JP2005171282A - Alloy transportation method and alloy carrier vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for preventing an alloy transported to a refining apparatus from igniting and deteriorating. <P>SOLUTION: In the method for transporting the alloy to an alloy storage 108 in the refining apparatus, the alloy carrier vessel 106, in which the alloy 102 is hermetically stored therein, is transported to the upper part of the alloy storage 108, and the alloy 102 hermetically stored in the inner part of the alloy carrier vessel 106 is supplied to the alloy storage 108 from the alloy carrier vessel 106. In order to prevent the alloy from igniting and deteriorating, the internal atmosphere in the alloy carrier vessel 106, the internal atmosphere in the alloy storage 108 and the atmosphere at the interval between the alloy carrier vessel 106 and the alloy storage 108 may be replaced with inert gas. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a technique for supplying an alloy to an alloy storage tank installed in a molten steel refining apparatus.

  In recent years, there has been an increasing need for high-purity steels with a very low content of impurities and non-metallic inclusions. In general, the hot metal produced in the blast furnace is refined in the converter, but it is difficult to achieve a sufficiently high purity and the efficiency is poor only by the converter refining. Therefore, the purity of the hot metal produced in the blast furnace is enhanced by refining treatment called hot metal pretreatment and secondary refining in addition to refining treatment in the converter. At present, the process of blast furnace → hot metal pretreatment → converter → secondary refining is widely adopted as a manufacturing process of high purity steel. In addition to the converter, secondary refining is adopted after refining treatment in an electric furnace.

  As typical equipment for secondary refining, various refining apparatuses of RH type, LF type, DH type, VOD type, and AOD type have been proposed. The RH type refining apparatus is a refining facility that uses a suction type vacuum refining method. The LF refining apparatus is a refining facility that performs refining by immersing electrodes in slag that covers molten steel, heating the slag and molten steel, and blowing argon from a porous plug at the bottom of the pan. The DH type refining apparatus is a refining facility for degassing molten steel by repeating the operation of sucking up the molten steel held in the ladle and the operation of raising the tank and returning the molten steel in the tank to the ladle. The VOD type refining apparatus is a refining facility that applies a refining operation to molten steel inside a ladle placed in a vacuum vessel. The AOD type refining apparatus is a refining facility that performs decarburization by blowing an inert gas together with oxygen gas into molten steel under atmospheric pressure.

  In these secondary refining processes, the components are adjusted by charging the alloy as necessary. In general, the alloy is introduced in such a manner that a predetermined amount of alloy is cut out from an alloy storage tank such as a hopper at a predetermined timing and dropped into molten steel inside the secondary refining equipment (see, for example, Patent Document 1). ).

The alloy storage tank is periodically replenished with the alloy according to the addition status of the alloy. The alloy is transported from the alloy production site to a refining device using a truck or the like, and is first received by a bunker. The alloy thrown into the bunker is transported using transporting means such as a conveyor, and placed into the alloy storage tank.
Japanese Patent Laid-Open No. 10-317051

  So far, no special consideration has been given to the transport form of the alloy. However, some alloys have properties that ignite by collision between alloys, properties that ignite by moisture in the atmosphere, properties that generate gas by moisture in the atmosphere, and the like. Therefore, it is desirable to further improve the safety of the work environment. Further, when the properties of the alloy change due to moisture in the atmosphere, the quality of the molten steel to be refined may be deteriorated.

  Accordingly, an object of the present invention is to provide means for preventing ignition and alteration of an alloy conveyed to a refining apparatus.

The present invention
(1) A method for transporting an alloy to an alloy storage tank of a refining apparatus, wherein an alloy transport container in which the alloy is sealed is transported above the alloy storage tank, and the alloy is sealed in the alloy transport container Supplying the alloy from the alloy transfer container to the alloy storage tank,
(2) The alloy transport method according to (1), wherein the inner atmosphere of the alloy transport container is replaced with an inert gas,
(3) The alloy transport method according to (1) or (2), characterized in that the internal atmosphere of the alloy storage tank is replaced with an inert gas,
(4) When supplying the alloy from the alloy transport container to the alloy storage tank, the atmosphere between the alloy transport container and the alloy storage tank is replaced with an inert gas. 1) to the alloy transport method according to any one of (3),
(5) It has an openable / closable alloy inlet for pouring the alloy into the interior and an openable / closable bottom for dropping the alloy to the lower part, and can be transported above the alloy storage tank of the refining apparatus Alloy transport container, characterized by
It is.

