JP2016147296A - Continuous casting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous casting apparatus which can prevent reaction of a molten metal before casting.SOLUTION: A continuous casting apparatus comprising: a fusion furnace for fusing an easy reactive non-ferrous metal or an alloy thereof; and a twin roll consisting of a pair of rolls which cools the easy reactive non-ferrous metal or the alloy thereof fed from the fusion furnace, and continuously casts the same. A cylindrical molten metal reservoir is provided above a gap between the pair of rolls, and between the fusion furnace and the molten metal reservoir, a molten metal supply pipe for supplying the molten metal into the molten metal reservoir is provided. A discharge port of the molten metal supply pipe is located at a position lower than a molten metal surface of the molten metal reserved in the molten metal reservoir.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a continuous casting apparatus.

  Conventionally, as a continuous casting technique for non-ferrous metals, for example, Patent Document 1, Patent Document 2, and Patent Document 3 disclose a technique for manufacturing a thin plate of an alloy of magnesium, which is an easily reactive metal. Patent Document 1 discloses a technique of horizontal casting in which rolls are arranged in the vertical direction. Patent Document 2 discloses a technique for manufacturing a magnesium-based metal thin plate having a predetermined thickness by applying pressure to a plate material cast between a pair of first rolls by at least a pair of second rolls and rolling the plate material. Yes. Patent Document 3 discloses a technique for controlling the atmosphere by putting an entire apparatus for continuous casting in a chamber (container).

JP2012-193212A JP 2008-307542 A JP 2003-266150 A

  By the way, in continuous casting of non-ferrous metal, especially in twin roll continuous casting of magnesium-based material, which is an easily reactive metal, and direct molten metal rolling, it combines with oxides on the material surface in the liquid state before casting and components in the atmosphere. Therefore, it is strongly desired to prevent the liquid material (molten metal) before casting from reacting with the outside air. In addition, since the liquid material sequentially cools and solidifies in contact with the roll, it is necessary to make the heat transfer to the roll uniform in order to maintain the quality of the obtained thin plate above a predetermined quality. It is also important to precisely control the pressure applied to the roll.

However, in the technique of Patent Document 1, since there are many liquid levels other than the melting furnace, impurities generated by the reaction between the components in the atmosphere and the molten metal are generated, and there is a concern that the product quality may deteriorate. In addition, since the roll is horizontally cast with the liquid arranged in the vertical direction, the pressure of the liquid material to the roll can be precisely controlled by making the contact pressure of the liquid material different between the upper roll and the lower roll. Is difficult.
Even in the technique of Patent Document 2, there is a concern that the product quality may be deteriorated due to the reaction of the surface because there is no particular device for eliminating the liquid surface of the liquid material. Moreover, since it does not have the function to control the pressing pressure of the liquid material against the roll, when the molten metal surface changes with casting, the heat transfer effect also changes and the product quality deteriorates.
In Patent Document 3, since the atmosphere is controlled by putting the entire apparatus in a chamber to prevent reaction, the equipment becomes huge, and the atmosphere replacement equipment becomes large in order to control the atmosphere in a large space. It will increase.

  This invention is made | formed in view of the said situation, and it is 1st to provide the continuous casting apparatus which prevented that the reaction material of the liquid material (molten metal) was supplied between rolls, without increasing installation cost. The purpose is. It is a second object of the present invention to provide a continuous casting apparatus capable of precisely controlling the pressing pressure of the liquid material (molten metal) against the roll.

  The continuous casting apparatus of the present invention includes a melting furnace for melting an easily reactive non-ferrous metal or an alloy thereof, and a pair of rolls for cooling and continuously casting a molten metal of the easily reactive non-ferrous metal or an alloy supplied from the melting furnace. A cylindrical molten metal reservoir for storing the molten metal is provided on a gap between the pair of rolls, and the molten metal is disposed between the molten furnace and the molten metal reservoir. A molten metal supply pipe for supplying to the reservoir is provided, and the molten metal supply pipe has a discharge port positioned below a molten metal surface of the molten metal stored in the molten metal reservoir.

