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Device for recovering copper in old electronic printed circuit board and method

A technology for electronic printing and circuit boards, which is applied in the field of recycling and utilization of copper in waste electronic printed circuit boards, and can solve the problems that metals are rarely reported

Inactive Publication Date: 2009-09-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, scholars in the United States, Australia, China and other countries have done a lot of research on the suspension electrolysis technology, and have obtained certain applications in the metallurgical technology of mineral resources. There are few reports

Method used

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  • Device for recovering copper in old electronic printed circuit board and method
  • Device for recovering copper in old electronic printed circuit board and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. The metal in the waste electronic printed circuit board is crushed into 100-mesh particles by a pulverizer, and cleaned. Dry the cleaned metal particles at 100° C. in a blast drying oven.

[0032] 2. The tank body is made of plexiglass, cylindrical, with a diameter of 180mm, a height of 200mm, and a pole spacing of 30mm. The cathode is a carbon rod made of 99.99% graphite, 18 mm long and 8 mm in diameter for the experiment, and 8 rods are evenly distributed in the electrolytic cell.

[0033] The titanium anode basket is 160mm high and 100mm in diameter, and the titanium anode basket is covered with 200-mesh acid-proof polyester filter cloth.

[0034] 3. Configure the raw materials according to the formula in Table 1:

[0035] The raw material ratio of table 1 example 1

[0036] Raw material Concentration

[0037] CuSO 4 (provided Cu 2+ ) 25g / L (Cu 2+ Content is 10g / L)

[0038] h 2 SO 4 100g / L

[0039] NaCl (provides Cl - ) 50mg / L (Cl...

Embodiment 2

[0045] 1. The metal in the waste electronic printed circuit board is crushed into 50-mesh particles by a pulverizer, and cleaned. Dry the cleaned metal particles at 100° C. in a blast drying oven.

[0046] 2. The tank body is made of plexiglass, cylindrical, with a diameter of 180mm, a height of 200mm, and a pole spacing of 30mm. The cathode is a steel rod made of permanent stainless steel, with a length of 18 mm and a diameter of 8 mm for the experiment, and 8 rods are evenly distributed in the electrolytic cell. The titanium anode basket is 160mm high and 100mm in diameter, and the titanium anode basket is covered with 200-mesh acid-proof polyester filter cloth.

[0047] 3. Configure the raw materials according to the formula in Table 2:

[0048] The raw material ratio of table 2 example 2

[0049] Raw material Concentration

[0050] CuSO 4 (provided Cu 2+ ) 60g / L (Cu 2+ Content is 24g / L)

[0051] h 2 SO 4 150g / L

[0052] NaCl (provides Cl ...

Embodiment 3

[0058] 1. The metal in the waste electronic printed circuit board is crushed into 20-mesh particles by a pulverizer, and cleaned. Dry the cleaned metal particles at 100° C. in a blast drying oven.

[0059] 2. The tank body is made of glass fiber reinforced plastic, cylindrical, with a diameter of 180mm, a height of 200mm, and a pole spacing of 30mm. The cathode is made of pure copper rods, 18mm in length and 8mm in diameter for the experiment, 8 of which are evenly distributed in the electrolytic cell. The titanium anode basket is 160mm high and 100mm in diameter, and the titanium anode basket is covered with 200-mesh acid-proof polyester filter cloth.

[0060] 3. Carry out the configuration of raw materials according to the formula and mass parts in the following table:

[0061] The raw material ratio of table 3 example 3

[0062] Raw material Concentration

[0063] CuSO 4 (provided Cu 2+ ) 100g / L (Cu 2+ Content is 40g / L)

[0064] h 2 SO 4 ...

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Abstract

The invention provides a device for recovering copper in an old electronic printed circuit board by a suspension electrolysis method and a method. The suspension electrolysis device which comprises a groove body, a stirrer, a cathode and an anode is adopted; wherein, the anode is an anode basket, and a membrane is arranged between the anode basket and the cathode. The formulation of electrolyte used for recovering the copper in the old electronic printed circuit board comprises 10-50g / L of Cu<2+>, 100-180g / L of H2SO4 and 10-30mg / L of Cl<->; the mass ratio between the raw material of the circuit board and the electrolyte is 1:5-1:10, and the density of cathode current is 2-4A / dm<2>. The copper produced by the method takes the metal in the old electronic printed circuit board as the main raw material, and prepared by the suspension electrolysis method. The suspension electrolysis method utilizes the oxidization of the anode and anode energy in the electrolytic deposition process, can realize electrolytic deposition of the metal under the conditions of low cell voltage and low energy consumption, and has remarkable advantages in the aspects of metal separation and environmental pollution prevention.

Description

technical field [0001] The invention relates to the recovery and utilization of copper in waste electronic printed circuit boards, in particular to a device and method for recovering polymetallic in waste electronic printed circuit boards. Background technique [0002] With the rapid increase of electronic products and the continuous acceleration of the update rate, the domestic electronic waste production has also increased sharply. The large number of discarded circuit boards, high potential value and great environmental hazards make the recycling of discarded circuit boards have important recycling value and environmental protection significance. The author has carried out the experimental research on the dissolution of metal components in electronic printed circuit boards. The research shows that the circuit boards contain tin, lead, iron, zinc, copper, gold, silver and other metals, among which the content of copper is the highest. The recovery of metals also has a gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/12C25C7/04
CPCY02P10/20
Inventor 丁辉王哲李鑫钢张艳华
Owner TIANJIN UNIV
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