Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for recovering copper, zinc and nickel from electroplating sludge

A technology for electroplating sludge and recovering copper, applied in the directions of zinc sulfate, nickel sulfate, electrolytic components, etc., can solve the problems of low product purity, complex process, low recovery rate, etc., and achieve low process energy consumption, simple operation process, product The effect of high purity and yield

Pending Publication Date: 2022-07-15
CHINA ENFI ENGINEERING CORPORATION
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The main purpose of the present invention is to provide a kind of method that reclaims copper, zinc, nickel from electroplating sludge, to solve the operation complexity that exists when utilizing wet process to process electroplating sludge in the prior art, cost is high, product purity is low, The problem with relatively low recovery rates

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for recovering copper, zinc and nickel from electroplating sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The composition of sulfuric acid leaching solution of electroplating sludge produced in an electroplating park is shown in Table 1.

[0053] Table 1 Composition of electroplating sludge sulfuric acid leaching solution

[0054] Element Al 2 (SO4) 3

Cr 2 (SO4) 3

CuSO4 FeSO4 NiSO4 ZnSO 4

CaSO 4

g / l 9.96 29.09 14.66 7.76 6.94 16.97 1.72

[0055] It can be seen from the table that the initial concentrations of Cu, Ni and Zn are all low. The Cu, Ni, Zn in the sulfuric acid leaching solution of this electroplating sludge are recovered, and the method is as follows:

[0056] Cathode copper process: use sulfuric acid to adjust the pH value of the sulfuric acid leaching solution to 2, and then perform Lix984 extraction agent extraction, the first washing, and the first back-extraction in sequence to obtain a back-extracted copper sulfate solution. Among them, in the extraction process of Lix984 extractant, Lix984 is use...

Embodiment 2

[0071] The difference from Example 1 is:

[0072] Cathode copper process: use sulfuric acid to adjust the pH value of the sulfuric acid leaching solution to 1, and then perform Lix984 extraction agent extraction, the first washing, and the first back extraction in sequence to obtain a back-extracted copper sulfate solution. Among them, in the extraction process of Lix984 extractant, Lix984 is used as the extractant, and sulfonated kerosene is used as the diluent, wherein the weight concentration of Lix984 is 20%, and the extraction ratio is O / A=2 / 1; in the first washing process, the concentration of A 10g / L sulfuric acid aqueous solution was used as a detergent; in the first stripping process, a sulfuric acid aqueous solution with a concentration of 150g / L was used as a stripping agent, and the stripping ratio was O / A=2 / 1. The extraction with Lix984 extractant, the first washing and the first stripping are all multi-stage countercurrent methods. The extraction with Lix984 extr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for recovering copper, zinc and nickel from electroplating sludge. The method comprises the following steps: carrying out sulfuric acid leaching on the electroplating sludge, and then sequentially carrying out Lix984 extractant extraction, first washing and first reverse extraction; the reverse extraction copper sulfate solution is subjected to electrodeposition copper production; sequentially removing copper, iron, aluminum and chromium from the raffinate; adjusting the pH value of the purified liquid to 1.5-2, and then sequentially carrying out primary P204 extractant extraction, secondary washing and secondary reverse extraction; adjusting the pH value of the raffinate to 4-5, then sequentially carrying out secondary P204 extractant extraction, third washing and third reverse extraction, and sequentially carrying out P507 extractant extraction, fourth washing and fourth reverse extraction on the raffinate; and carrying out secondary evaporative crystallization on the reverse extraction nickel sulfate solution to obtain a nickel sulfate product. The method solves the problems of complex process, high cost, low product purity and low recovery rate when the electroplating sludge is treated by a wet process.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for recovering copper, zinc and nickel from electroplating sludge. Background technique [0002] Electroplating sludge refers to the sediment mainly composed of copper, nickel, chromium and other heavy metal hydroxides produced in the process of electroplating wastewater treatment, and belongs to hazardous waste. At present, the recycling of electroplating sludge can be divided into two methods: pyrometallurgy and hydrometallurgy. [0003] Pyrometallurgy mainly uses smelting technology to treat electroplating sludge to recover copper and nickel in it. The smelting technology uses coal and coke as fuel and reducing substances, and the auxiliary materials are iron ore, copper ore, limestone, etc. When smelting copper-based electroplating sludge, the furnace temperature is above 1300°C, and the melted copper is called matte; when smelting nickel-based electroplati...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22B7/00C22B15/00C22B19/20C22B23/00C22B19/30C25C1/12C25C7/06C22B3/30C22B3/38C01G9/06C01G53/10
CPCC22B7/007C22B15/0071C22B19/22C22B19/30C22B23/043C25C1/12C25C7/06C01G9/06C01G53/10
Inventor 桑园杜国山邱爽郑明臻崔宏志
Owner CHINA ENFI ENGINEERING CORPORATION
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com