METHOD FOR EXTRACTION OF BERYLLIUM FROM BERYLLIUM CONCENTRATES Russian patent published in 2009 - IPC C01F3/00 C22B3/08 

FIELD: sewage treatment facilities.

SUBSTANCE: invention is related to processing of beryllium-containing ore concentrates with preparation of beryllium sulfate solution. Method for extraction of beryllium from beryllium concentrates includes mechanical activation of concentrates, low temperature sulfatisation of activated concentrates with sulfuric acid with continuous mechanical removal of reaction products from the surface of concentrate particles, high temperature sulfatisation of activated concentrates with sulfuric acid, water leaching of sulfatised product, leaching pulp separation in solution of beryllium sulfate and cake, water flushing of cake from beryllium sulfate, separation of flushing pulp into flushing solution and waste cake. At that mixture of beryllium and bertrandite-phenacite-fluorite concentrates is activated, with mass ratio in the range of 0.2-2.5. Low temperature and high temperature sulfatisations of activated concentrates is done for at least 1 and 2 hours accordingly.

EFFECT: invention makes it possible to increase extent of beryllium extraction into sulfate solution.

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