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Pyroprocessing (from Greek Πυρος = fire) is a process in which materials are subjected to high temperatures (typically over 800 °C) in order to bring about a chemical or physical change. Pyroprocessing includes such terms as ore-roasting , calcination and sintering .
Pyroprocessing does not use radiation sensitive solvents and is not easily disturbed by decay heat. It can be used on highly radioactive fuel directly from the reactor. [ 31 ] Having the chemical separation on site, close to the reactor avoids transport and keeps the total inventory of the fuel cycle low.
Structure of uranyl nitrate complex that is extracted in PUREX. [9]The fuel is first dissolved in nitric acid at a concentration around 7 M.Solids are removed by filtration to avoid the formation of emulsions, referred to as third phases in the solvent extraction community.
Pyrometallurgy is a branch of extractive metallurgy.It consists of the thermal treatment of minerals and metallurgical ores and concentrates to bring about physical and chemical transformations in the materials to enable recovery of valuable metals. [1]
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A rotary kiln is a pyroprocessing device used to raise materials to a high temperature (calcination) in a continuous process. Materials produced using rotary kilns include: Cement; Lime; Refractories; Metakaolin; Titanium dioxide; Alumina; Vermiculite; Iron ore pellets
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