JP2001221424A - Melting furnace and tapping device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To tap a required amount of molten metal from the lower layer of a melt in a furnace without discharging the upper layer (molten slag) of the melt and discharge all of the melt from the furnace with a simple structure. SOLUTION: A furnace 2 has a first tapping opening 24 other than a slag discharging opening 22 for the melt provided at an outer side with respect to the inner periphery of the furnace 2 and at a position higher than the opening 22. A second tapping opening 28 is located at an arbitrary position of a furnace bottom 21. The openings 24, 28 are blocked by blocking members 27, 29, respectively, so as to be opened and closed. By jointly using a tilting mechanism 10 of the furnace 2, the required amount of the molten metal is discharged through the opening 24, and all of the melt is discharged through the opening 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a melting furnace used for melting incinerated ash (main incinerated ash, fly ash) and metal, and a tapping device therefor.

[0002]

2. Description of the Related Art In recent years, ash melting furnaces for melting and processing incinerated ash have attracted attention in order to further reduce the volume and detoxification of incinerated ash generated by incineration of municipal waste and industrial waste.
One of them is an ash melting furnace using electricity as a heat source. The electric melting method includes an arc method, a plasma method, and the like. Each method has a different heat source heating method, but heat melting is performed by expecting a frying pan effect by metal at the furnace bottom. According to these ash melting furnaces, the incinerated ash heated in the furnace melts out after a certain period of time, and heavy metals (iron, copper, etc.) mixed in the incinerated ash precipitate in the lower layer and are melted. Light ash becomes slag and floats on the upper layer. That is, the molten metal is separated into a layer of molten metal below and a layer of molten slag above. When new incineration ash is supplied there, it is similarly heated and is separated into molten metal and molten slag. In this way, the molten metal surface gradually rises, and when the molten metal surface rises to the slag outlet, the molten slag in the upper layer of the molten metal is discharged out of the furnace. The discharged molten slag is solidified by water cooling or air cooling. In this way, the incinerated ash becomes slag by melting, and the volume is reduced to about one third to one third. The molten slag can be reused for construction materials and the like because the elution of heavy metals is prevented.

[0003] In such an ash melting furnace, the molten metal is indispensable for stabilizing the plasma arc. However, if the molten metal is excessively accumulated and the amount of the molten slag becomes too small, the melting of the incinerated ash is hindered. Cause. When the molten metal layer in the furnace rises to the slag outlet, it is discharged outside the furnace and mixed with the molten slag. For this reason, it is necessary to extract a required amount of molten metal from the molten metal. Conventionally, a tilting device is provided in an ash melting furnace, and after the melting operation is stopped, the furnace body is tilted to overflow a molten metal from a slag outlet and discharge a required amount of molten metal.

[0004]

However, the conventional method of discharging molten metal in a ash melting furnace has the following problems. (1) Since the molten metal flows out of the slag outlet of the molten slag due to the tilting of the furnace body, it is necessary to first extract all the molten slag before discharging the molten metal. Needs a lot of time. Further, in the ash melting operation, it is necessary to keep a constant amount of molten slag floating on the molten metal layer, and it is originally not preferable to extract all the molten slag. (2) According to (1), the incineration ash cannot be melted while the molten metal is being discharged, so that it is necessary to stop the operation of the ash melting furnace for a long time. During the operation of the ash melting furnace, the incinerated ash supplied into the furnace is gradually melted into the molten metal.If the furnace body is tilted during this operation, the newly supplied incinerated ash is Since the molten metal is discharged from the slag port together with the molten metal flowing in the tilting direction of the furnace body before floating on the molten metal, it is possible from this point to perform tapping by furnace body tilting during furnace operation. Can not. (3) Since the molten metal flows out of the molten slag discharge port due to the tilting of the furnace body, the molten metal is discharged to the granulated slag layer, and depending on the discharge speed, steam explosion may occur. You need to be careful. (4) In addition, maintenance of the ash melting furnace such as inspection and repair of refractories used in the furnace bottom is performed periodically every few months. At this time, it is necessary to discharge all molten metal. In this case, since the molten metal flows out of the slag port by tilting the furnace body, the furnace body must be greatly tilted to 20 to 30 degrees in order to discharge the entire amount of the molten metal. However, a dust collecting duct, an ash charging conveyor, a slag discharge cover, and the like are connected to the furnace body, and in order to largely tilt the furnace body, these peripheral devices are separated from the furnace body or connected flexibly. Therefore, the structure of the entire equipment is complicated, the work is not easy, and much time is required. The present invention solves such a conventional problem, and in this type of melting furnace and its tapping apparatus, extracting a required amount of molten metal from the lower layer without discharging the upper layer of the molten metal, and discharging the molten metal to the furnace. An object of the present invention is to perform the operation even during operation, to ensure sufficient safety in operation, and to discharge the entire amount of molten metal with a slight tilt of the furnace body.

[0005]

