KR20150116637A

KR20150116637A - Electrolyzer for withdrawing valuable metal

Info

Publication number: KR20150116637A
Application number: KR1020140041757A
Authority: KR
Inventors: 홍기섭
Original assignee: 홍기섭
Priority date: 2014-04-08
Filing date: 2014-04-08
Publication date: 2015-10-16

Abstract

The present invention relates to an electrolyzer for recovering valuable metal, wherein valuable metal contained in wastewater such as metal waste water, washing liquid used in a plating process, leachate solution of ores, leachate of scraps, and the like can be recovered swiftly and precisely by increasing a specific contact surface area between a cathode and an anode. The electrolyzer for recovering valuable metal, which has a cathode and an anode corresponding to each other and recovers recyclable valuable metal by electro-depositing the valuable metal from wastewater containing plating wastewater or valuable metal via electrolysis, comprises: a housing having an inlet for introducing wastewater in one side, an outlet for discharging wastewater in the other side, and an inner space; multiple cathodes installed in zigzag at regular intervals while dividing the inner space of the housing in a longitudinal direction; multiple anodes installed between the cathodes and installed in zigzag to classify spaces between the adjacent cathodes as multiple spaces for recovering valuable metal; and a filling material which is a conductive material, is filled in the spaces for recovering valuable metal, has multiple gaps to allow the wastewater to pass through.

Description

[0001] The present invention relates to an electrolyzer for withdrawing valuable metal,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic cell for recovery of valuable metals, and particularly relates to an electrolytic bath for recovering valuable metals contained in an aqueous solution containing a plating waste solution, a cleaning solution used in a plating process, a leaching solution of ore, The present invention relates to an electrolytic cell for recovering valuable metals.

BACKGROUND ART In general, scrap of electronic parts including printed circuit boards (PCBs) used in various electronic products, recycling of valuable metals from spent catalysts, which are frequently found in chemical plants, and the like, Since the wastewater generated in the factory and the wastewater generated in the photographic development contain a large amount of heavy metals, the recycling of such wastewaters and the efficient recovery of valuable metals recovered from the wastewaters are very important in terms of creating value of waste resources and preventing environmental pollution It is one of the pending issues being discussed.

The wastewater containing valuable metals such as platinum (Pt), palladium (Pd), rhodium (Rh), gold (Au), silver (Ag), copper (Cu) A method of recovering valuable metals by using chemical precipitation or electrolysis has been used as a method for recovering the waste metal from the waste, by leaching the waste resource mainly using acid or alkali as a solvent.

The electrolysis method is used not only for the recovery of valuable metals and heavy metals contained in wastewater but also for the treatment and production of general inorganic compounds or organic compounds. However, the conventional electrolysis apparatus takes a long time or low efficiency And the apparatus itself occupies a lot of space.

On the other hand, as for the wastewater treatment methods mainly used in plating companies, most of the treatment methods such as sludge formation and landfilling by chemical treatment are used, so that the valuable metal components and water in the wastewater can not be substantially recycled, But also has a problem in that a great deal of cost is incurred in the treatment of chemical agents.

On the other hand, according to Korean Patent Laid-Open Publication No. 10-2009-0047677 (entitled "Method and apparatus for electrolytic recycling of noble metals"), a negative electrode and a positive electrode are arranged so as to cross each other and the negative electrode has a negative electrode However, the electrolytic sampling method of the noble metal is such that the aqueous solution discharged from the electrolytic solution storage tank passes through the cathode at a time, so that it is difficult to recover the noble metal and the current efficiency is lowered with the passage of time .

FIG. 1 shows an embodiment of an electrolytic cell for electrodeposition and recovery of a valuable metal in wastewater containing plating wastewater or valuable metal according to the prior art. The electrolytic bath comprises a cylindrical housing 10 in which an inner cavity 13 is formed, And the cylindrical inner electrode plate 20 and the cylindrical outer electrode plate 30 are disposed, respectively. The housing 10 has an inlet 11 and an outlet 12 through which wastewater flows.

According to this structure, power is supplied from an external power supply (not shown), and electricity flows to the inner and outer electrodes 20 and 30. At this time, the polarity of the internal electrode 20 and the external electrode 30 can be arbitrarily set, and one side is a (-) pole and the other side is a (+) pole.

As a result, electrons are supplied from the negative electrode (-) to the wastewater (solution) in the electrolytic cell, and a covalent metal is attached to the negative electrode by an electrochemical reduction reaction in which cations are diffused to the electrode surface, .

However, in the conventional electrolytic cell having one negative electrode and one positive electrode structure, the specific surface area of the negative electrode is not wide, so that the area and time of contact of the wastewater in the electrolytic cell with the negative electrode is shortened, which is an obstacle to efficient recovery of valuable metals have.

In addition, since the specific surface area to be contacted in the waste water containing low concentration wastewater, that is, wastewater containing 10 ppm or less of the valuable metal is very small, the deposit of the valuable metal is difficult to recover and the efficiency is very low.

In other words, since the reduction process occurs only on the surface of a single anode electrode, the reaction rate is limited and a plurality of electrolytic cells are required for mass production, and the electrolytic efficiency is significantly deteriorated over time.

On the other hand, in general, an electrode plate made of titanium (Ti) is used as an electrode. However, the titanium has an advantage that it does not dissolve in aqua regia to recover electrodeposited valuable metal. However, since the electrical conductivity is low, A metal or a combination thereof is plated.

Further, in order to enlarge the specific surface area, when the size of the electrode is increased or the number of the electrodes is increased, the size of the entire electrolytic bath has to be increased, and therefore the manufacturing cost and maintenance burden have increased.

Accordingly, it is required to develop an electrolytic cell having a structure of widening the specific surface area in which the wastewater is contacted and having a structure capable of increasing the electrolytic efficiency for recovering valuable metals.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a process for producing a waste water containing waste water containing waste water, a cleaning solution used in a plating process, An object of the present invention is to provide an electrolytic cell for a valuable metal recovering apparatus capable of recovering metal quickly and precisely.

In order to achieve the above object, an electrolytic cell for recovering valuable metals according to the present invention comprises a negative electrode and a positive electrode correspondingly to each other, electrolytically separating the recovered valuable metal from waste water containing plating waste water or valuable metal, Wherein the electrolytic cell comprises a housing having an inlet port through which wastewater flows in one side and an outlet port through which wastewater flows out from the other side and having an internal space; A plurality of cathodes installed in a zigzag pattern, and a plurality of anodes provided between the cathodes and the cathodes and arranged in a zigzag form to divide the space between the adjacent cathodes and cathodes into a plurality of valuable metal recovery spaces, The metal recovery space is filled with a conductive material and a plurality of gaps It characterized by comprising an formed filler.

The electrolytic cell for recovering valuable metals according to the present invention has the following effects.

First, by increasing the contact specific surface area between the cathode and the anode, the valuable metal contained in the waste water including the gold waste liquid, the cleaning liquid used in the plating process, the leaching solution of ore, and the waste liquid of waste scrap can be recovered quickly and precisely .

Second, the contact surface area of the wastewater flowing into the electrolytic cell is increased by filling a propellant made of a conductive material between the anode and the cathode or between the anode and the anode, so that wastewater containing a very small amount of valuable metal can be easily electrodeposited Can be recovered.

Third, a high efficiency of electrolysis can be obtained because a plurality of valuable metal recovery spaces are divided between the anode and the anode or between the cathode and the cathode, and the wastewater sequentially passes through the valuable metal recovery space and the valuable metal is electrodeposited.

Fourthly, the gas generated during the electrolysis process is primarily discharged by the gas discharge hole formed at one side of the housing to increase the stability of the electrolytic bath, and by the fluid-resistant ball which controls the gas discharge hole by the internal pressure, It is possible to prevent the external leakage of the battery.

