中国矿山工程

The gold content of the cyanogen-bearing tailings from a certain gold mine in Inner Mongolia is 0.7g/t; in order to comprehensively recover the valuable gold in the tailings, based on the study of process mineralogy, through mineral processing test, the determination is made that the process route of Cyanide Tailings-Pretreatment-Valuable Elements Recycling-Identification with Tailings-Qualified Disposal is used to recycle the cyanide tailings. The tailings after treatment that are identified as general solid waste are discharged into the tailings pond to be stockpiled and disposed, the tailings pond is built according to the requirements for disposing general solid wastes. The test results show that when the cyanide concentration in the cyanide tailings slurring phase is ≤10mg/L, the reagents of CG101-A and CG101-B are added with the amount of 0.5g/L and 0.6g/L respectively, which can lower the cyanide in the cyanide tailings slurring phase and toxic leachate to below 0.5mg/L. By using flotation process flow, the gold concentrate of 5.78g/t Au-grade and of 62.99% recovery can be obtained; the separation indicators are ideal, which can provide a certain reference for the comprehensive recovery of the secondary resources of this type of gold tailings.