KR101931520B1 - Concentrating method of precious metal by adjusting the composition of an collecting alloy - Google Patents

Abstract

One embodiment of the present invention is directed to a method of manufacturing a metal alloy comprising the steps of: (1) adjusting the iron content of an alloy comprising a noble metal; An anode composed of the iron content controlled alloy; Cathode; And performing an electrolytic dissolution with the electrolyte (step 2); And recovering the anode slime produced by the electrolytic dissolution (step 3). The present invention also provides a method for concentrating a noble metal by controlling an alloy composition.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for concentrating precious metals by controlling the composition of alloys,

The present invention relates to a method for concentrating a noble metal by controlling the composition of an alloy, and more particularly, to a method of concentrating a noble metal by controlling iron content and electrolytic dissolution of a copper alloy containing a noble metal.

In the field of recycling of precious metals, recycled materials include, for example, an alloy containing a noble metal, an alloy phase in which a noble metal is obtained by melting a waste containing a noble metal at high temperature, and the like. When these are recycled, the main metal and noble metal of the alloy are recovered separately. At this time, the electrolytic leaching technique of leaching using the alloy as the anode can be applied. Examples of the target alloy include a noble metal-containing heat resistant alloy, a noble metal-containing copper alloy obtained by subjecting a waste printed circuit board to high temperature melting treatment, and the like.

Korean Patent Laid-Open Publication No. 10-2012-0133414 discloses a method for producing a pyrolysis product by decomposing a polymer component by an oxygen-free heating process of a waste portable device to form a pyrolysis product, separating the metal casing from the pyrolysis product by a magnet, Forming an anode for electrolytic dissolution by melting and casting the electrode material for recovering a valuable metal; electrolytically dissolving nickel in the anode for electrolytic dissolution so as to dissolve the electrolytic solution to form a nickel-containing electrolytic solution in which nickel is concentrated; And a step of separating and recovering nickel by purifying the nickel-containing electrolytic solution. Also disclosed is a method for recovering not only nickel but also valuable metals such as gold and silver from various portable devices that have been discarded.

During the electrolytic dissolution of the alloy, the noble metal is not dissolved but remains as an anode slime. At this time, the concentration of the noble metal in the anode slime must be higher than the noble metal content in the alloy, and the concentration of the noble metal in the anode slime must be increased. Making it more economical and efficient.

Korean Patent Publication No. 10-2012-0133414

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a method for manufacturing a waste printed circuit board, which is capable of improving the concentration ratio of a noble metal such as a noble metal- And a method for concentrating the noble metal by controlling the composition.

In order to accomplish the above object, one aspect of the present invention is a method of manufacturing a semiconductor device, comprising: (1) controlling an iron content of an alloy containing a noble metal; An anode composed of the iron content controlled alloy; Cathode; And performing an electrolytic dissolution with the electrolyte (step 2); And recovering the anode slime produced by the electrolytic dissolution (step 3). The present invention also provides a method for concentrating a noble metal by controlling an alloy composition.

In one embodiment, the noble metal may be one selected from the group consisting of gold (Au), silver (Ag), and combinations thereof.

In one embodiment, the alloy of step 1 is selected from the group consisting of Cu, Sn, Au, Ag, Fe, Ni, Pd, ). ≪ / RTI >

In one embodiment, the iron content of step 1 may be controlled to contain from 1.0 wt% to 12.0 wt% of iron relative to the alloy.

In one embodiment, the electrolytic dissolution of step 2 comprises an anode consisting of the iron content controlled alloy; And a cathode (step a); And applying current to the cathode and the anode in the electrolyte (step b); . ≪ / RTI >

In one embodiment, the electrolytic dissolution of step 2 may consist of one kind of the cathode selected from the group consisting of copper, stainless steel, titanium, and combinations thereof.

In one embodiment, the electrolytic dissolution of step 2 may be performed with a separator surrounding the anode at a predetermined interval.

In one embodiment, the electrolyte of step 2 comprises sulfuric acid or copper sulfate, and the concentration of sulfuric acid or copper sulfate may be 0.3 M to 2.0 M.

In one embodiment, the electrolytic dissolution of step 2 may be carried out at a temperature of from 40 캜 to 80 캜.

In one embodiment, the electrolytic dissolution of step 2 may be performed so that the anode current density is 10 mA / cm 2 to 30 mA / cm 2.

In one embodiment, the anode slime of step 3 may comprise 4.0 wt% to 9.0 wt% of the noble metal relative to the anode slime.

In order to achieve the above object, another aspect of the present invention is to provide a method of manufacturing a honeycomb structure, which comprises 4.0 to 9 wt% of noble metal, which is prepared through the above-described method (step 1 to step 3) Thereby providing an anode slime.

