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论文类型：期刊论文
发表时间：2009-01-01
发表刊物：OIL SHALE
收录刊物：SCIE、Scopus
卷号：26
期号：2
页面范围：163-168
ISSN号：0208-189X
摘要：This work adopted 1,10-phenanthroline spectrophotometric method, complexo-metric titration and X-ray diffractometer (XRD) to investigate active state of aluminum and iron impurities in semicoke of Huadian oil shale which was calcinated at different temperatures and the influence of calcination temperature on leaching rate of impurities (Al, Fe) with acid. The results show that after calcination of semicoke of Huadian oil shale at 700-800 degrees C, iron and aluminium exist in their maximum active state and turn into materials soluble in acids, which results in their maximum leaching rate. This process is important for the removal of impurities at preparation of high-quality amorphous silica from oil shale ash.