KR100756852B1 - Method for manufacturing of recycling aggregate - Google Patents

Method for manufacturing of recycling aggregate Download PDF

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KR100756852B1
KR100756852B1 KR20060113409A KR20060113409A KR100756852B1 KR 100756852 B1 KR100756852 B1 KR 100756852B1 KR 20060113409 A KR20060113409 A KR 20060113409A KR 20060113409 A KR20060113409 A KR 20060113409A KR 100756852 B1 KR100756852 B1 KR 100756852B1
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South Korea
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aggregate
sorting
crushing
drying
sorter
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KR20060113409A
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Korean (ko)
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김진만
곽은구
이도헌
임대빈
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공주대학교 산학협력단
대한주택공사
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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • 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
    • B02C1/00—Crushing or disintegrating by reciprocating members
    • B02C1/02—Jaw crushers or pulverisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2/00—Crushing or disintegrating by gyratory or cone crushers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/16—Waste materials; Refuse from building or ceramic industry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
    • B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

A recycled aggregate manufacturing method is provided to increase productivity by quickly separating alkaline mortar attached on the surface of aggregate by making the mortar react to acid cleaning water. A recycled aggregate manufacturing method comprises a crushing step for pouring and crushing the construction waste in a crusher(S10); a sorting step for putting the crushed aggregate into a sorter and then sorting out the input aggregate(S20); a floating and separating step for floating and separating foreign materials attached on the aggregate by pouring the sorted aggregate into a floating material sorter(S40); and a drying step for drying the aggregate separated from the foreign material(S50). A grinding step(S30) for pouring the sorted aggregate into a grinder and removing the existing mortar stuck on the surface of the aggregate by physically frictionizing the mortar is added between the sorting step and the floating and separating step.

Description

순환골재 생산방법{Method for manufacturing of recycling aggregate}Method for manufacturing of recycling aggregate

도 1은 본 발명의 실시예에 따른 순환골재 생산방법을 나타내는 흐름도1 is a flow chart showing a circulating aggregate production method according to an embodiment of the present invention

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

S10 파쇄단계 S20 선별단계S10 crushing step S20 sorting step

S30 마쇄단계 S40 부상분리단계S30 Grinding stage S40 Floating separation stage

S50 건조단계S50 drying step

본 발명은 순환골재 생산방법에 관한 것으로, 보다 상세하게는 순환골재의 표면에 잔존해 있는 알칼리성분의 구모르타르를 완전히 탈리하여 고품질의 골재를 생산할 수 있도록 된 순환골재 생산방법에 관한 것이다.The present invention relates to a method for producing circulating aggregate, and more particularly, to a method for producing circulating aggregate, which is capable of producing high quality aggregate by completely desorbing the gumortar of alkali component remaining on the surface of the circulating aggregate.

일반적으로 순환골재는 폐콘트리트 등의 건축폐기물을 파쇄하고 세척하여 다시 사용할 수 있도록 재생시킨 골재를 말한다.Generally, circulating aggregate refers to aggregate recycled to be reused by crushing and washing construction waste such as waste concrete.

이와 같은 순환골재를 생산하는 구체적 방법을 설명하면 먼저 건축폐기물을 파쇄기에 투입하여 적당한 크기로 파쇄하고, 파쇄된 골재를 선별기에 투입하여 필 요한 입도대로 선별한다. 또한, 선별기에서 선별된 골재는 부유물 선별기에 투입하여 골재의 표면에 부착되어 있는 이물질을 부상분리시키고, 이 때 발생한 세척수의 슬러지는 필터프레스에 보내어 압축처리하며, 남은 골재는 반출하여 콘크리트용으로 사용한다.When describing a specific method for producing such recycled aggregates, first, the construction waste is put into a crusher and crushed to a suitable size, and the crushed aggregate is put into a sorter and sorted according to the required granularity. In addition, the aggregates sorted by the sorting machine is put into the float sorting machine to separate and separate the foreign matter adhering to the surface of the aggregate, and the sludge of the washing water generated at this time is sent to the filter press for compression treatment, and the remaining aggregate is taken out and used for concrete. do.

