The invention relates to the technical field of
pickling waste liquid treatment, in particular to a rapid recycling method of
zinc-containing
pickling waste liquid. The method comprises the followingsteps: injecting the
zinc-containing
pickling waste liquid into a
sedimentation tank, slowly injecting a saturated
ammonium bicarbonate solution until the pH value of the
system is 6.2-6.6, standing and
settling at 30-35 DEG C for 15-20 hours, filtering the lower precipitate, adding the
filter cake into a washing tank, washing with a
sodium hydroxide solution, and
drying, and obtaining a basic
zinc carbonate crude product; enabling the ball-milled basic zinc
carbonate crude product to enter a suspension calcining device under the driving of hot air, performing primary suspension preheating to300-350 DEG C, performing secondary suspension heating to 550-600 DEG C, finally heating to 800-850 DEG C, performing suspension calcining, collecting zinc
oxide obtained by suspension calcining through a
cyclone collector, enabling separated hot air to enter a primary suspension process for recycling. High-purity zinc
oxide is obtained by the method so that waste is turned into wealth; the methodis low in cost, high in efficiency, high in product quality and
environmentally friendly, and a good technical scheme is provided for treating the zinc-containing pickling waste liquid in the iron and steel industry.