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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.

Inventors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7]
  1. 1819 Princeton, Butte, MT 59701
  2. 2606 Hancock, Butte, MT 59701
  3. (3321 Keokuk, Butte, MT 59701)
  4. 730 West Park, Butte, MT 59701
  5. 1806 B St., Butte, MT 59701
  6. P.O. Box 128, Ramsey, MT 59478
  7. 4646 Utah Ave., Butte, MT 59701
Issue Date:
Research Org.:
MSE INC
OSTI Identifier:
872175
Patent Number(s):
5877394
Assignee:
Kujawa, Stephan T. (1819 Princeton, Butte, MT 59701);Battleson, Daniel M. (2606 Hancock, Butte, MT 59701);Rademacher, Jr., Edward L. (3321 Keokuk, Butte, MT 59701);Cashell, Patrick V. (730 West Park, Butte, MT 59701);Filius, Krag D. (1806 B St., Butte, MT 59701);Flannery, Philip A. (P.O. Box 128, Ramsey, MT 59478);Whitworth, Clarence G. (4646 Utah Ave., Butte, MT 59701)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23G - CREMATION FURNACES
C - CHEMISTRY C03 - GLASS C03B - MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
DOE Contract Number:  
AC22-88ID12735
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; treating; waste; containing; stainless; steel; centrifugal; plasma; furnace; vitrify; contaminated; soils; materials; assessment; characteristics; performed; prior; introducing; based; predetermined; amount; iron; added; batch; melted; oxidizing; atmosphere; slag; oxidized; time; exposure; oxygen; controlled; oxidize; remains; relatively; non-viscous; consequently; pours; readily; cooled; solidified; produced; resistant; groundwater; leaching; safely; buried; earth; fear; contaminating; contaminated soils; solidified slag; contaminated soil; waste material; stainless steel; waste materials; predetermined amount; treating waste; oxidizing atmosphere; waste containing; remains relatively; centrifugal plasma; performed prior; formed prior; containing stainless; vitrify contaminated; water leaching; /588/75/148/219/

Citation Formats

Kujawa, Stephan T, Battleson, Daniel M, Rademacher, Jr., Edward L., Cashell, Patrick V, Filius, Krag D, Flannery, Philip A, and Whitworth, Clarence G. Method for treating waste containing stainless steel. United States: N. p., 1999. Web.
Kujawa, Stephan T, Battleson, Daniel M, Rademacher, Jr., Edward L., Cashell, Patrick V, Filius, Krag D, Flannery, Philip A, & Whitworth, Clarence G. Method for treating waste containing stainless steel. United States.
Kujawa, Stephan T, Battleson, Daniel M, Rademacher, Jr., Edward L., Cashell, Patrick V, Filius, Krag D, Flannery, Philip A, and Whitworth, Clarence G. Fri . "Method for treating waste containing stainless steel". United States. https://www.osti.gov/servlets/purl/872175.
@article{osti_872175,
title = {Method for treating waste containing stainless steel},
author = {Kujawa, Stephan T and Battleson, Daniel M and Rademacher, Jr., Edward L. and Cashell, Patrick V and Filius, Krag D and Flannery, Philip A and Whitworth, Clarence 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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