KR20240018971A - Hot-dip galvanizing dross removal systems - Google Patents

Abstract

A hot-dip galvanizing dross processing device according to an embodiment of the present invention includes a moving means installed and operating in the longitudinal direction of the plating tank, and moving along the longitudinal direction of the plating tank by the moving means to touch the surface of the plating tank (P). It includes a blower unit that blows the formed dross to one end, and a collection unit that removes the dross gathered at one end in the longitudinal direction of the plating tank.
In addition, the moving means includes a first rack installed along the longitudinal direction of the exterior of the plating tank, a first drive motor equipped with a first pinion that rotates in engagement with the first rack, and the first drive motor is mounted on the first rack. A transfer block moving along, an arm frame bent in the 'L' shape from the transfer block and disposed in the height direction of the plating bath, a body part surrounding the air inflow line formed along the arm frame, a second rack mounted on the body part, and It includes a second drive motor equipped with a second pinion that engages and rotates, and a cover part that surrounds and protects the outer body of the body and the second drive motor.
In addition, the blower unit is connected to one end of the air inlet line, but has a nozzle part that rises and falls along the body part, a heating part that heats the air before flowing into the nozzle part from the air inlet line, and a rotation angle of the nozzle part. Includes a rotating motor to control.

Description

Hot-dip galvanizing dross removal systems}

The present invention relates to a hot-dip galvanizing dross processing device. More specifically, in order to remove floating upper dross on a conventional plating tank, an operator collects the upper dross at the edge of the plating tank and then scoops the collected upper dross onto a storage plate. Unlike work that is transferred to an adjacent dross processing box, it is designed to quickly and effectively remove a large amount of dross, protect the worker's safety and body, and improve the removal efficiency of impurities such as the dross contained. It relates to a hot dip galvanizing dross processing device.

There are many reasons to treat metal surfaces, but the biggest reason is to prevent corrosion of steel. Zinc Plating (Galvanization) has also been developed for the same purpose.

When galvanizing occurs in an environment where rust may occur, zinc oxidizes instead of iron. It primarily prevents corrosion of iron, thereby increasing durability and longevity.

When zinc oxidizes, unlike general iron rusting, it appears as a white powder and is only visible as a white stain. Therefore, it is widely used because it looks good aesthetically.

Additionally, the reason why stainless steel, which does not corrode, is not used is because it retains the strength of steel, which is an advantage of iron, and is inexpensive.

In other words, galvanizing is a method that maximizes the advantages of iron and prevents corrosion, which is a disadvantage. Galvanizing is cheaper than stainless steel, so it is widely used.

In addition, hot dip galvanized (Iron, HDGI, CGI, GI) is commonly called hot dip galvanized galvanizing (GI). Hot dip galvanizing involves heating zinc to a high temperature, adding the product to be plated into the molten metal, removing it, and then cooling it.

In hot dipped galvanized (Iron), oxides such as Fe ₂ O ₅ are generated by iron and aluminum during the zinc plating process, which is called top dross, floating dross, floating dross or It is called upper dross, etc.

Floating dross (Fe ₂ Al ₅ ) attaches to the plating bath equipment, causing defects, and attaches to the plating layer or plating surface, causing dross defects.

Since this floating dross causes defects in the plating layer, a device and method to effectively remove it is needed.

Conventionally, in order to remove floating upper dross on the surface of a plating bath, a shovel has been used, as shown in FIG. 1.

In other words, the worker collected the upper dross that was lighter than the specific gravity of the molten zinc and floated on the surface of the plating bath to the edge of the plating bath, then lifted the collected upper dross onto a storage plate and transferred it to an adjacent dross processing box. .

Therefore, when removing the upper dross using a conventional dross removal shovel, it was difficult to quickly and effectively remove a large amount of dross, and not only was it very difficult to completely remove it, but it also affected the safety of the worker. There were limits to protecting the body.

Korean Patent Registration No. 10-1001871, invention title “Plating Jig” (registration date 2010.12.10.)