In order to achieve the above object, another aspect of the present invention provides a method of manufacturing a semiconductor device, comprising: From 5.0 wt% to 10.0 wt% of iron; 0.1 to 2.0 wt% of gold or silver; And an amount of the remaining copper and unavoidable impurities. The present invention also provides an alloy for concentrating precious metals through electrolytic dissolution.

In one embodiment, the noble metal concentration alloy comprises 6.0 wt% to 17.0 wt% tin; From 5.0 wt% to 10.0 wt% of iron; 0.1 wt% to 2.0 wt% of gold; 0.1 wt% to 2.0 wt%; Residual copper and unavoidable impurity levels.

According to one aspect of the present invention, by controlling the iron content of a noble metal-containing alloy composed of an anode, it is possible to suppress distribution of the components other than the noble metal to the anode slime in the course of electrochemical dissolution of the components constituting the alloy, And the concentration of the noble metal in the finally obtained anode slime can be improved to 500% to 850% of the initial anode alloy (100%).

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

1 is a flowchart showing an example of a noble metal concentration method by controlling an alloy composition according to an embodiment of the present invention.
FIG. 2 is a flowchart showing another example of a noble metal concentration method by controlling an alloy composition according to an embodiment of the present invention.
3 is a graph showing distribution (%) of copper in Experimental Examples 1 to 5 of the present invention.
4 is a graph showing distribution (%) of tin in Experimental Examples 1 to 5 of the present invention.
5 is a graph showing distribution (%) of iron in Experimental Examples 1 to 5 of the present invention.
6 is a graph showing distribution (%) of gold in Experimental Examples 1 to 5 of the present invention.
7 is a graph showing distribution (%) of silver in Experimental Examples 1 to 5 of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving it will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings.

It should be understood, however, that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. To fully inform the inventor of the category of invention. Further, the present invention is only defined by the scope of the claims.

Further, in the following description of the present invention, if it is determined that related arts or the like may obscure the gist of the present invention, detailed description thereof will be omitted.

In the case of a copper alloy containing a noble metal obtained by melting a substrate (PCB) at a high temperature by a conventional waste printing press, the concentration through electrolytic dissolution can be about 400%. This is calculated by assuming that the concentration of noble metal on the raw alloy is 100%.

According to one aspect of the present invention to be described later, the method of concentrating a noble metal by controlling the composition of an alloy may intentionally control the composition of the alloy so that the noble metal concentration ratio may reach 500% to 850%.

According to an aspect of the present invention,

Adjusting the iron content of the alloy including the noble metal (step 1) (S10);

An anode composed of the iron content controlled alloy; Cathode; And performing electrolytic dissolution with the electrolyte (step 2) (S20); And

And recovering the anode slime produced by the electrolytic dissolution (step 3) (S30). The present invention provides a method for concentrating a noble metal by controlling an alloy composition.

Hereinafter, the noble metal concentration method by controlling the alloy composition according to one aspect of the present invention will be described in detail for each step.

In the method for concentrating the noble metal by controlling the alloy composition according to an aspect of the present invention, the step 1 (S10) controls the iron content of the noble metal-containing alloy.

The alloy containing the noble metal in step 1 may be an alloy in which a noble metal obtained by subjecting a waste containing a noble metal to high-temperature melting treatment is collected. More specifically, a noble metal-containing copper Alloy.

The noble metal may be one selected from the group consisting of gold (Au), silver (Ag), and combinations thereof.

The alloy including the noble metal of the step 1 may be at least one selected from the group consisting of Cu, Sn, Au, Ag, Fe, Ni, Pd, And at least one selected from the group consisting of

The iron content of the step 1 may be controlled to contain iron in an amount of 1.0 wt% to 12.0 wt% based on the alloy, and may preferably be performed to contain iron in an amount of 1.3 wt% to 10.0 wt% , More preferably from 5.1 wt% to 10.0 wt% of iron relative to the alloy. If the iron content in step 1 is controlled to be less than 1.0 wt% based on the alloy, the components other than the noble metal are distributed to the anode slime in the following electrolytic dissolution step, and the concentration ratio of the noble metal may significantly decrease. If the Fe content is more than 12.0 wt% based on the alloy, there is a possibility that the concentration of the noble metal in the electrolytic dissolution step may be lowered due to the effect of precipitation of iron on the alloy.

As an example of the alloy composition of the step 1,

Tin 2.5 wt% to 20 wt%;

From 1.0 wt% to 12.0 wt% of iron;

0.1 to 2.0 wt% of gold or silver; And

The balance of the remaining copper and unavoidable impurities, and more preferably,

From 6.0 wt% to 17.0 wt% tin;

From 5.0 wt% to 10.0 wt% of iron;

0.1 wt% to 2.0 wt% of gold;

0.1 wt% to 2.0 wt%; And

Remaining copper, and remaining inevitable impurities.

