KR101884400B1 - Non-ferrous metal electrolytic smelting system equipped with sludge treatment device under the electrolytic cell - Google Patents

Abstract

The present invention relates to a nonferrous metal electrolytic smelting system, having a sludge treatment unit for treating sludge stacked in the lower portion of an electrolyzer at once so as to easily clean the electrolyzer. The nonferrous metal electrolytic smelting system can conveniently clean the electrolyzer by having a sludge treatment unit for treating the sludge generated during electrolytic smelting at once under the electrolyzer. Moreover, the sludge can be directly discharged from the electrolyzer thanks to the sludge treatment unit so that an electrolyte filtering apparatus, which is conventionally required, is not required, thereby providing cost-efficient nonferrous metal electrolytic smelting system.

Description

TECHNICAL FIELD [0001] The present invention relates to a non-ferrous metal electrolytic smelting system equipped with a sludge treatment device,

The present invention relates to a non-ferrous metal electrolytic smelting system provided with a sludge treatment unit at the bottom of an electrolytic bath, and more particularly to a non-ferrous metal electrolytic smelting system having a sludge treatment unit for collectively treating sludge accumulated at a lower part of the electrolytic bath, And an electrolytic smelting system.

Generally, electrolysis refers to electrolysis refers to a chemical decomposition phenomenon in which an ion existing in an ionized state is transferred to an anode and a cathode in an electrolyte by inserting a cathode plate and an anode plate into an electrolytic cell containing an electrolyte, Electrolytic refining methods for extracting metals and extracting metals with high purity (copper, nickel, zinc, cobalt, lead, platinum, iridium, etc.) have been used.

During the electrolytic smelting process, sludge containing the impurities contained in the electrolytic solution, impurities generated in the electrolytic process, and pieces of the electrode plate that have been removed due to the corrosion of the electrode plate is precipitated in the electrolytic cell.

At this time, it is important to remove sludge precipitated in the electrolytic cell because the sludge settled in the electrolytic cell hinders the flow of current and the smelting of the metal is not smooth.

Conventional electrolytic smelting apparatuses mainly use a method of sucking sludge as a method for removing sludge or a method of discharging an electrolytic solution of an electrolytic bath and filtering the discharged electrolytic solution to remove sludge.

In the above two methods, the sludge can not be removed during the electrolytic smelting operation, and the electrolytic cell must be cleaned after the operation is completed. In the method of sucking the sludge precipitated in the lower part, the electrolytic solution is also sucked together and the sludge is cleaned However, there is a problem in that the method using the filtration apparatus requires a long time for filtering the electrolyte solution, and the filtration apparatus must be provided separately.

As a method for solving this problem, a region where sludge is settled in an electrolytic bath is formed in Korean Patent Registration No. 10-1729376 ("Electrolysis Apparatus with Cleaning Chamber ", Apr. 17, 2017) However, the prior art also has a problem that the sludge must be treated after the electrolysis is completed.

1. Korean Registered Patent No. 10-1729376 ("Electrolysis Apparatus with Washing Chamber ", Apr. 17, 2017).

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a non-ferrous metal electrolytic smelting system provided in a lower portion of an electrolytic cell with a sludge treatment unit capable of collectively treating sludge generated during electrolytic smelting The purpose.

A non-ferrous metal electrolytic smelting system equipped with a sludge treatment unit under the electrolytic bath of the present invention comprises: an electrolytic bath containing an electrolytic solution and an electrode; At least one positive electrode plate installed inside the electrolytic cell; At least one cathode plate installed at an interval and spaced apart from the cathode plate; And a sludge treatment unit formed in the lower part of the electrolytic bath, wherein the electrolytic bath internal sludge is settled.

The sludge treatment unit may include a sludge discharge pipe that is openable and closable at the lower end and discharges the sludge precipitated to the outside.

The sludge processing unit may further include a sensor for measuring the weight of the sludge, and it is determined whether the sludge discharge pipe is opened or closed according to the measured value from the sensor.

In addition, the sludge treatment section is characterized in that the width of the section becomes narrower toward the bottom.

The positive electrode plate or the negative electrode plate may include an energizing head which receives a current from the outside at an upper end thereof.

The electrolytic bath further includes an energizing bar provided at an upper end edge of the electrolytic cell and contacting the energizing head to supply current to the energizing head when the positive electrode plate or the negative electrode plate is inserted into the electrolytic cell. do.

