Wolframine beneficiation wastewater treatment process

A technology for scheelite beneficiation and wastewater treatment, applied in mining wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as high cost, high energy consumption, and poor effect

Active Publication Date: 2016-01-20
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of high energy consumption, high cost and poor effect in the prior art scheelite beneficiation wastewater treatment process, the present invention proposes a scheelite beneficiation wastewater treatment process

Method used

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  • Wolframine beneficiation wastewater treatment process
  • Wolframine beneficiation wastewater treatment process
  • Wolframine beneficiation wastewater treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of scheelite beneficiation wastewater treatment process, combined with figure 1 , the steps are:

[0042] A. Add lime to the scheelite beneficiation wastewater, and adjust the pH value to 11-12; adding lime milk can not only destroy the colloidal stability of the wastewater, but also precipitate and remove heavy metal ions in the wastewater at the same time; however, adding a large amount of lime Milk will cause the pH value to exceed the standard (pH value is about 12), and direct discharge may form a large amount of calcium-containing minerals in the river; the treated wastewater is used in scheelite beneficiation, and high pH value will also inhibit scheelite. In the flotation process of ore, the excess calcium ions contained will adsorb and activate gangue minerals, resulting in the consumption of a large amount of collectors in the flotation process. Adjusting the pH value will lead to the precipitation of silicic acid sol, and white flocculent sediments wi...

Embodiment 2

[0053] The wastewater from the tailings pond of a scheelite beneficiation enterprise is apparently clear, because the lime treatment is alkaline, and the pH value is 11-12. If it is directly discharged into the water body, a light yellow sedimentary pollution zone will quickly form downstream of the discharge outlet; if the current When the acid is added to adjust the pH value to 8-9, a large amount of flocculent floating matter will be formed tens of meters downstream of the discharge outlet; in order to reduce sewage discharge and improve the reuse rate of wastewater, the company reuses part of the tailings pond wastewater , but has a negative impact on the recovery rate of scheelite.

[0054] The discharge water samples were taken for detection and analysis, and the following results were obtained:

[0055] 1) The volatile organic compound VSS content of the flocs downstream of the discharge outlet is about 20%, indicating that the flocs are not formed by substances charact...

Embodiment 3

[0060] After the scheelite beneficiation wastewater has been treated with lime, coagulation sedimentation and plate and frame filtration, the main indicators have reached the discharge standard, but there will still be existing environmental impact problems. In view of the water quality characteristics of the effluent from the existing treatment process of scheelite beneficiation wastewater and the requirements for tail water reuse and discharge after treatment, the micro-flocculation filtration and micro-vortex reaction of special fillers for chemical precipitation are selected in combination with the technology of blowing off free carbon dioxide by wind to realize the removal of residual carbon dioxide. Removal of harmful mineral impurities.

[0061] The basic principles of the present invention are chemical precipitation, micro-flocculation filtration, micro-vortex reaction and wind blowing off: use sodium carbonate and PAM to chemically react with residual harmful mineral i...

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Abstract

The invention discloses a wolframine beneficiation wastewater treatment process, and belongs to the field of industrial wastewater treatment. The method comprises the following steps of A, adding lime into wolframine beneficiation wastewater, so that the pH value is regulated to 11 to 12; B, performing solid-liquid separation after destabilization precipitation; C, discharging solid into a tailing pond, putting inlet and outlet water into a first-stage reaction tank, and adding sodium carbonate; D, putting into a second-stage reaction tank, adding coagulant aids PAM into the second-stage reaction tank to take flocculation reaction with the PAM; E, performing self flowing to put into a precipitation pool, and discharging the bottom layer concentration sewage into the tailing pond; F, putting supernatant fluid into a micro-flocculation filter, using 5-percent outlet water as reverse flushing water to be discharged into the tailing pond; G, adding concentrated sulfuric acid into 95-percent outlet water to regulate the pH value to 6 to 9; H, putting the outlet water into a micro eddy current reaction pool, and using the 5-percent outlet water as flushing water to be discharged into the tailing pond; I, eliminating carbon dioxide from 95-percent outlet water through a degassing tower, so that the water can be reused for wolframine beneficiation or can be directly discharged. The process has the advantage that the wolframine beneficiation wastewater reuse rate is improved.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, and in particular relates to a process for treating scheelite beneficiation wastewater. Background technique [0002] Due to the addition of sodium silicate (commonly known as water glass, which is a commonly used inhibitor) in the scheelite flotation process, the fine particles in the pulp form a very stable colloidal dispersion system. The beneficiation wastewater contains a large amount of suspended solids that are difficult to settle, and has the physical and chemical characteristics of colloids. The colloidal particles are in a state of suspension and uniform distribution without being destroyed, and have stability. Colloids have sedimentation stability due to the fine dispersion of particles and the diffusion effect produced by Brownian motion against gravity. However, because the colloid is a multi-phase dispersion system, it has a large interphase interface and a huge free...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/10
Inventor 吴军李俊张浩然韩诚张艺邵川王敏刘佳诘
Owner NANJING UNIV
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