A novel chemical quantitative analysis method to determine the content of amorphous silica
Mullite, amorphous silica and ferruginous spheres are contained in high-alumina fly ash (HAFA) which is generated from coal-fired power in Inner Mongolia, China Nowadays, many research works focus on the extraction of alumina and preparation of Al-Si composite, in which the removal of amorphous silica is a necessary treatment.In term of the quantitative analysis of amorphous silica, the quantitative analysis of mild chemical treatment is promoted, which provides an accurate and quantitative analysis for the amorphous silica.In this work, a novel method ”acid and alkali combination” is promoted.The solid and liquid components are examined by the X-ray fluorescence spectrometer and the inductively coupled plasma optical emission spectrometer respectively.The mineral composition and appearance are determined by the X-ray diffractometer and scanning electronic microscope respectively.The results indicate that the ratio between amorphous silica and the whole silica ranges from 57%-58%.The XRD pattern shows that the peak of amorphous silica has disappeared, at the same time, SEM indicates that the mullite enwrapped by the amorphous silica is exposed and the amorphous phase has been removed.
high-alumina fly ash desilication acid treatment amorphous silica quantitative analysis
Jianbo Zhang Zhanbing Li Shaopeng Li Xinjuan Hou Huiquan Li
Key Laboratory of Green Process and Engineering,National Engineering Laboratory for Hydrometallurgic University of Chinese Academy of Science,Beijing 100049,China Key Laboratory of Green Process and Engineering,National Engineering Laboratory for Hydrometallurgic
国内会议
山西朔州
英文
188-192
2015-09-01（万方平台首次上网日期，不代表论文的发表时间）