METHOD OF COMBINED PROCESSING OF BERYLLIUM CONCENTRATES Russian patent published in 2015 - IPC C22B35/00 C22B3/08 

FIELD: chemistry.

SUBSTANCE: beryllium concentrate is activated by its milling until X-ray amorphous product with size of particles less than 5 mcm is obtained, and bertrandite-phenacite-fluorite concentrate is activated by addition in it of fluorine-containing compounds in quantity which ensures fluorine content 10÷25 wt %. Then, activated beryllium concentrate is processed with sulphuric acid and obtained acid pulp is added to activated bertrandite-phenacite-fluorite concentrate. After that, formed reaction mass is sulphatised for 1.5÷2 h at temperature 115÷125°C with continuous mechanical removal of reaction products from the surface of particles of activated concentrates with the following exposure at temperature 250÷300°C for not less than 1 h.

EFFECT: increase of beryllium extraction in rough beryllium hydroxide due to sedimentation completeness.

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