In addition, a plurality of grooves having a predetermined gap in the lengthwise direction of the energizing bar are formed in the energizing bar, and the end of the energizing head is engaged with the groove.

The non-ferrous metal electrolytic smelting system may further include an ion exchange membrane disposed between the positive electrode plate and the negative electrode plate at a predetermined interval.

A sludge treatment method using a non-ferrous metal electrolytic smelting system, comprising: an electrolytic bath; a sludge treatment unit disposed in the lower part of the electrolytic bath for sedimenting the electrolytic bath sludge; and a sludge discharge pipe provided at a lower end of the sludge treatment unit for discharging sludge to the outside, An electrolytic smelting step in which an electrolytic smelting operation is started in the electrolytic bath; A weight measuring step of measuring the weight of sludge generated in the electrolytic smelting step by a weight sensor provided in the sludge treating unit; And comparing the measured value with the reference value in the weight measuring step.

The sludge treatment method using the non-ferrous metal electrolytic smelting system may further include discharging the sludge to the outside when the sludge discharge pipe is opened and the sludge is discharged to the outside when the measured value in the determining step is equal to or greater than a reference value And when the reference value is greater than the value measured in the weight measuring step, the sludge discharge pipe is maintained in the closed state, and the weight measuring step is performed.

Since the non-ferrous metal electrolytic smelting system equipped with the sludge treatment device under the electrolytic bath of the present invention having the above-described structure is provided in the lower part of the electrolytic cell with the sludge treatment part capable of collectively treating the sludge generated during electrolytic smelting, There is an effect that it is easy to clean.

In addition, since the sludge is directly discharged from the electrolytic bath to the outside by the sludge disposal unit, an electrolytic solution filtration apparatus that is conventionally required is not required, thereby providing an economical non-ferrous metal electrolytic smelting system.

1 is a perspective view of a non-ferrous metal electrolytic smelting system according to a first embodiment of the present invention;
2 is a front view of a non-ferrous metal electrolytic smelting system according to the first embodiment of the present invention;
FIG. 3 is a flowchart of a sludge treatment process of the non-ferrous metal electrolytic smelting system according to the first embodiment of the present invention
4 is a front view of a non-ferrous metal electrolytic smelting system according to the first embodiment of the present invention
5 is a front view of a non-ferrous metal electrolytic smelting system according to the first embodiment of the present invention
6 is a flow chart for controlling the supply pipe and the discharge pipe of the non-ferrous metal electrolytic smelting system according to the first embodiment of the present invention
7 is a side view of a non-ferrous metal electrolytic smelting system according to a modification of the first embodiment of the present invention
8 is a perspective view of a non-ferrous metal electrolytic smelting system according to the second embodiment of the present invention
Fig. 9 is a side view of a conductive bar of a non-ferrous metal electrolytic smelting system according to a second embodiment of the present invention
10 is a perspective view of a non-ferrous metal electrolytic smelting system according to a third embodiment of the present invention
11 is a cross-sectional view of a conductive bar of a non-ferrous metal electrolytic smelting system according to a third embodiment of the present invention

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a perspective view of a non-ferrous metal electrolytic smelting system according to a first embodiment of the present invention. As shown in FIG. 1, a hexagonal electrolytic cell 100 and a sludge treatment unit 200 are formed below the electrolytic bath 100 and are integrated with the electrolytic bath 100.

The electrolytic bath 100 is provided with a plurality of supply pipes 110 supplied with the electrolytic solution in the height direction of the electrolytic bath 100 and a discharge pipe 120 for discharging the electrolytic solution to the outside is also disposed in the height direction of the electrolytic bath 100 Are formed.

The sludge treatment unit 200 is provided to treat sludge including impurities contained in the electrolytic solution, impurities generated in the electrolytic smelting process and debris separated from the electrode plate, A sludge discharge pipe 210 is formed at a lower end of the sludge disposal unit 200 so that the sludge settled in the sludge disposal unit 200 is discharged to the outside .

FIG. 2 shows a front view of a non-ferrous metal electrolytic smelting system according to the first embodiment of the present invention. As shown in FIG. 2, FIG. 2 shows a front view of a non-ferrous metal electrolytic smelting system according to an embodiment of the present invention. As shown in FIG. 2, the electrolytic bath 100 contains electrolytic solution, and the electrode plate 300 is immersed in the electrolytic bath 100.