In order to achieve the above object, in a melting furnace of the present invention, a molten metal outlet formed at a predetermined height from the furnace bottom in a furnace body, and an inside of the furnace body. A first tap hole formed at a position outside the inner periphery of the furnace and higher than the slag port of the molten metal, a second tap hole formed at an arbitrary position on the furnace bottom, and a first tap hole. A first and a second closing member for opening and closing each of the second tap holes, and when the required amount of molten metal is discharged, the furnace body is tilted using a tilting mechanism to discharge the molten metal to the first discharging port. After moving over the spout, by opening the spout, the molten metal is extracted from the lower layer through the first spout, and when the entire amount of the molten metal is discharged, the second spout is opened. The molten metal is extracted through the second tap hole, and the furnace body is tilted as necessary to guide the molten metal to the second tap port. It is. In the tapping device for a melting furnace according to the present invention, a first tapping hole formed inside the furnace body with respect to an inner periphery thereof and at a position higher than a slag level of the molten metal; A second tap hole formed at an arbitrary position on the bottom, first and second closing members for opening and closing the first and second tap ports, and a tilting mechanism for tilting the furnace body are provided. When the required amount of molten metal is discharged, the furnace body is tilted by the tilting mechanism to move the molten metal onto the first tap hole,
When the tap is opened, the molten metal is extracted from the lower layer through the first tap and when the entire amount of the molten metal is discharged, the molten metal is extracted through the second tap by opening the second tap. The furnace body is tilted as required to guide the molten metal to the second tap hole. In this way, the first melt outlet allows the required amount of molten metal to be extracted from the lower layer without discharging the upper layer of the molten metal, and that the molten metal can be discharged even during operation of the furnace. In addition, safety in operation can be sufficiently ensured. Further, the second molten metal outlet allows the entire molten metal to be discharged with a slight tilt of the furnace body.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A melting furnace according to a first aspect of the present invention has a slag port for molten metal formed at a predetermined height from the furnace bottom in a furnace body, and a smelt opening inside the furnace body at an inner periphery thereof. A first tapping hole formed on the outside and at a position higher than the slag port of the molten metal,
A second tap hole formed at an arbitrary position on the furnace bottom;
It comprises first and second closing members for closing and opening each second tap hole. The tapping device for a melting furnace according to claim 2 of the present invention has a first tapping hole formed inside the furnace body with respect to an inner periphery thereof and at a position higher than a slag level of the molten metal. And a second tap hole formed at an arbitrary position on the furnace bottom, first and second closing members for opening and closing the first and second tap ports, and a tilting mechanism for tilting the furnace body. It is provided with. When the required amount of molten metal is discharged from each of the above configurations, the furnace body is tilted in a direction to lower the first tap hole by the tilting mechanism, and the molten metal in the furnace is moved onto the first tap port. By opening the first tap, the molten metal is discharged from the lower layer through the first tap. When the required amount of molten metal has been discharged, the furnace body is tilted and returned, and the tapping is stopped. In the case of melting incineration ash, only a required amount of molten metal in the lower layer of the molten metal can be discharged, and the molten slag can be retained in the upper layer. As a result, the molten slag can always float on the layer of molten metal, and during the operation of the melting furnace, the incinerated ash newly supplied into the furnace does not float on the molten metal and melt in the molten metal. Even if the furnace body is tilted and the molten metal is discharged, only the molten metal in the lower layer of the molten metal is discharged from the molten metal outlet, so that the incinerated ash newly supplied into the furnace is reliably melted in the molten metal without being discharged from the molten metal hole. be able to. Therefore, even during operation of the melting furnace, the furnace body is tilted,
Discharge of molten metal can be performed. In addition, by providing a first tap hole separately from the tap port of the molten metal and discharging the upper layer and the lower layer of the molten metal through different discharge paths, the molten metal can be discharged safely and efficiently. Further, when discharging the entire amount of the molten metal, the molten metal is extracted through the second molten metal outlet by opening the second molten metal outlet. At this time, if necessary, the furnace body is slightly tilted to guide the molten metal in the furnace to the second tap hole, so that the molten metal can be smoothly discharged.
According to a third aspect of the present invention, there is provided a tapping device for a melting furnace according to the second aspect, wherein the first tapping port is arbitrarily provided in a range of 90 to 180 degrees from the tapping port around the furnace body. It is. According to the above configuration, the tilting operation of the furnace body can be performed without interfering with peripheral devices of the melting furnace. According to a fourth aspect of the present invention, there is provided a tapping device for a melting furnace according to the second or third aspect, wherein the first tapping port is formed in a substantially cylindrical shape, and the first closing member is provided with the first tapping member. It has a refractory that can be loaded inside the gate and an opening / closing lid that can open and close the furnace opening of the first tap. According to a fifth aspect of the present invention, there is provided a tapping device for a melting furnace according to the fourth aspect, wherein a refractory material having fluidity is used for the refractory. From each of the above configurations, it is possible to reliably close the first tap hole and hold the molten metal in the furnace. A tapping device for a melting furnace according to claim 6 of the present invention, in each of the constitutions according to claim 4 or 5, is disposed so as to be able to move up and down on a first tapping outlet of a furnace body, and a first tapping inside the furnace. And a connecting body that can be connected to the first tap hole and the supply source of the fluid and / or refractory. With the above configuration, it is possible to easily clean the inside of the tap hole and load the refractory. A tapping device for a melting furnace according to claim 7 of the present invention, in any one of claims 2 to 6, is arranged so as to be able to move up and down on a first tap hole of a furnace body, and has a first inside of the furnace. It has a closing body capable of closing the tap hole. With the above configuration, during the tapping from the first tap, the first tap is closed by the closing body, so that the discharge of the molten metal can be immediately stopped, and the discharge amount of the molten metal is adjusted more accurately. be able to. In the tapping device for a melting furnace according to claim 8 of the present invention, in the constitution according to any one of claims 2 to 7, the second tap hole is formed in a substantially cylindrical shape.
Is provided with a refractory which can be filled in the second tap hole. According to a ninth aspect of the present invention, there is provided a tapping device for a melting furnace according to the eighth aspect, wherein a refractory material having a solidifying property is used for the refractory. The tapping device for a melting furnace according to claim 10 of the present invention is the same as that of claims 2 to 9.
In any one of the above configurations, the second tap hole is pierced by the piercing means. From the above configurations, it is possible to reliably close the second tap hole and hold the molten metal in the furnace. According to an eleventh aspect of the present invention, in the melting furnace tapping device according to any one of the second to tenth aspects, the second tap is formed so as to be able to communicate with the first tap. With the above configuration, the molten metal extracted from the furnace through the first and second tap holes can be discharged at a common position outside the furnace, and the molten metal can be efficiently discharged.
According to a twelfth aspect of the present invention, in the melting furnace tapping device according to any one of the second to eleventh aspects, the second tapping hole has a furnace opening formed on the first tapping side, and A furnace communication part which is provided in a cross shape with respect to the tap hole of the furnace and which can communicate the inside of the furnace with the first tap port, and a furnace which can communicate the first tap port and the outside of the furnace on an extension thereof. An external communication unit is provided.
According to the above configuration, when the second tap hole is opened, the second tap hole can be effectively penetrated by inserting the drilling means from the outside-furnace communication section to the inside-furnace communication section. In addition, at the time of tapping, the molten metal extracted from the inside of the furnace through the second tap is discharged through the first tap outside the furnace, and can be discharged at a common position with the first tap. Can be efficiently discharged. According to a thirteenth aspect of the present invention, in the melting furnace tapping device according to the twelfth aspect, the inside of the furnace and the outside of the furnace of the second tap are connected to the peripheral surface of the first tap. Two communication ports are provided to face each other, and the peripheral surface of the first tap hole is partially enlarged so that the communication ports can be separated by a predetermined distance. According to the above configuration, when the molten metal extracted from the inside of the furnace through the second outlet is discharged out of the furnace through the first outlet, the molten metal discharged from the communication port of the in-furnace communication portion is communicated outside the furnace. It can be reliably prevented from flowing into the section. The tapping device of the melting furnace according to claim 14 of the present invention,
In any one of claims 2 to 13, the second tap hole has an in-furnace opening provided on the first tap port side, and the out-of-furnace opening is close to the out-of-furnace opening of the first tap port. It is formed by With the above configuration, the molten metal extracted from the inside of the furnace through the first and second tap holes can be discharged at a common position outside the furnace, and the molten metal can be efficiently discharged. According to a fifteenth aspect of the present invention, in the melting furnace tapping device according to any one of the second to fourteenth aspects, the tilting mechanism includes a support device that tiltably supports the furnace body and a drive that tilts the furnace body. And a device. From the above configuration, the furnace body can be tilted at any angle.

An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a first embodiment of the present invention. FIGS. 1 and 2 are sectional views showing the configuration of an ash melting furnace and a tapping device therefor. FIG. 3 is a partially enlarged cross section of the ash melting furnace. FIG. (Embodiment 1) Here, the ash melting furnace 1 is configured as a plasma type electric furnace, and the tapping device 11 includes first and second tap holes 24, 28 provided in the furnace body 2 of the ash melting furnace 1. And first and second closing members 27 and 29 for opening and closing the tap holes 24 and 28, respectively, and a tilting mechanism 10 for tilting the furnace body 2.