The present invention was created to solve the above-mentioned problems and needs. In order to remove the floating upper dross on a conventional plating tank, the worker collects it at the edge of the plating tank, then scoops the collected upper dross onto a storage plate and places it on the adjacent dross. (dross) Unlike work that is transferred to a processing box, hot-dip galvanized dross can quickly and effectively remove a large amount of dross, protect the worker's safety and body, and improve the removal efficiency of impurities such as dross contained in it. The purpose is to provide a processing device.

In order to achieve the above object, a hot-dip galvanizing dross processing device according to an embodiment of the present invention includes a moving means installed and operating in the longitudinal direction of the plating tank, while moving along the longitudinal direction of the plating tank by the moving means. It includes a blower unit that blows the dross formed on the surface of the plating tank (P) to one end, and a collection unit that removes the dross gathered at one end in the longitudinal direction of the plating tank.

In addition, the moving means includes a first rack installed along the longitudinal direction of the exterior of the plating tank, a first drive motor equipped with a first pinion that rotates in engagement with the first rack, and the first drive motor is mounted on the first rack. A transfer block moving along, an arm frame bent in the 'L' shape from the transfer block and disposed in the height direction of the plating bath, a body part surrounding the air inflow line formed along the arm frame, a second rack mounted on the body part, and It includes a second drive motor equipped with a second pinion that engages and rotates, and a cover part that surrounds and protects the outer body of the body and the second drive motor.

In addition, the blower unit is connected to one end of the air inlet line, but has a nozzle part that rises and falls along the body part, a heating part that heats the air before flowing into the nozzle part from the air inlet line, and a rotation angle of the nozzle part. Includes a rotating motor to control.

According to the present invention, there is an advantage in that impurities are treated by blowing out the dross formed on the surface of the plating tank to one end while moving along the longitudinal direction of the plating tank through the blower unit.

In addition, when the blower unit moves along the longitudinal direction of the plating bath, there is an advantage in that the angle can be varied in the horizontal direction, such as by directing the nozzle portion in the diagonal direction of the plating bath.

In addition, there is an advantage in that a pair of blower units are formed to correspond in the width direction of the plating bath, so that the discharge air intersects, making impurity removal more efficient.

1 is a perspective view illustrating an example of removing impurities such as conventional dross.
Figure 2 is a perspective view illustrating a hot-dip galvanizing dross processing device according to an embodiment of the present invention.
Figure 3 is a cross-sectional view illustrating a portion of a hot-dip galvanizing dross processing device according to an embodiment of the present invention.
Figure 4 is a perspective view illustrating another part of a hot-dip galvanizing dross processing device according to an embodiment of the present invention.
Figure 5 is a schematic cross-sectional view illustrating another part of a hot-dip galvanizing dross processing device according to an embodiment of the present invention.
Figure 6 is a schematic perspective view illustrating a collection unit according to an embodiment of the present invention.
Figure 7 is a schematic perspective view illustrating a collection unit according to another embodiment of the present invention.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be.

On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

As used herein, “comprises.” Or “to have.” Terms such as are intended to designate the presence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification, but are intended to indicate the presence of one or more other features, numbers, steps, operations, components, parts, or It should be understood that the existence or addition possibility of combinations of these is not excluded in advance.

Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

Additionally, terms such as “…unit” used in the specification refer to a unit that processes at least one function or operation, and may be implemented as hardware, software, or a combination of hardware and software.

In addition, the components of the embodiments described with reference to each drawing are not limited to the corresponding embodiments, and may be implemented to be included in other embodiments within the scope of maintaining the technical spirit of the present invention, and may also be included in separate embodiments. Even if the description is omitted, it is natural that a plurality of embodiments may be re-implemented as a single integrated embodiment.

In addition, when describing with reference to the accompanying drawings, identical or related reference numerals will be given to identical or related elements regardless of the reference numerals, and overlapping descriptions thereof will be omitted.

In describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

In the present invention, in order to remove floating upper dross on a conventional plating tank, a worker collects it at the edge of the plating tank, scoops up the collected upper dross onto a storage plate, and transfers it to an adjacent dross processing box, which is very dangerous. We propose a hot-dip galvanized dross processing device that solves the problem of being unstable and difficult to effectively remove large amounts of dross, and can efficiently process the same impurities in dross quickly and stably as follows.

