KR102678869B1 - manufacturing apparatus of copper foil for anode materials - Google Patents

Abstract

The present invention relates to an apparatus for manufacturing copper foil material for anode materials.
The apparatus for manufacturing copper foil material for an anode material of the present invention has a cavity 11 with an open top formed therein to temporarily accommodate the molten refined copper therein, and the molten material temporarily accommodated in the cavity 11 is formed on the side wall. a tundish (10) having a discharge port (12) for discharge; A rotation drive device (20) connected to the lower part of the tundish (10) and horizontally rotating the tundish (10) to discharge the molten material discharged through the discharge port (12) radially around the tundish (10). ; It is located in the lower part of the tundish 10, the upper part is open, and the upper cooling space has an inner diameter larger than the outer diameter of the tundish 10 and accommodates the molten material radially discharged from the discharge port 12 ( 31a) is connected to the cylindrical upper case 31 formed inside, and the lower part of the upper case 31, and takes the shape of a cone with an inner diameter gradually decreasing as it goes downward, and falls from the receiving space 21. A lower case 32 is formed with a lower cooling space 32a to guide the fall of the melt, and an outlet 32b through which the melt is discharged is formed in the lower center, and along the lower circumference of the upper case 31. It is installed at regular intervals and is configured to receive coolant from the outside through the first coolant supply pipe (33a) and spray the coolant into the upper cooling space (31a), upward toward the upper wall of the upper case (31) opposite the installation location. It is installed at an angle to rapidly cool the melt by contacting the coolant with the molten material discharged from the discharge port 12 and falling, and induces an upward flow of the coolant inside the upper cooling space (31a), causing the coolant heated in contact with the melt to flow to the upper part. An internal cooling tank (30) consisting of a plurality of coolant spray nozzles (33) that allow the coolant to be discharged beyond the upper wall of the case (31); The inner peripheral surface is spaced apart from the internal cooling tank 30 to form an external cooling space 41 between the internal cooling tank 30, and a second coolant supply pipe 42 through which coolant is supplied is connected to one side of the spray nozzle ( The external cooling tank 40 induces a downward coolant flow inside the external cooling space 41 and an upward coolant flow inside the lower cooling space 32a due to the upper and lower temperature difference along with the coolant sprayed from 33). and; One side is located at the lower part of the outlet (32b), and the other side extends upward from one side and protrudes outside the external cooling tank (40), and is a transfer conveyor (50) that transfers the copper foil material cooled and manufactured in the internal cooling tank (30). ); It is composed of:
According to the present invention, it is possible to manufacture a material for copper foil using low-purity ordinary copper instead of high-purity wheat berry, and the melt is discharged radially from the discharge port by rotation of the tundish, and the discharged melt is continuously supplied. It is cooled through contact with coolant and manufactured into a copper foil material, making it possible to manufacture copper foil material of uniform quality with less change in bulk density and grain size compared to the collision plate impact method. By setting the temperature of the coolant supplied according to this method to a specific temperature, it is possible to control the size of the crystal grains and the bulk density. In addition, power consumption can be reduced by supplying coolant through heat exchange using a heat exchange tank.

Description

Apparatus for manufacturing copper foil material for cathode material {manufacturing apparatus of copper foil for anode materials}

In the present invention, when manufacturing copper foil for anode materials of secondary batteries, low-purity general copper is used instead of high-purity wheatberry, and the coolant consumption is minimized by applying the upward overflow method to the flow of coolant in the cooling tank. It relates to a copper foil material manufacturing device for anode materials that improves productivity by ensuring smooth cooling while manufacturing copper foil material of uniform quality.

Recently, the importance of copper foil is increasing as environmental regulations are strengthened and demand for electric vehicles increases.

Copper foil, also called battery foil, is considered a key material for secondary batteries used in electric vehicles. Copper foil for secondary batteries is considered a key component of electric vehicle batteries because it dissipates heat generated from the battery to the outside and serves as a support to maintain the shape of the electrode. In particular, copper foil is used as a thin film for the cathode material, which is the four core materials of electric batteries (anode material, cathode material, separator, and electrolyte).

Here, in order to increase the capacity of the secondary battery, the energy density per unit area must be increased, and for this, it is efficient to make the thickness of the copper foil thin so that the area per unit volume is larger and the weight is smaller.

This copper foil is largely manufactured using the roll rolling method and the electrolytic method. The roll rolling method has the disadvantage that production costs increase as the thickness becomes thinner, so the electrolytic method, which is a method of plating copper through electrolysis, is mainly used. We manufacture copper foil for secondary batteries.