  Further, the continuous casting apparatus is characterized in that a melt pressure control means for controlling the extrusion pressure of the melt stored in the melt reservoir is provided.

  Further, in the continuous casting apparatus, a cylindrical tower portion communicating with the molten metal reservoir is connected to the molten metal reservoir, and the molten metal pressure control means is configured to supply molten metal supplied to the molten metal reservoir through the molten metal supply pipe. It is characterized by comprising a molten metal supply device that adjusts the amount and moves the molten metal surface up and down in the tower section.

  In the continuous casting apparatus, a cylindrical tower portion communicating with the molten metal reservoir is connected to the molten metal reservoir, and the molten metal pressure control means is located above the molten metal surface of the molten metal in the upper tower portion. It is characterized by comprising an inert gas supply device for introducing an inert gas and adjusting the extrusion pressure of the molten metal in the tower section.

  Further, in the continuous casting apparatus, the molten metal reservoir is provided with a rectifying device (rectifying plate, diversion box or the like) for adjusting the flow of the molten metal in the molten metal reservoir to the twin rolls. .

  In the continuous casting apparatus, a guide hole is provided between the pair of rolls and below the molten metal reservoir, and guides the molten metal supplied from the molten metal reservoir to the gap between the pair of rolls. A chamber block is provided, and the chamber block is disposed in a non-contact manner with respect to the pair of rolls with a gap between the pair of rolls.

  In the continuous casting apparatus, the easily reactive non-ferrous metal is magnesium.

  According to the continuous casting apparatus of the present invention, the molten metal sent from the melting furnace through the molten metal supply pipe is supplied into the molten metal reservoir from the discharge port located below the molten metal surface stored in the molten metal reservoir. Therefore, it is possible to prevent the molten metal forming the molten metal surface from flowing between the rolls and being subjected to continuous casting while keeping the molten metal surface where reaction is likely to occur. Therefore, it is possible to prevent deterioration of the quality of the continuously cast product obtained by preventing the reactant of the liquid material (molten metal) from being supplied between the rolls without increasing the equipment cost.

1 is a side view schematically showing a first embodiment of a continuous casting apparatus according to the present invention. It is a top view of a twin roll. It is principal part sectional drawing of FIG. It is a top view of a molten metal reservoir. It is a side view which shows typically 2nd Embodiment of the continuous casting apparatus which concerns on this invention. It is principal part sectional drawing of FIG.

Hereinafter, the continuous casting apparatus of the present invention will be described in detail with reference to the drawings. In the following drawings, the scale of each member is appropriately changed to make each member a recognizable size.
FIG. 1 is a side view schematically showing a first embodiment of a continuous casting apparatus according to the present invention, and reference numeral 1 in FIG. 1 is a continuous casting apparatus. The continuous casting apparatus 1 includes a melting furnace 2 for melting an easily reactive non-ferrous metal or an alloy thereof, and a pair of rolls for cooling and continuously casting a molten metal of the easily reactive non-ferrous metal or an alloy supplied from the melting furnace 2. The twin roll 3 made of 3 a, a molten metal reservoir 4 disposed on the twin roll 3, and a tower portion 5 disposed on the molten metal reservoir 4 are configured.

  The melting furnace 2 is a furnace for melting an easily reactive non-ferrous metal or an alloy thereof to be continuously cast, and has a heating device (not shown) that can be heated to a temperature exceeding the melting point of the material to be melted. Yes. Further, the melting furnace 2 is provided with a lid portion 2a for hermetically closing the inside. In order to prevent the molten easily reactive non-ferrous metal or its alloy, that is, the molten metal from reacting in contact with oxygen (air), an inert gas is supplied to the melting furnace 2 and filled therein. A gas supply device 6 is connected.

