The invention relates to a method for treating
zinc-containing
cyanide barren solution, comprising the following process steps and conditions: sulfuration acidification reaction, first adding soluble
sulfide to the
zinc-containing
cyanide barren solution, then adding concentrated
sulfuric acid to carry out acidification reaction, and adjusting the pH value of the solution , add PAM,
set aside for
settling,
solid-liquid separation Ⅰ, separate
sediment Ⅰ,
tail gas and supernatant, and transport
sediment Ⅰ to the
zinc smelting enterprise for comprehensive recycling; to neutralize the
sediment, first add Alkali, adjust the pH value to 9.0-11.5 for
neutralization and
precipitation, then
solid-liquid separation II, separate sediment II and
tail water, sediment II and
cyanide tailings are treated together,
tail water is returned to the cyanide
system for reuse, and tail gas
recovery , send the tail gas produced in the first step to the absorption
tower through negative pressure, add lye, separate the absorption liquid and empty the purified gas, and return the absorption liquid to neutralize the
precipitation. It has the ability to efficiently remove Zn, Cu, Fe and other metals, efficient
recovery of cyanide, toxic and harmful gas absorption treatment, comprehensive
recovery of Zn and Cu in sediment, short process flow, simple and
safe operation, easy to implement, etc., suitable for zinc-containing cyanide barren solution in gold
smelting industry
Handle the application.