KR20200036556A - Transport apparatus and method - Google Patents

Abstract

The present invention provides a transport apparatus and a transport method. The transport apparatus comprises: a vessel unit formed to accommodate melt, and provided with a protrusion unit on a side thereof; a transport unit formed to move from first processing equipment to second processing equipment, and provided with a hook unit to support the protrusion unit; a gas supply unit mounted on the vessel unit and the transport unit, and provided with a plurality of parts that can be connected to each other; and a nozzle unit formed to inject gas into an internal space of the vessel unit, and connected to the gas supply unit. The plurality of parts each include couplings on the protrusion unit and the hook unit, and are connected to each other through the couplings. The transport method applied to the transport apparatus homogenizes the composition and temperature of melt while transporting the melt from the first processing equipment to the second processing equipment.

Description

TRANSPORT APPARATUS AND METHOD {TRANSPORT APPARATUS AND METHOD}

The present invention relates to a transfer apparatus and method, and more particularly, to a transfer apparatus and method capable of homogenizing the composition and temperature of the melt during transportation of the melt from the first treatment facility to the second treatment facility.

Generally, the steelmaking process proceeds in the order of pretreatment, converter refining, secondary refining and continuous casting. Among them, in the second refining, a rice (BAP, bubbling aluminum powder) process, a ladle furnace (LF) process, and a RH (Rheinstahl Heraus) process are selectively performed. In the second refining process, molten steel is placed in a ladle and transported to each process by a ceiling crane.

For example, molten steel is transported from the converter refining process to the rice process, and the components and temperature are homogenized in the rice process. Thereafter, the molten steel is directly transported to the continuous casting process, or is transported to the continuous casting process through at least one process of the LF process and the RH process. At this time, the molten steel is finely adjusted in the component content in the LF process, and impurities are floated and separated. In addition, the gas component of the molten steel is removed in the RH process, and the component content is finely adjusted. However, if the treatment of molten steel is not normally performed in the above-described rice process, LF process or RH process, the molten steel temperature is excessively high, or component separation occurs in the molten steel.

If the temperature of the molten steel is excessively high, a large amount of coolant must be added to the ladle containing molten steel to cool the molten steel to an appropriate temperature. Accordingly, there is a problem in that the entire process is delayed and costs increase. In addition, if separation of components occurs in the molten steel, the next process cannot be performed and the process is repeated. Thus, there is a problem that the productivity of the entire process is lowered due to stagnant logistics of molten steel.

The technology underlying the present invention is published in the following patent documents.

KR 10-2016-0073017 A KR 10-2017-0106073 A

The present invention provides a transfer device and method capable of homogenizing the composition and temperature of a melt while transporting the melt.

The present invention provides a transport apparatus and method capable of injecting gas into a melt according to a gas injection condition determined for each transport path, steel type, and component content of the melt.

The conveying apparatus according to the embodiment of the present invention is formed to accommodate the melt, the container portion having a projection on the side; A transfer unit formed to move from the first processing facility to the second processing facility, and having a hook portion to support the protrusion; A gas supply unit having a plurality of parts mounted on the container unit and the transfer unit, and which can be interconnected; And a nozzle unit formed to inject gas into the interior space of the container unit and connected to the gas supply unit, wherein the plurality of parts respectively have couplings on the projection and the hook, and the couple They are interconnected through rings.

The first coupling among the couplings may be provided on the inner surface of the hook portion, and the second coupling may be provided on the lower surface of the projection portion.

The couplings are coupled to each other by contact of the protrusion and the hook, and can be released by separation.

The transfer unit, the vehicle body formed to be able to run along the rail; It is installed on the vehicle body, and further includes a driver for elevating the hook portion, and a first part of the plurality of parts is supported by the vehicle body and may extend toward the hook portion.

The first part includes a storage container supported by the vehicle body and filled with gas therein; A first cable that connects the storage container and the first coupling, is adjustable in length, and is provided with a gas flow path therein; And a flow controller mounted on the first cable.

The second part of the plurality of parts may be installed in the container part and connected to the nozzle part.

The second part may further include a second cable connecting the second coupling and the nozzle unit.

The gas supply unit may include a first flow rate detector connected to the first coupling; A second flow rate detector connected to the second coupling; It may further include a preset gas injection condition, a flow rate regulator for controlling the operation of the flow rate controller by utilizing the detection value of the first flow rate detector and the detection value of the second flow rate detector.

It may further include a control unit for controlling the operation of the gas supply unit by using a preset gas injection condition for each transport path, steel type, and component content of the melt.

The transfer method according to the embodiment of the present invention includes a process of transporting the melt treated in the first treatment step to the second treatment step; It includes a process of injecting gas into the melt while transporting the melt, utilizing a preset gas injection condition for each transport path, steel type, and component content of the melt.

The first treatment process is a process selected from a rice process, an L-F process, and an RH process, and the second process is a process selected from an L-F process, an RH process and a continuous casting process, and the first process It may be a different process from the process.