  The inert gas supply device 6 includes an inert gas supply source 7 and a first inert gas supply pipe 8, and converts the inert gas supplied from the inert gas supply source 7 to the first inert gas. The supply pipe 8 supplies the molten metal 50 in the melting furnace 2 above the molten metal surface 50a. By covering the molten metal surface 50a of the molten metal 50 with the inert gas in this way, the molten metal 50 is prevented from contacting and reacting with oxygen (air).

  Further, the melting furnace 2 is connected to the lid portion 2 a of the molten metal supply pipe 9, and the melting furnace 2 leads the molten metal 50 through the molten metal supply pipe 9 and sends it to the molten metal reservoir 4 on the twin roll 3. It is configured. The molten metal supply pipe 9 is provided through the lid portion 2 a, and the suction port 9 a is disposed sufficiently below the molten metal surface 50 a of the molten metal 50 in the melting furnace 2. As a result, the molten metal supply pipe 9 draws in the molten metal 50 that is not located in the molten metal surface 50a or in the vicinity thereof, that is, the molten metal 50 that does not contain reactants formed by contact with oxygen (air).

  In the present embodiment, the above-described inert gas supply device 6 is used as a molten metal supply device that flows the molten metal 50 into the molten metal supply pipe 9 and sends it to the molten metal reservoir 4 on the twin roll 3. By pressurizing the molten metal surface 50 a of the molten metal 50 in the melting furnace 2 by the inert gas supply device 6, the molten metal 50 can flow into the suction port 9 a of the molten metal supply pipe 9 and can be sent to the molten metal reservoir 4. Note that the molten metal supply device that sends the molten metal 50 in the melting furnace 2 to the molten metal reservoir 4 through the molten metal supply pipe 9 may be formed by, for example, a known pressure feed pump having an electric motor instead of the inert gas supply device 6. Good.

The inert gas supply source 7 of the inert gas supply device 6 includes a gas cylinder or a gas tank for storing an inert gas such as sulfur hexafluoride (SF ₆ ) or argon (Ar), and a pressure feed provided as necessary. Formed by a pump.

  In the twin roll 3, a pair of rolls 3a are arranged in a state of being close to each other horizontally and at the same height with a predetermined gap.

  Moreover, as shown in FIG. 2 which is the top view, the twin roll 3 is provided with the weir 12 at the end surface of a roll longitudinal direction, respectively. These weirs 12 are sealed so that the molten metal 50 supplied on the gap between the pair of rolls 3a does not flow out except in the casting direction.

  Note that a winder (not shown) is provided on the downstream side of the twin rolls 3 to wind up the plate material continuously cast by the pair of rolls 3a.

  The molten metal reservoir 4 is disposed between the pair of rolls 3a constituting the twin roll 3, that is, directly above the gap between the pair of rolls 3a and the vicinity thereof. As shown in FIG. 2, the tubular member having the through-hole 13 for collecting and flowing down the molten metal 50 is used. Here, as shown in FIG. 4, which is a plan view of the molten metal reservoir 4, the molten metal reservoir 4 has a long side in the direction along the rotation axis O direction of the roll 3 a, and is orthogonal to the long side. It is formed in a rectangle whose short side is the direction to be. The length of the long side in the plan view shape is substantially equal to the length of the roll 3a in the rotation axis direction. The length of the short side in the plan view shape is appropriately determined depending on the diameter, rotation speed, and the like of the roll 3a.

  As shown in FIG. 3, a molten metal supply pipe 9 is connected to the molten metal reservoir 4 through a side surface on one long side. The molten metal supply pipe 9 is formed so as to be bent so that the tip end thereof faces downward, and a header 14 is provided at the tip. As shown in FIG. 4, the header 14 is formed to be elongated corresponding to the opening shape of the through hole 13. Thus, by providing the header 14 corresponding to the opening shape of the through hole 13 at the tip of the molten metal supply pipe 9, the molten metal 50 can be evenly supplied to the entire area of the through hole 13. The molten metal reservoir 4, the tower portion 5, the cooling device 19, etc. are heated by a heating coil, a heat transfer wire or the like so as to keep the liquid state so that the metal does not solidify there. Only the roll 3a has a structure in which the molten metal is solidified at a low temperature.

