WANG Ling1,2, ZHANG Ke1, LI Ping1, YIN De-qiang1, FAN Bo-wen1, TANG Xiao-Gang1
(1. College of Materials and Chemistry and Chemical Engineering, Cheng du University of Technology, Chengdu610059, China;
2. Key Laboratory of Diamond Film, Chengdu University of Technology, Chengdu 610059, China)
Abstract: In order to provide scientific evidence for in-depth evaluation of the quartzose sandstone of Huangdan, Muchuan County and high-end application in the quartz sand with lower iron, the iron reservoir state in the ore was studied with a variety of mineral test and analysis methods including X-ray fluorescence spectrometry analysis (XRF), X-ray powderdiffraction analysis (XRD), scanning electron microscope (SEM) and X-ray energy dispersive analysis (EDS). The results show that the content of Fe2O3 in raw ore is about 0.161%, and the changing range is 0.086%–0.272%. The content of Fe2O3 in the ore is negative correlated with the content of SiO2 and particle size, and positive correlated with the content of SO3, Al2O3 and K2O. The content of quartz whose particle size is in the range of 0.2–0.5 mm is higher than 90% and there is no isomorph in the quartz crystal structure. But there are some of pockets whose particle size is 1–100 μm on the quartz’s surface. The bigger pockets are filled by illite clay minerals. The clay minerals and black impurities whose basis is pyrite are the main carrier for Fe2O3. And their contents are about 8% and 1%, respectively. Their contribution values of Fe2O3 are about 0.076% and 0.085% (pyrite is about 0.050%), respectively.
Key words: quartz; quartzose sandstone; clay mineral; pyrite; process mineralogy
E-mail: wangling@cdut.edu.cn
ACTA MINERALOGICA SINICA Vol. 32, No. 2, 2012, Page 183-192