  If this invention is used, possibility that the alloy conveyed to the refining apparatus will ignite is reduced more, and further safety | security is ensured. Moreover, alteration of the alloy during the conveyance to the refining apparatus is suppressed.

  First, a general alloy conveying method at present will be described with reference to FIG. FIG. 3 is a schematic view of a conventionally used alloy transport method.

  The alloy 302 to be replenished to the alloy storage tank is conveyed by a conveying means 304 such as a truck from the alloy production site. At present, the alloy 302 that has been transported is first put into the receiving bunker 306.

  Usually, the bunker 310 used for putting the alloy into the alloy storage tank 308 and the alloy storage tank is higher than the ground. For this reason, the alloy 302 put into the receiving bunker 306 from the truck is pulled up using the belt conveyor 312. The alloy 302 pulled up by the belt conveyor 312 is conveyed to above the bunker 310 by the belt conveyor 314. Thereafter, the alloy 302 is put into the bunker 310 and the alloy is stored in the alloy storage device 308. A predetermined amount of the alloy stored in the alloy storage device 308 is cut out at a predetermined time by the alloy cutting device 316 and added to the molten steel.

  However, when such a conveyance system is used, there is a concern that, in some cases, ignition occurs when the alloy is an ignitable alloy. Specifically, at the point A where the alloy is supplied from the receiving bunker 306 to the belt conveyor 312, the point B where the alloy is supplied from the belt conveyor 312 to the belt conveyor 314, and the point C where the alloy is supplied from the belt conveyor 314 to the bunker 310. Will collide with each other. There is concern that the alloy being transported may ignite due to this collision. Further, at the point D where the alloy is open to the atmosphere, there is a concern that the alloy may be ignited by moisture in the atmosphere or water leaked from the rain.

  Another problem is the reaction of the alloy being transported with moisture in the atmosphere. Due to the reaction between the alloy and moisture, the alloy may be altered or gas may be generated. Alloy alteration can reduce the quality of the refined molten steel.

  Therefore, it is important to ensure the safety of the work environment around the refining apparatus more reliably. In addition, it is important that the alteration of the alloy due to the reaction between moisture in the atmosphere and the alloy is further suppressed.

  These problems are solved by the present invention. A first aspect of the present invention relates to a method for preventing ignition and alteration of an alloy by transporting an alloy transport container above an alloy storage tank and supplying the alloy from the alloy transport container located above to the alloy storage tank. That is, the first of the present invention is a method for transporting an alloy to an alloy storage tank of a refining apparatus, wherein an alloy transport container in which an alloy is sealed is transported above the alloy storage tank, and the alloy transport container An alloy transportation method in which an alloy sealed inside is supplied from the alloy transport container to the alloy storage tank.

  First, the outline of the present invention will be described with reference to the drawings. However, the illustrated embodiment is merely one embodiment, and the technical scope of the present invention is not limited to the illustrated embodiment.

  FIG. 1 is a schematic view of the alloy transportation method of the present invention. The alloy 102 is conveyed from the alloy production site by a conveying means 104 such as a truck. The alloy 102 is sealed inside the alloy transfer container 106. Since the alloy 102 is transported in a sealed state inside the alloy transport container 106, it is possible to prevent moisture in the atmosphere from reacting with the alloy during the transport by the transport means 104.

  The alloy transport container 106 transported to the periphery of the refining apparatus is transported above the alloy storage tank 108 provided in the refining apparatus. First, the alloy transfer container 106 is lifted by the lifting means 110 such as a hoist crane. As shown in FIG. 1, when the bunker 112 is arranged on the upper part of the alloy storage tank 108, the alloy transport container is such that the alloy discharge surface of the alloy transport container 106 is higher than the alloy input surface of the bunker 112. 106 is lifted. Thereafter, the lifting means 110 is moved in the horizontal direction, and the alloy transport container 106 is transported above the alloy storage tank 108. In the present application, the “alloy storage tank” means a portion where the alloy is finally stored before the alloy is added to the molten steel. Usually, a necessary amount of alloy is taken out from the alloy storage tank 108 at a necessary time and added to the molten steel supplied to the refining apparatus.

