JPH0610784U - Furnace structure of melting furnace with pressurized hot water distributor - Google Patents

Abstract

(57) [Summary] [Purpose] The pressure of the bubbles contained in the molten material ingot etc. increased due to the heating accompanying the melting, the surrounding molten material began to melt and the pressure of the bubbles exceeded the force that contained the bubbles. Occasionally, an explosion occurs and the surrounding molten material is scattered. In addition, various liquids and solids adhering to the processed non-product return material, which is injected as a molten material, explodes or explosively burns and vaporizes immediately after the injection, causing the surrounding molten metal to be scattered. (EN) A furnace structure in which molten metal does not adhere to a heating element due to such an explosion and causes various obstacles. [Constitution] Welding material receiving zones separated by partition walls are arranged so as not to adhere to the heating element even if the surrounding molten metal scatters due to the explosion of bubbles in the molten material and the explosion of foreign matter brought in by the return material. . According to the present invention, it is possible to prevent the heating element or the heating element protection tube, which is the heating source of the melting furnace with a pressurized hot water distribution device, from being damaged or caused a failure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a furnace structure of a melting furnace with a hot water distribution device used in a factory that produces castings using molten metal.

[0002]

[Prior art]

 The conventional furnace structure of a melting furnace with a hot water distribution device is a structure in which a melting material is arranged on a melting deck as shown in Japanese Patent Publication No. 63-59790, and is heated and melted by a heating element which is a heat source in the upper part.

Alternatively, instead of using a melting deck, a structure of melting in a bath is used in which a molten material is directly charged into the molten metal stored and melted.

[0004]

[Problems to be solved by the device]

 In the case of melting by the conventional furnace structure, in the case of melting on the melting deck, the pressure of the bubbles trapped inside the molten material ingot etc. increases due to the heating accompanying the melting, the surrounding molten material begins to melt and the pressure of the bubbles causes the bubbles to form. When it exceeds the contained power, it becomes an explosion state and scatters the surrounding molten material.

In addition, in the case of melting in a bath, in addition to the above-described explosion, various liquids and solids attached to the processed non-product return material, which is injected as a molten material like the ingot, explodes or explodes immediately after being injected.・ Evaporates and scatters the surrounding molten metal.

When the molten metal adheres to the heating element that is the heating source due to such scattering, in a heating element without a protective tube, there is a leakage with the furnace body, troubles due to changes in the resistance value of the heating element surface, and electrothermal efficiency due to oxide film formation. Of the molten aluminum, especially in the case of aluminum melting furnaces, especially in the case of aluminum melting furnaces.・ Damage the protective tube or heating element itself from erosion. This invention makes it a technical subject to provide the furnace structure which eliminates these problems of the prior art.

[0007]

[Means for Solving the Problems]

 The present invention arranges the molten material receiving zone separated by the partition wall so as not to adhere to the heating element even if the surrounding molten metal is scattered due to the explosion caused by bubbles in the molten material, the explosion caused by foreign matter brought in by the return material, etc. did.

[0008]

[Action]

 FIG. 1 shows an embodiment of a furnace structure of a melting furnace with a pressurized hot water distributor according to the present invention, which will be described with reference to the drawings.

A molten material such as an ingot or a return material loaded on the charging device 2 by using a transportation means (not shown) is opened by opening a door (not shown) of the charging port 7 of the melting furnace 1 with a pressurized hot water distributor. It is charged into the molten material receiving zone 3 using the charging mechanism of the charging device 2 such as the cylinder 11. After that, when the molten metal is already stored in the furnace, it is melted by receiving heat from the radiant tube heater 6 which is a heating source through the stored molten metal. When the molten metal is not stored, it is melted by receiving heat from the radiant tube heater 6 and from the furnace material such as the furnace wall / hearth that has been red-heated or directly from the radiant tube heater 6 by conduction / convection / radiation heat transfer. Further, at this time, even if the molten metal is scattered due to various factors, the partition wall 13 prevents the molten metal from directly adhering to the radiant tube heater.

