KR100301277B1 - A method of producing filler using electric arc furnace dust fly ash and bottom ash and ascon containing the same - Google Patents
A method of producing filler using electric arc furnace dust fly ash and bottom ash and ascon containing the same Download PDFInfo
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- KR100301277B1 KR100301277B1 KR1020000009002A KR20000009002A KR100301277B1 KR 100301277 B1 KR100301277 B1 KR 100301277B1 KR 1020000009002 A KR1020000009002 A KR 1020000009002A KR 20000009002 A KR20000009002 A KR 20000009002A KR 100301277 B1 KR100301277 B1 KR 100301277B1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
- H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
- H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
- H05B41/232—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
- H05B41/233—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps using resonance circuitry
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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
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Abstract
각종 폐기물을 소각하는 과정에서 발생되는 소각회(Fly Ash, Bottom Ash)와 제철 또는 제강공정에서 부산물로 생성되는 전기로 제강더스트(Electric Arc Furnace Dust)를 혼합하여 역청포장용 채움재(Filler)로 제조하는 방법과 이를 이용하여 아스팔트 콘크리트(아스콘)을 제조하는 방법에 관한 것이다.Fly ash, bottom ash generated from the incineration of various wastes and electric arc furnace dust produced as a by-product from the steelmaking or steelmaking process are mixed into bitumen packing materials. It relates to a method and a method for producing asphalt concrete (ascon) using the same.
본 발명은 소각회와 제철 또는 제강더스트를 중량기준으로 일정비율 예를들면 6:4-8:2 의 비율로 혼합, 제조하여 역청 포장용 채움재 규격(KS F 3501)에 적합하도록 가공, 제조하는 방법; 및The present invention is a method of mixing and manufacturing incineration ash and steel or steel dust in a certain ratio, such as 6: 4-8: 2 ratio by weight, processed and manufactured to meet the bitumen packing material specification (KS F 3501). ; And
골재(돌, 모래, 쇄석)를 입도별로 가열로 투입 130-170℃ 온도로 가열하고 이를 핫빈에서 체별로 분리한 다음 상기 제조된 역청 포장용 채움재(Filler)와 140-160℃ 로 히팅된 아스팔트(AP)를 혼합기에 투입 배합하여 아스콘을 제조하는 방법을 제공한다.Aggregate (stone, sand, crushed stone) is added to the furnace by particle size, heated to 130-170 ℃ and separated by a sieve from a hot bean, and then the bitumen packing filler and asphalt heated to 140-160 ℃ ) Into a mixer to provide a method for producing ascone.
본 발명은 소각회와 전기로 제강더스트의 2종류의 산업폐기물간에 호완(보완)성을 갖도록 한 다음 유용하게 재활용하여 아스콘의 품질을 향상시킴은 물론 폐자원을 재활용을 함으로써 일석이조의 효과를 얻는 것이다.The present invention is to improve the quality of the asphalt concrete as well as to improve the quality of ascon as well as to improve the compatibility between the two types of industrial waste of incineration ash and electric steelmaking dust, and to obtain the effect of two stone two .
