KR20110088025A - A producing method of recycled aggregate and calcium nitrate use construction waste - Google Patents
A producing method of recycled aggregate and calcium nitrate use construction waste Download PDFInfo
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- KR20110088025A KR20110088025A KR20100007733A KR20100007733A KR20110088025A KR 20110088025 A KR20110088025 A KR 20110088025A KR 20100007733 A KR20100007733 A KR 20100007733A KR 20100007733 A KR20100007733 A KR 20100007733A KR 20110088025 A KR20110088025 A KR 20110088025A
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- recycled aggregate
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- pulverized
- concrete
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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
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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
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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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
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F9/00—Fertilisers from household or town refuse
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- 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
Abstract
Description
본 발명은 폐콘크리트를 이용하여 순환골재와 질산석회비료를 제조하는 방법에 관한 것으로 건축폐기물 중 폐콘크리트를 분쇄한 후에 질산과 반응시켜 석회성분을 제거하여 골재을 생산하여 순환골재로 사용하며, 질산과 석회성분의 반응으로 생긴 부산물인 질산석회비료를 제조하는 방법에 관한 것이다.The present invention relates to a method for producing recycled aggregate and nitrate fertilizer using waste concrete. After crushing the waste concrete in the building waste, it is reacted with nitric acid to remove the lime component to produce aggregate and use it as recycled aggregate. It relates to a method for producing a lime nitrate fertilizer which is a by-product resulting from the reaction of lime components.
건축폐기물은 일반적으로 각종 건축물을 철거 시에 발생되는 폐건축자재를 뜻하는 것으로 주로 철근류와 시멘트 덩이인 폐콘크리트, 폐목재, 폐플라스틱, 등이 대부분을 차지한다. 이러한 건축폐기물은 대개는 합법적인 절차에 따라 가연성 폐기물은 소각하고, 폐콘크리트 같은 비 가연성 폐기물은 분쇄하여 도로 기층제 등에 재활용하고 있으나, 재활용 범위가 콘크리트용 골재로 재활용하지는 못하는 실정이다.Building waste generally refers to the waste building materials generated when dismantling various buildings, and most of them are made of reinforcement and cement lumps such as waste concrete, waste wood, and waste plastics. Such construction wastes are usually incinerated according to a legal procedure, and non-combustible wastes such as waste concrete are crushed and recycled to road foundations, but the recycling scope cannot be recycled to concrete aggregates.
그러나 비록, 건축폐기물을 합법적으로 재활용된다고 하더라도 콘크리트용 골재로 사용하지 못하므로, 건축 및 건설자재 중 골재 류가 천연골재 공급이 고갈 되는 상태에서 골재의 공급을 위해 바다 속에 있는 골재를 채취하여 바다 환경을 파괴하고 있으며, 부순 골재를 생산하기 위해 산을 파괴하여 자연 환경을 파괴되고 있어 큰 문제로 대두되고 있다.However, even though construction wastes are legally recycled, they cannot be used as concrete aggregates. Therefore, aggregates in the sea are collected by collecting aggregates in the sea for supply of aggregates when natural aggregates are depleted among construction and construction materials. It is destroying the mountain and destroying the natural environment to produce crushed aggregate, which is a big problem.
그러나, 이러한 순환골재는 흡수율 등의 요인으로 인하여 콘크리트용 골재로서 사용하기에 천연 골재 및 부순 골재에 비해 콘크리트 강도가 낮아지는 문제점 등이 있다.However, such circulating aggregates have problems such as low concrete strength compared to natural aggregates and crushed aggregates to be used as concrete aggregates due to factors such as absorption rate.
따라서, 이러한 순환골재를 제조하는 여러 가지 방법이 개발되고 있으며, 이러한 방법은 습식 처리법과 건식 처리법의 두 가지로 구분될 수 있다.Therefore, various methods for producing such recycled aggregates have been developed, and these methods may be divided into two types, a wet treatment method and a dry treatment method.
습식 처리법과 건식 처리법의 방법 등이 있으나 아직까지도 순환골재에 부착되어 있는 석회성분으로 인하여 고 품질의 순환골재를 생산되지 못하고 있다.There are wet treatment methods and dry treatment methods, but still, high-quality recycled aggregates cannot be produced due to the lime components attached to the recycled aggregates.
본 발명의 목적은 폐콘크리트를 분쇄하여 순환골재를 생산하는데 골재 표면에 부착된 시멘트 성분 중의 석회성분을 제거하여 고품질인 콘크리트용 골재를 생산하고, 생산과정에서 발생된 부산물을 활용하기 위한 것이다.An object of the present invention is to produce high-quality concrete aggregates by removing the lime components in the cement components attached to the aggregate surface to produce recycled aggregates by grinding waste concrete, and to utilize the by-products generated in the production process.
