JPH03199324A - Method and device for rapid melting by cold supply of aluminum ingot - Google Patents

Abstract

PURPOSE:To make heating devices to a single device and to save a molten metal moving device, such as electromagnetic pump, by using a turnable hollow pipe furnace of a horn type formed integrally and continuously with a melting area and a heating up area as a melting furnace and providing a heating device which is rotatable and relatively movable therewith. CONSTITUTION:Al ingots 20 are dropped from an open end 12 at the inlet of a melting/ heating up furnace 11 along the inclined base of a pipe leg part 11a to an inserting/ melting area Y and are melted by a melting/heating up coil 16. The generated molten metal is passed through the fine grooves of a flow regulating plate 15 and the position of the coil 16 is moved axially along the outer periphery of the pipe leg part 11a at need. The coil 16 is moved to a heating up/pouring area S and the molten metal in a molten metal pool is heated up when the amt. of the molten metal measured by a load cell C attains a prescribed amt. The furnace 11 is turned in the direction 3 around the longitudinal axial center to direct an opening end 14 of the pipe leg part 11b downward at a suitable angle to pour the molten metal. The furnace 11 is then turned in a direction A and is returned to the posture at the time of melting.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a method and apparatus for rapidly melting aluminum or aluminum alloy (hereinafter referred to as aluminum-based metal) ingots, and more specifically to a method and apparatus for rapidly melting aluminum or aluminum alloy (hereinafter referred to as aluminum-based metal) ingots, and more specifically to a method and apparatus for rapidly melting aluminum or aluminum alloy (hereinafter referred to as aluminum-based metal) ingot. When molding aluminum into parts for machinery, electrical equipment, etc. by die casting, aluminum-based metal ingots (hereinafter referred to as aluminum ingots) are formed immediately before the pouring slot of the die of the die-casting machine or the pouring port of other casting equipment. One or two of these are directly melted by induction heating, which is the so-called cold material insertion melting method, and the melt is made to flow down to a temperature rising area to form a molten metal, which is then heated to a predetermined temperature on the spot and placed inside the die of a die casting machine, etc. This invention relates to a rapid melting method and device for pouring molten metal into a liquid.

[Prior Art] Aluminum has the characteristics of low specific gravity and low melting point when used as structural members for general machinery, special machinery, vehicles, electrical equipment, etc., and if it is made into an alloy, it can be made to have considerable strength. It is widely used as wrought material and cast products because of its ability to

In addition to regular molds and sand castings, die castings, shell-type castings, and centrifugal castings are also used for casting products. Among these, the die-casting method uses a die-casting machine (also called a die-casting machine) to produce molten metal. It is possible to make precision castings by repeatedly injecting into a mold called a die under high pressure and at high speed, so it is being used more and more because it meets the requirements for dimensional accuracy and productivity. ing.

However, in general, in order to supply molten metal to a die-casting machine, as shown in Fig. 3, a large amount of molten metal is heated to 570 to 600°C by intensive melting in a melting furnace 31 using gas or heavy oil as a heat source. Holding furnace 3 that uses heavy oil as a heat source
2 and held for a long time, and then transferred to a hand furnace 34 by means of transportation such as a trolley 33, and is suitable for pouring.
This method follows the method of raising the temperature to 20° C. and feeding it into the die-casting machine 36's goose slot 37 by one person or by a robot 35 or the like.

[Problems to be Solved by the Invention] However, such a method involves a large-scale work process that uses multiple furnaces, so it requires a large factory space and requires long hours of work using multiple furnaces. Since the material is kept in a molten state and transported between multiple furnaces, the material yield is low due to losses such as combustion, oxidation, and scattering, and there is also a large amount of energy loss due to waste heat and heat radiation. It was uneconomical in terms of

In addition, there were many steps involved in transporting, storing, and pumping out molten metal, resulting in low work efficiency, as well as concerns about safety and poor working conditions.

