Method for rapidly dissolving copper

A copper-dissolving and fast technology, applied in the direction of copper sulfate, etc., can solve the problems of low production efficiency, low oxidation potential, slow copper dissolution speed, etc., and achieve the effect of reduced evaporation, high oxidation potential and increased charging capacity

Active Publication Date: 2019-06-21
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using air (mainly oxygen in the air) as an oxidant, the oxidation potential is low, only 400-500mV, the speed of copper dissolution is slow, the reaction time is long, and the production efficiency is low

Method used

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  • Method for rapidly dissolving copper
  • Method for rapidly dissolving copper

Examples

Experimental program
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Embodiment 1

[0029] A method for rapidly dissolving copper, the steps are as follows:

[0030] (1) Cut the cathode copper or scrap copper into 100×100mm blocks, add it to the copper melting tank (copper melting tank φ2500×4000mm), add about 5 tons of copper, and the thickness of the material layer is about 1.0m, and then close the feeding port ;

[0031] (2) Turn on the circulation pump and add the solution to the copper-dissolving tank. The components of the solution are sulfuric acid, water and copper sulfate solution. The concentration of sulfuric acid is about 85g / L, and the concentration of Cu 2+ The concentration is about 10g / L, and the solution volume is 15m 3 ;

[0032] (3) Turn on the heating equipment and heat the solution to 50-60°C;

[0033] (4) Pass compressed air into the copper melting tank, the compressed air flow rate is 100m 3 / h, pressure: 0.25Mpa;

[0034] (5) Feed SO into the compressed air 2 , flow 4.5m 3 / h, pressure: 0.25Mpa;

[0035] (6) Dissolve for about ...

Embodiment 2

[0038] A method for rapidly dissolving copper, the steps are as follows:

[0039] (1) Add the copper wire to the copper melting tank, the diameter of the copper wire is φ1mm, the length is 600mm, the copper melting tank is φ2500×4000mm, the amount of addition is about 5 tons, the thickness of the material layer is about 1.5m, and then the feeding port is closed;

[0040] (2) Turn on the circulation pump and add the solution to the copper-dissolving tank. The components of the solution are sulfuric acid, water and copper sulfate solution. The concentration of sulfuric acid is about 85g / L, and the concentration of Cu 2+ The concentration is about 10g / L, and the solution volume is 14.5m 3 , replenish in time when the concentration of sulfuric acid in the solution is lower than 20g / L;

[0041] (3) Turn on the heating equipment, heat the solution to 50-60°C, and then stop heating;

[0042] (4) Pass compressed air into the copper melting tank, the compressed air flow rate is 120m ...

Embodiment 3

[0047] A method for rapidly dissolving copper, the steps are as follows:

[0048] (1) Add copper powder to the copper melting tank, powder D 50 70-100υm, the copper melting tank φ2500×4000mm, the amount added is about 3.5 tons, the thickness of the material layer is about 0.35m, and then the feeding port is closed;

[0049] (2) Turn on the circulation pump and add the solution to the copper-dissolving tank. The components of the solution are sulfuric acid, water and copper sulfate solution. The concentration of sulfuric acid is about 85g / L, and the concentration of Cu 2+ The concentration is about 10g / L, and the solution volume is 15.5m 3 , replenish in time when the concentration of sulfuric acid in the solution is lower than 20g / L;

[0050] (3) Turn on the heating equipment, heat the solution to 50-60°C, and then stop heating;

[0051] (4) Pass compressed air into the copper melting tank, the compressed air flow rate is 125m 3 / h, pressure: 0.25Mpa;

[0052] (5) Feed SO...

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Abstract

The invention discloses a method for rapidly dissolving copper. The method comprises the steps of adding solid copper to a copper dissolving tank through a copper material feeding inlet, wherein the material stacking thickness enables air to pass through smoothly; after the material is completely added, sealing the feeding inlet; starting a circulating pump, and adding a dissolving solution to thecopper dissolving tank 1 through a dissolving solution inlet; and starting heating equipment, heating the dissolving solution to 50-65 degrees centigrade, adding compressed air to the copper dissolving tank 1, adding an SO2 gas through an SO2 gas inlet, comprehensively adjusting reaction parameters, and dissolving copper rapidly to generate CuSO4. When the concentration of Cu<2+> in the solutionexceeds or is equal to 100 g / L, the reaction is stopped, Cu<2+> is discharged through a dissolving solution discharge port of the copper dissolving tank, the qualified copper sulfate solution is discharged through a dissolving solution outlet, and the exhaust gas is discharged through an air outlet. According to the method for rapidly dissolving copper disclosed by the invention, the copper dissolving rate is high, the utilization rate of oxygen in air reaches 80%, the inflated air amount is greatly reduced, the evaporation amount of the dissolving solution is reduced by about 30%, and the copper dissolving capacity can reach 800 kg / m<3>.d.

Description

technical field [0001] The invention belongs to the field of chemical industry, relates to the recovery and reuse of waste copper, in particular to a method for quickly dissolving copper. Background technique [0002] Dissolving copper is to turn solid copper into Cu 2+ , Dissolved in aqueous solution, widely used in copper sulfate preparation, copper foil production, waste copper recycling to prepare copper salt. Dissolved copper both at home and abroad uses air as the oxidant, and the air is filled into the solution during the production process, and then reacts with metallic copper. Using air (mainly oxygen in the air) as an oxidant has a low oxidation potential, only 400-500mV, slow copper dissolution, long reaction time, and low production efficiency. Contents of the invention [0003] Aiming at the above-mentioned problems existing in the existing copper dissolving process, the present invention provides a method for quickly dissolving copper, which shortens the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/10
Inventor 寇占伟曹笃盟马骞徐海虹吴婧李彬
Owner JINCHUAN GROUP LIMITED
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