[0010]

【Example】

 FIG. 1 shows an embodiment of a furnace structure of a melting furnace with a pressurized hot water distribution device according to the present invention. Since the melted melt penetrates the lower part of the partition wall 13 and shares the entire hearth. The molten material is spread over the entire area from the receiving zone 3 to the hot water distribution zone 5 via the heating zone 4 and stored. Then, in the melting furnace with a pressurized hot water distributor 1, the molten material 10 is automatically and continuously supplied from the charging device 2 based on preset temperature and melting control conditions, and heat is supplied from the radiant tube heater 6 as a heating source. The supply is controlled and the dissolution is continued.

The melting is carried out by continuing to supply the molten material 10 from the charging device 2 to the extent that it does not cause excessive melting above the molten metal full line 12. Further, after the melt amount reaches the melt full line 12, heating is controlled so that the melt temperature does not become excessive.

When a request for distributing molten metal in the melting furnace with a pressurized hot water distributor 1 is issued from a hot water distribution equipment, which is a separate equipment (not shown), the pressure from a pressure source (not shown) is fed into the furnace. Pressurized by gas, the molten metal in the furnace flows into the hot water intake port 15 of the hot water pipe 9 attached to the hot water pipe mounting port 19 of the hot water distribution zone 5, and then flows from the hot water distribution port 14 to the hot water distribution facility. To be done.

[0013]

[Effect of device]

 As described above, according to the present invention, it is possible to prevent the heating element or the heating element protection tube, which is the heating source of the melting furnace with a pressurized hot water distributor, from being damaged, and from causing an obstacle such as an electric leak with the furnace body. Became.

The structure of the present invention was realized by the inventors in the course of research for solving the problems derived from the melting furnace with a pressurized hot water distribution device. This is a highly versatile structure that can be applied as a general structure to all melting furnaces that use an electric heating element provided above the furnace body, other than the closed structure melting furnace.

In the furnace structure of the present invention, the penetrating structure of the partition wall 13 provided between the molten material receiving zone 3 and the heating zone 4 may be about 100 mm above the level of the molten metal full line 12 in terms of height. .

[Brief description of drawings]

FIG. 1 is an embodiment of a furnace structure of a melting furnace with a pressurized hot water distribution device according to the present invention, (A) is a conceptual diagram when a molten material is charged using an automatic automatic charging device for the molten material, (B) ) Is a vertical sectional view from the molten material receiving zone to the heating zone, (C) is a horizontal sectional view at the radiant tube heater mounting level, and (D) is a vertical sectional view from the hot water distribution zone to the heating zone. ,
(E) is a horizontal sectional view at the level of the inlet.

[Explanation of symbols]

1 Melting furnace with pressurized hot water distributor. 2 Dedicated automatic loading device. 3 Molten material receiving zone. 4 heating zone. 5 Hot water distribution zone. 6 Radiant tube heater. 7 Input port. 8 Cleaning mouth. 9 Hot water distribution pipe. 10 molten material. 11 Input cylinder. 12 Full line of molten metal. 13 partitions. 14 Hot water outlet. 15 Suction mouth. 19 Hot water distribution pipe mounting port. The same reference numerals indicate similar relationships, and the hatched portion in the drawing indicates the refractory cross section.

Claims (1)

[Scope of utility model registration request] 1. A molten metal, which is melted and stored from a molten material in the furnace, is distributed to the outside of the furnace by using a heating element such as a radiant tube heater as a heat source and pressurizing the inside of the furnace having a closed structure with an external gas pressure source. In the melting furnace with a pressurized hot water distribution device, a partition wall having a gap that allows the gas in the furnace to come and go from the molten metal full line adjacent to the inlet of the molten material charged from the outside and stored after the molten material is melted The melted material receiving zone divided by the above, the melted material receiving zone and the molten metal separated and melted by the partition wall and stored in the furnace are adjacent to the position where the gas inside the furnace can come and go through the penetrating portion of the partition wall and above the radiant. A heating zone that has a heat source such as a tube heater and has a cleaning port for cleaning dirt and oxides on the surface of the molten metal and the wall surface, and the inlet is immersed in the molten metal stored in the furnace and the distribution port is outside the furnace. A hot water distribution zone having a hot water distribution pipe attached so as to be positioned, and is composed of a hot water distribution zone adjacent to the heating zone and connected through the melt receiving zone and the heating zone. Furnace structure characterized by that.