Furthermore, since it takes a long time to heat up a large-capacity furnace to a predetermined temperature, there was a need for a solution to problems related to working conditions, such as the need for melting workers to be dispatched early.

In order to solve the problems with the above-mentioned molten metal supply apparatus that uses a large-capacity melting furnace, intermediate holding furnace, hand furnace, etc., the inventor of the present invention has made it possible to transfer aluminum ingots to die-casting machine ties or other casting machines. The idea was to adopt a cold material rapid melting method in which the molten metal is melted directly just before the pouring spout, heated to a predetermined pouring temperature, and then poured into the guide, but in order to do so, the following points had to be resolved. Ta.

+11 Structure of heating energy heat source and melting chamber for inserting cold material and melting aluminum ingots.

(2) Structure of the cold material supply device for inserting the aluminum ingot into the melting chamber.

(3) Structure of heating means and heating chamber for storing molten aluminum and raising the temperature to a predetermined pouring temperature.

(4) How to pour molten metal from the melting chamber to the heating chamber, and from the heating chamber to the tie pouring slot.

(5) Ancillary equipment related to the above.

[Means for Solving the Problems] In the present invention, the following aluminum ingot rapid melting method and apparatus are adopted in order to solve the above-mentioned problems related to inserting, melting, pouring, etc. of the material.

First, the rapid dissolution method of the present invention will be explained below.

(a) - An integrated furnace body for melting and temperature raising, with one end serving as an insertion port for aluminum-based metal ingots and the other end serving as a pouring port for heated molten metal and a bent portion in the middle. The side of the furnace 7 main body that is continuous with the insertion port is the insertion/melting zone, the part from the pouring port to the end of the melting zone is the temperature raising/pouring zone, and the temperature increasing/pouring zone is from the insertion/melting zone to the end of the melting zone. A heating means is arranged on the outer periphery of the furnace body leading to the pouring area so as to be movable relative to the furnace body in the direction of its longitudinal axis and rotation around the axis, forming a melting/heating furnace assembly. The outward protruding end of the bent portion of the melting/heating furnace assembly is the lowest end with respect to the horizontal plane, and the portion from the insertion port side of the furnace body to the bent portion and the portion from the pouring port to the bent portion are The melting and
A predetermined number of ingots are introduced through the insertion port of the temperature rising furnace assembly, and melting proceeds while forming droplets from the surface of the ingot toward the inside using the heating means.

(b) The formed droplets are allowed to flow down into the temperature rising area to form a molten metal pool, and if the ingot being melted during the process decreases to a predetermined length or less due to melting, a fifth ingot is inserted. Replenish.

(c) When the molten metal in the molten metal pool reaches a predetermined amount,
The heating means is moved to a position suitable for raising the temperature, and the temperature is raised to a predetermined temperature.

(d) The molten metal heated to a predetermined temperature is poured by rotating the furnace body around its longitudinal axis.

Note that the aluminum ingot inserted from the insertion port is
It is convenient to insert two pieces in a set back to back, with their flat bottoms touching each other.

Further, the heating means is preferably a melting/heating coil.

Furthermore, the insertion/melting area and the temperature raising/pouring area of the furnace body are divided by a drainboard-shaped rectifier plate installed at the boundary between the two, and the droplets formed as melting progresses through this rectifier. It is convenient if the molten metal passes through a slit made in the plate and flows down to the heating/pouring area.

The rapid melting device of the present invention is composed of the following parts.

(A) A first pipe leg continuous to one open end that serves as an aluminum ingot insertion port, and a first pipe leg connected to the first pipe leg through a bent portion from the other open end that serves as a molten metal pouring port. A metallurgical vessel in the shape of a curved hollow tube made of a fireproof material and having a second pipe leg continuous at a predetermined angle; The aluminum ingot insertion and melting area that occupies the intermediate position before reaching the bending part, the drainboard-shaped rectifier plate provided at the lower end of this melting area, and the temperature rise that occupies the area from this rectifier plate to the molten metal pouring port. and a melting/heating furnace body having a pouring area.

