JP6465479B2 - Metal melting furnace - Google Patents

Description

  The present invention relates to a metal melting furnace for melting a metal material such as aluminum.

  Conventionally, for example, as a metal melting furnace for melting a metal material (melting material) such as aluminum, a charging port for charging the metal material, a material melting part for melting the metal material charged from the charging port, and melting the metal material And a holding pool for holding the molten metal heated in the heated pool (for example, see Patent Document 1).

  In this metal melting furnace, an ingot-shaped metal material is used. The input port has a tower shape that is long in the vertical direction, and a large number of metal materials input to the input port accumulate in the vertical direction in the input port. The metal material deposited in this manner is melted from the lower portion to become a molten metal, and moves to the material melting portion.

  The material melting part has an inclined surface that inclines downward from the charging port toward the heating pool. The molten metal flows along the inclined surface and flows into the heating pool. The molten metal flowing into the heating pool is heated to a high temperature by a heating burner provided above the heating pool. The heated molten metal flows into the holding pool through a partition provided between the heating pool and the holding pool (see paragraphs 0014 to 0018 and FIG. 7 of the same document).

JP-A-9-176754

  By the way, in the metal melting furnace, in addition to the above-described regular (ingot-shaped) metal material, for example, a return material that is an unnecessary part such as a burr other than a cast product generated during casting can be input. Unlike a regular metal material such as an ingot, the return material has various irregular shapes and is usually smaller than the regular (ingot-shaped) material.

When melting such a small metal material in a conventional metal melting furnace, the following problems have occurred. That is, as described above, a large number of large-sized (ingot) metal materials deposited in the inlet are dissolved in order from the lower portion thereof. Only the material that stays in the inlet and melts into the molten metal flows through the inclined surface of the material melting portion and flows into the heating pool.

  As in the case of a large metal material, the small metal material is deposited in the inlet and melted from the lower portion thereof. However, because of its small size, the undissolved portion is not locked to the wall surface of the charging port, and flows along the inclined surface of the material melting portion together with the molten metal and flows into the heating pool.

  When the undissolved part flows into the heating pool in this way, the molten metal flows into the holding pool without being sufficiently heated in the heating pool, and the original capacity (notification capacity) of the metal melting furnace is increased. It was not able to be demonstrated. Further, when the cleaning port is provided in the vicinity of the heating pool, there is a possibility that the molten metal overflowing from the heating pool may overflow from the cleaning port.

This invention is made | formed in view of said situation, and it aims at providing the metal melting furnace which can melt | dissolve a metal material suitably.

The present invention has been made to solve the above problems, a metal melting furnace for dissolving the metallic material, and inlet for introducing said metallic material, a burner for dissolving the metallic material, wherein A pool for storing a molten metal obtained by melting the metal material by a burner, and a staying part for temporarily retaining the metal material are provided between the charging port and the pool.

Thus, the metal melting furnace, since it comprises a retention portion for temporarily staying a metallic material, by irradiating the flame of the burner to the metallic material located dwell portion, the metal without leaving undissolved portion It becomes possible to melt all the materials into a molten metal. Also, portions of the undissolved deposited in the pool melt can be prevented from overflowing from the pool, and further, can also be reliably prevented that the overflowing molten metal from the cleaning opening can be provided in the vicinity of the pool It becomes like this.

Furthermore, in the metal melting furnace according to the present invention, the staying portion is provided on a receiving surface and a downstream side of the receiving surface, and guides the molten metal obtained by melting the metal material on the receiving surface to the downstream side. The guide surface is provided with an inclined first guide surface provided at an end portion on the downstream side of the receiving surface and a first guide surface provided on the downstream side of the first guide surface and along the vertical direction. A second guide surface and a third guide surface formed at a part of a columnar structure provided at an end in the width direction of the receiving surface, the third guide surface in the width direction of the receiving surface. A surface for guiding the molten metal flowing through the end portion so as to approach a central portion in the width direction of the receiving surface, and the burner irradiates a flame only on the receiving surface; and the flame is applied to the receiving surface. The second guide surface and the pooh without irradiating Of the a bottom surface and a second burner for irradiating a flame.

In this way, the metal material staying on the receiving surface is irradiated with the flame of the first burner, and the metal material moved from the receiving surface to the guide surface is irradiated with the flame of the second burner, thereby leaving an undissolved portion. no, it is possible to completely melt to dissolve all of the metallic materials.

