화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Chemical Engineering Research, Vol.55, No.2, 141-155, April, 2017
DOI10.9713/kcer.2017.55.2.141  Export Citation
제철 슬래그를 이용한 광물 탄산화 기술의 개발 현황과 연구 방향
Development Status and Research Direction in the Mineral Carbonation Technology Using Steel Slag
손민아, 김국희, 한건우†, 이민우1, 임준택2
  • 포항산업과학연구원 기후에너지연구그룹, 37673 경상북도 포항시 남구 청암로 67
  • 1계명대학교 화학공학과, 42601 대구광역시 달서구 달구벌대로 1095
  • 2포스코 신사업실, 06194 서울특별시 강남구 테헤란로 440
Minah Son, Gookhee Kim, Kunwoo Han†, Min Woo Lee1, and Jun Taek Lim2
  • Climate and Energy Research Group, Research Institute of industrial Science & Technology, 67, Cheongam-ro, Nam-gu, Pohang-si, Gyeongbuk, 36763, Korea
  • 1Department of Chemical Engineering, Keimyung University, 1095, Dalgubeol-daero, Dalseo-gu, Daegu, 42601, Korea
  • 2New Business Department, POSCO Center, 440, Teheran-ro, Gangnam-gu, Seoul, 06194, Korea
E-mail:
초록
이 논문에서는 CO2 활용 기술 관점에서 광물 탄산화 기술의 하나인 제철 슬래그를 이용한 침강성 탄산칼슘(Precipitated Calcium Carbonate, PCC) 제조 기술의 개발 현황을 고찰하였다. 광물 탄산화 기술의 원리, 특징, 전세계적 개발 현향을 살펴보았고, PCC 제조기술 및 시장동향도 파악하였다. 광물 탄산화는 안정적이고 친환경적인 기술로, 산업 부산물의 경제적 처리를 가능하게 한다. 일반적으로 슬래그중 Ca 용출 및 고액 분리 과정후 상등액과 CO2의 반응을 통해 탄산칼슘을 제조한다. 이 기술은 파일럿 단계까지 기술개발이 진행되었으며(알토대학교의 Slag2PCC), 상용화를 위해서는 경제성 증대가 필요할 것으로 판단된다. 개발을 위한 핵심 기술로는 슬래그로부터 Ca의 효과적 용출 및 불순물 제거, 탄산칼슘의 입도 및 입형 제어를 통한 고부가가치화, 잔사 슬래그의 활용방안 발굴, 연속공정 구현을 위한 반응 조건 최적화 등을 들 수 있다.
In the present paper, we investigated the development status of precipitated calcium carbonate (PCC) production using steel slag, which is one of mineral carbonation (MC) technologies, from the standpoint of CO2 utilization. Principle, feature, and global and domestic development status of the mineral carbonation technology were discussed together with the overview of the production method and market of PCC. Mineral carbonation is known as stable and environmentally-friendly technology enabling economical treatment of industrials wastes. Typically, PCC is produced by the reaction of CO2 with supernatant solution after Ca extraction from steel slag followed by the separation of solid and liquid. The development status of MC using steel slag is at the pilot stage (Slag2PCC at Aalto University), and there remains the process economics improvement for commercialization. Key technologies for the further development are efficient extraction of Ca ions from steel slag including impurities removal, valorization of PCC via shape and size control, usage development and value-addition of residual slag, and optimization of reaction conditions for continuous process setup, etc.
Keywords:CO2 utilization;Steel slag;Mineral carbonation;Ca extraction;PCC (Precipitated Calcium Carbonate)
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