Figure 2 is a perspective view illustrating a hot-dip galvanizing dross processing device according to an embodiment of the present invention, and Figure 3 is an exemplary illustration of a portion of a hot-dip galvanizing dross processing device according to an embodiment of the present invention. It is a cross-sectional view shown in , and Figure 4 is a perspective view illustrating another part of the hot-dip galvanizing dross processing device according to an embodiment of the present invention.

In addition, Figure 5 is a schematic cross-sectional view exemplarily showing another part of a hot-dip galvanized dross processing apparatus according to an embodiment of the present invention, and Figure 6 is an exemplary schematic diagram of a collection unit according to an embodiment of the present invention. It is a schematic perspective view shown as , and Figure 7 is a schematic perspective view illustrating a collection unit according to another embodiment of the present invention.

Referring to the above drawings, the hot-dip galvanizing dross processing apparatus 100 according to an embodiment of the present invention includes moving means 110 and 120 installed and operating in the longitudinal direction of the plating tank P, the moving means A blower unit 130 that blows the dross (D) formed on the surface of the plating tank (P) to one end while moving along the longitudinal direction of the plating tank (P) by (110, 120), and the plating tank It includes a collection unit 150 that removes the dross (D) gathered at one end in the longitudinal direction of (P).

In addition, the moving means 110 and 120 include a first rack 111 installed along the longitudinal direction of the exterior of the plating tank, and a first drive equipped with a first pinion 112 that rotates in engagement with the first rack 111. A motor 113, a transfer block 115 on which the first drive motor 113 is seated and moves along the first rack, and the transfer block 115 is bent into an 'ㄱ' shape in the height direction of the plating bath (P). The arm frame 121 is arranged, the body portion 123 surrounding the air inlet line 122 formed along the arm frame 121, and the second rack 126 mounted on the body portion 123 engages and rotates. It includes a second drive motor 128 equipped with a second pinion 127, and a cover part 129 that surrounds and protects the body part 123 and the second drive motor 128.

In addition, the blower unit 130 is connected to one end of the air inlet line 122 and has a nozzle part 131 that is raised and lowered along the body part 123, and the nozzle part (131) in the air inlet line 122. It includes a heating unit 133 that heats the air before it flows into the nozzle unit 131, and a rotation motor 135 that adjusts the rotation angle of the nozzle unit 131.

In addition, the cover portion 129 is characterized by being coated with a heat-resistant paint containing modified alkyd as its main component.

In addition, the heating unit 133 is characterized in that it supplies the air at a temperature of 500 to 600°C at a pressure of 5 to 6 bar.

In addition, the blower unit 130 is characterized in that the nozzle unit 131 faces the diagonal direction of the plating tank (P) when moving along the longitudinal direction of the plating tank (P).

In addition, the air inlet line 122 includes a flexible metal flexible pipe, and the air inlet line 122 is supplied to the plating tank P in the height direction of the plating tank P through the water level sensor 137 installed on one side of the arm frame 121. The nozzle unit 131 moves up and down as the body part 123 goes up and down.

In addition, the bluer unit 130 is characterized in that a pair is formed to correspond to the width direction of the plating bath (P).

In addition, the collection unit 150 includes a basket portion 151 with a recessed net-shaped interior, a basket roller 153 that rotates the basket portion 151, and a basket roller 153 that provides rotational power to the basket roller 153. It may include a basket motor 155, and a temporary collection unit 157 in which a storage space with an open top is formed on one side of the basket roller 153.

In addition, the collection unit 150 includes a plurality of skimmer plates 151' having a radial gradient in a net shape, a skimmer roller 153' rotating both ends of the skimmer plate 151', and the skimmer roller 153. It may include a skimmer motor 155' that provides rotational power to the skimmer roller 153' and a temporary collection unit 157' having a storage space with an open top on one side of the skimmer roller 153'.

Now, the configuration and operation of the hot-dip galvanizing dross processing apparatus 100 according to an embodiment of the present invention will be described in detail as follows.

