JPH05140663A - Device for mixing metallic fine pieces into molten metal - Google Patents

Abstract

PURPOSE:To efficiently mix metallic fine pieces by forming good eddy stream in a mixing device for mixing the metallic fine pieces into molten metal. CONSTITUTION:An upper molten metal charging hole 9 at the upper side part and a lower molten metal discharging hole 10 at the lower part are formed in a mixing vessel 7 for molten metal. The mixing vessel 7 is formed to a reverse conical cylinder shape so as to become the large diameter at the upper part and the small, diameter as coming to the lower part. On the inner wall surface of the mixing vessel 7, a spiral introducing groove 11 is continuously formed without vertical gap from the upper molten metal charging hole 9 to the lower molten metal discharging hole 10. At the upper part of the mixing vessel 7, the charging hole 15 for the metallic fine pieces 12 is formed to charge the metallic fine pieces 12 on the eddy stream developed in the mixing vessel 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for regrinding metal such as aluminum or the like, and remelting metal pieces such as cut pieces of plate material.

[0002]

2. Description of the Related Art In the publicly known Japanese Patent Laid-Open No. 62-93318, an upper part of a conical cylindrical or spiral cylindrical molten metal mixing container having an upper inlet on the upper side and a lower outlet on the lower side. There is described an apparatus for forming a charging port for metal strips in the above, and thereby charging the metal strips from above into the swirling molten metal in the mixing vessel to mix the metal strips with the molten metal. Since the metal strip is lightweight, it is difficult to mix because it floats when it is poured into the molten metal, and therefore, it is an attempt to mix the metal strip into the molten metal by making the swirl molten metal and feeding the metal strip from above.

[0003]

The above-mentioned publication describes a spiral-shaped cylindrical mixing container into which metal strips can be charged as a swirling melt from above, but the specific structure thereof is not described. . If a conical cylindrical mixing container is formed with the upper inlet on the upper side and the lower outlet on the lower side, a vortex can be spontaneously generated, but the vortex appears only in the central part, It is difficult to form the distant portion, and the metal strips supplied near the outside are not easily mixed. Therefore, according to the present invention, the mixing container is formed into an inverted conical cylinder, and the inner wall surface is formed with a spiral guide groove that is continuously formed from the upper entrance to the lower exit, without any vertical gap, thereby forming a molten metal. The vortex flow is formed not only in the center of the inverted conical cylinder but also on the outer side, so that the material supplied near the outer side is promptly mixed.

[0004]

According to the present invention, a metal strip 12 is introduced into an upper portion of a molten metal mixing vessel 7 in which an upper inlet 9 is formed on an upper side and a lower outlet 10 is formed on a lower side to form a swirl. In the apparatus for forming the port 15 and thus introducing the metal strip 12 from above the swirling molten metal in the mixing vessel 7 to mix the metal strip 12 with the molten metal, the mixing vessel 7 has a large diameter in the upper portion and a small diameter in the lower portion. It is an inverted conical cylinder whose diameter becomes smaller as it goes up, and the inner wall surface of the metal strip 12 is formed with a spiral guide groove 11 formed continuously from the upper entrance 9 to the lower exit 10 with no vertical gap. This is a molten metal mixing device.

[0005]

An embodiment of the present invention will be described with reference to the drawings.
In FIGS. 1 and 2, 1 is a melting furnace, and the melting furnace 1
A pump chamber 3 communicating with a hole 2 formed in the melting furnace 1 is provided on the side of the pump chamber 3, and a pump 4 is provided in the pump chamber 3. Reference numeral 5 denotes a material charging chamber of the melting furnace 1, a mixing chamber 6 is provided in the vicinity of the material charging chamber 5, and an inverted conical cylindrical mixing container 7 is disposed in the mixing chamber 6 and the pump 4 is provided. A transfer pipe 8 for guiding the molten metal from the above to the upper side of the mixing container 7.
Is provided.

