KR20230174649A - A system for producting hydroxide lithium powder and hydroxide lithium powder production method using the system - Google Patents

Abstract

The lithium hydroxide powder production system and the lithium hydroxide powder production method using the same according to an embodiment of the present invention include at least one selected from moisture and magnetic materials, and are pulverized to collect pulverized objects used as raw materials for batteries. Object initial collection unit; A drying unit connected to the initial collection unit for the pulverized object and including a drying device provided to heat and dry the pulverized object collected in the initial collection unit; a dry pulverized object collection unit connected to the drying unit and provided to collect the dried pulverized object that has been dried in the drying unit; A grinding unit connected to the dry grinding object collection unit and including a grinding device provided to grind the dry grinding object collected in the dry grinding object collection unit to produce raw material powder; and connected to at least one selected from the initial collection unit, drying unit, dry grinding object collection unit, and grinding unit so that the grinding object collected in the initial collection unit of the grinding object can be transferred to the drying unit and the grinding unit. A compressed air supply unit including a compressed air supply line provided to supply compressed air from which at least one of moisture and carbon dioxide has been removed.

Description

Lithium hydroxide powder production system and lithium hydroxide powder production method using the same {A system for producing hydroxide lithium powder and hydroxide lithium powder production method using the system}

The present invention relates to a lithium hydroxide powder production system and a lithium hydroxide powder production method using the same, and more specifically, to a lithium hydroxide powder production system that can significantly reduce manpower and work time by automating the grinding process of lithium hydroxide, and It relates to a method for producing lithium hydroxide powder using this.

Lithium secondary batteries are already being commercialized not only for small-sized power sources such as mobile phones and laptops, but also for medium-sized or large-sized power sources such as automobiles and power storage purposes. Here, lithium hydroxide, along with lithium carbonate, is an essential material for lithium secondary batteries. In particular, lithium hydroxide is easy to synthesize with nickel, which increases battery capacity, and is mainly used for high-capacity electric vehicle batteries. Accordingly, there is a recent need for a lithium hydroxide powder manufacturing process to manufacture lithium secondary batteries.

Meanwhile, the method of inputting the pulverized object used in the conventional lithium hydroxide powder manufacturing process is an input method in which the operator opens the input valve of the drying device due to the high position of the drying device and allows the pulverized object to freely fall using a crane, etc. used.

Accordingly, it is judged that there is a need for technological development to improve the lithium hydroxide powder manufacturing process.

(Patent Document 0001) Republic of Korea Published Patent KR 10-2020-0126974 A ‘Method for producing lithium hydroxide powder, method for producing positive electrode active material for lithium secondary battery, and package’ (2020.11.09)

The present invention was created to solve the above-mentioned problems, and more specifically, by automating the grinding process of lithium hydroxide, the required manpower and work time can be significantly reduced, while removing moisture and magnetic substances contained in the lithium hydroxide raw material. The purpose is to provide a lithium hydroxide powder production system and a lithium hydroxide powder production method using the same.

A lithium hydroxide powder production system according to an embodiment of the present invention includes an initial collection unit for pulverized materials, which includes at least one selected from moisture and magnetic materials and is provided to collect the pulverized materials used as raw materials for batteries; A drying unit connected to the initial collection unit for the pulverized object and including a drying device provided to heat and dry the pulverized object collected in the initial collection unit; a dry pulverized object collection unit connected to the drying unit and provided to collect the dried pulverized object that has been dried in the drying unit; A grinding unit connected to the dry grinding object collection unit and including a grinding device provided to grind the dry grinding object collected in the dry grinding object collection unit to produce raw material powder; and connected to at least one selected from the initial collection unit, drying unit, dry grinding object collection unit, and grinding unit so that the grinding object collected in the initial collection unit of the grinding object can be transferred to the drying unit and the grinding unit. A compressed air supply unit including a compressed air supply line provided to supply compressed air from which at least one of moisture and carbon dioxide has been removed.

More specifically, the lithium hydroxide powder manufacturing system includes a magnetic material removal unit provided at at least one selected location of the drying unit and the grinding unit to collect and remove magnetic substances contained in the grinding object. It is characterized by including.

More specifically, the lithium hydroxide powder production system further includes a raw material powder packaging unit provided to vacuum package the raw material powder transferred from the grinding unit, wherein the grinding unit is connected to the dry grinding object collection unit. a dry grinding object storage device provided to temporarily store the dry grinding objects collected in the dry grinding object collection unit; a dry grinding object supply device provided to supply the dry grinding object stored in the dry grinding object storage device to the grinding device; a raw material powder dust collection device provided to collect the raw material powder generated in the grinding device; and a raw material powder classifier provided to transfer the raw material powder collected in the raw material powder dust collection device to the raw material powder packaging unit.