At this time, copper foil for secondary batteries using the electrolytic method is generally supplied from electrolytic copper or Millbury-grade high-quality copper scrap, and is manufactured through a casting method, a method combining casting and rolling, or a method combining casting, rolling, and wire drawing. It can be manufactured by making a wire rod, washing and cutting the produced wire rod, and then dissolving it in a sulfuric acid solution, which is an electrolyte.

However, cut wire rods are manufactured through rolling, drawing, and cutting processes. During rolling and drawing, they are exposed to oil components such as rolling oil and drawing oil, so a cleaning process for degreasing is essential, and the process is complicated, so the cost of copper foil is high. As this increases, there is a problem with the supply of raw materials such as electrolytic copper or wheatberry-grade high-quality copper scrap.

As a technology to solve this problem, "Irregular copper material for electrolytic copper foil and method of manufacturing the same" (Korean Patent Publication No. 10-2521234, Patent Document 1) describes a collision device provided on a water tank after melting the copper raw material. A technology has been disclosed to produce an irregular copper material for electrolytic copper foil with an average grain size of 50 to 300 ㎛ and a bulk density of 1.0 to 3.0 g/cm3 by dropping it on a plate, dispersing it in the form of fine particles, and precipitating it in water.

In Patent Document 1, it was determined that when the grain size is less than 50㎛, surface passivation can be accelerated due to the high grain boundary density. As a result, the water in the water tank is used to solidify the molten copper that has already been dispersed in the form of fine particles by the impingement plate. used.

This is believed to be related to the fact that the crystal grain size decreases when molten copper comes into contact with low-temperature water.

In other words, it appears that the bulk density was controlled through a collision plate, and the average grain size was controlled by the water temperature in the water tank, which was not low.

However, in the case of large-scale continuous production, residues of previously collided molten copper remain on the collision plate, causing changes in the shape and arrangement of the collision plate, which inevitably lead to changes in bulk density.

In addition, based on the copper foil material that has been manufactured, the temperature of the water in the water tank continues to change, so the grain size continues to change, resulting in poor quality uniformity.

In addition, when the molten copper foil comes in contact with water, a large amount of water vapor is generated, causing a water vapor explosion. At this time, pores are generated and hardened into a shape with multiple horns, increasing the surface area. The temperature of the water is high. As this phenomenon occurs less often, the bulk density changes, and there is also the problem that the bulk density increases.

KR 10-2521234 (2023.04.10)

The apparatus for manufacturing copper foil material for an anode material of the present invention is intended to solve the problems arising from the above-mentioned prior art, and enables the production of copper foil material using low-purity general copper instead of high-purity wheat berry, but without the use of tundish. The molten material is discharged radially from the discharge port by rotation, and the discharged melt is cooled through contact with continuously supplied cooling water and manufactured into copper foil material. Compared to the impact plate impact method, the change in bulk density and grain size is small, resulting in quality. The goal is to be able to manufacture this uniform copper foil material.

This means that the inside of the cooling tank at the bottom of the tundish is filled with coolant from the bottom so that the water level reaches the top of the cooling tank. In addition, high-pressure coolant is sprayed around the inside of the cooling tank at an angle toward the top of the opposite wall, causing the coolant to come into contact with the molten body and be heated. This is possible by allowing coolant to flow over the upper part of the cooling tank wall to maintain constant cooling performance.

By setting the temperature of the coolant supplied according to this method to a specific temperature, it is possible to control the size of the crystal grains and the bulk density.

In addition, liquid oxygen is vaporized and supplied using a vaporizer to burn fuel to prevent solidification of the melt in the tundish, and the coolant that has overflowed the cooling tank is exchanged with the vaporizer to cool the coolant without requiring additional fuel or power. The goal is to make it easier to reduce production costs by achieving this.

