JPS6380956A - Reusing method for anode residual plate in electrolytic process of non-ferrous smelting - Google Patents

Abstract

PURPOSE:To effectively use heat energy by setting an anode residual plate remaining in electrolytic stage, in a casting mold without melting it and next, casting the anode by pouring molten metal thereon. CONSTITUTION:The plural molds 12 are set on an upper surface of rotating casting disk 11, and also a lug part holding device 20, guide member 21, etc., are arranged. The anode residual plate S is set in the mold 12 at A point in the rotating casting disk 11 to fit the lug part holding device 20 providing the guide member 21. The molten metal is poured on the residual plate S at the A point and device 20 is guided by the guide member 21, to shift as the circular arc state and the formed anode is taken out by a pick-up machine 13 at B point. Only the other necessary quantity by the anode residual plate S may be melted by a converter and also under no melting of the residual plate S, it can be reused. Therefore, the heat energy is effectively used, and the production of anode is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for recycling anode residue generated from an electrolytic process of nonferrous metal smelting.

``Prior art'' For example, copper smelting involves preliminary treatment of copper ore - smelting in a reverberatory furnace - separation of glue and tangles in a reverberatory furnace - production of blister copper in a converter - purification of copper in an electrolytic tank It is carried out through each process.

Normally, in an electrolytic cell for metal refining, several dozen pairs of anodes and cathodes are arranged at regular intervals per electrolytic cell, and a current is passed between them to bring the crude metal on the anode side into the solution. While the metal is not melted, the metal dissolved in the solution is applied to the cathode and then irradiated to obtain a highly pure metal.

By the way, in the above electrolytic process, purification is usually not performed until all the anodes are melted.

This is because as electrolytic refining progresses, the anode becomes thinner and efficiency decreases, and when the anode becomes smaller than a predetermined size, the efficiency deteriorates and the cost of the product increases.

Conventionally, the anode residue remaining in the above electrolytic process is
The reality is that all materials are charged into a converter, melted, and then cast and reused.

``Problem that the problem is trying to solve'' However, in the conventional method of reusing anode residues as described above, all the anode residues are charged into the converter, so the anode residues are left in the converter. There was a problem that the amount of other scraps etc. to be processed decreased by the amount of scrap that was charged.

The present invention has been made to solve the above problems, and it is possible to reduce the amount of anode residue processed in the converter and increase the amount of other scrap, etc. to be melted,
Another object of the present invention is to provide a method for reusing anode residue in the electrolysis process of nonferrous metal smelting, which is also advantageous in terms of thermal energy.

"Means for Solving Problems" The method of the present invention is to set the anode residue remaining in the electrolytic process in an anode casting mold without melting it in a converter, and then pour molten metal over it to form an anode. It is characterized by casting.

"Operation" By using the method of the present invention, there is no need to dissolve all of the anode residue in a converter, and it is sufficient to dissolve only the required amount in the coolant in the converter.

Therefore, the amount of other scrap, etc. to be melted and processed in the converter increases. In addition, only the amount of anode residue required as a refrigerant for the converter is melted and used for re-Fl, while other anode residues are not melted and are used as solids for anode casting. This is advantageous in terms of thermal energy compared to the case where everything is melted.

"Example" Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIGS. 4 and 5 show general anodes used in the copper electrolytic refining process, and the solid line in the figures is a curved anode that is subjected to electrolysis immediately after being cast.

The anode 1 to be subjected to electrolysis is composed of a rectangular anode main body i'flE Ia and ears 1b%lb provided on both sides of its upper end.

Then, in this anode river, the anode main body 1a is immersed in the solution by supporting the ear 1b, and is subjected to electrolysis in this state. The electrolysis is carried out continuously and is stopped at an economically expedient point.

The shape of the anode at that time is shown by the two-dot chain line in the figure.

That is, in the anode residue S after being subjected to electrolysis, the central portion of the anode body portion 1a remains, and most of the ear portion 1b remains.

These anode residues S are taken out from the electrolytic solution, and a part of them is used as a coolant in the converter as in the past, while the remaining anode residues S are set in the mold I2 (Fig. 2). ), molten metal is poured over it to create a new anode.