Description
본 발명은 아스콘 채움재 및 이를 포함한 아스콘 제조방법에 관한 것이며, 보다 상세히는 제철 및 제강공정에서 발생되는 더스트, 특히 고철을 원료로 하여 철강을 생산하는 과정에서 부산물로 발생되는 산업폐기물인 전기로 더스트(Electric Arc Furnace Dust) 및 소각장등에서 발생되는 소각재(Fly Ash, Bottom Ash)를 이용하여 아스콘의 채움재를 제조하는 방법 및 이를 포함한 아스콘 제조방법에 관한 것이다.일반적으로 소각장에서 발생되는 소각회(Fly Ash, Bottom Ash)는 그 발생원에 따라 그 성분 및 물리·화학적성질이 다양하지만 일반적으로 비중은 2.0-2.2 범위이고 회백색의 것이 많으며 대부분 구모양으로 되어있다.성분은 실리카(SiO2), 산화칼슘(CaO), 산화알루미늄(Al2O3), 산화철(Fe2O3)의 순으로 조성되어 있고 실리카가 전체의 50% 이상 차지하고 있다.또한, 제강더스트는 고철을 원료로 하여 철을 재생시키는 제강공정에서 폐기물로 발생되는데 용광로나 전기로 연도의 정전집진과정중 집진기에 포집되어 수집되며, 다량의 산화철(Fe2O3), 산화아연(ZnO), 실리카(SiO2), 산화칼슘(CaO) 및 약간의 유황성분 뿐만 아니라 납(Pb), 카드뮴(Cd), 크롬(Cr), 구리(Cu) 같은 성분들이 포함되어 있다.The present invention relates to an ascon filling material and an ascon manufacturing method including the same, and more specifically, dust generated in a steelmaking and steelmaking process, in particular, electric furnace dust, which is an industrial waste generated as a by-product in the process of producing steel using as raw materials of scrap iron ( The present invention relates to a method of manufacturing ascon filling material using electric arc furnace dust and incinerators (Fly Ash, Bottom Ash) and an ascon manufacturing method including the same. Bottom Ash) varies in composition and physical and chemical properties depending on its source, but its specific gravity is generally in the range of 2.0-2.2, grayish white and mostly spherical.The components are silica (SiO 2 ) and calcium oxide (CaO). ), Aluminum oxide (Al 2 O 3 ), and iron oxide (Fe 2 O 3 ) in that order, and silica accounts for 50% or more of the total. Steelmaking dust is generated as waste in the steelmaking process of regenerating iron from scrap metal, and it is collected and collected in dust collector during the electrostatic dust collection process of furnace or electric furnace, and a large amount of iron oxide (Fe 2 O 3 ) and zinc oxide (ZnO) are collected. ), Such as lead (Pb), cadmium (Cd), chromium (Cr) and copper (Cu), as well as silica (SiO 2 ), calcium oxide (CaO) and some sulfur.
또한, 상기 제철 및 제강공정에서 발생되는 더스트 이외에도 소각장등에서 발생되고 그 발생원에 따라 그 성분 및 물리·화학적 성질이 다양한 폐기물인 소각재(비산회)(fly ash, bottom ash)는 발생량이 매년 증가되고 있으며, 시멘트 부원료, 재생골재 및 각종 건자재의 부원료로 일부 사용하고 일부 재활용하고 있기는 하나 발생량의 대부분은 여전히 매립처리 됨으로서, 공해 문제 뿐만아니라 매립지 확보 및 매립처리에 따른 비용상승등 여러가지 문제점을 갖고 있다.상기와 같은 문제점을 해결하기 위해 선행기술인 한국특허 제 46478 호 및 제 109373 호에 제철제강공정에서 부산물로 생성되는 더스트를 아스팔트(AP-3)등과 혼합, 고형화 및 안정화시켜 아스콘을 제조함으로써 산업폐기물인 더스트를 활용하는 방법이 개시되어 있다. 그러나, 상기 선행기술에서는 제반문제점을 해결하지 못했다. 따라서, 본원발명은 본원의 기술적 구성에 의해 상기 문제점들을 해결함과 동시에 물리,화학적 성질이 우수한 아스콘을 제조하는 방법을 제공하는데 있다.In addition, in addition to the dust generated in the steelmaking and steelmaking process, the amount of incineration ash (fly ash, bottom ash), which is generated from incinerators, etc., and whose constituents and physical and chemical properties vary depending on the generation source, is increasing every year. Although it is partially used and partially recycled as a subsidiary material of cement raw materials, recycled aggregates and various construction materials, most of the generated amount is still landfilled, and thus there are various problems such as pollution problems as well as the cost of landfills and landfills. In order to solve the problems such as the prior art Korean Patent Nos. 46478 and 109373, dust produced as a by-product in the steelmaking process is mixed with asphalt (AP-3), solidified and stabilized to produce ascon to make industrial waste dust. A method of utilizing is disclosed. However, the prior art did not solve all the problems. Accordingly, the present invention is to solve the above problems by the technical configuration of the present application and to provide a method for producing ascon excellent in physical and chemical properties.
이에 본 발명의 목적은 보다 효율적이며 친환경적인 전기로·제강 더스트 및 소각재 처리방법을 제공하는데 있다.Accordingly, an object of the present invention is to provide a more efficient and environmentally friendly furnace, steelmaking dust and incineration material treatment method.
본 발명의 다른 목적은 전기로·제강 더스트 및 소각재를 이용하여 아스콘 제조용 채움재를 제조하는 방법을 제공하는 데 있다.Another object of the present invention to provide a method for producing a filling material for ascon production using an electric furnace, steelmaking dust and incineration.
본 발명의 또 다른 목적은 전기로·제강 더스트 및 소각재를 이용하여 종래보다 물리·화학적 성질이 우수한 아스콘을 제조하는 방법을 제공하는데 있다.It is still another object of the present invention to provide a method for producing ascon superior in physical and chemical properties using an electric furnace, steelmaking dust and incineration ash.
도 1은 본 발명에 의한 방법에 따라 아스콘용 충진재를 제조하는 공정개략도이다.도 2는 본 발명의 발명에 따라 아스콘을 제조하는 공정개략도이다.1 is a process schematic diagram for preparing ascone fillers according to the method of the present invention. FIG. 2 is a process schematic diagram for preparing ascones according to the invention.
본 발명의 일 측면에 의하면,전기로·제강더스트와 소각회를 각각 밀폐배관으로 운송 및 저장하는 단계; 및According to an aspect of the invention, the step of transporting and storing the electric furnace, steelmaking dust and incineration ash in a closed pipe respectively; And
상기 저장된 전기로·제강더스트와 소각재를 중량기준으로 6:4-8:2의 비율로 혼합하는 단계; 를 포함하는 역청포장용 채움재 제조방법이 제공된다.Mixing the stored electric furnace, steelmaking dust, and incinerator at a ratio of 6: 4-8: 2 by weight; Provided is a method for preparing a bituminous packaging material comprising a.
본 발명의 다른 측면에 의하면,According to another aspect of the present invention,
가열로에 돌, 쇄석 및 모래등으로 이루어진 골재를 투입하고 130-170℃온도가 되게 가열하는 단계;Injecting aggregate consisting of stone, crushed stone and sand into a heating furnace and heating it to a temperature of 130-170 ° C .;
상기 가열된 골재를 핫 빈(Hot Bin)에서 크기별로 분리하는 단계;Separating the heated aggregates by size in a hot bin;
아스팔트를 140-160℃온도로 가열하는 단계; 및Heating the asphalt to a temperature of 140-160 ° C .; And
상기 가열된 골재, 상기 제1항에서 제조된 채움재 및 상기 가열된 아스팔트를 혼합기에 투입하여 교반하는 단계;Stirring the heated aggregate, the filler prepared in claim 1 and the heated asphalt into a mixer;
를 포함하는 아스콘 제조방법이 제공된다.Provided is a method for producing ascon containing.
이하 본 발명에 대하여 상세히 설명한다.Hereinafter, the present invention will be described in detail.
도 1은 본 발명의 방법에 따라 아스콘 제조용 채움재를 제조하는 공정개략도이다.1 is a process schematic diagram of manufacturing a filling material for ascon production according to the method of the present invention.
본 발명의 충진재 제조방법에서는 먼저 전기로·제강 다스트와 소각재를 혼합하는 바, 그 혼합비는 요구되는 충진재의 물리적 및 화학적 성질에 따라 달라지나 전기로·제강더스트 : 소각재의 중량비를 6:4∼8:2의 비율로 혼합사용하는 것이 좋으며, 보다 바람직한 혼합비는 7:3이다.In the manufacturing method of the filling material of the present invention, first, the furnace and steelmaking dust and incineration materials are mixed, and the mixing ratio varies depending on the required physical and chemical properties of the filling material, but the weight ratio of the electric furnace and steelmaking dust and incineration materials is 6: 4 to 4. It is better to mix and use at the ratio of 8: 2, and more preferable mixing ratio is 7: 3.