More specifically, the magnetic material removal unit is provided at at least one position selected from the inlet and outlet of the drying device, and at least one selected from the rear end of the dry grinding object supply device and the rear end of the raw material powder classification device. It is characterized by being provided in the above position.

More specifically, the drying device is rotated inside the drying device to prevent the pulverizing object from sticking inside the drying device when drying the pulverizing object transported inside the drying device to crush the pulverizing object. It includes a drying unit provided to stir, wherein the drying unit includes: a drive shaft extending a predetermined length inside the drying device and driven to rotate up and down; a first stirring blade coupled to the drive shaft and rotating around the drive shaft as a rotation axis; and a second stirring blade coupled to the drive shaft, rotating with the drive shaft as a rotation axis, and having a diameter smaller than that of the first stirring blade. The spiral direction of the first stirring blade and the It is characterized in that the spiral directions of the second stirring blades are formed in opposite directions.

More specifically, the initial collection unit for the pulverized object is connected to the drying device and is provided to transfer the pulverized object collected in the initial collection unit for the pulverized object to the inlet of the drying device. It includes; , the compressed air supply unit is formed to extend from the compressed air supply line and is connected to the transfer line for the pulverized object so as to transport the pulverized object collected in the initial collection unit of the pulverized object to the inlet side of the drying device, and the pulverized object It is characterized in that it includes a compressed air auxiliary supply line provided to supply auxiliary air to the transfer line.

More specifically, the compressed air supply unit includes a moisture drying device provided to remove moisture contained in the compressed air; and a carbon dioxide removal device provided to remove carbon dioxide contained in the compressed air. It is characterized in that it is provided to include at least one selected from among.

The method for producing lithium hydroxide powder according to an embodiment of the present invention includes an initial collection part of the grinding object, a drying part including a drying device, a grinding part including a dry grinding object supply device and a raw material powder classifier, and a compressed air supply portion. A method of manufacturing lithium hydroxide powder using a system comprising: supplying compressed air formed in the compressed air supply unit to at least one selected from an initial collection unit, a drying unit, and a grinding unit of the pulverized object; After the compressed air supply step, a pulverizing object supply step of supplying the pulverizing object collected in the pulverizing object initial collection unit to the drying unit; After the step of supplying the pulverized object, a drying step of heating and drying the pulverizing object to remove moisture contained in the pulverizing object transferred to the drying unit to produce a pulverizing object from which moisture has been removed; and, after the step of drying the grinding object, grinding the dried object in the drying unit to produce raw material powder.

More specifically, the step of drying the object to be shredded includes, after the step of supplying the object to be shredded, a first magnetic material removal step of removing the magnetic material contained in the object to be shredded, and the step of pulverizing the object to be shredded includes: After the object drying step, a secondary magnetic material removal step of removing the magnetic material contained in the raw material powder.

More specifically, the first magnetic material removal step is performed at at least one location selected from the inlet and outlet of the drying device, and the secondary magnetic material removal step is performed at the rear end and the dry grinding object supply device. It is characterized in that it is performed at at least one selected position among the rear ends of the raw material powder classification device.

The lithium hydroxide powder manufacturing system according to an embodiment of the present invention is provided with an initial collection unit for the grinding object, a drying unit, a dry grinding object collection unit, a grinding unit, and a compressed air supply unit, thereby grinding the lithium hydroxide without deteriorating the lithium hydroxide. It is possible to provide an effect that can be achieved.

In addition, the lithium hydroxide powder manufacturing system according to an embodiment of the present invention is provided with the magnetic material removal unit, thereby removing the magnetic material contained in the grinding object or the raw material powder, thereby improving the effectiveness of the battery manufactured from the raw material powder. It is possible to provide an effect that can significantly improve.

In addition, the lithium hydroxide powder manufacturing system according to an embodiment of the present invention provides the effect of producing lithium hydroxide with a wide range of grinding degrees depending on the compressed air pressure and classification speed through the grinding device.

In addition, the lithium hydroxide powder manufacturing system according to an embodiment of the present invention can provide the effect of effectively removing magnetic substances contained in lithium hydroxide by providing the magnetic substance removal unit on the drying unit and the grinding unit. do.

In addition, the lithium hydroxide powder production system according to an embodiment of the present invention is capable of preventing the pulverization object transferred into the drying device through the drying unit from sticking inside the drying device while drying the pulverizing object. After completion of drying of the object, it is possible to provide the effect of easily discharging the dried and pulverized object to the dry and pulverized object collection unit.

In addition, in the lithium hydroxide powder production system according to an embodiment of the present invention, the first and second stirring blades of the drying unit have spiral directions in opposite directions, so that the object to be pulverized inside the drying device This can provide the effect of being able to stir more easily so that it does not stick inside the drying device.