그러나, 상기와 같은 종래의 순환골재를 생산하는 방법으로 생산된 순환골재는 표면에 구모르타르 성분이 잔존해 있어 품질이 떨어지는 문제점이 있다.However, the circulating aggregate produced by the method of producing the conventional circulating aggregate as described above has a problem in that the quality of the Gumortar component remains on the surface.

또한, 생산된 순환골재는 수분을 다량으로 함유하고 있기 때문에 콘크리트용으로는 사용할 수 있지만 미장용 등의 다양한 용도로 사용할 수 없는 문제점이 있다.In addition, the produced recycled aggregate can be used for concrete because it contains a large amount of moisture, but there is a problem that can not be used for various applications such as plastering.

따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로 순환골재의 표면에 부착되어 있는 구모르타르를 완전히 제거하여 고품질의 순환골재를 생산할 수 있는 순환골재의 생산방법을 제공하는 데 목적이 있다.Accordingly, an object of the present invention is to provide a method for producing recycled aggregates which can produce high-quality recycled aggregates by completely removing gumortar attached to the surface of recycled aggregates to solve the above problems. .

또한, 본 발명은 순환골재에 포함되어 있는 수분을 완전히 제거하므로 미장용 등의 다용도로 사용할 수 있는 순환골재를 생산하는 생산방법을 제공하는데 다른 목적이 있다.In addition, the present invention has another object to provide a production method for producing a recycled aggregate that can be used for multi-purpose, such as for plastering because it completely removes the moisture contained in the recycled aggregate.

상기 목적을 달성하기 위하여 본 발명은 건축폐기물을 파쇄기에 투입하여 파쇄하는 파쇄단계와, 상기 파쇄단계에서 파쇄된 골재를 선별기에 투입하여 선별하는 선별단계와, 상기 선별단계에서 선별된 골재를 부유물 선별기에 투입하여 골재에 부착되어 있는 이물질을 부상 분리시키는 부상분리단계와, 상기 부상분리단계에서 이물질이 부상 분리된 골재를 건조시키는 건조단계를 포함하는 순환골재 생산방법에 있어서, 상기 선별단계와 상기 부상분리단계 사이에 상기 선별단계에서 선별된 골재를 마쇄기에 투입하여 골재의 표면에 부착된 구모르타르를 물리적으로 마찰시켜 제거하는 마쇄단계를 더욱 포함하는 순환골재 생산방법을 제공한다.In order to achieve the above object, the present invention is a shredding step of crushing by putting the construction waste in the shredder, a sorting step of sorting by inputting the aggregates crushed in the shredding step, and the aggregates selected in the sorting step suspended matter sorter In the method of producing a circulating aggregate comprising a wound separation step of separating and floating the foreign matter adhering to the aggregate and drying step of drying the aggregate separated from the foreign matter in the wound separation step, the sorting step and the injury It provides a circulating aggregate production method further comprising a grinding step of physically rubbing the old mortar attached to the surface of the aggregate by putting the aggregate selected in the sorting step between the separation step to the grinding machine.

또한, 본 발명은 건조단계에서 폐목재를 연소시켜 발생된 이산화탄소를 이용하여 골재를 건조시키는 것이 바람직하다.In addition, the present invention preferably dry the aggregate using carbon dioxide generated by burning the waste wood in the drying step.

또한, 본 발명은 건조단계에서 폐목재의 연소시 발생된 이산화탄소를 상기 부유물 선별기에 투입하여 상기 세척수를 산성화시키는 것이 바람직하다.In addition, in the present invention, it is preferable to acidify the washing water by injecting carbon dioxide generated during combustion of the waste wood in the drying step to the float sorter.

또한, 본 발명은 상기 부유물 선별기의 세척수는 수소이온농도가 2 내지 5 인 것이 바람직하다.In addition, the present invention, the washing water of the float separator is preferably a hydrogen ion concentration of 2 to 5.

