The invention relates to a method for extracting gallium from alumina production flow. It adopts ISEP ion separation technique and adsorption gallium chelating resin. Its technology conditions are as follows: back flow adsorbing that liquor in Bayer process is processed by two stage series connection to make gallium concentration difference be 50-60 mg/L; back flow washing by 0.5-1N sodium hydroxide solution for the resin; back flow desorbing by 2-3N sodium hydroxide and 0.6-1.0N sodium sulfide solution; back flow rebirthing by 0.5-1N sodium hydroxide solution for the resin. It has the advantages of short flow, simple operation, little resin abrasion, high automation etc. |