In FIG. 1 and FIG. 2, an ash melting furnace 1 includes a furnace body 2 provided with an electrode (negative electrode side) 3 and an electrode (positive electrode side) 4.
And a ceiling wall 5 on which the wall is suspended. Here, the furnace body 2 has a furnace bottom 2 on its peripheral wall (a position corresponding to the front part of the ash melting furnace 1).
A molten metal outlet 22 is provided at a predetermined height from 1. In the ash melting furnace 1, the molten slag 61 in the upper layer of the molten metal 6 is discharged by continuous dropping by raising the surface of the molten metal while heating and melting the incinerated ash and causing the molten metal to overflow from the slag port 22.

Inside the furnace body 2, a step 23 projects outward from the inner periphery of the furnace body 2 at the rear portion facing the slag port 22 for molten metal. This step portion 23 is set at a position where the upper surface is slightly higher than the slag port 22 of the molten metal,
The lower surface is flush with the bottom surface 210 outside the furnace body 2. A first tap hole 24 is provided in the step portion 23 in the vertical direction. The tap hole 24 is formed in a substantially cylindrical shape from a refractory material, and is formed in a tapered shape at the inner periphery of the end portion on the furnace opening 241 side by expanding the opening diameter. Further, in relation to a second tap 28 described later, a lower portion (lower half) of the first tap 24 serves as a common port 248 with the second tap 28 from an upper portion (upper half). Is also formed with an enlarged diameter. In the inner peripheral surface of the furnace body 2, the edge 25 corresponding to the step 23 is set at a lower level than the step 23, and a gentle slope between the edge 25 and the first tap hole 24. 26 are formed. The inclined surface 26 serves as a guide surface for smoothly moving the molten metal 6 to the first tap hole 24 when the molten metal 6 is discharged. Also, this step 2
3 and the tap hole 24 can be arbitrarily provided in the range of 90 degrees to 180 degrees from the slag port 22 around the furnace body 2, and a dust collector, an incineration ash supply device or the like provided around the ash melting furnace 1. A position that does not interfere with various devices, such as an attached duct, is appropriately selected. Thus, the first tap hole 24 is provided inside the furnace body 2 with respect to the inner periphery thereof and at a position slightly higher than the slag port 22 of the molten metal.

[0010] As shown in FIG.
It is closed by a first closing member 27 so that it can be opened and closed.
Here, the first closing member 27 includes a refractory 271 and an opening / closing lid 272. Sand is used for the refractory 271 as a refractory material having fluidity, and is loaded into the first tap hole 24. The opening / closing lid 272 is located outside the furnace
The tap hole 24 is disposed so as to be openable and closable with respect to the outside opening 242 of the tap hole 24 and is driven by an actuator (not shown).
Here, a hydraulic cylinder or the like is used for the actuator, and the opening / closing lid 27 is provided outside the furnace opening 242 of the first tap hole 24.
Is slidably mounted between a closed position for closing the opening and an open position for opening the outside furnace opening 242.

As shown in FIG. 3, an upper wall 50 is provided at the rear of the top wall 5 to cover the step 23 of the furnace body 2 at a low position.
The upper wall 50 is provided with a through hole 51 at a position immediately above the first tap hole 24. The coupler 7 is supported by the elevating device 71 in the through hole 51 and is arranged so as to be able to ascend and descend. This coupler 7 is made of a first tap hole 24 made of a refractory material.
Is formed in a cylindrical shape having a length and an outer diameter that can be connected to the first tap hole 24, and is normally waited above the first tap port 24 by ascending, and connected to the first tap port 24 by descending. It is used for supplying fluids and refractories. In addition,
The upper part of the coupler 7 has a funnel-shaped wide opening 70.
As shown, the supply port 80 of the fluid supply device 8 is inserted into the coupler 7 from the upper opening 70, and compressed air or nitrogen gas supplied from the fluid supply device 8 passes through the coupler 7 to the first outlet. It is blown into the gate 24. Further, the supply port 90 of the refractory supply device 9 is disposed on the upper opening 70 of the coupler 7, and a certain amount of sand is dropped from the sand storage tank of the refractory supply device 9. Outlet 24
Packed in. The coupler 7 is connected to a first tap hole 24.
Of the first tap hole 24 is pressed against the opening 241 in the furnace.
The first tap hole 24 can also be used as a closing body that can be closed.

1 and 2, a second tap hole 28 is provided in the furnace body 2 at an arbitrary position on the furnace bottom 21 in a substantially cylindrical shape.
It is provided obliquely downward. Here, the second tap hole 28 has an in-furnace opening 281 formed at the edge of the furnace bottom 21 adjacent to the first tap port 24 so that the first tap port 24 can communicate with the first tap port 24. , A furnace communication part 282 that can communicate the whole inside of the furnace with the first tap hole 24 (common port 248), and the first tap port 24 ( The common port 248) and the outside-of-furnace communication portion 283 that can communicate with the outside of the furnace. In this manner, the furnace bottom 21 has an opening 281 in the furnace, the two communicating ports 243 and 244 opposed to the peripheral surface of the first tap hole 24 (common port 248), and the furnace 210 has a bottom surface 210 outside the furnace body 2. Outer openings 284 are provided, respectively. As described above, since the diameter of the common port 248 at the lower part of the first tap hole 24 is enlarged, the dimensions are set so that the two communication ports 243 and 244 are separated by a predetermined distance. Thereby, the molten metal in the furnace bottom 21 is
When the molten metal is discharged to the outlet 28, the molten metal flowing out of the one communication port 243 through the in-furnace communication section 282 does not flow into the out-of-furnace communication section 283 from the other communication port 244.
The drop is surely dropped to the common port 248 of the first tap hole 24.

The second tap 28 is, as shown in FIG.
It is closed by a second closing member 29 so that it can be opened and closed.
A refractory 291 is used for the second closing member 29.
The refractory 291 is made of an amorphous refractory material having a solidifying property, and is filled in the second tap hole 28 and solidified. When the tap hole 28 is opened, as shown in FIG.
The tap hole 28 is pierced by hitting and cutting the refractory 291 in 8.

1 and 2, a tilting mechanism 1 for a furnace 2
0 is a supporting device 110 for tiltably supporting the furnace body 2;
And a drive device 120 for tilting the furnace body 2.
Here, the support device 110 includes a rotating shaft 111 and a pair of bearings 112 that pivotally support the rotating shaft 111. The center of tilt of the furnace body 2 is set at a predetermined position on the bottom surface 210 of the furnace body 2 on the first tap hole 24 side, the rotating shaft 111 is fixed to the furnace body 2 side, and a pair of bearings 112 It is installed on both sides of the furnace body 2 so as to support 111. The drive unit 120 includes a pair of hydraulic cylinders 121. These hydraulic cylinders 121 are installed on the opposite side of the supporting device 110, that is, below the furnace outlet 22 side of the furnace body 2, and their working ends are connected to predetermined positions on the bottom surface 210 of the furnace body 2. By such a tilting mechanism 10, the furnace body 2 is normally held at a horizontal position where the level of the molten metal 6 can be held horizontally, and when the molten metal is discharged, the furnace body 2 is operated by the hydraulic cylinder 121.
Is pushed upward, and the furnace body 2 is brought into a pair of bearings 11.
With the rotating shaft 111 supported by the fulcrum 2 as a fulcrum, it is tilted in a direction in which the level of the first tap hole 24 is lowered with respect to the level of the tap hole 22. In addition, the tilting mechanism 10 can be changed to other known means, for example, using a rocker rail that swingably supports the furnace body, instead of a rotating shaft or a bearing as a supporting device,
The furnace body may be tilted by a tilt cylinder.

