JPS60232475A - Melter for metallic material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for melting metal materials, and in particular has a preheating flue extending in the horizontal direction, and melts a metal melting material having a predetermined size and approximately rectangular parallelepiped shape in the preheating flue. This invention relates to a melting device that is preheated by exhaust gas from a chamber.

2. Description of the Related Art Vertical furnaces, such as so-called tower melters, have been known as apparatuses for melting metal materials that are provided with a melting chamber that extends in the vertical direction. And, such a melting device is "FAI2-Aru", pp. 27-32 (March 1982 issue), rMODERNMETAL SJ, Vo.
l, 38. As disclosed in Na1l, P, 76 (1982), etc., the furnace generally has a cylindrical furnace body installed in the vertical direction, and the furnace lid provided at the upper end opening of the furnace body is opened. , the metal material to be melted is charged from a predetermined charging machine, and the metal material charged into the furnace body is preheated while gradually descending within the furnace body, and is further heated. The material is melted by heating by a burner provided at the bottom of the furnace body, and is housed in a holding chamber connected to the bottom of the furnace body.

That is, in a vertically erected furnace body, metal materials introduced from above are gradually lowered as the lower metal materials introduced first are sequentially heated and melted by burners, and then During the descent, the metal material is preheated by the burner exhaust gas flowing upward through the furnace body, so when it reaches the lower part of the furnace body, it is in a semi-molten state. , so that it can be easily melted by a burner.

However, in such a melting device, as the metal material to be melted, metal melting materials having a substantially rectangular parallelepiped shape, such as elongated substantially square metal ingots, are arranged horizontally and stacked in multiple stages. When blocks, etc. are used, gaps tend to form between the molten metal material and the inner wall of the furnace, and high-temperature exhaust gas blows upward through such gaps, creating a so-called short path. This phenomenon occurs, and this poses an inherent problem in that the heat of the exhaust gas cannot be used effectively for material preheating. In addition, even if such a gap is small immediately after charging the material into the furnace, the material begins to melt as time passes after charging, and the gap between the furnace inner wall and the material becomes larger, causing the material to melt. This results in a reduction in the preheating effect.

On the other hand, instead of a device with a structure in which the preheating section is connected vertically to the melting section, a horizontal flue is installed to guide the high-temperature exhaust gas from the melting chamber in a horizontal direction. Although it is possible to use a structure that preheats the specified molten material in the flue, this method has the problem of a short path of exhaust gas due to the existence of a gap between the molten metal material and the inner wall of the flue, and furthermore, the preheating effect or heat generation problem. The problem of reduced exchange efficiency has not been satisfactorily solved.

Moreover, in this preheating method using the horizontal flue, the metal melting material itself varies in size and shape between material lots, and the shape of the metal melting material charged into the horizontal flue and the flue inner wall surface are different. It is not possible to keep the gap between the metal melting material as small as possible in order to always obtain high thermal efficiency, and for this reason, the size of the gap occurs depending on the size of the rectangular parallelepiped shape of the metal melting material. There is a problem that the preheating effect fluctuates and is not stable.

The present invention has been made against this background, and its object is to have a horizontal flue that guides high-temperature exhaust gas from the melting chamber in a horizontal direction. The object of the present invention is to improve the preheating effect of the metal molten material and to effectively utilize the input energy in a melting device that preheats the metal molten material to be moved within the road using the exhaust gas.

That is, in order to achieve such an object, the present invention provides a melting chamber in which a metal melt material having a predetermined size and a substantially rectangular parallelepiped shape is directly melted by a burner, and a melting chamber through which high-temperature exhaust gas from the melting chamber passes. and a horizontally extending preheating flue, the metal melting material being moved in the preheating flue being preheated to a predetermined temperature by exhaust gas led from the melting chamber, A damper device having a damper member in at least one location of the preheating flue that is protruded toward the molten metal material and that is movable back and forth for blocking the flow of exhaust gas passing through the gap between the material and the inner surface of the flue. It was established.

Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail based on the drawings.

First, in FIG. 1, the melting device 2 according to the invention has a preheating flue 4 as a preheating chamber located above and extending horizontally, and at the front end of the preheating flue 4, The melting chamber 6 has a melting chamber 6 which extends vertically downward and is open to the bottom, and a holding chamber 8 which is connected to the lower end of the melting chamber 6 and extends horizontally. A charge door 10 is provided at the entrance of the preheating flue 4 so that it can be raised and lowered.
While the inlet opening of the charging door 10 is opened and closed, the molten metal material 16 having a predetermined size and a substantially rectangular parallelepiped shape is charged from the charging machine 14 into the preheating flue 4. It's like being forced to do something. In addition,
Adjacent to the inlet of the preheating flue 4, an outlet 18 for discharging exhaust gas is provided at the lower part of the side wall thereof.

Further, in the melting chamber 6, the metal melting material 16, which has been intermittently pushed forward while being preheated by the exhaust gas inside the preheating flue 4, is substantially rolled over from the front end of the preheating flue 4. The melted metal material 16 is allowed to fall in this state, and the fallen metal melting material 16 is melted by a burner (not shown) provided at the bottom thereof.

The exhaust gas generated in the melting chamber 6 is guided in a direction opposite to the traveling direction of the metal melt material 16, passes through the preheating flue 4, and is discharged to the outside from the exhaust gas outlet 18. -ing

In addition, the metal i+8 molten metal 20 obtained by melting in the melting chamber 6 is introduced into the holding chamber 8, and the molten metal 20 accommodated and held in the holding chamber 8 is not shown in the figure. It is designed to be kept warm by a suitable burner device etc.

In such a melting device 2, according to the present invention, the first and second damper devices 22 and 24 are respectively provided in the preheating flue 4 portion.

Such first and second damper devices 22 and 24 are shown in detail in FIGS. 2-4. That is, as is clear from FIGS. 2 and 3, the first damper device 22 includes a heat-resistant shielding plate 26 as a damper member that penetrates the ceiling wall of the preheating flue 4 and protrudes into the interior. A ceiling damper device 30 composed of a cylinder 28 that advances and retreats the preheating flue 4, and a preheating flue 4 that similarly includes a heat-resistant shielding plate 32 and a cylinder 34 that advances and retreats the same.
A side wall damper device 36.
It consists of 36 parts. Moreover, the ceiling damper device 30 and the side wall damper device 36 of the first damper device 22
As shown in FIG. 2, the preheating flue 4 is provided in a position slightly shifted in the direction in which the preheating flue 4 extends, that is, in the direction in which the molten metal material 16 moves.

Further, in the direction in which the preheating flue 4 extends, a second damper device 2.4 is provided at a predetermined distance from the first damper device 22.
As shown in FIGS. 2 and 4, similarly to the balance damper device 30 in the first damper device 22,
It is composed of a shielding plate 38 that can pass through the ceiling of the preheating flue 4 and protrude inward, and a cylinder 40.

Therefore, a predetermined rectangular molten metal material 1 is fed from the charging machine 14 into the preheating flue 4 provided with such damper devices 22 and 24.
6 are sequentially charged and pushed through the flue 4, while the metal molten material 16 is preheated by high temperature exhaust gas led from the melting chamber 6, the metal molten material 16 and the preheating flue 4, i.e., mainly the gap between the upper surface of the metal molten material 16 and the inner wall surface of the ceiling of the preheating flue 4, and the gap between the side surface of the metal molten material 16 and the preheating flue 4. The presence of the first and second damper devices 22 and 24 effectively blocks the exhaust gas escaping (passing) through the gap between the inner surface of the side wall of the damper 4 and the inner surface of the side wall.

