Mine tailing waste water cyclic utilization system

A waste water recycling and tailings technology, applied in mining waste water treatment, multi-stage water treatment, water/sewage multi-stage treatment, etc. The effect of impurity content, simple system structure and high separation efficiency

Pending Publication Date: 2018-07-27
WENGFU DAZHOU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the extensive use of polyacrylamide, the concentration of COD in tailings return water is high, the viscosity increases, and equipment pipelines are often blocked. It is difficult to meet the standard for circulating water use only by conventional coagulation and sedimentation technology, which seriously restricts the development of mineral processing enterprises.
In the prior art, for the degradation of PAM, methods such as potassium ferrate, sodium hypochlorite, and Fenton reagent are used to completely oxidize PAM to inorganic substances, thereby realizing the removal of PAM. In addition to the increased amount and high operating costs, the treated wastewater can only be discharged and cannot be reused because of the increased chemical and salt content in the wastewater after dosing.

Method used

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  • Mine tailing waste water cyclic utilization system
  • Mine tailing waste water cyclic utilization system
  • Mine tailing waste water cyclic utilization system

Examples

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Embodiment 1

[0040] The present invention provides a tailings wastewater recycling system, comprising: a solid-liquid separation unit, a solid collection unit, a liquid collection unit, and a filter unit. The solid-liquid separation unit is connected to the solid collection unit and the liquid collection unit, respectively. The liquid collection unit is connected to the filter unit, the solid-liquid separation unit includes a reaction tank and a thickener connected in sequence, the solid collection unit includes an underflow pump and a phosphoric acid reslurry tank, and the liquid collection unit includes a sequential connection The buffer tank and the pool, the filter unit includes a bag filter and a flocculant configuration tank connected in sequence, the thickener has two upper and lower outlets, and the upper outlet of the thickener is connected to the inlet of the buffer tank, so The lower outlet of the thickener is connected with the inlet of the underflow pump, the middle of the buffe...

Embodiment 2

[0041] Example 2: In the present invention, the Lijiagou tailings backwater recycling system in Dazhou is taken as an example for evaluation.

[0042] 2.1 Overview of process flow

[0043] The working process of the tailings wastewater recycling system in the present invention is as follows:

[0044] In order to ensure the continuity of the water supply to the adjustment pool, first discharge the tailings wastewater into the reaction tank, and then into the thickener (volume 1450m 3 ), in which flocculant can be added according to the turbidity of the tailings wastewater. The impurities are rapidly flocculated under the action of the flocculant and deposited on the bottom of the thickener, and the upper liquid is relatively clear. The above-mentioned tailings wastewater after flocculation is quickly separated, wherein the lower flocculated impurities are pumped into the phosphoric acid reslurry tank in the solid collection unit through an underflow pump, and the upper liquid enters t...

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Abstract

The invention provides a mine tailing waste water cyclic utilization system. The mine tailing waste water cyclic utilization system comprises a solid-liquid separating unit, a solid collection unit, and a liquid collection unit, the solid-liquid separating unit comprises a reaction tank and a thickening machine, the solid collection unit comprises an underflow pump and a phosphoric acid repulpinggroove, the liquid collection unit comprises a buffer pool and a pool, and the solid-liquid separating unit is respectively connected with the solid collection unit and the liquid collection unit. Thecyclic utilization system has the advantages of simple structure and high efficiency, can rapidly separate impurities in the mine tailing waste water, and realizes re-utilization.

Description

Technical field [0001] The invention relates to the technical field of waste water recovery, in particular to a tailings waste water recycling system. Background technique [0002] Phosphate rock is an indispensable basic raw material for the production of phosphate fertilizer and phosphorus chemical products. my country's phosphate rock reserves are 16.786 billion tons, with an average grade of 16.95%. Phosphate ore flotation process is more common in phosphorous chemical industry. Phosphate ore is subjected to positive and negative flotation, roughing, sweeping, and beneficiation to obtain phosphate concentrate. The phosphate flotation process will produce a lot of waste water. Contains a large amount of acidic substances, which will pollute the environment. With the rise of phosphorous chemical industry in the past ten years, the problem of wastewater generated by the flotation process of phosphate rock cannot be ignored. In order to implement national safety laws and regulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/10
CPCC02F9/00C02F2301/08C02F2103/10C02F2001/007C02F1/52C02F1/001
Inventor 叶国成赵枫欧阳龙
Owner WENGFU DAZHOU CHEM CO LTD
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