TWI388673B - And then recycling raw materials processing methods - Google Patents

Description

Recycling raw material processing method

The present invention relates to a method for treating a powdery, granular and/or 100 mm square or less foil-like reclaimed raw material which can be recovered in a copper refining process and is less than 30 mmφ.

Powdered or granular gold (Au), silver (Ag), platinum (Pt), and palladium (Pd) noble metals are easily moved in the molten copper (Cu). Therefore, a powdery, granular or 100 mm square or less foil-like reclaimed raw material of 30 mmφ or less is charged into a converter, and after being taken out at the anode, it is separated from Cu and recovered as a precipitate during electrolytic refining. .

In the past, such raw materials were loaded into a converter boat using a skid rig and loaded into a converter. In this case, the powdery, granular or less than 100 mm square or less of the foil-like reclaimed material of 30 mm Φ or less is easily scattered due to the light weight, and thus there is a problem that the loading is carried out in a converter boat using a shovel loader, and the converter is loaded. At the time of the converter and the air supply period of the converter, it is easy to fly. Therefore, in the flash furnace process of the process before the recovery rate is reduced, the raw materials to be scattered must be recycled by human resources for treatment.

Further, Patent Document 1 discloses a technique in which a powdery material is made into a solid and directly charged into a converter.

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-181747

In the method for treating a powdered copper scrap into a solid disclosed in Patent Document 1, the powdered copper scrap is compression-molded to form a briquettes, and is then charged into a converter, so that the treatment can be carried out without powder. The condition that the copper scrap is scattered in the exhaust gas of the converter. However, if the particle size of the copper scrap exceeds 10 mm, the formability deteriorates, and therefore it is necessary to perform an operation of sieving and distinguishing.

Although it is considered that the granular material having a particle diameter of more than 10 mm is not formed into a briquettes, it is directly loaded into a converter boat and then loaded into a converter, but in this case, it is sometimes loaded. When the converter is used in a boat or when it is loaded into a converter, scattering occurs, and the recovery operation becomes complicated. Further, in the treatment method of Patent Document 1, it is not assumed that a raw material such as a non-powder or granular material such as a foil-shaped metal piece is treated.

Therefore, an object of the present invention is to charge a powdery, granular, and/or 100 mm square or less foil-like recycled raw material of 30 mmφ or less into a converter without scattering.

The method for treating a reclaimed raw material of the present invention which solves the problem is characterized in that it has a process of arranging copper waste around a powdery, granular, and/or 100 mm square or less foil-like recycled raw material having a mass of 30 mmφ or less. And molding the molded product by pressing; the molded product is placed in a converter boat and then loaded into a converter; and the molded product is melted in the converter to obtain the recycled material. The crude copper of the valuable substance in the middle; and the valuable substance in the above-mentioned recycled raw material which is the precipitate in the electrolytic refining of the above crude copper.

The copper scrap is disposed around the powdery, granular, and/or 100 mm square or less foil-like recycled raw material of 30 mmφ or less, and is subjected to a pressing treatment, whereby the raw material shown above is wrapped with copper scrap. Thereby, it is possible to prevent the scattering of the above-described raw materials caused by the loading in the converter boat and the gas ejection at the time of the converter charging. As a result, the recovery efficiency of the raw materials shown above can be improved. Moreover, by adopting such a method, since it is not necessary to add a special configuration to the converter, it is possible to suppress an increase in size of the apparatus. Further, the powdery raw material can be further suppressed from scattering by the simple method of being enclosed in the bag.

Further, the molded article may be formed by incorporating copper scrap into the lower layer portion of the press-formed container, and filling the powdery, granular, and/or 100 mm of the above-mentioned 30 mmΦ or less in the center portion of the intermediate layer. In the foil-like re-recycling raw material of the following side, the copper scrap is placed in the upper layer, and the above-mentioned recycled raw material is coated and subjected to a pressing treatment.

In the present invention, copper scrap is placed around a powdery, granular, and/or 100 mm square or less foil-like recycled raw material of 30 mmφ or less and subjected to a pressing treatment, whereby the raw material shown above is wrapped with copper scrap. Thereby, it is possible to suppress the scattering of the above-described raw materials in the loading of the converter boat, the loading in the converter, and the converter blowing period.

Hereinafter, the best mode for carrying out the invention will be described in detail together with the drawings.

[Examples]

Embodiment 1 of the present invention will be described with reference to the drawings. Fig. 1 is a flow chart showing an example of the process of the method for treating a recycled raw material of the present invention.