  After adjusting the positions of the discharge port of the alloy transfer container 106 and the input port of the bunker 112, the discharge port of the alloy transfer container 106 is opened and the alloy is dropped onto the bunker 112. The alloy is supplied to the alloy storage tank 108 via the bunker 112. When the replenishment of the alloy to the alloy storage tank 108 is completed, the discharge port of the alloy transfer container 106 is closed, and the alloy transfer container 106 is returned to the transfer means 104. The alloy transport container 106 is transported to an alloy manufacturing site and used for transporting further alloys.

  In the method of the present invention, the alloy is transported in a sealed state inside the alloy transport container 106 until it is supplied to the alloy storage tank 108. If the alloy is transported in a sealed state inside the alloy transport container 106, the alloys do not collide violently. For this reason, ignition of the alloy in the conveyance process is prevented. In addition, since the alloy is sealed inside the alloy transport container 106, alloy alteration and gas generation due to the reaction between moisture in the atmosphere and the alloy are also suppressed. That is, according to the present invention, the safety of alloy transportation is further enhanced, and the alteration of the alloy added to the refining apparatus is prevented.

  Next, the equipment configuration, materials, conditions, etc. used in the method of the present invention will be described in detail. However, the technical scope of the present invention is not limited to the embodiments described below. Moreover, well-known knowledge can be applied to matters not specifically described. For example, the mechanical structure of the hoist crane is not particularly mentioned, but a structure used in a commercially available hoist crane can be adopted. The structure of the hoist crane may be improved based on a known mechanical structure.

  The alloy to be conveyed is not particularly limited as long as it is an alloy added to the refining apparatus. The type of alloy stored in the alloy storage tank may be determined according to the purpose of refining. The method of the present invention is particularly beneficial when the alloy being transported is a highly ignitable alloy or a water-inhibiting alloy.

  The particle size of the alloy to be conveyed is not particularly limited, but in consideration of ease of supply and ease of mixing when added to the molten steel, the particle size may be controlled to about 3 to 30 mm. preferable. However, the present invention is not limited to this range.

  The alloy transport container is a container that can seal the alloy inside and can be transported above an alloy storage tank installed in the refining apparatus. In some cases, a conveying means such as a truck may self-propel to the upper side of the alloy storage tank. However, if the building is designed so that the transport means can move above the alloy storage tank, the equipment cost increases, and it may be difficult to improve or modify the alloy transportation process. For this reason, it is preferable to use an alloy transfer container that is removable from the transfer means.

  In the present application, in addition to the alloy transport method, an alloy transport container that is used for transporting the alloy and is removable from the transport means is provided. That is, as a second aspect of the present invention, an openable and closable alloy inlet for pouring the alloy into the interior and an openable and closable bottom for dropping the alloy to the lower part and above the alloy storage tank of the refining apparatus An alloy transport container is provided that is transportable. Here, the alloy transport container of the present invention will be described in detail.

  FIG. 2 is a schematic view of an embodiment of the alloy transport container according to the second aspect of the present invention.

  The alloy 202 to be transported is put into an alloy transport container 204 that can be sealed. The size of the alloy transport container 204 may be determined in consideration of the transport efficiency to the alloy storage tank and the ease of transport. If priority is given to transport efficiency, the volume of the alloy transport container 204 may be increased. However, if the alloy transfer container 204 is large, the load on the transfer means and the hanging means increases. If priority is given to the ease of transport, the volume of the alloy transport container 204 may be reduced. Considering these circumstances, the size of the actually used alloy transport container 204 may be determined.

  The alloy transfer container 204 has an openable / closable alloy inlet 206 for charging the alloy and an openable / closable bottom 208 for dropping the alloy downward. The alloy charging port 206 is opened and closed when the alloy 202 is charged into the alloy transfer container 204. The alloy inlet 206 may have a lid shape or a window shape. If the alloy can be charged, the shape and size of the alloy charging port are not particularly limited. The bottom 208 is opened after the alloy transport container 204 is transported above the alloy storage tank. Examples of the opening / closing means provided at the bottom 208 include a slide gate and a flapper gate. The slide gate and lid may be opened and closed manually or electrically opened and closed. When opening and closing electrically, a connector is installed in the container, and a power supply cable is prepared at a location where the alloy transport container is transported.