상기 혼합물은 분리체별로 입도를 조정하게 되는바, 이때 입도는 예를들어 0.6mm체에 대한 통과중량 백분율을 95%이상, 0.15mm체에 대한 통과중량 백분율은 90%이상, 0.075mm체에 대한 통과중량 백분율을 70%이상되게 할수 있다.The mixture is to adjust the particle size for each separation, wherein the particle size is, for example, the pass weight percentage for the 0.6mm sieve more than 95%, the passthrough weight percentage for the 0.15mm sieve more than 90%, for 0.075mm sieve It is possible to make the pass weight percentage more than 70%.
상기 예시적으로 입도조정된 혼합분쇄물은 한국공업규격 KSF 3501 규격에 적합하여 향후 아스콘의 충진재로 사용될 수 있다.The exemplary mixed particle size adjusted powder may be used as a filler for ascon in the future in accordance with the Korean Industrial Standard KSF 3501 standard.
본 발명에 의하면 상기와 같이 제조된 혼합분쇄물을 채움재로 이용하는 아스콘 제조방법이 제공된다.According to the present invention there is provided a method for producing ascon using the mixed powder prepared as described above as a filler.
이 방법은 상기 방법에 따라 채움재를 제조하는 한편, 골재 가열로에 돌, 쇄석, 모래등으로 이루어진 골재를 투입하여 이들의 온도가 130-170℃되게 가열하는 단계를 포함한다. 이때, 상기 가열로는 로내온도가 200℃이상되게 유지되며, 상기 골재크기는 19mm 이하되는 것이 바람직하다.The method includes preparing a filler in accordance with the above method, and injecting aggregates made of stone, crushed stone, sand, etc. into the aggregate heating furnace and heating them to 130-170 ° C. At this time, the furnace temperature is maintained at 200 ℃ or more, the aggregate size is preferably 19mm or less.
상기 가열된 골재는 핫빈(Hot Bin)등에서 크기별로 분리된다.The heated aggregate is separated by size in a hot bin or the like.
한편 아스팔트(AP-3)를 140-160℃로 유지되게 가열하여 아스콘의 일성분으로 준비한다.Meanwhile, asphalt (AP-3) is heated to maintain 140-160 ℃ to prepare as a component of ascone.
상기와 같이 준비된 채움재, 가열골재 및 아스팔트등 아스콘 성분들을 혼합기에 투입하여 균일하게 교반하게 되며, 이때 혼합기에의 투입순서는 골재, 더스트와 소각재의 혼합물로 이루어진 채움재, 및 아스팔트 순서로 투입하는 것이 좋다.Ascon components such as filler, heated aggregate, and asphalt prepared as described above are added to the mixer to be uniformly stirred. In this case, the input order to the mixer is preferably a filler, a mixture of aggregate and dust and incineration ash, and asphalt. .
이같이 제조된 아스콘은 종래의 아스콘에 비하여 밀도, 안정성, 공극률, 포화도 및 후로우등이 아주 우수할 뿐만아니라 특히 아스콘에서 중요시되는 수침후 잔류 안정성과 동적 안정도가 우수할 뿐만아니라 함유된 유해중금속이 용출되지 않아 친환경적인 측면에서도 유용한 것이다.Ascon is not only excellent in density, stability, porosity, saturation and flow compared to conventional ascon, but also excellent in residual stability and dynamic stability after immersion, which is important in ascon, and also does not elute harmful heavy metals. It is also useful in terms of environment.