1 is a cross-sectional side view schematically showing an electrolytic bath for recovering a valuable metal according to the prior art
2 is a side sectional view schematically showing an electrolytic bath for recovering a valuable metal recovered by the present invention
3 is a side sectional view showing an electrolytic bath for recovering a valuable metal according to another embodiment of the present invention
4 to 7 are views showing various embodiments of the filler applied to the electrolytic bath for recovering the valuable metal according to the present invention

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an electrolytic cell for recovering a valuable metal according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

In addition, the same or corresponding components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. For convenience of explanation, the size and shape of each constituent member shown may be exaggerated or reduced have.

2 is a side sectional view schematically showing an electrolytic bath for recovering a valuable metal according to the present invention.

As shown in FIG. 2, the electrolytic bath 100 for recovering valuable metals according to the present invention comprises a cathode and an anode electrode corresponding to each other and electrolytically separates the electrolytic water from the plating waste water or waste water containing a valuable metal, A housing 110 having an inlet 111 through which wastewater flows into one side and an outlet 112 through which wastewater flows out from the other side and having an internal space 113; A plurality of cathodes 120 installed in a zigzag shape at regular intervals while dividing the internal space 113 of the housing 110 in the vertical direction and a plurality of cathodes 120 provided between the cathodes 120 and the cathodes 120, A plurality of positive electrodes 130 installed in a zigzag form to divide the spaces of the cathode 120 and the cathode 120 into a plurality of valuable metal recovery spaces A, Filled with And a filler 140 having a plurality of gaps formed therein to allow the wastewater flowing through the inlet 111 to pass therethrough.

The wastewater flowing into the inlet 111 sequentially passes through the plurality of the valuable metal recovering spaces A and deposits a valuable metal on the anode 130 and the filler 140 to be recovered. As shown in FIG.

A plurality of gas discharging holes (not shown) are formed on the upper surface of the housing 110. The gas discharging holes are formed in a process of depositing (recovering) valuable metals in the wastewater, The gas generated during the recovery process is discharged to the outside.

The electrolytic cell 100 for recovering valuable metals according to the present invention is an electrolytic cell for recovering valuable metals which can be recycled in the plating wastewater or wastewater containing valuable metals, So that the valuable metal can be efficiently deposited and recovered even in wastewater containing a small amount of valuable metal through the filler 140 filled in the valuable metal recovering space have.

In order to increase the specific surface area, a plurality of zigzag cathodes 120 are arranged at regular intervals in the inner space 113 of the housing 110 and are positioned between two adjacent cathodes 120 A plurality of positive electrodes 130 are disposed to form a valuable metal recovery space A together with a negative electrode and to which a valuable metal is electrodeposited according to the supply of power.

At this time, the housing 110 has an inlet 111 through which the wastewater flows into the front end thereof, an outlet 112 through which the wastewater flows into the inlet space 111, 113). The inlet port 111 is formed to penetrate the upper surface of the front end of the housing 110 and the outlet port 112 is formed at the rear upper end of the housing 110 and the gas discharging hole is formed at the upper surface of the upper portion of the housing 110 .

The anode 130 divides a space between the cathode 120 and the cathode 120 into two valuable metal recovery spaces A.

The wastewater from which the valuable metal is recovered is discharged to the outside through the outlet (112) of the housing (110). At this time, the gas discharge hole is formed in the housing 110 so that the wastewater can not escape from the internal space 113 of the housing 110 while passing through the valuable metal recovering space A according to the electrolysis process inside the housing 110, To be discharged first.

The gas discharge hole is necessary to prevent the damage of the electrolytic cell 100 due to the gas filled in the inner space 113 of the housing 110 and the risk of accident.

The cathode 120 and the anode 130 are connected to an external power source (not shown) by an electrode tip protruding out of the housing 110 to supply power to the anode 110 and the anode 130, respectively, It becomes charged. Preferably, the housing 110 protruding from the electrode tip has a sealing structure in which the waste water does not leak to the outside.

The negative electrode 120 and the positive electrode 130 are formed in a plate structure that divides the internal space 113 of the housing 110 in the longitudinal direction.

When the anode 130 has a plate structure, valuable metals such as nickel (Ni), copper (Cu), and iron (Fe) can be recovered from the high concentration wastewater.