In order to solve the above-described problem, the apparatus for producing copper foil material for an anode material of the present invention has a cavity 11 with an open top formed inside to temporarily accommodate the molten refined copper therein, and a cavity (11) on the side wall. a tundish (10) formed with a discharge port (12) through which the molten body temporarily accommodated in 11) is discharged; A rotation drive device (20) connected to the lower part of the tundish (10) and horizontally rotating the tundish (10) to discharge the molten material discharged through the discharge port (12) radially around the tundish (10). ; It is located in the lower part of the tundish 10, the upper part is open, and the upper cooling space has an inner diameter larger than the outer diameter of the tundish 10 and accommodates the molten material radially discharged from the discharge port 12 ( 31a) is connected to the cylindrical upper case 31 formed inside, and the lower part of the upper case 31, and takes the shape of a cone with an inner diameter gradually decreasing as it goes downward, and falls from the receiving space 21. A lower case 32 is formed with a lower cooling space 32a to guide the fall of the melt, and an outlet 32b through which the melt is discharged is formed in the lower center, and along the lower circumference of the upper case 31. It is installed at regular intervals and is configured to receive coolant from the outside through the first coolant supply pipe (33a) and spray the coolant into the upper cooling space (31a), upward toward the upper wall of the upper case (31) opposite the installation location. It is installed at an angle to rapidly cool the melt by contacting the coolant with the molten material discharged from the discharge port 12 and falling, and induces an upward flow of the coolant inside the upper cooling space (31a), causing the coolant heated in contact with the melt to flow to the upper part. An internal cooling tank (30) consisting of a plurality of coolant spray nozzles (33) that allow the coolant to be discharged beyond the upper wall of the case (31); The inner peripheral surface is spaced apart from the internal cooling tank 30 to form an external cooling space 41 between the internal cooling tank 30, and a second coolant supply pipe 42 through which coolant is supplied is connected to one side of the spray nozzle ( The external cooling tank 40 induces a downward coolant flow inside the external cooling space 41 and an upward coolant flow inside the lower cooling space 32a due to the upper and lower temperature difference along with the coolant sprayed from 33). and; One side is located at the lower part of the outlet (32b), and the other side extends upward from one side and protrudes outside the external cooling tank (40), and is a transfer conveyor (50) that transfers the copper foil material cooled and manufactured in the internal cooling tank (30). ); It is composed of:

In the above-described configuration, the coolant spray nozzle 33 is directed toward the opposite wall of the upper case 31 in a plane, but is oriented to deviate from the center of the upper case 31, and the coolant spray nozzles (33) are adjacent to each other. 33) are configured to deviate in the same direction, so that the coolant sprayed from the coolant spray nozzle 33 is configured to induce a spiral fluid flow around the center of the upper case 31.

In the above configuration, the spiral fluid flow is characterized in that it is configured to form the same direction as the rotation direction of the tundish 10.

In the above configuration, the height of the upper wall of the external cooling tank 40 is the same as the height of the upper wall of the upper case 31 of the internal cooling tank 30, so that the molten body is sprayed by the coolant spray nozzle 33. It is characterized by suppressing overheating of the coolant inside the external cooling space (41) by allowing the cooled coolant to pass over the upper wall of the upper case (31) and then continuously discharge over the upper wall of the external cooling tank (40). do.

In the above configuration, in order to prevent the melt inside the cavity 11 of the tundish 10 from solidifying, a heating device 60 is further provided to apply flame to the cavity 11 by supplying fuel and oxygen. There is a liquefied oxygen tank (70) in which the oxygen supplied to the heating device (60) is stored in a liquid state; A vaporizer (80) connected to the acidifying liquid oxygen tank (70) and the heating device (60) through a pipe and vaporizing liquid oxygen; The vaporizer 80 is installed inside, and the coolant discharged from the external cooling tank 40 is stored inside to exchange heat between the coolant and liquid oxygen passing through the vaporizer 80. It is characterized in that it is further provided with a heat exchange tank (90) to which the coolant spray nozzle (33) and the coolant supply pipe (42) are connected.

According to the present invention, it is possible to manufacture a material for copper foil using low-purity ordinary copper instead of high-purity wheat berry, and the melt is discharged radially from the discharge port by rotation of the tundish, and the discharged melt is continuously supplied. It is cooled through contact with coolant and manufactured into a copper foil material, making it possible to manufacture copper foil material of uniform quality with less change in bulk density and grain size compared to the collision plate impact method.

This means that the inside of the cooling tank at the bottom of the tundish is filled with coolant from the bottom so that the water level reaches the top of the cooling tank. In addition, high-pressure coolant is sprayed around the inside of the cooling tank at an angle toward the top of the opposite wall, causing the coolant to come into contact with the molten body and be heated. This is possible by allowing coolant to flow over the upper part of the cooling tank wall to maintain constant cooling performance.

By setting the temperature of the coolant supplied according to this method to a specific temperature, it is possible to control the size of the crystal grains and the bulk density.

