JPH11311482A - Metal melting and retaining furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain improved molten metal and improve heating efficiency by heating and melting a metal material by the flame of a combustion gas. SOLUTION: The axial center of an auxiliary burner 21 being provided in a dissolution chamber 20 is arranged in a normal line shape toward an inner surface 10a of a throwing port 10, and the flame of the combustion gas of the auxiliary burner 21 passes through the inside of the throwing port 10 and is delivered to the atmosphere side. A main burner 32 is brought closer to the melting chamber 20 and is arranged vertically on a top part 2 of a furnace body 1, and the flame of the main burner 32 hits against the hot water surface of the molten metal in a retaining chamber 30 and is directed rapidly toward the side of the melting chamber 20. The flame of the combustion gas of the main burner 32 and that of the combustion gas of the auxiliary burner 21 are guided downward of the throwing port 10 from two directions in an orthogonal shape as indicated by arrow lines (x) and (y), thus heating and melting metal materials that are piled up in the throwing port 10 due to the flame of the combustion gas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal melting and holding furnace for melting a metal material such as aluminum and maintaining the resulting molten metal at a constant temperature.

[0002]

2. Description of the Related Art This type of metal melting and holding furnace is disclosed in
No. 3,1993, for example. In this type of furnace, the combustion exhaust gas from the melting burner heats the material stacked in the tower-shaped high preheating chamber and is discharged outside the furnace, and the main purpose is to maintain the temperature of the molten metal in the holding chamber. The combustion exhaust gas of the burner is configured to be guided into the preheating chamber.

[0003]

In the above-mentioned conventional metal melting and holding furnace, the metal material is preheated and melted by the combustion exhaust gas of the main burner dedicated to melting, and the flame of the combustion exhaust gas and the holding burner are used. The frame of the combustion exhaust gas is guided from the same direction to the preheating chamber to heat the metal material. As a result, the metal material is locally heated from one direction, resulting in a large amount of metal oxide. In addition, since the metal oxide flows into the wide holding chamber and covers the entire surface of the molten metal, the heat of the holding burner is less likely to be transmitted to the molten metal, and the heat efficiency of the furnace is not necessarily good.

[0004] It is an object of the present invention to irradiate the flame of the combustion gas of the main burner and the auxiliary burner from different directions to the metal material of the material to be melted to uniformly heat and melt the metal material.
An object of the present invention is to provide a metal melting and holding furnace which is excellent in heat efficiency while obtaining a high quality molten metal.

[0005]

In order to achieve the above object, a metal melting and holding furnace according to the present invention comprises a charging port for charging a metal material to be melted, and an auxiliary port disposed at a lower portion of the charging port. A melting chamber provided with a burner, and an inlet through which the metal material heated and melted in the melting chamber flows, and a main burner for heating and melting the metal material and keeping the temperature of the molten metal in the chamber is provided. A metal melting and holding furnace having a holding chamber and a combustion gas frame of the main burner and a combustion gas frame of the auxiliary burner arranged in close proximity to the melting chamber. , And are configured to be heated and melted by the flame of the combustion gas.

In the metal melting and holding furnace according to the first aspect of the present invention, it is preferable that the combustion gas frame of the main burner and the combustion gas frame of the auxiliary burner are provided so as to be orthogonally guided to the inlet from two directions.

[0007]

The combustion gas frames of the main burner and the auxiliary burner are different from each other (two orthogonal directions).
The metal materials stacked in the inlet are almost uniformly heated and melted by the combustion gas flames. Since the metal material is entirely heated from different directions by the flame of the combustion gas, it is not locally heated, high-temperature oxidation is suppressed, and the generation of metal oxides is reduced.

According to this metal melting and holding furnace, the flame of the combustion gas of the main burner and the auxiliary burner is applied to the metal material to be melted from two different directions to heat and melt the metal material almost uniformly. By doing so, a high-quality molten metal can be obtained, and the effect that the thermal efficiency of the furnace is improved is produced.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a cross-sectional plan view of the metal melting and holding furnace, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG.
FIG. 4 is a cross-sectional view taken along line B.

[0010] The metal melting and holding furnace F shown in the figure is for melting a metal material to be melted such as aluminum and keeping the resulting molten metal m at a constant temperature. A furnace body 1 made of refractory bricks has an inlet 10 for charging a metal material.
A melting chamber 20 provided with an auxiliary burner 21 disposed toward the lower part of the inlet 10, and an inflow port 31 into which the metal material heated and melted in the melting chamber 20 flows. And a holding chamber 30 provided with a main burner 32 for heating and melting the molten metal m in the room.

The inlet 10 is formed in the shape of a square vertical hole having a certain height by protruding the top portion 2 of the furnace body 1 slightly upward, and is disposed immediately above the melting chamber 20 to be described later. The inlet 10 is provided to have a function of a preheating chamber for preheating a metal material.

An auxiliary burner 21 provided in the melting chamber 20
The axis of the insertion port 1 is viewed from a plane as shown in FIG.
The combustion gas frame of the auxiliary burner 21 is disposed so as to pass through the inlet 10 and be discharged to the atmosphere side. 23
Reference numeral denotes a lid for closing the inspection port 22 provided on the front side of the melting chamber 20.

The main burner 32 is disposed vertically on the top part 2 of the furnace body 1 close to the melting chamber 20, and
The second frame is provided so as to hit the surface of the molten metal m in the holding chamber 30 and then quickly proceed to the melting chamber 20 side. Thus, the flame of the combustion gas of the main burner 32 and the flame of the combustion gas of the auxiliary burner 21 are guided below the inlet 10 from two directions orthogonally as indicated by arrows x and y. And the metal materials stacked in the inlet 10 are heated and melted by the flames of the combustion gas. 33 is the holding room 3
An inspection port 34 for performing maintenance and inspection work 0 is a lid for closing the inspection port 33.

The heating and melting of the metal material is carried out mainly by using the main burner 32.
1 compensates for about 20 to 30% of the shortage of the heating energy of the main burner 32, and the two burners 32 and 21 are provided so as to control and mutually heat and melt the metal material efficiently and uniformly.

The metal melting and holding furnace has a structure in which a metal material is heated and melted almost uniformly by a main burner and an auxiliary burner, so that a high-quality molten metal can be obtained and the thermal efficiency of the furnace can be improved. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view of a metal melting and holding furnace.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 1;

[Explanation of symbols]

F → Metal melting holding furnace m → Molten 1 → Furnace body 10 → Inlet 20 → Melting chamber 21 → Auxiliary burner 30 → Holding chamber 31 → Inlet 32 → Main burner

Claims (2)

[Claims] An inlet for charging a metal material to be melted, a melting chamber provided with an auxiliary burner disposed toward a lower portion of the inlet, and a metal material heated and melted in the melting chamber. A holding chamber provided with a main burner for heating and melting the metal material and keeping the temperature of the molten metal in the room. The combustion gas frame of the main burner and the combustion gas frame of the auxiliary burner are provided so as to be respectively guided below the inlet from different directions, and the metal material is formed by the combustion gas frames. A metal melting and holding furnace configured to heat and melt. 2. The combustion gas frame of the main burner and the combustion gas frame of the auxiliary burner are provided so as to be guided orthogonally to the inlet from two directions. Metal melting and holding furnace.