  Further, in this embodiment, a flat plate-like rectifying plate 53 is arranged in the vertical direction along the short side direction in the through hole 13 so that the molten metal 50 supplied in this way flows evenly to the twin roll 3 side. There are several standing. Thereby, the molten metal 50 supplied from the header 14 is evenly flowed down to the twin roll 3 side by the flow being adjusted by the rectifying plate 53.

  A tower section 5 is disposed on the molten metal reservoir 4. The tower portion 5 is formed of a cylindrical portion 15 having a rectangular shape in plan view similar to the molten metal reservoir 4 and a buffer portion 16. The cylindrical portion 15 is a cylindrical body having a rectangular shape in plan view and formed sufficiently higher than the molten metal reservoir 4, and has a through-hole 17 having the same planar shape as the molten metal reservoir 4. The through hole 17 is formed in the same opening shape as the through hole 13 of the molten metal reservoir 4, communicates with the through hole 13, and is continuously arranged. Therefore, the molten metal 50 stored in the molten metal reservoir 4 has its molten metal surface 50 b ascended through the through hole 13 of the molten metal reservoir 4 and reaches the inside of the through hole 17 of the cylindrical portion 15.

  The buffer portion 16 is disposed at the upper end of the cylindrical portion 15 and hermetically closes the upper end side opening of the through hole 17 of the cylindrical portion 15, and has a space portion 18 communicating with the through hole 17 of the cylindrical portion 15 inside. doing. The buffer portion 16 is formed such that the length in the short side direction, that is, the length in the direction orthogonal to the rotation axis O of the roll 3a is longer than that of the cylindrical portion 15. It is larger than the area of the hole 17 in plan view. As a result, even if the amount of the molten metal 50 supplied and stored in the molten metal reservoir 4 rapidly increases and the molten metal surface 50b rapidly rises, the molten metal 50 flows into the space 18 of the buffer unit 16 so that the molten metal 50 flows. The sudden rise of the surface 50b is suppressed.

  Further, the second inert gas supply pipe 11 is connected to the upper lid 16 a of the buffer unit 16. The second inert gas supply pipe 11 is connected to the inert gas supply source 7 shown in FIG. 1, and sends the inert gas supplied from the inert gas supply source 7 into the space portion 18 of the buffer portion 16. . The inert gas sent into the space portion 18 covers the molten metal surface 50b of the molten metal 50 located in the through hole 17 of the cylindrical portion 15, thereby preventing the molten metal 50 from contacting and reacting with oxygen (air). Has been. In addition, a pressure control valve 56 is provided on the upper cover 16a of the buffer unit 16, so that the pressure in the buffer unit 16, that is, the internal pressure on the molten metal surface 50b of the molten metal 50 can be adjusted. Further, a pressure gauge 57 is provided on the upper cover 16a of the buffer unit 16, whereby the pressure in the buffer unit 16 (internal pressure on the molten metal surface 50b of the molten metal 50) can be detected.

The pressure of the molten metal 50 stored in the molten metal reservoir 4 can be controlled by the inert gas supply device 6 having the second inert gas supply pipe 11 and the inert gas supply source 7.
Further, the pressure of the molten metal 50 stored in the molten metal reservoir 4 can also be obtained by the molten metal supply device (inert gas supply device 6) having the first inert gas supply pipe 8 and the inert gas supply source 7 described above. Can be controlled. A molten metal supply device (inert gas supply device 6) having such a first inert gas supply pipe 8 and an inert gas supply source 7, a second inert gas supply pipe 11, and an inert gas supply. The molten metal pressure control means according to the present invention for controlling the pressure of the molten metal 50 stored in the molten metal reservoir 4 is constituted by one or both of the inert gas supply device 6 having the source 7. .

