JPS6195765A - Device for supplying molten aluminum - Google Patents

Abstract

PURPOSE:To discharge a molten metal while a holding furnace is held stationally without tilting the furnace by communicating successively and providing a melting chamber, holding chamber, degassing chamber, filtering chamber and storing chamber via partition walls to the furnace body. CONSTITUTION:The respective chambers are communicated with through-holes 8 bored to the partition walls 7. The melting chamber 2 and the holding chamber 3 have heating devices 9, 10 and open/shut ports 11, 12. A gas generating device 13 is installed to the floor of a degassing chamber 4 and an electromagnetic pump is provided to the storing chamber 6. A solid blank material of aluminum is charged into the chamber 2 and is melted in said chamber. The molten material is admitted into the chamber 3 where the material is formed to a prescribed alloy. The alloy is admitted into the degassing chamber 4 where an inert gas is blown to the molten metal to remove the gas and inclusions in the molten metal. The refined molten metal is stored in the chamber 6 through a filtering chamber 5 and an electromagnetic pump 14 is driven to supply the molten metal through a supply path 15 to the prescribed point. The molten metal is set at the prescribed set value if a desired flow rate value is stored in a control device 17.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for melting aluminum into a predetermined alloy and supplying a refined molten metal to, for example, a casting machine.

[Technical background of the invention and its problems]

Conventional equipment of this type transfers the molten metal obtained in the melting furnace to a holding furnace, removes gas while turning it into a predetermined alloy in the holding furnace, tilts the holding furnace to drain the molten metal, and guides it in a bucket. During this process, it is filtered through a filter before being supplied to the casting machine. Therefore, the main problem with the conventional apparatus is that the holding furnace is tilted. In other words, the tilting amount of the holding furnace is adjusted according to the amount of molten metal required by the casting machine to obtain the required amount of melt, but this adjustment depends on the intuition of a skilled engineer and requires many years of experience. In order to further tilt the system, a large tilting device is installed underground, which requires ensuring safety and presents economical problems such as increased equipment costs. Slag and degassing were performed in the octopus holding furnace, which was done manually using a jig.

In addition, since each flight is set up independently,
It is necessary to move the molten metal, and during that time it comes into contact with air, resulting in lower quality and lower yield.

[Purpose of the invention]

This invention was developed to solve the above-mentioned conventional problems, and its main purpose is to allow the molten metal to flow out while the holding furnace remains stationary without tilting. This is because heat dissipation is reduced, the installation area of the device can be reduced, and high-quality molten metal can be supplied.

[Summary of the invention]

In order to achieve the above object of the present invention, a melting chamber, a holding chamber, a degassing chamber, a filtration chamber, and a storage chamber are provided in the furnace body separated by a partition wall, and each chamber is sequentially communicated with the melting chamber and the holding chamber. It was equipped with a heating device using a burner, a gas generator on the floor of the degassing chamber, and an electromagnetic pump capable of pumping molten aluminum into the storage chamber.

The necessary molten metal can be supplied by controlling the electromagnetic pump, but this control is done manually or automatically, so in order to automate it, in addition to the above configuration, it is necessary to set the detected flow rate and the required amount. The electromagnetic pump is equipped with a feedback control device that gives commands based on the deviation from the value.

[Embodiments of the invention]

As shown in FIGS. 1 and 2, a melting chamber 2 is provided in a furnace body 1.
, a holding chamber 3, a degassing chamber 4, a filtration chamber 5, and a storage chamber 6 are arranged through a partition wall 7, and the degassing chamber 4. The ceilings of the filtration chamber 5 and the storage chamber 6 are formed lower than the ceilings of the dissolution chamber 2 and the holding chamber 3. Further, the dissolution chamber 2 and the holding chamber 3 are connected through a through hole 8 made in the partition wall 7, and the holding chamber 3 is connected in the same way.
and the degassing chamber 4, the degassing chamber 4 and the filtration chamber 5, and the filtration chamber 5 and the storage chamber 6, respectively. However, instead of using the through hole 8, although not shown, communication may be provided by a tap device including a tap hole and a stopper.

The melting chamber 2 and holding chamber 3 have heating devices 9, 10 using burners and opening/closing ports 11, 12 as in the conventional case. A gas generator 13 is installed on the floor of the degassing chamber 4,
The gas generator 13 has a blower made of fireproof material and having numerous pores attached to the end of a pipe (not shown) that guides inert gas (nitrogen gas) by a pump (not shown). Filtration is similar to conventional ones. Next, an electromagnetic pump 14 is provided in the storage chamber 6, and a molten metal supply path 15 is connected thereto by a pipe extending from the pump 14. The electromagnetic pump 14 has a coil wound around the outer circumference of a ceramic duct. By passing a three-phase current through the coil, a moving magnetic field is generated in the duct, which causes an induced current to flow through the molten aluminum, driving the molten metal. Discharge pressure is obtained by generating force, and the discharge pressure is changed by the voltage applied to the coil.

