JP2010169296A - Material charging device, method of charging material, and melting furnace system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a material charging device capable of elongating its service life, a method of charging a material by using the material charging device, and a melting furnace system including the material charging device, capable of charging the material through a charging port of a melting furnace and suppressing deterioration caused by the heat from the melting furnace. <P>SOLUTION: This material charging device 30 for charging the material into the melting furnace 10 through the charging port 13 formed on the melting furnace 10, includes a body section 40 reciprocating to be close to or separated from the melting furnace 10, and a material holding section 60 holding the material charged into the melting furnace 10, wherein the material holding section 60 is movable in the direction intersecting the reciprocating direction of the body section 40, and reciprocates to be close to or separated from the melting furnace 10 with the body section 40 in a state of projecting from the body section 40 in the direction intersecting the reciprocating direction. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention is, for example, a raw material charging apparatus used when charging a raw material into a melting furnace in a melting furnace for melting a metal material such as iron scrap or Ni alloy, a raw material charging method using this raw material charging apparatus, and the aforementioned The present invention relates to a melting furnace system equipped with a raw material charging apparatus.

Conventionally, as a melting furnace for melting a metal material, various types of furnaces such as an arc furnace, an induction furnace, a grooved furnace, a resistance furnace, and a gas furnace are provided. For example, in the case of Ni-based alloys and iron scrap used under high temperature conditions or as corrosion-resistant alloys, the melting point is relatively high at 1500 ° C. or higher, so the arc-type melting furnace described in Patent Document 1 is used. Yes.

  In such a melting furnace, the raw material is charged into the furnace to be melted, but when scrap scrap is used as the raw material, the apparent specific gravity of scrap scrap is small, so it melts into a molten metal. In this case, the volume is greatly reduced, and it is necessary to add the raw material into the melting furnace. Here, since the molten high-temperature molten metal already exists in the melting furnace, the temperature around the melting furnace is high, and the operation of adding the raw material is extremely harsh.

  In view of this, a raw material charging apparatus for automatically charging a raw material from a charging port provided in a melting furnace is provided. For example, the raw material charging apparatus described in Patent Document 2 is capable of moving forward and backward with a transport carriage that moves between the raw material standby position and the melting furnace inlet, and toward the melting furnace inlet over the transport carriage. A vehicle equipped with an appropriate input cart has been proposed.

JP 2002-286371 A Japanese Patent Laid-Open No. 10-19474

By the way, in the raw material charging device described in the cited document 2, the transfer carriage moves in front of the melting furnace inlet, and the charging carriage moves forward and backward on the transfer carriage toward the melting furnace inlet. Therefore, the input cart and the transport cart are positioned in the opening direction of the input port. For this reason, when the charging port is opened, heat from the melting furnace is directly received by the charging cart and the conveying cart, and there is a possibility that deterioration may occur at an early stage. In particular, since the charging cart is inserted into the melting furnace, there is a problem that the deterioration including the driving portion becomes significant.
Further, in the raw material charging apparatus described in the cited document 2, the rail of the transport carriage that moves between the raw material standby position and the melting furnace charging port is disposed in front of the melting furnace charging port. Then, there is a problem that the temperature measurement work cannot be efficiently performed because the rail interferes when performing other work through the charging port, for example, temperature measurement work of the molten metal. In addition, the presence of rails has been a factor that reduces workability even during repair work of the melting furnace.

  The present invention has been made in view of the above-described circumstances, and it is possible to input a raw material through an inlet of a melting furnace, suppress deterioration due to heat from the melting furnace, and extend the life. It is an object to provide a raw material charging apparatus, a raw material charging method using the raw material charging apparatus, and a melting furnace system equipped with the raw material charging apparatus.

In order to solve this problem, the present invention proposes the following means.
A raw material charging apparatus according to the present invention is a raw material charging apparatus for charging a raw material into the melting furnace through a charging port provided in the melting furnace, and a main body that reciprocates so as to approach and separate from the melting furnace; A raw material holding part for holding the raw material charged into the melting furnace, and the raw material holding part is movable in a direction intersecting the reciprocating direction of the main body part, In a state of protruding from the main body in a direction intersecting the reciprocating direction, the main body reciprocates with the main body so as to approach and separate from the melting furnace.

