JP2869365B2 - Dust collection duct mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a furnace body provided with a furnace body opening at the top and into which a material to be melted is charged and melted, and a furnace body opening for tapping the material to be melted in a molten state. The present invention relates to a dust collection duct mechanism provided in a smoke exhaust system of a furnace having a hot water outlet path connected to a furnace.

[0002]

2. Description of the Related Art An example of this type of furnace is a so-called melting furnace such as a so-called low-frequency induction electric furnace. Conventionally,
In this type of furnace, a substantially annular hollow ring hood formed so as to surround the furnace body opening along the upper end face is provided above the upper end face of the furnace body. An exhaust gas suction port opened on the furnace body opening side was provided. Therefore, the exhaust gas rising from the furnace body opening was sucked by the hollow ring hood, and the exhaust gas could be treated. On the other hand, at the time of tapping, the furnace body is set to the inclined position and the molten material in the molten state is discharged to the ladle via the tapping outflow path. Gas containing dust soars. Therefore, conventionally, such a gas has been collected by a dust collection mechanism provided separately from the furnace.

[0003]

In the above-mentioned prior art, at the time of tapping, it is necessary to move the dust collection mechanism for tapping to the vicinity of the tap hole, which is the end of the tapping outlet, and to operate it. The device configuration became complicated, and the operation control system became complicated. Therefore, there is room for improvement in such a point. Therefore, an object of the present invention is to provide a dust collection duct mechanism that can easily and well collect gas (smoke) generated at the time of tapping.

[0004]

According to the first aspect of the present invention, there is provided a furnace body having a furnace body opening at an upper part, into which a material to be melted is put and melted,
Which is connected to the furnace body opening for tapping the object melt and includes are dust collecting duct flue gas equipment of the furnace having a top side to the tapping outlet passage formed in trough open in a molten state The characteristic structure of the mechanism is that the furnace body is configured so that the posture can be freely changed and the furnace body and the tapping path are provided integrally, and the furnace body opening is provided along the upper end surface above the upper end surface of the furnace body. A first hollow ring hood portion having a substantially annular shape formed so as to surround the first hollow ring hood portion, and the first hollow ring hood portion has an exhaust gas suction port opened to the furnace body opening side,
One end of the first hollow ring hood portion is provided with a lead-out path extension part extending to one end thereof along one side of the tapping lead-out path, and the tapping dust collection is provided at the tip of the lead-out path extension part. An opening, and a second hollow hood portion having the tapping dust collection opening at a tip portion on the other side of the tapping outlet path, and performing a dust collection operation mainly using the first hollow ring hood portion. A switching mechanism for switching between a first dust collection state to be performed and a second dust collection state to mainly perform a dust collection operation mainly at the tapping dust collection opening, wherein the material to be melted is melted in the furnace body and the furnace body is melted. In the melting position in which the vertical position is maintained, dust is collected in the first dust collecting state, the furnace body is inclined, and the molten material is discharged through the tapping outlet path. In the second aspect, dust collection is performed in the second dust collection state. In this dust collecting duct mechanism, when the attitude of the furnace body accompanying the tapping is inclined, the tapping dust collection opening is the furnace body,
It is inclined so as to be integral with the tapping path, and the tapping dust collection opening is oriented toward the ladle. Therefore, gas generated with the tapping can be collected through the tapping dust collection opening. result,
It is not necessary to separately move and operate the dust collecting mechanism as in the related art, and sufficient collection can be performed with a simple configuration and operation. Here, the dust collection duct mechanism includes a substantially annular first hollow ring hood portion formed above the upper end surface of the furnace body so as to surround the furnace body opening along the upper end surface, The first hollow ring hood portion has an exhaust gas suction port that opens to the furnace body opening side, and one end of the first hollow ring hood portion extends to the tip thereof along the hot water outlet route. With a discharge part, by providing the hot water dust collection opening at the tip of the outlet path extension part, gas generated through the furnace body opening can be collected by the hollow ring hood part, At the time of tapping, the gas generated from the ladle side can be collected through the tapping dust collection opening. Further, the tapping outflow path is formed in a gutter shape open to the upper side, and the tapping outflow extension section is provided at one side of the tapping outflow path, and the tapping collection section is provided at the tip of the tapping path extension section. A second hollow hood portion provided with a dust opening, and provided on the other side of the tapping outlet path with the tapping dust collection opening at a distal end portion, and a dust collecting operation mainly including the first hollow ring hood portion. And a switching mechanism for switching between a first dust collection state for performing the dust collection operation and a second dust collection state for performing the dust collection operation mainly using the tapping dust collection opening, wherein the material to be melted is melted in the furnace body and the furnace In the melting position in which the body is maintained in the vertical position, dust is collected in the first dust collecting state, the furnace body is inclined, and the molten material is discharged through the tapping outlet path. In the posture, by collecting dust in the second dust collecting state, In the melting position, gas is mainly collected from the opening of the furnace body by the first ring hood portion, and in the tapping position, the first hollow ring hood portion and the second hollow hood portion are operated together to supply hot water. In a state where the dust collecting ability from the dust collecting opening is high, it is possible to satisfactorily collect the gas from the ladle side. As described in claim 2, in the dust collection duct mechanism according to claim 1, the outlet path extension portion includes a tap hole opening that opens to the tapping outlet path side, and the second hollow hood portion includes the tap hole opening. It is preferable to provide a tap hole opening that opens to the tapping outlet path side. With this configuration, the gas generated from the tapping outlet path can be favorably collected in the first hollow ring hood section and the second hollow hood section via the tapping path opening.