In addition, liquid oxygen is vaporized and supplied using a vaporizer to burn fuel to prevent solidification of the melt in the tundish, and the coolant that has overflowed the cooling tank is exchanged with the vaporizer to cool the coolant without requiring additional fuel or power. By achieving this, reduction of production costs can be easily achieved.

1 is a partially cut-away perspective view showing an example of the apparatus for manufacturing copper foil material for an anode material of the present invention.
Figure 2 is a schematic cross-sectional view of Figure 1.
Figure 3 is a side cross-sectional schematic diagram showing an example of supplying cooling water using a heat exchange tank in the present invention.
Figure 4 is a partially cut away perspective view of the structure of Figure 3.
Figure 5 is a plan view showing the arrangement of the coolant spray nozzle and the spray direction of coolant in the present invention.
Figure 6 is a partially cut perspective view showing an example of cooling water temperature control using a heat exchange tank and a temporary storage tank in the present invention.
Figure 7 is a photograph showing an example of a copper foil material for an anode material manufactured by the manufacturing apparatus of the present invention.
Figures 8 and 9 show test reports and partial excerpts obtained by requesting the Korea Testing and Research Institute to analyze the grain size of the copper foil material for anode materials manufactured according to the present invention.

Hereinafter, the apparatus for manufacturing copper foil material for an anode material of the present invention will be described in detail through the attached drawings.

As shown in Figures 1 and 2, the apparatus for producing copper foil material for anode material of the present invention includes a tundish 10, a rotation drive device 20, an internal cooling tank 30, an external cooling tank 40, and a transfer conveyor ( 50), and may further include a heating device 60, a liquefied oxygen tank 70, a vaporizer 80, and a heat exchange tank 90, as shown in FIGS. 3 and 4.

The tundish 10, which is a component of the present invention, has a cavity 11 with an open top formed therein to temporarily accommodate the molten refined copper therein, and the molten material temporarily accommodated in the cavity 11 is formed on the side wall. A discharge port 12 is formed for discharging.

Two or more discharge ports 12 are formed radially at regular intervals based on the center of the tundish 10.

A spout in the shape of a tube can be inserted into the discharge port 12 and installed to be replaceable.

The rotation drive device 20, which is a component of the present invention, is connected to the lower part of the tundish 10 and rotates the tundish 10 horizontally to cause the molten material discharged through the discharge port 12 to form the tundish 10. It is designed to discharge radially to the surroundings.

The rotation drive device 20 shown in FIG. 1 includes a seating member 21 installed below the tundish 10 on which the tundish 10 is seated, and extending in a vertical direction to the lower part of the seating member 21. There is a first rotation shaft 22 configured to rotate vertically, a power transmission device 23 located below the first rotation shaft 22 to convert the horizontal rotation force into a vertical rotation force, and the power transmission device 23 ) and a second rotation shaft 24 that extends horizontally and rotates horizontally on one side, and a drive motor 25 that is connected to the second rotation shaft 24 and rotates the second rotation shaft 24. .

Here, the power transmission device 23 may be composed of a pair of bevel gears that engage and rotate with each other.

If the rotation drive device 20 is intended to horizontally rotate the tundish 10, it is not limited by the drawings and various known rotation drive devices can be applied.

The internal cooling tank 30, which is a component of the present invention, is manufactured from a copper foil material by cooling the molten material discharged from the tundish 10 by falling and contacting cooling water.

In the present invention, the internal cooling tank 30 induces an upward flow of coolant inside the upper cooling space 31a, allowing the coolant heated in contact with the molten body to be discharged beyond the upper wall of the upper case 31. do.

The internal cooling tank 30 for this purpose is composed of an upper case 31, a lower case 32, and a coolant spray nozzle 33.

The upper case 31 has a cylindrical shape, and its outer peripheral surface is connected to the external cooling tank 40 through a connecting member.

This internal cooling tank 30 is open at the top to allow melt to flow into the top, and as shown in the figure, has an inner diameter larger than the outer diameter of the tundish 10, and the melt is discharged radially from the discharge port 12. An upper cooling space 31a is formed inside.

The lower case 32 is integrally connected to the lower part of the upper case 31 and has a conical shape with an inner diameter that gradually decreases as it goes downward, and is a lower cooling space that guides the fall of the molten material falling from the receiving space 21. (32a) is formed.

An outlet 32b is formed in the lower center of the lower case 32 through which the molten body (copper foil material) hardened in contact with the coolant is discharged.

