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Method for continuously treating electrolytic manganese wastewater to recover manganese and ammonia nitrogen resources

A technology of electrolytic manganese and wastewater, which is applied in the direction of metallurgical wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems that manganese and ammonia nitrogen cannot be recovered separately, and have not been applied in large-scale industrialization, so as to reduce work intensity, Easy operation and management, high purity effect

Inactive Publication Date: 2020-09-01
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention patent with the publication number CN101838064A proposes a method of recovering manganese and ammonia nitrogen in wastewater by resin exchange, but it is difficult to separate manganese and ammonia nitrogen through resin in practical applications. For the composite polluted wastewater actually produced by electrolytic manganese plants, Unable to achieve separate recovery of manganese and ammonia nitrogen
None of the above technologies has been applied in large-scale industrialization

Method used

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  • Method for continuously treating electrolytic manganese wastewater to recover manganese and ammonia nitrogen resources
  • Method for continuously treating electrolytic manganese wastewater to recover manganese and ammonia nitrogen resources
  • Method for continuously treating electrolytic manganese wastewater to recover manganese and ammonia nitrogen resources

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Embodiment 1

[0048] The invention has been technically transformed in an electrolytic manganese factory in Guizhou, and put into operation. It has been successfully applied in industrial production, and the production runs well. In this example, the waste water and leachate of a slag reservoir in an electrolytic manganese workshop in Guizhou were taken as examples, and the analysis results of the waste water are shown in Table 1.

[0049] Table 1: Analysis results of electrolytic manganese wastewater (%)

[0050]

[0051]

[0052] The continuous method for reclaiming manganese and ammonia nitrogen resources from the electrolytic manganese workshop wastewater and the electrolytic manganese slag warehouse wastewater of the present embodiment comprises the following steps:

[0053] (1) Wastewater collection: collect the electrolytic manganese slag reservoir leachate Mn content of 14000mg / l and electrolytic manganese production wastewater Mn content of 4000mg / l in the collection pool and...

Embodiment 2

[0064] In this example, wastewater from an electrolytic manganese workshop in Guizhou and leachate from a slag reservoir were taken as examples, and the analysis results of wastewater are shown in Table 2.

[0065] Table 2: Analysis results of electrolytic manganese wastewater (%)

[0066]

[0067] The operation steps and control parameters of the second embodiment are consistent with those of the first embodiment.

[0068] In this example, the waste water collection is mainly to collect the Mn content of the electrolytic manganese slag reservoir leachate with a Mn content of 9770mg / l and the electrolytic manganese production wastewater with a Mn content of 1826mg / l in the collection pool and fully mix them to stabilize the water quality fluctuation of the raw water;

[0069] In this instance, the manganese carbonate slag manganese content of sedimentation pressure filtration gained reaches 40%, carries out X-ray diffraction analysis to manganese carbonate slag, and the man...

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Abstract

The invention discloses a method for continuously treating electrolytic manganese wastewater to recover manganese and ammonia nitrogen resources, which comprises the following steps: sending electrolytic manganese wastewater into a first-stage stirring reaction tank, regulating the pH value, and adding an ammonium bicarbonate solution at the same time; feeding the reacted wastewater into a first-stage sedimentation tank, adding a flocculating agent for flocculent precipitation, and carrying out filter pressing on underflow sediments to obtain manganese carbonate residues; sending the supernatant overflow and the filter pressing filtrate into a second-stage stirring reaction tank, adjusting the pH value to enable the residual manganese and heavy metal ions to generate hydroxide precipitate,and enabling ammonia nitrogen to generate free ammonia; feeding the reacted wastewater into a second-stage sedimentation tank; feeding the supernatant overflow into a three-stage stirring reaction tank, and adding carbonate to generate calcium carbonate precipitate; feeding the reacted wastewater into a third-stage sedimentation tank; preheating the supernatant overflow, and feeding the preheatedsupernatant overflow into a steam stripping deamination tower for deamination treatment; adjusting the pH value of the effluent of the tower kettle, and discharging the effluent. the purposes of effective treatment of electrolytic manganese comprehensive wastewater and comprehensive recycling of resources are achieved.

Description

technical field [0001] The invention is applied to the technical field of waste water treatment in manganese industry workshops and valuable components in waste water containing manganese and ammonia nitrogen and resource utilization, and in particular relates to a method for comprehensive continuous treatment of waste water containing manganese and ammonia nitrogen to recover manganese and ammonia water. Background technique [0002] Although my country's electrolytic manganese industry started late, it has developed rapidly and has become the largest electrolytic manganese production, export and consumption country in the world. The wastewater produced in the production of electrolytic manganese has complex components and heavy pollution load. The wastewater contains various pollutants such as manganese, ammonia nitrogen, and suspended solids, and is also rich in a large amount of calcium and magnesium ions. Manganese and ammonia nitrogen are both pollutants and a resource...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01G45/00C01C1/02C02F103/16C02F101/16
CPCC01C1/022C01C1/026C01G45/00C02F1/001C02F1/20C02F1/5236C02F1/66C02F9/00C02F2101/16C02F2103/16C02F2301/08
Inventor 张茂毛拥军王金明王东宾婵婵余侃萍陈沪飞陈泽宗
Owner CHANGSHA RES INST OF MINING & METALLURGY
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