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Title: Method for treating waste containing stainless steel

Abstract

A centrifugal plasma arc furnace is used to vitrify contaminated soils and other waste materials. An assessment of the characteristics of the waste is performed prior to introducing the waste into the furnace. Based on the assessment, a predetermined amount of iron is added to each batch of waste. The waste is melted in an oxidizing atmosphere into a slag. The added iron is oxidized into Fe{sub 3}O{sub 4}. Time of exposure to oxygen is controlled so that the iron does not oxidize into Fe{sub 2}O{sub 3}. Slag in the furnace remains relatively non-viscous and consequently it pours out of the furnace readily. Cooled and solidified slag produced by the furnace is very resistant to groundwater leaching. The slag can be safely buried in the earth without fear of contaminating groundwater. 3 figs.

Inventors:
; ; ; ; ; ;
Issue Date:
Research Org.:
MSE Inc
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
335457
Patent Number(s):
5877394
Application Number:
PAN: 8-946,549; TRN: 99:004582
Assignee:
PTO; SCA: 540230; 052001; 052002; PA: EDB-99:047232; SN: 99002077360
DOE Contract Number:  
AC22-88ID12735
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 2 Mar 1999
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 05 NUCLEAR FUELS; PLASMA FURNACES; SOILS; VITRIFICATION; IRON; SLAGS; IRON OXIDES; LEACHING; WASTE FORMS; GROUND DISPOSAL; RADIOACTIVE WASTE PROCESSING; RADIOACTIVE WASTE DISPOSAL

Citation Formats

Kujawa, S T, Battleson, D M, Rademacher, Jr, E L, Cashell, P V, Filius, K D, Flannery, P A, and Whitworth, C G. Method for treating waste containing stainless steel. United States: N. p., 1999. Web.
Kujawa, S T, Battleson, D M, Rademacher, Jr, E L, Cashell, P V, Filius, K D, Flannery, P A, & Whitworth, C G. Method for treating waste containing stainless steel. United States.
Kujawa, S T, Battleson, D M, Rademacher, Jr, E L, Cashell, P V, Filius, K D, Flannery, P A, and Whitworth, C G. Tue . "Method for treating waste containing stainless steel". United States.
@article{osti_335457,
title = {Method for treating waste containing stainless steel},
author = {Kujawa, S T and Battleson, D M and Rademacher, Jr, E L and Cashell, P V and Filius, K D and Flannery, P A and Whitworth, C G},
abstractNote = {A centrifugal plasma arc furnace is used to vitrify contaminated soils and other waste materials. An assessment of the characteristics of the waste is performed prior to introducing the waste into the furnace. Based on the assessment, a predetermined amount of iron is added to each batch of waste. The waste is melted in an oxidizing atmosphere into a slag. The added iron is oxidized into Fe{sub 3}O{sub 4}. Time of exposure to oxygen is controlled so that the iron does not oxidize into Fe{sub 2}O{sub 3}. Slag in the furnace remains relatively non-viscous and consequently it pours out of the furnace readily. Cooled and solidified slag produced by the furnace is very resistant to groundwater leaching. The slag can be safely buried in the earth without fear of contaminating groundwater. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {3}
}