KR101133777B1 - Method for neutralized strong alkaline leachate from circulation aggregate - Google Patents
Method for neutralized strong alkaline leachate from circulation aggregate Download PDFInfo
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- KR101133777B1 KR101133777B1 KR1020090002814A KR20090002814A KR101133777B1 KR 101133777 B1 KR101133777 B1 KR 101133777B1 KR 1020090002814 A KR1020090002814 A KR 1020090002814A KR 20090002814 A KR20090002814 A KR 20090002814A KR 101133777 B1 KR101133777 B1 KR 101133777B1
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/10—Frying pans, e.g. frying pans with integrated lids or basting devices
- A47J37/101—Integrated lids
- A47J37/103—Broiling- or heating-lids
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0611—Roasters; Grills; Sandwich grills the food being cooked between two heating plates, e.g. waffle-irons
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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
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- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S220/00—Receptacles
- Y10S220/912—Cookware, i.e. pots and pans
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Abstract
본 발명은 순환골재의 강한 알카리성 침출수를 미리 중화하는 방법에 관한 것이다.The present invention relates to a method for neutralizing the strong alkaline leachate of circulating aggregate in advance.
더욱 상세하게는, 본 발명은 순환골재의 강한 알카리성 침출수를 미리 중화하는 방법으로서, 폐 콘크리트 등으로 제조된 순환골재에 미리 제조 된 산성 공정수인 1～20중량％의 묽은 황산 용액이나, 탄산수를 투입하여 공정수의 수소이온농도가 pH 7이 될 때까지 연속적으로 투입하여 강 알카리성 침출수를 사전 중화하는 방법이다. 수소이온농도가 pH 7이 된 공정수는 다시 황산이나 탄산가스를 투입하여 산성 공정수인 황산용액이나 탄산수를 제조하여 순환골재의 중화제로 연속하여 사용하는, 순환골재의 강한 알카리성 침출수를 미리 중화하는 방법에 관한 것이다.More specifically, the present invention is a method for neutralizing the strong alkaline leachate of circulating aggregates in advance, the dilute sulfuric acid solution or carbonated water of 1 to 20% by weight of acidic process water prepared in advance in circulating aggregates made of waste concrete, etc. It is a method of pre-neutralizing the strong alkaline leachate by adding it continuously until the hydrogen ion concentration of process water reaches pH 7. Process water with pH 7 is prepared by neutralizing strong alkaline leachate of circulating aggregate, which is prepared by adding sulfuric acid or carbonic acid gas to produce sulfuric acid solution or carbonated water as acidic process water and continuously using it as neutralizing agent of circulating aggregate. It is about a method.
순환골재, 황산, 탄산수,Circulating aggregate, sulfuric acid, carbonated water,
Description
본 발명은 순환골재를 도로 기층제, 매립, 복토 등에 사용한 후에, 강우 또는 지하수의 물에 의해 순환골재에서 강 알카리성의 침출수가 생성되어 토양 및 수질에 오염되는데, 순환골재를 미리 중화 처리하여 토양 및 수질에 오염되는 것을 방지하는 방법에 관한 것이다.According to the present invention, after using recycled aggregates, road alkaline, landfill, cover soil, etc., strong alkaline leachate is generated from recycled aggregates by rainfall or groundwater water, which is contaminated with soil and water quality. The present invention relates to a method for preventing contamination of water quality.
산업 현장에서 배출되는 건설 폐기물은 건설 폐기물의 재활용촉진에 관한 법률에 의거하여, 친환경적으로 적정처리하고 재활용을 촉진하여 국가자원의 효율적 이용은 물론 국민경제발전과 공공복리증진에 기여함을 목적으로 활용하도록 규정되어 있다.Construction waste discharged from industrial sites is used for the purpose of contributing to the efficient use of national resources as well as to the national economic development and public welfare by pursuing environmentally sound and proper recycling in accordance with the law on promoting recycling of construction waste. It is prescribed to
건설 폐기물의 재활용 촉진을 위하여 재활용 용도를 도로공사용, 건설공사용, 주차장 또는 농로의 표토용 등으로 사용도록 법률로 규정하였으며, 건설 폐기물을 분쇄, 선별 등을 거쳐 순환골재를 생산하게 되는데, 법률에 정한 순환골재의 품질기준에 적합하게 한 것을 사용하도록 하였다.In order to promote the recycling of construction wastes, the law stipulates the use of recycling for road work, construction work, parking lot or topsoil of farm roads, and produces recycled aggregates by crushing and sorting construction wastes. It was to be used to meet the quality standards of recycled aggregate.
