JP2783752B2 - Melting furnace for aluminum waste - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a furnace for melting a long aluminum alloy waste material such as a bar used in a window sash.

[0002]

2. Description of the Related Art Conventionally, this type of melting furnace is disclosed in
No. 156378 discloses that the inside of the furnace is divided into a molten metal storage section and a molten material charging section, and the molten metal in the molten metal storage section flows into the molten material charging section. The molten metal in the portion is swirled by a moving magnetic field generator (electromagnetic stirrer) provided on the bottom wall.

The above moving magnetic field generator is provided on the bottom wall of the molten material charging section. The moving magnetic field generating apparatus is provided on the side wall so as to cover the outer wall thereof, and is further provided on the inner peripheral surface of the molten material charging section. By providing the projections, the spirally-wound molten metal travels up the inner peripheral surface and climbs up, and the rising hot water is blocked by the projections and falls so as to rain, and the aluminum falling from the input port is crushed. There has been proposed a method in which a molten material is showered on waste material to speed up the melting and prevent oxidation due to high temperature.

[0004]

By the way, there is a demand for a method of using a furnace having the above structure, in which a long material such as a sash bar for a window is directly charged and melted, not limited to a crushed material. However, if melting is performed in a furnace of this type, the processing speed can be increased rapidly. However, when the furnace is put in a long state, there is a problem that the inner surface of the furnace is shaved at the lower end of the long material and wear is accelerated.

[0005] Further, when the long material is charged as it is, the upper portion of the long material falls into the molten material charging portion as the lower portion of the long material inserted into the molten material charging portion is sequentially melted. In some cases, it fell down on the way and fell outside the molten material charging section.

In view of the above problems, the present invention, however, inserts a long waste material into a furnace having a molten material charging section into which the molten metal falls like a shower, and then inserts the waste material into the melting material charging section over the entire length. Is to improve it.

[0007]

A solution according to the present invention is that a cylindrical molten material charging section is provided in the furnace body so as to communicate with the molten metal of the furnace body so as to circulate and flow therein. It is characterized in that a moving magnetic field generator that covers along the outer wall is installed, and a cylindrical charging guide is detachably provided at a charging port of the molten material charging section.

Preferably, a projection is provided at a position higher than the liquid surface of the molten metal on the inner peripheral surface of the molten material charging section.
Furthermore, the lower part of the charging guide is inserted and provided from the charging port of the molten material charging section. Alternatively, it is preferable that the introduction guide is formed in a tapered shape in which the inner diameter becomes smaller from the upper opening to the lower opening.

[0009]

Since the feeding guide is provided as described above, the long waste material inserted into the feeding guide is put into a nearly upright state, so that the middle portion of the waste material put in like a shower is softened. Even if it is bent again, the portion of the waste material still standing outside the furnace does not fall out of the furnace, but is sequentially guided by the introduction guide and falls into the molten material introduction section.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to FIGS. 1 and 2. As shown in FIG. 1 and FIG. At least a semi-circular portion of the wall of the part 2 is provided so as to protrude outward from the furnace wall, and a through hole 3 through which the molten metal in the furnace (original metal) flows into a lower part of the furnace inner side wall of the molten material charging part 2 is opened. In addition, an electromagnetic stirrer 4 is installed on the back surface of the bottom of the furnace 1, and a partition 5 is provided in the furnace 1 so as to be parallel to the longitudinal direction of the electromagnetic stirrer 4 at an intermediate portion between the through hole 3 and the electromagnetic stirrer 4. It rises and the molten metal is circulated in the furnace body 1 by the drive of the electromagnetic stirrer 4, and is formed so as to flow into the molten material charging section 2 during the circulation.

