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Title: Method for recovering materials from waste

Abstract

A method for recovering metals from metals-containing wastes, a vitrifying the remainder of the wastes for disposal. Metals-containing wastes such as circuit boards, cathode ray tubes, vacuum tubes, transistors and so forth, are broken up and placed in a suitable container. The container is heated by microwaves to a first temperature in the range of approximately 300--800{degrees}C to combust organic materials in the waste, then heated further to a second temperature in the range of approximately 1000--1550{degrees}C at which temperature glass formers present in the waste will cause it to melt and vitrify. Low-melting-point metals such as tin and aluminum can be recovered after organics combustion is substantially complete. Metals with higher melting points, such as gold, silver and copper, can be recovered from the solidified product or separated from the waste at their respective melting points. Network former-containing materials can be added at the start of the process to assist vitrification.

Inventors:
; ;
Issue Date:
Research Org.:
Westinghouse Savannah River Co., Aiken, SC (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
206628
Patent Number(s):
-US-A8228901
Application Number:
ON: DE96006522; PAN: 8-228,901; TRN: 96:009339
Assignee:
Dept. of Energy SRS; SCA: 420200; 421000; PA: EDB-96:060454; NTS-96:012274; SN: 96001550316
DOE Contract Number:  
AC09-89SR18035
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 1994
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; METALS; MATERIALS RECOVERY; WASTES; VITRIFICATION; WASTE PROCESSING

Citation Formats

Wicks, G.G., Clark, D.E., and Schulz, R.L. Method for recovering materials from waste. United States: N. p., 1994. Web.
Wicks, G.G., Clark, D.E., & Schulz, R.L. Method for recovering materials from waste. United States.
Wicks, G.G., Clark, D.E., and Schulz, R.L. Sat . "Method for recovering materials from waste". United States. https://www.osti.gov/servlets/purl/206628.
@article{osti_206628,
title = {Method for recovering materials from waste},
author = {Wicks, G.G. and Clark, D.E. and Schulz, R.L.},
abstractNote = {A method for recovering metals from metals-containing wastes, a vitrifying the remainder of the wastes for disposal. Metals-containing wastes such as circuit boards, cathode ray tubes, vacuum tubes, transistors and so forth, are broken up and placed in a suitable container. The container is heated by microwaves to a first temperature in the range of approximately 300--800{degrees}C to combust organic materials in the waste, then heated further to a second temperature in the range of approximately 1000--1550{degrees}C at which temperature glass formers present in the waste will cause it to melt and vitrify. Low-melting-point metals such as tin and aluminum can be recovered after organics combustion is substantially complete. Metals with higher melting points, such as gold, silver and copper, can be recovered from the solidified product or separated from the waste at their respective melting points. Network former-containing materials can be added at the start of the process to assist vitrification.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}