In addition, the lithium hydroxide powder production system according to an embodiment of the present invention is provided with the auxiliary air supply pipe, thereby enabling easy transfer of the grinding object to the inlet of the drying device installed at a high position. This has the effect of significantly reducing the manpower and work time required and simultaneously eliminating the risk of safety accidents that may occur due to work at heights by preventing people from directly inserting the shredded material inside using a crane, etc. can be provided.

In addition, in the lithium hydroxide powder manufacturing system according to an embodiment of the present invention, the compressed air supply unit supplies compressed air from which moisture and carbon dioxide have been completely removed to the initial collection unit, drying unit, and grinding unit of the pulverized object. It is possible to provide the effect of transferring lithium hydroxide to the drying section and grinding section without deteriorating the lithium hydroxide.

In addition, the method for producing lithium hydroxide powder according to an embodiment of the present invention includes the steps of supplying compressed air, supplying a pulverizing object, drying the pulverizing object, and pulverizing the pulverizing object, so that lithium hydroxide is pulverized without deterioration of the lithium hydroxide. It is possible to provide an effect that can be achieved.

In addition, by including the first magnetic material removal step (S310) and the second magnetic material removal step (S410), the magnetic material contained in lithium hydroxide can be effectively removed through the second magnetic material removal step. It is possible to provide effective effects.

Figure 1 is a schematic diagram of a lithium hydroxide powder manufacturing system according to an embodiment of the present invention.
Figure 2 is a perspective view showing a drying device constituting the drying unit of the lithium hydroxide powder manufacturing system according to an embodiment of the present invention.
Figure 3 is a perspective view showing a drying unit inside the drying apparatus of the lithium hydroxide powder production system according to an embodiment of the present invention.
Figure 4 is a block flow chart illustrating the progress of the method for producing lithium hydroxide powder according to an embodiment of the present invention.
Figure 5 is a block flow chart illustrating the progress of the lithium hydroxide powder manufacturing method including the magnetic material removal step according to an embodiment of the present invention.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete and to provide a general understanding of the technical field to which the present invention pertains. It is provided to fully inform those with knowledge of the scope of the invention, and the present invention is only defined by the scope of the claims.

Additionally, the terms used in this specification are for describing embodiments and are not intended to limit the present invention.

As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprises” and/or “comprising” does not exclude the presence or addition of elements other than the mentioned elements.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings that can be commonly understood by those skilled in the art to which the present invention pertains.

First, with reference to FIG. 1, the lithium hydroxide powder manufacturing system of the present invention will be described.

Figure 1 is a schematic diagram of a lithium hydroxide powder production system according to an embodiment of the present invention.

As shown in FIG. 1, the lithium hydroxide powder production system 1000 of the present invention includes an initial collection unit 100 for grinding objects, a drying unit 200, a collection unit 300 for dry grinding objects, a grinding unit 400, It includes a compressed air supply unit 500, a raw material powder packaging unit 600, and a magnetic material removal unit 700.

First, the initial collection unit 100 of the pulverized material includes at least one selected from moisture and magnetic materials and is provided to collect the pulverized material used as a raw material for a battery.

At this time, it is preferable that the object to be pulverized is lithium hydroxide.

In addition, the grinding object is collected in the initial collection unit in a state that is not completely purified and contains a large amount of moisture and magnetic substances.

In addition, the initial collection unit 100 for the pulverized material includes a transfer line 110 for the pulverized material.

Here, the shredded object transfer line 110 is connected to the drying device 210 of the drying unit 200 to transfer the shredded object collected in the initial collecting part 100 to the inlet of the drying device 210. It is characterized in that it is provided for transport.

Subsequently, the drying unit 200 is connected to the initial collection unit 100 of the pulverized object.

In addition, the drying unit 200 is provided to remove moisture contained in the grinding object, and includes a drying device 210 that is provided to heat and dry the grinding object collected in the initial collection unit 100. It is characterized by including.

At this time, it is desirable to maintain a vacuum state inside the drying device 210.

Subsequently, the dry grinding object collection unit 300 is connected to the drying unit 200.

In addition, the dry grinding object collection unit 300 is characterized in that it is provided to collect the dry grinding object that has been dried in the drying unit 200.

Here, the dried pulverized object has a high temperature and is cooled within the dry pulverized object collection unit 300 for a predetermined period of time.

In addition, the dry grinding object collection unit 300 includes a dry grinding object transfer line 310 formed to transport the dry grinding object.

At this time, the dry grinding object transfer line 310 is connected to the lower part of the dry grinding object collection unit 300 and is provided to transport the dry grinding object to the grinding unit 400.

