Abstract: Using coal gangue pickle liquor as research object to extraction and explore gallium.Effect of extraction time, temperature, concentration and the kind of thinne on the extraction rates of galliumand were studied.Meanwhile, extraction of gallium from coal gangue pickle liquor by responce surface methodology were studied.The results show that:the result closes to the detected values, which indicating that the resulting model can reflect the true relationship between the parameters.This model can be used to analysising and forecasting for extraction rates of gallium.Determined the best molding process condition and providing the basis for industrial extraction of gallium from coal gangue pickle liquor production.

Key words: coal gangue;pickle liquor;extraction of gallium;P507;response surface methodology