The transporting process includes: preparing a container containing a melt processed in the first processing process; Inserting a projection of the container into a hook portion of a transfer device capable of moving from one location where the first processing step is performed to another location where the second processing step is performed; It includes; the process of driving the transfer device from the one position to the other position; and, when injecting gas into the melt, it can supply gas to the container side by contact of the hook portion and the projection portion.

The contact portion of the hook portion and the projection portion can be sealed from outside air by using the weight of the container.

The process of injecting gas may include determining the injection flow rate and injection time of the gas by utilizing the gas injection conditions; In accordance with the injection flow rate and injection time, the process of injecting the gas under the melt and bubbling the melt; may include.

The process of injecting gas may be selectively performed according to a result of a comparison between a preset temperature and a temperature of the melt.

According to the embodiment of the present invention, while transporting the melt from the first treatment facility to the second treatment facility by using a crane and a container, gas can be injected into the melt to homogenize the composition and temperature of the melt. At this time, gas may be injected into the melt according to the gas injection conditions determined for each transport path, steel type, and component content of the melt.

Further, according to the embodiment of the present invention, gas can be supplied from the crane side to the container side through the contact portion between the crane and the container. At this time, the couplings provided on the contact portion of the crane and the container can be hermetically sealed using the weight of the container.

1 is a block diagram of a transfer device and a processing facility according to an embodiment of the present invention.
2 is a view showing a bubbling condition according to an embodiment of the present invention.
3 is a schematic diagram of a transport apparatus according to an embodiment of the present invention
4 is a partially enlarged view of a transfer unit according to an embodiment of the present invention.
5 is an enlarged view of a container portion according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and will be implemented in various different forms. Only the embodiments of the present invention are provided to make the disclosure of the present invention complete, and to fully inform the scope of the invention to those skilled in the art. The drawings may be exaggerated to describe embodiments of the present invention, and the same reference numerals in the drawings refer to the same elements.

The conveying apparatus and method according to the embodiment of the present invention can homogenize the composition and temperature of the melt while transporting the melt from the first treatment facility to the second treatment facility using a crane and a container. Hereinafter, embodiments of the present invention will be described in detail based on the secondary refining process of the steel mill. Of course, the conveying apparatus and method according to the embodiment of the present invention can be utilized for conveying of various processed materials in various processes.

1 is a block diagram of a transport apparatus and a processing facility according to an embodiment of the present invention, and FIG. 2 is a view showing bubbling conditions according to an embodiment of the present invention. In addition, Figure 3 is a schematic diagram of a transport apparatus according to an embodiment of the present invention, Figure 4 is a partially enlarged view of a transport unit according to an embodiment of the present invention. In addition, Figure 5 is an enlarged view of a container portion according to an embodiment of the present invention. At this time, Figure 4 (a) is a schematic view of the first coupling, Figure 4 (b) is a cross-sectional view of the hook.

1 to 5, a transfer device according to an embodiment of the present invention will be described.

The conveying device according to the embodiment of the present invention is formed to accommodate the melt (M), the container portion 220 having a protrusion 222 on the side, the second treatment facility in the first treatment facility 100 It is formed so as to be moved to 300, and is mounted on the transfer section 210, the container section 220 and the transfer section 210, each having a hook section 218 to support the projections 222, and can be interconnected. It includes a gas supply unit 230 having a plurality of parts, and is formed to inject gas (g) into the interior space of the container unit 220, and includes a nozzle unit 240 connected to the gas supply unit 230 . At this time, the plurality of parts are provided with couplings 236 and 237 on the contact portion of the protrusion 222 and the hook portion 218, respectively, and the plurality of parts are interconnected through the couplings 236 and 237. .

The melt (M) may include molten steel, and more specifically, may include molten steel produced in a rice process, an LF process, or an RH process. Of course, the melt M is not particularly limited to the above. That is, the melt (M) may be various other than molten steel. For example, the melt M may be molten iron or other various liquid materials.

The rice process is, for example, a step of placing the lance on the upper side of the molten steel and blowing the gas into the molten steel using the lance to bubble the molten steel. Equipment for performing the rice process is called a rice process equipment.

In the LF process, for example, an electrode is placed on the upper side of the molten steel, an arc is generated using the electrode, and gas is injected into the lower portion of the molten steel to separate impurities such as non-metallic inclusions from the molten steel, and components of alloying elements in the molten steel. This is a process for fine-tuning the content and uniformly raising the temperature of molten steel. Equipment that performs the LF process is called an LF process facility.

The RH process is a process of refluxing molten steel into a vacuum tank, removing impurity gas in molten steel, and finely adjusting the component content of the alloy element. The next step of the RH process is a continuous casting process. The facilities that perform the RH process are called RH process facilities.

The molten steel is transported from the converter refining process to the rice process, and the components and temperature are homogenized in the rice process. Thereafter, the molten steel is directly transported to the continuous casting process, or it is transported to the continuous casting process through at least one process of the LF process and RH process.