In FIG. 1, reference numeral 13 denotes an incineration ash supply device, which is installed near the ash melting furnace 1 and has a supply port 1 thereof.
30 is connected to the top wall 5 or the peripheral wall 20 of the furnace body 2.
By this incineration ash supply device 13, a certain amount of incineration ash is
It can be continuously put in.

Next, the tapping (discharging of molten metal) of the ash melting furnace 1 will be described with reference to FIGS. 1 to 3 and FIGS. 4 to 10. Normally, as shown in FIG. 1, the furnace body 2 is supported by a tilting mechanism 10 and is fixed at a horizontal position at which the surface of the molten metal 6 can be held horizontally. As shown in FIG. 4, the first tap 24 is previously closed by a refractory (sand) 271 having fluidity and an opening / closing lid 272, and the second tap 28 has a solidifying property in advance. It is closed by the refractory 291. In FIG. 1, by operating the ash melting furnace 1, the incinerated ash charged into the furnace body 2 is melted out by heating in the furnace, heavy metals become molten metal 62 and sink in the lower layer, and light ash is molten slag. It is 61 and floats in the upper layer. A new incineration ash is charged there, and is similarly heated and melted, and is separated into a molten metal 62 and a molten slag 61. Thus, the surface of the molten metal 6 gradually rises and rises to the slag port 22. Further, incinerated ash is continuously charged, and the same amount of molten metal 6, that is, the upper layer of molten slag 61 is discharged from the slag port 22 by continuous dropping. At this time, since the step portion 23 provided in the furnace body 2 is located at a position higher than the level of the slag port 22, the surface of the molten metal 6 does not rise to the first tap port 24. On the other hand, with the continuous melting of the incineration ash, the molten metal 62 layer increases in the furnace body 2 and the level increases. This molten metal 6
If the molten slag 61 layer is extremely reduced due to the rise of the two layers, the melting of the incinerated ash is hindered. Therefore, when the molten metal 62 layer has risen to a predetermined position, the tilting mechanism 10
Is started, the furnace body 2 is tilted, and the required amount of molten metal 62 is discharged from the first tap hole 24.

When the required amount of the molten metal 62 is discharged, as shown in FIG.
As a result, the furnace body 2 is tilted about the rotation shaft 111 as a fulcrum in a direction in which the first tap hole 24 is lowered, and the molten metal 6 is guided by the inclined surface 26 and flows on the step portion 23, and Is moved onto the tap 24 of the hot spring. The furnace body 2 is stopped at a predetermined tilt angle.

The molten metal 6 moved between the furnace bottom 21 and the step portion 23 of the furnace body 2 is separated vertically as shown in FIG.
When the layer of the molten slag 61 and the layer of the molten metal 62 are formed, as shown in FIG. 6, the opening / closing lid 272 outside the first tap hole 24 is opened by the actuator, and the furnace opening 242 is opened. Thus, the sand 271 loaded in the first tap hole 24 flows out of the tap hole 24,
Subsequently, the molten metal 6 is discharged through the first opening 24 which is fully opened. At this time, the molten metal 6 flows from the first tap hole 24.
The lower molten metal 62 is discharged.

When a predetermined amount of the molten metal 62 has been discharged, the tilting mechanism 10 is activated, and the furnace body 2 is tilted back to the original horizontal position. In this case, the furnace body 2 is rapidly driven toward the horizontal position. Due to this tilt, the molten metal 6 on the step portion 23 flows down toward the furnace bottom 21, and
A small amount of the molten metal 6 is discharged from the tap hole 24 of the molten metal. At the horizontal position of the furnace body 2, tap water (molten metal 6
2) is stopped, and the surface of the molten metal 6 is set to the first tap hole 2.
4 (furnace opening 241), and from the slag outlet 22 level to a position lowered by the amount of the discharged molten metal 62 (see FIG. 8).

The discharge stop of the molten metal 62 can be changed as follows using the coupler 7. FIG.
After the predetermined amount of the molten metal 62 has been discharged, the connecting device 7 waiting above the first tap hole 24 is lowered by the lifting / lowering device 71, and as shown in FIG. The first metal tap 24 is pressed against and connected to the first tap hole 24, and the discharge of the molten metal 6 (molten metal 62) is stopped by closing the furnace opening 241. When the first tap hole 24 is closed from the inside of the furnace using the coupler 7, tapping can be stopped immediately, and the discharge amount of the molten metal 62 can be adjusted more accurately. After the tapping is stopped in this manner, the furnace body 2 is tilted and returned to the original horizontal position by the tilting mechanism 10 in the same manner.

Following the stop of the tapping, as shown in FIG.
The coupler 7 waiting above the first tap hole 24 is lowered by the elevating device 71, and the lower opening thereof is pressed against the first tap port 24 to be connected thereto. In addition, when the tapping is stopped by the coupler 7, the operation here has already been completed because the coupler 7 is already connected to the first tap hole 24. Subsequently, compressed air or nitrogen gas G is supplied from the fluid supply device 8 having the supply port 80 inserted into the coupler 7, and the compressed air or nitrogen gas G is blown into the first tap hole 24 through the coupler 7. It is. Thereby, the first
The residue such as the sand 271 and the molten metal 62 attached to the inner surface of the tap hole 24 is removed, and the inside of the first tap hole 24 is cleaned.

Subsequently, as shown in FIG.
Is closed by the actuator, and the outside opening 242 of the first tap hole 24 is closed, the upper opening 7 of the coupler 7 is closed.
A predetermined amount of sand 271 is weighed and supplied from the refractory supply device 9 in which the supply port 90 is disposed at 0, and the sand 271 is loaded into the first tap hole 24 through the coupler 7. In addition, sand 27
When 1 is packed in the first tap hole 24, as shown in FIG. 10, the coupler 7 is moved up by the lifting / lowering device 71 and again waits above the first tap port 24.

In this type of ash melting furnace, maintenance is periodically performed every few months, and inspection and repair of refractory used in the furnace bottom are performed. Therefore, the entire amount of the molten metal is discharged from the furnace. In the case of this ash melting furnace 1, as shown in FIG. 1, a refractory 291 in the second tap hole 28 is hit and cut by a perforating means 30 such as a drill, so that the tap hole 28 is penetrated. You. At this time, the perforating means 30 is inserted from the outside communication part 283 of the second tap hole 28,
The outside-furnace communication part 283 is guided by using the outside-furnace communication part 283 as a guide.
Each of the in-furnace communication portions 282 is effectively penetrated. In this way, the second tap 28 is opened, and this tap 28
The molten metal 6 is discharged through. Before or after opening the tap hole 28, the furnace body 2 is tilted slightly (6 to 8 degrees) in the direction of lowering the second tap port 28 as shown in FIG. By guiding the molten metal 6 in the furnace to the furnace opening 281 of the second tap hole 28, the molten metal 6 in the furnace bottom 21 can be discharged smoothly. The molten metal 6 extracted from the second tap 28 in this manner is supplied to the second tap 28
Is discharged to the common port 248 of the first tap hole 24 through the in-furnace communication part 282, and is discharged out of the furnace through the common port 248. Therefore, the molten metal 6 is discharged at a position common to the first tap hole 24. When the second tap hole 28 is opened for maintenance of the ash melting furnace 1,
Since the entire amount of the molten metal 6 is discharged from the furnace, the second tap hole 28 is closed by the filling of the irregular-shaped refractory 291 by the work from the furnace, together with the inspection and repair of each part of the furnace body 2.

