Separating and recycling method of nickel, cobalt, copper manganese and zinc in electroplating sludge

A technology for separation and recovery of electroplating sludge, which is applied in the field of separation and recovery of cobalt and zinc, copper, manganese and nickel in electroplating sludge. The effect of short technological process, good social and economic benefits, and small investment in equipment

Inactive Publication Date: 2014-09-24
JIANGXI GUANGDE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the technical problem that the existing electroplating sludge separation and recovery method has a single type of metal for separation and recovery, and the electroplating sludge cannot be completely non-toxic.

Method used

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  • Separating and recycling method of nickel, cobalt, copper manganese and zinc in electroplating sludge
  • Separating and recycling method of nickel, cobalt, copper manganese and zinc in electroplating sludge
  • Separating and recycling method of nickel, cobalt, copper manganese and zinc in electroplating sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for separating and recovering nickel, cobalt, copper, manganese and zinc in electroplating sludge is realized through the following steps:

[0049] Step 1, performing acid leaching treatment on the electroplating sludge, and filtering to obtain leachate and filter residue; wherein, the acid leaching treatment specifically refers to the iron removal operation on the electroplating sludge by using the yellow sodium iron vanadium method;

[0050] Step 2, using the P507 kerosene extraction system to carry out fractional distillation and extraction of the leaching solution to obtain an organic phase and a nickel-rich raffinate;

[0051] Step 3, the organic phase is carried out step by step stripping:

[0052] (1), the organic phase is back-extracted with hydrochloric acid with a concentration of 0.5 to 2 mol / L to obtain an organic phase I and a back-extraction solution I containing cobalt, calcium and magnesium;

[0053] (2), be that 1~2mol / L sulfuric acid is carri...

Embodiment 2

[0070] Compared with Example 1, this Example 2 is different in that the concentration of the stripping liquid used in the step-by-step back-extraction of Step 3 is different, and the rest of the steps and parameters are the same as in Example 1. Specifically, the specific content of Step 3 of Embodiment 2 is as follows:

[0071] Step 3, the organic phase is carried out step by step stripping:

[0072] (1), the organic phase is back-extracted with hydrochloric acid with a concentration of 1mol / L to obtain an organic phase I and a back-extraction solution I containing cobalt, calcium and magnesium;

[0073] (2), with a concentration of 1.2mol / L sulfuric acid, the organic phase I is back-extracted to obtain the organic phase II and copper- and manganese-containing stripping solution II;

[0074] (3), be that 2.5mol / L sulfuric acid is carried out stripping to organic phase II with concentration, obtain organic phase III and zinc sulfate solution;

[0075] (4) Back-extracting the...

Embodiment 3

[0077] Compared with Example 1, this Example 3 is different in that the concentration of the stripping liquid used in the step-by-step stripping in Step 3 is different, and the rest of the steps and parameters are the same as in Example 1. Specifically, the specific content of Step 3 of Embodiment 3 is as follows:

[0078] Step 3, the organic phase is carried out step by step stripping:

[0079] (1), the organic phase is back-extracted with hydrochloric acid with a concentration of 0.8mol / L to obtain an organic phase I and a back-extraction solution I containing cobalt, calcium and magnesium;

[0080] (2), with a concentration of 1.1mol / L sulfuric acid, the organic phase I is back-extracted to obtain the organic phase II and copper- and manganese-containing stripping solution II;

[0081] (3), be that 2.3mol / L sulfuric acid is carried out stripping to organic phase II with concentration, obtain organic phase III and zinc sulfate solution;

[0082] (4) Back-extracting the org...

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Abstract

The invention provides a separating and recycling method of nickel, cobalt, copper manganese and zinc in electroplating sludge. The method comprises the steps that acid leaching is performed on the electroplating sludge to obtain leaching agents for fractional extraction, organic phases and nickel-rich raffinate are obtained, four steps of reverse extraction are performed on the organic phases by sequentially adapting hydrochloric acid, vitriol, the vitriol and the hydrochloric acid, and four kinds of corresponding strip liquor are achieved; then follow-up recycle is performed on the nickel-rich raffinate and the four kinds of strip liquor, and separation and recycle of the nickel, the cobalt, the copper manganese and the zinc are completed. According to the method, the complete extraction mode is adopted, the nickel, the cobal, calcium, magnesium, the copper, manganese and the zinc are sequentially extracted step by step and then recycled respectively, a technology procedure is short, production efficiency is high, the equipment investment is small, operation cost is low, the environment is protected, recycling of the nonferrous metal is achieved, and good social benefits and economical benefits are obtained.

Description

technical field [0001] The invention relates to the technical field of recovery and treatment methods for electroplating sludge, in particular to a method for separating and recovering nickel, cobalt, copper, manganese and zinc in electroplating sludge. Background technique [0002] Electroplating sludge is a product of electroplating wastewater treatment process, which is a common and typical hazardous waste. It contains a large amount of harmful heavy metals that are difficult to degrade, and has the characteristics of easy accumulation, instability, and loss. If they are not treated and stacked arbitrarily, these heavy metals will cause serious environmental pollution under the action of rain. If the electroplating sludge is not properly disposed of, It will also cause more serious and longer-term secondary pollution. [0003] The current separation and recovery methods for heavy metals in electroplating sludge have a single type of recovered metals, and most of them are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/06C22B3/40C22B23/00C22B15/00C22B47/00C22B19/30
CPCY02P10/20
Inventor 甘力南
Owner JIANGXI GUANGDE ENVIRONMENTAL PROTECTION TECH CO LTD
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