JP2023035524A - Aluminum molten metal pumping-up chamber, aluminum molten metal holding furnace and aluminum molten metal pumping-up method - Google Patents

Abstract

To provide an aluminum molten metal pumping-up chamber capable of effectively reducing energy lost by heat radiation from an aluminum molten metal therein and high in safety, an aluminum molten metal holding furnace and an aluminum molten metal pumping-up method.SOLUTION: An aluminum molten metal pumping-up chamber 40 comprises: an aluminum foil winding roller 43 wound with an aluminum foil F for covering an upper face opening part of a pumping-up container 41 storing an aluminum molten metal M; and an aluminum foil drawing device drawing the aluminum foil F wound around the aluminum foil winding roller 43 to the upper face of the pumping-up container 41.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing chamber for molten aluminum, a furnace for holding molten aluminum, and a method for drawing molten aluminum, in which aluminum is held in a molten state.

When conveying aluminum from a pumping chamber of an aluminum holding furnace to a product manufacturing line, a ladle is thrown into molten aluminum stored in a molten state and the aluminum is pumped out. However, a large amount of heat is radiated from the molten aluminum pumping chamber due to aluminum convection and radiation. The quantity is more than 10 Kw/h for a pumping chamber of 500 kg. Therefore, prevention of such heat radiation has been desired from the viewpoint of reduction of carbon dioxide as well as reduction of energy loss.

In order to reduce such energy loss, it has been proposed to cover the draw-out chamber of the aluminum holding furnace except when the ladle is put into the draw-out chamber. For example, a holding chamber for holding molten metal formed by melting a metal ingot and a partition wall that is arranged adjacent to the holding chamber and partitions the holding chamber is provided with a communication hole through which the molten metal can pass. A holding furnace having a pumping chamber for pumping introduced molten metal, wherein the pumping chamber has a pumping outlet for pumping out the molten metal and a pumping cover for opening and closing the pumping outlet. A holding furnace has been proposed in which a drop lid is attached to cover the surface of the molten metal in the pouring chamber when the outlet is closed, and to remove the molten metal from the pouring chamber when the outlet is open (Patent Document 1).

However, when heat dissipation is reduced by mechanical opening and closing of the lid, there is a possibility of a serious accident if the lid does not move when the ladle is turned on, and the energy used to operate it is considerable. Therefore, it does not contribute to effective reduction.

JP-A-2005-77076

Therefore, the present invention has been made to solve such problems, and is capable of effectively reducing the energy lost by heat radiation from the molten aluminum in the molten aluminum pumping chamber and providing a highly safe molten aluminum. It is an object of the present invention to provide a pumping chamber, a holding furnace for molten aluminum, and a method for pumping molten aluminum.

The present invention employs the following means to achieve the above objects.

The pumping chamber for molten aluminum according to the present invention includes:
In a molten aluminum pumping chamber for pumping molten aluminum,
an aluminum foil winding roller wound with aluminum foil for covering the top opening of the pumping container in which the molten aluminum is stored;
an aluminum foil drawing device for drawing the aluminum foil wound around the aluminum foil winding roller onto the upper surface of the drawing container;
characterized by comprising

In the molten aluminum pumping-out chamber according to the present invention, the upper surface of the molten aluminum is covered with aluminum foil to reduce the energy loss of heat radiation from the molten aluminum, and when the molten aluminum is pumped out by the ladle, the aluminum foil is removed. By dropping it into the aluminum molten metal, it is possible to prevent an event such as the occurrence of a problem when the lid does not operate as in the conventional case, and to provide an aluminum pumping chamber that is safe and can reduce energy loss.

Further, in the aluminum molten metal pumping chamber according to the present invention,
The aluminum foil withdrawal device is
a plurality of needle members for fixing the aluminum foil;
an arm member to which a plurality of needle members are attached at predetermined intervals;
a rotating device provided at an end of the arm member for rotatably moving the arm member;
a moving device for moving the arm member so as to pull it out from the aluminum foil winding roller;
It may be characterized by comprising

By adopting such a pouring chamber for molten aluminum, the upper surface of the pouring container can be quickly and easily covered with aluminum foil.

Furthermore, the present invention provides a pumping chamber for molten aluminum as described above,
a melting chamber for heating and melting an aluminum ingot into molten aluminum;
a holding chamber into which the molten aluminum flows into the melting chamber and holds the molten aluminum as it is;
To provide an aluminum molten metal holding furnace characterized by comprising

By adopting such a molten aluminum holding furnace, it is possible to efficiently reduce the energy loss of the heat radiation of the molten aluminum and to provide a safe molten aluminum holding furnace.

Furthermore, the present invention provides a pumping method for pumping molten aluminum from the above-described pumping chamber for molten aluminum,
To provide a method for drawing out molten aluminum, characterized in that a ladle is thrown into the molten aluminum so as to drop the aluminum foil into the molten aluminum from the upper side of the opening surface of a drawing chamber container covered with aluminum foil. do.

By adopting such a method, the energy loss can be effectively reduced to pump molten aluminum.

