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Handling method of copper nitrate waste liquid

A treatment method and technology of copper nitrate, applied in the direction of metallurgical wastewater treatment, nitric acid, filtration treatment, etc., can solve the problems of high cost, large power consumption, inapplicability, etc., and achieve the effects of convenient operation, efficient recovery and simple process

Inactive Publication Date: 2017-04-26
SHENZHEN RUN SUN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is not suitable for treating wastewater with low concentration of metal ions, and it consumes a lot of electricity and costs high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] Embodiment A kind of treatment method of novel copper nitrate waste liquid

[0023] 1) Pretreatment: Pass 2000kg of copper nitrate waste liquid through a sand filter first, and then through a microfiltration system with a pore size of 1 μl to remove all suspended matter to obtain the first solution;

[0024] 2) the first solution is carried out nitric acid recovery by diffusion dialysis device, obtains nitric acid solution 1800kg and the second solution, wherein, the nitric acid solution is supplemented with 65% concentrated nitric acid and returned to the production line for recycling;

[0025] 3) Filter the second solution and pump it into the swirl electrolysis device. The electrolytic circulation tank directly deposits copper through a single cycle, and the current density is set to 600-1000A / m 2 , the cyclone electrowinning process in the same module is completed in three stages, and different current densities are adopted according to the concentration of metal io...

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PUM

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Abstract

The invention discloses a handling method of copper nitrate waste liquid. The handling method includes steps of 1), pretreatment: filtering copper nitrate waste liquid and obtaining first solution; 2), applying diffusion and dialysis technologies to the first solution, and obtaining the salpeter solution and the second solution; 3), filtering the second solution, and pumping to a rotational flow electrolyzer; obtaining copper and third solution through rotational flow electrodeposition; 4), recycling copper obtained in step 3), and discharging the third solution to a comprehensive waste water pond. The method can efficiently recycle nitric acid and extract copper by electrolysis; the method is simple in technique, convenient to operate; the waste liquid can be recycled, and the method has good application value.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a treatment method for copper nitrate waste liquid. Background technique [0002] In the electroplating process, as the electroplating (chemical plating) process proceeds, the hangers as the supports of the plating parts are also plated with various metal coatings, and because the hangers are usually used repeatedly, a batch of workpieces are plated Then go directly to the next electroplating process. If the hanger is not cleaned in time before it is put into use, it will pollute other working pool liquids and affect product quality. Like the stripping of unqualified workpieces, the stripping of unqualified coatings usually has chemical There are two methods of stripping and electrolytic stripping. [0003] For most factories and mines engaged in the electroplating industry, especially some small and medium-sized enterprises, the nitric acid method i...

Claims

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Application Information

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IPC IPC(8): C02F9/06C01B21/46C25C1/12
CPCC01B21/46C02F1/001C02F1/44C02F1/444C02F1/46104C02F9/00C02F2101/163C02F2101/20C02F2103/16C02F2301/08C25C1/12Y02P10/20
Inventor 帅和平
Owner SHENZHEN RUN SUN CHEM TECH