JPS6029481A - Electrolytic recovering method of copper - Google Patents

Abstract

PURPOSE:To recover electrolytically and efficiently a copper-component by cutting a Pb alloy strip obtd. by a continuous casting method and electrolyzing an acidic soln. of a sulfuric acid contg. copper with a Pb alloy as anode. CONSTITUTION:A Pb alloy strip obtd. by a continuous casting method is cut to an anode shape and is used as a Pb anode for electrolyzing copper with an electrolytic recovering method of copper from an acidic soln. of a sulfuric acid contg. copper. Said Pb anode is cast in a reducing atmosphere to decrease inclusion of oxygen ad is formed by cutting to have a smooth surface and a uniform thickness. Said anode has high quality and high dimensional accuracy. The anode is therefore hung exactly in the stage of electrolysis and the specified space between the electrode surface is maintained. The migration of Pb to the cathode is decreased considerably, the efficiency of electrolysis is improved and further the life of the anode is extended, thus the copper-content is efficiently recovered.

Description

[Detailed description of the invention] This invention relates to a method for electrolytically recovering .

Conventionally, the recovery of electricity from sea bream from an acidic sulfuric acid solution containing copper requires
Generally, an insoluble 7-node of Pb gold alloy is used as a Pb manifold, and the anode plate is usually manufactured by a casting method in which a Pb or PB gold alloy solution is poured into a mold. However, one node, which is made by pouring metal into the mold one by one, not only has a slow casting speed, but also has one node.
There are many weight variations due to uneven thickness of each sheet, and there may be wrinkles on the anode surface during cooling, or #-type deterioration 1
There were many surface roughness such as wrinkles caused by ζ, and since the pouring into the M-type was open pouring, a large amount of oxygen was mixed in, making it difficult to obtain a high-quality anode.

In view of the above-mentioned problems of the conventional method, the present inventors aimed at improving the smoothness of the anode surface and improving the uniformity of the anode thickness.
When we attempted continuous casting of nodes, we discovered that the anodes produced by the method described in B exhibited a far longer lifespan than expected during the electrolytic recovery of copper, leading to the present invention. That is, according to the present invention [in the electrolytic recovery method of sea bream from a sulfuric acid acidic solution containing copper, a strip-shaped PB gold alloy obtained by continuous casting is cut into a one-node shape, and Ml! A method for recovering Nm characterized in that it can be used as a PB alloy for decomposition is provided.

Continuous casting equipment suitable for the present invention may be of the conventional type, in which the molten metal is poured from a tundish into a mold;
The PB gold alloy solidified after passing through the mold is pressed by pinch rolls, and further narrowed from above and below by levelers, and then cut into an anode shape by shearing. At this time, p was poured into the mold from Tanditshu.
Since the gold alloy b has a reducing atmosphere inside the mold and is closed until the molten metal solidifies, there is extremely little oxygen intrusion. In addition, the smoothness of the anode surface and the uniformity of the anode thickness are far superior to those of conventional stationary casting methods, so it can be accurately suspended in the electrolytic bath during electrolysis, and the spacing between the anode and cathode surfaces is also constant. As a result of the local current density being reduced, the migration of PB to the cathode is extremely reduced, and the electrolytic efficiency is also improved, and the overall effect is to extend the anode life. Ta. The manufacturing yield was also much improved compared to the stationary casting method.

Example 1: Pb is dissolved in a melting pot with a capacity of 5 tons, and Pb is added to the solution in a more specific manner.
After adding and melting 5 kg of Sn per 1000 kg of Pb at 340°C, the temperature was raised to 430±30°C, and the diameter was 3 mm.
A ceramic container with a large number of small pores (Ca shot) was placed in the solution at a concentration of 1.2 kg per 1000 kg of Pb, immersed in the solution, and stirred with Ar gas for 1 hour to dissolve.

(This method is based on the patent application filed in Japanese Patent Application Laid-Open No. 56-146).
The solution obtained in this way (based on the ``84Or alloy manufacturing method'') was passed through a kundish into a mold, rolled with solidified PB gold alloy first pinch rolls and second pinch rolls, and then rolled with a leveler from above and below to a thickness of 12 m.
m, and by shearing, one structure of 980 mm in length9
45 anode plates were manufactured by cutting into 60 mm anode shapes.

The composition of the obtained anode was: CaO, 12 times overheating, 5n
The balance of O05% by weight was pb. 45 anodes and 46 copper cathodes thus obtained were suspended in an acidic sulfuric acid solution containing copper, and a copper electrolytic recovery test was repeatedly conducted at a current density of 250 A/T11+.

For comparison, a conventional vertically mounted anode manufactured and the results of an electrolytic recovery test conducted using the same are listed in Table 1.

Applicant: Onahama Smelting Co., Ltd. Agent Toru Haginoya

Claims (1)

[Claims] In the electrolytic recovery method of copper from a sulfuric acid solution containing copper,
A method for electrolytic recovery of copper, characterized in that a strip-shaped PB gold alloy anode obtained by a continuous casting method is cut into strips and used as one node of a PB alloy for copper electrolysis.