Subsequently, the grinding unit 400 is connected to the dry grinding object collection unit 300.

In addition, the grinding unit 400 is characterized by including a grinding device 430 provided to produce raw material powder by grinding the dry grinding objects collected in the dry grinding object collection unit 300.

Here, the pulverizing device 430 may pulverize the dry pulverizing target after receiving compressed air of a predetermined pressure supplied from the compressed air supply unit 500 in order to smoothly pulverize the dry pulverizing target.

In addition, the grinding unit 400 is characterized by including a dry grinding object storage device 410, a dry grinding object supply device 420, a raw material powder dust collection device 440, and a raw material powder classifying device 450.

First, the dry grinding object storage device 410 is connected to the dry grinding object collection unit 300 and is provided to temporarily store the dry grinding object collected in the dry grinding object collection unit 300.

At this time, the dry grinding object storage device 410 may be manufactured in the form of a hopper.

In addition, the dry grinding object storage device 410 is connected to the dry grinding object transfer line 310 from the dry grinding object collection unit 300 and is provided to receive the dry grinding object.

At this time, the dry pulverized object storage device 410 may be installed at a location extending approximately 4 m to 6 m upward from the ground.

More specifically, when the installation position of the dry pulverized object storage device 410 is less than 4 m, a problem occurs in which the installation space for the pulverizing unit 400 cannot be secured, and the dry pulverized object storage device 410 If the installation location exceeds 6m, problems may arise that make it difficult for users to enter, so the above-mentioned range must be satisfied.

Therefore, the dry pulverized objects collected in the dry pulverized object collection unit 300 are dry pulverized through the dry pulverized object transfer line 310 based on the air pressure of the compressed air delivered from the compressed air supply unit 500. It is desirable to transfer it to the upper input port of the object storage device 410.

In addition, the dry grinding object supply device 420 is characterized in that it is provided to supply the dry grinding object stored in the dry grinding object storage device 410 to the grinding device 430.

At this time, although not specifically shown in the drawing, the grinding device 430 may include a load cell that generates a weight signal, which is a signal measuring the weight of the dry grinding object introduced into the grinding device.

Here, the dry grinding object supply device 420 operates based on the weight signal, which is a signal acquired through the load cell of the grinding device 430, and supplies the dry grinding object storage device 410 to the grinding device 430. Can be operated to maintain or stop the feed progress of the stored dry grinding material.

Next, the raw material powder dust collection device 440 is characterized in that it is provided to collect the raw material powder generated in the grinding device 400.

At this time, the raw material powder dust collector 440 is equipped to filter and collect the raw powder scattered in the air.

Here, the air filtered by the raw material powder dust collector 440 may be discharged into the atmosphere through an exhaust fan.

In addition, the raw material powder classifier 450 is characterized in that it is provided to transfer the raw material powder dusted in the raw material powder dust collector 440 to the raw material powder packaging unit 600.

Accordingly, the pulverizing unit 400 is equipped with the pulverizing device 430, and thus depends on the air pressure of the compressed air delivered from the compressed air supply line 510, the nozzle diameter, and the speed of the raw material powder classifier 440. Accordingly, it is possible to provide the effect of producing the raw material powder with a wide range of grinding degrees.

Subsequently, the compressed air supply unit 500 is configured to transfer the grinding objects collected in the initial collection unit 100 to the drying unit 200 and the grinding unit 400. ), the drying unit 200, the dry grinding object collection unit 300, and the grinding unit 400, and are connected to at least one selected from the compressed air to supply compressed air from which at least one of moisture and carbon dioxide has been removed. It is characterized by including an air supply line (510).

Here, lithium hydroxide, which is the object to be pulverized, has the property of dissolving in water.

In addition, lithium hydroxide, which is the object to be pulverized, has the property of changing into lithium carbonate when it absorbs carbon dioxide.

Therefore, it is preferable that the compressed air is compressed air from which both moisture and carbon dioxide have been removed.

Next, the compressed air supply unit 500 includes a moisture drying device 530 and a carbon dioxide removal device 540.

Here, the moisture drying device 530 is characterized in that it is provided to remove moisture contained in the compressed air.

In addition, the carbon dioxide removal device 540 is characterized in that it is provided to remove carbon dioxide contained in the compressed air.

In addition, the compressed air supply unit 500 may include the following devices to generate compressed air capable of transporting lithium hydroxide, which is the object to be pulverized.

More specifically, the compressed air supply unit 500 may include an air compression device, a cooling device, a refrigerated drying device, and a compressed air storage device.

First, the air compression device is provided to suck in air and compress the sucked air.

Thereafter, the air compression device is equipped to separate the oil content of the compressed air and then the moisture.

Additionally, the air compression device is provided to transfer compressed air from which oil and moisture have been separated to a cooling device.