At this time, the electrode plate 300 is formed with an energizing head 310 which receives an external current from the upper end, and a hooking ring 320 is formed on the upper surface of the energizing head 310. The latching ring 320 is formed to engage with a separate crane device for moving the electrode plate 300. The polarity of the electrode plate 300 may be an anode or a cathode.

In the electrolytic bath 100, sludge including impurities contained in the electrolytic solution, impurities generated during the electrolytic smelting process, and debris separated from the electrode plate 300 is settled in the sludge treatment unit 200.

The sludge discharge pipe 210 is provided with a sludge discharge valve 211 for controlling the opening and closing of the sludge discharge pipe 210.

The sludge disposal unit 200 further includes a sensor for measuring the weight of the sludge. When the weight value measured by the sensor is higher than a reference value, the sludge discharge valve 211 is opened, The sludge is discharged to the outside.

The process of discharging the sludge to the outside through the sludge discharge pipe 210 will be described in more detail with reference to FIG. 3 and FIG.

FIG. 3 shows a sludge treatment flowchart of the non-ferrous metal electrolytic smelting system according to the first embodiment of the present invention. As shown in FIG. 3, the electrolytic smelting system of the present invention proceeds to step S100 in which the electrolytic solution and the electrode plate 300 are accommodated in the electrolytic bath 100 and an electrolytic smelting operation is started.

At this time, the sludge containing the impurities contained in the electrolytic solution, the impurities generated during the electrolytic smelting process, and the debris separated from the electrode plate 300 is precipitated in the sludge treatment unit 200 in the electrolytic bath 100.

The sludge treatment unit 200 includes a sensor for measuring the weight of the sludge, and proceeds to a weight measuring step S200 for measuring the weight of the sludge settled in the sludge treatment unit 200.

When the weight of the sludge is measured in the weight measuring step (S200), the determining step (S300) of comparing the measured value and the reference value is performed.

If it is determined in step S300 that the value measured in the weight measuring step S200 is equal to or greater than the reference value, the step S310 of opening the sludge discharge pipe 210 by the sludge discharge valve 211 And the sludge discharge pipe 210 is kept closed by the sludge discharge valve 211 when the reference value is greater than the value measured in the weight measuring step S200 in the determining step S300 (S320).

FIG. 4 is a front view of a non-ferrous metal electrolytic smelting system according to the first embodiment of the present invention. FIG. 4 is a schematic view showing a process in which the sludge discharge valve 211 is opened and the sludge is discharged to the outside through the sludge discharge pipe 210 because the weight value measured by the sensor is higher than a reference value.

As shown in FIG. 4, it can be seen that the sludge settled in the lower part of the sludge disposal unit 200 is discharged to the outside through the sludge discharge pipe 210.

Since the amount of metal electrodeposited on the electrode plate is proportional to the current and time, current must be supplied smoothly to the electrolyte. However, when the amount of impurities is large in the electrolytic solution, there is a problem that the efficiency of electrolytic smelting is deteriorated because current supply is not smooth.

The non-ferrous metal electrolytic smelting system of the present invention can provide an electrolytic smelting system with enhanced smelting efficiency because the sludge is automatically discharged to the outside whenever the amount of sludge generated during the electrolytic smelting operation exceeds a reference value.

In addition, since the amount of impurities contained in the electrolyte is small, the amount of impurities electrodeposited on the electrode plate is also reduced. Therefore, the non-ferrous metal electrolytic smelting system of the present invention can extract a metal having high purity.

FIG. 5 is a front view of a non-ferrous metal electrolytic smelting system according to the first embodiment of the present invention. As shown in FIG. 5, the plurality of supply pipes 110 formed in the height direction of the electrolytic bath 100 and supplying the electrolytic solution into the electrolytic bath 100 are each provided with a supply valve 111, The opening and closing of the supply pipe 110 can be controlled by the supply valve 111 and the flow rate of the electrolytic solution supplied through the supply pipe 110 can be adjusted.

Therefore, each of the supply pipes 110 may supply the same amount of electrolytic solution at the same time, but may supply the electrolytic solution at the same time, but may have different flow rates. In consideration of the work environment, The electrode 110 may not supply the electrolytic solution.