실시예 1이하, 본 발명을 실시예에 따라 설명한다.전기로·제강공정에서 발생되는 더스트와 소각재를 각각 120g 과 50g 을 채취하여 이를 균일하게 혼합한 후 분쇄하여 0.6mm 체 통과 중량백분율을 100%, 0.3mm 체 통과 중량백분율을 95% 이하, 0.15mm 체 통과백분율을 90% 이하, 그리고 0.075mm 통과중량백분율을 70% 이하로 조정하여 채움재를 제조하였다.상기 제조된 아스콘 채움재에 대하여 시험결과, 수분량, 비중 소성지수, 흐름시험 및 침수팽창에서 아스콘 충진재에서 요구되는 규격을 만족하였으며 가열변질은 발생되지 않았으며 박리는 발견되지 않았다.실시예 2, 3 Example 1 Hereinafter, the present invention will be described according to Examples. 120 g and 50 g of dust and incineration ash generated in an electric furnace and steelmaking process were respectively collected, mixed uniformly, and ground to a weight percentage of 0.6 mm through a sieve. %, 0.3 mm sieve weight percentage of 95% or less, 0.15 mm sieve weight percentage of 90% or less, and 0.075 mm sieve weight percentage of 70% or less were prepared. , Water content, specific gravity plasticity index, flow test, and immersion expansion were satisfied with the specifications required for ascon fillers. No heat deterioration occurred and no peeling was found. Example 2, 3
상기 실시예 1에서 제조된 채움재를 가열로에 투입하여 150℃ 온도로 가열하여 내부에 함유된 미량의 탄소를 제거한 후 회수하였다.The filler prepared in Example 1 was added to a heating furnace and heated to a temperature of 150 ° C. to remove a trace amount of carbon contained therein, and then recovered.
상기 골재가열로에 하기 표 1의 실시예 2 및 3에 나타낸 비율의 돌, 석분 및 모래로 이루어진 골재를 투입하여 130-170℃온도로 가열한 후, 핫빈에서 분리하여 혼합기에 투입하였다.Into the aggregate heating furnace, aggregates made of stones, stone powder, and sand in the ratios shown in Examples 2 and 3 of Table 1 were heated to a temperature of 130-170 ° C., and then separated from a hot bin and added to a mixer.
상기 혼합기에 상기 실시예 1에서 제조된 채움재를 투입하고, 140-160℃로 가열유지되는 아스팔트로 상기 골재 및 충진재에 분사교반하면서 혼합하여 아스콘을 제조하였다.The filler prepared in Example 1 was added to the mixer, and mixed with spray stirring with the aggregate and the filler with asphalt maintained at 140-160 ° C. to prepare ascone.
상기와 같이 제조된 아스콘에 대한 품질을 조사하였으며 (KSF2337에 의한 마샬시험) 그 결과를 하기 표 2에 나타내었다.The quality of the ascon prepared as described above was investigated (Marshall test by KSF2337) and the results are shown in Table 2 below.
상기 표 2에 나타난 바와같이 본 발명에 의해 제조된 아스콘은 종래의 것보다 밀도, 안정성,공극률, 포화도 후로우 등이 KS 기준에서 정한 마샬실험 결과 아주 우수한 것으로 나타났다.As shown in Table 2, the asphalt concrete prepared by the present invention showed that the density, stability, porosity, saturation flow, and the like were superior to those of the conventional Marshall test set by the KS standard.
또한, 아스콘에서 가장 중요시되는 것은 수침 후 잔류 안정도와 동적 안정도(변형율)인데 본 발명에 의해 제조된 아스콘은 종래의 것에 비하여 2배 이상 우수한 것으로 나타나고 있다. 하기 표 3은 폐기물 공정시험 방법에 의한 중금속 용출시험 결과를 나타내고 있는데, 시험결과에 나타난 바와같이 아스콘에 미량 함유되어 있는 중금속이 환경 관계법규에 의한 용출시험결과 용출되지 않음이 확인되어 본 발명에 의해 제조된 아스콘이 공해를 유발하지 않을 뿐아니라 그 품질도 우수한 것을 알 수 있다.In addition, the most important in ascon is the residual stability after immersion and the dynamic stability (strain), the ascon prepared by the present invention has been shown to be more than two times better than the conventional one. Table 3 below shows the heavy metal dissolution test results by the waste process test method. As shown in the test results, it was confirmed that heavy metals contained in trace amounts in the asphalt were not eluted by the dissolution test results according to environmental regulations. It can be seen that the manufactured ascon does not cause pollution and its quality is excellent.