However, if the treatment of the molten steel is not normally performed in the rice process, the LF process or the RH process, the molten steel temperature is excessively high, or the component separation occurs in the molten steel.

If the temperature of the molten steel after the rice process, the LF process or the RH process is excessively high, the temperature of the molten steel must be lowered by adding a coolant to the molten steel before transferring the molten steel to the next process.

In an embodiment of the present invention, while the transport apparatus 200 transports molten steel, a gas such as argon gas may be injected into the molten steel to perform bubbling treatment. Accordingly, the molten steel adjusted to an appropriate temperature by bubbling treatment can be transported to the next process without congestion of the molten steel. Therefore, it is possible to reduce the use of the coolant or not to use the coolant.

In addition, if the stirring of molten steel is insufficient during the rice process, the LF process, or the RH process, the ferroalloy in the molten steel does not dissolve properly, and the deoxidizing agent and fluxing agent in the molten steel cannot sufficiently contact the molten steel. At this time, the content of elemental elements in various molten steels, such as the sulfur component or aluminum component in the molten steel may be excessively high.

In an embodiment of the present invention, while the transport apparatus 200 transports molten steel, gas may be bubbled by injecting gas into the molten steel, and the molten steel may be homogenized. Thus, without the stagnation of the distribution of molten steel, all of the ferroalloy can be dissolved, and a sufficiently stirred molten steel can be transported to the next process so that the deoxidizing agent and the fluxing agent can sufficiently contact the molten steel. Therefore, it is possible to smoothly control the component content of molten steel in the next process, and the process efficiency and quality of the next process can be improved.

The first treatment facility 100 may be a process facility selected from a rice process facility, an LF process facility, and a RH process facility. The second treatment facility 200 is a process facility selected from LF process facilities, RH process facilities, and continuous casting process facilities, and may be a process facility different from the first treatment facility 100.

For example, if the first treatment facility (also referred to as a 'day treatment facility') is a rice processing facility, the second treatment facility (also referred to as a 'other treatment facility') may be an LF processing facility, a RH processing facility, or a continuous casting process facility. have.

As such, the first treatment facility and the second treatment facility do not overlap with each other, and are the treatment facilities preceded by the first treatment facility in the Yongkang logistics industry, and the treatment facilities followed by the second treatment facility. Meanwhile, when there is no need to specifically distinguish between the first treatment facility 100 and the second treatment facility 300 in the following, it is collectively referred to as a treatment facility.

The transfer unit 210 is formed to move from the first processing facility 100 to the second processing facility 300. The transfer unit 210 may also be referred to as a crane or overhead crane.

The transfer unit 210 may include a vehicle body 211, a wheel 212, a rail 213, a driver 214, a rope 215, a rope pulley 216, an elevator 217, and a hook unit 218. have.

The vehicle body 211 is a body of the transfer unit 210 and does not specifically limit its size and shape. The vehicle body 211 is installed at a predetermined height from the ground or the floor of a processing facility, and can travel along the rail 212. The vehicle body 211 may be provided with a wheel 213 at the bottom. Of course, the installation position of the wheel 213 may vary, including, for example, side surfaces of the vehicle body 211. The driver 214 may be mounted on the vehicle body 211. A rope pulley 216, an elevator 217, and a hook portion 218 may be disposed under the vehicle body 211. Here, the rope 215 may be supported by the driver 214. The lift 217 may be supported on the rope 215 through the rope pulley 216. And the hook portion 218 may be installed on the elevator 217.

The rail 213 may be installed to connect a workplace in which the first treatment facility 100 is installed and a workplace in which the second treatment facility 300 is installed. The rails 213 are spaced a predetermined height above these workshops. A wheel 213 is installed on the rail 213 so as to be movable. The vehicle body 211 may travel along the rail 213 by the wheel 213. Two rails 213 may be installed in a pair. Of course, the rail 213 may be installed in a pair of one or more rails.

The driver 214 may be installed on the vehicle body 211. In detail, the driver 214 may be mounted on the upper surface of the vehicle body 211. Of course, the mounting position of the driver 214 may be various other than this. For example, the driver 214 may be installed inside the vehicle body 211. The driver 214 serves to elevate the hook portion 218. The driver 214 may include, for example, a hoist. The driver 214 may include a drum on which the rope 215 is supported on the outer circumferential surface, a motor (not shown) generating rotational force, and a gear box (not shown) connecting the drum and the motor. Of course, the configuration of the driver 214 may vary.

The driver 214 is a rope 215, for example, by winding or releasing a wire rope on the outer circumferential surface of the drum, the height of the rope pulley 216, the elevator 217, and the hook portion 218 supported by the rope 215 Can be adjusted.

For example, when the driver 214 releases the rope 215, the rope pulley 216 descends, and the elevator 217 supported by the rope pulley 216, such as a girder, may also descend. When the driver 214 winds up the rope 215, the rope pulley 216 rises, and the lift 217 supported by the rope pulley 216 may also rise.