As shown in the drawing, a plurality of coolant spray nozzles 33 are installed at regular intervals along the lower circumference of the upper case 31. They receive coolant from the outside and spray the coolant into the upper cooling space 31a. It is made to do so.

These coolant spray nozzles (33) are connected to a single circular pipe (33c) provided around the upper case (31), and a first coolant supply pipe (33a) is provided to supply coolant to this circular pipe (33c). It can be done as much as possible.

In the drawing, the circular pipe 33c is made in the form of a square cross-section, and the coolant spray nozzle 33 is shown partially accommodated inside the square cross-section, but it is not limited by the drawing.

A first control valve (33d) that can control the supply of coolant and a first supply pump (33b) for supplying coolant are installed in the first coolant supply pipe (33a) for supplying coolant to the circular pipe (33c). It can be.

These coolant spray nozzles 33 are installed inclined upward toward the upper wall of the upper case 31 on the opposite side of the installation location, and are configured to rapidly cool the melt by contacting the coolant with the melt discharged from the discharge port 12 and falling. .

The coolant inside the internal cooling tank 30 is filled by allowing it to rise from the inside through the discharge port 32b, and the temperature of the upper part of the lower cooling space 32a becomes higher than the lower part due to heat exchange with the molten body.

Therefore, the temperature of the cooling water at the top of the upper cooling space (31a) is considerably higher than that at the outlet (32b), so the cooling efficiency may be relatively low, and the physical properties of the copper foil material manufactured due to the temperature difference between the upper and lower parts It becomes difficult to keep it constant.

However, since the coolant spray nozzle 33 is located at the bottom of the upper case 31 and installed inclined upward, it is possible to supply coolant at a much lower temperature than the coolant filling from the outlet (32b), thereby allowing the coolant in the upper cooling space (31a) to be supplied. By lowering the coolant temperature, instantaneous cooling efficiency can be increased, and the grain size can be reduced through contact with low-temperature coolant.

More preferably, the crystal grain size can be adjusted by adjusting the temperature of the coolant sprayed from the coolant spray nozzle 33 according to the needs of the company supplying the copper foil material, and the rapid water vapor generated when the coolant and the molten material are in instantaneous contact. By controlling the activity and its degree, it is possible to control the degree of pore development and sharp protrusion development of the copper foil material.

At this time, as shown in FIG. 5, the coolant spray nozzle 33 is directed toward the opposite wall of the upper case 31 in a plane, deviating from the center of the upper case 31, and is configured to form a direction that deviates from the center of the upper case 31. The coolant spray nozzles (33) are configured to deviate in the same clockwise or counterclockwise direction so that the coolant sprayed from the coolant spray nozzles (33) induces a spiral fluid flow based on the center of the upper case (31). It is more desirable.

This prevents the movement path of the high-pressure coolant sprayed from each coolant spray nozzle 33 from colliding and failing to reach the upper surface of the upper case 31 at high pressure, and allows it to smoothly reach the upper area. (31) The upper surface rotates in a certain direction on a plane, allowing cooling efficiency to be maintained evenly.

In addition, it is preferable that the spiral fluid flow is in the same direction as the rotation direction of the tundish 10 so that cooling efficiency can be more constant.

The external cooling tank 40, which is a component of the present invention, has an inner peripheral surface spaced apart from the internal cooling tank 30, forming an external cooling space 41 between the internal cooling tank 30, and a cooling water supply on one side. 2The coolant supply pipe (42) is connected.

The temperature difference between the upper and lower coolant along with the coolant sprayed from the coolant spray nozzle 33 induces a downward coolant flow inside the external cooling space 41 and an upward coolant flow inside the lower cooling space 32a. You can do it.

In addition, a second control valve 42a to control whether or not coolant is supplied and a second supply pump 42b to supply coolant may be installed in the second coolant supply pipe 42.

At this time, the second coolant supply pipe 42 may supply coolant at the same temperature as the coolant inside the coolant spray nozzle 33, or it may supply coolant at different temperatures.

In addition, even if water is supplied from the same water source, it can be supplied at different temperatures by adding a temperature control device or using a heat exchanger.

In addition, the external cooling tank 40 may have an inclined protrusion 44 formed on one side to accommodate the upper part of the transfer conveyor 50 that is inclined upward on one side.

In addition, a coolant discharge pipe 43 may be connected to the lower part of the external cooling tank 40 to forcibly discharge coolant.

A third control valve 43a may be installed in the coolant discharge pipe 43 to control whether or not coolant is discharged.

