Comprehensive recycling method of thallium-containing zinc slag

The invention discloses a comprehensive recycling method of thallium-containing zinc slag. Treating the thallium-containing zinc slag at high temperature, recovering zinc and thallium in a flue gas collection manner, and separating the zinc and the thallium from iron in the thallium-containing zinc slag; washing the zinc and thallium-containing smoke dust with water, intensively eluting potassium, sodium and chloride ions in the zinc and thallium-containing smoke dust, and purifying salt in the zinc oxide powder; and finally, deeply removing thallium and heavy metals in the high-salinity wastewater by treating the dust washing wastewater with a thallium removal agent through a weak reduction complex breaking-polydentate chelating one-step method, and recovering to obtain high-value potassium sodium salt. A dust washing filter cake is pulpified, a porous biomass-based adsorbent is adopted for acidic heavy metal removal and thallium removal, a large number of negative charges are accumulated on the surface of t