1 to 3 show examples of casting anodes using the anode residue S described above.

What is shown in this example is an anode continuous casting device that can continuously cast anodes, and this device consists of a rotary casting plate 11
It has a plurality of molds 12 along the circumferential direction on the upper surface, and the work of pouring with a mermaid while rotating the rotary casting plate 11 as shown in (a) in the figure, and the casting product that is cooled and solidified during rotation. The operation of picking up a certain anode I at point B by the pick-up machine 13 is performed in synchronization with the rotation of the rotary casting plate II, thereby casting the anodes I continuously.

The anode residue S is a mermaid and is set in a mold 12 on a rotary casting machine ll. At this time, anode residue S
Since most of the ear portion 1b remains as described above, there is an advantage that it can be easily set into the mold 12.

In addition, when casting is performed while leaving the anode residue S as it is, when pouring the molten metal from above the set anode residue S, the anode main body 1a is pressed by the flow of the molten metal, causing the ear part 1b to lift up. occurs. In order to prevent this phenomenon, the above device is equipped with an ear pressing device 20.

The ear holding device 20 moves in an arc shape integrally with the anode residue S set in the mold 12 guided by an arc-shaped guide member 2I arranged outside the point Δ of the rotary casting plate 11. , gah, press arm 2 that can freely move up and down
2, this pressing arm 22 is lowered at the pouring point A and presses the ear part 1b of the anode residue Jl&s that has been deposited in the mold 12, and in this pressed state, the anode residue S and F moves integrally in an arc shape, and when pouring is finished, the suppression arm 22 is raised and returned to its original position along the guide member 21.

Further, as shown in FIGS. 4 and 5, the anode residue S set in the mold 12 is provided with a 19-hole hole 1c so as to pass through the anode main body 1a. This hole 1
By c, it is possible to avoid the formation of air pockets on the back side of the anode residue S when setting the anode residue S in the mold 12 and pouring the molten metal into the mold 12. It can be quickly wrapped around the back side of the basic body.

Note that when the mold 12 used for casting the anode is used many times, the mold surface becomes rough, so it must be replaced periodically with a new mold. When casting a new mold, TRR copper is cast in the same way as when casting an anode, so when casting this mold, it is also possible to perform residue treatment by putting anode residue into the mold. In addition, if this is done, refined copper equivalent to the amount of residue input can be used for anode casting, and the production of anodes can be increased.

In addition, in the above embodiment, the present invention was explained using the case of smelting copper as an example, but the present invention is not limited to copper.
It is of course applicable to other non-ferrous metals subjected to electrolytic refining.

"Effects of the Invention" As explained above, according to the present invention, the anode residue remaining in the electrolytic process is set in the anode casting mold 1ζ without being melted in the converter, and the molten metal is poured from the mold 1ζ. Since the anode is cast by pouring, there is no need to melt all of the anode residue in a converter, and it is sufficient to melt only the amount required for the four components in the converter. Therefore, the amount of melting process of other scrap etc. in the converter increases. In addition, only the amount of anode residue required for the converter's four components is melted and reused, and other anode residues are not melted and are submitted to anode casting as solids for reuse. Compared to the case where all the anode residue was melted, it should produce benefits such as being more advantageous in terms of thermal energy.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of casting an anode according to the present invention, FIG. 2 is an enlarged view of the circle part in FIG. 1, and FIG. 3 is a cross-sectional view taken along line n'i - + n in FIG. , Figure 4 shows the anode 1
The L-side view and FIG. 5 are cross-sectional views taken along the v-v line in FIG. 4. 1...Anode, 1a...Anode main body, 1b
..., anode ear part, II... rotary casting machine, 12
...Mold, 20...Ear holding device, 2...Guide i! I(+o, 22...
Slapping arm, S...anode residue.

Claims (1)

[Claims] Electrolysis for nonferrous metal smelting, characterized in that the anode residue remaining in the electrolysis process of nonferrous metal smelting is set in an anode casting mold without being melted, and molten metal is poured over the mold to cast an anode. A method for reusing anode residues in a process.