That is, the cylinder 2 of each damper device 22, 24 is
B. Due to the protrusion of the shielding plate 26° 32.38 by 34.40, the metal melting material 16 and the preheating flue 4 as described above are
This effectively eliminates the gap between the
This prevents the exhaust gas from being introduced to the exhaust gas outlet 18 on the inlet side of the preheating flue 4, thereby allowing effective contact between the high temperature exhaust gas and the molten metal material 16 within the preheating flue 4. Therefore, the preheating efficiency (heat exchange efficiency) can be significantly increased.

Note that the exhaust gas traveling straight in the preheating flue 4 is blocked by the shielding plates 38° and 32.26 in each gap, but the exhaust gas blocked by these shielding plates is The exhaust gas passes through a space where there is no plate, so that the passage of the exhaust gas in the preheating flue 4 becomes a zigzag, and effective heat exchange with the metal melting material 16 is achieved. .

In addition, each damper device 22 provided in the preheating flue 4
(30, 36, 36) and 24, the shielding plates 26, 32, 32.38 are connected to each cylinder 28, 34.
, 34. 40, so that even if the shape of the molten metal material 16 changes depending on the size of the charged material lot, as shown in FIG. Even if the upper gap, the left/right, and lateral gaps of 16 change, it is possible to effectively block these gaps. In short, each shielding plate 26.32.32.38 is advanced in a respective cylinder 28.34.3/1.40 until it comes into contact with the molten metal material 16, depending on the size of the material 16. , the material 16 is pressed with a predetermined pressing force. However, it goes without saying that such a pressing force is such that the shape of the melted metal material 16 is not deformed.

Furthermore, the respective shielding plates 26, 32, 32, 38 in such a damper device 22, 24 are arranged so that when the molten metal material 16 is pushed, i.e. from the inlet of the preheating flue 4, into the charging machine 14. When a new molten metal material 16 is charged, it is generally retracted as shown in FIG. 1 to prevent interference with the molten metal material 16 and damage to the damper devices 22 and 24. ing. In addition, in order to prevent damage to this damper device 22.24, the shielding plate 26.32.32.
Shielding plate 26.32.3 immediately after retraction and charging of 38
Control regarding the advance of 2.38 will be performed in conjunction with the activation signal of the charging machine 14.

Moreover, in the damper device 22, 24 of the above embodiment,
At the tip of each shielding plate 26, 32, 32, 38, a heat-resistant cushion portion 42, 44, 44, .
46 are provided, and the cushion portions 42, 44 .
44 and 46, the gap between the molten metal material 16 and the molten metal material 16 is made as small as possible.

By the way, the metal melting material 16 that is charged into the preheating flue 4 of the melting device 2 and preheated is as follows:
Any material can be used as long as it has a substantially rectangular parallelepiped shape of a predetermined size, but particularly in the present invention, such a material 16 can be used, for example, as shown in FIGS.
As shown in ``b''), long, substantially rectangular metal ingots 48 are arranged in the horizontal direction, and the metal ingots 48 are arranged in six stages, with the exception of the four metal ingots 48 at the bottom. It is preferable that the loading block be constructed by stacking the upper and lower adjacent steps (not including the stepped portions), and in general, in such a loading block, the metal base metals 48 constituting the upper and lower adjacent steps are stacked against each other. The molten metal material 16 made of such stacked blocks is pushed out from the front end of the preheating flue 4 and falls on its side. As shown in FIG.
Since the particles are dispersed in the melting chamber 6 in a separate state, their melting operation can be carried out advantageously.

Further, as shown in FIGS. 6(a), (b), and (C), the metal base metal 48 constituting the metal base metal 16 illustrated here is generally approximately It has a trapezoidal cross section, and as shown in FIG. 5(b), the plurality of metal base metals 48 are arranged alternately in each step so that the vertical directions are opposite to each other. They are combined and arranged parallel to each other.

Incidentally, such a metal base metal 48 is a so-called big metal (pig).
), and the most common shape is shown in Figures 5 and 6.
Further, as is well known, there is no problem with other cross-sectional shapes such as rectangular shapes, and furthermore, even if the metal base metal 48 has a stacked structure, other than the illustrated structure. The molten material is stacked vertically in a plurality of tiers in various forms, and then charged into the preheating flue 4 as a substantially rectangular molten material and preheated according to the present invention.