In the raw material charging apparatus configured as described above, the raw material holding part for holding the raw material protrudes in a direction intersecting the reciprocating direction of the main body part so as to approach and separate from the melting furnace together with the main body part. Therefore, when inserting the raw material holding part into the melting furnace input port, it is possible to input the raw material without arranging the main body part to face the opening direction of the input port. Thus, premature deterioration due to heat of the main body can be prevented.
In addition, when placing the raw material on the raw material holding part, the main body part can be positioned away from the melting furnace, and the raw material holding part can be further away from the opening direction of the charging port. The load can be reduced.

Here, it is preferable to adopt a configuration in which the raw material holding part is connected to the main body part via a swinging mechanism that swings about an axis extending in the reciprocating direction of the main body part.
In this case, the raw material holding part is moved in a direction intersecting the reciprocating movement direction of the main body part by a swinging mechanism that swings about an axis extending in the reciprocating direction of the main body part. . Therefore, the raw material holding unit can be moved to a position away from the charging port, and the raw material can be placed on the raw material holding unit, so that the load of the raw material charging operation can be reduced.

In addition, the raw material holding portion includes an arm portion extending along a reciprocating direction of the main body portion, a bucket portion provided at a tip of the arm portion, and the bucket portion extending in the extending direction of the arm portion. It is preferable to include a rotation drive mechanism that rotates as an axis.
In this case, the raw material can be reliably charged into the melting furnace by inserting the tip of the arm part into the melting furnace from the charging port and rotating the bucket part.

Furthermore, it is preferable that the raw material holding part is configured to be detachable from the main body part.
In this case, since the raw material holding part inserted into the melting furnace is easily deteriorated as compared with the main body part, the life of the main body part can be further extended by replacing only the raw material holding part. Further, maintainability is improved, and the use cost of this raw material charging device can be reduced.

  A raw material charging method according to the present invention is a raw material charging method in which a raw material is charged into the melting furnace through a charging port provided in the melting furnace using the above-described raw material charging device, the position being separated from the charging port. And the raw material holding part is inserted into the charging port in a state protruding from the main body part in a direction intersecting the reciprocating direction, and the raw material is charged into the melting furnace. And

  According to the raw material charging method of this configuration, the raw material is placed on the raw material holding part at a position away from the charging port, and the raw material holding part intersects the reciprocating direction from the main body part. It is possible to insert the raw material into the melting furnace while protruding into the melting furnace, reduce the load of the raw material charging work, and reliably feed the raw material into the melting furnace .

  A melting furnace system according to the present invention includes a melting furnace having an inlet into which a raw material is charged and the above-described raw material charging device, and the main body reciprocates at a position deviated from the opening direction of the charging port. It is arranged to move.

  According to the melting furnace system having this configuration, the main body is not positioned near the charging inlet of the melting furnace, and there is no need to provide a rail or the like in the vicinity of the charging inlet. For this reason, when performing the temperature measurement work and the maintenance work through the insertion port, there is no interference and these work can be performed efficiently.

  According to the present invention, a raw material charging apparatus capable of supplying a raw material through a charging furnace inlet and suppressing deterioration due to heat from the melting furnace and extending the life of the raw material charging apparatus, can be provided. And a melting furnace system equipped with the raw material charging apparatus can be provided.

It is a plane explanatory view of a melting furnace system which is an embodiment of the present invention. It is side surface explanatory drawing of the melting furnace system shown in FIG. It is the figure which looked at the raw material injection | throwing-in apparatus which is embodiment of this invention from the base end side. It is plane explanatory drawing of the raw material injection | throwing-in apparatus which is embodiment of this invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 to 4 show a raw material charging apparatus 30 according to an embodiment of the present invention and a melting furnace system 1 including the raw material charging apparatus 30 and a melting furnace 10.
The melting furnace system 1 according to the present embodiment is used for melting a metal having a relatively high melting point such as a Ni-based alloy.

