Study on Technological Mineralogy of Rare Earth Tailings from Bayan Obo

doi:10.12068/j.issn.1005-3026.2017.08.010

Abstract

Abstract: The chemical composition， mineral composition and dissemination characteristics of rare earth tailings from Bayan Obo were investigated by the means of X-ray diffraction， scanning electron microscopy， mineral liberation analyzer， electron probe microanalysis and chemical analysis. The results show that the tailings have complex compositions and fine disseminated size. In the tailings， the rare earth minerals contain bastnaesite and monazite， while iron mainly exists in the form of hematite and fluorine is in the fluorite. The liberation degrees of rare earth minerals， hematite and fluorite are 87.28%，89.15% and 96.70%， respectively. Niobium occurs in the niobium minerals， such as pyrochlore， niobite， teshirogilite， ilmenorutile and etc. Scandium distributes in the silicate minerals and thorium occurs in the rare earth minerals in isomorphism. The results may provide the evidence for the efficient and comprehensive utilization of the rare earth tailing from Bayan Obo.

Key words: tailings utilization, mineral liberation, Bayan Obo, rare earth tailing, mineralogical process

CLC Number:

TD912

ZHENG Qiang， BIAN Xue， WU Wen-yuan. Study on Technological Mineralogy of Rare Earth Tailings from Bayan Obo[J]. Journal of Northeastern University Natural Science, 2017, 38(8): 1107-1111.

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