In addition, FIGS. 7 to 10 also show the damper device 22 (
Modifications of the ceiling damper device 30 and the side wall damper device 36 in 24) are shown, respectively.

That is, there, the ceiling damper device 30 is as shown in FIGS. 7 and 8F! ! J, the preheating flue 4 has a shielding plate 26 housed in a damper casing 50 that is airtightly attached to the cylinder 28.
It is attached via a wire 52 to an elevating frame 54 that can be moved up and down in the vertical direction. The shielding plate 26 has a width approximately equal to the width of the inner surface of the rectangular preheating flue 4, and can be raised and lowered by the lifting frame 54 in the vertical direction.

Further, as shown in FIGS. 9 and 10, the side wall damper device 36 includes a shielding plate 32 that protrudes into the preheating flue 4 at a predetermined height from the floor surface of the preheating flue 4. It has a structure housed in a damper casing 56 provided in the flue 4, and an operating frame 58 provided through the damper casing 56 is operated by the cylinder 34 as shown in FIG. By being forced to move from side to side,
The shielding plate 32 is made to protrude into the preheating flue 4 or to be retracted therefrom, so as to block the gap between the preheating flue 4 and the molten metal material 16 over a predetermined height range from the floor surface.

Although the specific examples illustrated in the drawings have been described in detail above, the present invention is by no means to be interpreted as being limited only to the specific examples illustrated and the explanations accompanying them.
It goes without saying that various changes, modifications, improvements, etc. can be made to the present invention based on the knowledge of those skilled in the art without departing from the spirit of the present invention, and the present invention encompasses such embodiments. It is intended to include the following.

Further, in the present invention, the preheating flue 4 extending in the horizontal direction
This is difficult to prevent with a conventional single-tower furnace, which simply has a preheating section and a melting section in the vertical direction.
This can effectively prevent a short path of exhaust gas due to melting of the material between the time of charging the material and the time of charging the next material. In order to reliably prevent the resulting short bath of the exhaust gas, the temperature of the exhaust gas led from the melting chamber 6 is detected at the front end of the preheating flue 4, Guided within. It is desirable to control the exhaust gas temperature so that it does not rise too much. Note that when this detected temperature exceeds a predetermined set value, a new metal melting material 16 is charged into the preheating flue 4, and the material 16 located at the leading edge thereof is charged into the melting chamber 6. That will happen.

Furthermore, in the above-mentioned example device, the first and second damper devices 22 and 24 are provided in the longitudinal direction of the preheating flue 4, but this can be replaced by simply using only one stage (one location) of the damper device. Furthermore, it is also possible to provide a damper device with three or more stages, which is more than the one illustrated, and in the damper device 24 of FIG. Although only devices (38, 40) are provided, it is also possible to provide side wall damper devices (36), similar to the first damper device 22.

Furthermore, in the present invention, the preheating flue 4 has a substantially rectangular cross section (inner surface) as shown in the example, in order to provide a damper device, and also to ensure that the preheating flue 4 has a substantially rectangular cross section (inner surface). Although this is desirable in terms of effectively blocking gaps, other cross-sectional shapes may be used, for example, a preheating flue having an arched ceiling or the like may be used.

Furthermore, the present invention can be suitably used in a melting device having a vertically extending melting chamber at the front end of the preheating flue 4 as illustrated, but is by no means limited thereto. If the melting device is equipped with a horizontally extending preheating flue, a melting chamber is provided at the front end of the horizontally extending preheating flue, and a predetermined metal melting material is melted there by burner heating. The present invention can also be applied to devices having a similar structure.

