수산화석회와의 반응 시에 반응시간을 빠르게 할 수 있도록 한다.Using the properties of carbonic acid gas such as to pressurize the pressure to melt more carbonic acid gas in water to make the reaction time faster when reacting with the lime hydroxide attached to the circulating aggregate.

본 발명은 건식생산방식으로 생산된 순환골재나, 습식생산방식으로 생산된 순환골재를 물과 혼합하여, 1∼73기압의 압력에 지탱되는 압력탱크(20)에 넣고, 컴프레샤(13)로 액화 탄산가스를 압력탱크(20)에 주입시키므로 수학식 1과 같은 반응을 일어나게 한다.The present invention mixes the circulating aggregate produced by the dry production method or the circulating aggregate produced by the wet production method with water, put into a pressure tank 20 supported by a pressure of 1 to 73 atm, and liquefied with a compressor (13) Since the carbon dioxide is injected into the pressure tank 20, a reaction as in Equation 1 occurs.

Ca(OH)2+CO2 → CaCO3 + H2OCa (OH) 2 + CO 2 → CaCO 3 + H 2 O

위와 같은 반응이 일어나게 되면 순환골재에 붙어 있는 수산화석회가 탄산석회로 변환되면서, 순환골재의 수산화석회가 탈락되고, 탄산석회는 불용성이므로 물에 가라앉게 되어 다시 골재 표면에 부착되지 않는다.When the above reaction occurs, the lime hydroxide adhering to the circulating aggregate is converted into carbonate, and the lime hydroxide of the circulating aggregate is dropped, and the lime carbonate is insoluble, so that it sinks in water and does not adhere to the aggregate surface again.

압력탱크(20) 내에서 반응이 잘 이루어지기 위하여, 압력탱크(20) 내에서 순환골재가 교반이 잘 되도록 교반 시설이 있어야 한다.In order to make the reaction well in the pressure tank 20, there must be a stirring facility so that the circulating aggregate is well stirred in the pressure tank 20.

상기 교반 시설은 압력탱크(20)를 받침대(26)에 의하여 설치하며 회전축(23)이 내부를 관통하도록 하고 일측에서 체인(22)을 모터(21)와 연결하여 회전 가능하도록 하며, 회전축(23)은 고정대(29)를 통하여 지지되도록 한다.The stirring facility installs the pressure tank 20 by the pedestal 26 and allows the rotating shaft 23 to penetrate the inside, and rotates by connecting the chain 22 to the motor 21 at one side, and the rotating shaft 23. ) Is supported through the holder (29).

상기 회전축(23)은 다수의 교반축(24)이 연결되어 있고, 이 교반축(24)에는 교반날개(25)가 설치되어 있어서 순환골재를 골고루 교반할 수 있다.The rotating shaft 23 is connected to a plurality of stirring shafts 24, the stirring shaft 24 is provided with a stirring blade 25 can be stirred evenly circulating aggregate.

상기 압력탱크(20)는 일부분에 투입구(27)를 설치하여 순환골재를 편리하게 공급할 수 있으며, 개방도어(28)를 설치하여 생산된 순환골재를 배출할 수 있다.The pressure tank 20 can be conveniently supplied to the circulating aggregate by installing the inlet 27 in a portion, it is possible to discharge the circulating aggregate produced by installing the open door (28).

압력탱크(20)의 하측에는 배수밸브(30)를 설치하여 재활용수 또는 오니를 회수할 수 있도록 한다.A drain valve 30 is installed below the pressure tank 20 to recover recycled water or sludge.

압력탱크(20)에 순환골재를 물과 혼합(몇 대 몇으로 혼합하는지?)하여 투입된 후 액화 탄산가스 탱크(10)에 저장된 액화 탄산가스는 컴프레샤(13)에 의하여 액화 탄산가스 공급관(11)을 압력탱크(20)에 연결하여 밸브(12)를 개방하면 고압으로 액화 탄산가스가 공급된다.The liquefied carbonic acid gas stored in the liquefied carbon dioxide gas tank 10 after the circulating aggregate is mixed with water (how many are mixed?) Into the pressure tank 20 is introduced into the liquefied carbon dioxide gas supply pipe 11 by the compressor 13. To the pressure tank 20 to open the valve 12 is supplied with liquefied carbon dioxide gas at high pressure.