(B) A heating means mounted on the outer periphery of the first pipe leg of the melting/heating furnace main body so as to be movable relative to the leg in the longitudinal axis direction and rotationally around the axis.

(C) A pedestal that pivotally supports the melting/heating furnace body and the heating means in a swingable manner.

Further, the outward protruding end of the bent portion of the melting/heating furnace body is the lowest end with respect to the horizontal plane, and the first tube leg portion and the second tube leg portion are inclined at a predetermined angle with respect to the horizontal plane. In this state, the aluminum ingot is inserted, heated, and heated, and the melting/heating furnace body is rotated in one direction around the longitudinal axis, and then the melt is poured, and the aluminum ingot is rotated in the other direction. It is a good idea to drain the slag and remaining hot water while the water is still in place.

In principle, the heating means is a melting/heating coil for induction heating the aluminum ingot.

Further, at the lower end of the first pipe leg of the melting/heating furnace main body,
It is convenient to provide a weighing sensor that detects changes in the weight of the entire melting/heating furnace including the molten metal inside.

[Operation] The normal operating steps of inserting the aluminum ingot, melting it, raising the temperature, and pouring the metal are repeated with the two tube legs both arranged at a predetermined angle with respect to the horizontal plane.

The aluminum ingot is inserted through the open end of the horn-shaped melting/heating furnace arranged at an angle, moves along the bottom wall of the inclined tube leg to the melting zone under its own weight, and
Melt as droplets from the surface by induction melting.

The thus generated droplets pass through the drainboard-shaped rectifier plate at the tip of the melting zone and drip into the heating zone, which is arranged continuously in front of the melting zone, to form a molten metal pool, which is necessary for pouring. Once the desired amount has been reached, move the melting/heating coil close to the heating range, raise the temperature to 720°C or higher, and pour the melt into the die-casting machine's gouge or through the pouring port of a conveyor-type continuous pouring method using the shell mold method, etc. Pour hot water into the water.

To pour the molten metal, the molten metal is tilted into the die of the die-casting machine by rotating the melting/heating furnace by a predetermined angle around its longitudinal axis using the molten metal pouring motor.

If there is an unexpected power outage, when discharging unnecessary residual metal or slag, or when repairing the inner wall of the melting/heating furnace, rotate the melting/heating furnace in the opposite direction to the direction used for pouring. The open end for pouring molten metal at the tip of the melting/heating furnace is directed downward, but on the opposite side of the pouring slot of the die-casting machine, and is discharged by dropping it into a slag storage area, repair yard, etc.

When replacing the entire melting/heating furnace, swing the entire melting/heating device, including the melting/heating coil, around the spindle to make it at a near-horizontal angle for easy extraction. Remove the furnace and replace it with another one.

[Example] Fig. 1 is a side sectional view showing a preferred embodiment of the rapid melting apparatus of the present invention used for melting aluminum ingot materials immediately before the tie of a die-casting machine. The entire rapid melting device is shown, where 11 is the main body of the melting/heating furnace, and the whole is a curved hollow tube resembling a horn.

Roughly speaking, the melting/temperature raising furnace main body 11 is relatively long from one open end (inlet open end) 12, which serves as an insertion port for an aluminum ingot as a cold material, to a bent part 13 bent at a right angle. The first tube leg portion 11a, the bent portion 13, and the first tube leg portion 11a from the bent portion 13 to the other end (exit open end) 14 which serves as a discharge port for molten metal, slag, etc. on the opposite side from the artificial open end 12. It consists of three parts: 2 tube legs Jlb;

The outlet open end 14 serves as a molten metal outlet as well as a discharge port for slag, etc., and in that case, the melting/heating furnace 11
The entire body is rotated about its axis in the opposite direction to that for tapping.

