The residual cyanide concentration of cyanide tailings in a gold mine is 60.06 mg/L,and the cyanide tailings slurry needs to be decyanated and discharged after reaching the standard.Therefore,the types of decyanation agents,the dosage of agents and the reaction time are tested.The results showed that the effect of PC-2#decyanation agent is better.Under the conditions of PC-2#dosage of 2 g/L and stir-ring reaction time of 2 h,the CN-concentration of cyanide tail liquid is reduced to 2.79 mg/L,the cyanide removal rate is 95.35%,and the process index is the best.The decyanation effect of PC-2#is remarkable,and the process is simple,which is beneficial to promote the production index and the stable operation of the system.
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