JP3513190B2 - Method and apparatus for producing metal objects - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for producing alloy bodies, preferably standard weight alloy bodies, by casting, so that the alloy material is added to the main metal stream after the main metal has been melted. Is.

[0002]

2. Description of the Prior Art During the casting of alloy bodies, the alloy stock is usually added to the same blast furnace in the solid state in connection with the melting of the main metal. Prior to casting, analytical specimens are removed from the blast furnace to confirm correct synthesis, but this operation substantially increases the length of the casting cycle. Furthermore, if several alloys, including different alloy stocks, are to be cast in the same blast furnace, the furnaces must be substantially completely emptied in order to prevent any mixing of the individual alloys.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art by casting an alloy body, essentially an alloy body of standard weight, into a blast furnace used to melt the main metal. It is an object of the present invention to produce the alloy material as it is subsequently supplied to the molten main metal stream between the blast furnace and the mold, without the need to supply the material, to achieve an improved and relatively safe method and apparatus. The main new features are apparent in the appended claims.

[0004]

SUMMARY OF THE INVENTION According to the invention, molten metal, from the main metal blast furnace, to at least one connecting channel provided between the blast furnace and the molten metal batch device, preferably the blast furnace. This connection channel can be moved substantially laterally and vertically, although it is introduced at an acceptable rate from the melting volume of the. The amount of molten metal introduced into this connection channel is adjusted by the controller,
To achieve a substantially continuous supply of molten metal from the blast furnace to the connecting channels. The metal to be alloyed may be one or several, but a target amount is introduced into the melt flow between the blast furnace and the mold, and a controller that regulates the main metal flow is also used to target the metal. It is advantageous to adjust the supply of alloy metal (s) according to the alloy ratio and the weight of the metal body to be cast. The alloy metal is introduced either in the molten or solid state into the main metal stream into the connecting channel between the blast furnace and the molten metal batch device or directly into the molten metal batch device.

From the connection channel between the blast furnace and the batch device, the molten metal is introduced into the batch device and is advantageously moved vertically downwards by the transfer member so that the melt is connected. Start the flow from the channel to the mold batcher. In essence, the rate at which the melt is fed from the blast furnace to the connection channel, and the rate at which the individual alloy metal is fed to the connection channel, or if necessary, while the melt is flowing from the connection channel to the batch device. The feed rate can be increased directly to the batching device. The supply of the melt from the connecting channels to the batch device and the resulting turbulence of the metal alloy advantageously enhance the mixing of the metal alloy in an advantageous manner.

The batch device receives a stream of molten metal supplied from the connecting channel and at least one alloy metal stream which may be supplied directly to the batch device. When supplying the same molten metal alloy to the batch device as in the previous casting cycle, a small amount of the metal alloy conveniently remains in the batch device in the previous casting, so that not only loss of metal due to splashing of molten metal The metal loss due to sticking to the bottom of the batch device can be conveniently taken into account. Here, an amount of molten metal corresponding to the weight of the cast metal object is newly supplied to the batch device. If the metal alloy to be cast must be replaced, the batch device only has the amount of molten alloy metal required to correspond the amount of melt contained in the batch device to the weight of the metal object to be cast, Not supplied.

When the target amount of melt is fed to the batch device, the inflow of melt to the batch device is stopped, for example, by moving the connecting channel and the alloy metal feed member to their respective uppermost positions. Good to do. From the batch device, an alloy melt corresponding to the quantity of the object to be cast is introduced into the mold by tilting the batch device. Only if the metal alloy to be cast has to be replaced, it is advantageous to empty the batching device altogether, otherwise leaving a small amount of molten metal to be cast as a basic amount in the batch device.

The feeding of the main metal in the cast metal body from the blast furnace to at least one connecting channel between the blast furnace and the batching device is carried out in two successive steps, the connecting channel being in its uppermost position. If the melt is not flowing into the batch device, it is advantageous to ensure that only the molten main metal is supplied to the connecting channel. Here, this connecting channel conveniently serves as an intermediate tank for the molten main metal, but in this case it does not require another intermediate tank, so that it is not necessary to use a single slag from one tank to the other tank. Lysate transfer is avoided. On the other hand, if the connecting channel is in a low position and the melt is flowing from the connecting channel to the batch device, the feed rate of the molten main metal from the blast furnace to the connecting channel is increased. Feeding of the alloy material (s) is started at substantially the same time as the increase of the feed rate of the main metal, and the alloy material is fed in solid or molten state into the main metal stream in the connecting channel or directly to the batch device. . Therefore, the main metal flow in the blast furnace is independent of this alloy material, and the cast metal alloy can be made by simply changing the amount, alloy ratio or alloy material of the alloy material and the alloy material (s). Modifications can be made from the blast furnace by moving from the blast furnace and feeding the main metal stream between the blast furnace and the mold. In addition, feeding the alloying material (s) into the connecting channel conveniently causes the alloying of the main metal stream to already begin before the batch device.

[0009]

According to the present invention, in a method and apparatus for alloying with at least one alloy material and producing a standard weight metal object by casting, a main metal stream and an alloy material stream are introduced to produce the alloy material. It feeds the molten main metal stream between the blast furnace and the mold used to melt the main metal.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will be described in detail with reference to the accompanying drawings.

