자원리싸이클링 (Resources Recycling)

  • 제30권1호
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  • Pages.77-82
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  • 2021
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  • 2765-3439(pISSN)
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  • 2765-3447(eISSN)
한국자원리싸이클링학회 (The Korean Institute of Resources Recycling)
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커피박을 활용한 탄재 혼합 조건에 따른 용강 내 탄소의 농도 및 용해 효율 측정

Measurement of Carbon Concentration and Dissolution Ratio in Molten Steel by the Mixing Conditions of Carbon Materials Using Coffee Grounds

  • 김규완 (조선대학교 첨단소재공학과) ;
  • 류근용 (조선대학교 첨단소재공학과) ;
  • 김선중 (조선대학교 재료공학과)
  • Kim, Gyu-Wan (Dep. of Advanced Materials Engineering, Chosun University) ;
  • Ryu, Geun-Yong (Dep. of Advanced Materials Engineering, Chosun University) ;
  • Kim, Sun-Joong (Dep. of Materials Engineering & Science, Chosun University)
  • 투고 : 2021.01.12
  • 심사 : 2021.02.18
  • 발행 : 2021.02.28
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초록

철강 산업에 있어서 CO2 배출량 감소는 중요한 이슈이며, CO2 배출 감소를 위해 코크스를 일부 대체할 수 있는 탄재 연료의 연구는 필요하다. 한편, 바이오매스 연료는 고정 탄소를 일부 함유하고 있으며, 반탄화 공정을 통해 연료내 탄소의 함량을 증가시킬 수 있다. 바이오매스 연료 중 커피박은 약 55 mass%의 탄소를 함유하고 있으며, 국내에서 연간 약 27만 ton이 매립 또는 소각되고 있다. 또한, 연간 커피 소비량의 증가로 인한 재활용 공정에 관한 연구가 필요하다. 본 연구에서는 반탄화 공정을 통한 커피박 내 고정 탄소의 농도에 미치는 온도의 영향을 연구하였다. 또한, 반탄화 커피박의 용해 실험을 통해 금속 샘플 내 탄소 농도와 용해 효율에 대한 코크스와 혼합비의 영향을 조사하였다.

Reduction of CO2 emissions is an important issue in the steel industry, and the research on carbon materials that can partially replace cokes is necessary to reduce CO2 emissions. Meanwhile, the biomass fuel contains some fixed carbon, and the carbon content in the biomass can be increased by torrefaction. As one of the biomass fuels, coffee grounds contains about 55 mass% of carbon, and its about 270,000 tons are landfilled and incinerated annually in Korea. In addition, research on the recycling process due to the increase in annual coffee consumption is required. In this study, the effect of temperature on the concentration of fixed carbon in coffee grounds was investigated during torrefaction. Moreover, the effects of mixing ratio of torrefied coffee grounds with cokes on the carbon concentration and dissolution efficiency in the metal sample were investigated.

키워드

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