Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Effects of IM and Chlorine Contents on Cement Clinker

시멘트 클링커 특성에 미치는 IM과 염소 함량의 영향 분석

  • Young Jun Lee (Carbon Neutrality Materials Center, Korea Institute of Ceramic Eng. & Tech.) ;
  • Woo Sung Yum (Carbon Neutrality Materials Center, Korea Institute of Ceramic Eng. & Tech.) ;
  • Sung Kwan Seo (Carbon Neutrality Materials Center, Korea Institute of Ceramic Eng. & Tech.) ;
  • Yong Sik Chu (Carbon Neutrality Materials Center, Korea Institute of Ceramic Eng. & Tech.)
  • 이영준 (한국세라믹기술원 탄소중립소재센터) ;
  • 염우성 (한국세라믹기술원 탄소중립소재센터) ;
  • 서성관 (한국세라믹기술원 탄소중립소재센터) ;
  • 추용식 (한국세라믹기술원 탄소중립소재센터)
  • Received : 2023.10.16
  • Accepted : 2023.10.23
  • Published : 2023.10.31
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Abstract

The cement industry uses various industrial by-products as raw materials and fuel for cement clinker. Most of industrial by-products with chlorine can affect clinker properties. In this study, the mineralogical properties of clinker as chlorine content, especially alite and belite mineral properties and burnability were examined. The burnability of clinker was better as the chlorine content increased and the best results were obtained at clinker with 2,000ppm chlorine. Free-CaO content decreased by about 37% at 2,000ppm compared to 0ppm chlorine. Alite size increased slightly as the chlorine content increased, and became smaller as IM increased. XRD peak intensity of alite increased up to 1,000ppm chlorine content under IM 1.5 and 1.7 conditions, but slightly decreased at 2,000ppm. But alite peak intensity at 2,000ppm was higher than that of 0ppm. From the above results, it was confirmed that IM and chlorine content can change the clinker mineral size and also change the XRD peak intensity.

시멘트 산업은 다양한 산업부산물을 시멘트 클링커용 원료 및 연료로 사용하고 있다. 이들 산업부산물은 대부분 염소를 함유하여 클링커 물성에 다양한 영향을 줄 수 있다. 따라서 본 연구에서는 염소 함량을 제어한 클링커의 광물학적 특성, 특히 알라이트 및 벨라이트 광물 특성과 소성성을 검토하였다. 클링커의 소성성은 IM 변화와 무관하게 염소 함량 증가에 따라 좀 더 양호했으며, 특히 염소 함량 2,000ppm 조건에서 가장 양호한 결과가 도출되었다. 이때 Free-CaO 함량은 염소 함량 0ppm 대비 2,000ppm에서 약 37% 감소한 수준이었다. 알라이트 결정 크기는 염소 함량 증가에 따라 소폭 증가하였으며, IM 증가에 따라서는 작아지는 결과가 도출되었다. 알라이트의 XRD 피크 강도는 IM 1.5 및 1.7 조건에서 염소 함량 1,000ppm까지 증가하나, 2,000ppm에서는 소폭 감소하였다. 하지만 염소 함량 2,000ppm에서도 알라이트 피크 강도는 0ppm 보다 높은 값을 나타내었다. 상기의 결과로부터 IM과 염소 함량은 클링커 광물 크기를 변화시킬 수 있으며, 또한 XRD 피크 강도도 변화시킬 수 있다는 것을 확인하였다.

Keywords

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