The hot-dip galvanizing dross processing device 100 proposed by the present invention is a device for removing or processing impurities such as impure zinc suspended in the plating bath (P) of a hot-dip galvanizing facility, and is provided by moving means 110 and 120. , it may include a blue war unit 130, and a collection unit 150.

The moving means 110 and 120 can be largely divided into a first moving means 110 operating along the longitudinal direction of the plating tank P and a second moving means 120 operating along the height direction within the plating tank P. there is.

FIG. 3 is a cross-sectional view illustrating a portion viewed from the A-A' direction of FIG. 2.

As shown in FIG. 3, etc., the first moving means 110 includes a first rack 111 installed along the outer longitudinal direction of the plating tank P, and a first pinion 112 rotating in engagement with the first rack 111. ), and a transfer block 115 on which the first drive motor 113 is seated and moves along the first rack.

More specifically, as shown in FIGS. 2 and 3, the first moving means 110 is installed along the longitudinal direction on both left and right sides of the plating tank P, and is located on the upper part of a support frame (not indicated) having a predetermined height. A first rail (not marked) is installed, a first rack 111 of a predetermined length is formed adjacent to the first rail in the same direction, and a transfer block ( 115) is fixedly installed in the horizontal direction.

In addition, a first drive motor 113 equipped with a first pinion 112 is installed on one side of the transfer block 115.

Therefore, when the first drive motor 113 mounted on the upper side of the transfer block 115 provides rotational power, the first pinion 112 rotates and moves along the first rack 111, and the transfer block 115 ) is a member that allows the finally connected bluer unit 130 to move smoothly along the longitudinal direction of the plating tank (P).

In addition, the first moving means 110 has a cableveyor installed adjacent to the first rack 111, which is flexible so that it can be connected to the air inlet line 122, which will be described later, inside the cableveyor. Provide space.

As shown in FIGS. 4 and 5, the second moving means 120 includes an arm frame 121 bent in an 'L' shape at the transfer block 115 and disposed in the height direction of the plating tank P, the arm frame A second drive equipped with a body portion 123 surrounding the air inlet line 122 formed along (121) and a second pinion 127 rotating in engagement with the second rack 126 mounted on the body portion 123. It may include a motor 128, and a cover 129 that surrounds and protects the body 123 and the second drive motor 128.

The arm frame 121 extends from the transfer block 115, is bent downward into an 'L' shape, and is disposed in the height direction of the plating tank P. As shown in Figure 2, it is formed vertically in the 'Z' axis direction. It can be positioned horizontally in an 'ㄴ' shape by rotating counterclockwise with the 'Y' axis as the central axis.

This is to prevent or reduce damage to equipment due to scattering of the plating solution when lowering the plated material into the plating tank (P).

As shown in FIG. 5, the body portion 123 is spaced apart from the arm frame 121, and its outermost portion is inserted into the cover portion 129, and the air inlet line 122 is formed along the arm frame 121. ) by wrapping and protecting it, it can have a hollow square frame shape.

For reference, the air inlet line 122 includes a flexible metal flexible pipe, allowing the blower unit 130, which will be described later, to smoothly rise and fall in the height direction within the plating tank (P).

Additionally, the body portion 123 is coupled to the second rack 126 in parallel on one outer surface.

Accordingly, the body portion 123 can naturally go up and down as the second rack 126 moves up and down.

The second drive motor 128 includes a second pinion 127 that rotates in engagement with the second rack 126 and provides rotational power to move the second rack 126 as the second pinion 127 rotates. Move it up and down.

The cover part 129 is a protective member that surrounds and protects the outside of the body part 123 and the second drive motor 128. It is coated with a heat-resistant paint containing modified alkyd as the main ingredient, so it has heat resistance up to at least 200°C and is installed inside. Allows you to protect your equipment.

Figure 5 is a cross-sectional view illustrating a portion viewed from the 'F' direction in Figure 4.

As shown in FIG. 5, etc., the blower unit 130 moves along the longitudinal direction of the plating tank (P) by the moving means (110, 120) and moves the dross (D) formed on the surface of the plating tank (P). It is a device that blows at one end.

