FIELD: metallurgy.
SUBSTANCE: invention refers to a method for extraction of gallium from fly ash. The method involves crushing of fly ash and extraction of Fe by magnetic separation. Then, it is diluted with hydrochloric acid so that hydrochloric-acid leaching product is obtained, gallium is adsorbed by means of macroporous cationic resin, and further elution is performed so that a gallium-containing eluent is obtained. Then, a masking agent is added for masking of a trivalent iron ion so that a gallium-containing eluent is obtained. After masking is completed, gallium is adsorbed in the eluent by means of macroporous cationic resin with further elution and production of the secondary eluent, solution of sodium hydroxide is added to the secondary eluent for carrying out the reaction, and a deposit is filtered and removed after the reaction is completed. Then, the filtrate is concentrated and an electrolysis is performed so that metallic gallium is obtained.
EFFECT: simplifying process and increasing gallium extraction degree.
19 cl, 2 dwg, 1 tbl, 9 ex
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