모터(21)에 전원을 공급하여 체인(22)을 통한 회전축(23)의 회전으로 교반축(24)과 교반날개(25)를 통하여 혼합되면서 액화 탄산가스와 순환골재가 반응하여 순환골재에 붙어있는 석회성분이 제거된다.While supplying power to the motor 21 and mixing through the stirring shaft 24 and the stirring blade 25 by the rotation of the rotary shaft 23 through the chain 22, the liquefied carbon dioxide and the circulating aggregate reacts and adheres to the circulating aggregate The lime components present are removed.

반응이 끝난 후에 개방도어(28)를 열고 압력탱크(20)에서 인출하여 불용성인 탄산석회를 제거하기 위하여 물로 세척하게 되면 석회성분이 없는 순환골재가 된다.After the reaction, the open door 28 is opened and drawn out from the pressure tank 20 and washed with water to remove insoluble lime carbonate, which is a circulating aggregate without lime.

세척한 물은 침전시켜 탄산석회가 슬러지로 남게 되고, 탄산석회 슬러지와 같은 오니와 물은 압력탱크(20) 하측의 배수밸브(30)와 통상적인 필터프레스를 이용하여 회수하며, 회수된 물은 재활용수로 사용될 수 있도록 한다.The washed water is precipitated to leave lime carbonate as sludge. The sludge and water, such as lime carbonate sludge, are recovered using the drain valve 30 under the pressure tank 20 and a conventional filter press. It can be used as recycled water.

상기 순환골재는 50∼100 루베 정도의 압력탱크(20)에 공급되어 작업하는 것이 대량생산에 효과적인 것이며, 20∼30분 정도의 시간을 경과 하면 1회 생산을 종료할 수 있는 것이다.The circulating aggregate is supplied to a pressure tank 20 of about 50 to 100 rubes and is effective for mass production, and once the time of about 20 to 30 minutes has elapsed, the production can be finished once.

본 발명은 순환골재(습식생산방식, 건식생산방식)의 석회성분을 제거하기 위하여 압력탱크에 순환골재를 넣고, 고압 탱크에 액화 탄산가스를 고압으로 주입시켜 순환골재의 석회성분과 액화 탄산가스와의 중화반응으로 순환골재에 붙어 있는 석회성분을 물에 녹지 않는 탄산석회로 분리하여 석회성분이 없는 순환골재를 생산함으로써 재활용할 수 있는 천연 골재 화 또는 순환골재를 생산하여 콘크리트용 골재에 적합한 골재를 생산할 수 있게 되어, 순환골재의 이용범위가 크게 확대 될 것이고, 매립 등으로 매립지 부족난 해소, 환경오염원의 원천적 제거가 가능하며, 궁극적으로 국내 부족한 골재자원의 확대효과와 부가가치 창출효과가 크다.The present invention is to put the circulating aggregate in the pressure tank in order to remove the lime component of the circulating aggregate (wet production method, dry production method), injecting liquefied carbon dioxide gas into the high pressure tank at high pressure and By separating the lime component attached to the circulating aggregate into carbonate carbonate which does not dissolve in water, it produces natural aggregate or recycled aggregate which can be recycled by producing circulating aggregate without lime component. It will be able to produce, the scope of recycling aggregates will be greatly expanded, the landfill shortage can be eliminated, the source of environmental pollution source can be eliminated, and ultimately, the effect of expanding domestic aggregate resources and creating added value is great.