According to the present invention, the metal material can be suitably dissolved.

It is side surface sectional drawing which shows the whole structure of the metal melting furnace which concerns on this invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG.

  Hereinafter, embodiments for carrying out a metal melting furnace according to the present invention will be described with reference to the drawings. 1 to 3 are sectional views showing a metal melting furnace in one embodiment of the present invention.

  This metal melting furnace can melt non-ferrous metal materials such as aluminum and copper. This metal material includes a large and regular (for example, ingot) and a small and irregular shape. With regard to the shape and size of the metal material, for example, in the case of an ingot, a long shape of 95 mm × 40 mm × 670 mm can be used, but it is not limited to this dimension. Small and irregular shaped metal materials include return materials, scraps, etc., but their shapes and sizes vary.

  Hereinafter, a large and regular metal material is simply referred to as “large metal material”, and a small and irregular metal material is simply referred to as “small metal material”. Further, the large metal material and the small metal material may be collectively referred to simply as “metal material”.

  As shown in FIG. 1, the metal melting furnace 1 includes an inlet 2 for introducing a metal material into the furnace, a guide path 3 for guiding the metal material introduced from the inlet 2 downward, and a guide path 3. A stay part 4 for temporarily retaining the metal material guided by the above, a burner 5 for dissolving the metal material staying in the stay part 4, and a pool 6 for storing a molten metal obtained by dissolving the metal material by the burner 5; Is provided.

  The metal melting furnace 1 moves the metal material charged from the charging port 2 to the staying part 4 through the guide path 3, and also adds the flame F (Fa) of the burner 5 (5a, 5b) to the metal material that has reached the staying part 4. , Fb) is melted by irradiation, and the resulting molten metal is moved from the staying portion 4 to the pool 6. That is, the molten metal flows from the guide path 3 side toward the pool 6. Hereinafter, when the flow of the molten metal in the staying part 4 and the positional relationship of the elements constituting the staying part 4 are described, the guide path 3 side is referred to as upstream (side) and the pool 6 side is referred to as downstream (side).

  The inlet 2 has a sufficient opening area so that a plurality of large metal materials or small metal materials can be charged at a time. The guide path 3 is connected to the lower portion of the insertion port 3. The guide path 3 has an inclined surface 7 that is inclined at a predetermined angle with respect to the horizontal direction (or vertical direction).

  As shown in FIG. 1 and FIG. 2, the staying portion 4 includes a receiving surface 8 for retaining a metal material and a guide surface 9 provided on the downstream side of the receiving surface 8. The receiving surface 8 is configured in a horizontal shape, and one upstream end portion 8 a is connected to the inclined surface 7 of the guide path 3, and the other downstream end portion 8 b is connected to the guide surface 9.

  The guide surface 9 guides the molten metal obtained by melting the metal material on the receiving surface 8 to the pool 6. The guide surface 9 includes a first guide surface 9a connected to the downstream end 8b of the receiving surface 8, a second guide surface 9b positioned on the downstream side of the first guide surface 9a, and a width direction of the receiving surface 8. And a third guide surface 9c provided at the end 8c.

  The first guide surface 9a is configured as an inclined surface that is inclined at a predetermined angle with respect to the horizontal direction. More specifically, the 1st guide surface 9a is an inclined surface which inclines below as it goes downstream. In the present embodiment, the inclination angle of the first guide surface 9a is, for example, about 45 °, but is not limited thereto. The second guide surface 9b is configured as a vertical surface along the vertical direction (vertical direction). The second guide surface 9 b also serves as a side wall of the pool 6. As shown in FIG. 2, the third guide surface 9 c is an end portion 8 c in the width direction of the receiving surface 8, and is a part of the columnar structure 10 provided in the vicinity of the downstream end portion 8 b of the receiving surface 8. It is formed in the part. The third guide surface 9c guides the molten metal flowing in the vicinity of the end portion 8c in the width direction of the receiving surface 8 so as to approach the center portion in the width direction of the receiving surface 8 as indicated by an arrow M in FIG. To do.