In the process of the step S1, the powdery or granular re-recycled raw material of 30 mmφ or less is sealed in the bag body. In other words, a powdery or granular reconstituted raw material having a size of 30 mm or less is formed into a briquette shape. The powdery or granular reclaimed raw material of 30 mmΦ or less is a PGM (Platinum Group Metals) raw material containing about 1% of Pt, and a residue obtained by calcining a gold-silver residue with a resin. The particle size of such recycled raw materials is about 30 mm or less.

In the process of the step S2, the raw material is subjected to a pressing treatment to form a molded product. Specifically, a copper scrap (copper scrap such as a waste electric wire, a substrate, and a machining scrap) and a bag in which the powder is reclaimed in the step S1 are loaded into the press 1 and formed into a re-recycling by press treatment. Shaped material 13 of raw material. Hereinafter, the processing of step S2 will be described in detail.

First, the press 1 for performing press forming will be described. 2 and 3 are explanatory views showing the press 1 used in the press processing of the present invention. Fig. 2 shows the press 1 when it is not pressed, Fig. 2(a) is a front view thereof, and Fig. 2(b) is a side view thereof. Fig. 3 is a front view showing the press 1 at the time of pressing.

The press machine 1 is provided with a press-formed container 2, an upper cover 3, an upper cover piston 4, and a main piston 5. The press-formed container 2 is a container filled with a material to be subjected to press forming, and has a volume of W800 mm × H800 mm × L2450 mm.

The upper cover 3 is a cover that presses the raw material in the press-formed container 2. The upper cover 3 is provided to be rotatable around the support portion 31. The top end side of the upper cover piston 4 is connected to the upper cover 3, and the upper cover 3 is moved in the closing direction by the upper cover piston 4. The upper cover piston 4 is housed in the upper cover hydraulic cylinder 6 when it is not pressed. At this time, the upper cover 3 is in an open state as shown in FIG. Further, the upper cover hydraulic cylinder 6 is connected to the compressor 8 by the oil pipe 9 for oil passage. When the oil is sent to the upper cover hydraulic cylinder 6 by the compressor 8, the upper cover piston 4 is closed as shown in FIG.

The main piston 5 is disposed such that the pressurizing portion 51 faces the press-formed container 2 side. The sliding portion of the main piston 5 is housed in the main hydraulic cylinder 7 when it is not pressed. The main hydraulic cylinder 7 is connected to the compressor 8 by an oil pipe 10 for oil passage. When the oil is sent to the main hydraulic cylinder 7 by the compressor 8, the pressurizing portion 51 of the main piston 5 is pressed by the press forming container 2 side as shown in Fig. 3 . As described above, when the pressurizing portion 51 is pressed by the press-formed container 2 side, the raw material charged into the press-formed container 2 is compressed.

The main piston 5 of the press 1 can compress the material in the press-formed container 2 at a pressing pressure of 70 to 210 (kgf/cm ² ). Moreover, the shape of the molded object formed by the press processing of the press machine 1 is a cubic shape of W800 mm × H800 mm × pressed length L. The pressing length L can be freely adjusted by the amount of raw material input. Furthermore, the pressing length L is at most 2000 mm.

When the press 1 is subjected to the pressing treatment, the upper cover 3 is closed, the main piston 5 is pressed on the side of the press-formed container 2, and the material in the press-formed container 2 is subjected to a pressing treatment. The molded article formed by the press treatment is taken out to the outside of the press machine 1 by opening the side cover 21 provided at the end of the press-formed container 2.

Next, the process of the press treatment performed by the press machine 1 will be described. Fig. 4 is an explanatory view schematically showing a state from the loading of the raw material in the press 1 to press forming. Here, the process is performed in the order of FIG. 4(b), FIG. 4(c), FIG. 4(d), and FIG. 4(e) from FIG. 4(a).

First, the loading of the raw materials in the press-formed container 2 of the press machine 1 will be described. As shown in Fig. 4 (a), copper scrap is loaded in the press loading vessel 11. Then, as shown in Fig. 4 (b), in the upper portion and the central portion of the copper scrap loaded in the boat 11 for loading into the press, the powdery or granular reclaimed raw material having a size of 30 mm or less is sealed in step S1. The bag body 12a. Next, as shown in FIG. 4(c), copper scrap is loaded to cover the bag body 12a. At this time, in the press-loading boat 11, the bag body 12a is covered with copper scrap. The raw material loaded in the press-loading boat 11 is loaded into the press-formed container 2 as shown in Fig. 4 (d).