Claims (4)

폐 콘크리트를 투입하여 파쇄하고 선별하여 입도 별로 순환골재를 생산함에 있어서, In the production of circulating aggregate by crushing and sorting waste concrete by particle size, 상기 순환골재를 물과 혼합하여 압력탱크에 공급하는 과정과; Mixing the circulating aggregate with water and supplying it to a pressure tank; 상기 순환골재가 공급된 압력탱크에 액화 탄산가스를 공급하는 과정과; Supplying liquefied carbon dioxide to a pressure tank supplied with the circulating aggregate; 상기 압력탱크 내에서 순환골재에 붙어 있는 석회성분과 액화 탄산가스와의 중화반응이 일어나도록 교반하는 과정과; Stirring to cause a neutralization reaction between the lime component adhering to the circulating aggregate and the liquefied carbon dioxide in the pressure tank; 상기 중화반응이 일어난 순환골재를 세척하는 과정을 반복하여 석회성분이 없는 순환골재를 얻어짐을 특징으로 하는 액화 탄산가스를 이용한 순환골재의 석회성분 제거방법.Method for removing the lime component of the recycled aggregates using liquefied carbon dioxide, characterized in that to obtain a recycled aggregate free of lime components by repeating the process of washing the circulating aggregates in which the neutralization reaction occurred. 폐 콘크리트를 투입하여 파쇄하고 선별하여 입도 별로 순환골재를 생산함에 있어서, In the production of circulating aggregate by crushing and sorting waste concrete by particle size, 상기 순환골재를 압력탱크 내에 공급하는 단계;Supplying the circulating aggregate into a pressure tank; 상기 순환골재가 공급된 압력탱크에 액화 탄산가스 탱크로부터 액화 탄산가스를 공급하는 단계; Supplying liquefied carbon dioxide gas from a liquefied carbon dioxide gas tank to the pressure tank supplied with the circulating aggregate; 상기 압력탱크 내에서 순환골재에 붙어 있는 석회성분과 액화 탄산가스와의 중화반응이 일어나도록 교반하는 단계; Stirring to cause a neutralization reaction between the lime component adhering to the circulating aggregate and the liquefied carbon dioxide in the pressure tank; 상기 중화반응이 일어난 순환골재를 세척하는 과정을 반복하여 석회성분이 없는 순환골재를 얻어짐을 특징으로 하는 액화 탄산가스를 이용한 순환골재의 석회성분 제거방법으로 생산된 순환골재.Circulating aggregate produced by the method of removing the lime component of the circulating aggregate using liquefied carbon dioxide, characterized in that to obtain a circulating aggregate without the lime component by repeating the process of washing the circulating aggregate in which the neutralization reaction occurred. 고정대(29)에 지지된 회전축(23)에 다수의 교반축(24)을 연결하여 교반날개(25)를 설치한 압력탱크(20)와;A pressure tank 20 in which a plurality of stirring shafts 24 are connected to the rotating shafts 23 supported by the fixing stand 29, and the stirring blades 25 are installed; 일측에서 체인(22)으로 연결된 모터(21)에 의하여 회전되는 회전축(23)과;A rotating shaft 23 rotated by the motor 21 connected to the chain 22 on one side; 상기 압력탱크(20)의 하측에 설치되어 재활용수를 회수하는 배수밸브(30)와;A drain valve 30 installed below the pressure tank 20 to recover recycled water; 상기 압력탱크(20)와 액화 탄산가스 공급관(11)을 통하여 연결된 액화 탄산가스 탱크(10)와;A liquefied carbon dioxide gas tank 10 connected to the pressure tank 20 through a liquefied carbon dioxide gas supply pipe 11; 상기 공급관(11)과 액화 탄산가스 탱크(10) 사이에 설치되어 액화 탄산가스를 압력탱크에 고압으로 공급하는 컴프레샤(13)로 이루어짐을 특징으로 하는 액화 탄산가스를 이용한 순환골재의 제거 장치.Apparatus for removing circulating aggregate using liquefied carbon dioxide, characterized in that the compressor is provided between the supply pipe 11 and the liquefied carbon dioxide tank 10 to supply the liquefied carbon dioxide gas to the pressure tank at high pressure. 제2항에 있어서, 압력탱크는 1∼73기압의 압력하에서 액화 탄산가스가 주입됨을 특징으로 하는 액화 탄산가스를 이용한 석회성분 제거방법으로 생산된 순환골재.The circulating aggregate produced by the lime component removal method using the liquefied carbon dioxide gas according to claim 2, wherein the pressure tank is injected with liquefied carbon dioxide gas under a pressure of 1 to 73 atm.
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