The rope 215 may be raised or lowered by the driver 214 or lifted from the driver 214 to lift the elevator 217 supported by the rope 215. The rope 215 may have various types in addition to the wire rope within a range capable of performing such a role.

The elevator 217 may extend in the width direction of the container unit 220, and a rope pulley 216 may be installed at the center of the upper surface. Of course, the installation position of the rope pulley 216 may vary. The hook portion 218 may be mounted on the elevator 217. The hook portions 218 may be mounted on both sides of the lower surface of the elevator 217 in the vertical direction. The hook portion 218 may be referred to as a sovereign hook.

The hook portion 218 may include a vertical member and a hook member. That is, a vertical member is mounted on the elevator 217, and a hook member may be mounted on the lower end of the vertical member. The vertical member and the hook member may be integral or may be provided as a separate type to be mutually coupled.

The hook member may have a ring shape in which one part is bent upward and one side is opened. By this shape, the hook member may have a receiving space through which the protrusion 222 can enter and seat. Among the outer surfaces of the hook member, the surface on which the protrusion 222 can be seated while facing the receiving space is called an inner surface. As such, the hook member is formed so that the protrusion 222 can be caught, and thus, the protrusion 222 may be inserted into and supported by the hook member.

The container part 220 is formed to accommodate the melt (M). The container part 220 may include a container body 221, a protrusion part 222, and a locking part 223. For example, the container unit 220 may be referred to as a ladle.

The container body 221 may include a bottom plate having a predetermined area, and a side wall protruding a predetermined height upward from the edge of the bottom plate. The bottom plate may have a disk shape, and the sidewall may have a hollow cylindrical shape. Of course, this shape need not be particularly limited to the above. The container body 221 may also be referred to as a container.

The container body 221 may have an overall shape of a cylindrical body, and an internal space in which the melt M may be accommodated may be provided. In addition, the upper portion of the container body 221 may be opened. The container body 221 may be formed of refractory material on the inner surface. The protruding portion 222 may be protruded on the side surface of the container body 221.

The protrusion 222 may be referred to as a trinion. The protrusions 222 may be formed to protrude on both sides of the container body 221 in the width direction. The protrusion 222 may be fastened to the hook 218. When the hook portion 218 rises, the projection portion 222 is supported by the hook portion 218 and rises together with the hook portion 218, whereby the container body 221 may rise.

The locking portion 223 may be mounted under the container body 221. The locking portion 223 may be caught on a hook hook (not shown) of the transfer portion 210. The locking portion 223 may include, for example, a tilting arm, a hook holder, and a detachable bar. The Gyeongdong arm is rotatably mounted on the bottom surface of the container body 221, and the winding hook is mounted on the Gyeongdong arm so as to face the side of the container body 221, and the detachable bar is mounted on the side of the container body 221. You can. A voucher hanger can be placed on the detachable bar.

The gas supply unit 230 includes a plurality of parts. The plurality of parts may be mounted on the container part 220 and the transfer part 210, respectively, and may be interconnected. The plurality of parts are provided with couplings 236 and 237, respectively, at portions where the protrusions 222 and the hooks 218 come into contact (referred to as 'contacting portions'). Couplings 236 and 237 are mutually coupled and disengageable. A plurality of parts can be interconnected through the couplings 236 and 237.

The first part of the plurality of parts is supported by the vehicle body 211 and may extend toward the hook portion 218. The first part includes a storage container 231, a flow controller 232, a first cable 233A, a plurality of valves 234A, 234B, a plurality of reels 235A, 235B, and a first coupling 236. It can contain. The storage container 231 may be filled with gas and stored therein. Here, the gas may include argon gas. Of course, any gas may be used as long as the gas is a kind that can be blown into the melt (M). The storage container 231 may be, for example, a gas tank. The storage container 231 may be mounted on the upper surface of the vehicle body 211, but if the position can be supported by the vehicle body 211, the mounting location may vary. The amount of gas (g) stored in the storage container 231 may vary. For example, the amount of gas (g), which can continue bubbling for 20 minutes under strong bubbling conditions described below, and can continue bubbling for up to 60 minutes under weak bubbling conditions described later, will be stored in the storage container 231. You can.

The flow controller 232 may be, for example, a mass flow controller (MFC). Of course, the flow controller 232 may be variously changed within a range that satisfies that the flow rate of the gas (g) can be adjusted in addition to the MC. For example, a solenoid valve controlled by a control board may be used as the flow controller 232.

The flow controller 232 is disposed at a predetermined position on the vehicle body 211 and may be mounted on the first cable 233A. The flow controller 232 may adjust the flow rate of the gas g passing through the inside of the first cable 233A.

The first cable 233A may connect the storage container 231 and the first coupling 236. The first cable 233 may be wound or unwound on a plurality of reels 235A and 235B to adjust the length. The first cable 233 may be provided with a gas flow path therein. The first cable 233A may also be referred to as a first hose.