The inside of the mixing vessel 7 has an inverted conical shape with a large diameter at the upper part and a smaller diameter toward the lower part, and the inner wall surface is continuous from the upper hot water inlet 9 to the lower hot water outlet 10 without any vertical gap. The formed spiral guide groove 11 is formed. In addition, 12 is a metal strip, 13 is a supply hopper for the metal strip 12, 14 is a conveyor for transporting the metal strip 12 from the supply hopper 13 to the mixing container 7, 15 is an input port of the mixing container 7, and 16 is a lower outlet. It is a flow path from the sprue 10 to the material feeding chamber 5.

[0007]

[Operation] Next, the operation will be described. The material charged in the material charging chamber 5 is melted in the melting furnace 1 into molten metal, which is pumped up by the pump 4 in the pump chamber 3 and transferred by the transfer pipe 8
And is fed into the mixing container 7 from the upper side of the inverted conical cylindrical mixing container 7. The mixing container 7 has an inverted conical shape in which the upper part has a large diameter and the diameter decreases toward the lower part, and the upper and lower taps 9 and 10 are formed, so that a vortex flow naturally occurs at the center of the molten metal. The present invention provides the mixing container 7
Since the spiral guiding groove 11 is continuously formed on the inner wall surface from the upper entrance 9 to the lower exit 10, there is a spiral vortex not only in the central portion but also in the vicinity of the inner wall.

Since the metal strip 12 in the supply hopper 13 is supplied from above by the conveyor 14 during this vortex flow, the metal strip 12 of aluminum or the like, which tends to be supplied and float, is immediately irrespective of the outer peripheral portion of the central portion. It is entrained in the vortex and mixed with the molten metal, discharged from the lower tap hole 10, returned to the material charging chamber 5 through the flow path 16, melted in the melting furnace 1 and reused.

[0009]

As described above, if a conical cylindrical mixing container having an upper inlet on the upper side and a lower outlet on the lower side is formed, a vortex can be spontaneously generated, but the vortex is only in the central part. It is difficult to form a portion that appears remarkably and is far from the center, and the metal strips supplied near the outside are not easily mixed. According to the present invention, however, the upper inlet 9 and the lower outlet 10 are formed on the upper side and the inlet 15 for the metal strips 12 is formed on the upper portion of the molten metal mixing container 7 to form a vortex. In an apparatus for feeding metal strips 12 from above a swirling molten metal in a mixing vessel 7 to mix the metal strips 12 with the molten metal, the mixing vessel 7 has an inverted cone with an upper part having a larger diameter and a lower part having a smaller diameter. It is a molten metal mixing device for a metal strip 12 which is a cylindrical shape and has spiral guide grooves 11 continuously formed on the inner wall surface from the upper entrance 9 to the lower exit 10 without any vertical gap. Therefore, a vortex is generated not only in the central portion but also in the vicinity of the inner wall surface of the container 7 which is difficult to be formed.
Since the metal strip 12 is supplied from above by the conveyer 14 in this vortex, the metal strip 12 such as aluminum which is apt to be supplied and floated is immediately entrained in the vortex regardless of the center portion or the outer peripheral portion. It has the effect of mixing well with molten metal.

[Brief description of drawings]

FIG. 1 is an overall plan view of the present invention.

FIG. 2 is a vertical sectional side view of a main part.

[Explanation of symbols]

1 ... Melting furnace, 2 ... Hole part, 3 ... Pump chamber, 4 ... Pump, 5
... Material charging chamber, 6 ... Mixing chamber, 7 ... Mixing container, 8 ... Transfer pipe, 9 ... Upper tap, 10 ... Lower tap, 11 ... Induction groove, 12 ... Metal strip 12, 13 ... Supply hopper, 14 ... conveyor, 15 ... input port, 16 ... flow path.

Claims (1)

[Claims] 1. An upper molten metal inlet for forming a swirl by forming an upper molten metal inlet on the upper side and a lower molten metal outlet on the lower portion to form a metal strip charging inlet on the upper portion of a molten metal mixing vessel. In a device for charging metal strips from above and mixing the metal strips into the molten metal, the mixing vessel has an upper portion of a reverse conical cylinder having a large diameter and a lower portion having a smaller diameter, and the inner wall surface is A melt mixing device for metal strips, which has spiral guide grooves formed continuously from the upper entrance to the lower exit without gaps in the vertical direction.