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Beneficiation wastewater treatment method

A technology for mineral processing wastewater and a treatment method, which is applied in the field of reducing organic matter and suspended solids in mineral processing wastewater and industrial wastewater treatment, can solve the problems of difficult control of suction volume, unstable operation, low work efficiency, etc., to reduce one-time investment and The effect of operating costs, flexible and convenient operation management, stable and reliable quality

Active Publication Date: 2017-12-15
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] (1) Dissolved air method: the water pump suction type is difficult to control the suction volume, and the operation is unstable and the work efficiency is low; when the jet type suction system sucks, the gas-liquid contact time in the ejector is too short, the dissolved gas volume is small, and the efficiency is low. high energy consumption
[0006] (2) Dissolved air tank: Filling with filler can increase the rate of dissolved air, but the filler is easy to block, especially for wastewater with a high concentration of suspended solids
[0007] (3) Air release equipment: There is a blockage
Compared with the biodegradation method, the speed is fast and the efficiency is high, but the cost is high. For the purpose of recycling, it must be considered that the drug itself and the reaction product are non-toxic and harmless, and no secondary treatment is required.

Method used

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  • Beneficiation wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]The COD content in the wastewater of an iron ore dressing plant is 680mg / L, the suspended solids SS content is 1000mg / L, and the pH value is 9.0. In order to reduce the COD and SS content and achieve the purpose of recycling, the treatment process includes sump aeration, no transmission Flotation tank air flotation, chemical oxidation, flocculation sedimentation, activated carbon adsorption and other steps, the specific steps are as follows:

[0040] (1) Waste water enters the sump, and an aeration pipe network is laid on the bottom of the sump, and a blower is used for forced aeration, and the aeration volume is controlled at an air-to-water ratio of 5:1. A primary sedimentation tank is set at the rear end of the aeration tank.

[0041] (2) Use the water pump to pump the precipitated supernatant into the non-transmission flotation tank at a uniform speed for air flotation, further remove SS in the wastewater, keep the pH value at 9.0, and use the dosing system to add PA...

Embodiment 2

[0051] The COD content in the wastewater of a bauxite dressing plant is 680mg / L, the suspended matter SS content is 1000mg / L, and the pH value is 8.5. In order to reduce the COD and SS content to achieve the purpose of recycling, the wastewater treatment process of the dressing plant and the embodiment 1 is similar, except that:

[0052] (1) Keep the original pH value at 8.5;

[0053] (2) Deodorization collection and treatment device without step (6);

[0054] (3) In step (3), only compounded COD remover is added to the oxidation tank, without deodorant, and the type and dosage of the compounded agent are specially made according to the characteristics of the wastewater of the dressing plant. The oxidation time is 3h.

[0055] The treated wastewater of the dressing plant has a COD content of 50mg / L, a suspended solid SS content of 40mg / L, and a removal rate of 92.65% and 96.00%, respectively, which can be fully recycled without affecting production indicators. The specific i...

Embodiment 3

[0059] The COD content in the wastewater of a molybdenum ore dressing plant is 1800mg / L, the suspended solids SS content is 550mg / L, and the pH value is 8.0. In order to reduce the COD and SS content to achieve the purpose of recycling, the wastewater treatment process of the dressing plant is the same as that in Example 1 Similar, but the difference is: the type and amount of compound chemicals added to the oxidation tank in step (3) are specially made according to the characteristics of the waste water of the dressing plant, and the oxidation time is 2.5h. After treatment, the COD content is 80mg / L, the suspended solid SS content is 50mg / L, and the removal rates are 95.55% and 90.91% respectively, which can be fully recycled without affecting the production indicators. The specific indicators are shown in Table 3.

[0060] Table 3 The average indicators of wastewater treatment in a molybdenum ore dressing plant in Henan

[0061] Detection Indicator

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Abstract

A beneficiation wastewater treatment method relates to industrial wastewater treatment and is particularly a method for reducing organics (COD) and suspended solids (SS) in beneficiation wastewater. The beneficiation wastewater treatment method is characterized by comprising the following steps: (1) pumping beneficiation wastewater into a water collection pond to be subjected to forced aeration desiting; (2) adopting a no-transmission flotation cell to perform air flotation treatment; (3) performing deodorization and COD removal in an oxidation pond by a chemical oxidizing agent; (4) performing flocculent precipitation and separation; and (5) performing activated carbon adsorption. By adoption of the method, COD in water can be finally reduced to be lower than 100 mg / L, SS is lower than 70 mg / L, water can be recycled, the deodorization purpose is achieved, and the characteristics of high automation degree and flexible and convenient running management are achieved; and adding of the compound oxidizing agent cannot cause secondary pollution, when treated water is cyclically utilized, no adverse effect is taken on beneficiation indicators, the technological process is simple and convenient, the adaptability is strong, energy saving and cost reduction are achieved, and zero discharge of beneficiation wastewater can be realized.

Description

technical field [0001] The invention relates to a method for treating mineral processing wastewater, relating to industrial wastewater treatment, especially a method for reducing organic matter (COD) and suspended matter (SS) in mineral processing wastewater. Background technique [0002] Mineral dressing wastewater includes mineral processing drainage, overflow water after sedimentation and filtration of flotation products, and mine drainage. The water volume is large and the content of suspended solids is high, especially the overflow water after sedimentation and filtration. Due to the use of mineral dressing agents with various functions in the mineral processing process, such as collectors mainly composed of oleic acid, amines, xanthates, etc., foaming agents mainly composed of 2# oil, etc., polypropylene The flocculant based on macromolecular organic matter such as amide, etc., causes the overflow water after sedimentation and filtration of mineral processing products ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F103/10
CPCC02F1/24C02F1/283C02F1/5236C02F1/56C02F1/72C02F7/00C02F9/00C02F2001/007C02F2103/10C02F2303/02
Inventor 胡秋云郭鑫张建强李素敏吴国亮田应忠刘晰杨昊李莎莎马俊伟刘春玲姚杰刘中原张站云
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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