The second tube leg Llb and the first tube leg 1 continuous thereto
In 1a, on the opposite side of the bending part 13, the part bent in the shape of "<" and including a part with approximately the same volume as the outlet pipe part becomes a molten metal pool and a heating/pouring area that also serves as a pouring port. S, and the remaining portion of the first tube leg portion 11a, that is, from the upper end of the temperature rising region to the open end 12, becomes an insertion/melting region Y where the aluminum ingot is inserted and melted.

The temperature raising/pouring region S and the insertion/melting region Y are separated by a slat-shaped rectifying plate 15 located between the two and having a large number of slots.

This current plate 15 prevents the aluminum ingot 20 inserted from the inlet open end 12 from falling to the temperature rising/pouring area S due to gravity, and restrains the aluminum ingot 20 within the insertion/melting area Y. At the same time, the aluminum droplets melted and dripped from the surface of the aluminum ingot by induction heating pass through the slots of the current plate 15 and flow into the heating/pouring region S to form a molten metal pool.

A melting/heating coil 16 is attached to the outer periphery of the first tube leg portion 11a of the melting/heating furnace 11 via a furnace holding bearing 17. It is possible to reciprocate in the axial direction of the melting/heating furnace 11 along the outer periphery of the first tube leg 11a up to the open end 12.

This is done by setting the optimal linkage position between the aluminum ingot and the magnetic flux for additionally inserting the next aluminum ingot into the first tube leg 11a during each process of melting and heating, and melting and heating the aluminum ingot. This is to adjust the position of the melting/heating coil 16 with respect to the first pipe leg portion 11a in order to raise the temperature of the molten metal pool in the warming/pouring zone S under optimal conditions.

The melting/temperature raising coil 16 is fixed to a coil mounting plate 16a, and the coil mounting plate 16a is swingably mounted to a pedestal 19 via a support shaft 18. On the other hand, a pouring motor M is attached to the coil mounting plate 16a, and rotates the melting/heating furnace 11 around its longitudinal axis via a gear G.

As already mentioned, the first tube leg 1 of the melting and heating furnace 11
1a is a melting/heating coil 16 by a furnace holding bearing 17;
Since the first tube leg portion 11a is held so as to be rotatable and movable in the longitudinal axis direction relative to the melting/heating coil 16, the first tube leg portion 11a is rotated counterclockwise (in the direction of arrow B) If the outlet open end 14 is oriented downward, the molten metal in the molten metal pool in the heating/pouring zone S can be poured into the die casting machine (not shown), and vice versa. If it is rotated so that the outlet open end 14 faces downward on the opposite side, the remaining metal and slag after pouring the molten metal can be discharged to the slag disposal bit.

Furthermore, the entire assembly of the melting/heating furnace 11 and the melting/heating coil 16 can be swung relative to the pedestal 19 with the support shaft 18 as a horizontal axis. If the long pipe part of the assembly is horizontally turned or tilted so that the left side is upward in the figure, the melting/temperature raising furnace 11 can be pulled out from the melting/heating coil 16 and the melting/heating process can be started. The warm furnace 11 can be replaced.

Also, a load cell C is installed at the lower end of the first tube leg portion 11a of the melting/heating furnace 11 directly above the bending portion 13, and is a combination of the melting/heating furnace 11 and the melting/heating coil 1B. It detects the load due to the total weight of the entire solid body, the aluminum ingots inside it, and the molten metal, and determines when to pour the metal, as well as setting the optimal time to insert the next aluminum ingot.

In addition, 24 is a shake for introducing cold material arranged at the same angle with respect to the horizontal plane as the first pipe leg 11a,
Although not shown, a stopper for retaining the material on this chute is provided.

Next, a description will be given of an operating method when melting an aluminum ingot using the rapid melting device for melting the intermediate material of the present invention.

(1) Aluminum ingot 20 as shown in Figure 2 (A)
As shown in FIG. 2(B), the flat bottom surfaces 21 of each ingot are stacked back to back, and the uneven surfaces 22 of each ingot are placed at the top and bottom of each ingot. The material is conveyed from a green material setter (not shown) to a cold material charging chute 24 located close to the inlet opening end 12 of the melting/heating furnace 11 shown in FIG.

