Burnability and Mineral Properties of Clinker Added Chlorine

Tae-Yeon Kim; Nam-Il Kim; Yong-Sik Chu

doi:10.7844/kirr.2020.29.6.48

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2020 Vol.29, Issue 6 Preview Page Next Page

Research Paper

Burnability and Mineral Properties of Clinker Added Chlorine 염소 함유 클링커의 소성성 및 광물특성에 관한 연구

31 December 2020. pp. 48-56

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Abstract

In this study, raw mix was mixed with CaCl₂ for analyzing characteristics of clinker added chlorine and chlorine was added by 2,000ppm at high concentration condition. The raw mix added chlorine was burned at 1250℃~1350℃ and maintained during 10minutes at each maximum temperature. Clinker target modulus was LSF 92, SM 2.5 and IM 1.6 in this study. The burnability of clinker added chlorine was identified by free-CaO content. Free-CaO content decreased as chlorine content increased and free-CaO content of 1350℃-2000ppm clinker decreased by 1.5%. Optical microscope and XRD Analyses were used for identify mineral properties of clinker added chlorine. The mineral of clinker could not be observed at 1250℃ and the size of alite grew larger as chlorine content increased at 1350°C. It showed a good crystallizability as chlorine content increased. As chlorine content of clinker increased, clinker showed a good burnability and mineral property.

Keywords

Chlorine

Clinker

burnability

Calcium Chloride

Alite

본 연구에서는 염소 함유 클링커 특성을 분석하기 위해 raw mix 제조 시 CaCl₂를 첨가하였으며, 이때 염소 함량을 고농도 조건인 2,000ppm까지 제어하였다. 염소 첨가 raw mix의 소성온도는 1250℃에서 1350℃까지 조정하였으며, 각각의 최대온도에서 10분간 유지하였다. 모듈러스는 LSF-92.0, SM-2.5 및 IM-1.6으로 고정하였으며, 염소 함유 클링커의 소성성은 free-CaO 분석을 통해 확인하였다. 염소 함량 증가에 따라 free-CaO는 감소하였으며, 1350℃-2000ppm의 free-CaO 함량은 1.5%까지 낮아졌다. 염소 함량 증가에 따른 광물특성 확인을 위해 광학현미경 및 XRD를 활용하였다. 1250℃ 소성 시에는 클링커 광물을 관찰할 수 없었으며, 1350℃ 소성 시에는 염소 함량 증가에 따라 alite 크기가 소폭 증가하였다. 또한 염소 함량 증가에 따라 우수한 광물결정성을 발현되어 클링커 내 염소함량이 증가할수록 우수한 소성성 및 광물특성을 보였다.

키워드

염소

클링커

소성성

염화칼슘

알라이트

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Journal of the Korean Institute of Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 29
No :6
Pages :48-56
Received Date : 2020-10-26
Revised Date : 2020-11-19
Accepted Date : 2020-11-26
DOI :https://doi.org/10.7844/kirr.2020.29.6.48

Resources RecyclingISSN:2765-3439(Print) 2765-3447(Online)한국자원리싸이클링학회

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