First, the melting furnace 10 will be described. Since the melting furnace 10 is used for melting a metal having a relatively high melting point as described above, it is an arc melting furnace. As shown in FIGS. 1 and 2, a furnace body having a bottomed cylindrical shape. 11 and a lid portion 17 for closing the upper opening of the furnace body 11.
The lid portion 17 is configured to swing around the support shaft 18 to open and close the upper opening of the furnace body 11. Further, an insertion hole 19 penetrating in the thickness direction is formed in the lid portion 17, and an electrode rod for arc discharge (graphite electrode rod in the present embodiment) can be inserted through the insertion hole 19. Yes.

The furnace body 11 is provided with a spout 12 for pouring molten metal melted inside the furnace body 11 in a part of the upper part of the side surface, and is tilted by tilting means (not shown), It is comprised so that the molten metal inside the furnace main body 11 may be poured out outside.
An inlet 13 for additionally charging the raw material into the furnace body 11 is provided at a position facing the spout 12 when the furnace body 11 is viewed from above. The insertion port 13 is openable and closable and connected to the exhaust hood 14.

Next, the raw material input apparatus 30 which is this embodiment is demonstrated. As shown in FIG. 2, the raw material charging apparatus 30 is disposed on the floor surface of the stage unit 21 provided on the side of the melting furnace 10.
The raw material charging device 30 is connected to the main body 40 that reciprocates so as to approach and separate from the melting furnace 10 and the raw material that is additionally charged into the melting furnace 10 is placed thereon. And a raw material holding unit 60.

  The main body 40 includes a carriage unit 41 that travels on the rail unit 22 provided on the floor surface of the stage unit 21, a main body drive unit 49 disposed on the carriage unit 41, and a raw material holding unit 60. The first arm portion 47 to be connected, the support shaft portion 51 on which the first arm portion 47 is pivotally supported, and the swing drive portion 57 that swings the first arm portion 47 about the support shaft portion 51. And.

The rail portion 22 is provided on the floor surface of the stage portion 21 with two bars having a U-shaped cross section so that the U-shaped opening sides face each other.
The carriage part 41 is disposed on the top plate part 42, a projecting part 43 facing downward from the top plate part 42, a shaft part 44 supported by the projecting part 43, and both ends of the shaft part 44. The wheel part 45 is provided. The wheel portion 45 is inserted into a bar having a U-shaped cross section constituting the rail portion 22, and the carriage portion 41 reciprocates along the rail portion 22.

On the top plate part 42 of the carriage part 41, a main body drive part 49 for reciprocating the main body part 40 along the rail part 22 is placed, and extends upward so as to be orthogonal. A support plate 46 is erected. On the support plate 46, the above-described swing drive unit 57 and the support shaft portion 51 are arranged so as to be orthogonal to the support plate 46.
The swing drive unit 57 is a rotary drive body such as a rotary drive motor, for example, and a drive gear 58 is disposed at one end thereof (in the present embodiment, the melting furnace 10 side as shown in FIG. 2).

  In addition, the support shaft portion 51 is provided with a transmission gear 52 that meshes with the drive gear 58 of the swing drive portion 57 at one end thereof (in the present embodiment, the melting furnace 10 side as shown in FIG. 2). It is configured to rotate with the rotation of the drive gear 58 by the dynamic drive unit 57. In this embodiment, as shown in FIG. 3, the outer diameter of the transmission gear 52 is set to be larger than the outer diameter of the drive gear 58. Further, the support shaft portion 51 is provided with a connection portion 53 connected to the first arm portion 47, and a first sprocket 54 for hooking the chain 32 is arranged at the end portion of the connection portion 53. It is installed.

  One end of the first arm portion 47 is connected to the connection portion 53 of the support shaft portion 51 and extends in a direction orthogonal to the extending direction of the support shaft portion 51. 57, the support shaft portion 51 can be swung. On the other end side of the first arm portion 47, a support cylinder portion 48 that supports a raw material holding portion 60 described later is disposed. A bearing (not shown) is provided on the inner peripheral surface of the support cylinder portion 48.

