Method for simultaneously separating copper-nickel alloy by pyrolysis residue of electroplating sludge and waste resin in coordination with melting and vitrification

By synergistically melting electroplating sludge and waste resin pyrolysis residue, the problem of inefficient disposal of electroplating sludge and waste resin pyrolysis residue has been solved, achieving efficient separation and recycling of copper-nickel alloy, reducing energy consumption and improving resource utilization rate.

CN122428142APending Publication Date: 2026-07-21SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Filing Date
2026-04-24
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Electroplating sludge and waste resin pyrolysis residue are difficult to process efficiently and in a coordinated manner, resulting in problems such as high melting point, high energy consumption, low metal recovery rate and high environmental risk.

Method used

By mixing electroplating sludge and waste resin pyrolysis residue in a certain proportion, and taking advantage of their complementary properties, the mixture is melted at high temperature to form a vitrified product and separate the copper-nickel alloy. The carbon in the waste resin pyrolysis residue is used as a reducing agent to achieve efficient reduction and vitrification of the metal.

Benefits of technology

This method achieves efficient separation and recycling of copper-nickel alloys, reduces melting temperature and energy consumption, and produces vitrified products with low heavy metal leaching toxicity, high hardness, and resistance to acid and alkali corrosion, thus realizing the resource utilization of all components.

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Abstract

The present application relates to solid waste resource utilization and harmless treatment technical field, especially to a kind of method for pyrolysis residue of electroplating sludge and waste resin cooperatively melting vitrification simultaneous separation copper-nickel alloy.The method includes: after being mixed with waste resin pyrolysis residue according to mass ratio (2-1):(1-2), it is heated for 40-70 minutes at 1100 DEG C~1250 DEG C, and is melted and treated, and after cooling, phase separation is obtained glassification product and copper-nickel alloy.The present application utilizes the characteristics of calcium-rich electroplating sludge and silicon-aluminum-carbon-rich waste resin pyrolysis residue, builds low-melting-point CaO-SiO2-Al2O3 slag system through component complementation, and in-situ reduces metal oxide with carbon in residue, simultaneously realizes metal efficient separation and melt vitrification stability;Realize the collaborative reduction, harmless and full-component high-value utilization of two types of solid waste.
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