Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

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

Patent ·
OSTI ID:873036
 [1];  [1];  [1];  [2];  [3];  [4]
  1. St. Petersburg, RU
  2. Idaho Falls, ID
  3. Ozersk, RU
  4. Aberdeen, ID
+ Show Author Affiliations

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.

Research Organization:
Russian Federation of Atomic Energy
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 6075176
OSTI ID:
873036
Country of Publication:
United States
Language:
English

References (1)

II, Cold-Setting Properties journal August 1950

Similar Records

Related Subjects

/588/501/976/
15-10
25-40
30-60
35-50
40-10
55-30
acid
acid solution
amount
blended
ceramics
cinder
components
cost
cured
definite
equal
feo
ferric
ferric oxide
final
final product
form
formed
forming
hardening
homogeneous
homogeneous mixture
immobilizing
immobilizing mixed
iron
iron oxide
iron oxides
iron-phosphate
level waste
low-level
low-level waste
magnetite
mass
materials
metallurgical
method
mixed
mixed low-level
mixture
orthophosphoric
oxide
oxide powder
oxide powders
oxides
period
phase
phosphate ceramic
phosphate ceramics
phosphoric acid
powder
powders
product
provided
ratio
ratios
relatively
slurry
solidification
solution
source
temperature
waste
weighing