(2) Open the stopper (not shown) of the chute 24 for charging cold material, and remove the aluminum ingot 20 in the chute 24.
is caused to fall along the inclined bottom surface of the first tube leg portion 11a under one gravity and is seated on the drainboard-shaped rectifier plate 15.

(3) Electrify the melting/heating coil 16 and insert/melting area Y
The aluminum ingot 20 inside is heated and melted to a temperature higher than the melting temperature of approximately 550°C. The molten metal produced by this operation flows down the surface of the aluminum ingot, passes through the narrow grooves (slits) of the rectifying plate 15, and flows into the temperature rising pouring region S to form a molten metal pool. The aluminum ingot 2° is heated by the heat given by the droplets flowing down the surface and the progress of melting.
Due to the overall temperature rise, the closer the aluminum ingot 20 is to the current plate 15, the more it is melted to the center, so the height of the aluminum ingot 20 gradually decreases.

(4) Open the stopper of the cold material injection chute 24 again and insert the primary aluminum ingot 20 into the insertion/melting zone Y. The time to additionally insert the primary aluminum ingot 20 is when the aluminum ingot 20 and the melting/heating coil 1 are inserted.
It is determined by considering the interlinkage position with the magnetic flux due to 6. Normally, the optimum point is when the top of the aluminum ingot 20 passes through the melting/heating coil 16, crosses the interlinkage line with the aluminum ingot 20 as a conductor inside the coil 16, and begins to fall downward. , this position is considered the optimal linkage point.

(5) If necessary, move the position of the melting/heating coil 16 in the axial direction along the outer periphery of the first tube leg portion 11a of the melting/heating furnace 11. Note that this operation is performed because even if the size of the melting/heating coil 11 is fixed, the top of the melting/heating coil 16 may be set at the optimum position for the melting area depending on the size of the aluminum ingot, the type of alloy, etc. Because it needs to be fixed.

(6) Weigh the total weight of the molten metal pool and the entire rapid melting device (including the aluminum ingot in the device) using load cell C, and calculate the amount of molten metal in the molten metal pool excluding the weight of the rapid melting device. When the molten metal reaches a predetermined amount, the above molten metal process is stopped and the next temperature raising process is started.

(7) Move the melting/heating coil 16 along the outer periphery of the first tube leg portion 11a so that the bending portion 13 increases the portion where this coil 16 interlinks with the molten metal in the heating/pouring region S. Move it diagonally downward as shown in the figure.

The temperature of the molten metal in the molten metal pool is raised until it reaches a predetermined tapping temperature.

(8) When the predetermined tapping temperature is reached, the melting/heating furnace 11 whose outer periphery is pivotally supported by the furnace holding bearing 17 is moved by the pouring motor M.
, and rotate it counterclockwise around the longitudinal axis of the furnace as shown by arrow B, so that the open end 14 of the second pipe leg 11b faces downward at an appropriate angle, and the opening end 14 of the second pipe leg 11b is turned downward at an appropriate angle, and the opening end 14 of the second pipe leg 11b is turned downward at an appropriate angle. The molten metal is poured into the pouring slot of the die-casting machine.

(9) When pouring is finished, rotate the melting/temperature raising furnace 11 in clockwise direction A around the longitudinal axis of the furnace to return to the melting position, insert and melt the aluminum ingot, and then pour the metal. Repeat this process.

(10) When disposing of residual metal and slag generated in the melting process, or when removing broken pieces of the furnace refractories, turn the melting/heating furnace 11 clockwise as shown by arrow A. the opening end 1 of the second tube leg portion 11b.
Point 4 downwards on the opposite side from when pouring, and discharge unnecessary chino from inside the furnace to a slag dumping pit.