  In the present embodiment, as shown in FIG. 3, a cooling device 19 is disposed under the molten metal reservoir 4 and on the gap between the pair of rolls 3 a. The cooling device 19 is a rectangular cylinder and has a through hole 20. The through hole 20 communicates with the through hole 13 of the molten metal reservoir 4 and is continuously arranged. Accordingly, the molten metal 50 stored in the molten metal reservoir 4 flows down through the through hole 13 of the molten metal reservoir 4, passes through the through hole 20 of the cooling device 19, and is provided on the gap between the pair of rolls 3 a. .

  The cooling device 19 is disposed with a slight gap with respect to the peripheral surfaces of the pair of rolls 3a. Since the molten metal 50 (semi-solidified product 51) is cooled by the cooling device 19 and semi-solidified, it is immediately cooled on the peripheral surfaces of the pair of rolls 3a, so that it hardly touches the outside air (oxygen) and therefore reacts. Without being cast. However, in order to prevent a reaction on the pair of rolls 3a, the inert gas is supplied from the inert gas supply source 7 to the pair of weirs 12 via a third inert gas supply pipe (not shown). It is possible to supply an inert atmosphere on the gap between the pair of rolls 3a. Thus, by making an inert atmosphere on the gap, it is possible to reliably prevent the semi-solid material 51 flowing out of the cooling device 19 from reacting on the gap.

  When the inert gas supply device 6 having the second inert gas supply pipe 11 and the inert gas supply source 7 functions as the molten metal pressure control means, the second inert gas supply pipe 11 causes the buffer unit to The amount of inert gas supplied into 16 is adjusted. Thereby, the pressure in the buffer part 16, ie, the internal pressure on the molten metal surface 50b of the molten metal 50, can be controlled, and the pressure of the molten metal 50 in the molten metal reservoir 4 to which this internal pressure is applied can be controlled. Such control of the internal pressure can be accurately performed by using the pressure gauge 57 and the pressure control valve 56 provided in the buffer unit 16. Therefore, the pressing pressure of the molten metal 50 (semi-solidified product 51) against the peripheral surfaces of the pair of rolls 3a can be precisely controlled.

  When the molten metal supply device (inert gas supply device 6) having the first inert gas supply pipe 8 and the inert gas supply source 7 is made to function as the molten metal pressure control means, the first inert gas is used. The amount of the inert gas supplied to the melting furnace 2 is adjusted by the gas supply pipe 8, and the amount of the molten metal 50 sent to the molten metal reservoir 4 through the molten metal supply pipe 9 is controlled. Thereby, the molten metal surface 50b of the molten metal 50 in the tower part 5 can be raised / lowered, and the water head pressure of the molten metal 50 stored in the tower part 5, the molten metal reservoir 4, and the cooling device 19 can be controlled. Therefore, the pressing pressure of the molten metal 50 (semi-solidified product 51) against the peripheral surfaces of the pair of rolls 3a can be precisely controlled.

  In order to perform continuous casting by the continuous casting apparatus 1 having such a configuration, first, the magnesium alloy is melted in the melting furnace 2. Then, the obtained molten metal 50 is supplied into the through hole 13 of the molten metal reservoir 4 through the molten metal supply pipe 9. The molten metal 50 supplied to the molten metal reservoir 4 by the molten metal supply pipe 9 is supplied so as to be located on the molten metal surface 50b by supplying more than the molten metal 50 flowing down. As a result, the discharge port 9b of the molten metal supply pipe 9 is positioned below the molten metal surface 50b of the molten metal 50, and the molten metal 50 sent from the melting furnace 2 through the molten metal supply pipe 9 is airtight. The molten metal 50 forming the easy molten metal surface 50 b is left as it is or near the molten metal surface 50 b, flows downward from the molten metal surface 50 b, and flows down to the cooling device 19 through the through hole 13.

