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Wastewater treatment technology for electrolysis of manganese metal

A technology for electrolytic manganese metal and wastewater treatment, which is applied in metallurgical wastewater treatment, water/sewage treatment, water treatment parameter control, etc. It can solve the problems of waste of resources and no recycling, and achieve the effect of saving resources.

Inactive Publication Date: 2019-01-18
四川中哲新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The beneficial substances in the wastewater are not recycled, resulting in a waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The wastewater treatment process of electrolytic manganese metal provided by the present embodiment comprises the following steps:

[0019] (1) collect the waste water produced in the electrolytic manganese metal process and mix it and stir evenly, measure the temperature and hexavalent chromium content of the waste water;

[0020] (2) According to the temperature measured in step (1), the wastewater is heated to keep its temperature at 30°C, which is conducive to the chemical reaction of the neutralizer and flocculant in the later stage;

[0021] (3) On the basis of step (2), according to the hexavalent chromium content measured in step (1), add neutralizer and stir, the stirring speed is 200r / min, the stirring time is 10min, and the addition amount of neutralizer is hexavalent chromium Add 2 to the hexavalent chromium content to completely reduce the hexavalent chromium. The neutralizer is a mixture of iron powder and sulfuric acid.

[0022] (4) Regulate the pH value...

Embodiment 2

[0026] The wastewater treatment process of electrolytic manganese metal provided by the present embodiment comprises the following steps:

[0027] (1) collect the waste water produced in the electrolytic manganese metal process and mix it and stir evenly, measure the temperature and hexavalent chromium content of the waste water;

[0028] (2) According to the temperature measured in step (1), the waste water is heated to keep its temperature at 35°C, which is conducive to the chemical reaction of the neutralizer and flocculant in the later stage;

[0029] (3) On the basis of step (2), according to the hexavalent chromium content measured in step (1), add neutralizer and stir, the stirring speed is 250r / min, the stirring time is 9min, and the addition amount of neutralizer is hexavalent chromium Add 2 to the hexavalent chromium content to completely reduce the hexavalent chromium. The neutralizer is a mixture of iron powder and sulfuric acid.

[0030] (4) Regulate the pH value...

Embodiment 3

[0034] The wastewater treatment process of electrolytic manganese metal provided by the present embodiment comprises the following steps:

[0035] (1) collect the waste water produced in the electrolytic manganese metal process and mix it and stir evenly, measure the temperature and hexavalent chromium content of the waste water;

[0036] (2) According to the temperature measured in step (1), the waste water is heated to keep its temperature at 40°C. This temperature is conducive to the chemical reaction of the neutralizer and flocculant in the later stage;

[0037] (3) On the basis of step (2), according to the hexavalent chromium content measured in step (1), add neutralizer and stir, the stirring speed is 300r / min, the stirring time is 10min, and the addition amount of neutralizer is hexavalent chromium Add 2 to the hexavalent chromium content to completely reduce the hexavalent chromium. The neutralizer is a mixture of iron powder and sulfuric acid.

[0038] (4) Regulate ...

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Abstract

The invention discloses a wastewater treatment technology for electrolysis of manganese metal. The wastewater treatment technology comprises the following steps: (1) collecting the wastewater generated during the electrolysis of manganese metal, and mixing and stirring uniformly; measuring the temperature of the wastewater and the content of hexavalent chromium; (2) heating the wastewater according to the temperature measured in the step (1) to keep the temperature at 30-40 DEG C; (3) based on the step (2), adding a neutralizing agent according to the content of hexavalent chromium measured inthe step (1), and stirring for 8-10min at a speed of 200-300r / min; (4) adjusting the pH value of the wastewater to keep the pH value at 9-10; adding a flocculant and stirring for 5-7min at a speed of150-250r / min; after the stirring, standing and settling for 12-24h; (5) after the settling, performing solid-liquid separation; treating the liquid through chemical oxidation and then discharging; leaching and drying the solid before recycling. According to the wastewater treatment technology disclosed by the invention, the manganese metal in the wastewater generated by the electrolysis of the manganese metal can be purified up to standard and then discharged, and moreover, the metals in the wastewater can be recycled.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a wastewater treatment process for electrolytic manganese metal. Background technique [0002] Electrolytic manganese produces wastewater with complex composition and heavy pollution load. Wastewater contains various pollutants such as total manganese, hexavalent chromium, total chromium, suspended solids, sulfate, ammonia nitrogen, etc. This substance is both a pollutant and a resource. In the prior art, the treatment of electrolytic manganese wastewater is simply to remove the hexavalent chromium in the wastewater after suspension treatment, so as to make it meet the discharge standard. The beneficial substances of the wastewater are not recycled, resulting in a waste of resources. Contents of the invention [0003] The object of the present invention is to provide a wastewater treatment process for electrolytic manganese metal that can recycle beneficial substa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/16C02F101/22C02F101/20
CPCC02F1/5245C02F1/66C02F1/705C02F1/725C02F1/78C02F9/00C02F2101/206C02F2101/22C02F2103/16C02F2201/782C02F2209/02C02F2209/06C02F2305/023
Inventor 范强
Owner 四川中哲新材料科技有限公司
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