(11) If the furnace is severely damaged and requires replacement,
The entire melting/heating furnace including the melting/heating coil 16 is mounted on the frame 1
Move the oil around the support shaft 18 of 9 in the direction of the arrow to make the melting/heating furnace 11 at an angle that makes it easy to pull it out from the furnace holding bearing 17. Exchange.

Although this example describes the case of pouring metal into a die-casting machine, it can also be effectively applied to shell molding or other casting methods in which the mold is moved by a conveyor system and pouring is performed at a fixed position. Of course.

[Effect of the invention] As can be understood from the above explanation, an aluminum ingot is inserted and melted just before the die-casting machine's die slot.
In carrying out so-called cold material rapid melting, the apparatus of the present invention achieves many advantages in terms of structure and operation, as described below.

(B) Melting and heating The furnace for melting the aluminum ingot is a horn-shaped hollow tube furnace in which the melting zone and the heating zone are continuous, and the aluminum ingot as a cold material is poured into the furnace from one open end. insert,
In the melting zone, the aluminum ingot is sequentially melted from the surface and flows down to the temperature raising zone as a large number of droplets, where it is heated until it reaches the pouring temperature, and a single heating device is used for both melting and temperature raising of the aluminum ingot. Since melting and temperature raising can be performed in a single furnace and a single heating device in this way, the structure is simple and the manufacturing cost is low.

(b) Insertion of cold material The chute for charging cold material at the end of the cold material supply device
A heating furnace is a series of slides that are tilted at a predetermined angle with respect to the horizontal plane, and are arranged in a line to form a series of slides. The aluminum ingot is inserted into the melting area by its own weight into the sliding hole along the slope of the cold material charging chute and the bottom of the melting/heating furnace, so there is no need to provide any special conveying device such as an air cylinder. ) Pouring and discharging slag, etc. For pouring molten metal heated to a predetermined temperature and discharging unnecessary residual metal and slag, a melting/heating furnace is used with its longitudinal axis as the rotation axis. It is sufficient to rotate each of them one counterclockwise direction or one clockwise direction, and there is no need to provide a molten metal moving device such as an electromagnetic pump.

(d) Replacement of the melting/heating furnace When it becomes necessary to replace the entire melting/heating furnace, the melting/heating furnace must be replaced.
The furnace can be easily removed and replaced with another furnace by simply swinging the entire temperature raising furnace assembly around the support shaft and adjusting the angle so that it can be easily removed from the furnace holding bearing.

[Brief explanation of drawings]

FIG. 1 is a side cross-sectional view of an embodiment of the present invention, and FIG.
) is a perspective view showing the shape of a typical aluminum ingot, Figure 2 (B) is a side view showing a pair of two aluminum ingots, and Figure 3 is a schematic diagram showing the conventional melting and pouring method. Figure 1. Reference numeral 10 in the drawings: rapid melting device, 11a: first tube leg, 12: open inlet end, 14: open outlet end, 16: melting/temperature raising coil, 17: furnace holding bearing, 19: frame. 21: Flat bottom surface. S: Temperature increase/pouring area, 18: Support shaft. 20 Ni aluminum ingot Y: Insertion/melting area. C: Load cell. 11: Melting/heating furnace. 11b: second tube leg portion, 13: bending portion, 15: current plate,

Claims (1)

