JPS6021819B2 - pouring furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a hot water storage chamber whose upper part is sealed and a hot water exit path that rises from the bottom of the hot water storage chamber and exits at a position higher than the molten metal surface of the hot water storage chamber. The present invention relates to a pouring furnace in which the molten metal is injected, the molten metal surface is pushed down by the pressure, the molten metal is poured out from the flaw channel, and the air in the upper part of the flaw storage chamber is exhausted to stop the melt tapping.

In Western-style hot water furnaces, where compressed air is used to press the hot water directly to tap the mold, new air is injected into the hot water storage chamber each time hot water is tapped, so the oxygen in the air constantly oxidizes a large amount of molten metal, creating slag. or the composition of the molten metal may change significantly.

Furthermore, as mentioned above, when air is used, oxidation occurs, so there are injection furnaces that use inert gas, but these have the disadvantage that they are expensive to operate because inert gas is expensive. The object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a western-style hot water furnace that causes less oxidation in the setting sun, less changes in the components of the molten metal, and is inexpensive to operate.

According to the present invention, the above-mentioned object is provided with a hot water storage chamber whose upper part is sealed and an outlet passage which rises from the lower part of the hot water storage chamber and closes to the atmosphere at a position higher than the molten metal surface of the moat storage chamber. In pouring furnaces, compressed air is injected into the upper part, the pressure pushes down the surface of the molten moat, and the hot water is discharged from the tap passage. A high-pressure tank is provided through an exhaust valve, a low-pressure tank is provided through an exhaust valve, a compressor is provided that sucks and compresses air from the low-pressure tank, and sends the air under pressure to the high-pressure tank, and the low-pressure tank is opened to the atmosphere through an electromagnetic valve. It is made possible by the Western-style burner, which is characterized by .

Embodiments of the present invention will be described below with reference to the drawings.

The figure is a schematic diagram of an infusion furnace according to an embodiment of the present invention. The furnace body 1 is made of refractory material, and has a moat storage chamber 2, an outlet passage 3, and an inlet passage 4 formed therein. The upper part of the hot water storage chamber 2 is normally sealed with a lid 5 made of a refractory material. The hot water outlet path 3 rises from the lower part of the moat storage chamber 2 and closes to the atmosphere outside the furnace body 1 at a position higher than the molten metal surface 7 of the falling sun 6 in the hot water storage chamber 2. The inlet channel 4 also rises from the lower part of the storage chamber 2 and closes to the atmosphere outside the furnace body 1 at a position higher than the outlet moat channel 3. The molten metal 6 sent from the hot water inlet path 4 is stored in the storage chamber 2. In this injection furnace, compressed air from a high-pressure tank 8 is adjusted in pressure by a control device 9 and then sent to the upper part of the flaw storage chamber 2. This compressed air pushes down the molten metal surface 7 in the hot water storage chamber 2, and Ayayu 6 is extruded from 3, and the ayayu is poured into the mold. Further, the control device 9 stops the supply of compressed air, and the exhaust valve 10 exhausts the air in the upper part of the hot water storage chamber 2 to the low-pressure tank 11, thereby stopping hot water dispensing. Air from the low pressure tank 11 discharged from the upper part of the hot water storage chamber 2 passes through a cooler 12, a drain separator 13, and a filter 14, and reaches a compressor 15. The air that has reached the compressor 15 is compressed and sent to the high-pressure tank 8 through the cooler 16, and is again injected into the upper part of the storage chamber 2 for tapping by the control device 9. The high pressure tank 8 is provided with a pressure switch 17 that starts the compressor 15 when the pressure becomes lower than a set value and stops the compressor 15 when the pressure becomes higher than the set value. The low pressure tank 11 is also provided with a pressure switch 18 and an electromagnetic valve 19 that allows atmospheric air to flow into the low pressure tank 11 when the pressure switch 18 detects a pressure below a set value. In the pouring furnace according to the present invention described above, the oxygen in the air sent into the moat storage room oxidizes the molten metal and disappears at the beginning of operation, and after that, new air containing oxygen is used to replenish the leakage. Only a small amount of water flows into the valve 19.

Therefore, the molten metal undergoes considerable oxidation and compositional changes. In other words, the fluid circuit forms a fluid control circuit for tapping and stopping the tap, and also forms an air inertization device integrally with the furnace. Further, the feeding of compressed air to the hot water storage chamber for hot water dispensing and the exhausting of hot water for stopping hot water dispensing are performed by a high pressure tank or a low pressure tank, respectively. Therefore, if the capacity of both tanks is made sufficient, it is not necessary to run the compressor every time hot water is dispensed or stopped, and it is possible to run the compressor during standby time to significantly reduce the capacity of the compressor. can. Further, in order to replenish air leakage, there is no need for a special air machine such as a separate compressor between the fluid circuit and the atmosphere, and it is sufficient to simply open the solenoid valve 19. Doesn't necessarily require driving.

[Brief explanation of drawings]

The figure is a schematic diagram of an infusion furnace according to an embodiment of the present invention. 2...Wound storage chamber, 3...Wound exit path, 7...
... Rakuyo mask.

Claims (1)

[Claims] 1 Equipped with a hot water storage chamber whose upper part is sealed and a hot water outlet that rises from the bottom of the hot water storage chamber and opens to the atmosphere at a position higher than the molten metal surface in the hot water storage chamber. Compressed air is injected into the upper part of the hot water storage chamber and the molten metal surface is heated by the pressure. In a pouring furnace that taps hot water through a push-down tap path and stops tapping by discharging the air above the hot water storage chamber, a high-pressure tank is connected to the top of the hot water storage chamber via an injection pressure control device, and a low-pressure tank is connected to the top of the hot water storage chamber via an exhaust valve. A pouring furnace comprising: a compressor for sucking and compressing air in the low-pressure tank and feeding the compressed air to the high-pressure tank; and the low-pressure tank is opened to the atmosphere via a solenoid valve.