JPH0247434Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a melting device for recycling aluminum powder or the like.

[Prior art]

In an aluminum reverberatory furnace, for example, there is a configuration in which the molten metal is taken out from the heating section, conveyed diagonally upward through an electromagnetic gutter, and then flowed down through a guide gutter into a well for introducing the powder to be melted (Japanese Patent Publication No. 57-27387). . In this configuration, when the molten powder is added to the molten metal flowing down into the reverberatory well, the amount of the molten powder mixed into the flowing molten metal is bathed in the molten metal in the well and comes into contact with the periphery of the molten powder. Melts from molten metal without coming into contact with outside air.

However, a part of the powder is suspended in the well without being mixed with the flowing molten metal.

[Problem that the invention attempts to solve]

The floating powder in the well section is
Since the surrounding area is heated while being exposed to the outside air, oxidation is promoted and becomes a cause of slag generation. This slag floats on the surface of the molten metal as an impurity, and it is necessary to take it out, but this work is extremely troublesome, and it becomes necessary to drain the molten metal from areas where the slag is floating, reducing the yield of the molten metal. There were some problems, such as:

[Means for solving problems]

The gist of the present invention is that the powder is supplied directly above or near the opening for the molten metal to flow down, which is formed in the vertical direction of the molten metal guide trough.

[Effect]

The molten metal flowing down from the vertical opening of the guide trough gets caught in the molten metal, and the molten metal is accurately bathed in the molten metal.

[Example] Hereinafter, the illustrated example will be specifically described. Figure 1 is Figure 3C, which shows the gist of the invention.
-C sectional view, Figures 2 and 3 are respectively a partially cutaway side view and a plan view of a reverberatory furnace implementing this invention, Figure 4 is a sectional view taken along line A-A in Figure 3, and Figure 5. is a sectional view taken along line B-B in FIG. 3. In Figures 2--5, 1 is a reverberatory furnace main body, which has an exhaust hole 1a, a heating part 1e, and a well part 1 for charging the metal to be melted.
b, and a pouring port 1c is formed on the side surface of the heating portion 1e located sufficiently inside the well portion 1b. Reference numeral 2 denotes a hot water storage tank, into which high-temperature molten metal M existing inside the heating section 1e of the reverberatory furnace 1 is guided through an opening 2a communicating with the molten metal inlet 1c. Reference numeral 3 designates an electromagnetic gutter, which includes an iron core 3a constituting an inductor, a moving magnetic field generating winding 3b provided on the iron core 3a, a bottom fireproof wall 3c disposed on the inductor, and side fireproof walls 3d1,
Consists of 3d2. The electromagnetic gutter 3 transports the molten metal M from the bottom of the hot water storage tank 2 to a level higher than the allowable maximum molten metal capacity level in the reverberatory furnace 1 on the side of the well 1b of the main body 1. 4 is a support leg for an electromagnetic gutter. 5 is a lid body that covers the upper part of the hot water tank 2 and the electromagnetic gutter 3. A guide gutter 6 guides the molten metal M flowing out from the upper end of the electromagnetic gutter 3 above the well portion 1b for introducing the metal to be melted, and causes the molten metal M to flow down into the opening 1b. A burner device 7 is provided on the furnace wall of the reverberatory furnace 1 on the opposite side from the well portion 1b, and radiates flame into the heating portion 1e of the reverberatory furnace 1.
Powerfully heats the molten metal M inside.

By the way, at the tip of the guide gutter 6, as shown in FIG. 1, there is an opening 1 through which the guided molten metal M flows down.
1 is formed in the vertical direction, and a feeder 13 is provided for supplying the dry powder 12 to the upper part of the opening 11. Reference numeral 14 denotes a grain powder accumulation tank, and the grain flour accumulated therein is cut out in appropriate amounts by the action of the feeder 13.

In the above configuration, a metal to be melted such as aluminum is first put into the heating section 1e of the reverberatory furnace 1 in the form of a lump, and is heated by the heat emitted from the burner device 7 into the heating section 1e of the reverberatory furnace 1. receive. In this process, a certain amount of molten metal M is accumulated in the reverberatory furnace, and a so-called seed metal (this may be poured into the furnace in the form of molten metal) is obtained.

Now, the high-temperature molten metal M is passed through the pouring port 1c and the opening 2a.
From the heating part 1e through the hot water tank 2 and the electromagnetic gutter 3
When AC power is applied to the winding 3b of the electromagnetic gutter 3 in a state where the electromagnetic gutter 3 is guided, a moving magnetic field in the direction of the arrow X shown in FIG. 1 is generated. As a result, the electromagnetic gutter 3 exerts a thrust force in the direction of the arrow X on the molten metal M within the range of the penetration depth of the magnetic flux. In other words, in the part of the bottom refractory wall 3c of the electromagnetic gutter 3 that is above the level of the molten metal in the reverberatory furnace 1, the thickness of the molten metal M is necessarily limited to the penetration depth of the magnetic flux, and there is no room for the molten metal M to go down. The liquid is strongly pulled up diagonally upward along the electromagnetic gutter and flows down into the well 1b through the vertical opening 11 formed in the guide gutter 6. At this time, an appropriate amount of grain powder 12 is cut out from the grain powder accumulation tank, and the cut grain powder falls into a circular thrust-shaped space formed in the flowing molten metal M. Therefore, the supplied powder is enveloped in the molten metal flowing down from the opening 11 and bathed in the well portion.

〔effect〕

As described above, the device for melting powder of the present invention allows the molten metal that has stored thermal energy to flow down through the vertical openings, and also supplies an appropriate amount of the powder to the holes. be. With this configuration, the powder to be dissolved is
Since it is bathed in the molten metal with the effect of being covered by the flowing molten metal M, it is melted without coming into contact with the outside air. Accordingly, the die powder to be melted has excellent features such as no oxidation, no generation of slag, and the ability to prevent a decrease in the yield of molten metal.

[Brief explanation of the drawing]

Fig. 1 is a sectional view taken along the line C-C in Fig. 3 showing the main parts, Fig. 2 is a partially cutaway side view, Fig. 3 is a plan view, and Fig. 4 is a sectional view taken along A-A in Fig. FIG. 5 is a sectional view taken along line BB in FIG. 3. 6... Molten metal guide path, M... Molten metal, 11... Hole, 12... Dry powder, S... Circular space.

Claims (1)

[Claims for Utility Model Registration] 1. In a configuration in which molten metal is generated by adding powder to be melted to the molten metal in a thermal energy absorbing state flowing down from the molten metal guide path, the molten metal outlet of the molten metal guide path is formed in a vertical direction. What is claimed is: 1. A device for dissolving grain powder, characterized in that it has an opening having a diameter of 100 mm, and a means for supplying grain powder directly above or in the vicinity of the opening. 2. The molten metal melting apparatus according to claim 1 of the utility model registration, characterized in that the molten metal in a state of absorbing thermal energy is obtained from a heating section of a reverberatory furnace and guided to a well section and allowed to flow down.