The raw material holding unit 60 includes a second arm unit 61 (arm unit) connected to the first arm unit 47, a bucket unit 68 provided at the tip of the second arm unit 61, and the bucket unit 68 as a second unit. A rotation drive mechanism 69 that rotates about the extending direction of the arm portion 61 as an axis.
The second arm portion 61 is disposed so as to extend in parallel with the reciprocating motion direction of the main body portion 40, that is, the extending direction of the rail portion 22, and the base end portion thereof is the support cylinder portion 48 of the first arm portion 47. A connecting shaft portion 62 is detachably attached to the arm shaft 64, and an arm body 64 extending in the distal direction is detachably attached to a flange portion 63 provided at the distal end of the connecting shaft portion 62.

As shown in FIG. 4, the arm body 64 has a double structure including an outer tube 65 and an inner shaft 66, and is configured such that the outer tube 65 and the inner shaft 66 rotate independently. Yes. The outer tube 65 is connected to the flange portion 63 of the connection shaft portion 62 and is configured to rotate together with the connection shaft portion 62. On the other hand, the inner shaft 66 is configured to be rotated by a rotation drive unit 69 provided in the vicinity of the flange portion 63.
A bucket portion 68 is connected to the tip of the arm main body 64, and the bucket portion 68 is configured to rotate by the above-described rotation driving portion 69.

  The connecting shaft portion 62 is inserted into the support cylinder portion 48 of the first arm portion 47 and is rotatably supported by a bearing. A second sprocket 67 is disposed at the proximal end of the connection shaft portion 62. The chain 32 is hung on the second sprocket 67 and the first sprocket 54 provided at the connecting portion 53 of the support shaft portion 51, and the second sprocket 54 is moved in accordance with the swing (rotation) of the first sprocket 54. The sprocket 67 rotates and the second arm 61 rotates. In the present embodiment, when the first arm portion 47 is swung by the swing driving portion 57, the opening of the bucket portion 68 connected to the tip of the second arm portion 61 is always directed upward. The number of teeth of the first sprocket 54 and the second sprocket 67 is set.

  In the raw material charging apparatus 30 configured in this way, as shown in FIG. 3, when the first arm portion 47 is swung by the swing driving portion 57, the raw material holding portion connected to the first arm portion 47. 60 swings around the support shaft portion 51, and the raw material holding portion 60 moves in a direction orthogonal to the reciprocating direction of the main body portion 40. The main body drive unit 49 and the raw material holding unit 60 are configured to reciprocate along the rail portion 22 so as to approach and separate from the melting furnace 10.

In this embodiment, as shown in FIG. 1, the rail portion 22 is arranged at a position deviated from the opening direction of the charging port 13 of the melting furnace 10 and so as to extend parallel to the opening direction of the charging port 13. The main body 40 is also arranged at a position deviated from the opening direction of the insertion port 13.
Further, when the first arm portion 47 is swung by the swing driving portion 57, as shown by a one-dot chain line in FIG. 1, the position where the raw material holding portion 60 faces the opening direction of the charging port 13 (raw material charging position). Placed in. Further, when the first arm portion 47 is swung to the opposite side, the raw material holding portion 60 is disposed at a position (raw material placement position) that is largely separated from the charging port 13.

  Here, in this embodiment, a protective wall 25 is provided so as to surround the charging port 13 of the melting furnace 10, and the raw material is held on the protective wall 25 at a position where the main body portion 40 is separated from the melting furnace 10. A slit portion 26 through which the first arm portion 47 can pass is provided so that the portion 60 can move outside the protective wall 25.

  In the melting furnace system 1 configured as described above, first, the lid portion 17 of the melting furnace 10 is swung to open the upper opening of the furnace body 11, and scrap scraps are charged into the furnace body 11. . And the cover part 17 is closed, an electrode bar is inserted from the insertion hole 19 of the cover part 17, and scrap scraps are melt | dissolved by arc discharge. Then, since the apparent specific gravity of scrap scrap is small, even when the entire amount is melted, there is no sufficient molten metal in the furnace body 11.