Further, a moving magnetic field generator 6 is provided which is formed in a semicircular shape along a semicircular wall protruding outside the furnace wall of the molten material charging section 2. The mounting position is provided over a range up to a position higher than the surface of the molten metal in the material charging section 2, and by driving the moving magnetic field generator 6, a rotational centrifugal force is applied to the molten metal in the molten material charging section 2. And the molten metal is set up in a parabolic shape along the inner wall to create a crucible state in the molten material charging section 2 with the molten metal.

The moving magnetic field generator 6 is driven by projecting the projections 7 annularly or spaced apart from each other at a position higher than the liquid surface of the molten metal on the inner wall surface of the molten material charging section 2. As a result, centrifugal force is applied to the molten metal, and the molten metal rises high along the inner wall surface of the molten material charging section 2. However, the rising of the molten metal is blocked by the projections 7, and the raised molten metal falls down into a central part in a shower shape. become. However, the projections 7 are not always necessary. Even if the projections 7 are not provided, the rising molten metal can flow down to the center in a shower shape, but it is most preferable that the projections 7 are provided.

In the furnace 1, a cylindrical charging guide 8 is provided at a charging port of the molten material charging section 2 so that a lower portion thereof protrudes into the molten material charging section 2. The means to be provided is such that a flange 9 covering the charging port of the molten material charging section 2 protrudes from the charging guide 8, and the flange 9 is detachably attached to the charging port by, for example, bolting means.

The lower part of the introduction guide 8 does not necessarily need to protrude into the molten material introduction part 2, but may be provided upright only above the flange 9 covering the molten material introduction part 2. Further, the loading guide 8 shown is a cylinder having the same diameter over the entire length, but may have a tapered shape whose diameter becomes smaller toward the lower portion.

Therefore, when the long waste material 10 is melted, as shown in FIG. 1, while the electromagnetic stirrer 4 and the moving magnetic field generator 6 are being driven, the long waste material 10 is introduced into the introduction guide 8.
The molten material is charged into the molten material charging section 2 through the through-hole so as to rise and enter a nearly upright state. As the lower part of the long waste material 10 is melted, the upper part thereof is guided into the charging guide 8 and the molten material is charged. It is dropped into the section 2.

[0016]

According to the melting furnace for aluminum waste according to the present invention, since the introduction guide is provided at the introduction port of the molten material introduction section, the waste guide rises almost upright by the introduction guide. When the lower end of the long waste material that has been thrown into the furnace reaches the furnace bottom, the waste material is softened by heat, so that there is no risk of damaging the furnace bottom, and the safety of the furnace can be ensured.

Furthermore, as the lower part of the long waste material is sequentially melted, the upper part is surely guided into the charging guide, so that the lower part does not fall out of the furnace on the way and can be reliably inserted into the furnace. It can be dissolved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a melting furnace for aluminum waste according to the present invention.

FIG. 2 is a transverse sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Furnace 2 Melting material input part 3 Through hole 4 Electromagnetic stirrer 6 Moving magnetic field generator 7 Projection 8 Input guide

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshiharu Watanabe 1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. (56) References JP-A-5-156378 (JP, A) JP-A-60-78284 (JP, A) JP-A-1-132724 (JP, A) JP-A-60-136352 (JP, U) JP-A-49-7103 (JP, U) (58) Fields investigated (Int) .Cl. ⁶ , DB name) C22B 1/00-61/00

Claims (1)

(57) [Claims] 1. A cylindrical molten material charging portion (2) is provided inside a furnace body (1), and a part of an outer wall of the material charging portion (2) protrudes outward from the furnace body (1). The molten metal of the furnace body (1) is provided so as to circulate and flow through a through hole (3) formed in the outer wall of the material charging section (2), and the molten metal liquid on the inner peripheral surface of the molten material charging section (2). In a melting furnace for aluminum waste material provided with a projection (7) at a position higher than a surface portion, a moving magnetic field generator (7) that covers the outer wall of the molten material charging section (2) protruding from the furnace body (1). (6) A melting furnace for aluminum waste material, wherein a cylindrical charging guide (8) is detachably provided at a charging port of the molten material charging section (2).