상기와 같은 순환골재 생산방법은 골재의 표면에 부착된 구모르타르를 물리적으로 마찰시켜 제거하므로 골재의 표면에 견고하게 고착되어 있는 구모르타르도 제거할 수 있어 고품질의 제품을 생산할 수 있다. The circulating aggregate production method as described above physically rubs off the mortar adhering to the surface of the aggregate, so that it is possible to remove the mortar firmly fixed to the surface of the aggregate, thereby producing a high-quality product.

또한, 상기와 같은 생산방법은 산성인 세척수를 사용하므로 골재의 표면에 부착되어 있는 알칼리성분인 구모르타르가 산성인 세척수와 반응하여 빠르게 탈리되므로 생산성이 향상된다.In addition, the production method as described above uses acidic washing water, so the productivity of the guartar, which is an alkali component attached to the surface of the aggregate, is rapidly desorbed by reacting with the acidic washing water.

또한, 상기와 같은 순환골재 생산방법은 부유물 선별기에 폐목재의 연소시 발생된 이산화탄소를 투입하여 세척수를 산성화시키므로 자원을 재활용함에 따라 환경을 보호하는 데 도움이 된다.In addition, the recycled aggregate production method as described above helps to protect the environment by recycling the resources to acidify the wash water by inputting the carbon dioxide generated during the combustion of the waste wood in the float sorter.

또한, 상기와 같은 순환골재 생산방법은 배출된 골재를 건조시키므로 콘크리트용 뿐 만아니라 미장용으로도 사용이 가능한 골재를 생산할 수 있다.In addition, the recycled aggregate production method as described above can dry the discharged aggregates can produce aggregates that can be used not only for concrete but also for plastering.

이하, 본 발명에 따른 순환골재 생산방법의 실시예를 첨부도면을 참조하여 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, an embodiment of a circulating aggregate production method according to the present invention.

도 1은 본 발명의 실시예에 따른 순환골재 생산방법을 나타내는 흐름도이다. 1 is a flow chart showing a circulating aggregate production method according to an embodiment of the present invention.

본 발명의 실시예에 따른 순환골재의 생산방법은 건축폐기물을 파쇄기에 투입하여 파쇄하는 파쇄단계(S10)와, 파쇄단계에서 파쇄된 골재를 선별하는 선별단계(S20)와, 선별단계에서 선별된 골재를 마쇄기에 투입하여 골재의 표면에 부착된 구모르타르를 물리적으로 마찰시켜 제거하는 마쇄단계(S30)와, 마쇄단계에서 배출된 골재를 부유물 선별기에 투입하여 골재에 부착되어 있는 이물질을 부상 분리시키는 부상분리단계(S40)와 이물질이 부상분리된 골재를 건조시키는 건조단계(S50)를 포함한다.The production method of circulating aggregate according to an embodiment of the present invention is a crushing step (S10) and the crushing step (S20) for sorting the aggregates crushed in the crushing step by putting the construction waste into the crusher, Injecting aggregate into the grinding machine to physically rub off the mortar adhering to the surface of the aggregate grinding step (S30), and the aggregate discharged from the grinding step into the float sorter to separate the foreign matter attached to the aggregates floating Floating separation step (S40) and a foreign matter includes a drying step (S50) for drying the separated separated aggregate.

파쇄단계(S10)는 폐콘크리트 등의 건축폐기물을 파쇄기에 투입하여 파쇄하는 단계로서, 파쇄에 사용되는 파쇄기로는 조크러셔 또는 콘크러셔를 채택하는 것이 바람직하다.Shredding step (S10) is a step of crushing by putting the construction waste such as waste concrete into the shredder, it is preferable to adopt a jaw crusher or a concrete crusher as a shredder used for the shredding.

다음으로 선별단계(S20)는 파쇄단계(S10)에서 파쇄된 골재를 선별하는 단계로서, 선별에 사용되는 선별기로는 2단스크린 또는 평스크린을 채택하는 것이 바람직하다.Next, the sorting step (S20) is a step of sorting the aggregates crushed in the shredding step (S10), it is preferable to adopt a two-stage screen or a flat screen as the sorting machine used for the sorting.