After the raw material is charged into the press-formed container 2, the raw material charged into the press-formed container 2 is subjected to press forming as shown in Fig. 4(e). Thereby, the molded product 13 containing the recycled raw material is formed. The molded product 13 containing the reclaimed raw material has a configuration in which a powdery or granular reclaimed raw material having a mass of 30 mm Φ or less is placed inside, and copper scrap is disposed around the pelletized material. In this way, the powdery or granular re-recycled raw material of 30 mmφ or less is wrapped by the copper scrap, so that the recycled raw material can be prevented from scattering around in the subsequent process.

Further, the raw materials loaded in the press-loading boat 11 are loaded with a total weight of 0.6 to 0.7 t each time, and the PGM raw material is about 20 kg (about 3%), and the resin is filled with gold and silver slag. The residue is composed of a mixing ratio of about 30 kg (about 5%).

As described above, in the process of the step S2, the molded product 13 containing the recycled raw material is formed. As shown in FIG. 1, after the process of step S2, the process of step S3 is followed. In the process of the step S3, the molded product 13 containing the recycled raw material is charged into the converter boat 14.

Further, before the process of the step S3, the copper scrap molded article 15 obtained by subjecting the copper scrap to a press treatment in advance is formed in addition to the process of the step S2. The forming process of the copper scrap molded article 15 is carried out by press forming using a press 1.

FIG. 5 is an explanatory view showing a state in which a molded article obtained by press molding using a press machine 1 is placed in a boat 14 for a converter. As shown in Fig. 5, four molded articles were placed in the converter boat 14. In the four molded articles placed in the converter boat 14, the inner two pieces are the molded product 13 containing the recycled raw material, and the outer two blocks are the copper scrap molded product 15. Thereby, the load imbalance of the molded product 13 containing the recycled raw material is prevented.

After the process of step S3 is completed, the process of step S4 is performed. In the process of the step S4, the molded articles 13, 15 loaded into the converter boat 14 in the process of the step S3 are loaded into the converter 16. Fig. 6 is an explanatory view showing this state. At this time, the powdery or granular re-recycled raw material of 30 mm Φ or less in the molded product 13 containing the recovered raw material is wrapped by the copper scrap, so that the scattering of the powder raw material can be suppressed.

After the process of step S4 is completed, the converter smelting is carried out in the process of step S5 to obtain blister copper containing the recycled raw material. Next, in the process of step S6, the crude copper containing the recycled raw material obtained in the process of step S5 is subjected to electrolytic treatment. When copper is refined by electrolytic treatment, the recovered raw material as a precipitate is taken out and recovered.

The operation system for charging the molded product loaded into the converter boat 14 into the converter is carried out 40 to 64 times per day. Therefore, the molded product 13 containing the powder raw material is formed into about 80 to 128 pieces per day.

Further, in the above embodiment, the recycled raw material may be a foil of 100 mm square or less. In the processing flow at this time, the process of step S1 shown in FIG. 1 is omitted, and the process is started from the process of step S2. FIG. 7 is an explanatory view schematically showing a state in which the foil-shaped reclaimed raw material 12b of 100 mm square or less is subjected to a pressing treatment. Here, the process is performed in the order of FIG. 7(b), FIG. 7(c), FIG. 7(d), and FIG. 7(e) from FIG. 7(a). As shown in Fig. 7 (b), the foil-shaped reclaimed raw material 12b of 100 mm square or less can be directly disposed on the upper side and the central portion of the copper scrap loaded in the press-loading boat 11 . As shown in FIGS. 7(c) and 7(d), the copper scrap is loaded and the foil-shaped reclaimed raw material 12b of 100 mm square or less is coated and placed in the press-formed container 2. Next, as shown in FIG. 4(e), the raw material charged into the press-formed container 2 is subjected to press forming. In addition, the other structure is the same as the processing method of the bag body 12a in which the powdery or granular reconstituted raw material of 30 mmΦ or less is enclosed, and the detailed description is abbreviate|omitted.

In addition, it is also possible to carry out the method of wrapping the bag-shaped material 12a of the powdery or granular re-consumed material of 30 mm Φ or less and the foil-like reclaiming raw material 12b of 100 mm square or less in the form of a clump of copper scrap. The press treatment is carried out to form a molded product 13 containing a recycled raw material. FIG. 8 is a view schematically showing a state in which both the bag body 12a in which the powdery or granular reconstituted raw material having a mass of 30 mmφ or less in agglomerate shape is sealed and the foil-shaped reclaimed raw material 12b of 100 mm square or less are subjected to a pressing treatment. Illustrating. Here, the process is performed in the order of FIG. 8(b), FIG. 8(c), FIG. 8(d), and FIG. 8(e) from FIG. 8(a). In addition, since the other structure is the same as the above, detailed description is abbreviate|omitted.