법률에 정한 순환골재의 품질기준은, 재활용 용도에 따라 순환골재의 입도와 순환골재의 품질로 소성지수, 마모감량, 안정성 등이 기준에 적합하여야 하고, 이물질 함량이 유기이물질 1％(용적기준)와 무기이물질 5％(질량기준)이하이어야 하도록 규정하고 있다.According to the law, the quality standards of recycled aggregates should be suitable for the recycling index, wear loss, stability, etc., depending on the recycled use, and the foreign matter content is 1% (volume basis). And inorganic foreign matters must be less than 5% (by mass).
그러나, 순환골재를 재활용 용도에 따라 법률이 정한 순환골재의 품질기준에 맞게 사용하더라도, 재활용된 순환골재는 강우나 지하수에 의하여 순환골재에서 강 알카리성 침출수가 생기게 된다.However, even if recycled aggregates are used in accordance with the quality standards of recycled aggregates according to the law for recycling purposes, recycled recycled aggregates generate strong alkaline leachate from recycled aggregates due to rainfall or groundwater.
순환골재에서 생긴 침출수는 폐 콘크리트의 성분에 의하여 수소이온농도가 pH 12 이상의 강 알카리성이므로, 순환골재의 재활용 지역은 강우나 지하수에 의해 수질오염이 생기는 것이 당연할 것이다.Leachate from circulating aggregates is strongly alkaline due to the hydrogen ion concentration of pH 12 or more, depending on the composition of the waste concrete. Therefore, it is natural that the recycling area of circulating aggregates will be water pollution caused by rainfall or groundwater.
순환골재의 재활용 지역은, 수질오염에 의하여 어류가 죽게 되고, 물과 함께 생활하는 조류도 죽게 되어 생태계를 교란 시키게 되어 환경오염 지역으로 될 수밖에 없다.Recycled aggregates of recycled aggregates, where fish are killed by water pollution, and algae living with water are also killed, disrupting the ecosystem and becoming an environmental pollution area.
따라서, 법률에 정한 순환골재의 품질기준에는 순환골재의 침출수에 대한 규정이 있어야 하며, 순환골재에서 생기는 강 알카리성 침출수를, 사전에 강 알카리성 침출수가 나오지 않게 처리 하여 강 알카리성 침출수가 나오지 않는 순환골재로 수질오염을 없애고 안전한 순환골재 사용을 할 수 있게 하는 방법이 요구하고 있다.Therefore, the quality standards of circulating aggregates must be defined in the legislation for the leachate of circulating aggregates, and the strong alkaline leachate from circulating aggregates is treated in advance so that the strong alkaline leachate does not come out. There is a need for a method that eliminates water pollution and enables safe use of recycled aggregates.