상기 선별기에서 선별된 골재 중 원하는 입도보다 작을 경우 구모르타르로 처리하여 배출하고 원하는 입도보다 클 경우는 다시 파쇄기로 보내어 재파쇄한다. 상기와 같은 파쇄단계(S10)와 선별단계(S20)를 반복적으로 실시하여 원하는 입도의 골재를 생산한다. 여기서 원하는 입도가 여러 구간일 경우 선별기를 다수의 단으로 설치하여 골재를 입도별로 선별할 수 있음은 물론이다.If less than the desired particle size of the aggregate selected by the sorting machine is treated with gumortar and discharged, if larger than the desired particle size is sent back to the crusher and re-crushed. By repeatedly performing the shredding step (S10) and the selection step (S20) as described above to produce aggregate of the desired particle size. Here, if the desired granularity is in several sections, it is a matter of course that the aggregate can be sorted by granularity by installing a selector in multiple stages.

다음으로 마쇄단계(S30)는 선별단계(S20)에서 원하는 입도로 선별된 골재를 마쇄기에 공급하고 마쇄기에서 골재들을 물리적으로 마찰시켜 구모르타르를 제거하는 단계이다. 상기 골재를 마쇄하기 위하여 사용되는 마쇄기는 내부에 중공이 형성된 원통으로서 회전가능하게 구비된다. 상기 마쇄기가 회전하면 원통의 내주면을 따라 골재가 구르고 이 때의 구름마찰력에 의해 골재의 표면과 구모르타르사이에 전단력이 작용하여 골재의 표면으로부터 구모르타르를 탈리시킨다.Next, the grinding step (S30) is a step of supplying the aggregate selected to the desired particle size in the screening step (S20) to the grinding machine and physically rubbing the aggregates in the grinding machine to remove the mortar. The grinder used to grind the aggregate is rotatably provided as a cylinder having a hollow formed therein. When the grinding machine rotates, the aggregate rolls along the inner circumferential surface of the cylinder, and the shear force acts between the surface of the aggregate and the mortar by the rolling friction at this time, thereby detaching the mortar from the surface of the aggregate.

다음으로 부상분리단계(S40)는 마쇄단계(S30)에서 구모르타르가 제거된 골재를 부유물 선별기의 세척수에 투입하여 골재의 표면에 잔존해 있는 구모르타르를 부상분리시키는 단계이다. 상기 마쇄단계(S30)에서 표면의 구모르타르가 대부분 제거되었지만 표면에는 아직도 구모르타르가 잔존하고 있다. 이러한 구모르타르를 제거하기 위하여 골재를 세척수가 담겨 있는 부유물 선별기에 투입하여야 한다. 여기서, 부유물 선별기는 세척수가 담겨 있는 용기로서 부유물 선별기에 투입된 골재는 표면의 이물질이 물과의 비중차에 의해 부상분리하는 용기이다.Next, the flotation separation step (S40) is a step of separating and removing the gumortar remaining on the surface of the aggregate by inputting the aggregate in which the gumortar is removed in the grinding step (S30) to the wash water of the float sorter. In the grinding step S30, most of the surface mortar was removed, but still remains on the surface. In order to remove such mortar, the aggregate should be put into a float sorter containing washing water. Here, the float sorter is a container in which the washing water is contained, and the aggregate introduced into the float sorter is a container in which foreign matters on the surface are separated by floating due to specific gravity with water.