Next, the cooling device is provided to cool the compressed air transferred from the air compression device.

At this time, the compressed air transferred from the air compression device is hot and humid air containing dust and water vapor.

Therefore, the cooling device is provided to cool the transported compressed air and protect the refrigeration drying device provided at the rear through the atmospheric temperature.

Thereafter, the cooling device is provided to transfer the cooled compressed air to the refrigerated drying device.

Next, the refrigerated drying device is equipped to exchange heat with the refrigerant while the cooled compressed air moves along the internal flow path of the heat exchanger.

At this time, the refrigerated drying device is equipped to condense moisture and separate the cooled compressed air and moisture.

Thereafter, the refrigerated drying device is equipped to preheat compressed air from which moisture has been separated through a heater and then transfer it to the moisture drying device 530.

Subsequently, the moisture drying device 530 is equipped to remove moisture from the fine particles by passing the compressed air from which the moisture has been separated through an adsorbent provided inside the moisture drying device 530.

Thereafter, the moisture drying device 530 is equipped to transfer compressed air from which moisture has been completely separated to the carbon dioxide removal device 540.

Next, the carbon dioxide removal device 540 is equipped to remove particulate carbon dioxide by passing the compressed air from which the moisture has been completely separated through an adsorbent provided inside the carbon dioxide removal device 540.

Additionally, the compressed air storage device is provided to store compressed air in which moisture and carbon dioxide transferred from the carbon dioxide removal device 540 are completely separated.

Thereafter, the compressed air from which moisture and carbon dioxide stored inside the compressed air storage device have been completely removed is supplied to the initial collection unit 100, drying unit 200, and grinding unit 400 of the pulverized object through the compressed air header. It is provided.

here. The compressed air header is provided to be interconnected with the compressed air storage device and the compressed air supply line 510.

For this reason, the compressed air supply unit 500 supplies compressed air from which moisture and carbon dioxide have been completely removed to the initial collection unit 100, drying unit 200, and grinding unit 400 of the pulverizing object. It is possible to provide the effect of transferring lithium hydroxide to the drying unit 200 and grinding unit 400 without deteriorating the lithium hydroxide.

Next, the compressed air supply unit 500 includes a compressed air auxiliary supply line 520.

Here, the compressed air auxiliary supply line 520 extends from the compressed air supply line 510 to transport the pulverized objects collected in the initial collection unit 100 of the pulverized objects to the inlet side of the drying device 210. It is formed and connected to the crushing object transport line 110, and is characterized in that it is provided to supply auxiliary air to the grinding object transport line 110.

At this time, the height of the inlet of the drying device 210 may be provided at a position extending approximately 6 m to 8 m upward from the ground.

More specifically, when the installation position of the inlet of the drying device 210 is less than 6 m, a problem occurs in which the installation space for the drying unit 200 cannot be secured, and the dry grinding object storage device 410 If the installation location exceeds 8m, problems may arise that make it difficult for users to enter, so make sure to satisfy the above-mentioned range.

More preferably, the inlet of the drying device 210 may be formed at a position of about 7 m.

In addition, the lithium hydroxide powder manufacturing system 1000 includes the compressed air supply line 510 for supplying the compressed air without the operator having to directly input the grinding object into the inlet, and the compressed air auxiliary for supplying the auxiliary air. It is equipped to enable automatic injection using the vacuum pressure formed inside the supply line 520 and the drying device 210.

Therefore, the lithium hydroxide powder manufacturing system 1000 maintains the inside of the drying device 210 in a vacuum state, rather than using the conventional direct input method of the pulverized object, and provides a raw material storage and automatic injection device on the initial collection part of the pulverized object. It is equipped to use an automatic input method.

Accordingly, the lithium hydroxide powder manufacturing system 1000 is provided with the auxiliary air supply pipe 520, thereby enabling easy transfer of the grinding object to the inlet of the drying device 210 installed at a high position. By preventing people from directly inserting shredded objects into the drying device 210 using a crane, etc., the manpower and work time required can be significantly reduced, and at the same time, the risk of safety accidents that may occur due to work at heights. It is possible to provide an effect that can eliminate .

Next, the raw material powder packaging unit 600 is characterized in that it is provided to vacuum package the raw powder transferred from the grinding unit 400.

Here, the interior of the raw material powder packaging unit 600 is preferably made of aluminum to prevent deformation of the raw material powder.

Accordingly, the lithium hydroxide powder production system 1000 can provide the effect of packaging the raw material powder without deterioration of the raw material powder by providing the raw material powder packaging unit 600.

Next, the lithium hydroxide powder manufacturing system 1000 includes the magnetic material removal unit 700.