Alternatively, the external discharge of the coolant inside the external cooling tank 40 may be discharged beyond the upper wall of the external cooling tank 40, like the internal cooling tank 30.

In this case, the height of the upper wall of the external cooling tank 40 is the same as the height of the upper wall of the upper case 31 of the internal cooling tank 30, and the coolant that cools the molten body by spraying from the coolant spray nozzle 33 After passing over the upper wall of the upper case 31, it is discharged continuously over the upper wall of the external cooling tank 40, so that overheating of the coolant inside the external cooling space 41 can be further suppressed.

The transfer conveyor 50, which is a component of the present invention, has one side located below the discharge port 32b, and the other side extends upward from one side and protrudes outside the external cooling tank 40 to cool in the internal cooling tank 30. It is designed to transport the manufactured copper foil material.

Meanwhile, in order to prevent the melt inside the cavity 11 of the tundish 10 from solidifying, a heating device 60 that applies flame to the cavity 11 is provided.

The heating device uses raw materials such as LPG, LNG, and petroleum as fuel and generates a flame under the supply of oxygen.

At this time, in order to maximize oxygen supply efficiency, a liquefied oxygen tank 70 in which oxygen supplied to the heating device 60 is stored in a liquid state, an oxygen liquefied oxygen tank 70, a heating device 60, and piping are installed. It is connected through and may be provided with a vaporizer 80 that vaporizes liquid oxygen.

Here, in addition to the heating device 60, the liquefied oxygen tank 70 can be used to supply oxygen in a furnace for producing a molten body.

Meanwhile, the temperature of the coolant in the internal cooling tank 30 and the external cooling tank 40 rises very easily because it cools the high-temperature molten body exceeding 1,000°C. Therefore, low-temperature coolant is continuously replenished and the heated coolant is added. Since it must be recovered, a cooling device is required, and the operation of this cooling device requires considerable power.

Accordingly, as shown in Figures 4 and 5, the coolant that has overflowed the upper wall of the external cooling tank 40 flows into the outside of the external cooling tank 40, and is connected to the coolant discharge pipe 43 to flow into the external cooling tank 40. It is provided with a temporary storage tank 91 in which the cooling water discharged from the cooling tank 40 is temporarily stored, and the vaporizer 80 is installed inside and connected to the temporary storage tank 91 through a pipe. The cooling water inside the temporary storage tank 91 is configured to be stored internally, and a heat exchange tank 90 configured to heat exchange the cooling water with liquid oxygen passing through the vaporizer 80 may be provided.

This heat exchange tank 90 is connected to the coolant spray nozzle 33 and the second coolant supply pipe 42, so that the coolant heat exchanged with the carburetor 90 is supplied to the coolant spray nozzle 33 and the second coolant supply pipe 42. As a result, rapidly cooled low-temperature cooling water can be supplied into the internal cooling tank 30 and the external cooling tank 40.

This allows cooling water to be quickly cooled and supplied without the need for a separate power-consuming cooling device, thereby reducing production costs for manufacturing copper foil materials.

Meanwhile, the pipe for supplying the coolant cooled in the heat exchange tank 90 to the first coolant supply pipe 33a and the second coolant supply pipe 42 is a single coolant recovery pipe 92 shown in FIGS. 3 and 4. It can be configured.

However, in this case, since the temperature inside the heat exchange tank 90 may not be kept constant, it is difficult to manufacture copper foil material of uniform quality.

In addition, there is a problem in that it is difficult to change manufacturing conditions because coolant at the same temperature has to be supplied to the inside of the internal cooling tank 30 and the external cooling tank 40.

In order to solve this problem, as shown in FIG. 6, the coolant recovery pipe 92 is composed of two first coolant recovery pipes 92a and second coolant recovery pipes 92b, and the first coolant recovery pipe 92b is The pipe (92a) is connected to the first coolant supply pipe (33a), and the second coolant recovery pipe (92b) is connected to the second coolant supply pipe (42), while the temporary storage tank (91) is connected to the first coolant supply pipe (33a). A first supplement pipe (93) and a second supplement pipe (94) connected to the coolant recovery pipe (92a) and the second coolant recovery pipe (92b) are installed, and the first coolant recovery pipe (92a) and the first supplement pipe are installed. A control valve 95 may be installed in each pipe before the point where (93) is connected and the point where the second coolant recovery pipe (92b) and the second supplement pipe (94) are connected.