In the electrolytic dissolution step described below, the iron content of the step 1 is controlled so as to suppress the distribution of the components other than the noble metal to the anode slime during the electrochemical dissolution of the components constituting the alloy, And the like. In addition, iron nickel, cobalt, to be delivered dissolved in the electrolyte over a wide pH range in the potential increase of the dissolution during the anode ions phase comparison or the like of copper, without forming the anode slime, wherein generating iron ions (Fe ^{3 +)} that is The base metal can act as an oxidizing agent to promote dissolution.

The iron content-adjusted alloy of step 1 may be prepared, for example, by adding an iron component to a noble metal-containing alloy in an amount of 1.0 wt% to 12.0 wt% based on the alloy and then melting the alloy at a temperature of 1500 ° C to 1600 ° C to prepare a melt , Injecting the molten metal into the graphite mold, and then keeping the molten metal for 10 to 30 minutes and cooling.

Before injecting the molten metal into the mold, the mold may be preheated to a temperature of 250 ° C to 400 ° C for 1 hour to 2 hours to minimize segregation.

According to an aspect of the present invention, there is provided a method of concentrating a noble metal by controlling an alloy composition, wherein the step 2 (S20) comprises an anode composed of the iron content-controlled alloy; Cathode; And electrolytic dissolution with an electrolyte.

Wherein the electrolytic dissolution of step 2 comprises an anode consisting of the iron content controlled alloy; And a cathode (step a) (S21); And

And applying a current to the cathode and the anode in the electrolyte (step b) (S22).

The cathode may be made of copper, stainless steel, titanium, or the like, but is not limited thereto.

The electrolytic dissolution of step 2 may be performed by providing a separation membrane that surrounds the anode at predetermined intervals.

The separation membrane may be specifically polypropylene, polyethylene, or the like, but is not limited thereto.

The separation membrane facilitates the recovery of the deposited anode slime during the electrolytic dissolution and does not affect the electrodeposition of the ionized metal on the cathode.

The electrolyte in step 2 may be a solution containing sulfuric acid or copper sulfate, and the concentration of sulfuric acid or copper sulfate in the electrolyte may be 0.3 M to 2.0 M, preferably 0.5 M to 1.5 M. When the concentration of sulfuric acid or copper sulfate in the electrolyte is less than 0.3 M, the leaching reaction through electrolytic dissolution may be deteriorated. When the concentration of sulfuric acid or copper sulfate in the electrolyte is more than 2.0 M, the viscosity of the electrolyte is increased and the electrochemical reactivity is lowered, There may arise a problem that the electrolytic dissolution reactivity of the anode is lowered due to the high copper ion concentration.

The electrolytic dissolution in step b of step 2 above may be carried out at a temperature of 40 ° C to 80 ° C. When the electrolytic dissolution is carried out at a temperature lower than 40 ° C, there is a possibility that the leaching reaction through electrolytic dissolution is lowered. When the electrolytic dissolution is carried out at a temperature higher than 80 ° C, the anode current density and the sulfuric acid concentration There may arise a problem in which the temperature of the gas is increased.

In step b of the step 2, the electrolytic dissolution may be performed so that the anode current density is 10 mA / cm 2 to 30 mA / cm 2, preferably 15 mA / cm 2 to 25 mA / cm 2. If the anode current density is less than 10 mA / cm < 2 >, there may occur a problem that the rate of formation of the anode slime in which the noble metal is concentrated decreases. If the anode current density exceeds 30 mA / cm & The anode melting reaction may be stopped.

The anode slime can be formed on the surface and the lower surface of the anode through the electrolytic dissolution of step 2, and copper among the components that can be contained in the anode is electrodeposited on the cathode in an amount of 90% by weight to 99% by weight based on the copper dissolved in the anode .

In the electrolytic solution of step 2, tin among the components that can be contained in the anode may be distributed to the anode slurry in an amount of 85 wt% to 99 wt% based on the tin separated from the anode.

In the electrolytic melting furnace of step 2, iron contained in the anode may be distributed in an amount of 2.0 wt% to 5.0 wt% based on the iron separated from the anode into the anode slime, and the remaining amount may be dissolved in the electrolyte.

In the electrolytic melting furnace of step 2, the noble metal among the components that can be contained in the anode may be distributed in an amount of 98.0 wt% to 99.9 wt% with respect to the noble metal separated from the anode.

The electrolytic dissolution of step 2 above may have an energy consumption of 0.45 kWh / kg to 0.65 kWh / kg per kg of the anode.