상기한 바와같이 본 발명은 공해의 원인이 되었던 혼합 더스트를 아스콘 제조에 효율적으로 활용하므로서 공해 발생을 줄이는데 큰 의의가 있으며, 아스콘 제조에 있어도 종래 고가의 석회석분(탄산칼슘) 대신 폐기되는 혼합더스트를 활용하여 제조비용을 절감 할 수 있을 뿐만아니라 아스콘 제품의 품질도 종래의 것에 비하여 우수한 것으로 판명되었다.As described above, the present invention has great significance in reducing pollution by efficiently using mixed dust which has been a cause of pollution for ascon production, and in the manufacture of ascon, mixed dust that is discarded instead of expensive limestone powder (calcium carbonate) in the past. In addition to reducing manufacturing costs, the quality of Ascon products was found to be superior to that of the conventional ones.
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| KR1020000009002A KR100301277B1 (en) | 2000-02-24 | 2000-02-24 | A method of producing filler using electric arc furnace dust fly ash and bottom ash and ascon containing the same |
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| KR1020000009002A KR100301277B1 (en) | 2000-02-24 | 2000-02-24 | A method of producing filler using electric arc furnace dust fly ash and bottom ash and ascon containing the same |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000072290A (en) * | 2000-08-19 | 2000-12-05 | 정권수 | A preparation method of Ascon filler used by industrial waste and industrial byproduct |
| KR20000072440A (en) * | 2000-08-25 | 2000-12-05 | 정권수 | The preparation method of Ascon filler used by Slag and Coal ash |
| KR20000072291A (en) * | 2000-08-24 | 2000-12-05 | 정권수 | A preparation method of Ascon filler used by industrial waste |
| KR100352215B1 (en) * | 2000-03-03 | 2002-09-12 | 세연에스앤알 주식회사 | Reprocessing method of industrial wastes |
| KR100387105B1 (en) * | 2000-07-14 | 2003-06-12 | 원하종합건설 주식회사 | Self-Leveling and backfill settlement-free material, manufacturing method thereof and construction method using the same |
| KR20090051657A (en) * | 2007-11-19 | 2009-05-22 | 이종규 | Asphalt concrete packing material using stainless and steel manufacture and fly ash dust and it's manufacturing method |
| KR20160039707A (en) * | 2014-10-01 | 2016-04-12 | 대성엠디아이(주) | System for manufacturing filler including hydrated lime |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100796048B1 (en) * | 2006-12-05 | 2008-01-21 | 한국후라이애쉬시멘트공업(주) | Bottom ash aggregate in asphalt concrete compositions and method of the same |
| CZ2014372A3 (en) * | 2014-05-30 | 2015-06-24 | Silmos S.R.O. | Recovery method of surface coverings, particularly damaged forest and utility roads and ways from penetration macadam |
-
2000
- 2000-02-24 KR KR1020000009002A patent/KR100301277B1/en not_active IP Right Cessation
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100352215B1 (en) * | 2000-03-03 | 2002-09-12 | 세연에스앤알 주식회사 | Reprocessing method of industrial wastes |
| KR100387105B1 (en) * | 2000-07-14 | 2003-06-12 | 원하종합건설 주식회사 | Self-Leveling and backfill settlement-free material, manufacturing method thereof and construction method using the same |
| KR20000072290A (en) * | 2000-08-19 | 2000-12-05 | 정권수 | A preparation method of Ascon filler used by industrial waste and industrial byproduct |
| KR20000072291A (en) * | 2000-08-24 | 2000-12-05 | 정권수 | A preparation method of Ascon filler used by industrial waste |
| KR20000072440A (en) * | 2000-08-25 | 2000-12-05 | 정권수 | The preparation method of Ascon filler used by Slag and Coal ash |
| KR20090051657A (en) * | 2007-11-19 | 2009-05-22 | 이종규 | Asphalt concrete packing material using stainless and steel manufacture and fly ash dust and it's manufacturing method |
| KR20160039707A (en) * | 2014-10-01 | 2016-04-12 | 대성엠디아이(주) | System for manufacturing filler including hydrated lime |
| KR101632282B1 (en) * | 2014-10-01 | 2016-06-22 | 대성엠디아이(주) | System for manufacturing filler including hydrated lime |
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| Publication number | Publication date |
|---|---|
| KR20000036361A (en) | 2000-07-05 |
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