According to the first embodiment, the following effects are obtained. First, as shown in FIGS. 1 and 2, a first tap hole 24 is provided separately from a molten metal tap port 22 in the furnace body 2.
To the outside of the inner periphery of the furnace body 2 and the slag port 2 of the molten metal.
2 and the sand 271 and the opening / closing lid 27
2 so that the furnace body 2 can be opened and closed.
To move the molten metal 6 over the first tap hole 24, and then open the tap hole 24 to discharge the molten metal 6, so that only the lower molten metal 62 of the molten metal 6 is discharged. be able to. Further, the molten metal 6 is returned by the tilt return of the furnace body 2.
The tapping is reliably stopped by lowering the molten metal surface from the furnace opening 241 of the first tapping port 24 downward, or by closing the first tapping port 24 in the furnace by the coupler 7. Therefore, the required amount of the molten metal 62 can be easily and reliably discharged without discharging the molten slag 61. Therefore, the molten slag 61 can always float on the layer of the molten metal 62 in the furnace, and the incineration ash can be effectively melted. Also,
During the operation of the ash melting furnace 1, even if the furnace body 2 is tilted and the molten ash newly supplied into the furnace floats on the molten metal 6 and does not melt into the molten metal 6, the first molten metal is discharged. Since only the molten metal 62 in the lower layer of the molten metal 6 is discharged from the pouring gate 24, the incinerated ash newly supplied into the furnace can be surely melted in the molten metal without discharging from the pouring port 24. Therefore, even during the operation of the ash melting furnace 1, the furnace body 2 can be tilted to discharge the molten metal 6. Further, the molten slag 61 is transferred to the slag port 22.
And the molten metal 62 is extracted from the first tap hole 24 and discharged to different paths.
Discharge of the molten metal 6 can be performed safely and efficiently.

In particular, the first tap hole 24 is connected to the slag port 22.
Higher than the first outlet 24
Is not exposed to the high-temperature molten metal 6, deterioration due to heat loss can be prevented, and durability can be improved. Further, the tap hole 24 is connected to the slag port 22 around the furnace body 2 by 90 degrees.
Since it can be arbitrarily provided in the range of degrees to 180 degrees, the tilting operation of the furnace body 2 can be performed without interfering with peripheral devices of the ash melting furnace 1. Further, since the inclined surface 26 is provided between the level of the tap hole 22 on the inner peripheral surface of the furnace body 2 and the level of the first tap hole 24, the first tap port 24 is lowered by the tilting of the furnace body 2. At this time, the molten metal gradually climbs on the inclined surface 26, so that the molten metal 6 can be easily separated into a molten slag 61 layer and a molten metal 62 layer around the first tap hole 24. In addition, the first tap hole 24 is formed in a cylindrical shape, and a refractory (sand) 271 is loaded inside the first tap hole 24 and the outside thereof is closed with the opening / closing lid 272.
4 can be reliably closed, and the molten metal 6 in the furnace can be reliably held until the tapping. In addition, the coupler 7 is disposed on the first tap hole 24 so as to be able to move up and down, and this is connected to the first tap port 24.
So that the first tap hole 24 and the fluid and refractory supply devices 8 and 9 can communicate with each other.
The cleaning of the inside of 4 and the loading of the refractory can be easily performed.

Second, as shown in FIG. 1 and FIG.
1 is further provided with a second tap hole 28, and by opening the same, the molten metal 6 is extracted through the second tap port 28, so that the entire amount of the molten metal 6 can be extracted, and the furnace body 2 is also connected to the second By slightly tilting the tap hole 28 in the direction of lowering it by 6 to 8 degrees, the molten metal 6 in the
The molten metal 6 can be discharged smoothly in a short time by being guided to the outlet 28 of the molten metal. Therefore, when discharging the entire amount of the molten metal 6 at the time of maintenance of the ash melting furnace 1, the furnace body is set at 20 degrees to 3 degrees as in the related art.
Unlike the tilting of the furnace body 2 at a large angle of 0 degrees, the connecting mechanism between the furnace body 2 and these peripheral devices such as the furnace body 2 and a dust collection duct, an ash charging conveyor, a slag discharge cover, and the like is simplified, and the molten metal is melted. 6 can be easily and safely performed in a short time. Further, by discharging the entire amount of the molten metal 6, the irregular shape refractory can be filled in the second tap hole 28 in the operation in the furnace, and this operation can be easily performed.

In particular, since the second tap hole 28 is closed by filling with a refractory 291 having a solidifying property, and the second tap hole 28 is pierced by the perforating means 30 when the second tap hole 28 is opened, the second tap hole 28 is pierced. And the molten metal 6 in the furnace can be reliably held. Also, a second tap hole 28 is formed on the side of the first tap port 24 in the furnace bottom 21 so that the first tap port 24 can communicate with the first tap port 24.
4, a furnace communication portion 282 that allows communication between the inside of the furnace and the first tap hole 24, and an outside of the furnace that allows the first tap hole 24 to communicate with the outside of the furnace on an extension thereof. When the second tap hole 28 is opened at the time of tapping, the perforating means 30 is inserted into the in-furnace communication section 282 by guiding the outside-of-furnace communication section 283. The molten metal 6 can be reliably extracted by effectively penetrating the second tap hole 28. Further, the molten metal 6 extracted from the furnace through the second tap hole 28 is supplied to the first tap port 2.
4 to the outside of the furnace.
Can be discharged at the same position as the above, and the molten metal can be discharged efficiently. Further, two communication ports 243 and 244 are provided on the peripheral surface of the first tap hole 24 so as to face each other by the in-furnace communication section 282 and the out-of-furnace communication section 283 of the second tap port 28. Since the peripheral surface of the first tap hole 24 is partially enlarged so that the communication ports 243 and 244 can be separated by a predetermined distance, the molten metal extracted from the furnace through the second tap port 28. When the molten metal 6 is discharged out of the furnace through the first tap hole 24, it is possible to reliably prevent the molten metal 6 flowing out of the communication port 243 of the in-furnace communication section 282 from flowing into the out-of-furnace communication section 244. .

FIG. 11 is a partial sectional view of the first and second tap holes in the second embodiment of the present invention. (Embodiment 2) In the second embodiment, the configuration of the first and second tap holes is different from that of the first embodiment, and the configuration of other parts is the same as that of the first embodiment. A new description will be added to the second tap hole, and the other portions will be denoted by the same reference numerals as those in the first embodiment, and redundant description thereof will be omitted.