Furthermore, the present invention provides the method for pumping out molten aluminum described above,
After the aluminum foil is dropped into the molten aluminum,
a piercing step of moving the arm member in an upright state to the aluminum foil in the vicinity of the aluminum winding roller, rotating the arm member so as to tilt at that position, and piercing the aluminum foil with the needle member;
a pulling step of pulling out the pierced aluminum foil by the arm member so as to cover the opening surface of the pumping chamber container;
It may be characterized by comprising

By adopting such a configuration, the aluminum foil dropped into the pumping chamber can be quickly and safely covered again on the upper surface of the opening surface of the pumping chamber container.

FIG. 1 is a schematic diagram of a molten aluminum holding furnace 100 according to an embodiment. FIG. 2 is a side view of the molten aluminum pumping chamber 40 according to the embodiment. FIG. 3 is a side view of the molten aluminum pumping chamber 40 according to the embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A molten aluminum pumping chamber 40 and an aluminum melting and holding furnace 100 according to embodiments of the present invention will be described in detail below with reference to the drawings. It should be noted that the embodiments and drawings described below illustrate a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations, and are within the scope of the present invention. can be changed as appropriate. Corresponding components in each figure are labeled with the same or similar reference numerals.

The aluminum molten metal holding furnace 100 according to the present embodiment mainly includes a melting chamber 20 that heats and melts an aluminum ingot 90 and melts it into the aluminum molten metal M, and the molten aluminum M in the melting chamber 20 is flowed and flowed. A holding chamber 30 for holding the molten aluminum M as it is and a molten aluminum pumping-out chamber 40 for pumping out the molten aluminum M held at a predetermined temperature in the holding chamber 30 are provided.

The configurations of the melting chamber 20 and the holding chamber 30 are not particularly limited, and as shown in FIG. It may be a method. A degassing chamber may optionally be provided. Furthermore, detection devices for detecting the temperature and surface of the molten aluminum M in the melting chamber 20 and the holding chamber 30, and control devices for controlling the molten aluminum M, etc., can be provided arbitrarily. Also, the order of the melting chamber 20 and the holding chamber 30 may be reversed, and other chambers may be provided.

The molten aluminum pumping chamber 40 is filled with molten aluminum M adjusted to an appropriate temperature by the holding chamber 30 . The molten aluminum M in the molten aluminum pumping chamber 40 is pumped up by a ladle 80 of a pumping device, which is a separate device, and transported to a product manufacturing line. Since the aluminum molten metal pumping chamber 40 is pumped by the ladle 80, the aluminum molten metal M is exposed to the outside air, and therefore the energy loss is large due to convection and heat radiation from the aluminum molten metal M. A molten aluminum drawing chamber 40 according to the embodiment mainly includes a drawing container 41 , an aluminum foil winding roller 43 and an aluminum foil drawing device 45 . The pumping container 41 is formed in a container shape with an open upper surface, and molten aluminum M is poured into the inside thereof. The aluminum foil winding roller 43 is formed by winding an aluminum foil F having a width wider than the surface of the molten aluminum in the molten aluminum pumping chamber 40 , and is arranged near the edge of the upper surface of the molten aluminum pumping chamber 40 . there is By pulling out the wound aluminum foil F, the opening surface of the pumping chamber container 41 can be covered. Although the thickness of the aluminum foil F wound around the aluminum foil winding roller 43 is not particularly limited, it is preferably 0.2 mm or less. If the thickness is more than this, it becomes difficult to deform the aluminum foil F by the ladle 80, as will be described in detail later.

As shown in FIG. 2, the aluminum foil drawing device 45 includes a plurality of needle members 45a for fixing the aluminum foil F, an arm member 45b to which the plurality of needle members 45a are attached at predetermined intervals, and the arm member 45b. A rotating device 45c provided at the end of the member 45b for rotatably moving the arm member 45b and a moving device 45d for pulling out the arm member 45b from the aluminum foil winding roller 43 are mainly provided. there is

The needle member 45a is a member that enables the aluminum foil F to be pulled out by piercing the aluminum foil F. If the needle member 45a is a member that has the strength to pierce the aluminum foil F and resistance to the heat from the molten aluminum M, it is particularly preferable. The number of the needle members 45a, which is not limited, is appropriately selected so that the aluminum foil F can be pulled out while the needle members 45a are stuck in the aluminum foil F. A plurality of needle members 45a are attached to the arm member 45b at predetermined intervals. The rotating device 45c is provided at or near the end of the arm member 45b to which the needle members 45a are attached, and rotates the arm member 45b in the direction of arrow a as shown in FIG. , the needle member 45a can be moved so as to pierce the aluminum foil F, or moved away from it. The moving device 45d can pull out the aluminum foil F attached by the arm member 45b and move the arm member 45b so as to cover the opening surface of the molten aluminum pumping chamber 40. As shown in FIG.

The molten aluminum holding furnace 100 configured as described above is used as follows. First, molten aluminum M such as an aluminum ingot 90 is charged into the melting chamber 20 and heated by a direct flame burner or the like to obtain molten aluminum M. As shown in FIG. The obtained molten aluminum M is sent to the holding chamber 30 and heated to a predetermined temperature by an immersion burner, an IH, or the like. The molten aluminum M heated to a predetermined temperature is sent to a molten aluminum pumping chamber 40 for pumping out to the outside.

