System and method for concentrating rare earth elements from coal byproducts/slag
Abstract
The disclosure relates to a method for concentrating rare earth elements (REEs) from a coal byproduct. The method includes mixing the coal byproduct input with aluminum phosphate, sulfur and/or other compounds used as an additive; heating the coal byproduct input in air for a period of 3 minutes or longer at a temperature above a liquid starting temperature of the coal byproduct input, forming a molten coal byproduct; cooling the molten coal byproduct at a rate slower than critical glass transition cooling rate of the melt, forming REE phosphate product; heating the coal byproduct input above the liquid starting temperature of the coal byproduct after REE phosphate product is formed; and cooling the coal byproduct input at a rate faster than the critical glass transition cooling rate of the melt, minimizing forming unwanted solids.
- Inventors:
- Issue Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1568624
- Patent Number(s):
- 10,358,694
- Application Number:
- 15/790,636
- Assignee:
- U.S. Department of Energy (Washington, DC)
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 10/23/2017
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Nakano, Jinichiro, Nakano, Anna, and Bennett, James P. System and method for concentrating rare earth elements from coal byproducts/slag. United States: N. p., 2019.
Web.
Nakano, Jinichiro, Nakano, Anna, & Bennett, James P. System and method for concentrating rare earth elements from coal byproducts/slag. United States.
Nakano, Jinichiro, Nakano, Anna, and Bennett, James P. Tue .
"System and method for concentrating rare earth elements from coal byproducts/slag". United States. https://www.osti.gov/servlets/purl/1568624.
@article{osti_1568624,
title = {System and method for concentrating rare earth elements from coal byproducts/slag},
author = {Nakano, Jinichiro and Nakano, Anna and Bennett, James P.},
abstractNote = {The disclosure relates to a method for concentrating rare earth elements (REEs) from a coal byproduct. The method includes mixing the coal byproduct input with aluminum phosphate, sulfur and/or other compounds used as an additive; heating the coal byproduct input in air for a period of 3 minutes or longer at a temperature above a liquid starting temperature of the coal byproduct input, forming a molten coal byproduct; cooling the molten coal byproduct at a rate slower than critical glass transition cooling rate of the melt, forming REE phosphate product; heating the coal byproduct input above the liquid starting temperature of the coal byproduct after REE phosphate product is formed; and cooling the coal byproduct input at a rate faster than the critical glass transition cooling rate of the melt, minimizing forming unwanted solids.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {7}
}
Works referenced in this record:
Method for treating rare earth-transition metal scrap
patent, December 1992
- Schmidt, Frederick A.; Peterson, David T.; Wheelock, John T.
- US Patent Document 5,174,811