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Treatment method for recovering and utilizing trimanganese tetroxide industrial wastewater

A technology of trimanganese tetroxide and industrial wastewater, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problem of deep deamination of ammonia and manganese ion Unstable removal effect, waste of water resources and other problems, to achieve the effect of easy control of process conditions, good removal effect, and satisfying the effect of returning to production and use

Inactive Publication Date: 2012-04-25
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This water waste treatment method has an unstable removal effect on manganese ions, and it is difficult to discharge ammonia in depth by blowing off method. Discharging waste water after treatment is likely to cause environmental pollution and waste water resources.

Method used

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  • Treatment method for recovering and utilizing trimanganese tetroxide industrial wastewater
  • Treatment method for recovering and utilizing trimanganese tetroxide industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: see figure 1 , main ion concentration in wastewater: Mn 2+ >50mg / L; Ca 2+ >5mg / L; Mg 2+ >5mg / L:

[0022] (a), adding ammonia water (mass concentration: 25%) with a volume of 0-5% of the volume of the wastewater into the wastewater, and adjusting the pH between 9 and 10 to generate Mn(OH) 2 precipitation;

[0023] (b), adding volume to waste water is the hydrogen peroxide (mass concentration: 28%) of 0~2% of waste water volume as oxidizing agent, and the reaction time is 1~180min; Let the low price manganese hydroxide that generates be oxidized rapidly into high valence state Manganese oxides, making Mn 2+ The concentration is lower than 0.5mg / L;

[0024] (c), will filter with filter press and reclaim the waste water behind the manganese oxide and further remove fine particle by quartz sand filter;

[0025] (d), the liquid that (c) obtains is set as 100ml / h import ion exchange column that cation exchange resin is housed with flow rate, removes the ca...

Embodiment 2

[0027] Add 10ml ammonia water (mass concentration: 25%) to 4L waste water as neutralizer, adjust pH to be 9~10, then add 4ml hydrogen peroxide (mass concentration: 28%), at room temperature, 200r / min mechanical stirring, reaction 60min. After liquid-solid separation, the manganese ion content after pretreatment is as low as 0.02mg / L. The liquid was then introduced into a container containing 30ml H + Type D113 type cation exchange resin ion exchange column, the flow rate is set to 100ml / h, the Mn in the effluent 2+ 2+ 2+ <0.01mg / L.

Embodiment 3

[0029] Add 10ml of ammonia water (mass concentration: 25%) into 4L of waste water as a neutralizing agent, adjust the pH to 9-10, then pass in air with an air flow of 50L / h, mechanical stirring at 400r / min, and react at room temperature 3h. After liquid-solid separation, the manganese ion content after pretreatment is as low as 0.03mg / L. The liquid was then introduced into a container containing 30ml NH 4 + Type D001 type cation exchange resin ion exchange column, the flow rate is set to 100ml / h, the Mn in the effluent 2+ 2+ 2+ <0.01mg / L.

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Abstract

The invention discloses a treatment method for recovering and utilizing trimanganese tetroxide industrial wastewater. The method comprises the following processes of pretreatment manganese removal, plate-frame pressure filtration, mechanical filtration, ion exchange resin purification and the like. The method comprises the following steps: adding a neutralizer in waste water for regulating water with pH value between 8 and 11, then adding a proper amount of oxidizing agent, precipitating Mn<2+> in the solution, and filtering and removing, then filtering to remove the fine particles through mechanical filtration, finally passing the treated liquid through an ion exchange column by certain speed to remove the impurity ions like calcium and magnesium in water. The method of the invention is capable of thoroughly removing manganese by pretreatment, the obtained manganese oxide has high grade, the ion exchange resin is capable of thoroughly removing the ions of calcium, magnesium and the like, effluent quality is stable and can meet the water quality requirement of production. The invention has the advantages of simple equipment and operation, easy control of technology condition and low cost, and is suitable for industrial production requirement.

Description

technical field [0001] The invention relates to a method of purifying and treating the industrial waste water produced by the manganese powder suspension oxidation method and returning it to the production system, in particular to the treatment of the industrial waste water containing manganese, magnesium, calcium ions and ammonia nitrogen in the process of manganese metallurgy recycling method. Background technique [0002] At present, 90% of the output of electronic grade manganese tetroxide is the electrolytic metal manganese suspension oxidation method, and the water consumption per ton of manganese tetroxide is 5-20 tons, and the main harmful substance in the wastewater is NH 4 + and Mn 2+ , Mn 2+ The concentration is 400~600mg / L, NH 4 + The ion concentration is about 500mg / L. are far greater than the national emission standards. [0003] At present, the treatment method of industrial wastewater containing manganese but not ammonia is mainly based on precipitatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20C02F1/42
Inventor 楚广银瑰周兆安陈飞宇甘红祥陈小红
Owner CENT SOUTH UNIV
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