In the noble metal concentration method according to one aspect of the present invention, the step 3 (S30) recovers the anode slime produced by the electrolytic dissolution.

The anode slime of step 3 may comprise 4.0 wt% to 9.0 wt% of the noble metal relative to the anode slime. At this time, if the concentration of the noble metal in the anode is 100%, the concentration of the noble metal in the anode slurry may be 500% to 850%. This is because, as described above, by controlling the iron content of the alloy composed of the anode, it is possible to suppress distribution of the components other than the noble metal to the anode slime during the electrochemical dissolution of the components constituting the alloy, And the effect is to activate. In addition, iron nickel, cobalt, to be delivered dissolved in the electrolyte over a wide pH range in the potential increase of the dissolution during the anode ions phase comparison or the like of copper, without forming the anode slime, wherein generating iron ions (Fe ^{3 +)} that is The base metal can act as an oxidizing agent to promote dissolution.

The anode slime recovery in step 3 may be performed by recovering the separation membrane that can be provided in the electrolytic dissolution of step 2 and solid-liquid separation of the electrolyte in the separation membrane.

According to another aspect of the present invention,

The anode slime is prepared through the above-described method (steps 1 to 3, S10 to S30), and contains 4.0 wt% to 9.0 wt% of noble metal based on the entire alloy.

As an example of the anode slime composition,

From 1.0 wt% to 8.5 wt% of copper;

1.0 wt% to 2.5 wt% of gold;

From 2.5 wt% to 8.0 wt%;

From 0.3 wt% to 4.0 wt% of iron; And

Remaining tin and unavoidable impurity amount.

If the concentration of the noble metal in the alloy composed of the anode used in the above method is 100%, the concentration of the noble metal in the anode slime may be 500% to 850%.

According to another aspect of the present invention,

From 6.0 wt% to 17.0 wt% tin;

From 5.0 wt% to 10.0 wt% of iron;

0.1 to 2.0 wt% of gold or silver; And

And an amount of the remaining copper and unavoidable impurities. The present invention also provides an alloy for concentrating precious metals through electrolytic dissolution.

The noble metal concentration alloy,

From 6.0 wt% to 17.0 wt% tin;

From 5.0 wt% to 10.0 wt% of iron;

0.1 wt% to 2.0 wt% of gold;

0.1 wt% to 2.0 wt%; And

Residual copper and unavoidable impurity levels.

The noble metal concentration alloy having the above-mentioned composition range is effective in preventing the components other than the noble metal from being distributed to the anode slime during the electrochemical dissolution of the components constituting the alloy at the time of electrolytic dissolution and activating the leaching to the electrolyte solution Effect can be shown. In addition, iron nickel, cobalt, to be delivered dissolved in the electrolyte over a wide pH range in the potential increase of the dissolution during the anode ions phase comparison or the like of copper, without forming the anode slime, wherein generating iron ions (Fe ^{3 +)} that is The base metal can act as an oxidizing agent to promote dissolution.

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples. However, the following examples and experimental examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

≪ Example 1 > 1.3 wt% of Fe; Cu 82.4 wt%; Sn 15.2 wt%; 0.3 wt% of Au; Ag 0.8 wt%; Concentration of precious metals in alloys

Step 1: Alloy with controlled iron content, Fe 1.3 wt%; Cu 82.4 wt%; Sn 15.2 wt%; 0.3 wt% of Au; Ag 0.8 wt%;

Step 2 - Step a: an anode composed of the above-mentioned alloy; A cathode made of stainless steel; 250 mL of electrolyte containing 1 M sulfuric acid; And a polypropylene separator film surrounding the anode at predetermined intervals. At this time, the contact area of the electrolyte in the anode was 6.23 cm 2 and the weight was 45.9986 g.

Step 2 - Step b: Electrolytic dissolution was performed so that the anode current density was 20.0 mA / cm 2 by applying a current of 124.68 mA to the anode at an electrolyte temperature of 60 ° C.

Step 3: The separator was recovered to recover the anode slime produced in the anode, followed by washing and drying.

The process energy consumption in the electrolytic dissolution of step b above was 3.1562 Wh, and the process energy consumption per kg of anode was 0.6142 Wh / kg.

≪ Example 2 > Fe 3.6 wt%; Cu 82.0 wt%; 13.3 wt% Sn; 0.3 wt% of Au; Ag 0.8 wt%; Concentration of precious metals in alloys

Step 1: Fe-controlled alloy, Fe 3.6 wt%; Cu 82.0 wt%; 13.3 wt% Sn; 0.3 wt% of Au; Ag 0.8 wt%;

Step 2-Step a: The procedure was the same as Step 2-a of Example 1 except that the anode had an electrolyte contact area of 6.22 cm 2 and a weight of 45.9932 g.