본 발명은 순환골재의 강 알카리성 침출수를 미리 중화하는 방법에 관한 것이다. 더욱 상세하게는, 본 발명은 순환골재의 강 알카리성 침출수를 사전에 중화하는 방법으로서, 폐 콘크리트 류 등으로 제조된 순환골재에 미리 제조 된 산성 공정수인 1～20중량％의 묽은 황산 용액이나, 탄산수를 투입하여 공정수의 수소이온농도가 pH 7이 될 때까지 연속적으로 투입하여 강 알카리성 침출수를 사전 중화하는 방법이다. 수소이온농도가 pH 7이 된 공정수는 다시 황산이나 탄산가스를 투입하여 산성 공정수인 황산용액이나 탄산수를 제조하여 순환골재의 중화제로 연속하여 사용하는, 순환골재의 강 알카리성 침출수를 사전에 중화하는 방법을 제공함을 목적으로 하고 있다.The present invention relates to a method for neutralizing the strong alkaline leachate of circulating aggregate in advance. More specifically, the present invention is a method for neutralizing the strong alkaline leachate of circulating aggregates in advance, a dilute sulfuric acid solution of 1 to 20% by weight of acidic process water prepared in advance in circulating aggregates made of waste concrete, It is a method of pre-neutralizing strong alkaline leachate by adding carbonated water continuously until the hydrogen ion concentration of process water reaches pH 7. The process water whose pH has reached pH 7 is neutralized in advance with strong alkaline leachate of recycled aggregate, in which sulfuric acid or carbonic acid gas is added again to produce sulfuric acid solution or carbonated water, which is an acid process water, and used continuously as a neutralizer of recycled aggregate. It aims to provide a way to do this.
이러한 목적을 달성하기 위한 본 발명의 방법의 구성은 이하와 같이 구성된다.The configuration of the method of the present invention for achieving this object is configured as follows.
건설 폐기물 중에 순환골재를 생산할 수 있는 것은 폐 콘크리트와 폐 블럭과 폐 벽돌(이하 폐 콘크리트와 폐 블럭과 폐 벽돌를 '폐콘크리트 류'으로 표기) 등이 있는데, 폐 콘크리트 류 들은 시멘트와 골재를 혼합하고 물과 수화반응을 일어나게 하여 경화시킨 물질이다.Among the construction wastes, recycled aggregates can be produced from waste concrete, waste blocks, and waste bricks (hereinafter referred to as waste concrete, waste blocks, and waste bricks as 'waste concrete'). It is a substance hardened by causing a hydration reaction with water.
순환골재를 생산하기 위해서는 폐 콘크리트 류 에 섞여 있는 이물질을 제거하고, 재활용 용도에 적합한 입도에 맞게 분쇄한다.In order to produce recycled aggregates, foreign substances mixed with waste concrete are removed and pulverized to a particle size suitable for recycling purposes.
그러나, 폐 콘크리트 류의 구성 요소는 골재와 시멘트이다. 골재는 규소화합물이기 때문에 물과 아무런 반응이 없으나, 시멘트는 물과 수화반응을 일으키게 하여 골재와 함께 경화되어 딱딱하게 굳게 되어 구조물을 지탱해주기 때문에 건축자재로 널리 사용하고 있는 것이다.However, the components of the waste concrete class are aggregate and cement. Aggregate has no reaction with water because it is a silicon compound, but cement is used widely as a building material because it causes a hydration reaction with water to harden and harden together with the aggregate to support the structure.
시멘트 성분은 물과 수화 반응에 의해 경화되더라도, 수화 반응 후의 생성물은 물과 접촉하게 되면 물은 강 알카리성 물로 전환이 된다.Although the cement component is cured by water and a hydration reaction, water is converted into strong alkaline water when the product after the hydration reaction comes into contact with water.
따라서, 폐 콘크리트 류를 분쇄하여 순환골재를 제조하게 되면, 시멘트의 성질에 의해 물과 접촉하면 강 알카리성 물로 전환되는데, 순환골재는 재활용 용도에 맞게 분쇄하기 때문에 분쇄 전보다 표면적이 넓어져 물과 접촉할 수 있는 면적이 많아지므로, 물과 접촉하게 되면 더 많은 강 알카리성 침출수가 생기게 되어 수질오염을 시킬 수 있다.Therefore, when the recycled aggregate is manufactured by pulverizing the waste concrete, it is converted into strong alkaline water when it comes into contact with water due to the properties of the cement. As the area can be increased, more contact with water can lead to more alkaline alkaline leachate, which can cause water pollution.
시멘트가 물과 수화반응을 한 후에 생성된 물질이 물과 접촉하면 강한 알카리성 물로 전환하는 성분을 찾아서, 그 성분을 변환시켜 물과 접촉하여도 아무런 반응이 없게 하여 안정화를 하게 되면 강 알카리성 물이 되지 않을 것이다.After the cement has hydrated with water, if the material is in contact with water, it finds a component that converts it into strong alkaline water, and converts the component so that it does not react even when it is in contact with water. Will not.
시멘트는 석회석과 점토 등을 고온으로 소성하여 미분쇄하여 만든 제품이다. 시멘트의 원료인 석회석과 점토는 물과 반응이 일어나지 않으나, 소성하여 미분쇄되면 물과 반응이 있게 되어 수화반응 후 경화되는데, 이런 반응을 있게 하는 것은 석회 성분이기 때문이다.Cement is a product made by calcination of limestone and clay at high temperature. Limestone and clay, which are the raw materials of cement, do not react with water, but when fired and pulverized, they react with water and harden after the hydration reaction, because it is the lime component.
경화된 시멘트 관련 생성물(콘크리트, 블록, 벽돌)은 석회 성분이 있으므로, 석회성분 중에 물과 접촉하여 강 알카리성 물로 생성케 하는 석회성분은 수산화석회이다.Since the hardened cement-related products (concrete, blocks, bricks) have a lime component, the lime component in contact with water to produce strong alkaline water is lime hydroxide.
폐 콘크리트 류로 순환골재를 제조하게 되면 경화된 시멘트 관련 생성물(콘크리트, 블록, 벽돌)은 석회 성분이 있으므로 수산화석회(수산화칼슘)이 있게 되고, 수산화석회(수산화칼슘)가 강우나 지하수에 녹아 강 알카리성 침출수를 생기게 된다.When the recycled aggregate is manufactured from waste concrete, the hardened cement-related products (concrete, block, brick) have lime components, so they have lime hydroxide (calcium hydroxide), and lime hydroxide (calcium hydroxide) is dissolved in rainfall or groundwater to produce strong alkaline leachate. Will be created.
따라서 수산화석회를 물에 녹지 않는 물질로 전환시키면 강우나 지하수에 의 해 강 알카리성 침출수가 생기지 않게 된다.Therefore, converting lime hydroxide into a material that is insoluble in water prevents strong alkaline leaching water from rainfall or groundwater.
수산화석회가 물에 녹지 않은 물질로 전환하기 위해서는 물에 녹지 않은 황산석회나, 탄산석회로 전환하게 되면 된다.To convert lime hydroxide into a material that is insoluble in water, it is necessary to convert it into lime sulfate or carbonate that is insoluble in water.
순환골재 내의 성분인 수산화석회와 황산 또는 탄산수과 반응시켜 황산석회 또는 탄산석회로 변환시켜 물에 녹는 물질을 사전에 제거하여 순환골재에서 나오는 강 알카리성 침출수를 나오지 않게 하는 것이다.Reaction with lime hydroxide and sulfuric acid or carbonated water, which is a component in recycled aggregates, is converted into lime sulfate or carbonate to remove substances dissolved in water in advance so that strong alkaline leachate from the recycled aggregates does not come out.
순환골재에 미리 묽은 황산 또는 탄산수로 중화 처리 할 때에 생긴 처리 된 공정수에 다시 묽은 황산 또는 탄산가스를 주입하여 연속적으로 처리할 수 있다.Dilute sulfuric acid or carbon dioxide can be continuously treated by injecting dilute sulfuric acid or carbonic acid gas into the treated process water generated when neutralizing the circulating aggregate with dilute sulfuric acid or carbonated water in advance.