[Claims] 1. When pouring molten aluminum-based metal containing aluminum and its alloys into a casting machine such as a die-casting machine,
An aluminum ingot having a composition corresponding to the molten metal is supplied as a cold material at a position close to the casting machine, the molten metal is rapidly melted, and the aluminum ingot is heated and poured. , One end is inserted into the insertion slot of the aluminum-based metal ingot,
The other end serves as a pouring port for heated molten metal, and a curved hollow tube with a bent part in the middle is used as an integrated furnace body for melting and temperature raising, and the side continuous to the insertion opening of the furnace body is inserted and melted. The area from the pouring port to the end of the melting zone is the heating/pouring zone, and the longitudinal axis of the furnace body from the insertion/melting zone to the heating/pouring zone is A melting/heating furnace assembly is constructed in which the heating means is arranged so as to be movable relative to the direction and rotation around the axis, and the outwardly protruding end of the bent portion of the melting/heating furnace assembly is The furnace body is arranged so that it is the lowest end with respect to the horizontal plane, and the part from the insertion port side to the bent part of the furnace body and the part from the pouring port to the bent part are inclined at a predetermined angle with respect to the horizontal plane. A predetermined number of ingots are introduced through the insertion port of the heating furnace assembly, and melting proceeds while forming droplets from the surface of the ingot toward the inside using the heating means, and the temperature of the formed droplets is increased. During this time, if the ingot being melted reduces to a predetermined length or less due to melting, the next ingot is inserted to replenish the molten metal, and the molten metal in the molten metal pool reaches a predetermined amount. When the temperature reaches a predetermined temperature, the heating means is moved to a position suitable for raising the temperature, the temperature is raised to a predetermined temperature, and the furnace body is rotated around its longitudinal axis to pour the aluminum ingot. Rapid melting method using material supply. 2. Two aluminum ingots are inserted through the insertion slot.
2. The method for rapidly melting aluminum ingots by supplying cold material according to claim 1, wherein the aluminum ingots are inserted in pairs back to back with their flat bottom surfaces in contact with each other. 3. The method for rapidly melting an aluminum ingot by supplying a cold material according to claim 1 or 2, wherein the heating means is a melting/heating coil. 4. The insertion/melting area of the furnace body and the heating/molten metal pouring area are separated by a drainboard-shaped rectifier plate installed at the boundary between the two, and the droplets formed as melting progresses through the rectifier plate. 4. The method for rapidly melting an aluminum ingot by supplying a cold material according to claim 1, wherein the aluminum ingot flows through a slit formed in the slit and flows down into the temperature raising/pouring area. 5. A rapid melting device for supplying a cold material to an aluminum ingot, which is integrally configured to consistently melt, raise the temperature, and pour the cold material for the aluminum ingot, and one opening serves as an insertion port for the ingot. a first pipe leg continuous to the end; and a second pipe continuous from the other open end serving as a molten metal pouring port at a predetermined angle with respect to the first pipe leg via a bent part. An aluminum ingot that occupies the interior of the bent hollow tubular metallurgical vessel made of a refractory material and having legs from the opening end as an insertion port of the first pipe leg to an intermediate position before reaching the bent part. an insertion and dissolution zone;
A melting/heating furnace main body having a drainboard-shaped rectifier plate provided at the lower end of the melting area, and a heating and pouring area that occupies the area from the rectifier plate to the molten metal pouring port; a heating means mounted on the outer periphery of the first pipe leg of the main body so as to be movable relative to the leg in the longitudinal axis direction and rotation around the axis; An apparatus for rapidly melting aluminum ingots by supplying a cold material, the apparatus comprising: a means for swingably supporting a frame; 6. The outward protruding end of the bent part of the melting/temperature raising furnace body is the lowest end with respect to the horizontal plane, and the first pipe leg part and the second pipe leg part are arranged so as to be inclined at a predetermined angle with respect to the horizontal plane. In this state, the aluminum ingot is inserted, heated, and heated, and the melting/heating furnace body is rotated in one direction around the longitudinal axis, and the melt is poured, and the aluminum ingot is rotated in the other direction. 6. The apparatus for rapidly melting aluminum ingots by supplying cold material according to claim 5, wherein slag and residual metal are discharged. 7. The rapid melting apparatus for aluminum ingots according to claim 5 or 6, wherein the heating means is a melting/heating coil for induction heating the aluminum ingots. 8. A weighing sensor for detecting a change in weight of the entire melting/heating furnace including the molten metal inside is provided at the lower end of the first pipe leg of the melting/heating furnace main body. Rapid melting equipment using cold material supply for aluminum ingots.