Abstract:A large number of low-grade mercury-antimony tailing resources were piled up in a mercury-antimony tailing reservoir in northwest China，according to the characteristics of micrograin size, close symbiosis, lower grade of mercury-antimony than that of comprehensive recovery boundary and complex ore properties,mines. The efficient recovery of mercury-antimony resources from tailings in tailings ponds was realized under the condition of low dosage of potassium dichromate by using the technology of mercury-antimony mixture floating-regrinding medicine-mercury-antimony separation.a new mixed flotation collector A83 was developed and applied to enhance the flotation process. Under the condition of raw ore (mercury-antimony tailings pond tailings) mercury grade 0.084%, antimony grade 0.21%, the small-scale closed-circuit flotation test obtained mercury grade 46.89% in mercury concentrate, mercury recovery 50.243%, antimony grade 15.01% and antimony recovery 47.17%.