'As described above in detail, the present invention provides a damper installation device having a damper member that can move forward and backward in the preheating flue extending in the horizontal direction in a metal material melting device, and the damper member allows the metal melting material and smoke to be It is designed to shield the gap between the road surface and the road surface to block the flow of exhaust gas straight through the gap, thereby making effective contact between the exhaust gas and the molten metal material. In this way, the metal molten material is efficiently preheated, thereby achieving a remarkable improvement in thermal efficiency, and this is where the great industrial significance of the present invention can be found.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional front view of essential parts showing an example of the apparatus for melting metal melting materials according to the present invention, and FIG. 2 is an enlarged explanatory view of a preheating flue portion provided with a damper device in such an apparatus. , Figures 3 and 4 are the ■ in Figure 2, respectively.
-■Direction view ■-rV direction view, Fig. 5 (a
) and (b) are a plan view and a right side view thereof, respectively, showing an example of the metal melting material, and FIGS. They are a perspective view, a cross-sectional view, and a longitudinal cross-sectional view, and FIG. 7 is an explanatory diagram in a cross-sectional form of a preheating flue showing another example of the ceiling damper device, and FIG. 9 is an explanatory view (part) of a preheating flue cross-sectional form showing another example of the side wall damper device, and FIG. 10 is a XX direction view in FIG. 9. 2: Melting device ° 4: Preheating flue 6: Melting chamber 8: Holding chamber 10: Charge door 14; Charging machine 16: Metal melting material 18: Discharge port 20; Molten metal 22: First damper device 24; Second damper device 26.32, 38: Shielding plate 28.34, 40 Niji cylinder 30; Ceiling damper device 36: Side wall damper device 42.44.46: Suction portion 48: Metal base metal 50.56 = Damper casing 52 : Wire 54: Lifting frame 58 Two-acting frame Continued from page 1 0 Inventor Makoto Otani @ Inventor Masaki Mima @ Inventor Uemura Seiko 3-1 Sennen, Minato-ku, Nagoya Sumitomo Light Metal Industries, Ltd. Shinagawa Furnace Co., Ltd., 4-4 Kamata, Ota-ku, Tokyo

Claims (8)

[Claims] (1) A melting chamber in which a substantially rectangular parallelepiped metal melting material of a predetermined size is directly melted by a burner, and a preheating flue extending in the horizontal direction through which high-temperature exhaust gas from the melting chamber passes. and a melting device configured to preheat the metal melting material being moved in the preheating flue to a predetermined temperature by exhaust gas led from the melting chamber, the melting device having the metal melting material moved in the preheating flue to a predetermined temperature; A metal material characterized in that it is provided with a damper device having a damper member that is protruded toward the molten metal material and that can move forward and backward to block the flow of exhaust gas passing through the gap between the material and the inner surface of the flue. Melting equipment. (2) Claim 1, wherein the damper device is a ceiling damper device having a damper member protruding from the ceiling of the preheating flue toward the molten metal material in the flue.
The melting device described in Section 1. (3) The damper device is a side wall damper device having a damper member provided on at least one side wall of the preheating flue and protruding toward the molten metal material in the flue. The dissolving device according to item 1. (4) The damper device includes a ceiling damper device having a damper member that protrudes from the ceiling of the preheating flue toward the molten metal material in the flue, and at least one side wall of the preheating flue. a sidewall damper device having a damper member provided and projecting toward the molten metal material in the flue, the ceiling damper device and the sidewall damper device being arranged in a direction in which the preheating flue extends; The melting device according to claim 1, wherein the melting device is arranged at different positions. (5) The melting device according to claim 1, wherein the damper device is provided at a plurality of locations in the ceiling portion or side wall portion of the preheating flue in the direction in which the flue extends. (6) The melting device according to any one of claims 1 to 5, wherein the preheating flue has a substantially rectangular cross section. (7) The melting device according to any one of claims 1 to 6, wherein the melting chamber opens to the floor surface at the front end of the preheating flue and extends vertically downward. . (8) Any one of claims 1 to 7, wherein the metal melting material is a stacking block formed by stacking longitudinal, substantially rectangular metal ingots in a plurality of stages while arranging them horizontally. The dissolution apparatus described in .