Magnetic iron oxides in the cementation technology of the boron-containing radioactive waste

International Scientific Conference on "Radiation-Thermal Effects and Processes in Inorganic Materials"

材料科学;物理学

Fedotov, M.A.^1 ; Gorbunova, O.A.^2 ; Fedorova, O.V.^3 ; Folmanis, G.E.^1 ; Kovalenko, L.V.^4

A.A.Baykov's Institute of Metallurgy and Material Science RAS, Leninsky Ave 49, Moscow

119991, Russia^1

Department of Department, FSUE RADON of State Corporation ROSATOM, 7th Rostovsky lane 2/14, Moscow

119121, Russia^2

Department of Laboratory, FSUE RADON of State Corporation ROSATOM, 7th Rostovsky lane 2/14, Moscow

119121, Russia^3

Department of Laboratory, A.A.Baykov's Institute of Metallurgy and Material Science RAS, Leninsky Ave 49, Moscow

119991, Russia^4

关键词: Boron-containing;    Cementation process;    Dispersed particle;    Ferromagnetic rod;    Hydrogen reduction;    Liquid radioactive wastes;    Low temperatures;    Magnetic iron oxides;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/81/1/012063/pdf
DOI  :  10.1088/1757-899X/81/1/012063

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Two ways of synthesis of non-detachable dispersed particles of magnetic materials useful for the boron-containing waste cementation process regulation were developed. Powder XRD showed that the method of carbothermic recovery of nanoscale iron hydroxide allows obtaining a mixture of iron oxides with content of the magnetic phase up to 70%. Method of low-temperature hydrogen reduction of the raw materials allows obtaining various compositions of a-iron and iron oxides with the possibility to change the size of the final particles in a wide range. The possibility of using composites of magnetic iron oxides and metal oxide compositions instead of ferromagnetic rods with VEP of boron-containing liquid radioactive waste in the fluidized field was studied. It was shown that the use of fine and nano particles of the iron oxides in the pre-treatment of the boron-containing LRW increases the strength of the final compounds and accelerates the cement setting compounds from 13 to 5-9 days.