Step 2 - Step b: Electrolytic dissolution was performed so that the anode current density was 20.0 mA / cm 2 by applying a current of 124 mA to the anode at an electrolyte temperature of 60 ° C.

Step 3: The separator was recovered to recover the anode slime produced in the anode, followed by washing and drying.

The process energy consumption in the electrolytic dissolution of step b above was 4.2613 Wh, and the process energy consumption per kg of anode was 0.6770 Wh / kg.

Example 3 Fe 5.1 wt%; Cu 83.9 wt%; 9.9 wt% Sn; 0.3 wt% of Au; Ag 0.8 wt%; Concentration of precious metals in alloys

Step 1: Fe-controlled alloy, Fe 5.1 wt%; Cu 83.9 wt%; 9.9 wt% Sn; 0.3 wt% of Au; Ag 0.8 wt%;

Step 2-Step a: The procedure was the same as Step 2-step a) of Example 1 except that the anode had an electrolyte contact area of 6.52 cm 2 and a weight of 45.8418 g.

Step 2 - Step b: Electrolytic dissolution was carried out so that the anode current density was 20.0 mA / cm 2 by applying a current of 130.44 mA to the anode at an electrolyte temperature of 60 ° C.

Step 3: The separator was recovered to recover the anode slime produced in the anode, followed by washing and drying.

The process energy consumption at the electrolytic dissolution of step b above was 3.2128 Wh, and the process energy consumption per kg of anode was 0.5025 Wh / kg.

Example 4: 6.8 wt% of Fe; Cu 85.6 wt%; 6.6 wt% Sn; 0.2 wt% Au; Ag 0.8 wt%; Concentration of precious metals in alloys

Step 1: Fe-controlled alloy, Fe 6.8 wt%; Cu 85.6 wt%; 6.6 wt% Sn; 0.2 wt% Au; Ag 0.8 wt%;

Step 2 - Step a: The procedure was the same as Step 2-a of Example 1 except that the anode had an electrolyte contact area of 6.67 cm 2 and a weight of 41.5288 g.

Step 2-Step b: Electrolytic dissolution was performed so that the anode current density was 20.0 mA / cm 2 by applying a current of 134 mA to the anode at an electrolyte temperature of 60 ° C.

Step 3: The separator was recovered to recover the anode slime produced in the anode, followed by washing and drying.

The process energy consumption during electrolytic dissolution of step b above was 3.6066 Wh and the process energy consumption per kg anode was 0.5489 Wh / kg.

≪ Comparative Example 1 > 82.1 wt% of Cu; 16.8 wt% Sn; 0.3 wt% of Au; Ag 0.8 wt%; Concentration of precious metals in alloys

Step 1: Uncondensed alloy with 82.1 wt% Cu; 16.8 wt% Sn; 0.3 wt% of Au; Ag 0.8 wt%;

Step 2-Step a: The procedure was the same as Step 2-a of Example 1 except that the anode had an electrolyte contact area of 6.59 cm 2 and a weight of 51.57 g.

Step 2 - Step b: Electrolytic dissolution was performed so that the anode current density was 20.0 mA / cm 2 by applying a current of 132 mA to the anode at an electrolyte temperature of 60 ° C.

Step 3: The separator was recovered to recover the anode slime produced in the anode, followed by washing and drying.

The process energy consumption in the electrolytic dissolution of step b above was 3.2880 Wh, and the process energy consumption per kg of anode was 0.5031 Wh / kg.

The anode compositions of the above Examples and Comparative Examples are shown in Table 1.

Fe (wt%) Cu (wt%) Sn (wt%) Au (wt%) Ag (wt%) Example 1 1.3 82.4 15.2 0.3 0.8 Example 2 3.6 82 13.3 0.3 0.8 Example 3 5.1 83.9 9.9 0.3 0.8 Example 4 6.8 85.6 6.6 0.2 0.8 Comparative Example 1 - 82.1 16.8 0.3 0.8

EXPERIMENTAL EXAMPLE 1 Distribution Analysis of Each Component of Alloy 1

In Example 1, distribution of constituent components of each anode after electrolytic dissolution was measured by ICP analysis, and the results are shown in Table 2.