Furthermore, an electromagnetic flowmeter 16 is provided in the supply path 15, and the electromagnetic flowmeter 16 is based on Faraday's law of electromagnetic induction by J! The supply path 15 is formed of a conductive pipe, the pipe is sandwiched between the poles of a magnet, and the pipe is provided with electrodes perpendicular to the direction of the magnetic field of the magnet, so that the molten metal crosses the magnetic field. When the molten metal flows, an electromotive force proportional to the flow velocity of the molten metal is induced in the molten metal, and the flow rate is measured based on the induced output. The electromagnetic pump 14 is controlled by a feedback control device 17 that outputs a deviation signal between the detected value of the flow rate and a desired set value. Reference numeral 18 in FIG. 1 is a distributor of an aluminum casting machine, and an electromagnetic level gauge 19 is installed in this distributor.

According to the above-described embodiment of the present invention, a solid aluminum material is charged into the melting chamber 2 and melted, and the molten metal flows into the adjacent holding chamber 3, where it is formed into a predetermined alloy and then desorbed. It flows into the gas chamber 4, where an inert gas is blown into the molten metal as fine bubbles from a blower to remove gas and inclusions in the molten metal, and then passed through a filtration chamber 5 to a storage chamber 6 where the purified molten metal is stored. It will be done. At this point, the electromagnetic pump is driven, and from this, the water is supplied to a predetermined location via a supply path. Furthermore, if a desired flow rate value is stored in the control device, the discharge amount of the electromagnetic pump is controlled and always supplied at a predetermined set value. Note that the flow to each chamber is due to the suction force of the electromagnetic pump.

〔Effect of the invention〕

According to the molten aluminum supply apparatus according to the present invention, one furnace body includes a melting chamber, a holding chamber, and a degassing chamber.

Since the filtration chamber and storage chamber are separated by a partition wall, the amount of heat released to the outside air is greatly reduced compared to conventional independent furnaces, promoting energy conservation. Since there is less direct contact with the metal and degassing is performed reliably, high-quality molten metal can be produced with a reduced yield. Furthermore, since the holding chamber is of a fixed type, equipment costs for the furnace are dramatically reduced. Furthermore,
Since the molten metal is discharged from the storage chamber using an electromagnetic pump, the discharge amount can be controlled reliably, and the electromagnetic pump does not have electrical equipment such as electrodes that come into direct contact with the molten metal, so there is no mechanical operation. It has a low failure rate and can withstand the high temperatures of molten aluminum.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a molten aluminum supply apparatus according to the present invention viewed from the top, and FIG. 2 is a sectional view similarly shown from the front. 1... Furnace body, 2... Melting chamber, 3... Holding chamber, 4...
... Degassing chamber, 5... Filtration chamber, 6... Storage chamber, 7.
... Partition wall, 9°10... Heating device, 13... Gas generator, 14... Electromagnetic pump, 15... Supply path,
16...Electromagnetic flowmeter, 17...Feedback control device 11w1 Procedural amendment (voluntary) November 8, 1980 1. Indication of incident Patent application No. 217848 of 1981 2. Title of invention Molten aluminum supply Device 3, person making corrections

Claims (1)

[Claims] 1) Inside the furnace body 1, an aluminum melting chamber 2, a holding chamber 3, a degassing chamber 4, a filtration chamber 5, and a storage chamber 6 are connected to each other through a partition wall 7, and each chamber is sequentially communicated. Molten aluminum characterized in that the melting chamber 2 and the holding chamber 3 are equipped with heating devices 9 and 10, the floor of the degassing chamber 4 is equipped with a gas generator 13, and the storage chamber 6 is equipped with an electromagnetic pump 14. Feeding device. 2) In the furnace body 1, an aluminum melting chamber 2, a holding chamber 3, a degassing chamber 4, a filtration chamber 5, and a storage chamber 6 are provided, respectively, through a partition wall 7, and the chambers are connected to each other in sequence, and the melting chamber 2 The holding chamber 3 is equipped with heating devices 9 and 10, the floor of the degassing chamber 4 is equipped with a gas generator 13, and the storage chamber 6 is equipped with an electromagnetic pump 14.
Molten aluminum characterized in that the electromagnetic pump 14 is provided with a feedback control device 17 that gives commands based on the deviation between the detected value of an electromagnetic flow meter 16 provided in the supply path 15 of the molten metal discharged from the pump and the flow rate setting value. Feeding device.