  During the transfer of the alloy, the alloy inlet 206 and the bottom 208 are closed, and the alloy transfer container 204 is sealed. From the viewpoint of ensuring sealing performance, a packing or a flange is preferably used for the lid and the bottom portion 208 of the alloy inlet 206 that can be opened and closed.

  The material of the alloy transport container 204 is not particularly limited, and an iron plate or the like is used. In order to improve fire resistance, a refractory may be arranged on the lining. The shape of the alloy transport container 204 is not particularly limited. In order to drop the alloy stably and reliably, the diameter of the bottom 208 from which the alloy is discharged may be narrowed as shown in FIG. Further, when the alloy is dropped into the alloy storage tank, it is preferable that the vicinity of the bottom 208 has a certain degree of inclination in order to prevent the alloy from remaining inside.

  The alloy transfer container 204 can be transferred above the alloy storage tank of the refining apparatus. In the present application, “can be transported” means a state where transport is planned using a transport device such as a crane or a lift. For example, an alloy transfer container provided with a suspension means for lifting by a crane corresponds to “can be transferred”. On the other hand, an alloy transport container that is completely fixed on the truck and is not scheduled to be transported with the alloy transport container alone removed can be transported only when the truck itself is disassembled. Does not fall under "Yes".

  In the present application, “upward” means a direction in which the height from the ground is high. That is, the position where the alloy inside the alloy transfer container 204 can be supplied to the alloy storage tank of the refining apparatus using only gravity is “above the alloy storage tank”.

  The means for transporting the alloy transport container 204 above the alloy storage tank is not particularly limited. Examples of the means for transporting the alloy transport container 204 above the alloy storage tank include a suspension unit 210 that is used when the alloy transport container 204 is lifted by the lifting means. When the alloy transport container 204 is transported above the alloy storage tank, as shown in the figure, the chain 212 inserted into the suspension section 210 is hooked on the crane 214 of the suspension means.

  In the process of transporting the alloy, if the inside of the alloy transport container 204 is replaced with an inert gas, ignition during transport is more reliably prevented. In order to achieve this object, the alloy transfer container 204 may be provided with an inert gas inlet for supplying an inert gas into the container. However, the inside can be replaced with an inert gas even in the alloy transfer container 204 in which the inert gas inlet is not installed. For example, before opening the lid and introducing the alloy, the gas tube is introduced into the container, and the gas is allowed to flow to replace the interior of the container with an inert gas. Thereafter, the alloy is charged. After the alloy is charged, the gas pipe may be charged inside the container and the gas may flow. By such means, the inside of the container can be substantially replaced with an inert gas.

  The alloy transfer container 204 may have a chute 216 for reliably supplying the alloy to the alloy storage tank at the lower part of the alloy transfer container. When supplying the alloy to the alloy storage tank, the tip of the chute 216 is preferably connected to a bunker, a hopper, or the like. Further, when dropping the alloy from the alloy transport container 204, it is preferable to connect the chute 216 and the alloy charging port of the bunker or hopper and replace the alloy charging path with an inert gas. By replacing the alloy charging path with an inert gas, a fire resulting from the collision of the alloy during the charging of the alloy is prevented. If the alloy surely falls from the alloy transport container 204 without the chute 216, the chute 216 may not be installed. For example, when a chute part connected to the bottom part 208 is formed on the bunker or hopper side into which the alloy is charged, the chute part may not be formed on the alloy transport container 204 side.

  The alloy transfer container 204 may be provided with a jig for holding the alloy transfer container 204 on the upper part of the transfer means or the alloy storage tank. When the alloy transport container 204 is not fixed at the time of alloy transport or alloy fall, there is a risk that the alloy transport container may fall down during the transport, or the alloy may be scattered to the periphery during replenishment of the alloy. These problems are prevented by providing the alloy transport container 204 with a jig for preventing the alloy transport container from being overturned during transportation or a jig capable of attaching the alloy transport container above the alloy storage tank. The jig may be a small part such as a metal fitting for hanging a chain installed on the side surface of the alloy transport container, or a large part such as a leg for self-supporting the alloy transport container. Good.

  Hereinafter, the description returns to the first alloy transportation method of the present invention.