The plurality of reels 235A and 235B may be mounted on the transfer unit 210 to support the first cable 233A. The plurality of reels may include a first reel 235A and a second reel 235B. The first reel 235A is mounted on the lower surface of the vehicle body 211, and a part of the first cable 233A may be wound around the outer circumferential surface and supported. The second reel 235B is mounted on the elevator 217 and a part of the first cable 233A may be wound around and supported on the outer circumferential surface. Of course, rather than a plurality of reels, one reel may be provided, and the position may also be installed in various positions as long as the length of the first cable 233A is adjustable while supporting the first cable 233A. .

Multiple reels may also be referred to as multiple pulleys. Even in this case, instead of a plurality of pulleys, one pulley is mounted on the transfer unit 210 to support the first cable 233A, and the length of the first cable 233A can be adjusted.

Gas g may be supplied from the storage container 231 to the first coupling 236 through the gas flow path of the first cable 233A. The gas flow path communicates with the flow controller 232, and the flow rate and flow rate of the gas g can be adjusted by the operation of the flow controller 232.

The first cable 233A may be installed to penetrate the vehicle body 211, the elevator 217, and the hook portion 218. In particular, in the first cable 233A, a portion connected to the first coupling 236 may be disposed inside the vertical member and the hook member. Accordingly, the first cable 233A can be protected from external high temperatures.

The plurality of valves may include a first manual valve 234A and a second manual valve 234B, which are respectively attached to the first cable 233A on both sides of the flow controller 232. The first manual valve 234A is mounted on the first cable 233A between the flow controller 232 and the storage container 231, and the second manual valve 234B has a flow controller 232 and a first coupling ( 236) may be mounted on the first cable (233A). Of course, in addition to the plurality of valves, one valve may be mounted on the first cable 233A, and the mounting position may be varied.

The second part is installed in the container unit 220 and may be connected to the nozzle unit 240. The second part may include a second cable 233B, and a second coupling 237.

The second cable 233B may connect the second coupling 237 and the nozzle unit 240. The second cable 233B is provided with a gas flow path therein, one side is disposed in the protrusion 222, and the other side can be disposed inside the container body 221.

Hereinafter, the first coupling 236 and the second coupling 237 according to an embodiment of the present invention will be described in detail. In this case, the structures of the first coupling 236 and the second coupling 237 described below are examples for explaining an embodiment of the present invention. The structure of these couplings can connect them, for example, between the first cable 233A and the second cable 223B, and is also connected to be detachable from each other to the second cable 223B from the first cable 233A. It may be alternatively applied to various fluid coupling structures within a range that satisfies that gas can be introduced.

The first coupling 236 may be provided on the inner surface of the hook member. At this time, as described above, the inner surface of the hook member is a surface capable of contacting and supporting the lower surface of the protrusion 222, and the shape may be concave in a curved shape.

The first coupling 236 includes a housing 263A, a mount 236B, a cylinder 236C, a rod 236D, a connection terminal 236E, an elastic member 236F, a second opening 236G, and a sealing member (236H).

The housing 236A may be mounted to penetrate the inner surface of the hook member, and the top may be opened. The mount 236B is installed on the bottom surface of the housing 236A. A cylinder 236C may be installed on the mount 236B. Mount 236B is capable of isolating vibration between housing 236A and cylinder 236C. The shape of the housing 236A and the cylinder 236C may be, for example, a cylindrical shape, but may be various other than a rectangular cylinder shape.

The cylinder 236C is installed inside the housing 236A and can be supported on the mount 236B. Inside the cylinder 236C, a plurality of rods 236D are slidably installed in a height direction, for example, in a vertical direction, and connection terminals 236E may be supported on top of these rods. At this time, the plurality of rods 236D may be installed to penetrate the lower portion of the cylinder 236C. The connection terminal 236E may have an upper surface located in the upper opening of the housing 236A, or may protrude thereon. For example, the connection step 236E may be located on the same surface as the inner surface of the hook member. The connection terminal 236E may be referred to as a first block.

The connection terminal 236E can be moved up and down by the lifting of the plurality of rods 236D. At this time, the elastic member 236F is installed on the outer circumferential surface of the plurality of rods 236D, so that the lifting of the connection terminal 236E can be elastically supported. The elastic member 236F may include an elastic spring.

The second opening 236G may be a through hole formed to penetrate the upper surface of the connection terminal 236E. The second opening 236G has an upper end located on the upper surface of the connection terminal 236E, and a first cable 233A may be connected to the lower end. The sealing member 236H may include an O-ring made of heat-resistant fiber or heat-resistant resin or heat-resistant rubber. The sealing member 236H may be mounted on the upper surface of the connection terminal 236E so as to surround the circumference of the second opening 236G.

The second coupling 237 may be provided on the lower surface of the protrusion. The second coupling 237 may include a second block 237A and a second opening 237B. The second block 237A may be mounted to penetrate the lower surface of the protrusion 222. The second opening 237B may be a through hole formed to penetrate the lower surface of the second block 237A. The second opening 237B may be connected to the second cable 233B. In detail, the second opening 237B has a lower end located on the lower surface of the second block 237A, and an upper end connected to the second cable 233B. The structure of the second coupling 236 may be various other than this.