Here, the magnetic material removal unit 700 is provided at at least one position selected from the drying unit 200 and the grinding unit 400 to collect and remove magnetic substances contained in the grinding object. Do it as

In addition, the magnetic material removal unit 700 is characterized in that it is provided at at least one position selected from the inlet and outlet of the drying device 210.

In addition, the magnetic material removal unit 700 is characterized in that it is provided at at least one position selected from the rear end of the dry grinding object supply device 420 and the rear end of the raw material powder classifier 450.

That is, the lithium hydroxide powder manufacturing system 1000 is provided with the magnetic material removal unit 700, thereby improving the effectiveness of the battery manufactured from the raw material powder by removing the magnetic material contained in the grinding object or the raw material powder. It can provide significantly improved effects.

In addition, the lithium hydroxide powder production system 1000 can effectively remove magnetic substances contained in lithium hydroxide by providing the magnetic substance removal unit 700 on the drying unit 200 and grinding unit 400. It is possible to provide effective effects.

Next, the drying unit of the lithium hydroxide powder manufacturing system according to an embodiment of the present invention will be described with reference to FIGS. 2 and 3.

Figure 2 is a perspective view showing a drying device constituting the drying unit of the lithium hydroxide powder production system according to an embodiment of the present invention, and Figure 3 is a view of the inside of the drying device of the lithium hydroxide powder production system according to an embodiment of the present invention. This is a perspective view showing the drying unit.

As shown in Figures 2 and 3. The drying unit 200 of the lithium hydroxide powder manufacturing system 1000 of the present invention includes a drying device 210.

First, the drying device 210 is connected to the initial collection unit (not shown) of the pulverized objects and is provided to heat and dry the pulverized objects collected in the initial collection unit (not shown).

Here, the lithium hydroxide powder manufacturing system 1000 may include a vacuum forming unit.

More specifically, the vacuum forming unit may be provided with a vacuum pump to form a vacuum inside the drying device 210 and maintain it in a vacuum state.

here. The drying device 210 may be equipped with at least one heat oil boiler.

Additionally, the heat medium oil heated in the boiler may be provided to heat the inside of the drying device 210 to evaporate and dry moisture.

At this time, the evaporated moisture may be provided to discharge vapor through a filtration device such as a filter provided at the top of the drying device 210.

Additionally, the discharged vapor may pass through a condenser, be condensed, and then be stored in a condensate storage tank.

Next, the drying device 210 includes a drying unit 211.

At this time, the drying unit 211 is used to prevent the pulverized object from sticking inside the drying device 210 when drying the pulverized object transferred into the drying device 210. It is characterized by being provided to agitate the object to be pulverized by rotating it inside.

More specifically, the drying unit 211 is equipped to rotate so that the grinding object transferred into the drying device 210 can continuously move.

And, the drying unit includes a drive shaft 211a, a first stirring blade 211b, and a second stirring blade 211c.

Here, the drive shaft 211a is formed to extend a predetermined length inside the drying device 210 and is driven to rotate up and down.

In addition, the first stirring blade 211b is coupled to the drive shaft 211a and rotates using the drive shaft 211a as a rotation axis.

In addition, the second stirring blade 211c is coupled to the drive shaft 211a, rotates with the drive shaft 211a as a rotation axis, and has a diameter smaller than that of the first stirring blade 211b. .

Here, the drying unit 211 is characterized in that the spiral direction of the first stirring blade 211b and the spiral direction of the second stirring blade 211c are formed in opposite directions.

Accordingly, the lithium hydroxide system 1000 can prevent the pulverized object transferred into the drying device 210 through the drying unit 211 from sticking to the inside of the drying device 210 during drying. At the same time, after completion of drying of the pulverized object, it is possible to provide the effect of easily discharging the dried pulverized object to the dry pulverized object collection unit (not shown).

In addition, in the drying unit 211, the spiral directions of the first stirring blade 211b and the second stirring blade 211b are formed in opposite directions, so that the grinding object inside the drying device 210 is It is possible to provide the effect of allowing easier stirring to prevent sticking inside the drying device 210.

Next, the method for producing lithium hydroxide powder according to an embodiment of the present invention will be described in more detail with reference to FIG. 4.

Figure 4 is a block flow chart illustrating the progress of the method for producing lithium hydroxide powder according to an embodiment of the present invention.

As shown in FIG. 4, lithium hydroxide powder using a system including an initial collection unit for the pulverized object, a drying unit including a drying device, a pulverizing section including a dry pulverizing object supply device and a raw material powder classifier, and a compressed air supply section. The manufacturing method (S1000) includes a compressed air supply step (S100), a pulverization object supply step (S200), a pulverization object drying step (S300), and a pulverization step (S400).