  The alloy sealed inside the alloy transport container is transported above the alloy storage tank. The method of transporting the alloy storage tank upward is not particularly limited, but as shown in FIG. 1, the alloy transport container 106 is lifted using a lifting means 110 such as a hoist crane, and the lifting means 110 is lifted upward of the alloy storage tank. The method of moving the is simple. As the lifting means 110 such as a hoist crane, various commercially available products can be used. Since the meaning of “above the alloy storage tank” is as described above, the description thereof is omitted here.

  After the alloy transfer container 106 is transferred above the alloy storage tank 108, the alloy is supplied to the alloy storage tank 108. In this application, “supply to the alloy storage tank” means that the alloy is dropped directly from the alloy transfer container to the alloy storage tank, and the alloy is indirectly transferred from the alloy transfer container to the alloy storage tank via other equipment. A mode of supplying is included. As long as the alloy is supplied from the alloy transfer container 106 above the alloy storage tank 108, the mode is not particularly limited. The “other equipment” includes the bunker 112.

  In some cases, the alloy may be supplied onto a belt conveyor, and the alloy may be supplied to the alloy storage tank via the belt conveyor. However, attention should be paid to the reaction between moisture in the atmosphere and the alloy and the ignition when supplying the alloy to the belt conveyor while being conveyed on the belt conveyor. For example, it is preferable to take improvements such as disposing a belt conveyor in the pipe and flowing an inert gas through the pipe. When the conveying time by the belt conveyor is short, when the ignitability and water prohibition of the alloy to be conveyed are not so high, the periphery of the belt conveyor may not be replaced with an inert gas.

  The method using the belt conveyor requires the equipment cost of the belt conveyor itself, and also requires the equipment cost for performing a special treatment such as replacing the periphery of the belt conveyor with an inert gas. Therefore, the alloy is preferably supplied from the alloy transfer container 106 to the bunker 112 or the alloy storage tank 108 without using a horizontal moving means such as a belt conveyor. However, this does not exclude the aspect of using a belt conveyor. For example, when the present invention is applied to an existing facility, if the alloy transport container 106 cannot be transported to a position directly above the bunker 112 or the alloy storage tank 108 due to the configuration of the facility, the bunker 112 or The alloy transfer container 106 may be transferred to the vicinity of the alloy storage tank 108 and a belt conveyor may be used for the subsequent transfer.

  When discharging the alloy from the alloy transfer container 106, it is preferable to drop the alloy by opening the bottom of the alloy transfer container. The method of opening the bottom is simple, and there is less collision between alloys compared to the method of rotating the alloy transport container itself.

  The alloy may be supplied directly from the alloy transfer container 106 to the alloy storage tank 108, or may be supplied indirectly via the bunker 112 or the like. If the bunker 112 is not necessary, it may not be installed.

  In the process of transporting the alloy to the alloy storage tank, the atmosphere around the alloy is preferably replaced with an inert gas. By replacing the atmosphere around the alloy with an inert gas, even if the alloys collide violently, they do not ignite. Further, alteration of the alloy by water or oxygen in the atmosphere is prevented.

  Preferably, the inner atmosphere of the alloy transfer container is replaced with an inert gas. By replacing the internal atmosphere of the alloy transfer container with an inert gas, ignition due to vibration during transfer and alteration of the alloy due to moisture in the atmosphere are prevented.

  The atmosphere inside the alloy storage tank may be replaced with an inert gas. By replacing the internal atmosphere of the alloy storage tank with an inert gas, ignition due to collision of the alloy when the alloy is put into the alloy storage tank and alteration of the alloy due to moisture in the atmosphere are prevented.

  In order to more reliably prevent alloy ignition and alteration of the alloy due to moisture in the atmosphere, when supplying the alloy from the alloy transport container to the alloy storage tank, the atmosphere between the alloy transport container and the alloy storage tank is It may be replaced with an inert gas. By replacing the atmosphere between the alloy transport container and the alloy storage tank with an inert gas, ignition due to collision of the alloy when supplying the alloy from the alloy transport container to the alloy storage tank, and Alteration is prevented.

  As the inert gas, various inert gases such as nitrogen gas can be used in addition to rare gases such as helium gas, neon gas, and argon gas. Among the inert gases, nitrogen gas is preferable in consideration of gas cost.