  The burner 5 includes two first burners 5 a that irradiate the flame Fa toward the receiving surface 8 and one second burner 5 b that radiates the flame Fb toward the guide surface 9. The first burner 5 a and the second burner 5 b are attached to the furnace wall of the metal melting furnace 1 at a position above the pool 6. As shown in FIG. 1, each first burner 5 a irradiates the flame Fa obliquely from this position toward the receiving surface 8. The two first burners 5a are arranged so as to irradiate the flame Fa (see FIG. 2) near the end 8c in the width direction of the receiving surface 8, and each first burner 5a has the receiving surface 8 The flame Fa is irradiated toward the metal material deposited on the upstream side of the flame. The second burner 5b is disposed between the two first burners 5a and irradiates the flame Fb toward the second guide surface 9b as shown in FIGS. Further, a part of the flame Fb of the second burner 5 b is also irradiated to the bottom surface 11 of the pool 6.

  The pool 6 accommodates the molten metal flowing along the receiving surface 8, the first guide surface 9a, the second guide surface 9b, and the third guide surface 9c on the downstream side. Although not shown, the metal melting furnace 1 is provided with a holding furnace (holding pool) adjacent to the molten metal. The pool 6 is connected to the holding furnace, and the accommodated molten metal can be sent to the holding furnace. That is, as shown in FIG. 3, the bottom surface 11 of the pool 6 is an inclined surface inclined at a predetermined angle (for example, about 10 ° with respect to the horizontal direction) so that the molten metal can be sent to the holding furnace. Yes. The direction in which the molten metal flows in the pool 6 intersects (for example, orthogonal) with the direction in which the molten metal flows in the stay portion 4. A cleaning port 12 for cleaning the pool 6 is formed on the upstream side of the pool 6, and a discharge port 13 for discharging the molten metal toward the holding furnace is formed on the downstream side.

  Hereinafter, the melting method of the metal material by the metal melting furnace 1 having the above configuration will be described. First, a metal material is charged into the furnace from the charging port 2. The introduced metal material is guided downward along the inclined surface 7 of the guide path 3. Thereafter, the metal material reaches the receiving surface 8 of the staying portion 4 connected to the lower end portion of the inclined surface 7.

  If the metal material is continuously supplied from the input port 2, the metal material is accumulated upward at the upstream end 8 a of the receiving surface 8. Only the large metal material may be deposited on the receiving surface 8, or only the small metal material may be deposited. Further, a large metal material and a small metal material may be mixed and deposited on the receiving surface 8.

  Next, the lower part of the deposited metal material is irradiated with the flame Fa by the first burner 5a. By irradiation with such a flame Fa, the metal material is melted in order from the lower part to become a molten metal. An upstream end 8 a of the receiving surface 8 is connected to the inclined surface 7 of the guide path 3. That is, the upstream side of the receiving surface 8 is closed by the inclined surface 7. Therefore, the molten metal is pushed by the undissolved metal material located above and gradually moves to the downstream side, and does not flow backward further from the end portion 8a of the receiving surface 8 to the upstream side.

  The molten metal flowing downstream on the receiving surface 8 flows into the pool 6 on the downstream side through the first guiding surface 9a and the second guiding surface 9b. Further, the molten metal flowing through the end portion 8c in the width direction of the receiving surface 8 is guided to the third guiding surface 9c and guided to the center portion side in the width direction of the receiving surface 8, and the first guiding surface 9a and the second guiding surface. It flows into the surface 9b and flows into the pool 6 through the second guide surface 9b.

  The molten metal flowing into the pool 6 from the second induction surface 9b is heated by the second burner 5b, and is maintained at a predetermined temperature so that the temperature does not decrease. The molten metal accommodated in the pool 6 is guided by the bottom surface 11 of the pool 6 and transferred to a holding furnace adjacent to the metal melting furnace 1.

  According to the metal melting furnace 1 according to the present invention described above, the metal material is temporarily retained on the receiving surface 8 in the retention portion 4, and the metal material is irradiated with the flame Fa of the first burner 5a. A metal material can be melted to form a molten metal. More specifically, since the upstream end 8 a of the receiving surface 8 of the staying portion 4 is connected to the inclined surface 7 of the guide path 3, the molten metal does not flow backward on the receiving surface 8, and the receiving surface 8 Due to the pressure from the upper metal material deposited on 8, it gradually moves to the downstream side of the receiving surface 8.

  Therefore, the receiving surface 8 of the staying portion 4 can reduce the moving speed of the molten metal when compared with the inclined surface. By irradiating the receiving surface 8 with the flame Fa of the first burner 5a, a large metal Even a small metal material as well as a material can be completely melted into a molten metal without leaving an undissolved portion. Thereby, it can prevent that the undissolved part of a small metal material accumulates in the pool 6, and a molten metal overflows from the pool 6, and can also prevent that a molten metal overflows from the cleaning port 12 reliably. .

