Process for treating and recycling beneficiation waste water of lead and zinc sulfide ores

Abstract

The invention provides a process for treating and recycling beneficiation waste water of lead and zinc sulfide ores, which comprises the steps of sequentially treating the beneficiation waste water in an ozone reactor and a biological active carbon reactor, and recycling the treated water in a beneficiation procedure. The ozone generator utilizes pure oxygen prepared by an oxygen generator, and the ozone is prepared by the ozone generator; the ozone is filled to the reactor by a hose pipe, and an aeration head is connected at the front end of the hose pipe; and the microorganisms at the biological active carbon segment of the biological active carbon reactor are inoculated by active sludge, and the microorganisms use glucose as a carbon source at the starting stage. The process of the invention has the advantages of effectively treating the beneficiation waste water of lead and zinc sulfide ores, the removal rate of the waste water TOC (total organic carbon) is larger than 80%, and the treated waste water is recycled in the beneficiation procedure without affecting the beneficiation indexes; and ozone oxidization is used for effectively removing the residual macromolecular organic matters in the beneficiation waste water with short reaction duration and high reaction efficiency, and the biological active carbon treatment process can be used for completely degrading the residual small molecular organic matters and greatly reducing the metal ions in the waste water. Furthermore, compared with the traditional treatment process of beneficiation waste water, the capital construction investment is reduced by 50%, and the operation cost is reduced by 70%.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a process for treating lead-zinc sulfide ore beneficiation waste water by using ozone oxidation and biological activated carbon, and reusing the treated waste water in the beneficiation process. Background technique [0002] The beneficiation process is an important process in the processing of non-ferrous metal minerals. Generally speaking, in the non-ferrous metal beneficiation, the water used for flotation of 1 ton of ore is 4-7m 3 , re-select water 20 ~ 26m 3 , Floating Magnetic Union chooses water 23 ~ 27m 3 , the heavy-floating unit uses 20-30m of water 3 , Excluding the amount of recycled water, most of the consumed water is discharged from the concentrator along with the tailings in the form of tailings slurry. The lead-zinc beneficiation process generally adopts the process of first selecting lead and then selecting zinc. Due to the different pharmaceutical s...

AI Technical Summary

Problems solved by technology

Due to the different pharmaceutical systems in the process of lead selection and zinc selection, the wastewater from zinc selection cannot be reused for lead selection, but can only be discharged into the tailings pond

At present, some mines use the method of returning water from tailings ponds and adding new water to reuse part of the mineral processing wastewater. During the long-term cycle, the accumulation of residual organic matter in the water body will lead to the deterioration of the mineral processing effect. Therefore, it is urgent to develop high-efficiency, low-cost, short-term A new process for resource recycling of mineral processing wastewater

Images