The discharge pipe 120 for discharging the electrolytic solution contained in the electrolytic bath 100 to the outside is also provided with a discharge valve 121. The discharge valve 121 can control the opening and closing of the discharge pipe 120, The flow rate of the electrolytic solution discharged through the discharge pipe 120 can also be adjusted.

Accordingly, the discharge pipe 120 may simultaneously discharge the electrolyte at the same flow rate, simultaneously discharge the electrolyte, but the flow rate may be different. In consideration of the work environment, the operator may select one of the plurality of discharge pipes 120 The discharge pipe 120 may not discharge the electrolytic solution.

It is possible to selectively open and close the supply pipe 110 and the discharge pipe 120 and to adjust the flow rate of the electrolytic solution. Therefore, the non-ferrous metal electrolytic smelting system of the present invention can be installed in the electrolytic bath 100 Flow can be selectively formed in the electrolytic solution.

The inner diameter of each of the supply pipe 110 and the discharge pipe 120 may be the same or different, and a pressure device such as a pump may be further provided to adjust the flow rate of the electrolytic solution.

에 불과하다. 전해조에 수용되는 전해액을 원활하게 교체하기 위한 유속은 이의 10배인 0.1

로, 전해액을 원활하게 교체하기 위해서 공급되는 전해액의 유속 및 배출되는 전해액의 유속을 조절할 필요가 있다.While the vortex is generated by the electrochemical reaction of the electrode during the electrolytic smelting process, the flow rate of the vortex due to the electrode is 0.01

. The flow rate for smoothly replacing the electrolytic solution contained in the electrolytic bath was 0.1

It is necessary to control the flow rate of the electrolytic solution supplied and the flow rate of the discharged electrolytic solution in order to smoothly replace the electrolytic solution.

In the conventional non-ferrous metal electrolytic smelting apparatus, since the electrolytic solution supply pipe and the discharge pipe are provided in a single number, the electrolytic solution contained in the electrolytic bath must be discharged and supplied again in order to replace the electrolytic solution.

However, in the non-ferrous metal electrolytic smelting system of the present invention, since a plurality of the supply pipe 110 and the discharge pipe 120 are provided, the degree of electrodeposition of the non-ferrous metal on the electrode plate 300 is checked, The electrolytic solution located in the upper part of the electrolytic solution, the electrolytic solution located in the central part, and the electrolytic solution located in the lower part can be replaced with fluid.

FIG. 6 is a flow chart for controlling the supply pipe and the discharge pipe of the non-ferrous metal electrolytic smelting system according to the first embodiment of the present invention. The supply pipe 110 and the discharge pipe 120 of the non-ferrous metal electrolytic smelting system of the present invention can adjust the supply valve 111 and the discharge valve 121 according to the operator's judgment, but the impurity concentration of the electrolytic solution is measured , And controls the supply valve (111) and the discharge valve (121) so as to search the optimum supply and discharge flow paths of the electrolytic solution based on the measured concentration values and form a searched flow path .

As shown in FIG. 6, the measuring step (S10) for measuring the impurity concentration of the electrolytic solution before supplying the electrolytic solution to the electrolytic bath 100 is performed. The electrolytic solution may be an electrolytic solution contained in the electrolytic bath 100 or an electrolytic solution to be supplied to the electrolytic bath 100.

As a method of measuring the impurity concentration of the electrolytic solution, it is possible to measure it through the value of the electric current flowing through the electrolytic solution, or an ordinary technician such as an X-ray radiograph can be selected according to the work environment.

The process proceeds to a transmission step S20 in which the impurity concentration value of the electrolyte measured in the measurement step S10 is transmitted to the control unit.

The controller proceeds to a searching step S30 for searching for an optimum supply flow rate, an optimum discharge flow rate, an optimal supply flow rate, and an optimum discharge flow rate of the electrolytic solution based on the value received in the transmission step S20.

The control unit controls the supply valve 111 and the discharge valve 121 installed in the supply pipe 110 and the discharge pipe 120 based on the flow rate and flow rate of the electrolytic solution searched in the searching step S30, (S40) of forming the optimal flow path and flow rate of the electrolytic solution.