  A necessary amount of the alloy stored in the alloy storage tank 108 is taken out and added to the molten steel in order to adjust the components of the molten steel supplied to the refining apparatus. An alloy cutting device 114 such as a rotary feeder is used as a device for taking out a predetermined amount of alloy at a predetermined timing. Unscheduled alloy additions can reduce the quality of the molten steel being refined. For this reason, it is important to accurately control the addition timing and addition amount of the alloy.

  The amount of cut out alloy can be controlled by measuring the rotational speed of the rotary feeder, the mass of the alloy contained in the alloy storage tank, and the like. A method of controlling the amount of cut out alloy by changing the rotation speed of the rotary feeder is simple. However, since the amount of addition varies depending on the particle size of the alloy, the filling rate of the alloy, etc., it is preferable to obtain knowledge about the amount of alloy supply in advance.

  The refining apparatus to which the alloy is added is not particularly limited. Various refining apparatuses such as an RH refining apparatus, an LF refining apparatus, a DH refining apparatus, a VOD refining apparatus, and an AOD refining apparatus are used.

  The RH type refining apparatus usually has a vacuum chamber in which two pipes immersed in a ladle are installed. Of the two pipes, the molten steel is sucked up from one pipe, and the molten steel sucked up from the other pipe is returned to the ladle. The RH refining apparatus is suitable for processing a large amount of molten steel because of its high reflux rate. The refining function may be expanded by improvements such as supplying pure oxygen gas into the vacuum chamber.

  The LF refining apparatus is one of refining apparatuses that do not perform vacuum processing. An electrode is immersed in the slag covering the molten steel, and the slag and the molten steel are heated. Furthermore, molten steel is refined while blowing argon from a porous plug at the bottom of the pan and stirring.

  In the DH type refining apparatus, one dip tube is installed to suck up the molten steel held in the ladle into the vacuum chamber. Molten steel is sucked up from the dip tube, the vacuum chamber is raised, and the sucked molten steel is returned to the ladle. This operation is repeated to degas the molten steel.

  In the VOD type refining apparatus, a ladle to which molten steel is supplied is placed inside a vacuum chamber. A VOD type refining apparatus is used for refining special steel that is difficult to refining in an air atmosphere. Like a VOD type refining apparatus, the ladle may have a ladle disposed therein.

  AOD refining equipment is mainly used for stainless steel. Inert gas is blown into the molten steel together with oxygen gas under atmospheric pressure, and decarburization is performed while suppressing chromium oxidation. The form and function is similar to the converter in the refining of ordinary steel.

  As described above, there are various types of refining apparatuses, but the alloys transported by the method of the present invention can be applied to various refining apparatuses in which molten steel is supplied and alloys are added to the molten steel.

It is the schematic of the alloy transportation method of this invention. It is the schematic of one embodiment of the alloy conveyance container of this invention. It is the schematic of the alloy transport method used conventionally.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 102 ... Alloy, 104 ... Conveying means, 106 ... Alloy conveying container, 108 ... Alloy storage tank, 110 ... Lifting means, 112 ... Bunker, 114 ... Alloy cutting apparatus.

  202 ... alloy, 204 ... alloy carrier, 206 ... alloy inlet, 208 ... bottom, 210 ... hanging part, 212 ... chain, 214 ... crane, 216 ... chute part.

  302 ... Alloy, 304 ... Conveying means, 306 ... Receiving bunker, 308 ... Alloy storage tank, 310 ... Bunker, 312 ... Belt conveyor, 314 ... Belt conveyor, 316 ... Alloy cutting device.

Claims (5)

A method of transporting an alloy to an alloy storage tank of a refining device,
An alloy transport container in which an alloy is sealed is transported above the alloy storage tank,
An alloy transportation method, wherein an alloy sealed inside the alloy transportation container is supplied from the alloy transportation container to the alloy storage tank.   2. The alloy transport method according to claim 1, wherein an inner atmosphere of the alloy transport container is replaced with an inert gas.   The alloy transport method according to claim 1, wherein an internal atmosphere of the alloy storage tank is replaced with an inert gas.   When supplying the alloy from the alloy transport container to the alloy storage tank, the atmosphere between the alloy transport container and the alloy storage tank is replaced with an inert gas. 4. The method for transporting an alloy according to any one of 3 above. An alloy inlet that can be opened and closed to put the alloy inside,
With an openable bottom for dropping the alloy to the bottom,
An alloy transport container which is transportable above an alloy storage tank of a refining apparatus.

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