  Moreover, since the flame | frame Fb of the 2nd burner 5b is also irradiated to the 2nd guide surface 9b of the retention part 4, a metal material can be melt | dissolved more reliably. In particular, the molten metal flowing in the vicinity of the end portion 8c in the width direction of the receiving surface 8 is guided toward the center portion in the width direction of the receiving surface 8 by the third guide surface 9c, and is irradiated with the flame Fb by the second burner 5b. Will be. Therefore, almost all of the molten metal flowing on the receiving surface 8 is heated in two stages by the flame Fa of the first burner 5a and the flame Fb of the second burner 5b. As a result, even if there is a small metal material in which a portion that is not melted by the heating of the first burner 5a remains, it can be melted by the heating by the second burner 5b to make all the molten metal. Further, since the second burner 5b irradiates the bottom surface 11 of the pool 6 with the flame Fb, the second burner 5b can be maintained at a predetermined temperature without lowering the temperature of the molten metal flowing into the pool 6.

  In addition, the metal melting furnace 1 which concerns on this invention is not limited to the structure of the said embodiment. Moreover, the metal melting furnace 1 which concerns on this invention is not limited to an above-described effect. The metal melting furnace 1 according to the present invention can be variously modified without departing from the gist of the present invention.

  In the above embodiment, the example in which the staying portion 4 includes the receiving surface 8, the first guide surface 9a, the second guide surface 9b, and the third guide surface 9c is shown, but the present invention is not limited to this. The guide surface 9 of the retention part 4 may be comprised only by the 1st guide surface 9a (inclined surface), and may be comprised only by the 2nd guide surface 9b (vertical surface).

  In the above embodiment, the receiving surface 8 of the staying portion 4 is configured horizontally. However, the present invention is not limited to this, and the receiving surface 8 may be a convex or concave curved surface, for example, downstream. You may make it the structure provided with the inclined surface which inclines upwards as it goes to. When a convex curved surface is employed for the staying portion 4, the first guide surface 9a and the second guide surface 9b may be omitted. Moreover, the retention part 4 may be provided in the middle part of the inclined surface 7 of the guide path 3, and the lower part of the guide path 3 and the pool 6 may be directly connected in this case.

  In said embodiment, although the guide path 3 was comprised by the one inclined surface 7, it is not limited to this. The guide path 3 may be configured by a plurality of inclined surfaces with different inclination angles, or may be configured with an inclined surface and a vertical surface. Moreover, you may comprise the guide path 3 only with a vertical surface.

  In the above embodiment, the example in which the second burner 5b irradiates the flame Fb toward the second guide surface 9b has been described. However, the present invention is not limited thereto, and the flame Fb of the second burner 5b is applied to the first guide surface 9a. You may irradiate toward. In the above embodiment, the example in which the metal material is dissolved using the two first burners 5a and the second burner 5b has been described. However, the present invention is not limited to this, and the first burner 5a and the second burner 5b are used. The number and positional relationship of the two burners 5b can be appropriately set according to the size and capacity of the metal melting furnace 1.

DESCRIPTION OF SYMBOLS 1 Metal melting furnace 2 Input port 4 Retaining part 5 Burner 6 Pool 8 Receiving surface 9 Guide surface

Claims (1)

A metal melting furnace for dissolving the metallic material,
A slot for charging the metal material;
A burner for dissolving the metal material;
A pool for storing molten metal obtained by melting the metal material by the burner;
A retention portion that is provided between the inlet and the pool and that temporarily retains the metal material ;
The stay portion includes a receiving surface and a guide surface that is provided on the downstream side of the receiving surface and guides the molten metal obtained by melting the metal material on the receiving surface to the downstream side,
The guide surface includes an inclined first guide surface provided at an end portion on the downstream side of the receiving surface, a second guide surface provided on the downstream side of the first guide surface and along a vertical direction, and the receiving device. A third guide surface formed on a part of a columnar structure provided at an end in the width direction of the surface,
The third guiding surface is a surface that guides the molten metal flowing through the end portion in the width direction of the receiving surface to approach the center portion in the width direction of the receiving surface,
The burner includes a first burner that irradiates a flame only on the receiving surface, and a second burner that irradiates the second guiding surface and the bottom surface of the pool without irradiating the receiving surface with a flame. Metal melting furnace.

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