JPH0247435Y2 - - Google Patents

Description

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

[Conventional technology and its problems]

A reverberation furnace, traditionally known as an aluminum melting furnace, places a metal material such as an ingot or scrap on the hearth and heats the ceiling surface of the furnace with the combustion flame of a burner, irradiating the metal material with the radiant heat. However, since only the upper surface of the metal material is excessively heated, a large amount of oxide is generated and metal loss is large. In particular, materials that are bulky and have a small apparent specific gravity, such as chips of aluminum, have even greater metal loss. Conventionally, such chips have been melted by using a stirring bar to artificially settle the chips floating on top of the molten metal, but this process requires hard labor under harsh conditions. Therefore, improvement was desired.

[Means for solving problems]

Therefore, the present invention aims to provide a chip melting furnace that can regenerate aluminum chips with extremely little metal loss and without requiring any manual effort. A melting tank, a sludge removal tank, and a heating tank are formed adjacent to each other with a partition wall in between, and the melting tank has a vertical cylindrical shape, and the axial flow rotation forces the molten metal downward into the center of the melting tank. A communication port for guiding the washed-out molten metal to the slag removal tank is provided at the lower part of the partition wall between the melting tank and the sludge removal tank, and the sludge removal tank and the heating tank are connected to each other through the opening at the bottom of the partition wall. At the same time, a heat source is provided in the heating tank, and a communication port is provided at the top of the partition between the heating tank and the melting tank to circulate the molten metal in the heating tank to the top of the melting tank, and chips are introduced into the melting tank. It is characterized by the following.

[Effect]

The chips introduced into the melting tank settle into the molten metal due to the downward flow of the molten metal due to the rotational motion of the axial rotor, are dissolved, and circulated to the slag removal tank and the heating tank.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.
The melting tank 1, the slag removal tank 2, and the heating tank 3 are formed adjacent to each other with partition walls 4, 5, and 6 made of refractories in between.
The melting tank 1 has a vertical cylindrical shape, and one side of its upper end communicates with the heating tank 3 through a communication port 7 formed in the partition wall 6, and one side of its lower end is formed in the partition wall 4. It communicates with the sludge removal tank 2 through a communication port 8.
A rotating shaft 10 of a motor 9 is suspended from above at the center of the dissolving tank 1, and an axial flow rotating body 11 is provided at the lower end of the rotating shaft 10. The axial flow rotating body 11 has a plurality of evenly spaced openings, and when it is rotated in a predetermined direction by the drive of a motor, the molten metal in the melting tank 1 is forcibly pushed downward through the communication openings. 8 and is sent to the slag removal tank 2. An opening 12 is provided in the lower part of the partition wall 5 between the sludge removal tank 2 and the heating tank 3. 1
3 and 13 are radiant tube type heat sources provided in the heating tank 3, which are immersed in the molten metal accumulated in the heating tank 3 and heated to maintain sufficient fluidity of the molten metal. 14 is a chute that guides chips to be melted onto the melting tank 1; 15 is a heating tank 3;
This is a molten metal outlet provided on one side wall.

In the chip melting furnace configured in this way, when chips are introduced into the melting tank 1 from the chute 14, the high temperature molten metal that has flowed from the heating tank 3 through the communication port 7 is transferred to the melting tank. Since the chips are flowed downward by the rotation of the flow rotating body 11, the chips are caught up in the flow and settle into the dissolving tank 3. The chips are melted by heat transfer from the molten metal and enter the slag removal tank 2 through the communication port 8. In the slag removal tank 2, only lightweight slag is floated and separated. The molten metal flows from the slag removal tank 2 to the opening 1.
After passing through the communication port 7 and being guided to the heating tank 3 and receiving heat from the heat source 13 , it is circulated again to the melting tank 1 through the communication port 7 .

[Effect of idea]

As explained above in the embodiments, the chip melting furnace of the present invention uses the operation of the axial flow rotating body to create a downward flow of molten metal, entraining the chips and causing them to settle, which improves the working environment and reduces manual labor. It has remarkable effects such as improved yield with no metal loss and continuous melting, resulting in high productivity.

[Brief explanation of drawings]

The drawing shows one embodiment of the present invention.
The figure is a plan view, Figure 2 is a sectional view taken along the line X-X of Figure 1,
FIG. 3 is a sectional view taken along the Y--Y line in FIG. 1. 1...Dissolution tank, 2...Slag removal tank, 3...Heating tank,
4, 5, 6... Bulkhead, 7, 8... Communication port, 9...
Motor, 10...rotating shaft, 11... axial flow rotating body,
12...opening, 13...heat source, 14...shoot.

Claims (1)

[Scope of utility model registration request] A melting tank, a sludge removal tank, and a heating tank are formed adjacent to each other with a partition wall in between.The melting tank has a vertical cylindrical shape, and an axial flow rotating body for forcing the molten metal downward is located in the center of the melting tank. A communication port for guiding the washed-out molten metal to the slag removal tank is provided at the bottom of the partition between the melting tank and the sludge removal tank, and the sludge removal tank and the heating tank are communicated through the opening at the bottom of the partition. At the same time, a heat source was installed in the heating tank, and in order to circulate the molten metal in the heating tank to the upper part of the melting tank, a communication port was installed at the top of the partition between the heating tank and the melting tank, and chips were introduced into the melting tank. A chip melting furnace characterized by: