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Title: Iron-phosphate ceramics for solidification of mixed low-level waste

Abstract

A method of immobilizing mixed low-level waste is provided which uses low cost materials and has a relatively long hardening period. The method includes: forming a mixture of iron oxide powders having ratios, in mass %, of FeO:Fe.sub.2 O.sub.3 :Fe.sub.3 O.sub.4 equal to 25-40:40-10:35-50, or weighing a definite amount of magnetite powder. Metallurgical cinder can also be used as the source of iron oxides. A solution of the orthophosphoric acid, or a solution of the orthophosphoric acid and ferric oxide, is formed and a powder phase of low-level waste and the mixture of iron oxide powders or cinder (or magnetite powder) is also formed. The acid solution is mixed with the powder phase to form a slurry with the ratio of components (mass %) of waste:iron oxide powders or magnetite:acid solution=30-60:15-10:55-30. The slurry is blended to form a homogeneous mixture which is cured at room temperature to form the final product.

Inventors:
 [1];  [1];  [1];  [2];  [3];  [4]
+ Show Inventor Affiliations
  1. St. Petersburg, RU
  2. Idaho Falls, ID
  3. Ozersk, RU
  4. Aberdeen, ID
Issue Date:
Research Org.:
Russian Federation of Atomic Energy
OSTI Identifier:
873036
Patent Number(s):
6075176
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
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Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
iron-phosphate; ceramics; solidification; mixed; low-level; waste; method; immobilizing; provided; cost; materials; relatively; hardening; period; forming; mixture; iron; oxide; powders; ratios; mass; feo; equal; 25-40; 40-10; 35-50; weighing; definite; amount; magnetite; powder; metallurgical; cinder; source; oxides; solution; orthophosphoric; acid; ferric; formed; phase; form; slurry; ratio; components; 30-60; 15-10; 55-30; blended; homogeneous; cured; temperature; final; product; phosphate ceramic; acid solution; phosphoric acid; iron oxide; oxide powder; oxide powders; homogeneous mixture; final product; level waste; ferric oxide; low-level waste; iron oxides; mixed low-level; immobilizing mixed; phosphate ceramics; /588/501/976/

Citation Formats

Aloy, Albert S, Kovarskaya, Elena N, Koltsova, Tatiana I, Macheret, Yevgeny, Medvedev, Pavel G, and Todd, Terry. Iron-phosphate ceramics for solidification of mixed low-level waste. United States: N. p., 2000. Web.
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Aloy, Albert S, Kovarskaya, Elena N, Koltsova, Tatiana I, Macheret, Yevgeny, Medvedev, Pavel G, & Todd, Terry. Iron-phosphate ceramics for solidification of mixed low-level waste. United States.
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Aloy, Albert S, Kovarskaya, Elena N, Koltsova, Tatiana I, Macheret, Yevgeny, Medvedev, Pavel G, and Todd, Terry. Sat . "Iron-phosphate ceramics for solidification of mixed low-level waste". United States. https://www.osti.gov/servlets/purl/873036.
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@article{osti_873036,
title = {Iron-phosphate ceramics for solidification of mixed low-level waste},
author = {Aloy, Albert S and Kovarskaya, Elena N and Koltsova, Tatiana I and Macheret, Yevgeny and Medvedev, Pavel G and Todd, Terry},
abstractNote = {A method of immobilizing mixed low-level waste is provided which uses low cost materials and has a relatively long hardening period. The method includes: forming a mixture of iron oxide powders having ratios, in mass %, of FeO:Fe.sub.2 O.sub.3 :Fe.sub.3 O.sub.4 equal to 25-40:40-10:35-50, or weighing a definite amount of magnetite powder. Metallurgical cinder can also be used as the source of iron oxides. A solution of the orthophosphoric acid, or a solution of the orthophosphoric acid and ferric oxide, is formed and a powder phase of low-level waste and the mixture of iron oxide powders or cinder (or magnetite powder) is also formed. The acid solution is mixed with the powder phase to form a slurry with the ratio of components (mass %) of waste:iron oxide powders or magnetite:acid solution=30-60:15-10:55-30. The slurry is blended to form a homogeneous mixture which is cured at room temperature to form the final product.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2000},
month = {Sat Jan 01 00:00:00 EST 2000}
}
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Works referenced in this record:

II, Cold-Setting Properties
journal, August 1950

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