INSTALLATION TO OBTAIN RARE-EARTH METALS FROM THEIR FLUORIDES Russian patent published in 1997 - IPC

FIELD: metallurgy of rare-earth metals, production of rare-earth metals from their fluorides with the use of sealed chamber and melting pot. SUBSTANCE: installation has recovery chamber with hoppers to load fluorides of rare-earth metals and metal-recoverer. Recovery chamber includes heated melting pot discharge branches located in its bottom and having different heights. Branches are equipped with protective enclosures arranged at different heights from chamber bottom. Relation of heights of branches is form 1:3 to 1:10 and relation of heights of enclosures is from 1:5 to 1:40. Lower end of one branch is located in overflow sleeve and vessel is placed under the other end. Discharge chamber is positioned under recovery chamber and is separated from it by means of vacuum gate. Heated funnel and refining melting pot below which lingots located on rotary gear are anchored in discharge chamber uniaxially to overflow sleeve. EFFECT: improved functional efficiency of installation. 2 cl, 1 dwg