In the molten aluminum pumping chamber 40, the opening surface of the pumping chamber container 41 is covered with aluminum foil F so as to reduce the escape of the heat of the molten metal to the outside air. From this state, the ladle 80 is thrown into the molten aluminum M so as to drop the aluminum foil F into the molten aluminum M from the upper surface side of the aluminum foil F covered with the ladle 80 of the pumping device, and the molten aluminum M is pumped out. and transported to the product manufacturing line. The aluminum foil F dropped into the molten aluminum M is melted by the temperature of the molten aluminum M, and the molten aluminum M is utilized.

After the aluminum foil F on the upper surface of the pumping chamber container 41 is dropped into the molten aluminum M, the arm member 45b moves to the vicinity of the aluminum winding roller 43 in an upright state and tilts at that position. and pierces the aluminum foil F with the needle member 45a. In this state, the arm member 45b is moved by the moving device 45d so as to pull out the aluminum foil F from the aluminum winding roller 43 so as to cover the opening surface of the pumping chamber container 41 . In this manner, by covering the upper surface of the drawing chamber container 41 with the aluminum foil F, it is possible to reduce the diffusion of the heat of the molten aluminum M to the outside air. Then, the aluminum foil F is dropped into the molten aluminum M from the upper surface side of the aluminum foil F by the ladle 80 again, and the molten aluminum M is pumped out. This is repeated below.

Furthermore, a fixing member 47 for fixing the aluminum foil F may be provided in the vicinity of the aluminum winding roller 43 as shown in FIG. By adopting such a configuration, it is possible to prevent the aluminum foil F that has been pulled out from being further pulled out by the ladle 80 .

Further, a cutting device 48 may be provided to cut the aluminum foil F at the timing when the ladle 80 presses against the pulled out aluminum foil F. By adopting such a configuration, the aluminum foil F can be reliably dropped into the molten aluminum M by the ladle 80 .

According to the molten aluminum pumping chamber 40 described above, the aluminum foil F can reduce the heat diffusion of the molten aluminum M, thereby reducing the energy loss. In addition, if the aluminum molten metal pumping chamber 40 is covered with a hard lid or the like, if the ladle 80 does not move when it is inserted, a serious accident will occur, and the energy used to operate the lid is considerable. become a thing. On the other hand, by covering with aluminum foil F, it is light, and since it is made of aluminum, there is no problem even if it is immersed in molten aluminum. have an effect.

It goes without saying that the present invention is by no means limited to the above-described embodiments, and can be embodied in various forms as long as they fall within the technical scope of the present invention.

As shown in the above-described embodiment, it can be industrially used as a pumping device for pumping molten aluminum.

DESCRIPTION OF SYMBOLS 20... Melting chamber 30... Holding chamber 25... Heating device 40... Molten aluminum drawing-out chamber 41... Drawing-out container 43... Aluminum foil winding roller 45... Aluminum foil drawing device 45a... Needle member 45b... Arm member 45c Rotating device 45d Moving device 47 Fixed member 48 Cutting device 80 Ladle 90 Aluminum ingot 100 Aluminum melting and holding furnace M Molten aluminum F Aluminum foil

Claims (5)

In a molten aluminum pumping chamber for pumping molten aluminum,
an aluminum foil winding roller wound with aluminum foil for covering the top opening of the pumping container in which the molten aluminum is stored;
an aluminum foil drawing device for drawing the aluminum foil wound around the aluminum foil winding roller onto the upper surface of the drawing container;
A pumping chamber for molten aluminum, characterized in that it comprises a The aluminum foil withdrawal device is
a plurality of needle members for fixing the aluminum foil;
an arm member to which a plurality of needle members are attached at predetermined intervals;
a rotating device provided at an end of the arm member for rotatably moving the arm member;
a moving device for moving the arm member so as to pull it out from the aluminum foil winding roller;
The aluminum melt pumping chamber according to claim 1, characterized in that it comprises: a pumping chamber for molten aluminum according to claim 1 or 2;
a melting chamber for heating and melting an aluminum ingot into the molten aluminum;
a holding chamber into which the molten aluminum flows into the melting chamber and holds the molten aluminum that has flowed into the melting chamber;
A molten aluminum holding furnace comprising: In the pumping method for pumping molten aluminum from the molten aluminum pumping chamber according to claim 1 or 2,
A method for drawing out molten aluminum, characterized in that a ladle is thrown into the molten aluminum so as to drop the aluminum foil into the molten aluminum from the upper side of the opening of a container for drawing out which is covered with aluminum foil. . After the aluminum foil is dropped into the molten aluminum,
a piercing step of moving the arm member in an upright state to the aluminum foil in the vicinity of the aluminum winding roller, rotating the arm member so as to tilt at that position, and piercing the aluminum foil with the needle member;
a drawing step of drawing out the pierced aluminum foil by the arm member so as to cover the opening surface of the drawing container;
The method for pumping molten aluminum according to claim 4, characterized by comprising:

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