[0005]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of an electric furnace 2 equipped with the dust collection duct mechanism 1 of the present application. Electric furnace 2
Is provided with a furnace body 4 which is in a normal vertical posture and is formed in a cylindrical crucible with a bottom provided with a furnace body opening 3 at an upper part, as shown in the plan view of FIG. And a tapping outlet 5 for tapping the molten material in a molten state.
Naturally, the tapping path 5 is formed in a gutter shape open to the upper side, the base end of which is connected to the furnace body opening 3, and the tip end portion thereof is formed as a tapping port 6. Further, the furnace is configured to switch between a vertical position for melting the material to be melted and an inclined position for pouring the material to be melted toward the ladle 7 side.
The posture can be freely changed around a predetermined swing axis A.

As shown in the front view of FIG. 3, the furnace body 4 is formed in a substantially annular shape above the upper end face 4a of the furnace body 4 so as to surround the furnace body opening 3 along the upper end face 4a. A first hollow ring hood portion 8 which forms a part of the dust collection duct mechanism 1 of the present application is provided, and as shown in FIG.
The hollow ring hood portion 8 is provided with an exhaust gas suction port 9 that opens to the furnace body opening side. Further, as shown in FIG.
A furnace lid 10 is provided so as to cover a part of the first hollow ring hood portion 8 and a portion immediately above the furnace body opening 3. The furnace lid 10 is provided with an opening / closing mechanism 11, and switches between a closed position covering the furnace body opening 3 as shown in FIGS. 3 and 4 and an open position moved laterally from the furnace body opening 3. , Are configured to be switchable.

The above is an outline of the equipment provided with the dust collection duct mechanism 1 of the present application.
The description itself will be given. 2 is a plan view of the dust collection duct mechanism 1, FIG. 3 is a front view of the dust collection duct mechanism 1, and FIG. 4 is a side view of the dust collection duct mechanism 1 in an inclined posture. As described above, the dust collection duct mechanism 1 is used by being integrally attached to a furnace body 4 and a tapping outlet 5 around a predetermined swing axis A so as to be capable of changing its attitude. The dust collecting duct mechanism 1 is characterized in that, similarly to the conventional hollow ring hood type dust collecting duct, a structure is provided in which the gas containing dust rising from the furnace body opening 3 is sucked on the upper side of the furnace body opening 3. It is characterized by having a structure mainly for sucking gas rising from the ladle 7 at the time of tapping. Therefore, the first hollow ring hood portion 8 is provided for the former purpose, and the hot water dust collecting opening 13 and the hot water passage opening 5 are provided for the latter purpose. Here, the tapping dust collection opening 13 is an opening of a duct that opens in the discharge direction of the molten material at the time of tapping operation near the tip of the tapping outlet 14, and has a gutter-shaped tapping opening 6. A pair is provided at the left and right end portions. Further, a plurality of tapping openings 14 are provided along the tapping outflow path 5.

Hereinafter, the configuration of the dust collection duct mechanism 1 will be described in more detail. This has a substantially annular first hollow ring hood portion 8 formed above the upper end surface 4a of the furnace body 4 so as to surround the furnace body opening 3 along the upper end surface 4a. An exhaust gas suction port 9 that opens to the furnace body opening 3 side is provided in the ring hood portion 8. The opening direction of the exhaust gas suction port 9 is along the direction of the suction flow path around the furnace body opening 3 as shown in FIG. One end of the first hollow ring hood portion 8 extends to the tip thereof along the tapping outflow path 5, and this portion is configured as an outflow path extension section 15. A plurality of tapping openings 14 are provided on the tapping outlet 5 side, and the leading end of the tapping path extension 15 is connected to one of the tapping dust collection openings 13 described above (in the tapping port 6 in FIG. 3). On the left). The other side of the tapping outlet 5 (FIG. 3)
Is located on the right side of the tap hole 6).
3 has a second hollow hood portion 16 having a distal end portion 3. The second hollow hood portion 16 also has a plurality of tap holes 14 on the tap side for tapping.