본 발명은 순환골재의 강 알카리성 침출수를 미리 중화하는 방법으로서,The present invention is a method for neutralizing the strong alkaline leachate of circulating aggregate in advance,
폐 콘크리트 등으로 순환골재를 제조한 것을 공정수에 황산을 투입하여 제조된 산성 공정수인 1～ 20중량％의 묽은 황산 용액이나, 탄산수를 제조하는 단계; 제조된 산성 공정수인 1～20중량％의 묽은 황산 용액이나 탄산수를 도로 기층용, 매립용, 복토용의 순환골재에 공급하여 공정수의 수소이온농도가 pH 7이 될 때까지 연속하여 투입하는 단계; 수소이온농도가 pH 7로 된 공정수를 수거하는 단계; 수거 된 공정수에 다시 황산을 투입하여 제조한 산성 공정수인 1～20중량％의 묽은 황산 용액이나, 수거 된 공정수에 다시 탄산가스를 투입하여 탄산수를 제조하는 단계; 상기, 산성 공정수으로 다시 제조한 공정수를 순환골재에 공급하여 공정수를 재사용하는 단계를 포함하여, 순환골재의 강 알카리성 침출수를 미리 중화하는 방법을 제공하고 있다.Preparing 1-20% by weight of dilute sulfuric acid solution or carbonated water, which is an acidic process water prepared by adding sulfuric acid to the process water to produce recycled aggregate from waste concrete; 1-20% by weight of dilute sulfuric acid solution or carbonated water, which is produced acidic process water, is supplied to the circulating aggregate for road substrates, landfills, and cover soils, and is continuously added until the hydrogen ion concentration of the process water reaches pH 7. step; Collecting the process water having a hydrogen ion concentration of pH 7; Preparing carbonated water by adding carbon dioxide gas to 1-20 wt% of dilute sulfuric acid solution, which is an acidic process water prepared by adding sulfuric acid to the collected process water, or the collected process water; The method includes reusing the process water by supplying the process water re-produced with the acidic process water to the circulating aggregate, thereby providing a method of neutralizing the strong alkaline leachate of the circulating aggregate in advance.
순환골재는 건설 폐기물 중의 폐 콘크리트 류를 이물질을 제거하고 분쇄하므로 생산하는 것이다. 이렇게 생산된 순환골재는 도로공사용, 건설공사용, 주차장 또는 농로의 표토용 등을 사용도록 법률로 규정하였기에 의무적으로 사용하게 된다.Recycled aggregate is produced by removing and crushing waste concretes in construction wastes. The recycled aggregate produced in this way is mandatory because it is required by law to use road works, construction works, parking lots or topsoil of farm roads.
도로공사용, 건설공사용, 주차장 또는 농로의 표토용 등을 사용된 곳에서, 순환골재의 성분 중에서 강우나 지하수에 용출되는 물질에 의해 생태계를 교란시켜 어류나 물가에 사는 조류에 피해를 주는 사례가 늘고 있다.In places where road work, construction work, parking lot, or topsoil of farm roads are used, there are more cases of disturbing ecosystems caused by rain or groundwater eluting components of recycled aggregates, causing damage to fish and water birds. have.
폐 콘크리트 류는 골재와 시멘트를 혼합하고 물과 수화반응 속에 경화되어 단단한 물질되어 그에 맞는 용도로 활용하고 있다가, 용도가 다 되었을 때에 폐기되어 다시 순환골재로 재활용하게 된다.Waste concrete is mixed with aggregate and cement, cured in water and hydration reaction, and is used as a hard material for its purpose. It is discarded when it is used and recycled as recycled aggregate.
폐 콘크리트 류는 골재와 시멘트로 구성되어 있는데, 골재는 규소화합물이기 때문에 물에 용출된 물질이 없으나, 경화된 시멘트의 성분 중에 물에 용출되는 물질이 있어 강한 알카리성 물을 생기게 되어 수질오염을 일으키게 한다.Waste concrete is composed of aggregate and cement. Since aggregate is a silicon compound, there is no substance eluted in water, but among the components of hardened cement, there is a substance that is eluted in water, which causes strong alkaline water and causes water pollution. .