FIG. 7 shows a side view of a non-ferrous metal electrolytic smelting system according to a second embodiment of the present invention. 7, the negative electrode plate C and the positive electrode plate A are immersed and immersed in the electrolytic bath 100 in which the electrolytic solution is accommodated. The negative electrode plate C and the positive electrode plate A are spaced apart from the negative electrode plate C and the positive electrode plate A, An ion exchange membrane (400) is immersed between the cathode plate (C) and the anode plate (A).

The ion exchange membrane (400) may be either a cation exchange membrane or an anion exchange membrane or a cation exchange membrane and an anion exchange membrane at the same time by passing only one of a cation and an anion.

The material of the ion exchange membrane 400 can be changed according to the metal to be extracted and it is possible to pass only ions, so that it is possible to prevent the impurities from being electrodeposited on the anode plate (C) and the anode plate (A).

At this time, in the positive electrode plate (A) used in the non-ferrous metal electrolytic smelting system of the present invention, a metal coating layer may be formed on the top surface of the positive electrode plate (A). The metal coating layer may include one or more selected from the group consisting of titanium (Ti), ruthenium (Ru), iridium (Ir), platinum (Pt), manganese (Mn), and tantalum (Ta).

In this case, one or two or more of them may be formed by forming a metal coating layer of a single material of titanium (Ti), ruthenium (Ru), iridium, platinum, manganese and tantalum, Or an alloy formed by these metals.

When the metal coating layer is touched on the upper surface of the positive electrode plate A, it is possible to prevent the separation of the positive electrode plate A by the metal coating layer, and the purity of the metal to be extracted can be increased. In addition, since the metal used for the metal coating layer has a relatively high electrical conductivity, it is possible to lower the voltage required for electrolytic smelting by increasing the electric conductivity and consequently to reduce power consumption.

Further, the positive electrode plate (A) used in the non-ferrous metal electrolytic smelting system of the present invention can form irregularities on its surface. It is possible to increase the binding force between the positive electrode plate (A) and the metal coating layer by unevenness.

More specifically, the unevenness formed on the surface of the positive electrode plate A may have a surface roughness (Ra) of 0.1 to 100 탆, specifically 1 to 60 탆. When the unevenness formed on the surface of the positive electrode plate A satisfies the above range, the adhesion force between the surface of the positive electrode plate A and the metal coating layer is further improved to prevent the detachment of the metal coating layer due to long- can do. Furthermore, even if expansion and contraction due to temperature changes that may occur during the electrolytic smelting process are repeated, the adhesion between the positive electrode plate (A) and the metal coating layer is high, so that occurrence of cracks due to the difference in thermal expansion coefficient can be prevented, The positive electrode plate A can be used for a long period of time.

8 is a perspective view of a non-ferrous metal electrolytic smelting system according to a second embodiment of the present invention. 8, the positive electrode plate A and the negative electrode plate C having the energizing head 310 formed thereon are alternately inserted at regular intervals and the upper end edge of the energizing head 310 is inserted into the upper edge of the electrolytic bath 100, And an energizing bar 130 for supplying current to the energizing head 310 is further provided.

At this time, it is preferable that the conductive bar 130 is formed of copper (Cu) having high conductivity, but the material of the conductive bar 130 is not limited.

9, the current-carrying bar 130 has grooves formed in the longitudinal direction of the current-carrying bar 130. The current-carrying bars 130 are formed in the grooves, The head 310 is fitted. Therefore, the positive electrode plate (A) and the negative electrode plate (C) can be spaced apart from each other without interfering with each other.

10 is a perspective view of a non-ferrous metal electrolytic smelting system according to a third embodiment of the present invention. As shown in FIG. 10, a plate-shaped conductive bar 140 is placed in the electrolytic bath 100. The conductive bar 140 has a cathode insertion groove 141 and an anode insertion groove 142 alternately formed.

The negative electrode plate C and the positive electrode plate A are inserted into the cathode insertion groove 141 and the anode insertion groove 142 respectively and the negative plate C and the positive electrode plate A, The head 310 and the energizing bar 140 contact each other to supply current to the energizing head 310.

Further, a frame 150 for inserting the ion exchange membrane 400 is formed below the conductive bar 140. It is preferable that the frame 150 is formed on the lower surface of the conductive bar 140 and is formed between the cathode insertion groove 141 and the anode insertion groove 142. The cathode insertion groove 141, A plurality of the antenna insertion grooves 142 may be formed.