Hereinafter, the operation of the couplings 236 and 237 will be described.

When the protrusion 222 is inserted into the hook member, and the protrusion 222 and the hook member are in close contact with each other, the first coupling 236 and the second coupling 237 are also brought into close contact in the vertical direction. At this time, while the weight of the container body 221 is transmitted to the hook member through the protrusion 222, the protrusion 222 is strongly adhered to the hook member. Thereby, the first coupling 236 and the second coupling 237 are strongly in close contact with each other in the vertical direction, and the connection terminal 236E and the second block 237A are strongly in contact with each other, and at this time, the sealing member 236H ) Between the connection terminal 236E and the second block 237A can be sealed from outside air. Then, the first opening 236G is connected to the second opening 237B, whereby the gas passage of the first part and the gas passage of the second part communicate with each other so that the gas g is supplied to the nozzle part 240. Can be.

As such, the couplings 236 and 237 may be coupled to each other by contact between the protrusion 222 and the hook 218. Of course, when the protrusion 222 and the hook 218 are separated from each other, the coupling of the couplings 236 and 237 can be released from each other accordingly.

The gas supply unit 230 is connected to the second coupling 237 through the first flow rate detector 238A and the second cable 233B connected to the first coupling 236 through the first cable 233A. The first coupling in the storage container 231, utilizing the second flow rate detector 238B, a preset gas injection condition, the detection value of the first flow rate detector 238A, and the detection value of the second flow rate detector 238B. It may further include a flow regulator (238C) for adjusting the flow rate of the gas (g) supplied to (236). For example, for a reason such that the sealing member 236H is worn or a foreign material is attached to the sealing member 236H, the connection terminal 236E and the second block 237A may be exposed to the outside air. In this case, the gas g leaks, and the detection value of the first flow rate detector 238A and the detection value of the second flow rate detector 238B have a difference. The flow regulator 238C determines that the gas g leaks when this difference value occurs and exceeds a predetermined size, and is supplied to the first coupling 236 from the storage container 231 as much as the difference value. Increase the flow rate of gas (g). This control can be continued until the detection value of the second flow rate detector 238B meets the preset gas injection condition. Accordingly, even if a gas (g) leak occurs, the actual gas (g) supply amount supplied to the second coupling 237 can accurately follow a preset gas injection condition.

The nozzle unit 240 is installed in the lower portion of the container unit 220 to inject gas (g) into the interior space of the container unit 220 and may be connected to the gas supply unit 230. More specifically, the nozzle unit 240 may be mounted to penetrate the bottom plate of the container body 221, and may be connected to the second part of the gas supply unit 230. The nozzle unit 240 may be a refractory nozzle made of a porous material, but is not particularly limited.

The transfer device 200 according to an embodiment of the present invention may further include a control unit (not shown). The control unit may control the operation of the gas supply unit 230 using preset gas injection conditions for each transport path, steel type, and component content of the melt. To this end, the control unit can be connected to the flow controller 232.

In addition, the control unit may receive the temperature of the melt M after the first treatment process is completed, and operate the gas supply unit 230 according to the result in comparison with the preset temperature of the received melt M You can decide whether or not. For example, the control unit may operate the gas supply unit 230 when the temperature of the melt M is higher than a preset temperature by a few degrees Celsius to perform gas g injection into the melt M.

The preset temperature (also referred to as the 'reference temperature') is the performance of the second refining process of the previous round or the temperature found through experiments. The preset temperature may be respectively determined according to the steel type of the melt and the transport path. For example, when the melt is started to be transported when the temperature of the melt is a preset temperature, it may be a temperature suitable for performing the second process when the melt reaches the second process. However, if the transfer of the melt is initiated when the temperature of the melt is higher than a preset temperature, the melt may reach an unsuitable temperature for performing the second treatment process when it arrives at the second treatment process.

On the other hand, the temperature of the melt (M) may be the temperature measured from the melt (M) at the time of the transfer start when transferring the melt (M) is the first treatment process is finished to the second treatment process. The temperature of the melt M can be obtained by performing a sampling operation after the first treatment process.

Hereinafter, the operation of the transfer device 200 according to an embodiment of the present invention will be described.

When the transfer device 200 according to the embodiment of the present invention is applied to the secondary refining process of molten steel, the molten steel is transported from the first treatment process to the second treatment process using the transfer part 220 and the container part 210, , By injecting gas (g) into the molten steel, the composition and temperature of the molten steel can be homogenized. Accordingly, the second treatment process can be smoothly performed.

At this time, gas may be injected into the molten steel according to the gas injection conditions (also referred to as 'bubbling conditions') determined by the transport path, the steel type, and the content of the molten steel. Therefore, it is possible to improve productivity and quality of the second treatment process by supplying molten steel having a temperature and component content suitable for the second treatment process.