In FIG. 11, inside the furnace body 2, at the rear or side, a stepped portion 31 is provided outwardly with respect to the inner periphery of the furnace body 2.
Is provided. The upper surface of the step portion 31 is set slightly higher than the slag port 22 of the molten metal, and protrudes from the upper side of the rear wall surface or the side wall surface of the furnace body 2 in the outer peripheral direction. A first tap hole 32 is provided on the step portion 31 so as to face in the vertical direction. Compared with the first embodiment, in the case of the stepped portion 31, the length of the first tap hole 32 is reduced because the overall height is reduced. The first tap hole 32 is formed of a refractory material into a substantially cylindrical shape, and the inner diameter of the first tap hole 32 on the side of the furnace opening 321 is slightly enlarged to be tapered. Also, in the case of this tap hole 32,
Since a common port with the second tap hole 33 is not provided, the diameter of the lower part (lower half) is not set large. In this way, the first tap hole 32 is provided inside the furnace body 2 at a position slightly higher than the level of the slag port 22 outside the inner periphery thereof. The tap hole 32 is opened and closed by a refractory 271 having fluidity and an opening / closing lid 272.

The second tap hole 33 has an opening 331 in the furnace.
Is formed on the edge of the furnace bottom 21 on the side of the first tap 32, is provided substantially in a cylindrical shape, and is provided obliquely downward, so that the outside of the furnace is not crossed by the first tap 32. The opening 332 is formed near the furnace outside opening 322 of the first tap hole 32. In this embodiment, the out-of-furnace opening 332 is set at a position corresponding to immediately below the out-of-furnace opening 322 of the first tap hole 32 at the lower portion of the rear wall surface or side wall surface of the furnace body 2. The tap hole 33 is closed by filling with an amorphous refractory 291 having a solidifying property, and the piercing means 3 such as a drill is provided.
0 allows opening and closing.

Also in this case, the furnace body 2 is tilted by the tilting mechanism 10.
To move the molten metal 6 onto the first tap hole 32 and then open the first tap port 32, thereby allowing the molten metal 6 to move.
Can be discharged only from the lower molten metal 62, and the first
The same operation and effect as those of the embodiment can be obtained.

Further, by opening the second tap hole 33, the entire amount of the molten metal 6 can be extracted through the second tap port 33, and the furnace body 2 is moved by 6 degrees in the direction of lowering the second tap port 33. By slightly tilting by 8 to 8 degrees, the molten metal 6 in the furnace bottom 21 can be guided smoothly to the furnace opening 331 of the second tap hole 33 and smoothly drawn out, and the same operation as in the first embodiment can be performed. The effect can be obtained.

Further, the second tap 33 is the first tap 3
However, since the outside openings 332 and 322 of the tap holes 33 and 32 are provided at positions close to each other, they are extracted from the furnace through the first and second tap holes 32 and 33. The discharged molten metal 6 can be discharged at a common position outside the furnace, and the molten metal 6 can be discharged efficiently.

FIGS. 12 to 14 show a third embodiment of the present invention. FIGS. 12 and 13 are sectional views showing the structure of an ash melting furnace and a tapping device therefor. FIG. It is a partial expanded sectional view. (Embodiment 3) In the third embodiment, the configuration of the first closing member for closing the first tap hole is different from that of the first embodiment, and the configuration of other parts is the same as that of the first embodiment. , Here the first
A new description of the tap hole and its closing member will be added, and the other portions will be denoted by the same reference numerals as in the first embodiment, and redundant description thereof will be omitted.

In FIGS. 12 and 13, a step 23 is formed in the furnace 2 inside the furnace 2 as in the first embodiment, and a first tap hole 34 is formed in the step 23. Is provided. A refractory is not used for the first closing member 35, and an opening / closing lid 36 and a closing device 37 that can open and close the first tap hole 34 are used. Since the refractory is not loaded in the first tap hole 34, the coupler exemplified in the first embodiment is unnecessary, and a closing device 37 is disposed instead of the coupler.

The opening / closing lid 36 is for shutting off the outside air, and is substantially the same as the opening / closing lid 27 of the first embodiment.
Is disposed outside the furnace so as to be openable and closable with respect to the outside opening 342 of the first tap hole 34, and is driven by an actuator (not shown) or the like.

The shut-off device 37 is formed of a refractory material into a substantially cylindrical shape having a length and an outer diameter that can be connected to the furnace opening 341 of the first tap hole 34, and this is shown in FIG. As shown, it is supported by the elevating device 38 and is arranged to be able to ascend and descend in the through hole 51 of the upper wall 50 that covers the step 23 of the furnace body 2. Normally, it rises above the first tap hole 34 and waits above the first tap port 34, and when it descends, it is pressed against the first tap port 34 to close it. The closing device 37 is also used for supplying a fluid, and a supply port 80 of the fluid supply device 8 is inserted from an upper opening 371 of the closure device 37 so that compressed air or nitrogen gas supplied from the fluid supply device 8 is supplied to the first port. Outlet 34
Is to be blown into.

Next, the tapping (discharging of molten metal) method of the ash melting furnace will be described with reference to FIGS. Normally, as shown in FIG. 12, the furnace body 2 is supported by the tilting mechanism 10 and is fixed at a horizontal position where the surface of the molten metal 6 can be held horizontally. In addition, the first tap hole 34 is provided in FIG.
As shown in (2), it is closed by the opening / closing lid 36, and the outside air is shut off. In addition, the second tap 2
Numeral 8 is closed by filling with an amorphous refractory 291. In the furnace, while the incineration ash is continuously charged and the same amount of molten slag 61 is continuously dropped from the slag port 22, the step 23 provided in the furnace body 2 is at a level higher than the slag port 22. Is higher, the surface of the molten metal 6 does not rise to the step 23.

The continuous melting of the incinerated ash causes molten metal 62
When the layer has risen to a predetermined position, as shown in FIG. 16, the closing device 37 is first lowered by the lifting / lowering device 38, and its tip is pressed against the first tap hole 34 to open the furnace opening. When the tilting mechanism 10 is activated, the furnace body 2 is tilted, the molten metal 6 is guided by the inclined surface 26, flows on the step 23, and is moved onto the first tap hole 34. . The furnace body 2 is stopped at a predetermined tilt angle. When the molten metal 6 moved between the furnace bottom 21 and the step portion 23 of the furnace body 2 is vertically separated to form a layer of the molten slag 61 and a layer of the molten metal 62, first, the outside of the first tap hole 34. The opening / closing lid 36 is opened by the actuator, and the furnace opening 342 of the first tap hole 34 is opened.

Subsequently, as shown in FIG.
Is raised by the elevating device 38, whereby the molten metal 6 is discharged through the fully opened first tap hole 34. At this time, the molten metal 62 below the molten metal 6 is discharged from the first tap hole 34. When a predetermined amount of the molten metal 62 has been discharged, the closing device 3 is opened from above the first tap hole 34.
7 is lowered by the lifting / lowering device 38, and the tip is
Is pressed against the tap 34 of the hot spring. As a result, the furnace opening 341 is closed, and the discharge of the molten metal 6 (molten metal 62) is stopped. Subsequently, the tilting mechanism 10 is activated, and the furnace body 2 is tilted back to the original horizontal position. With this tilt,
The molten metal 6 on the step 23 flows down toward the furnace bottom 21, and at the horizontal position of the furnace body 2, the surface of the molten metal 6 is lower than the level of the first tap 34 (opening 341 in the furnace). Further, the molten metal 62 is lowered from the level of the slag outlet 22 to a position lowered by the amount of the discharged molten metal 62 (see FIG. 18).