First, the compressed air supply step (S100) is characterized by supplying the compressed air formed in the compressed air supply unit to at least one selected from the initial collection unit, drying unit, and grinding unit of the pulverized object.

In addition, the crushing object supply step (S200) is characterized in that the pulverized object collected in the initial collection unit of the pulverized object is supplied to the drying unit after the compressed air supply step (S100).

In addition, the grinding object drying step (S300) involves heating and drying the grinding object to remove moisture contained in the grinding object transferred to the drying unit after the grinding object supply step to produce a grinding object from which moisture has been removed. It is characterized by

Lastly, the grinding object grinding step (S400) is characterized in that, after the grinding object drying step, the dried grinding object in the drying unit is pulverized to produce raw material powder.

Here, the method of pulverizing the object to be pulverized (S1000) may further include a raw material powder packaging step of vacuum packaging the raw material powder generated in the pulverizing unit after the step of pulverizing the object to be pulverized (S400).

Accordingly, the method for producing lithium hydroxide powder (S1000) can provide the effect of allowing grinding of lithium hydroxide to proceed without deterioration of the lithium hydroxide, which is the grinding object.

Next, the method for producing lithium hydroxide powder according to an embodiment of the present invention will be described in more detail with reference to FIG. 5.

Figure 5 is a block flow chart illustrating the progress of the lithium hydroxide powder manufacturing method including the magnetic material removal step according to an embodiment of the present invention.

As shown in FIG. 5, the method for producing lithium hydroxide powder (S1000) includes an initial collection part of the pulverized object, a drying part including a drying device, a pulverizing part including a dry pulverizing object supply device and a raw material powder classifier, and compressed air. The method for producing lithium hydroxide powder using a system including a supply unit (S1000) includes a compressed air supply step (S100), a pulverization object supply step (S200), a pulverization object drying step (S300), and a pulverization step (S400). .

Here, the drying step (S300) of the pulverizing object includes a first magnetic material removal step (S310).

More specifically, the first magnetic material removal step (S310) is characterized in that the magnetic material contained in the pulverization object is removed after the pulverization object supply step (S200).

Here, the first magnetic material removal step (S310) is characterized in that it is performed at at least one selected location among the inlet and outlet of the drying device.

And, the step of pulverizing the object to be pulverized (S400) includes a step of removing the secondary magnetic material (S410).

More specifically, the secondary magnetic material removal step (S410) is characterized in that the magnetic material contained in the raw material powder is removed after the pulverizing object drying step (S300).

At this time, the secondary magnetic material removal step (S410) is characterized in that it is performed at at least one position selected from the rear end of the dry grinding object supply device and the rear end of the raw material powder classifier.

Accordingly, the method for producing lithium hydroxide powder (S1000) includes the first magnetic material removal step (S310) and the secondary magnetic material removal step (S410), thereby removing the magnetic material over a plurality of steps to remove the lithium hydroxide powder. It can provide the effect of effectively removing magnetic substances contained in lithium.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only for illustrating the invention, and those skilled in the art may make various modifications or equivalents from the detailed description of the invention. It will be appreciated that one embodiment is possible.

Therefore, the true scope of rights of the present invention must be determined by the technical spirit of the patent claims.

1000: Lithium hydroxide powder manufacturing system
100: Initial collection section of the crushing object
110: Grinding object transfer line
200: drying section
210: drying device
300: Dry grinding object collection unit
310: Dry grinding object transfer line
400: Grinding unit
410: Dry grinding object storage device
420: Dry grinding object supply device
430: Grinding device
440: Raw material powder dust collection device
450: Raw material powder classification device
500: Compressed air supply unit
510: Compressed air supply line
520: Compressed air auxiliary supply line
530: moisture drying device
540: Carbon dioxide removal device
600: Raw material powder packaging section
700: Magnetic substance removal unit
S1000: Lithium hydroxide powder manufacturing method
S100: Compressed air supply step
S200: Grinding object supply step
S300: Drying step of grinding object
S310: First magnetic material removal step
S400: Grinding object grinding step
S410: Secondary magnetic material removal step

Claims (10)