division unit Fe Cu Sn Au Ag Other total Anode weight reduction * wt% 1.3 82.4 15.2 0.3 0.8 - 100 g 0.0668 4.2345 0.7811 0.0154 0.0411 - 5.1389 Material balance 100 100 100 100 100 - - Anode slime wt% 0.58 5.85 55.8 1.94 3.32 32.51 100 g 0.0076 0.0763 0.7276 0.0253 0.0433 0.4239 1.304 Distribution ratio 4.3 1.5 91.6 100 100 - - Material balance 11.3 1.8 93.2 164.1 105.3 - - Electrolyte mg / L 674 382 101 0 0 - 1157 g 0.1685 0.0955 0.0253 0 0 - 0.2893 Distribution ratio 95.7 1.9 3.2 0 0 - - Material balance 252.2 2.3 3.2 0 0 - - Cathode precursor wt% 0 97 0.81 0 0 2.19 100 g 0 4.7001 0.0392 0 0 0.1061 4.8455 Distribution ratio 0 94.7 4.9 0 0 - - Material balance 0 111.0 5.0 0 0 - - The initial cathode precursor mg / L 0 1820 41.6 0 0.3 - 1861.9 g 0 0.091 0.0021 0 0 0 0.0931 Distribution ratio 0 1.8 0.3 0 0 - - Material balance 0 2.1 0.3 0 0 - -

(* In the anode weight reduction, the reduced weight of each component represents a value according to the original alloy composition and may differ from the actual one)

As shown in Table 2, in Example 1, gold and silver in the anode slime were 1.94 wt% and 3.32 wt%, respectively, and it was confirmed that iron dissolves faster than the anode basic composition and most of the gold and silver are distributed in the electrolyte , And that most of the copper was electrodeposited on the cathode. In the case of tin, a small amount was electrodeposited on the cathode and the remainder was contained as an anode slime.

It was confirmed that the concentration of the noble metal (containing 5.26 wt% based on the anode slime) of the anode slime of Example 1 was 478% when the concentration of noble metal in the anode (containing 1.1 wt% based on the anode) was 100%.

≪ Experimental Example 2 >

In Example 2, the distribution of constituent components of each anode after electrolytic dissolution was measured, and the results are shown in Table 3.

division unit Fe Cu Sn Au Ag Other total Anode weight reduction * wt% 3.6 82 13.3 0.3 0.8 - 100 g 0.2266 5.1616 0.8372 0.0189 0.0504 - 6.2946 Material balance 100 100 100 100 100 - - Anode slime wt% 0.73 8.34 51.9 1.6 3.35 34.08 100 g 0.0100 0.1138 0.7080 0.0218 0.0457 0.4649 1.3642 Distribution ratio 3.3 2.4 95.2 100 99.6 - - Material balance 4.4 2.2 84.6 115.6 90.8 - - Electrolyte mg / L 1160 1060 57.5 0 0 - - g 0.2900 0.2650 0.0144 0 0 - - Distribution ratio 96.7 5.5 1.9 0 0 - - Material balance 128.0 5.1 1.7 0 0 - - Cathode precursor wt% 0 95.3 0.45 0 0.004 4.246 100 g 0 4.3744 0.0207 0 0.0002 0.1948 4.5901 Distribution ratio 0 90.6 2.8 0 0.4 - - Material balance 0 84.7 2.5 0 0.4 - - The initial cathode precursor mg / L 0 1470 15.6 0 0.18 - 1485.8 g 0 0.0735 0.0008 0 0 - 0.0743 Distribution ratio 0 1.5 0.1 0 0 - - Material balance 0 1.4 0.1 0 0 - -

(* In the anode weight reduction, the reduced weight of each component represents a value according to the original alloy composition and may differ from the actual one)

As shown in Table 3, in Example 2, gold and silver in the anode slime were 1.6 wt% and 3.35 wt%, respectively, and it was confirmed that iron dissolves faster than the anode basic composition and most of the gold and silver are distributed in the electrolyte , And that most of the copper was electrodeposited on the cathode. In the case of tin, a small amount was electrodeposited on the cathode and the remainder was contained as an anode slime.

It was confirmed that the noble metal concentration ratio (containing 4.95 wt% based on the anode slime) of the anode slime of Example 2 was 450% when the concentration of noble metal in the anode (containing 1.1 wt% based on the anode) was 100%.

≪ Experimental Example 3 >

In Example 3, the distribution of constituent components of each anode after electrolytic dissolution was measured, and the results are shown in Table 4.