Further, in the above embodiment, the raw material is loaded into the press-loading boat 11 and then loaded into the press-formed container 2 of the press 1, but the raw material may be directly loaded into the press-formed container. 2 in. At this time, copper scrap is placed in the lower layer portion of the press-formed container 2, and a bag body 12a in which a powdery or granular reclaimed raw material having a mass of 30 mmφ or less is encapsulated in a bulk form is placed in the center portion of the middle layer to be coated. The bag body 12a is loaded with copper scrap in the upper portion. That is, copper scrap is disposed around the powdery or granular reclaimed raw material of 30 mmφ or less. The molded product 13 containing the recycled raw material is formed by subjecting the raw material loaded in this manner to a pressing treatment. Thereby, since the powder raw material is wrapped by the copper scrap, the scattering of the powder raw material can be suppressed at the time of loading in a converter or the like. In this case, the material disposed in the central portion of the middle layer may be a foil-shaped reclaimed raw material 12b of 100 mm square or less, or may be a bag body 12a and 100 mm in which a powdery or granular reclaimed raw material of 30 mmφ or less is sealed. See the following foil-like recycling materials 12b.

In the above method, the powdery, granular, and/or 100 mm square or less foil-like reclaimed raw material processing method of the present invention is packaged by copper scrap, so that it can be loaded in a converter boat, and the converter can be used. The scattering of the reclaimed raw materials shown above is suppressed at the time of loading and during the blowing of the converter. Further, by suppressing the scattering of the reclaimed raw material as described above, it is possible to recover the reclaimed raw material which has been scattered in the prior art, so that the recovery rate of the recycled raw material is improved.

1‧‧‧ Press

2‧‧‧ Pressed forming containers

3‧‧‧Upper cover

4‧‧‧Capped piston

5‧‧‧Main piston

11‧‧‧The press is loaded into the boat

12a‧‧‧ enclosed with 30 mm The following powdery, granular reclaimed material

12b‧‧100mm square below the foil recycling material

13‧‧‧Forms containing recycled raw materials

14‧‧‧Conveyor boat

15‧‧‧ Copper scrap forming

16‧‧‧ converter

Fig. 1 is a flow chart showing a process example of a powdery, granular, and/or 100 mm square or less foil-like reclaimed raw material processing method of 30 mmφ or less.

Fig. 2 is an explanatory view showing a press used for the press treatment, and (a) is a front view of the press when not pressed, and (b) is a side view of the press when it is not pressed.

Fig. 3 is an explanatory view showing a press used for the press processing, and is a front view showing the press at the time of pressing.

FIG. 4 is a view schematically showing a state in which the bag body 12a in which the powdery or granular reclaimed raw material having a size of 30 mmφ or less is sealed is placed in a press until press molding.

Fig. 5 is an explanatory view showing a state in which a press-molded article is placed in a boat for a converter.

Fig. 6 is an explanatory view showing a state in which a press-molded article loaded in a boat for a converter is charged into a converter.

FIG. 7 is an explanatory view showing a state in which a foil-shaped reclaimed raw material 12b of 100 mm square or less is placed in a press until press forming.

FIG. 8 is a view schematically showing a state in which a bag body 12a in which a powdery or granular reclaimed raw material having a size of 30 mmφ or less is sealed and a foil-shaped reclaimed raw material 12b of 100 mm square or less is placed in a press machine. Illustrating.

S1 ~ S6. . . step

Claims (2)

A method for reprocessing raw materials having the following process: 30 mm in agglomerate form The following copper powder waste is disposed around the powdery, granular, and/or foil-shaped recycled raw materials of 100 mm square or less, and a shaped product containing the recycled raw material is formed by pressing treatment; only the copper scrap is subjected to pressing treatment. Forming a copper scrap molded product; clamping the molded product containing the recycled raw material into the converter boat by the copper scrap molding, and loading it into the converter; and melting the molded product in the converter, borrowing This obtains crude copper containing the valuable substance in the recycled raw material; and recovers the valuable substance in the recycled raw material as the precipitate in the electrolytic purification of the crude copper. The method for processing a recycled raw material according to the first aspect of the invention, wherein the formed product containing the recycled raw material is formed by: loading copper waste into a lower layer of the press-formed container; loading the central portion of the middle layer Agglomerate 30 mm The following powdery, granular, and/or foil-like reclaimed raw materials of 100 mm square or less; copper scraps are placed in the upper layer to cover the recycled raw materials, and subjected to pressing treatment.