11 shows a cross-sectional view of a current-carrying bar of a non-ferrous metal electrolytic smelting system according to a third embodiment of the present invention. 11, the frame 150 is disposed between the cathode insertion groove 141 and the anode insertion groove 142, and is disposed in the height direction of the electrolytic bath 150 As shown in Fig.

Therefore, since the cathode plate (C) and the anode plate (A) are connected to each other, the cathode plate (C) and the anode insert groove (142) And the ion exchange membrane 150 can be positioned between the anode plate C and the anode plate A by the frame 150 with a predetermined gap therebetween.

The technical idea should not be construed to be limited to the above-described embodiment of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, such modifications and changes are within the scope of protection of the present invention as long as it is obvious to those skilled in the art.

100 electrolytes
110 supply pipe
111 Supply valve
120 outlet pipe
121 discharge valve
130, 140 Electric current bar
141 Cathode insertion groove
142 Anode insertion groove
150 frames
200 sludge treatment section
210 sludge discharge pipe
211 Sludge discharge valve
300 electrode plate
310 energizing head
320 hooks
400 ion exchange membrane
A positive plate
C negative plate

Claims (10)

An electrolytic bath containing an electrolytic solution and an electrode;
A positive electrode plate provided with at least one or more irregularities on the surface of the electrolytic cell and a coating layer formed of a metal selected from at least one of iridium, tantalum, and manganese on the surface of the irregularities;
At least one cathode plate installed at an interval and spaced apart from the cathode plate; And
A sludge treatment unit formed in the lower part of the electrolytic bath, the sludge treatment unit depositing the electrolytic bath sludge;
, ≪ / RTI &
The sludge treatment unit may include a sludge discharge pipe that is openable and closable at a lower end of the sludge discharge pipe and discharges the sludge to the outside. The opening / closing of the sludge discharge pipe may be determined depending on a value measured by a sensor And the sludge processing unit is narrowed in width as the width of the sludge processing unit decreases toward the bottom of the electrolytic cell.
delete delete delete The positive electrode plate according to claim 1,
And an energizing head which is supplied with a current from the outside at an upper end thereof, wherein the electrolytic bath is provided with a sludge disposal apparatus.
6. The electrolytic cell according to claim 5,
Further comprising an energizing bar provided at an upper end edge of the electrolytic cell and contacting the energizing head to supply current to the energizing head when the positive electrode plate or the negative electrode plate is inserted into the electrolytic cell. A non-ferrous metal electrolytic smelting system equipped with a device.
7. The plasma display apparatus according to claim 6,
Wherein a plurality of grooves are formed at predetermined intervals in a longitudinal direction of the current-carrying bar, and an end of the current-carrying head is fitted into the groove.
The non-ferrous metal electrolytic smelting system according to claim 1,
An ion exchange membrane disposed between the positive electrode plate and the negative electrode plate at a predetermined interval;
Further comprising a sludge treatment unit disposed under the electrolytic bath.
An electrolytic cell formed in the lower part of the electrolytic cell and having a narrowed section toward the lower part, a sludge treatment part in which the electrolytic bath inner sludge is deposited, and a sludge discharge pipe provided at the lower end of the sludge treatment part to discharge the sludge to the outside, And a sensor for measuring the weight of the sludge, wherein whether or not the sludge discharge pipe is opened or closed is determined from the measured value from the sensor, and at least one positive electrode plate accommodated in the electrolytic cell is provided with irregularities on its surface, A method for treating a sludge using a non-ferrous metal electrolytic smelting system, wherein a coating layer is formed on the surface of a metal selected from at least one of iridium, tantalum, and manganese,
An electrolytic smelting step in which an electrolytic smelting operation is started in the electrolytic bath;
A weight measuring step of measuring the weight of sludge generated in the electrolytic smelting step by a weight sensor provided in the sludge treating unit;
And a determination step of comparing the measured value with the reference value in the weight measurement step,
A discharging step of discharging the sludge to the outside by opening the sludge discharge pipe when the measured value is equal to or greater than a reference value in the determining step;
, ≪ / RTI &
Wherein when the reference value is greater than the value measured in the weighing step, the sludge discharge pipe is maintained in a closed state, and the weighing step is carried out, wherein the non-ferrous metal electrolytic solution A sludge treatment method using a smelting system. delete

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