또한, 상기 골재의 표면에 잔존해 있는 구모르타르는 수산화칼슘(Ca(OH)2) 성분을 포함하고 있어 강한 알칼리성을 띄고 있다. 따라서 상기 세척수는 알칼리성분과 화학반응이 활발히 일어나면서 구모르타르를 탈리하기 위하여 산성인 것이 바람직하다. 따라서, 상기 세척수는 구모르타르 중의 수산화칼슘(Ca(OH)2)과 화학적으로 결합하여 염이 생성되고, 생성된 염은 골재의 표면으로부터 탈리되어 바닥으로 침전된다. 상기 세척수의 수소이온농도는 2 이하이면 세척수에 투입해야 하는 황산 또는 염산의 양이 과도하게 많이 소용되고, 수소이온농도가 5 이상이면 산성인 세척수와 알칼리성인 구모르타르 사이에 반응이 활발하게 일어나지 않으므로 세척수의 수소이온농도는 2 내지 5 인 것이 바람직하다. 여기서, 세척수의 수소이온농도를 5이하로 신속하게 낮추기 위하여 염산 또는 황산을 사용하는 것이 바람직하다.In addition, the gu mortar remaining on the surface of the aggregate contains calcium hydroxide (Ca (OH) 2 ) component and exhibits strong alkalinity. Therefore, the washing water is preferably acidic to desorb gumortar while active chemical reaction with the alkaline component. Thus, the wash water is chemically bonded to calcium hydroxide (Ca (OH) 2 ) in gumortar to form a salt, and the resulting salt is released from the surface of the aggregate and precipitates to the bottom. When the hydrogen ion concentration of the washing water is 2 or less, the amount of sulfuric acid or hydrochloric acid to be added to the washing water is excessively used, and when the hydrogen ion concentration is 5 or more, the reaction does not occur actively between the acidic washing water and alkaline gumortar. The hydrogen ion concentration of the washing water is preferably 2 to 5. Here, it is preferable to use hydrochloric acid or sulfuric acid to quickly lower the hydrogen ion concentration of the washing water to 5 or less.

상기와 같이 구모르타르 중의 성분인 수산화칼슘이 황산 또는 염산과 결합하는 경우 그 화학반응식은 아래의 식 (1) 또는 식 (2)와 같다.As described above, when calcium hydroxide, which is a component in the gumortar, is combined with sulfuric acid or hydrochloric acid, the chemical reaction formula is as shown in Equation (1) or (2) below.

Figure 112006083988141-pat00001
----- 식(1)
Figure 112006083988141-pat00001
----- Formula (1)

Figure 112006083988141-pat00002
----- 식(2)
Figure 112006083988141-pat00002
----- Formula (2)

또한, 부유물 선별기에는 후술하는 건조단계에서 폐목재의 소각시 발생되는 가스인 이산화탄소가 투입되는 것이 바람직하다. 상기 폐목재의 소각시 발생되는 폐가스를 수집하기 위한 집진장치와 이 집진장치에 수집된 폐가스를 부유물 선별기에 대한 구체적인 구성은 당업자에게 자명한 것이므로 자세한 설명은 생략한다.In addition, it is preferable that carbon dioxide, which is a gas generated during incineration of waste wood, is introduced into the float sorter in a drying step described later. The detailed configuration of the dust collector and the waste gas collected by the dust collector for collecting the waste gas generated during incineration of the waste wood is obvious to those skilled in the art, so a detailed description thereof will be omitted.

상기 부유물 선별기에 이산화탄소가 투입되면 물과 반응하여 탄산수가 되고 탄산수는 골재의 표면에 부착되어 있는 다량의 수산화칼슘 성분을 포함하고 있는 구모르타르와 반응하여 탄산칼슘이 되면서 골재의 표면으로부터 탈리되므로 더욱 고품질의 순환골재를 생산할 수 있다. 또한 골재를 건조하기 위하여 발생된 폐가스인 이산화탄소를 사용함에 따라 자원을 재활용하여 환경을 보호하는 데 도움이 된다. 더불어 상기 부유물 선별기에 투입된 기체는 세척수를 교반시키므로 화학반응이 일어나는 것을 촉진하여 생산성이 향상되는 효과가 있다.When carbon dioxide is added to the float sorter, carbon dioxide is reacted with water and carbonated water reacts with gumortar containing a large amount of calcium hydroxide, which is attached to the surface of the aggregate, to form calcium carbonate and desorbs from the surface of the aggregate. Can produce recycled aggregates. In addition, the use of carbon dioxide, a waste gas generated to dry aggregates, helps to protect the environment by recycling resources. In addition, the gas introduced into the float sorter has an effect of increasing productivity by stirring the washing water to promote a chemical reaction.