division unit Fe Cu Sn Au Ag Other total Anode weight reduction * wt% 5.1 83.9 9.9 0.3 0.8 - 100 g 0.3261 5.3642 0.6330 0.0192 0.0511 - 6.3936 Material balance 100 100 100 100 100 - - Anode slime wt% 1.72 3.96 53.5 1.82 4.26 34.74 100 g 0.0198 0.0456 0.6158 0.0209 0.0490 0.3999 1.1510 Distribution ratio 4.6 1.0 95.7 100 100 - - Material balance 6.1 0.8 97.3 109.2 95.9 - - Electrolyte mg / L 1660 656 15.5 0 0 - - g 0.4150 0.1640 0.0039 0 0 - 0.5829 Distribution ratio 95.4 3.4 0.6 0 0 - - Material balance 127.3 3.1 0.6 0 0 - - Cathode precursor wt% 0 98 0.52 0 0 1.48 100 g 0 4.4724 0.0237 0 0 0.0675 4.5637 Distribution ratio 0 93.4 3.7 0 0 - - Material balance 0 83.4 3.7 0 0 - - The initial cathode precursor mg / L 0 2130 0.26 0 0.23 - 2130.5 g 0 0.1065 0 0 0 - 0.1065 Distribution ratio 0 2.2 0 0 0 - - Material balance 0 2.0 0 0 0 - -

(* In the anode weight reduction, the reduced weight of each component represents a value according to the original alloy composition and may differ from the actual one)

As shown in Table 4, in Example 3, gold and silver in the anode slime were 1.82 wt% and 4.26 wt%, respectively. It was confirmed that iron dissolves faster than the anode basic composition and most of the gold and silver were distributed in the electrolyte , And that most of the copper was electrodeposited on the cathode. In the case of tin, a small amount was electrodeposited on the cathode and the remainder was contained as an anode slime.

It was confirmed that the concentration of the noble metal (containing 6.08 wt% based on the anode slime) of the anode slime of Example 3 was 553% when the concentration of noble metal in the anode (containing 1.1 wt% based on the anode) was 100%.

EXPERIMENTAL EXAMPLE 4 Analysis of Distribution of Each Component of Alloy 4

In Example 4, the distribution of constituent components of each anode after electrolytic dissolution was measured, and the results are shown in Table 5.

division unit Fe Cu Sn Au Ag Other total Anode weight reduction * wt% 6.8 85.6 6.6 0.2 0.8 - 100 g 0.4468 5.6243 0.4336 0.0131 0.0526 - 6.5704 Material balance 100 100 100 100 100 - - Anode slime wt% 2.93 3.32 51.5 2.19 6.32 33.74 100 g 0.0237 0.0268 0.4158 0.0177 0.0510 0.2723 0.8073 Distribution ratio 3.4 0.5 94.8 100 100 - - Material balance 5.3 0.5 95.9 134.5 97.1 - - Electrolyte mg / L 2660 97.7 0.3 0 0 - 3213.8 g 0.6650 0.1325 0.0060 0 0 - 0.8035 Distribution ratio 96.6 2.5 1.4 0 0 - - Material balance 148.8 2.4 1.4 0 0 - - Cathode precursor wt% 0 97.7 0.3 0 0 2.0 100 g 0 4.9863 0.0153 0 0 0.1021 5.1037 Distribution ratio 0 94.5 3.5 0 0 - - Material balance 0 88.7 3.5 0 0 - - The initial cathode precursor mg / L 0 2640 31.3 0 0.25 - 2671.6 g 0 0.1320 0.0016 0 0 - 0.1336 Distribution ratio 0 2.5 0.4 0 0 - - Material balance 0 2.3 0.4 0 0 - -

(* In the anode weight reduction, the reduced weight of each component represents a value according to the original alloy composition and may differ from the actual one)

As shown in Table 5, in Example 4, the gold and silver in the anode slime were 2.19 wt% and 6.32 wt%, respectively, and it was confirmed that iron dissolves faster than the anode basic composition and most of the gold and silver were distributed in the electrolyte , And that most of the copper was electrodeposited on the cathode. In the case of tin, a small amount was electrodeposited on the cathode and the remainder was contained as an anode slime.

It was confirmed that the concentration of the noble metal in the anode slurry of Example 4 (containing 8.51 wt% based on the anode slurry) was 851% when the concentration of the noble metal in the anode (containing 1.0 wt% based on the anode) was 100%.

EXPERIMENTAL EXAMPLE 5 Analysis of Distribution of Each Component of Alloy 5

In Comparative Example 1, the distribution of the constituent components of each anode after electrolytic dissolution was measured, and the results are shown in Table 6.