본 발명에서는 폐콘크리트를 분쇄하여 순환골재를 생산하는데 골재 표면에 부착된 시멘트 성분 중의 석회성분을 제거하기 위하여 질산을 투입하므로서 고품질인 콘크리트용 골재를 생산하고, 생산과정에서 발생된 부산물인 질산석회를 비료로 활용하기 위한 것이다.In the present invention, to produce recycled aggregates by pulverizing waste concrete to produce high-quality concrete aggregates by adding nitric acid in order to remove the lime components in the cement components attached to the aggregate surface, lime nitrate which is a by-product generated in the production process It is intended to be used as a fertilizer.
본 발명에 따르면, 질산으로 순환골재 표면에 부착된 시멘트 성분인 석회를 제거하므로써 콘크리트 강도가 낮게 되는 요인인 흡수율 등이 적정하게 되어 고품질의 콘크리용 순환골재로 제공하여 순환골재의 사용법위를 넓일 수 있다.According to the present invention, by eliminating the lime, which is a cement component attached to the surface of circulating aggregates with nitric acid, the absorption rate, which is a factor that lowers the concrete strength, is appropriate, so that the use of circulating aggregates can be broadened by providing a high-quality recycled aggregate for concrete. have.
또한, 부산물로 질산석회를 회수하므로, 염기성 비료로 이용 가능하여 재활용 범위를 넓일 수 있다.In addition, since the recovery of lime nitrate as a by-product, it can be used as a basic fertilizer can extend the recycling range.
본 발명은 폐콘크리트를 이용하여 순환골재와 질산석회비료를 제조하는 방법에 관한 것으로 건축폐기물 중 폐콘크리트를 분쇄한 후에 질산과 반응시켜 석회성분을 제거하여 골재을 생산하여 순환골재로 사용하며, 질산과 석회성분의 반응으로 생긴 부산물인 질산석회비료를 제조하는 방법에 관한 것이다.The present invention relates to a method for producing recycled aggregate and nitrate fertilizer using waste concrete. After crushing the waste concrete in the building waste, it is reacted with nitric acid to remove the lime component to produce aggregate and use it as recycled aggregate. It relates to a method for producing a lime nitrate fertilizer which is a by-product resulting from the reaction of lime components.
바람직하게는, 본 발명은, 폐콘크리트에서 이물질을 제거한 후 일정 크기로 분쇄하는 제 1 단계; 상기 분쇄된 콘크리트 분쇄물을 건식처리하거나 습식처리하여 슬러지을 제거하는 제 2 단계; 상기 슬러지가 제거된 분쇄물에 대하여 질산 수용액을 첨가하는 제 3 단계; 상기 반응을 마친 분쇄물을 순환골재와 질산석회 수용액을 분리하여 석회 성분이 없는 순환골재를 생산하는 제 4 단계; 질산석회 수용액을 130∼150℃로 가열 건조하여 비료공정규격에 적합하게 하여 질산석회비료를 생산하는 제 5 단계;를 포함하는 폐콘크리트로부터 순환골재와 질산석회비료를 제조하는 방법을 제공한다.Preferably, the present invention, the first step of removing the foreign matter from the waste concrete and then crushed to a predetermined size; A second step of removing sludge by dry or wet treatment of the pulverized concrete pulverized product; A third step of adding an aqueous nitric acid solution to the ground sludge removed; A fourth step of separating the pulverized aggregate after the reaction to produce a circulating aggregate having no lime component by separating the circulating aggregate and the aqueous solution of lime nitrate; It provides a method for producing recycled aggregates and lime nitrate fertilizer from the waste concrete comprising; a fifth step of heating and drying the aqueous solution of lime nitrate to 130 ~ 150 ℃ to meet the fertilizer process standards to produce the lime nitrate fertilizer.
본 발명의 상기 방법에 따른 전체 화학 반응식은 다음과 같다:The overall chemical scheme according to the method of the present invention is as follows:
Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2OCa (OH) 2 + 2HNO 3 → Ca (NO 3 ) 2 + 2H 2 O
본 발명에서는In the present invention
이하 실시 예를 참조로 하여 본 발명을 기재하지만, 이로써 본 발명을 한정하고자 하는 것은 아니다.The present invention will be described with reference to the following Examples, which are not intended to limit the present invention.