The blower unit 130 is connected to one end of the air inlet line 122, and has a nozzle part 131 that goes up and down along the body part 123, and air before flowing into the nozzle part 131 from the air inlet line 122. It may include a heating unit 133 for heating, and a rotation motor 135 for adjusting the rotation angle of the nozzle unit 131.

In particular, the nozzle unit 131 has a trapezoidal shape with upper and lower beams, and functions to blow dross floating on the upper surface of the plating tank P in one direction, and maintains an angle of about 45° in the horizontal direction to maintain the plating tank (P). P) is moved along the longitudinal direction of one side of the plating tank (P) while facing diagonally.

The heating unit 133 supplies air at a temperature of 500 to 600°C at a pressure of 5 to 6 bar, and supplies air to the nozzle unit 131 in a high temperature and high pressure state before flowing into the nozzle unit 131 from the air inlet line 122. supplies air to

For reference, the heating unit 133 stably generates a high temperature of up to 700°C even at a high air pressure of 5 bar or more, and maintains appropriate durability even in high temperature hot air of 600°C.

The rotation motor 135 is a power device that adjusts the rotation angle of the nozzle unit 131, allowing it to be freely varied between 10 and 60° in the horizontal direction, so that air is directed toward impurities concentrated on the edge of the plating tank (P). Allows to discharge.

In addition, the water level sensor 137 is installed on one side of the arm frame 121 so that the height can be adjusted so that the nozzle part 131 can be raised and lowered as the body part 123 rises and falls in the height direction of the plating tank (P). do.

Meanwhile, as shown in FIG. 2, the blue unit 130 may be formed in a pair corresponding to the width direction of the plating bath (P).

Therefore, as the blower unit 130 proceeds while blowing out impurities such as dross (D) along the longitudinal direction of one side of the plating tank (P), it sequentially blows out impurities along the longitudinal direction of the other side of the plating tank (P). As the process progresses, the discharged air intersects, making impurity treatment more effective.

As shown in FIGS. 6 and 7, the collection unit 150 is a device that removes the dross D collected at one end of the plating tank P in the longitudinal direction.

Referring to FIG. 6, the collection unit 150 according to an embodiment of the present invention includes a net-shaped basket 151 with a recessed interior, and a basket roller 153 that rotates the basket 151. , a basket motor 155 that provides rotational power to the basket roller 153, and a temporary collection unit 157 in which a storage space with an open top is formed on one side of the basket roller 153.

Here, the basket portion 151 is a member that filters and collects the dross (D) while passing the plating solution, and is formed with a depression inside that can collect the dross (D) like a basket shape, thereby filtering out the dross (D) well. It can be captured.

The basket roller 153 is a cylindrical roller that holds and rotates one side of the basket portion 151, and rotates once to settle on the temporary collection portion 157.

The basket motor 155 is an electric motor that provides rotational power to the basket roller 153, and must be equipped with a deceleration device to greatly reduce the rotation speed to ensure stability.

The temporary collection unit 157 is a collection member with a storage space with an open top, and has wheels attached to the bottom to add mobility, and its shape can be applied in various ways.

Referring to FIG. 7, the collection unit 150 according to another embodiment of the present invention includes a plurality of radially inclined skimmer plates 151' in a net shape, and skimmer rollers that rotate both ends of the skimmer plates 151'. (153'), a skimmer motor (155') that provides rotational power to the skimmer roller (153'), and a temporary collection unit (157') having a storage space with an open top on one side of the skimmer roller (153'). It can be included.

Here, the skimmer plate 151' is a member that filters and collects the dross D while passing the plating solution. A plurality of net-shaped plates are radially inclined and fixed to both ends of the skimmer roller 153'. As it rotates, dross (D) can be well filtered and collected.

The skimmer roller 153' is a cylindrical roller that holds and rotates both sides of the skimmer plate 151', and falls on the temporary collection unit 157' through continuous rotation.

The skimmer motor 155' is an electric motor that provides rotational power to the skimmer roller 153', and is equipped with a deceleration device to lower the rotation speed and operate it at a constant speed.

The temporary collection unit 157' is a collection member with a storage space with an open top, and has wheels attached to the bottom to add mobility, and its shape can be applied in various ways.