In addition, the gas (g) may be supplied to the container portion 210 side through the contact portion between the transfer portion 220 and the container portion 210. Thus, while transporting molten steel, gas (g) is injected into the molten steel to bubble the molten steel to rapidly homogenize the components and temperature of the molten steel.

In this case, the coupling parts 236 and 237 provided at the contact portion between the transfer part 220 and the container part 210 may be hermetically sealed from outside air by using the weight of the container part 210. Therefore, it is possible to smoothly inject the gas into the molten steel at a desired injection amount, and to efficiently homogenize the components and temperature of the molten steel.

Hereinafter, gas injection conditions according to an embodiment of the present invention will be described with reference to Table 1 below.

Steel Ingredient content (wt%) Transfer route 1 Transport path 2 Transfer route 3 BAP → LF BAP → RH BAP, LF, RH → Casting Injection Injection condition Injection Injection condition Injection Injection condition W steel [C] 0.03 to 0.08
[Mn] 0.15 ~ 0.25 × - × - ○ 10 ~ 20Nm ³ / h, 5min [C] 0.10 ~ 0.21
[Mn] 0.10 ~ 0.50 ○ 60Nm ³ / h, 1min ○ 60Nm ³ / h, 2min ○ 10 ~ 20Nm ³ / h, 3min P, V steel [S]
0.015 or less ○ 60Nm ³ / h, 1min ○ 60Nm ³ / h, 2min ○ 10 ~ 20Nm ³ / h, 2min

Table 1 above is a table exemplarily showing preset gas injection conditions. Referring to Table 1, W steel is an Al-Killed steel, and is a steel type cast from hot and cold rolled materials. P, V steel is a Si-killed steel and is a steel type cast from thick plates and hot rolled materials.

The transfer path 1 is transferred from the rice process to the L process, the transfer path 2 is transferred from the rice process to the RH process, and the transfer path 3 is transferred from the rice process, LF process or RH process to the continuous casting process Will be. For example, the transfer route is a combination of the origin and destination of Yonggang.

Although the gas supply amount is 10 to 20 Nm ³ / h or not shown in the table, the condition of 20 to 30 Nm ³ / h is referred to as a weak bubbling condition, and the condition where the gas supply amount is 60 Nm ³ / h is referred to as a strong bubbling condition.

The numerical values and component contents in the above-mentioned table are only examples for explaining an embodiment of the present invention, and are not intended to limit the present invention. For reference, the table does not list all the gas injection conditions, but only a part of the gas injection conditions.

On the other hand, the component content of the melt can be obtained by sampling during each process or after the process is over.

Hereinafter, the operation of the control unit will be described with reference to Table 1 and the description of the gas injection conditions.

The control unit may select a strong bubbling condition and a weak bubbling condition for each transport path, steel type, and component content of the melt, and perform bubbling processing for a time set by the corresponding condition.

The control unit receives the steel type and transport path information of the currently processed melt M, and when the first processing process is finished, receives component content information from the melt. Then, the input information can be compared with the above-described table, and according to the result, the operation of the flow regulator 238C of the gas supply unit 230 can be controlled with the gas supply amount and the gas supply time under the corresponding conditions.

For example, the melt that has been processed in the first treatment process is W steel, and the transfer path is transferred from the rice process to the continuous casting process (transfer path 3), and as a result of sampling the melt, the component content of carbon [C] is melted. If 0.03 ~ 0.08wt% of the total weight of the manganese, and the content of manganese [Mn] is 0.15 ~ 0.25wt% of the total weight of the melt, gas (g) at a flow rate of 10-20 is injected into the melt for 5min to bubble. Processing. Thus, while conveying the melt (M) contained in the container portion 220 to the second treatment process, the inclusions are floated and separated from the melt, the temperature of the melt is lowered to an appropriate temperature, and the desired content of the component in the melt is desired. Can be adjusted. That is, the cleanliness of the melt can be improved.

Hereinafter, a transfer method according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. Here, the contents overlapping with the above description of the transfer apparatus 200 according to the embodiment of the present invention will be briefly described, or the description thereof will be omitted.

The transport method according to an embodiment of the present invention uses a preset gas injection condition for each process of transporting the melt processed in the first processing process to the second processing process, the transport path of the melt, the steel type, and the content of the component. During transport, the process involves injecting gas into the melt.

In this case, the first treatment process may be any one of the process selected from the rice process, the LF process, and the RH process, and the second process may be another process selected from the LF process, the RH process, and the continuous casting process. have.

First, a process of transporting the melt M treated in the first treatment process to the second treatment process is performed. Prepare the container portion 220 containing the melt processed in the first treatment process, and the hook portion of the transfer device 200 that can move from one location where the first treatment process is performed to another location where the second treatment process is performed The protrusion 222 of the container 220 is inserted into 218. Thereafter, the hook portion 218 is raised, and the vehicle body 210 is driven to move the transfer device 200 from one location to another.