  Therefore, the raw material is additionally charged from the charging port 13 of the furnace body 11 by using the raw material charging device 30 according to this embodiment. First, the raw material is placed on the bucket portion 68 in a state where the main body portion 40 is separated from the melting furnace 10 and the raw material holding portion 60 is disposed at the raw material placement position outside the protective wall 25. Next, the first arm portion 47 is swung by the swing driving portion 57 so that the raw material holding portion 60 is positioned so as to face the opening direction of the charging port 13. Then, the inlet 13 is opened, and the main body drive unit 49 moves the main body 40 along the rail portion 22 so as to be close to the melting furnace 10. Then, the raw material holding part 60 moves close to the melting furnace 10 together with the main body part 40, and the tip of the raw material holding part 60 is inserted into the melting furnace 10 through the charging port 13. Here, the bucket unit 68 is inverted 180 ° by the rotation drive unit 69, and the raw material in the bucket unit 68 is additionally charged into the furnace body 11.

  According to the melting furnace system 1 and the raw material charging apparatus 30 according to the present embodiment, the rail portion 22 is provided at a position deviated from the opening direction of the charging port 13 of the melting furnace 10, and the raw material is charged on the rail portion 22. Since the main body portion 40 of the device 30 is configured to reciprocate, the main body portion 40 is not positioned so as to face the opening direction of the insertion port 13, and the main body unit 40 is heated by hot air from the insertion port 13. Deterioration can be prevented. In addition, since drive system parts such as the main body drive part 49, the swing drive part 57, and the support shaft part 51 are placed on the main body part 40, deterioration of these parts can be prevented, The service life of the charging device 30 can be extended.

  Further, by swinging the first arm portion 47 by the swing drive portion 57, the raw material holding portion 60 connected to the first arm portion 47 swings around the support shaft portion 51, and the raw material holding portion 60. Is configured to move in a direction perpendicular to the reciprocating direction of the main body portion 40, the raw material holding portion 60 is charged even if the rail portion 22 is provided at a position deviated from the opening direction of the charging port 13. The material can be positioned so as to face the port 13, and the raw material holding unit 60 can be inserted into the melting furnace 10 through the charging port 13 to reliably charge the raw material.

  In addition, the operation of placing the raw material on the bucket portion 68 of the raw material holding portion 60 can be performed at a position (raw material placement position) where the raw material holding portion 60 is swung on the side opposite to the charging port 13. It is possible to reduce the load of raw material input work. Further, in the present embodiment, a protective wall 25 is provided so as to surround the vicinity of the charging port 13, and the raw material placement position is outside the protective wall 25, that is, a position separated from the charging port 14 by the protective wall 25. Therefore, the raw material placing operation can be performed without being affected by the heat from the charging port 13.

In addition, since the bucket portion 68 is configured to rotate 180 ° by a rotation drive portion 69 provided at the base end portion of the arm body 64, the bucket portion 68 inserted into the melting furnace 10 is rotated to rotate the bucket The raw material in the section 68 can be reliably charged into the melting furnace 10.
Furthermore, in this embodiment, the chain 32 is hung on the first sprocket 54 provided on the support shaft portion 51 and the second sprocket 67 provided on the connection shaft portion 62 of the second arm portion 61. When the first arm portion 47 is swung by the swing driving portion 57, the first sprocket 54 and the first sprocket 54 are arranged so that the opening of the bucket portion 68 connected to the tip of the second arm portion 61 always faces upward. Since the number of teeth of the two sprockets 67 is set, the raw material does not fall from the bucket part 68 when the raw material holding part 60 is swung.