In addition, the first coolant supply pipe 33a and the second coolant supply pipe 42 can be configured to have a temperature sensor 96 installed to measure the temperature of the internal coolant.

In addition, the temperature sensor 96 and the control valves 95 are electrically connected to a control device (not shown) to control the opening and closing of each control valve 95 according to the temperature value measured by the temperature sensor 96. By mixing the coolant heat-exchanged in the heat exchange tank 90 with the coolant temporarily stored inside the temporary storage tank, the temperature of each coolant supplied to the internal cooling tank 30 and the external cooling tank 40 can be adjusted.

This configuration not only enables continuous production while minimizing power consumption for cooling, but also controls the temperature of the coolant supplied to the internal cooling tank 30 and the external cooling tank 40 to determine the cathode temperature, such as bulk density or grain size. It is possible to control the main properties of reused copper foil materials and provide them to customers.

Hereinafter, a process for manufacturing a copper foil material for an anode material according to the present invention will be described.

1. Discharge stage

The refined copper melt is supplied into the cavity 11 of the tundish 10, and the rotation drive device 20 is operated to rotate the tundish 10.

When the tundish 10 rotates, the molten material is discharged radially through the discharge port 12 on the side wall.

2. Cooling step

Meanwhile, the internal cooling tank 30 and the external cooling tank 40 are filled with cooling water up to the tops of both tanks, and the discharged molten mass is brought into contact with the cooling water to cool and solidify the molten mass.

At this time, at the same time as the rotation drive device 20 operates, high-pressure supply of coolant through the coolant spray nozzle 33 is initiated to induce an upwardly inclined flow of coolant inside the internal cooling tank 30, thereby increasing the temperature due to contact with the molten body. The coolant that has risen is discharged beyond the upper wall of the internal cooling tank (30), and coolant is continuously supplied from the lower part of the internal cooling tank (30).

Cooling water is supplied from the lower part of the internal cooling tank 30 by supplying the cooling water into the external cooling tank 40 through the above-described second cooling water supply pipe 42.

3. Transfer stage

In addition to supplying coolant to the rotation drive device 20 and the coolant spray nozzle 33, the transfer conveyor 50 is operated to transfer the copper foil material that solidifies along the inside of the internal cooling tank 30 and falls through the discharge port 32b. It is transferred through the conveyor 50 and transferred to the subsequent process.

Meanwhile, while the discharge step is in progress, the heating device 60 is operated to prevent the melt from hardening. As described above, when liquid oxygen is vaporized and supplied to the heating device 60, the vaporizer 80 is discharged. It is installed inside the heat exchange tank (90) where the coolant is stored, and the coolant is heat-exchanged with liquid oxygen in the vaporizer (80) and then supplied to the first coolant supply pipe (33a) and the second coolant supply pipe (42).

In addition, in the case of the embodiment shown in FIG. 6, as described above, the opening and closing of each control valve 95 is controlled through a control device according to the temperature value detected by the temperature sensor 96, thereby controlling the first coolant supply pipe 33a and the first coolant supply pipe 33a. 2. By individually controlling the coolant temperature inside the coolant supply pipe 42, it is possible to manufacture a copper foil material with desired physical properties.

Figure 7 shows a copper foil material for an anode material manufactured by this manufacturing method, and Figures 8 and 9 are test reports regarding the grain size of the copper foil material manufactured by the present invention.

As can be seen in Figure 7, it can be seen that it was manufactured by being transformed into a popcorn-like shape with sharp protrusions protruding without a collision plate through instantaneous contact with low-temperature coolant.

As can be seen from the test report, it can be seen that it is possible to manufacture copper foil material with very small grain sizes.

In addition, as a result of measuring the weight of the manufactured copper foil material filled inside a cube measuring 10 cm in width, length, and height, it was found that it was possible to manufacture it by deriving it to a specific weight within the range of 0.5 to 7 kg depending on the temperature control of the coolant supplied in two parts. Could know.