시멘트는 석회석과 점토 등을 900℃로 소성한 후에 약간의 석고을 혼합하여 미분쇄한 것으로 alite(3CaO?SiO2-C3S로 표기), belite(2CaO?SiO2-C2S로 표기) aluminate(3CaO?Al2O3-C3A로 표기), ferrite(4CaO?Al2O3?Fe2O3-C4AF로 표기)의 성분이 혼합된 물질이다.Cement limestone and clay, such as a later (shown in 3CaO? SiO 2 -C 3 S) some seokgoeul mixing pulverization by a alite and firing at 900 ℃, belite (2CaO? SiO 2 -C expressed as S 2) aluminate (Denoted 3CaO? Al 2 O 3 -C 3 A) and ferrite (denoted as 4CaO? Al 2 O 3 ? Fe 2 O 3 -C 4 AF).
시멘트의 성분에 alite는 50％내외, belite는 25％내외, aluminate는 10％내 외, ferrite도 10％내외로 구성되어 있는데, 이 성분들이 물과 수화반응을 하여 시멘트 자체를 경화시키는데, alite는 [반응식 1]과 같이 되고, belite는 [반응식 2]와 같이 된다.The composition of cement consists of about 50% of alite, about 25% of belite, about 10% of aluminate, and about 10% of ferrite.These components hydrate with water to cure the cement itself. It becomes as [Scheme 1], and belite becomes as [Scheme 2].
[반응식 1]Scheme 1
2C3S + 6H2O → C3S2?3H2O + 3Ca(OH)2 2C 3 S + 6H 2 O → C 3 S 2 -3H 2 O + 3Ca (OH) 2
[반응식 2]Scheme 2
2C2S + 4H2O → C3S2?3H2O + Ca(OH)2 2C 2 S + 4H 2 O → C 3 S 2 3H 2 O + Ca (OH) 2
[반응식 1]과 [반응식 2]를 보면 물과 반응하여 수산화석회가 생성하게 된다. 수산화석회는 물에서 녹아 강 알카리성을 띠게 된다. 따라서 폐콘크리트, 폐벽돌, 폐부럭 등을 분쇄한 순환골재는 위의 반응식에 따라 수산화석회가 있고, 순환골재는 물과 수산화석회로 인하여 강 알카리성을 띠게 되는 것이다. 강 알카리성 물에 의해 수질오염을 일으키게 된다.Looking at [Scheme 1] and [Scheme 2] lime hydroxide is produced by reacting with water. Lime hydroxide dissolves in water and is strongly alkaline. Therefore, the recycled aggregates pulverized waste concrete, waste bricks, waste blocks, etc. have lime hydroxide according to the above reaction formula, and the recycled aggregates are strongly alkaline due to water and lime hydroxide. Water pollution is caused by strong alkaline water.
순환골재에 함유하고 있는 수산화석회를 물에 녹지 않는 화합물로 변환시키게 되면 강 알카리성을 띠지 않게 되고 수질오염을 시키지 않게 될 수 있다.The conversion of lime hydroxide in circulating aggregates into a compound that is insoluble in water may not be strongly alkaline and may not cause water pollution.
본 발명은 순환골재에 함유하고 있는 수산화석회를 사전에 물에 녹지 않는 화합물로 변환시키면 강 알카리성을 띠는 침출수를 없앨 수 있다.The present invention can eliminate the strong alkaline leachate by converting the lime hydroxide contained in the circulating aggregate into a compound that is not dissolved in water in advance.
석회화합물 중에 물에 녹지 않는 화합물 중에는 황산석회와 탄산석회가 있는데, 수산화석회를 황산석회로 변환시키기 위해서는 황산과 반응함으로서 황산석회와 물이 생성되게 된다. 이에 대한 반응식은 [반응식 3] 과 같다.Among the compounds which are insoluble in water, lime sulfate and lime carbonate are used. To convert lime hydroxide into lime sulfate, lime sulfate and water are formed by reacting with sulfuric acid. The reaction scheme is the same as [Scheme 3].
[반응식 3]Scheme 3
Ca(OH)2 + H2SO4 → CaSO4 + 2H2OCa (OH) 2 + H 2 SO 4 → CaSO 4 + 2H 2 O
또한, 수산화석회를 탄산석회로 변환시키기 위해서는, 탄산수와 반응함으로서 탄산석회와 물이 생성되게 된다. 이에 대한 반응식은 [반응식 4] 과 같다.In addition, in order to convert lime hydroxide into lime carbonate, it reacts with the carbonated water to produce lime carbonate and water. The reaction scheme is the same as [Scheme 4].