By adopting such a configuration, in the dust collecting duct mechanism 1, the tapping dust collection opening 13a located on the left side of the tapping port 6, the lead-out path extension portion 15, the first hollow ring A first suction flow path a surrounding the opening of the furnace body connected to the induction blower 17 side via the hood section 8, a hot water collecting dust opening 13b located on the right side of the hot water port 6, a second hollow hood section; 16 and a second suction flow path b connected to the induction blower 17 side. These flow paths a and b are connected to the induction blower 17 via the common suction path c provided near the swing axis A described above on the lower side. By the way, between the first hollow ring hood portion 8 and the second hollow hood portion 16,
A partition plate 18 is provided, and a damper 19 that can be freely opened and closed is provided between the second hollow hood portion 16 and the common suction path c. Therefore, in a state where the induction blower 17 is operated, there are two states, that is, a state in which the first suction flow path a is mainly operated and a state in which the first suction flow path a and the second suction flow path b are caused to fall together. The state can be switched. That is, a first dust collection state in which a dust collection operation is performed by the first suction channel a mainly including the first hollow ring hood portion 8, and the first suction channel a and the second hollow hood portion 16 are mainly used. A switching mechanism (actually, the adjusting mechanism 20 of the damper 19 shown in FIG. 3) for switching to the second dust collection state in which the dust collection operation is performed by both the second suction channel b and the second suction channel b is provided. As shown in FIG. 2, the furnace body 4 is provided with a posture detecting mechanism 21 for detecting the posture of the furnace body 4, and in conjunction with the posture detecting mechanism 21, a predetermined damper opening is performed based on the detection result. A damper opening controller 22 for designating the degree to the damper adjusting mechanism 20 is provided.

Hereinafter, the operation of the dust collection duct mechanism 1 and the operation state accompanied by the switching of the flow paths will be described. 1 Normal operation state in which the material to be melted is melted In this operation state, the furnace body 4 is maintained in the vertical posture, and the operation is performed with the furnace lid 10 closed. In this case, since the gas generated from the furnace rises from the furnace body opening 3, it may be sucked from the exhaust gas suction port 9 provided in the first hollow ring hood 8. Therefore, in this operation state, dust is collected in the first dust collection state by using the above-described first suction channel a. 2. State at the time of tapping operation In this operating state, the furnace body 4 is maintained in the inclined posture, and the molten material in the molten state is discharged from the tapping port 6 to the ladle 7 side. In this case, since a large amount of gas rises from the ladle 7, the gas may be sucked from the hot water collecting dust opening 13. Therefore, in this operation state, dust collection is performed in the second dust collection state by using both the first suction channel a and the second suction channel b described above.

[0011]

Therefore, in the dust collecting duct mechanism of the present invention, when the hot water is discharged, the dust is generated from the hot water collecting opening provided in the vicinity of the hot water outlet integrally with the furnace body without using a separately provided dust collecting mechanism. Gas can be removed by suction. Furthermore, by providing this tapping dust collecting opening at the end of the flow path of the conventional ring hood, the gas rising from the furnace body opening during the melting operation and the gas rising from the ladle at the time of tapping while utilizing the conventional structure. Can be favorably removed by suction with a compact configuration.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an electric furnace equipped with a dust collection duct mechanism of the present application.

FIG. 2 is a plan view of the dust collection duct mechanism of the present application.

FIG. 3 is a front view of the dust collection duct mechanism of the present application.

FIG. 4 is a side view of the dust collection duct mechanism of the present invention in an inclined posture.

[Explanation of symbols]

 Reference Signs List 3 Furnace body opening 4 Furnace body 4a Upper end 8 First hollow ring hood 13 Hot water dust collection opening 14 Hot water path opening 15 Outgoing path extension 16 Second hollow hood

Claims (2)

(57) [Claims] 1. A furnace body (4) having a furnace body opening (3) at an upper part and into which a material to be melted is charged and melted, and the furnace for tapping the material to be melted in a molten state. It is connected to the body opening (3), and an upper side to the tapping outlet passage formed in trough open (5) a dust collecting duct system provided in the flue-gas equipment of the furnace having a freely attitude change The furnace body (4) is provided integrally with the hot water outlet path (5), and is provided along an upper end surface (4a) above an upper end surface (4a) of the furnace body (4). A first hollow ring hood portion (8) formed so as to surround the furnace body opening (3), and the first hollow ring hood portion (8) is opened toward the furnace body opening (3); Exhaust gas suction port (9), and one end of the first hollow ring hood (8) is connected to the hot water outlet path ( ) Is provided along the one side of the lead-out path extension part (15) extending to the tip thereof, and the tapping dust collection opening (13) is provided at the tip of the lead-out path extension part (15); A second hollow hood portion (1) provided with the tapping dust collection opening (13) at the distal end portion on the other side of the tapping outlet path (5).
6), a first dust collection state in which a dust collection operation is mainly performed by the first hollow ring hood portion (8), and the hot water collection opening (1).
3) a switching mechanism for switching to a second dust collection state for performing a dust collection operation mainly based on 3), wherein the object to be melted is melted in the furnace body (4) and the furnace body is maintained in a vertical posture. In the melting position, the first
In the dust collecting state, the furnace body (4) is inclined, and the molten material is discharged through the tapping outlet path (5). Dust collection duct mechanism that collects dust. 2. A tap hole opening (14) that opens to the tapping outlet path side in the tapping path extension section (15), and an opening to the tapping outlet path side in the second hollow hood section (16). 2. The dust collecting duct mechanism according to claim 1, further comprising a tap hole opening.