10: Tundish 11: Cavity
12: discharge port 20: rotation drive device
21: Seating member 22: First rotation axis
23: Power transmission device 24: Second rotation shaft
25: Drive motor 30: Internal cooling tank
31: upper case 31a: upper cooling space
32: lower case 32a: lower cooling space
32b: outlet 33: coolant spray nozzle
33a: first coolant supply pipe 33b: first supply pump
33c: circular pipe 33d: first control valve
40: external cooling tank 41: external cooling space
42: Second coolant supply pipe 42a: Second control valve
42b: second supply pump 43: cooling water discharge pipe
43a: Third control valve 44: Protrusion
50: transfer conveyor 60: heating device
70: Liquid oxygen tank 80: Vaporizer
90: heat exchange tank 91: temporary storage tank
92: Cooling water recovery pipe 92a: First cooling water recovery pipe
92b: Second cooling water recovery pipe 93: First supplement pipe
94: Second supplement pipe 95: Control valve
96: Temperature sensor

Claims (5)

In the apparatus for manufacturing copper foil material for anode material,
A cavity 11 with an open top is formed inside to temporarily accommodate the molten refined copper therein, and a discharge port 12 is formed on the side wall to discharge the molten material temporarily accommodated in the cavity 11. tundish (10);
A rotation drive device (20) connected to the lower part of the tundish (10) and horizontally rotating the tundish (10) to discharge the molten material discharged through the discharge port (12) radially around the tundish (10). ;
An upper cooling space ( 31a) is connected to the cylindrical upper case 31 formed inside, and the lower part of the upper case 31, and takes the shape of a cone with an inner diameter gradually decreasing as it goes downward, and falls from the receiving space 21. A lower case 32 is formed with a lower cooling space 32a to guide the fall of the melt, and an outlet 32b through which the melt is discharged is formed in the lower center, and along the lower circumference of the upper case 31. It is installed at regular intervals and is configured to receive coolant from the outside through the first coolant supply pipe (33a) and spray the coolant into the upper cooling space (31a), upward toward the upper wall of the upper case (31) opposite the installation location. It is installed at an angle to rapidly cool the melt by contacting the coolant with the molten material discharged from the discharge port 12 and falling, and induces an upward flow of the coolant inside the upper cooling space (31a), causing the coolant heated in contact with the melt to flow to the upper part. An internal cooling tank (30) consisting of a plurality of coolant spray nozzles (33) that allow the coolant to be discharged beyond the upper wall of the case (31);
The inner peripheral surface is spaced apart from the internal cooling tank 30 to form an external cooling space 41 between the internal cooling tank 30, and a second coolant supply pipe 42 through which coolant is supplied is connected to one side of the coolant spray nozzle. The external cooling tank 40 induces a downward coolant flow inside the external cooling space 41 and an upward coolant flow inside the lower cooling space 32a due to the upper and lower temperature difference together with the coolant sprayed from (33). )and;
One side is located at the lower part of the outlet (32b), and the other side extends upward from one side and protrudes outside the external cooling tank (40), and is a transfer conveyor (50) that transfers the copper foil material cooled and manufactured in the internal cooling tank (30). ); and consists of,
In order to prevent the melt inside the cavity 11 of the tundish 10 from solidifying, a heating device 60 is further provided to apply flame to the cavity 11 by supplying fuel and oxygen,
a liquefied oxygen tank (70) in which oxygen supplied to the heating device (60) is stored in a liquid state;
A vaporizer (80) connected to the acidifying liquid oxygen tank (70) and the heating device (60) through a pipe and vaporizing liquid oxygen;
The vaporizer 80 is installed inside, and the coolant discharged from the external cooling tank 40 is stored inside to exchange heat between the coolant and liquid oxygen passing through the vaporizer 80. Characterized in that it is further provided with a heat exchange tank (90) to which the coolant spray nozzle (33) and the coolant supply pipe (42) are connected.
Equipment for manufacturing copper foil material for cathode materials.
According to clause 1,
The coolant spray nozzle 33 is directed toward the opposite wall of the upper case 31 in a plane, and is oriented away from the center of the upper case 31,
The coolant spray nozzles (33) adjacent to each other are configured to deviate in the same direction, so that the coolant sprayed from the coolant spray nozzles (33) induces a spiral fluid flow based on the center of the upper case (31). doing,
Equipment for manufacturing copper foil material for cathode materials.
According to clause 2,
Characterized in that the spiral fluid flow is in the same direction as the rotation direction of the tundish (10),
Equipment for manufacturing copper foil material for cathode materials.
According to clause 1,
The height of the upper wall of the external cooling tank 40 is the same as the height of the upper wall of the upper case 31 of the internal cooling tank 30,
The coolant, which has cooled the molten body by spraying from the coolant spray nozzle 33, passes over the upper wall of the upper case 31 and is then continuously discharged over the upper wall of the external cooling tank 40, thereby forming the inside of the external cooling space 41. Characterized in that it is configured to suppress overheating of the coolant of,
Equipment for manufacturing copper foil material for cathode materials.
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