CERAMIC SPONGE FOR CONCENTRATION AND HARDENING OF LIQUID EXTRAHAZARDOUS WASTE AND METHOD FOR ITS PRODUCTION

processing of liquid extrahazardous waste containing heavy metals and/or radionuclides, in particular, hardening of waste by inclusion of them in artificial ceramic compounds, applicable at radiochemical plants of nuclear power and nuclear-armory complexes, as well as in chemical and metallurgical i...

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Bibliographic Details
Main Authors ANSHITS A.G, VERESHCHAGINA T.A, SHARONOVA O.M, PAVLOV V.F
Format Patent
LanguageEnglish
Russian
Published 10.04.2001
Edition7
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
DECONTAMINATION ARRANGEMENTS THEREFOR
LIME, MAGNESIA
METALLURGY
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
PHYSICS
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT
REFRACTORIES
SLAG
TREATING RADIOACTIVELY CONTAMINATED MATERIAL
TREATMENT OF NATURAL STONE
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Summary:processing of liquid extrahazardous waste containing heavy metals and/or radionuclides, in particular, hardening of waste by inclusion of them in artificial ceramic compounds, applicable at radiochemical plants of nuclear power and nuclear-armory complexes, as well as in chemical and metallurgical industries. SUBSTANCE: for concentration and hardening of liquid extrahazardous waste use is made of a ceramic sponge based on hollow aluminosilicate microspheres, more than 20 mum in diameter, wall thickness exceeding 0.3 g/cu.cm, characterized by thermal stability and mechanical strength exceeding 2 MPa, as well as possessing an open porosity with an accessible unconfined space up to 70%. For its production hollow aluminosilicate microspheres are extracted from the flash obtained after burning of coals, mixed with a wetting agent and silicate binder at a ratio of weight of the components within 1:0.012-0.29:18 with formation of moulding mass, gas inclusions are removed from it with simultaneous moulding of blocks of preset dimensions and sintered at a temperature exceeding 800 C, but lower than the softening temperature, and at atmospheric pressure. EFFECT: enhanced mechanical strength while in transit, at rehandling and in storage, as well as acid resistance and thermal stability. 4 cl
Bibliography:Application Number: RU19990109609