상기와 같이 이산화탄소가 물과 반응하여 탄산수가 되고 탄산수가 수산화칼슘과 반응하여 탄산칼슘이 침전되는 화학반응식은 아래의 식(3) 및 식(4)와 같다.As described above, the carbon dioxide reacts with water to form carbonated water and the carbonated water reacts with calcium hydroxide to precipitate calcium carbonate, as shown in Equations (3) and (4) below.

Figure 112006083988141-pat00003
-------------------------식(3)
Figure 112006083988141-pat00003
------------------------- Equation (3)

Figure 112006083988141-pat00004
--------식(4)
Figure 112006083988141-pat00004
-------- Equation (4)

다음으로 건조단계(S50)는 부유물 선별기에서 배출된 골재를 건조시키는 단계로서, 폐목재를 연소시켜 발생된 고온의 가스를 이용하여 골재를 건조시킨다. 상기 폐목재의 연소시 발생된 가스는 이산화탄소로서 상기의 부유물 선별기 세척수에 공급되어 세척수를 탄산수가 되도록 한다. 상기 폐목재를 연소시키는 보일러에 대하여는 당업자라면 누구나 알 수 있으므로 자세한 설명은 생략하기로 한다.Next, the drying step (S50) is a step of drying the aggregate discharged from the suspended matter sorter, drying the aggregate using the hot gas generated by burning the waste wood. The gas generated during the combustion of the waste wood is supplied as carbon dioxide to the float sorter washing water so that the washing water is carbonated water. Anyone skilled in the art will know about the boiler for burning the waste wood, so a detailed description thereof will be omitted.

앞에서 설명되고, 도면에 도시된 본 발명의 실시예는, 본 발명을 기술적 사상을 한정하는 것으로 해석되어서는 안 된다. 본 발명의 보호범위는 청구범위에 기재된 사항에 의하여만 제한되고, 본 발명의 기술분야에서 통상의 지식을 가진 자는 본 발명의 기술적 사상을 다양한 형태로 개량 변경하는 것이 가능하다. 따라서 이러한 개량 및 변경은 통상의 지식을 가진 자에게 자명한 것인 한 본 발명의 보호범위에 속하게 될 것이다.The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

상기와 같은 순환골재 생산방법은 골재의 표면에 부착된 구모르타르를 물리적으로 마찰시켜 제거하므로 골재의 표면에 견고하게 고착되어 있는 구모르타르도 제거할 수 있어 고품질의 제품을 생산할 수 있다. The circulating aggregate production method as described above physically rubs off the mortar adhering to the surface of the aggregate, so that it is possible to remove the mortar firmly fixed to the surface of the aggregate, thereby producing a high-quality product.

또한, 상기와 같은 생산방법은 산성인 세척수를 사용하므로 골재의 표면에 부착되어 있는 알칼리성분인 구모르타르가 산성인 세척수와 반응하여 빠르게 탈리되므로 생산성이 향상된다.In addition, the production method as described above uses acidic washing water, so the productivity of the guartar, which is an alkali component attached to the surface of the aggregate, is rapidly desorbed by reacting with the acidic washing water.

또한, 상기와 같은 순환골재 생산방법은 부유물 선별기에 폐목재의 연소시 발생된 이산화탄소를 투입하여 세척수를 산성화시키므로 자원을 재활용함에 따라 환경을 보호하는 데 도움이 된다.In addition, the recycled aggregate production method as described above helps to protect the environment by recycling the resources to acidify the wash water by inputting the carbon dioxide generated during the combustion of the waste wood in the float sorter.

또한, 상기와 같은 순환골재 생산방법은 배출된 골재를 건조시키므로 콘크리트용 뿐 만아니라 미장용으로도 사용이 가능한 골재를 생산할 수 있다.In addition, the recycled aggregate production method as described above can dry the discharged aggregates can produce aggregates that can be used not only for concrete but also for plastering.

