JPS581356B2 - Kinzokuyoukaihouhou Narabini Souchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION During metal melting, the present invention enables rapid melting of the material by forcibly circulating the molten metal in the sump through the material to be melted in the melting section. The present invention relates to a metal melting method and apparatus for producing reflux in the molten metal and making the temperature distribution of the molten metal uniform.

Conventionally, heating methods such as convection heating, radiation heating, and jet impact heating have been used in combustion-type pot melting furnaces, etc., but molten metal has not been used to melt the same material. .

In the present invention, molten metal is poured from above the charged material to be melted using a molten metal transport device such as a mechanical molten metal pump, an electromagnetic pump, or a gas pressure transport device, and the material is melted into a liquid phase. This is promoted by heat transfer and also prevents oxidation of the material to be melted.

Next, the details of the melting furnace shown in the figure will be explained as an example. 1 is a material charging port, 2 is a preheating tower, 3 is a melting section having an inclined floor surface, 4 is a burner, 5 is a sump section, and 6 is an auxiliary The burner 7 is a flue, and the melting material A is charged almost continuously from the charging port 1, and as it passes through the preheating tower 2, it is preheated by exhaust gas and reaches the melting section 3, where it is melted by the burner 4. The water flows into the reservoir 5, and is heated to and maintained at a predetermined temperature by the auxiliary burner 6.

Reference numeral 8 denotes a molten metal transport path which is connected at one end to the bottom of the sump 5 and whose other end opens 9 at the top of the furnace melting section 3, and at an appropriate position there is a molten metal transport device, such as a conductive electromagnetic type using an electrode. A pump 10 is provided.

11 is a transportation channel opening/closing valve, and 12 is an outlet.

When an appropriate amount of molten metal has accumulated in the sump 5, the on-off valve 11 is opened and the electromagnetic pump 10 is operated to pour the high temperature molten metal in the sump onto the material to be melted in the melting section 3.

The poured molten metal passes through the sloped floor of the melting section together with the newly melted material and returns to the sump 5, and this operation is repeated.

Conventionally, when melting materials with a large surface area, such as die powder generated in machine factories, etc., the oxidation loss due to burners, etc. is extremely large, but as mentioned above, bulky molten metal is poured onto the surface to melt the surface. By covering the material, its oxidation can be greatly reduced, and furthermore, the temperature of the material can be rapidly increased by liquid phase heat transfer between the poured molten metal and the material, and the melting can be significantly promoted.

Further, the molten metal B in the sump 5 circulates through the transport path 8, the melting section 3, etc., and therefore the temperature of the molten metal in the furnace becomes uniform very quickly.

[Brief explanation of drawings]

The drawings show one embodiment of the device of the present invention, with FIG. 1 being a cross-sectional plan view and FIG. 2 being a vertical cross-sectional side view.

Claims (1)

[Scope of Claims] 1. A method for melting metal, characterized in that during metal melting, molten metal in a pool is poured onto the material to be melted in the melting part, and the molten metal is allowed to flow back into the pool. . 2. A material charging port, a melting section for the material charged from the charging port, a sump into which the material melted in the melting section should flow, and a molten metal in the sump into the melting section. A metal melting apparatus characterized by comprising a molten metal transport device for pouring molten metal onto a certain material to be melted.