At this time, in the process of raising the hook portion 218, the coupling portions 236 and 237 provided at the contact portion of the hook portion 218 and the projection portion 222 are connected to each other, and using the weight of the container portion 220 These connection surfaces can be hermetically sealed from outside air.

In addition to performing the above-described process or simultaneously, the process of injecting gas is performed. At this time, first, by using the gas injection conditions to determine the injection flow rate and injection time of the gas, and supply the gas to the container portion 220 side using the contact of the hook portion 218 and the projection 222, the predetermined injection flow rate and According to the injection time, the gas (g) is injected under the melt (M) and the melt is bubbled.

Meanwhile, the above-described process of injecting gas may be selectively performed according to a result of a comparison between a preset temperature and a temperature of the melt.

That is, the container 220 containing the melt processed in the first treatment process is prepared, and at this time, a sampling operation is performed to obtain the temperature of the melt. When the temperature of the melt is compared with a preset temperature, when the temperature of the melt is higher than a preset temperature, for example, several degrees C., a gas (g) injection into the melt M may be performed. At this time, the preset temperature may vary, for example, depending on the steel type and transport path of the molten steel.

When the melt is conveyed to the second treatment process, a second treatment process is then performed.

The above embodiments of the present invention are for the purpose of describing the present invention and not for the limitation of the present invention. It should be noted that the configurations and methods disclosed in the above embodiments of the present invention may be modified in various forms by combining or crossing each other, and such modified examples may be viewed as the scope of the present invention. That is, the present invention will be implemented in a variety of different forms within the scope of the claims and equivalent technical spirit, and various embodiments are possible within the scope of the technical spirit of the present invention. Will be able to understand.

100: first treatment facility 200: transfer device
210: transfer unit 220: container unit
230: gas supply unit 240: nozzle unit
300: second treatment facility

Claims (15)

It is formed to accommodate the melt, the container portion having a projection on the side;
A transfer unit formed to move from the first processing facility to the second processing facility, and having a hook portion to support the protrusion;
A gas supply unit having a plurality of parts mounted on the container unit and the transfer unit, and which can be interconnected; And
It is formed to inject gas into the interior space of the container portion, the nozzle portion connected to the gas supply; includes,
The plurality of parts are provided with couplings on the protrusions and the hooks, respectively, and are connected to each other through the couplings. The method according to claim 1,
The first coupling among the couplings is provided on the inner surface of the hook portion, and the second coupling is provided on the lower surface of the protrusion. The method according to claim 1,
The coupling device is coupled to each other by the contact of the protrusion and the hook portion, the transfer device is released by the separation. The method according to claim 2,
The transfer unit,
A vehicle body formed to be able to travel along the rail;
It is installed on the vehicle body, and further includes a driver for elevating the hook portion:
The first part of the plurality of parts is supported on the vehicle body, and the transport device extends toward the hook portion. The method according to claim 4,
The first part,
A storage container supported by the vehicle body and filled with gas therein;
A first cable that connects the storage container and the first coupling, is adjustable in length, and is provided with a gas flow path therein; And
And a flow controller mounted on the first cable. The method according to claim 4,
The second part of the plurality of parts is installed in the container portion, the transfer device is connected to the nozzle portion. The method according to claim 6,
The second part,
And a second cable connecting the second coupling and the nozzle unit. The method according to claim 5,
The gas supply unit,
A first flow rate detector connected to the first coupling;
A second flow rate detector connected to the second coupling;
And a pre-set gas injection condition, a detection value of the first flow rate detector and a detection value of the second flow rate detector to control the operation of the flow rate controller. The method according to claim 1,
A transfer device further comprising a control unit for controlling the operation of the gas supply unit by using preset gas injection conditions for each transport path, steel type, and component content of the melt. Conveying the melt treated in the first treatment process to the second treatment process;
Conveying method comprising; using a predetermined gas injection conditions for each transport path, steel type and component content of the melt, while transporting the melt, injecting gas into the melt. The method according to claim 10,
The first treatment process is a process selected from the rice process, the LF process, and the RH process,
The second treatment process is a process selected from LF process, RH process and continuous casting process, and a transfer method that is different from the first treatment process. The method according to claim 10,
The transport process,
Preparing a container containing a melt processed in the first treatment process;
Inserting a projection of the container into a hook portion of a transfer device capable of moving from one location where the first processing step is performed to another location where the second processing step is performed;
The process of driving the transfer device from the one position to the other position; includes,
When injecting gas into the melt, the transfer method of supplying gas to the container side by contact of the hook portion and the projection portion. The method according to claim 12,
Transfer method for sealing the contact portion of the hook portion and the projection portion from the outside air by using the weight of the container. The method according to claim 10,
The process of injecting gas,
Determining the injection flow rate and injection time of the gas by utilizing the gas injection conditions;
In accordance with the injection flow rate and injection time, the process of injecting the gas to the lower portion of the melt and bubbling the melt; Transfer method comprising a. The method according to claim 10,
The method of injecting gas is a transfer method selectively performed according to a result of a comparison between a preset temperature and a temperature of the melt.

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