The anode 130 is positioned between the cathodes 120 to divide the oil-rich metal recovery space A into a plurality of openings, whereby the electrolysis process of the wastewater is repeated a number of times, thereby increasing the recovery rate of the precious metal.

That is, the anode 130 is disposed between the cathode 120 and the cathode 120 to divide the space between the neighboring cathode 120 and the cathode 120 into two valuable metal recovery spaces, and the housing 110 ) In the longitudinal direction.

Specifically, the anode 130 includes a first anode 131 formed between the cathode 120 and the cathode 120, and a plate-shaped mesh structure having a predetermined gap at one side of the first anode 131 A second anode 132 forming a first valuable metal recovery (electrolytic) space, and a second anode 131 formed on the other side of the first anode 131 and having a plate- And a third anode 133. The first and second valuable metal recovery spaces are filled with a filler material 140 made of a conductive material and provided with a plurality of gaps to allow the wastewater to pass therethrough.

The wastewater flowing into the inlet 111 of the housing 110 sequentially flows through the plurality of the valuable metal recovering spaces A and flows from the anode 130 filled with the filler material 140 made of a conductive material into the open- Is electrodeposited and recovered.

The filler material 140 is filled in a valuable metal recovery space A between the positive and negative electrodes 130 in a state where a large number of gaps are formed so that wastewater can flow therethrough to increase the contact specific surface area, 120). By dividing the electrolytic space into a plurality of electrolytic spaces, the electrolysis process of the wastewater is repeated many times, thereby increasing the recovery rate of the valuable metal.

Therefore, the specific surface area of the anode 130 is maximized by the filler material 140 filled in the oil-rich metal recovery space A between the zigzag-shaped anode 130 and the amount of the valuable metal in the wastewater is electrodeposited, The electrolytic efficiency, that is, the recovery of the valuable metal can be increased.

On the other hand, the cathode 120 and the anode 130 having a zigzag shape are repeatedly formed in a " d "shape to widen the specific surface area.

The inlet port 111 is connected to an external inlet pipe 114 through which the wastewater is conveyed from the outside and an external pump P for forcibly introducing the wastewater into the housing 110 is provided at one side of the external inlet pipe 114. [ ).

The external inflow conduit 114 may further include an additive inflow conduit 115 for forcibly injecting a current density additive for increasing the electrical conductivity to one side.

At this time, a control valve (not shown in the drawing) is further included on the additive inlet pipe 115 as needed, and the injection of the current density additive controls the control valve according to manual or automatic operation so that the inflow and inflow amount Respectively.

The housing 110 has a plurality of drain valves 116 connected to upper and lower portions of the refueling metal recovery space A at upper portions of the side walls.

The drain valve 116 communicates with the upper and lower portions of the oil-rich metal recovery space A to prevent the wastewater from flowing over the anode 130 when the drain valve 116 is opened, (A) can be removed. In addition, it is also possible to prevent the overflow of the wastewater into the next valuable metal recovery space to facilitate the replacement of the anode or the cathode.

The drain valve 116 may be disposed while forming one row in the longitudinal direction of the side wall of the housing 110. In this case, the drain valve 116 arranged in one row is connected to the drain pipe 116 through the drain pipe 117 .

There is an advantage that the movement of the wastewater can be controlled between the electrolytic spaces which are not adjacent to each other through the drain valve 116. For example, the wastewater can be moved from the electrolytic space located at the inlet 111 side to the electrolytic space located at the outlet 112 side.

Meanwhile, the housing 110 further includes a fluid-resistant ball in the inner space, which is configured to block the gas-discharging hole according to an internal pressure to prevent gas from moving and prevent leakage of the waste water. The fluid blocking ball may block the gas discharging hole according to the internal pressure during the electrolysis process of the internal space to prevent the gas from moving and discharging and preventing the leakage of the wastewater in the internal space.

The cathode (120) and the anode (130) are made of unplated titanium. The titanium (Ti) is produced in the subsequent process using impurities such as water, Metal can be obtained.