통상의 습식 또는 건식 방법으로 분쇄하고 슬러지를 제거한 다음에 분쇄물인 순환골재의 100Kg에 대하여 질산 수용액으로 5∼10Kg을 첨가하여 접촉시켜 반응하도록 하였다. 분쇄물 표면에 부착된 시멘트 성분인 석회성분이 질산 수용액에 의해 질산석회 수용액로 변환하고 분리 되므로서 고 품질의 순환골재가 생산되었다.After grinding by the usual wet or dry method and removing the sludge, 5 to 10 Kg of nitric acid solution was added to the 100 Kg of the circulating aggregate which is the pulverized product to be contacted to react. High-quality recycled aggregates were produced by converting and separating the lime component, the cement component attached to the ground surface, into an aqueous solution of lime nitrate and separating it.
위에서 표기한 화학 반응식에 따라 석회 성분을 녹여 내기 위해서는 질산 수용액이 필요하다.A solution of nitric acid is required to dissolve the lime component according to the chemical reaction formula described above.
질산은 이산화질소(NO2)를 물에 녹여서 제조하는데, 진한 질산은 68％의 질산 수용액으로 시중에 판매되고, 순환골재의 중량에 대하여 석회 성분이 3∼5％가 있으므로, 순환골재의 100Kg에 대하여 진한 질산 수용액으로 5∼10Kg가 필요하다.Nitric acid is prepared by dissolving nitrogen dioxide (NO 2 ) in water. Concentrated nitric acid is commercially available as an aqueous nitric acid solution of 68%, and since the lime component is 3 to 5% by weight of the circulating aggregate, it is concentrated to 100 kg of circulating aggregate. 5-10 kg is required as an aqueous solution.
질산석회(Ca(NO3)2)는 백색 마름모 주상 결정이며, 건조한 공기 중에서 풍화되며 습한 공기 중에는 조해된다. 질산석회는 수화물과 무수물로 존재하는데, 수화물은 질산석회 사수화물(Ca(NO3)2·4H2O)로 존재하는데 42.5℃에서 결정수에 의해 녹고 130℃ 이상에서는 질산석회 무수물(Ca(NO3)2)로 된다.Lime nitrate (Ca (NO 3 ) 2 ) is a white rhombic columnar crystal, weathered in dry air and deliquescent in wet air. Lime nitrate is present as a hydrate and anhydride. The hydrate is present as a lime nitrate tetrahydrate (Ca (NO 3 ) 2 · 4H 2 O), which is dissolved by crystallized water at 42.5 ° C, and lime nitrate anhydride (Ca (NO) above 130 ° C. 3 ) 2 ).
또한, 질산석회(Ca(NO3)2)가 비료로 사용할 수 있도록 하기 위해서는 비료 관리법에 의한 비료공정규격에 맞아야 한다.In addition, in order for lime (Ca (NO 3 ) 2 ) to be used as fertilizer, it must meet the fertilizer process standard under the Fertilizer Control Act.
질산석회(Ca(NO3)2) 비료의 비료공정규격은, 질소질 비료로서 함유하여야 할 주성분의 최소량(％)이 질산태 질소로 10％이다.In the fertilizer process standard for lime nitrate (Ca (NO 3 ) 2 ) fertilizer, the minimum amount (%) of the main component to be contained as a nitrogenous fertilizer is 10% in nitrogen nitrogen.
위의 반응으로 생성된 질산석회 수용액은 질소질 비료로서 함유하여야 할 주성분의 최소량(％)이 질산태 질소가 10％가 되지 않고 액체 상태로 존재하기 때문에, 질산석회 무수물 또는 질산석회 사수화물의 고체로 제조하기 위하여 130∼150℃로 가열 건조하여 비료 공정 규격에 적합하도록 하여 비료를 생산한다.The aqueous solution of lime nitrate produced by the above reaction is used as a solid of lime nitrate anhydride or lime nitrate tetrahydrate because the minimum amount (%) of the main components to be contained as nitrogenous fertilizer is present in the liquid state without the nitrogen nitrogen being 10%. To manufacture, fertilizers are produced by heating to 130-150 ° C. to meet the fertilizer process specifications.
도 1은 본 발명에 따른 방법의 개략적인 순환골재 및 질산석회비료 생산 공정도이다.1 is a schematic process chart of the production of recycled aggregate and lime nitrate fertilizer of the method according to the present invention.
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| CN112876193A (en) * | 2021-02-05 | 2021-06-01 | 湖南省富民乐建材科技发展有限公司 | Gypsum-based sand-free self-leveling production method based on energy-saving building |
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| CN112876193A (en) * | 2021-02-05 | 2021-06-01 | 湖南省富民乐建材科技发展有限公司 | Gypsum-based sand-free self-leveling production method based on energy-saving building |
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