Following the stoppage of tapping, as shown in FIG. 18, compressed air or nitrogen gas G is supplied from the fluid supply device 8 in which the supply port 80 is inserted into the closing device 37, and the compressed air or nitrogen gas G is supplied. Is the first tap 3 through the closure 37
It is blown into 4. Thereby, the residue such as the molten metal 62 attached to the inner surface of the first tap hole 34 is removed, and the inside of the first tap port 34 is cleaned. Subsequently, FIG.
As shown in FIG. 9, when the opening / closing lid 36 is closed by the actuator and the first tap hole 34 is closed, the closing device 37 is closed.
Is lifted by the elevating device 38 and again waits above the first tap hole 34.

As described above, according to the third embodiment, as shown in FIGS.
Separately, a first tap hole 34 is provided outside the inner periphery of the furnace body 2 and at a position higher than the slag port 22 of the molten metal, and the first tap port 34 is closed and opened by a closure device 37. Since the body 2 is tilted by the tilting mechanism 10 and the molten metal 6 is moved onto the first tap hole 34, the molten metal 6 is discharged by opening the first tap port 34. Only the lower molten metal 62 can be discharged, and the same operation and effect as in the first embodiment can be obtained in this case.

Further, in particular, the first tap hole 34 is closed
Therefore, the tapping can be stopped immediately, and the discharge amount of the molten metal 62 can be adjusted more accurately. Further, unlike the first embodiment, since no refractory is used, an expensive refractory and a supply device for the refractory are not required.
Cost can be reduced.

FIG. 20 is a partial sectional view of the first and second tap holes in the fourth embodiment of the present invention. (Embodiment 4) In the fourth embodiment, the configuration of the first and second tap holes is different from that of the third embodiment, and the configuration of other parts is the same as that of the third embodiment. A new description will be added to the second tap hole, and the other portions will be denoted by the same reference numerals as in the third embodiment, and redundant description thereof will be omitted.

In FIG. 20, a step 3 is provided inside the furnace body 2.
9. The first tap hole 40 is formed in the same configuration as in the second embodiment. That is, the upper surface of the step portion 39 is set at a position slightly higher than the slag port 22 of the molten metal.
A first tap hole 40 is provided on the step portion 39 so as to extend in the vertical direction from an upper side of the rear wall surface or the side wall surface. Therefore, in comparison with the third embodiment, in the case of the step portion 39, since the overall height is reduced, the length of the first tap hole 40 is reduced. Also,
In the case of the tap hole 40, since a common port with the second tap port 42 is not provided, the diameter of the lower part (lower half) thereof is not set large. Thus, the first tap 40 is
Inside the furnace body 2, it is provided outside the inner circumference at a position slightly higher than the level of the slag port 22. Refractory is not used for the first closing member 41 of the tap hole 40, and the first tap port 40 is opened and closed by the opening / closing lid 36 and the closing device 37. The opening / closing lid 36 and the closing device 37
Is as described in the third embodiment.

The second tap hole 42 is formed in the same configuration as in the second embodiment. That is, the furnace opening 421
Is formed on the edge of the furnace bottom 21 on the side of the first tap hole 40, is provided substantially in a substantially cylindrical shape, and is provided obliquely downward, so that the outside of the furnace does not cross the first tap hole 40. An opening 422 is formed near the outside furnace opening 402 of the first tap hole 40. Here, the out-of-furnace opening 422 is set at a position corresponding to immediately below the out-of-furnace opening 402 of the first tap hole 40 at the lower portion of the rear wall surface or side wall surface of the furnace body 2. The tap hole 42 is closed by filling with an amorphous refractory 291 having a solidifying property, and is opened and closed by a perforating means 30 such as a drill.

Also in this case, the furnace body 2 is tilted by the tilting mechanism 10.
, The molten metal 6 is moved onto the first tap hole 40, and then the first tap port 40 is opened, thereby discharging only the lower molten metal 62 through the first tap port 40. Therefore, the same operation and effect as those of the first, second, and third embodiments can be obtained.

Further, by opening the second tap hole 42, the entire amount of the molten metal 6 can be extracted through the second tap port 42, and the furnace body 2 is moved by 6 degrees in the direction of lowering the second tap port 42. By slightly tilting by 8 to 8 degrees, the molten metal in the furnace bottom 21 can be guided to the second tap hole 42 and smoothly extracted, and even in this case, the first, second, and third embodiments are performed. The same operation and effect as the example can be obtained.

Further, the second tap hole 42 is connected to the first tap port 4.
0, and the first and second tap holes 40, 42
Are provided at positions close to each other, so that the first and second tap holes 40, 42 are provided from inside the furnace.
Can be discharged at a common position outside the furnace, and the molten metal 6 can be efficiently discharged.

[0050]

As is clear from the above embodiments, the present invention is different from the slag port of the molten metal in the inside of the furnace body with respect to the inner periphery thereof and more than the slag port of the molten metal. High position first
In order to discharge the required amount of molten metal by closing and opening it with a closing member so that it can be opened and closed, the furnace body is tilted by the tilting mechanism, and the molten metal is moved onto the first molten metal outlet. ,
Since the molten metal is extracted from the lower layer by opening the first tap, the required amount of molten metal is extracted from the lower layer through the first molten metal outlet without discharging the upper layer of the molten metal. And the discharge can take place during operation of the furnace. In particular, in the case of melting incineration ash, it is possible to reliably discharge only the required amount of molten metal while keeping the molten slag floating on the molten metal layer. Further, since the molten metal and the molten slag can be discharged to different routes, the discharging operation of the molten metal can be performed safely and efficiently.

Further, a second tap hole is provided at an arbitrary position on the bottom of the furnace, and the second tap hole is opened and closed by a closing member to discharge the entire amount of molten metal. The furnace body is tilted as necessary to guide the molten metal to this tap hole, so that its discharge is smooth and
Can be done quickly. In particular, when the entire amount of molten metal is discharged during maintenance of the ash melting furnace, the furnace body does not need to be almost tilted, and the discharge operation of the molten metal can be performed easily, safely, and in a short time. In addition, a simple structure can be used to connect the furnace body to a tilting mechanism, a furnace body and a dust collection duct, an ash charging conveyor, a slag discharge cover, and other peripheral devices. Further, by discharging the entire amount of the molten metal, the closing member can be filled in the second tap hole from inside the furnace, and this operation can be easily performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a ash melting furnace and a tapping device thereof during a melting operation in a first embodiment of the present invention.

FIG. 2 is a sectional view of the ash melting furnace and its tapping device during tapping.

FIG. 3 is a partially enlarged sectional view of a first and second tap holes of the ash melting furnace.

FIG. 4 shows a normal mode during a melting operation of the ash melting furnace;
The first and second tap holes are closed by a closing member,
Sectional drawing of the aspect in which the coupler was on standby on the first tap hole

FIG. 5 is a sectional view showing an operation of starting tapping of the ash melting furnace, in which the furnace body is tilting.

