Recovery of recyclable metals from waste glass melts
- Virginia Military Institute, Lexington, VA (United States)
The redox chemistries of copper and silver were determined in borosilicate glass melts representative of those to be used in nuclear waste immobilization and electronic circuit board vitrification. The recovery of these elements during waste processing depend on their solubilities, which are controlled by the Cu{sup 2+}-Cu{sup +}-Cu{sup 0} and Ag{sup +}-Ag{sup 0} redox equilibria in the melt. The copper and the silver redox equilibria operate independently without interaction in melts simultaneously containing both elements. The individual equilibria are independent of the total content of copper (to 10 wt%) and of silver (to 5 wt%) in glass. Immiscible metallic copper separates from the melt at oxygen fugacities more reducing than that required for silver metal precipitation. After settling, the metallic liquids tend to react at the melt/metal interface with the alumina container and {open_quotes}drill{close_quotes} through the container bottom under oxidizing conditions.
- OSTI ID:
- 39178
- Report Number(s):
- CONF-940416-; TRN: 95:000602-0011
- Resource Relation:
- Conference: 96. annual meeting of the American Ceramic Society (ACS), Indianapolis, IN (United States), 25-28 Apr 1994; Other Information: PBD: 1994; Related Information: Is Part Of Ceramic transactions: Environmental and waste management issues in the ceramic industry II. Volume 45; Bickford, D.; Bates, S.; Jain, V.; Smith, G. [eds.]; PB: 513 p.
- Country of Publication:
- United States
- Language:
- English
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