Rare earths are lanthanides in the periodic table of chemical elements - La, Ce, Pr, Nd, Pm, Sm, Eu, Gd , Dy, Ho, Tm, Yb, Lu, and the two elements that are closely related to the 15 elements of the system - (Sc) And yttrium (Y) a total of 17 elements, called rare earth elements. Referred to as rare earth.
Rare earth metals have been widely used in electronics, petrochemicals, metallurgy, machinery, energy, light industry, environmental protection, agriculture and other fields.
The abundance of rare earth elements in the earth's crust is not scarce, but the distribution is extremely uneven, mainly concentrated in China, the United States, India, the former Soviet Union, South Africa, Australia, Canada, Egypt and other countries. The major rare earth minerals include Baiyun Obo rare earth ore, Shandong Weishan rare earth ore, and Funing rare earth ore.
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