An initial collection unit 100 of the pulverized material including at least one selected from moisture and magnetic materials and provided to collect the pulverized material used as a raw material for a battery;
A drying unit 200 connected to the initial collection unit for the pulverizing objects and including a drying device 210 provided to heat and dry the pulverizing objects collected in the initial collection unit for the pulverizing objects;
A dry pulverized object collection unit 300 connected to the drying unit and provided to collect the dry pulverized object that has been dried in the drying unit;
A grinding unit 400 connected to the dry grinding object collection unit and including a grinding device 430 provided to grind the dry grinding objects collected in the dry grinding object collection unit to produce raw material powder; and
It is connected to at least one selected from the initial collection unit, drying unit, dry grinding object collection unit, and grinding unit so that the grinding object collected in the initial collection unit of the grinding object can be transferred to the drying unit and side to remove moisture and moisture. A lithium hydroxide powder production system comprising a compressed air supply unit 500 including a compressed air supply line 510 provided to supply compressed air from which at least one of carbon dioxide has been removed. According to claim 1,
The lithium hydroxide powder manufacturing system,
Manufacture of lithium hydroxide powder, comprising: a magnetic material removal unit 700 provided at at least one location selected from the drying unit and the pulverizing unit to collect and remove magnetic substances contained in the pulverizing object; system. According to claim 2,
The lithium hydroxide powder manufacturing system,
It further includes a raw material powder packaging unit 600 provided to vacuum pack the raw material powder transferred from the grinding unit,
The grinding unit 400,
A dry grinding object storage device 410 connected to the dry grinding object collection unit and provided to temporarily store the dry grinding object collected in the dry grinding object collection unit;
a dry grinding object supply device 420 provided to supply the dry grinding object stored in the dry grinding object storage device to the grinding device;
A raw material powder dust collector 440 provided to collect the raw material powder generated in the grinding device; and
A lithium hydroxide powder manufacturing system comprising a raw material powder classifier (450) provided to transfer the raw material powder collected in the raw material powder dust collector to the raw material powder packaging unit. According to claim 3,
The magnetic material removal unit 700,
It is provided at at least one location selected from the inlet and outlet of the drying device,
A lithium hydroxide powder manufacturing system, characterized in that it is provided at at least one position selected from the rear end of the dry grinding object supply device and the rear end of the raw material powder classification device. According to claim 1,
The drying device 210,
A drying unit 211 provided to rotate and stir the pulverized object inside the drying device to prevent the pulverized object from sticking inside the drying device when drying the pulverized object transferred into the drying device. Contains ;,
The drying unit 211 is
A drive shaft (211a) formed to extend a predetermined length inside the drying apparatus and driven to rotate up and down;
A first stirring blade (211b) coupled to the drive shaft and rotating with the drive shaft as a rotation axis; and
A second stirring blade (211c) coupled to the drive shaft, rotating with the drive shaft as a rotation axis, and having a diameter smaller than the diameter of the first stirring blade, wherein the spiral direction of the first stirring blade A lithium hydroxide powder manufacturing system, characterized in that the spiral directions of the second stirring blades are formed in opposite directions. According to claim 1,
The initial collection unit 100 for the pulverized object,
A crushing object transfer line 110 is connected to the drying device and is provided to transfer the shredding objects collected in the initial collection unit to the inlet of the drying device 210,
The compressed air supply unit 500,
It is formed to extend from the compressed air supply line and connected to the crushing object transfer line so as to transport the grinding object collected in the initial collection unit of the grinding object to the inlet side of the drying device, and supplies auxiliary air to the crushing object transfer line. A lithium hydroxide powder production system comprising a compressed air auxiliary supply line (520) provided to do so. According to claim 1,
The compressed air supply unit 500,
A moisture drying device 530 provided to remove moisture contained in the compressed air; and
A carbon dioxide removal device 540 provided to remove carbon dioxide contained in the compressed air; A lithium hydroxide powder production system comprising at least one selected from the group consisting of: Method for producing lithium hydroxide powder (S1000 ) in,
A compressed air supply step (S100) of supplying the compressed air formed in the compressed air supply unit to at least one selected from the initial collection unit, drying unit, and grinding unit of the pulverized object;
After the compressed air supply step, a pulverizing object supply step (S200) of supplying the pulverizing object collected in the pulverizing object initial collection unit to the drying unit;
After the step of supplying the pulverized object, a pulverizing object drying step (S300) of heating and drying the pulverizing object to remove moisture contained in the pulverizing object transferred to the drying unit to produce a pulverizing object from which moisture has been removed; and
A method for producing lithium hydroxide powder, comprising: after the step of drying the grinding object, grinding the dried object in the drying unit to produce raw material powder (S400). According to claim 8,
In the step of drying the grinding object (S300),
After the step of supplying the pulverizing object, a first magnetic material removal step (S310) of removing the magnetic material contained in the pulverizing object,
The grinding object grinding step (S400) is,
A method for producing lithium hydroxide powder, comprising: a secondary magnetic material removal step (S410) of removing magnetic materials contained in the raw material powder after the step of drying the pulverizing object. According to clause 9,
The first magnetic material removal step (S310),
It is performed at at least one location selected from the inlet and outlet of the drying device,
In the secondary magnetic material removal step (S410),
A method of producing lithium hydroxide powder, characterized in that it is carried out at at least one position selected from the rear end of the dry grinding object supply device and the rear end of the raw material powder classification device.