As such, the hot dip galvanizing dross processing apparatus 100 according to embodiments of the present invention can be expected to have the following effects.

According to the present invention, there is an advantage in that impurities are treated by blowing out the dross (D) formed on the surface of the plating bath (P) to one end while moving along the longitudinal direction of the plating bath (P) through the blower unit (130). .

In addition, when the blower unit 130 moves along the longitudinal direction of the plating bath, there is an advantage in that the angle can be varied in the horizontal direction, such as by directing the nozzle portion in the diagonal direction of the plating bath.

In addition, there is an advantage that the blower units 130 are formed in pairs corresponding to each other in the width direction of the plating tank, so that the discharge air intersects, making impurity removal more efficient.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications, changes, and substitutions can be made by those skilled in the art without departing from the essential characteristics of the present invention. will be.

Accordingly, the embodiments disclosed in the present invention and the attached drawings are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments and the attached drawings. .

The scope of protection of the present invention should be interpreted in accordance with the claims described below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of the present invention.

100: Dross processing device proposed by the present invention
110: first means of transportation
111: first rack
112: 1st pinion
113: first driving motor
115: transfer block
120: second means of transportation
121: Arm frame
122: Air inflow line
123: body part
126: 2nd rack
127: 2nd pinion
128: second driving motor
129: cover part
130: Blue War Unit
131: nozzle part
133: Heating unit
135: rotation motor
137: water level sensor
150: Collection unit
151: Basket part
153: Basket roller
155: Basket motor
157: Temporary collection

Claims (8)

A moving means installed and operating in the longitudinal direction of the plating tank;
a blower unit that blows dross formed on the surface of the plating bath (P) to one end while moving along the longitudinal direction of the plating bath by the moving means; and
It includes a collection unit for removing the dross collected at one end of the plating tank in the longitudinal direction,
The means of transportation is,
A first rack installed along the longitudinal direction of the exterior of the plating tank;
a first drive motor equipped with a first pinion that rotates in engagement with the first rack;
a transfer block on which the first drive motor is mounted and moves along the first rack;
An arm frame bent in an 'L' shape at the transfer block and disposed in the height direction of the plating tank;
a body portion surrounding an air inlet line formed along the arm frame;
a second drive motor equipped with a second pinion that rotates in engagement with a second rack mounted on the body; and
It includes a cover portion that surrounds and protects the body portion and the second drive motor,
The blue war unit is,
A nozzle portion connected to one end of the air inlet line and moving up and down along the body portion;
a heating unit that heats air before it flows from the air inlet line to the nozzle unit; and
A hot-dip galvanizing dross processing device comprising a rotation motor that adjusts the rotation angle of the nozzle unit. According to claim 1,
A hot-dip galvanized dross treatment device, characterized in that the cover part is coated with a heat-resistant paint containing modified alkyd as a main ingredient. According to claim 1,
The heating unit supplies the air at a temperature of 500 to 600°C at a pressure of 5 to 6 bar. According to claim 1,
The blower unit is a hot-dip galvanizing dross processing device, characterized in that the nozzle portion faces the diagonal direction of the plating tank when moving along the longitudinal direction of the plating tank (P). According to claim 1,
The air inlet line includes a flexible metal pipe,
A hot-dip galvanizing dross processing device, wherein the nozzle portion is raised and lowered as the body portion is raised and lowered in the height direction of the plating tank through a water level sensor installed on one side of the arm frame. According to claim 1,
The blower unit is a hot-dip galvanizing dross processing device, characterized in that a pair is formed to correspond in the width direction of the plating bath. According to claim 1,
The collection unit is
A basket portion with a recessed net-shaped interior;
A basket roller that rotates the basket unit;
A basket motor that provides rotational power to the basket roller; and
A hot-dip galvanized dross processing device comprising a temporary collection unit having a storage space with an open top on one side of the basket roller. According to claim 1,
The collection unit is
A plurality of radially gradient skimmer plates in a net shape;
Skimmer rollers rotating both ends of the skimmer plate;
A skimmer motor that provides rotational power to the skimmer roller; and
A hot-dip galvanized dross processing device comprising a temporary collection unit having a storage space with an open top on one side of the skimmer roller.