According to FIG. 1, the main metal in the metal body to be alloyed is melted in a blast furnace 1. From this blast furnace 1, the molten main metal is introduced into the connecting channel 2, preferably by means of a pump 3, the flow of the melt therethrough being preferably adjustable to suit the capacity of the blast furnace 1. . The amount of this melt to be supplied to the connection channel 2 by the pump 3 is adjusted by the controller 4.
This lysate feed rate is adjusted to conveniently maintain the lysate feed rate when the connecting channel 2 is in its uppermost position, ie while the batching device 5 is in the unload stage.
Only a small amount of melt is allowed to flow into the chute-shaped connecting channel 2. On the other hand, when the connecting channel 2 is in its lower position, i.e. while the batching device 5 is in the filling phase, the melt feed rate is increased, and substantially simultaneously with the increase of the feed rate, the alloy material connecting channel 2 To supply to. One of the alloy materials is first melted in the alloy material blast furnace 6, and a target amount of alloy material per one metal object is introduced into the connection channel through the alloy material batching device 7.
On the other hand, the second alloy material supplied in the solid state is supplied from the alloy material supply device 8 to the molten metal flowing through the connection channel 2 in a desired amount. The supply of alloy material to this connecting channel 2 can also be effected by the same control device 4.

From the connection channel 2, the molten alloy metal is introduced into the batch device 5 in a standard amount for each batch. This standard amount is substantially equal to the weight of the cast metal object. However, in the method of the present invention, when the first batching is performed after changing the alloying method of the metal object, the casting metal object and the same metal object are discharged into the batching apparatus 5 after being discharged. A quantity equal to the weight of the remaining basal quantity is supplied. This basal quantity is taken in connection with the last discharge of the batching device 5, which is done before changing the alloying method of the metal objects.

From the batching device 5, a quantity of molten alloy metal corresponding to the weight of the metal object to be cast is discharged into the mold 9. Several molds 9 can be provided and arranged on the same rotating casting line 10. This mold 9 can also be arranged, preferably fixedly in a curvilinear arrangement, so that the batching device 5 rotates about the center of the circle with respect to said curving.

While the above description is only a description of one preferred embodiment of the invention, the invention can be greatly modified within the scope of the appended claims. For example,
The batch device 5 can advantageously be shared by two or several connection channels 2. Therefore, even large metal objects can be alloyed with high accuracy and at high speed.

[0015]

With the method and the device according to the invention for producing metal objects, it is possible to change the amount of alloy material, the alloy ratio or the alloy material of the metal object without substantially interrupting the production. Similarly, each metal object will contain exactly the target amount of alloy metal, and the metal object will be substantially exactly the target weight. Furthermore, changing the amount of alloy stock, alloy ratio or alloy stock does not produce alloy metal objects inaccurately, thus making the specimen for analysis substantially unnecessary. Moreover, the use of the method and the device according to the invention substantially reduces the space and labor requirements. Due to the simplicity of the device, it requires substantially less work to assemble and install in a production facility, so that the device can be installed substantially faster, which allows the method and device according to the invention to be installed. The applicability of.

[Brief description of drawings]

1 is a schematic view from above of a preferred embodiment according to the invention.

[Explanation of symbols]

1 blast furnace 2 connection channels 3 pumps 4 control device 5,7 batch device 6 Alloy material blast furnace 8 Alloy material supply device 9 molds 10 Rotating mold line

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tom Eland Martilla               Finland 00210 Helsinki               Ki, Wabrinthier 5 Bee                (56) References JP-A-48-100316 (JP, A)

Claims (11)

(57) [Claims] 1. A method for producing a metal object, wherein a batch apparatus for supplying a target amount of a melt to a mold is used to alloy with at least one alloy material to produce a metal object of standard weight by casting. And controlling the alloy material flow,
The main molten metal is continuously supplied to the connection channel between the blast furnace used for melting the main metal and the batch device, and the main melt flowing in the connection channel between the blast furnace and the batch device. supplying the alloy material into the metal stream, before
The connection channel is at least connected to the batch device.
A method for producing a metal object, which is substantially movable vertically . 2. The method for producing a metal object according to claim 1, wherein the alloy raw material is supplied to the main metal flow in batches. 3. The method for producing a metal object according to claim 1, wherein the alloy material is supplied to the main metal stream in a molten state. 4. The method for producing a metal object according to claim 1, wherein the alloy material is supplied to the main metal stream in a solid state. 5. A method for producing a metal object, wherein a batch apparatus for supplying a target amount of a melt to a mold is used to alloy with at least one alloy material and a metal object having a standard weight is produced by casting. And controlling the alloy material flow,
The flow of the main metal is continuously supplied to a connection channel between the blast furnace used for melting the main metal and the batch device, and the alloy material is supplied to the molten main metal flow in the batch device , and the connection is made. Channels to the batch device
A method for producing a metal object, characterized in that it is substantially movable vertically at least . 6. The method for producing a metal object according to claim 5, wherein the alloy raw material is supplied to the main metal stream in batches. 7. The method for producing a metal object according to claim 5, wherein the alloy material is supplied to the main metal stream in a molten state. 8. The method for producing a metal object according to claim 5, wherein the alloy material is supplied to the main metal stream in a solid state. 9. An apparatus for realizing the method according to claim 1, wherein the apparatus comprises a blast furnace for melting the main metal, a batch apparatus for the alloy material, and a molten metal to be cast. And a controller for controlling the flow of the molten metal, a batch device for the molten metal, and a mold, the connection channel being installed between the blast furnace and the batch device. An apparatus for producing a metal object, which is substantially movable at least perpendicularly to the molten metal batch device. 10. The apparatus for producing a metal object according to claim 9, wherein the connection channel functions as an intermediate tank for a substantially continuous main metal flow. 11. Apparatus according to claim 9 or 10, characterized in that the number of said connection channels is at least one for each cast metal object.