Extensive use of rare earth metals, has been described above. As an ore mineral raw material for smelting rare earth metals, the general industrial requirements have the following indicators: 1. Primary deposits of fluorocarbon antimony or monazite Boundary grade: Ce 2 O 3 1%; industrial grade: Ce 2 O 3 2%; recoverable thickness ≥ 2 m; stone removal thickness ≥ 2 m. Stretched and spinning bearing pulldy for Auto Tensioner and Idler. Tensioner Pulley,Aluminium Tensioner Pulley,Belt Idler Pulley,Drive Belt Idler Pulley Taizhou Chenhui Machinery Manufacturing Co., Ltd , https://www.chenhuipulley.com
Rare earth elements are often symbiotic together and difficult to separate. Therefore, in geological exploration, reserves can be calculated according to the total amount of rare earth elements.
(1) Light rare earth
2. Solitary sandstone ore Mine boundary grade: mineral 100～200g/m 3 ; industrial grade: mineral 300～500g/m 3 ; recoverable thickness ≥1m; stone removal thickness ≥1m.
(2) Heavy rare earth
1. The yttrium-containing (xenotime, gadolinite) carbonate rocks and pegmatite deposits Industrial Grade: Y 2 O 3 0.05% ~ 0.1%; thickness recoverable ≥1 ~ 2m; Rock Eliminating thickness ≥2m.
2. Phosphorus ore mine boundary grade: mineral 30g/m 3 ; industrial grade: mineral 50 ~ 70g / m 3 ; recoverable thickness ≥ 0.5m; stone removal thickness ≥ 2m.