FIG. 6 shows an operation during tapping of the ash melting furnace, in which a first tap hole is opened by opening and closing of an opening / closing lid and discharging of a refractory;
Sectional view of the mode in which molten metal is discharged through a tap hole

FIG. 7 is a cross-sectional view showing an operation of stopping the tapping during the melting operation of the ash melting furnace, in which the first tap is closed by a coupler.

FIG. 8 is a sectional view showing an operation of the ash melting furnace after tapping, in which the first tap is cleaned.

FIG. 9 is a sectional view showing an operation of the ash melting furnace after tapping, in which a first tap hole is filled with a refractory.

FIG. 10 is a cross-sectional view showing an operation after tapping of the ash melting furnace, in which filling of the first tap hole with refractories has been completed and the coupler has been raised;

FIG. 11 is a partial sectional view of an ash melting furnace according to a second embodiment of the present invention.

FIG. 12 is a cross-sectional view of a ash melting furnace and a tapping device thereof during a melting operation according to a third embodiment of the present invention.

FIG. 13 is a sectional view of the ash melting furnace and its tapping device during tapping.

FIG. 14 is a partially enlarged sectional view of the first and second tap holes of the ash melting furnace.

FIG. 15 shows a normal mode during the melting operation of the ash melting furnace, in which the first and second tap holes are closed by a closing member, and the shut-off device is on standby on the first tap port. Cross section of

FIG. 16 is a cross-sectional view showing an operation of starting the tapping of the ash melting furnace, in which the first tap hole is closed in the furnace by the lowering of the closing device, and the furnace body is tilting.

FIG. 17 shows the operation of the ash melting furnace during tapping, in which the first tap is opened by opening and closing the opening / closing lid and raising the closing device;
Sectional view of an aspect in which molten metal is discharged through a first tap hole

FIG. 18 is a cross-sectional view of a mode in which the tapping of the shut-off device stops the tapping and the first tap is cleaned during the melting operation of the ash melting furnace.

FIG. 19 is a cross-sectional view showing an operation of the ash melting furnace after tapping, in which the first tap is closed by closing the opening / closing lid and the shutter is raised.

FIG. 20 is a partial sectional view of an ash melting furnace according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ash melting furnace 11 Hot water supply apparatus 2 Furnace body 20 Peripheral wall 21 Furnace bottom 210 Bottom surface 22 Slag outlet 23 Step portion 24 First tap hole 241 In-furnace opening 242 Out-of-furnace opening 243, 244 Communication opening 248 Common opening 25 Edge 26 Inclined surface 27 First closing member 271 Refractory (sand) 272 Opening / closing lid 28 Second tap hole 281 Furnace opening 282 Furnace communicating portion 283 Outside furnace communicating portion 284 Outside furnace opening 29 Second closing member 291 Refractory Reference Signs List 30 drilling means 31 step 32 first tap hole 321 furnace opening 322 outside furnace opening 33 second tap hole 331 inside furnace opening 332 outside furnace opening 34 first tap hole 341 inside furnace opening 342 outside furnace opening 35 first 1 closing member 36 opening / closing lid 37 closing device (closing body) 371 opening 38 elevating / lowering device 39 step portion 40 first tap hole 401 inside furnace opening 402 outside furnace opening 41 first closing Closing member 42 Second tap hole 421 Opening inside furnace 422 Opening outside furnace 3 Electrode (negative electrode side) 4 Electrode (positive electrode side) 5 Top wall 50 Upper wall 51 Through hole 6 Molten metal 61 Melted slag 62 Molten metal 7 Body) 70 Opening 71 Lifting device 8 Fluid supply device 80 Supply port 9 Refractory supply device 90 Supply port 10 Tilt mechanism 110 Support device 111 Rotary shaft 112 Bearing 120 Drive device 121 Hydraulic cylinder 13 Incineration ash supply device 130 Supply port G Compressed air Or nitrogen gas

Claims (15)

[Claims] 1. A molten metal slag port formed at a predetermined height from the furnace bottom in a furnace body, and a position inside the furnace body outside the inner periphery thereof and higher than the molten metal slag port. A first tap hole formed at the bottom of the furnace, a second tap port formed at an arbitrary position on the furnace bottom, and first and second closing members for opening and closing the first and second tap ports, respectively. A melting furnace comprising: 2. A first tap hole formed inside the furnace body outside the inner periphery thereof and at a position higher than a slag level of the molten metal, and formed at an arbitrary position on the furnace bottom. A second tap hole, first and second closing members that openably close the first and second tap ports, and a tilting mechanism that tilts the furnace body. Tapping equipment. 3. The tapping device of a melting furnace according to claim 2, wherein the first tapping port is arbitrarily provided in a range of 90 to 180 degrees from the tapping port around the furnace body. 4. The first tap hole is formed in a substantially cylindrical shape.
4. The tapping device for a melting furnace according to claim 2, wherein the closing member includes a refractory that can be loaded into the inside of the first tap and an opening / closing lid that can open and close the outside opening of the first tap. 5. . 5. The tapping device for a melting furnace according to claim 4, wherein a refractory material having fluidity is used for the refractory. 6. A furnace, which is disposed on a first tap hole of a furnace body so as to be able to move up and down, and is connected to the first tap port inside the furnace to connect the first tap port with a supply source of fluid and / or refractory. The tapping device for a melting furnace according to claim 4, further comprising a communicable connection body. 7. The melting furnace according to any one of claims 2 to 6, further comprising a closing body that is disposed on the first tap hole of the furnace body so as to be able to move up and down and that can close the first tap port inside the furnace. Tapping equipment. 8. The second tap hole is formed in a substantially cylindrical shape.
The tapping device of a melting furnace according to any one of claims 2 to 7, further comprising a refractory capable of filling the inside of the second tap hole in the closing member. 9. The tapping device of a melting furnace according to claim 8, wherein a refractory material having a solidifying property is used for the refractory. 10. The tapping device for a melting furnace according to claim 2, wherein the second tapping hole is pierced by a piercing means. 11. The tapping device for a melting furnace according to claim 2, wherein the second tap is formed so as to be able to communicate with the first tap. 12. The second tap hole has an opening in the furnace formed on the first tap port side, and is provided to cross the first tap port so that the inside of the furnace and the first tap port are connected to each other. The tapping device of a melting furnace according to any one of claims 2 to 11, further comprising: an in-furnace communicating portion that can communicate with the first furnace, and an out-of-furnace communicating portion that allows communication between the first tap hole and the outside of the furnace when extended. 13. A communication port inside the furnace of the second tap hole and a communication port outside the furnace, two communication ports are provided on the peripheral surface of the first tap port so as to face each other, and between the communication ports. 13. The tapping device for a melting furnace according to claim 12, wherein the diameter of the peripheral surface of the first tap hole is partially enlarged so that the first tapping port can be separated by a predetermined distance. 14. The second tap hole, the opening inside the furnace is provided on the side of the first tap hole, and the outside opening of the furnace is formed near the outside opening of the first tap hole. 14. A tapping device for a melting furnace according to any one of claims 13 to 13. 15. The tapping device for a melting furnace according to claim 2, wherein the tilting mechanism includes a support device that tiltably supports the furnace body and a driving device that tilts the furnace body.