에틸렌 글리콜법을 이용한 전기로 환원슬래그의 Free CaO 정량 평가에 관한 연구 = Quantitative Evaluation of Free CaO in Electric Arc Furnace Reduction Slag using the Ethylene Glycol Method

다국어 초록 (Multilingual Abstract)

Blast furnace slag has been actively used as a substitute for cement in the construction field with high value-added through resource recycling research. However, most of the slag cannot find a clear recycling purpose. This is because some slags contain unstable materials and are used for road-use asphalt and embankment, which are low value-added materials. Electric arc furnace reduction slag(ERS) has been reported to contain a large amount of unstable free CaO due to deoxidation and component adjustment. In this study, free CaO of ERS which is generated in Korean steelmakers is quantitatively evaluated by using ethylene glycol method. As a result of free CaO quantitative evaluation of ERS, it was confirmed that there is a big difference according to the location of each field. In addition, ERS generally existed in powder form as undifferentiated characteristics, but it was confirmed that free CaO content was different due to hydration product in aggregate form due to water treatment. In addition, free CaO is an amorphous material and its crystallization characteristics are different due to the influence of temperature when it is cooled. ERS requires a long-term aging period as it contains a lot of free CaO.

참고문헌 (Reference)

1 류득현, "전기로산화슬래그 골재를 사용한 콘크리트의 기초 물성에 관한 실험적 연구" 대한건축학회 25 (25): 143-150, 2009

2 최재석, "전기로 환원 슬래그 미분말의 콘크리트용 혼화재적용성에 관한 실험적 연구" 한국산학기술학회 15 (15): 6890-6897, 2014

3 Wang G, "Use of steel slag as a granular material-Volume expansion prediction and usability criteria" 184 (184): 555-560, 2010

4 Qasrawi H, "Use of low CaO unprocessed steel slag in concrete as fine aggregate" 23 (23): 1118-1125, 2009

5 Sturm T, "The use of EAF dust in cement compositesAssessment of environmental impact" 166 (166): 277-283, 2009

6 Kim KH, "The present situation of production and it’s utilization of electronic arc furnace oxidizing slag in Korea and other countries" 19 (19): 51-57, 2007

7 Chalasani D, "The effects of ethylene glycol on a cement based solidification process" 3 (3): 167-173, 1986

8 Faraone N, "Steelmaking slag as aggregate for mortars: effects of particle dimension on compression strength" 77 (77): 1152-1156, 2009

9 Brand AS, "Steel furnace slag aggregate expansion and hardened concrete properties" 60 : 1-9, 2015

10 Salihoglu G, "Steel foundry electric arc furnace dust management: stabilization by using lime and portland cement" 153 (153): 1110-1116, 2008

11 Lee HS, "Quantitative evaluation of free CaO in electric furnace slag using the ethylene glycol method" 131 : 676-681, 2017

12 Kim JM, "Properties of rapidly-cooled steel slag by atomizing process" 19 (19): 39-45, 2007

13 Pereira CF, "Long and short-term performance of a stabilized/solidified electric arc furnace dust" 148 (148): 701-707, 2007

14 Javellana MP, "Extraction of free lime in portland cement and clinker by ethylene glycol" 12 (12): 399-403, 1982

15 Kim JM, "Evaluation for applicability as the inorganic binder with rapid setting property for construction material of LFS produced from various manufacturing process" 7 (7): 70-77, 2012

16 Arribas I, "Electric arc furnace slag and its use in hydraulic concrete" 90 : 68-79, 2015

17 Wang G, "Determination of the expansion force of coarse steel slag aggregate" 24 (24): 1961-1966, 2010

18 Adegoloye G, "Concretes made of EAF slag and AOD slag aggregates from stainless steel process: Mechanical properties and durability" 76 : 313-321, 2015

19 Correia SL, "Assessment of the recycling potential of fresh concrete waste using a factorial design of experiments" 29 (29): 2886-2891, 2009

20 Rastovcan-Mioc A, "Application of electric arc furnace slag" Croatian Society for Materials and Tribology 436-444, 2009