Claims (5)

건축폐기물을 파쇄기에 투입하여 파쇄하는 파쇄단계와, 상기 파쇄단계에서 파쇄된 골재를 선별기에 투입하여 선별하는 선별단계와, 상기 선별단계에서 선별된 골재를 부유물 선별기에 투입하여 골재에 부착되어 있는 이물질을 부상 분리시키는 부상분리단계와, 상기 부상분리단계에서 이물질이 부상 분리된 골재를 건조시키는 건조단계를 포함하는 순환골재 생산방법에 있어서,The crushing step of crushing by putting the construction waste into the crusher, the sorting step of sorting by inputting the aggregate crushed in the crushing step, and the foreign matter attached to the aggregate by inputting the aggregate selected in the sorting step to the float sorter In the circulating aggregate production method comprising a floating separation step of separating the flotation, and drying the aggregate separated from the flotation in the floating separation step, 상기 선별단계와 상기 부상분리단계 사이에 상기 선별단계에서 선별된 골재를 마쇄기에 투입하여 골재의 표면에 부착된 구모르타르를 물리적으로 마찰시켜 제거하는 마쇄단계를 더욱 포함하는 것을 특징으로 하는 순환골재 생산방법.Between the sorting step and the flotation separation step, the aggregate selected in the sorting step to the crusher by crushing aggregates produced by pulverizing physically rubbed off the mortar adhering to the surface of the aggregate further comprising the circulating aggregate production Way. 제1항에 있어서,The method of claim 1, 상기 건조단계는 폐목재를 연소시켜 발생된 이산화탄소를 이용하여 골재를 건조시키는 것을 특징으로 하는 순환골재 생산방법.The drying step is a cycle aggregate production method characterized in that for drying the aggregate using carbon dioxide generated by burning the waste wood. 제1항 또는 제2항에 있어서,The method according to claim 1 or 2, 상기 건조단계에서 폐목재의 연소시 발생된 이산화탄소를 상기 부유물 선별기에 투입하여 상기 세척수를 산성화시키는 것을 특징으로 하는 순환골재 생산방 법.The method of producing a circulating aggregate, characterized in that the washing water is acidified by injecting carbon dioxide generated during combustion of waste wood in the drying step into the float sorter. 제1항 또는 제2항에 있어서,The method according to claim 1 or 2, 상기 부유물 선별기의 세척수는 수소이온농도가 2 내지 5 인 것을 특징으로 하는 순환골재 생산방법.The washing water of the suspended solids selector is a circulation aggregate production method, characterized in that the hydrogen ion concentration is 2 to 5. 제3항에 있어서,The method of claim 3, 상기 부유물 선별기의 세척수는 수소이온농도가 2 내지 5 인 것을 특징으로 하는 순환골재 생산방법.The washing water of the suspended solids selector is a circulation aggregate production method, characterized in that the hydrogen ion concentration is 2 to 5.
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KR20060070513A (en) * 2006-06-03 2006-06-23 이상청 Recycling aggregate manufacturing system

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KR100956161B1 (en) * 2007-11-27 2010-05-06 주식회사 그린환경 The process of manufacture with a high quality of aggregate of circulation using the process water of sulfuric acid and the tirturation device of low speedy solution
KR100979005B1 (en) * 2008-07-16 2010-08-30 한일시멘트 (주) A mortar method used recycled aggregates and mortar thereof
KR101133777B1 (en) * 2009-01-12 2012-04-05 임정빈 Method for neutralized strong alkaline leachate from circulation aggregate
KR101006229B1 (en) * 2010-04-09 2011-01-07 (유) 씨엔지알텍 A production system of low-alkali recycled aggregate
KR20160069278A (en) 2014-12-08 2016-06-16 홍익대학교세종캠퍼스산학협력단 Method for determining mortar content of recycled concrete aggregate sample
CN109678378A (en) * 2019-03-08 2019-04-26 泗县惠赐建材有限公司 A kind of application of building waste treatment process and gained recycled aggregate
KR20210120328A (en) * 2020-03-26 2021-10-07 이원희 Apparatus of manufacturing recycled aggregates derived from construction waste
KR102469347B1 (en) * 2020-03-26 2022-11-22 이원희 Apparatus of manufacturing recycled aggregates derived from construction waste

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