Technology for extracting copper powder from waste materials generated in circuit board manufacturing plants by compound extraction method

A technology of circuit boards and production plants, applied in the fields of comprehensive utilization, environmental protection, and electronic product recycling, to achieve the effect of saving investment and improving the right to speak

Inactive Publication Date: 2010-03-03
无锡金品环境技术有限公司
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of mature industrialized chlor-alkali electrolyzer for electrolysis, the problem of chlorine gas collection in the electrolysis system is well solved

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
  • Technology for extracting copper powder from waste materials generated in circuit board manufacturing plants by compound extraction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] February 12, 2008

[0044] Raw materials: 1 ton of waste circuit boards; 5 tons of copper chloride etching solution with 10% copper content; 0.2 tons of copper sludge; 0.65 tons of waste alkali; 1 ton of copper and ferric chloride with 4% copper content; 1 waste acid Ton.

[0045] Circuit board processing system: After 1 ton of waste circuit boards are crushed, stripped and sorted, 0.2 tons of copper material is obtained, which enters the etching solution processing system; 0.8 tons of resin is outsourced for disposal and utilization.

[0046] Copper-containing ferric chloride treatment system: 1 ton of copper-containing ferric chloride solution with a copper concentration of about 4%. After adding 62kg of iron powder, 53.1kg of sponge copper (purity 75%) is obtained, which enters the etching solution processing system; the remaining mother liquor Enter the exhaust gas treatment system.

[0047] Waste acid treatment system: 1 ton of waste acid, 33kg iron oxide scale is added, ...

Embodiment 2

[0051] August 27, 2008

[0052] Raw materials: 1 ton of waste circuit boards; 5 tons of copper chloride etching solution with 11% copper content; 0.3 tons of copper sludge; 0.70 tons of waste alkali; 1 ton of copper ferric chloride with 4% copper content; 1 waste acid Ton.

[0053] Circuit board processing system: After 1 ton of waste circuit boards are crushed, stripped and sorted, 0.2 tons of copper material is obtained, which enters the etching solution processing system; 0.8 tons of resin is outsourced for disposal and utilization.

[0054] Copper-containing ferric chloride treatment system: 1 ton of copper-containing ferric chloride solution with a copper concentration of about 4%. After adding 65kg of iron powder, 55kg of sponge copper (purity 75%) is obtained, which enters the etching solution processing system; the remaining mother liquor enters Exhaust gas treatment system.

[0055] Waste acid treatment system: 1 ton of waste acid, 35kg iron oxide scale is added, and the fil...

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 relates to a technology for extracting copper powder from waste materials generated in circuit board manufacturing plants by a compound extraction method, belonging to the technical fields of electronic product recovery, comprehensive utilization and environment protection. In the invention, the technology is divided into six sets of subsystems, namely a waste circuit board processing system, a copper-bearing ferric chloride processing system, a waste acid processing system, a CuCl2 etching solution processing system, a system for producing hydrogen by electrolysis and a waste gas processing system. The invention can simultaneously process waste circuit boards (HW49), CuCl2 etching solution (HW22), copper-bearing ferric chloride (HW22), waste alkali (HW35) and waste acid (HW34), and combines several sets of processing technologies in which the products are used as raw materials mutually, thereby saving the investment. The processing systems are contained in one technology, thereby solving the problem of the processing of most of hazardous wastes of heavy metals in an electronic plant. The product quality reaches or exceeds the level of electrolytic copper, each unit system in the technology for extracting copper powder is a mature technology, the used equipment is prototype equipment, and the initial investment is less. Moreover, the problem of harm to environment, human bodies and ecology by hazardous wastes is solved, and the natural environment is effectively protected.

Description

Technical field [0001] A composite extraction method (CE-TECH) is a process for extracting copper powder from waste materials of circuit board production plants, which belongs to the technical field of electronic product recycling, comprehensive utilization and environmental protection. Background technique [0002] There are many methods for recovering copper from copper chloride etching solution (HW22), which can be summarized as follows: [0003] 1. Substitution method: Use Fe, Zn, Al, etc., which are more active than copper, to replace the copper in the etching solution with metal sponge copper, and form FeCl at the same time 2 , ZnCl 2 , AlCl 3 . This method is simple, but the quality of the recovered sponge copper is low, and the produced Fe, Zn, and Al chlorides need to be concentrated and crystallized. Sponge copper needs to be cast, refined and electrolyzed to obtain electrolytic copper. [0004] 2. Electrolysis method: Copper chloride is electrolyzed to produce electrolyt...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22C22B7/00C22B15/00
CPCY02P10/20
Inventor 吴基生田喜林陈鑫
Owner 无锡金品环境技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap