Wastewater treatment method for lean iron ore sorting factory

Abstract

The invention relates to an extremely-needed iron ore factory-selection sewage treatment method capable of realizing energy conservation and consumption reduction and increasing in-factory water circulation utilization rate. The sewage treatment method is characterized in that: the method is completed through three steps including a concentration process, a clarification process and concentrated recovery treatment of factory-selection scattered sewage; a factory-selection total drain opening is provided with a sewage settling tank so as to intercept factory-selection leakage sewage; a sewage lift pump station is arranged beside the settling tank; a slurry pump is used to carry out continuous pumping to a mud accumulation area at the bottom of the settling tank; bottom mud is conveyed backto a concentration tank to carry out treatment, and then is lifted by a sewage pump; and the bottom mud is conveyed back to a mechanical acceleration oblique plate clarifying pool so as to carry out treatment. The method realizes high-concentration conveying to factory-selection tailings and avoids superfluous water carried off in order to convey the tailings; meanwhile, the method realizes energy conservation and consumption reduction and reduces factory-selection production cost, thereby furthest realizing the economic operation of a factory-selection sewage treatment system; the treated sewage can replace the produced new water during use, thereby saving the consumption of the produced new water and increasing in-factory water circulation utilization rate; moreover, the extremely-needed iron ore factory-selection sewage treatment method realizes zero discharge of the factory-selection sewage, and fundamentally controls environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment in a poor iron ore dressing plant, and relates to a sewage treatment method for a poor iron ore dressing plant that can save energy and reduce consumption, and improve the recycling rate of self-works water. Background technique [0002] In the known technology, there is a flotation process in the abject beneficiation process, and the sewage is discharged after the air flotation process, so the produced sewage has high turbidity, fine particles, high viscosity, and poor sedimentation performance. The quality of the recycled water after treatment is often Influence selection indicators. At present, the treatment of sewage in small-scale depleted iron ore concentrators generally adopts the method of sending sewage to tailings ponds, and the sewage returns to the concentrator for recycling after sedimentation in tailings ponds; The commonly used method for the treatment of sewage in mineral...

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Problems solved by technology

[0003] The present invention overcomes the above-mentioned defects, and aims to provide a new method of sewage treatment for the problems of low concentration of tailings transported in abject iron ore dressing plants, fine tailings particle size and muddy, and the quality of circulating water directly affects the sorting index. : Sewage is concentrated first to ensure that the tailings of the concentrator can be transported at a high concentration, thereby reducing the excess water taken away by the tailings and avoiding the waste of electric energy consumed by transporting this part of the water; the sewage is then clarified for further treatment. To ensure the quality of circulating water in the dressing plant; finally, the scattered sewage such as running and leaking in the dressing plant is collected and recycled, and returned to the sewage treatment system of the dressing plant for recycling in the dressing plant after treatment

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