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http://dx.doi.org/10.14190/JRCR.2021.9.1.20

Effect of Low-grade Limestone on Raw Mill Grinding and Cement Clinker Sintering  

Yoo, Dong-Woo (Department of Materials Science & Engieering, Kunsan National University)
Park, Tae-Gyun (Yeongwol Industial Promotion Agency)
Choi, Sang-Min (Department of Materials Science & Engieering, Kunsan National University)
Lee, Chang-Hyun (Manufacturing Technology, Sampyo Cement)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.9, no.1, 2021 , pp. 20-25 More about this Journal
Abstract
The cement clinker, the main raw material of cement, is manufactured using limestone as the main material. Depending on the quality of limestone, the use of subsidiary materials changes, and has a great influence on the production of cement clinkers. In this study, the effect of CaO content of limestone, a cement clinker material, on Raw Mill grinding and sintering of cement clinker was investigated. The grinding time of the union materials changed in the content of limestone CaO was measured to identify the grinding properties. The raw material combination was cleaned within a range of 1,350-1,500℃. The sintering performance of cement clinker by Burnability index calculation was identified. The lower the grade of limestone, the lower the grinding quality of the raw material combination. The lower the CaO content of limestone, the greater the variation in F-CaO for sintering temperature. The lower the class of limestone, the higher B. I. value was calculated, indicating the lower cement clinker sintering. In addition, the mineral analysis results of cement clinker showed that if the F-CaO value was low due to the increase in sintering temperature, the Belite content decreased and the Alite content increased. In the case of Alite, the ratio of R-type decreased and that of M-type increased as the content of limestone CaO increased.
Keywords
Cement clinker; Low grade limeston; Sintering; Rietveld method;
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Times Cited By KSCI : 1  (Citation Analysis)
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