division unit Fe Cu Sn Au Ag Other total Anode weight reduction * wt% 0 82.1 16.8 0.3 0.8 - 100 g 0 5.3654 1.0979 0.0196 0.0523 - 6.5352 Material balance - 100 100 100 100 - - Anode slime wt% 0 9.42 54.2 1.6 3.42 31.36 100 g 0 0.1307 0.7519 0.0222 0.0474 0.4351 1.3873 Distribution ratio 0 2.5 86.6 100 99.1 - - Material balance - 2.4 68.5 113.2 90.8 - - Electrolyte mg / L 0.37 253 2.3 0 0.12 - 255.79 g 0.0001 0.0633 0.0006 0 0 - 0.0639 Distribution ratio 100 1.2 0.1 0 0.1 - - Material balance - 1.2 0.1 0 0.1 - - Cathode precursor wt% 0 91.5 2.1 0 0.007 6.39 100 g 0 5.0482 0.1159 0 0.0004 0.3527 5.5172 Distribution ratio 0 95.5 13.3 0 0.8 - - Material balance - 94.1 10.6 0 0.7 - - The initial cathode precursor mg / L 0 833 3.88 0 0.14 - 837 g 0 0.0417 0.0002 0 0 - 0.0419 Distribution ratio 0 0.8 0 0 0 - - Material balance - 0.8 0 0 0 - -

(* In the anode weight reduction, the reduced weight of each component represents a value according to the original alloy composition and may differ from the actual one)

As shown in Table 6, in Comparative Example 1, gold and silver in the anode slime were 1.6 wt% and 3.42 wt%, respectively, and it was confirmed that most of the copper was electrodeposited on the cathode.

It was confirmed that the noble metal concentration ratio (containing 5.02 wt% based on the anode slime) of the anode slime of Comparative Example 1 was 456% when the concentration ratio of noble metal (containing 1.1 wt% based on the anode) of the anode was 100%.

The distribution charts of iron, tin, copper, gold and silver in Examples 1 to 4 and Comparative Example 1 are shown in Figs.

As shown in FIG. 3, the distribution of copper showed a tendency that the content of iron contained in the anode slime decreased as the iron content of the anode alloy increased.

As shown in FIG. 4, the distribution of tin was gradually contained in the anode slime as the iron content of the anode alloy increased.

As shown in Fig. 5, the distribution of iron was not shown in Comparative Example 1, and in Examples 1 to 4, it was confirmed that most of the iron dissolved in the electrolyte.

As shown in FIGS. 6 to 7, it was confirmed that almost all of the noble metal content was distributed to the anode slime regardless of the iron content control.

Therefore, according to one aspect of the present invention, the noble metal concentration method by controlling the alloy composition can reduce the concentration of noble metal in the anode slime during the electrolytic dissolution of the alloy due to the adjustment of the iron content of the noble metal- Has a remarkable effect that can represent 500% to 850%.

Although a specific embodiment of the noble metal concentration method by controlling the alloy composition according to one aspect of the present invention has been described above, it is apparent that various modifications can be made without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be construed as being limited to the embodiments described, but should be determined by equivalents to the appended claims, as well as the following claims.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

Claims (14)

Adjusting the iron content of the alloy including tin, gold, silver, copper and iron to be 5.1 wt% to 6.8 wt% (step 1);
An anode composed of the iron content controlled alloy; Cathode; And performing an electrolytic dissolution with the electrolyte (step 2); And
And recovering the anode slime produced by the electrolytic dissolution (step 3)
Wherein the anode of step 2 comprises from 6.0 wt% to 17.0 wt% of tin; From 5.1 wt% to 6.8 wt% of iron; 0.1 wt% to 2.0 wt% of gold; 0.1 wt% to 2.0 wt%; The remaining copper; And an unavoidable amount of impurities.
delete delete delete The method according to claim 1,
The electrolytic dissolution of step 2 is carried out,
An anode composed of the iron content controlled alloy; And a cathode (step a); And
Applying current to the cathode and the anode in the electrolyte (step b); The method of concentrating a noble metal according to claim 1,
6. The method of claim 5,
The electrolytic dissolution of step 2 is carried out,
Wherein the cathode is composed of one selected from the group consisting of copper, stainless steel, titanium, and combinations thereof.
6. The method of claim 5,
The electrolytic dissolution of step 2 is carried out,
And a separation membrane which surrounds the anode at a predetermined interval. The method of concentrating a noble metal according to claim 1,
6. The method of claim 5,
The electrolytic dissolution of step 2 is carried out,
Wherein the electrolyte comprises sulfuric acid or copper sulfate, and the concentration of sulfuric acid or copper sulfate in the electrolyte is 0.3 M to 2.0 M.
6. The method of claim 5,
The electrolytic dissolution of step 2 is carried out,
Characterized in that the precious metal is carried out at a temperature of from 40 캜 to 80 캜.
6. The method of claim 5,
The electrolytic dissolution of step 2 is carried out,
And the anode current density is 10 mA / cm 2 to 30 mA / cm 2.
delete delete From 6.0 wt% to 17.0 wt% tin;
From 5.1 wt% to 6.8 wt% of iron;
0.1 wt% to 2.0 wt% of gold;
0.1 wt% to 2.0 wt%;
The remaining copper; And an unavoidable amount of impurities are contained in the alloy.
delete

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