Identifying and extracting rare earth elements from mining operations
View Patent ↗Described herein are technologies for bauxite or kaolin mining operations. A detector is used to detect the presence of a pathfinder element or radioactivity indicating a presence of a rare-earth element. Once the pathfinder element or radioactivity is detected, the mined material is segregated from material mined in which a pathfinder element or radioactivity was not detected. Rare-earth elements are extracted from the segregated material. Once the rare-earth elements are extracted, the material is returned to normal mining operation processing steps.
1. A method of extracting rare-earth elements from a mining, the method comprising:
using a detector on mining equipment;
receiving material mined from a mining operation, the material comprising bauxite or kaolin;
detecting using the detector a pathfinder element or radioactivity;
separating the material into a first material comprising the pathfinder element or radioactivity and a second material not having the pathfinder element or radioactivity; and
extracting at least one rare-earth element from the first material.
2. The method of claim 1 , wherein the pathfinder element comprises phosphorus.
3. The method of claim 1 , wherein the pathfinder element comprises titanium, or zirconium.
4. The method of claim 1 , wherein the radioactivity indicates Uranium or Thorium, (U-235, U-238, Th-232).
5. The method of claim 1 , further comprising:
crushing the kaolin to create crushed kaolin;
mixing the crushed kaolinite in a solution of water and a Na-hexametaphosphate;
allowing a grit portion of the crushed kaolin to settle;
separating the grit portion into a light grit fraction and a heavy grit fraction comprises mixing the grit into a heavy liquid mixture in a container;
allowing the heavy grit fraction to settle at a bottom of a container and the light grit fraction to rise to a top of the heavy liquid mixture comprising a heavy liquid, wherein the heavy liquid comprises lithium metatungstate, and wherein the heavy liquid comprises at least one of bromoform, tetrabromoethane (TBE), sodium polytungstate, or lithium metatungstate (LMT) Heavy Liquid; and
extracting the at least one rare-earth element from the heavy grit fraction by performing thermal treatment of the heavy grit fraction or acid baking of the heavy grit fraction.
6. The method of claim 1 , wherein the at least one rare-earth element comprises cerium (Ce), dysprosium (Dy), erbium (Er), europium (Eu), gadolinium (Gd), holmium (Ho), lanthanum (La), lutetium (Lu), neodymium (Nd), praseodymium (Pr), promethium (Pm), samarium (Sm), scandium (Sc), terbium (Tb), thulium (Tm), ytterbium (Yb) or yttrium (Y).
7. The method of claim 1 , wherein the material is mined from a mining operation in Georgia Coastal Plain.
8. The method of claim 1 , wherein the material is mined from a mining operation in Jeffersonville Member of a Paleocene-Eocene Huber Formation.