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The justification of the need to remove fluorine from the complex beryllium-containing concentrates during their treatment before the stage of beryllium hydroxide precipitation is given. The analysis of possible ways of fluorine elimination from beryllium raw materials has been carried out.
In order to investigate the possibility of fluorine removal, processes of sulfuric leaching of the dispersed beryl-bertrandite-phenakite product melted with fluxes, and further thermal treatment have been investigated. The intermediate and final products have been studied by the IR-spectrometry and X-ray diffraction analysis.
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