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A promising source of Rare-Earth Metals (REM) is the mine refuses of Obukhov deposit?s zircon concentrate, which contain 3.53% of the sum of REM oxides. Chlorination is an effective method for transferring metals from crude ore to chlorides convenient for subsequent separation, purification and production of marketable products. The advantage of such method is absence of sewage and discharge of harmful substances into the atmosphere, which is an effective measure for environmental protection. The paper performs a ...