3 is a side sectional view showing an electrolytic bath for recovering a valuable metal according to a second embodiment of the present invention.

As shown in FIG. 3, in the electrolytic cell for recovering valuable metals according to the second embodiment of the present invention, the oil-rich metal recovery space A is formed between the anodes 130 in the first embodiment, but in the second embodiment, Except that the metal-free metal recovery space A is formed between the anode 120 and the cathode 120, detailed description thereof will be omitted.

FIGS. 4 to 7 are views showing each embodiment of a filler applied to an electrolytic bath for recovering a valuable metal according to the present invention.

The filling material 140 is made of a conductive material and is formed of at least one of a mesh structure (FIG. 4), a honeycomb shape (FIG. 5), a plurality of ball shapes (FIG. 6), and a porous plate Recover the valuable metal contained in the wastewater together with the cathode or the anode.

Here, the filler 140 may be filled or inserted between a positive electrode or a negative electrode having a zigzag shape and made of a conductive material to have pores having an average diameter of 3 to 5 nm for collecting the valuable metal together with the electrode, To < RTI ID = 0.0 > 80%. &Lt; / RTI >

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention as defined by the appended claims and their equivalents.

100: electrolytic bath 110: housing
120: cathode 130: anode
140: filler

Claims

An electrolytic cell for recovering a valuable metal recovered by electrodeposition of a recyclable valuable metal in waste water containing plating waste water or valuable metal through electrolysis with cathodes and positive electrodes corresponding to each other,
A housing having an inlet port through which wastewater flows in one side and an outlet port through which wastewater flows in the other side,
A plurality of cathodes arranged in a zigzag shape at regular intervals while dividing an inner space of the housing in a vertical direction,
A plurality of positive electrodes disposed between the negative electrode and the negative electrode and arranged in a zigzag manner to divide a space between the adjacent negative and negative electrodes into a plurality of valuable metal recovery spaces,
And a filling material filled in the refund metal recovery space with a conductive material to form a plurality of gaps through which the waste water passes.

2. The battery pack according to claim 1, wherein each of the positive electrodes comprises: a first positive electrode formed between the negative electrode and the negative electrode; and a second positive electrode having a plate-like mesh structure at one side of the first positive electrode, An anode, and a third anode having a mesh structure in a plate shape at a predetermined interval on the other side of the first anode and forming a second electrolytic space.

The method of claim 2, further comprising: supplying wastewater through the inlet port by a pump installed outside the housing, passing the first and second electrolytic spaces sequentially through the inflow wastewater, Wherein the metal is electrodeposited and recovered, and the waste water is discharged to the outside through the outlet.

The electrolytic cell for recovering valuable metals according to claim 1, wherein the filling material has a mesh structure.

2. The electrolytic cell for recovering valuable metals according to claim 1, wherein the filler is in the form of a honeycomb.

The electrolytic cell as claimed in claim 1, wherein the filler has a plurality of ball shapes made of a conductive material.

The electrolytic cell as claimed in claim 1, wherein the filler is a porous plate made of a conductive material.

The electrolytic cell as claimed in claim 1, wherein the cathode and the anode are made of an unplated titanium material.

The electrolytic cell for recovering valuable metals according to claim 1, wherein the cathode and the anode having the zigzag shape are repeatedly formed in a " d "shape.

An electrolytic cell for recovering a valuable metal recovered by electrodeposition of a recyclable valuable metal in waste water containing plating waste water or valuable metal through electrolysis with cathodes and positive electrodes corresponding to each other,
A housing having an inlet port through which wastewater flows in one side and an outlet port through which wastewater flows in the other side,
A plurality of positive electrodes arranged in a zigzag shape at regular intervals while dividing the internal space of the housing in the longitudinal direction,
A plurality of cathodes arranged between the anode and the anode and arranged in a zigzag shape to divide the space between the anode and the anode into a plurality of metal collecting spaces;
And a filling material filled in the refund metal recovery space with a conductive material to form a plurality of gaps through which the waste water passes.