  Moreover, since the raw material holding part 60 is configured to be detachable from the main body part 40, only the raw material holding part 60 which is directly opposed to the opening direction of the charging port 13 and easily deteriorates can be used by being exchanged. it can. Furthermore, in the present embodiment, the second arm portion 61 of the raw material holding portion 60 is configured to be separated into the base end side connecting shaft portion 62 and the distal end side arm main body 64, so that the melting furnace 10 side Only the arm main body 64 which is disposed close to and easily deteriorates at an early stage can be replaced and used. Thereby, the lifetime extension of the raw material injection | throwing-in apparatus 30 can be aimed at further.

  Further, as described above, it is not necessary to dispose the main body portion 40 of the raw material charging device 30 in the vicinity of the charging port 13 of the melting furnace 10, and the rail portion 22 is not provided in the vicinity of the charging port 13. When performing the temperature measurement work and the maintenance work through the rails, these work can be performed efficiently without interfering with the rail portion 22 and the like.

As mentioned above, although embodiment of this invention was described, this invention is not limited to this, It can change suitably in the range which does not deviate from the technical idea of the invention.
For example, a temperature measuring unit may be attached to the raw material holding unit and the temperature of the molten metal may be measured through the inlet. As described above, by providing the raw material holding part with a jig for performing an operation on the inside of the melting furnace through the inlet, the work in the vicinity of the inlet can be reduced.

  Moreover, although this embodiment demonstrated as what provided the protective wall, it is not limited to this, A protective wall does not need to be provided. However, since the raw material charging operation can be performed in a place isolated from the charging port by the protective wall as in this embodiment, it is preferable to provide a protective wall.

  Further, although the melting furnace has been described as an arc melting furnace, it may be applied to other types of melting furnaces. Furthermore, although it demonstrated as what melt | dissolves Ni base alloy, it is not limited to this, You may melt | dissolve other materials, such as iron scrap.

  In addition, the material holding unit is swung by the swing drive unit, and the material holding unit is described as being configured to move in the direction perpendicular to the reciprocating direction of the main body, but is not limited thereto. For example, the raw material holding part may be moved by a slide mechanism or the like so as to protrude in a direction intersecting the reciprocating direction of the main body part.

DESCRIPTION OF SYMBOLS 1 Melting furnace system 10 Melting furnace 13 Loading port 30 Raw material charging device 40 Main-body part 57 Oscillation drive part (oscillation mechanism)
60 Raw material holding part 61 Second arm part (arm part)
68 Bucket part 69 Rotation drive part (rotation drive mechanism)

Claims (6)

A raw material charging device for charging a raw material into the melting furnace through a charging port provided in the melting furnace,
A main body that reciprocates so as to be close to and away from the melting furnace, and a raw material holding part that holds the raw material charged into the melting furnace,
The raw material holding portion is movable in a direction intersecting with the reciprocating movement direction of the main body portion, and protrudes in a direction intersecting with the reciprocating movement direction from the main body portion. In addition, a raw material charging apparatus that reciprocates so as to approach and separate from the melting furnace.   2. The raw material according to claim 1, wherein the raw material holding portion is connected to the main body portion via a swinging mechanism that swings about an axis extending in the reciprocating direction of the main body portion. Input device.   The raw material holding part includes an arm part extending along a reciprocating direction of the main body part, a bucket part provided at a tip of the arm part, and the bucket part as an axis extending in the extending direction of the arm part. The raw material charging device according to claim 1, further comprising: a rotation driving mechanism that rotates the material.   The raw material charging device according to any one of claims 1 to 3, wherein the raw material holding portion is detachably attached to the main body portion. A raw material charging method for charging a raw material into the melting furnace through a charging port provided in the melting furnace using the raw material charging apparatus according to any one of claims 1 to 4,
The main body is arranged at a position spaced from the charging port, and the raw material holding unit is inserted into the charging port in a state of protruding from the main body in a direction intersecting the reciprocating direction, and the raw material is melted. A raw material charging method characterized by being charged into a furnace. A melting furnace having a charging port into which a raw material is charged, and a raw material charging device according to any one of claims 1 to 4,
The melting furnace system characterized in that the main body portion is arranged to reciprocate at a position deviated from the opening direction of the charging port.

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