A self-cleaning backwater treatment method

Abstract

The invention discloses a self-cleaning backwater treatment method. According to the self-cleaning backwater treatment method, tailing water obtained through floatation of a last aim mineral is adopted as initial backwater, the initial backwater and ore pulp which is to be subjected to last aim mineral flotation are mixed, and then the mixed ore pulp is dewatered to obtain overflow water and dewatered ore pulp; the dewatered ore pulp serves as the flotation ore pulp of the last aim mineral; and the overflow water serves as backwater to return to crude ore pulp. Through the self-cleaning backwater treatment method, the content of the agent which affects flotation of the firstly-floating aim mineral in the backwater can be effectively lowered, the adverse effect of the ore pulp prepared fromthe backwater on flotation of the firstly-floating aim mineral is avoided, the cost can be greatly lowered, energy can be saved, consumption is lowered, the flotation time is shortened, and the flotation recovery rate and the agent utilization rate are improved.

Description

technical field [0001] The invention relates to the technical field of mineral flotation backwater treatment, in particular to a self-cleaning backwater treatment method. Background technique [0002] In order to avoid the discharge of mineral processing wastewater and realize the effective use of water resources, most of the tailings water from mineral flotation will be reused as backwater in the mineral flotation system, so the quality of the backwater will directly affect the flotation Effect. [0003] For ores containing a variety of recyclable minerals, the process of mineral flotation is a process of gradually separating various purpose minerals, so the flotation process of a circulation section of the multi-purpose mineral separation flotation system can be divided into the first section There are three parts: flotation, middle stage flotation and final stage flotation. Among them, the first stage flotation refers to the flotation of the target minerals that are firs...

AI Technical Summary

Problems solved by technology

[0004] Currently, if figure 1 As shown, in a complete multi-purpose mineral separation flotation system of the prior art, after the raw ore is made into raw ore slurry through grinding, the flotation (i.e. the first stage flotation) of the purpose mineral that floats first will be carried out, and the separated The target mineral that floats first, and then the flotation of the remaining target minerals (ie, the middle stage flotation) will be carried out until the flotation of the last target mineral (ie, the final stage flotation) to obtain tailings water, and the tailings water It will be used as return water (often the concentrate water of the last target mineral will also be used as return water together with tailings water) to the grinding process or the flotation of the first target mineral to float, so the water quality of the return water will directly Affecting the flotation effect of the first stage flotation

Because the collectors used for the flotation of the last purpose minerals (and these collectors will remain in the tailings water more or less) will be unfavorable to the first floating target minerals when they are separated from the rest of the minerals by flotation Therefore, if these tailings water is directly returned to the grinding process or the first stage flotation as return water without any treatment, it will have an adverse effect on the first stage flotation, which will seriously reduce the separated first stage The concentrate grade of the foam product will increase the impurity content, which will reduce the product quality and the recovery rate of each metal, and deteriorate the entire flotation process

[0005] In order to eliminate substances in the backwater that are not conducive to the flotation of the minerals that first float up, such as figure 2 As shown, in the prior art, the backwater is usually sent to the sewage treatment station for treatment first, and the backwater in the sewage treatment station is first coagulated and precipitated to remove harmful metal ions and suspended solids in the backwater, and then through physical and chemical treatment technology , oxidation treatment technology, catalytic oxidation treatment technology, biological treatment technology, biochemical treatment technology and other methods to remove organic matter, so that the return water will not have an adverse effect on the flotation of the first floating target mineral; but this in the prior art The processing cost of this treatment method is relatively high

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