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Utilization of Scheelite Mine Tailing as Raw Material of Ordinary Portland Cement  

김형석 (한국지질자원연구원 자원활용소재연구부)
정수복 (한국지질자원연구원 자원활용소재연구)
김완태 (한국지질자원연구원 자원활용소재연구)
안지환 (한국지질자원연구원 자원활용소재연구)
채영배 (한국지질자원연구원 자원활용소재연구부)
Publication Information
Resources Recycling / v.13, no.3, 2004 , pp. 19-26 More about this Journal
Abstract
In order to use the mine tailing which was generated in the flotation process of scheelite ore into the raw material of ordinary portland cement, the characteristics of the prepared cement clinker was investigated. Scheelite mine tailing is composed of 68.8% of $SiO_2$, 8.6% of $Al_2$$O_3$, 10.8% of $Fe_2$$O_3$, 5.0% of CaO, respectively. It exists as $\alpha$-quartz, muscovite, clinochlore and has 8.0% of 88 $\mu\textrm{m}$ residue. When LSF, SM, and IM of the raw materials (such as limestone, convertor slag, fly ash, and mine tailing) are 91.0, 2.60, and 1.60, respectively, the burnability index of the raw materials is 50.7, the crystal size of $C_3$S and $\beta$-C$_2$S in the prepared clinker is 15∼35$\mu\textrm{m}$, and about 3.8% of scheelite mine tailing can be used as raw material.
Keywords
mine tailing; scheelite; ordinary portland cement; clinker; burnability index;
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