Electrolysis method of polymetallic blister copper

A multi-metal and blister copper technology, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of high content of impurity elements, impossibility of electrolysis, anode passivation, etc., to reduce environmental pollution, shorten production cycle, cost reduction effect

Inactive Publication Date: 2009-03-25
SIHUI CITY HONGMING PRECIOUS METALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Blister copper containing a variety of metals, if electrolyzed by the above method, due to the high content of impurity elements, the anode is extremely passivated during electrolysis, and electrolysis cannot be carried out

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The raw material composition of polymetallic blister copper is as follows:

[0019] Copper 81%, Lead 5%, Antimony 6%, Bismuth 5%, Gold 500g / t, Silver 2.5%.

[0020] Follow the steps below:

[0021] ① Melt the blister copper raw material and cast it into a rectangular shape with ears, punch holes in the ears as anodes, and use copper plates as cathodes;

[0022] ② Preparation of electrolyte. Dissolve copper nitrate in water to make a 40 g / L copper nitrate solution, add nitric acid to the solution to make the concentration of nitric acid in the solution reach 25 g / L. Add sodium chloride to keep the chloride ion concentration at 2 g / L;

[0023] ③ Hang the anode into the electrolytic cell with a conductive metal hook (such as a copper hook), and add the electrolyte to the electrolytic cell;

[0024] ④ Turn on the electrolysis. Cathode current density 100A / m 2 , During the electrolysis process, maintain the concentration of copper nitrate, nitric acid and chloride ions...

Embodiment 2

[0027] The raw material composition of polymetallic blister copper is as follows:

[0028] Copper 72%, Lead 8%, Antimony 11%, Bismuth 5%, Gold 120g / t, Silver 4%.

[0029] Follow the steps below:

[0030] ① Melt the raw material and cast it into a rectangular shape with ears. Punch a hole in the ear shape as an anode, and use a copper plate as a cathode;

[0031] ② Preparation of electrolyte. Dissolve copper nitrate in water to make a 20 g / L copper nitrate solution, add nitric acid to the solution to make the concentration of nitric acid in the solution reach 10 g / L. Add sodium chloride to keep the chloride ion concentration at 9 g / L;

[0032] ③ Hang the anode into the electrolytic cell with a conductive metal hook (such as a copper hook), and add the electrolyte to the electrolytic cell;

[0033] ④ Turn on the electrolysis. Cathode current density 100A / m 2 , During the electrolysis process, maintain the concentration of copper nitrate, nitric acid and chloride ions in t...

Embodiment 3

[0036] The raw material composition of polymetallic blister copper is as follows:

[0037] Copper 98%, Lead 0.3%, Antimony 0.2%, Bismuth 0.5%, Gold 80g / t, Silver 1%.

[0038] Follow the steps below:

[0039] ① Melt the raw material and cast it into a rectangular shape with ears. Punch a hole in the ear shape as an anode, and use a stainless steel plate as a cathode;

[0040] ② Preparation of electrolyte. Dissolve copper nitrate in water to make a 170 g / L copper nitrate solution, and add nitric acid to the solution to make the concentration of nitric acid in the solution reach 30 g / L. Add sodium chloride to keep the chloride ion concentration at 1 g / L;

[0041] ③ Hang the anode into the electrolytic cell with a conductive metal hook (such as a copper hook), and add the electrolyte to the electrolytic cell;

[0042] ④ Turn on the electrolysis. Cathode current density 300A / m 2 , During the electrolysis process, maintain the concentration of copper nitrate, nitric acid and ...

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Abstract

The invention provides an electrolytic method of polymetallic raw copper. The method takes raw copper as an anode, a copper plate or stainless steel as a cathode and carries out electrolysis under the process conditions as follows: (1) the electrolytic solution contains 10g / l to 30g / l of nitric acid, 15g / l to 180g / l of cupric nitrate and the residual quantity of water, which form a cupric nitrate- nitric acid system which keeps the components of the electrolytic solution in the concentration range of the system during the electrolytic process; (2) salt chloride is added into the electrolytic solution and during the electrolytic process, the concentration of the chloride ion is kept between 1 to 10g / l; and (3) cathode current density 100A / m<2> to 300A / m<2>. During the electrolytic process, the method can loosen the anode sludge to cause the anode sludge to fall off automatically, thus overcoming the anodic passivity and the electrolytic process can be conducted smoothly. The method also has the advantages of lowering the cost for separating copper and other metal, shortening the production cycle and reducing environment pollution.

Description

technical field [0001] The invention relates to a method for directly electrolyzing blister copper containing various metals such as gold, silver, lead, antimony and bismuth to separate copper from other various metals. Background technique [0002] The traditional electrolysis method of copper is: use blister copper (containing more than 99.5% copper) as the anode, use copper sheet as the cathode, use copper sulfate-sulfuric acid as the electrolyte, electrolyze under the action of direct current, and the cathode produces cathode copper as Impurities such as gold, silver, lead, antimony, bismuth, etc. sink to the bottom of the pool in the form of anode slime and are then recycled. [0003] If the blister copper containing multiple metals is electrolyzed by the above method, the anode will be extremely passivated during electrolysis due to the high content of impurity elements, and the electrolysis cannot be carried out. Therefore, there are currently two main methods for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/12
CPCY02P10/20
Inventor 江继明江启明黄明黎旺兴
Owner SIHUI CITY HONGMING PRECIOUS METALS
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