[반응식 4]Scheme 4
Ca(OH)2 + H2CO3 → CaCO3 + 2H2OCa (OH) 2 + H 2 CO 3 → CaCO 3 + 2H 2 O
본 발명은 순환골재의 반응 할 수 있는 표면적에 황산용액이 완전히 접촉할 수 있도록 하기 위하여 농황산으로 제조된 1～20중량％의 묽은 황산용액으로 하는 것이 좋다.In the present invention, in order to allow the sulfuric acid solution to completely contact the surface area capable of reacting with the circulating aggregate, it is preferable to use 1 to 20% by weight of dilute sulfuric acid solution prepared with concentrated sulfuric acid.
본 발명은 중금속이 함유하지 않은 폐 황산을 사용함으로서 처리비용을 상당히 절감할 수 있다.The present invention can considerably reduce the treatment cost by using waste sulfuric acid that does not contain heavy metals.
또한, 본 발명은 탄산수를 제조하는 방법에 있어서, 가연성 폐기물을 소각하여 발생되는 탄산가스를 사용함으로서 처리비용을 상당히 절감할 수 있다.In addition, the present invention can significantly reduce the treatment cost by using carbon dioxide gas generated by incineration of combustible waste in the method of producing carbonated water.
순환골재에 함유하고 있는 수산화석회를 황산석회나 탄산석회로 변환시키므로서 순환골재에서 발생되는 강 알카리성 침출수를 없애서 안전한 순환골재의 재활용 이용을 원활히 할 수 있어 환경을 보존할 수가 있다.By converting the lime hydroxide contained in the recycled aggregate into lime sulfate or carbonate, the strong alkaline leachate generated from the recycled aggregate can be eliminated, so that the safe use of recycled recycled aggregate can be facilitated and the environment can be preserved.
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| KR101674161B1 (en) | 2016-02-17 | 2016-11-09 | 중앙아스콘(주) | A method for producing ready-mixed concrete with reduced alkali-aggregate reaction |
| KR20210120328A (en) * | 2020-03-26 | 2021-10-07 | 이원희 | Apparatus of manufacturing recycled aggregates derived from construction waste |
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| KR101046557B1 (en) * | 2011-03-15 | 2011-07-05 | (유)코리아레미콘 | Eco-friendly composition of red-mixed concrete using water containing anion |
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| JPH1121156A (en) | 1997-06-30 | 1999-01-26 | Chichibu Onoda Cement Corp | Production of regenerated aggregate |
| KR100527832B1 (en) * | 2005-05-31 | 2005-11-15 | 주식회사 그린환경 | A lime element clearing method of revival aggregate make use of carbonic acid gas and that equpment |
| KR20070024193A (en) * | 2005-08-26 | 2007-03-02 | 주식회사 그린환경 | A lime element clearing method of revival aggregate make use of liquefaction carbonic acid gas and that equipment and produced revival aggregate |
| KR100756852B1 (en) * | 2006-11-16 | 2007-09-07 | 공주대학교 산학협력단 | Method for manufacturing of recycling aggregate |
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| JPH1121156A (en) | 1997-06-30 | 1999-01-26 | Chichibu Onoda Cement Corp | Production of regenerated aggregate |
| KR100527832B1 (en) * | 2005-05-31 | 2005-11-15 | 주식회사 그린환경 | A lime element clearing method of revival aggregate make use of carbonic acid gas and that equpment |
| KR20070024193A (en) * | 2005-08-26 | 2007-03-02 | 주식회사 그린환경 | A lime element clearing method of revival aggregate make use of liquefaction carbonic acid gas and that equipment and produced revival aggregate |
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| KR101674161B1 (en) | 2016-02-17 | 2016-11-09 | 중앙아스콘(주) | A method for producing ready-mixed concrete with reduced alkali-aggregate reaction |
| 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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