  When the molten metal 50 is supplied into the molten metal reservoir 4 in this way, the molten metal pressure control means, that is, a molten metal supply device (non-reactor) having the first inert gas supply pipe 8 and the inert gas supply source 7. The pressure of the molten metal 50 stored in the molten metal reservoir 4 is controlled by the inert gas supply device 6) or the inert gas supply device 6 having the second inert gas supply pipe 11 and the inert gas supply source 7. To do. Thereby, as mentioned above, the pressing pressure of the semi-solidified product 51 against the peripheral surfaces of the pair of rolls 3a is precisely controlled to a preset high pressure. Further, since the molten metal surface 50b of the molten metal 50 is positioned in the cylindrical portion 15 of the tower portion 5, a sufficiently large water head pressure is applied to the molten metal 50 stored in the molten metal reservoir 4, and therefore semi-solidified. The pressing pressure of the object 51 is stable without greatly fluctuating.

  The molten metal 50 that has flowed down to the cooling device 19 is cooled by a cooling pipe or the like, and is semi-solidified by being stirred. And the formed semi-solid 51 is guided by the gap between a pair of the rolls 3a to go around. The molten metal 50 (semi-solid 51) guided in the gap in this way is extruded to the peripheral surface of the roll 3a with a precisely controlled pressing pressure, and solidifies and continues through the gap between the rolls 3a. It is cast and formed into a plate material. Therefore, the plate material obtained as a product or a semi-finished product is obtained by winding up the obtained plate material and then cutting the ears on both sides to form the desired dimensions.

  According to the continuous casting apparatus 1 of the present embodiment, the molten metal 50 sent from the melting furnace 2 through the molten metal supply pipe 9 is discharged below the molten metal surface 50 b of the molten metal 50 stored in the molten metal reservoir 4. Since it supplies in the molten metal reservoir 4 from the exit 9b, it prevents that the molten metal 50 which forms the molten metal surface 50b leaving the molten metal surface 50b where reaction is easy to occur flows between the rolls 3a, and is used for continuous casting. be able to. Therefore, since it is a comparatively simple structure, it can prevent the quality fall of the continuous casting product obtained by preventing that the reaction material of the molten metal 50 (liquid material) is supplied between the rolls 3a.

  In particular, even when continuous casting of highly reactive magnesium or an alloy thereof, the reaction can be surely prevented, so that a magnesium-based plate material that is light and has high strength can be manufactured with good quality.

  Further, since the molten metal pressure control means is provided, a pair of rolls of the semi-solid material 51 that has flowed out of the cooling device 19 by controlling the extrusion pressure of the molten metal 50 stored in the molten metal reservoir 4 by the molten metal pressure control means. The pressing pressure on the circumferential surface of 3a can be controlled. Therefore, by performing pressure casting with this pressing pressure set at a preset high pressure, the heat transfer rate from the roll 3a to the molten metal 50 is increased to improve the cooling efficiency, and the heat transfer rate is further increased to the peripheral surface of the roll 3a. It can be made uniform throughout and coagulation can occur evenly to reduce the unevenness of product quality.

  In the case of using a molten metal supply device that adjusts the amount of the molten metal 50 supplied to the molten metal reservoir 4 by the molten metal supply pipe 9 and moves the molten metal surface 50b of the molten metal 50 up and down in the tower section 5 as the molten metal pressure control means. Since the water head pressure of the molten metal 50 can be controlled satisfactorily, the pressing pressure of the semi-solid material 51 against the peripheral surfaces of the pair of rolls 3a can be precisely controlled.

  As the molten metal pressure control means, an inert gas supply device 6 that introduces an inert gas above the molten metal surface 50b of the molten metal 50 in the tower 5 and adjusts the extrusion pressure of the molten metal 50 in the tower 5 is used. If there is, the internal pressure on the molten metal surface 50b of the molten metal 50 can be controlled by adjusting the amount of the inert gas supplied by the second inert gas supply pipe 11, and thereby the molten metal to which the internal pressure is applied. The extrusion pressure of the molten metal 50 in the reservoir 4 can be controlled. Therefore, the pressing pressure of the semi-solid product 51 against the peripheral surfaces of the pair of rolls 3a can be precisely controlled.

  Further, since the flow regulating plate 53 is provided in the molten metal reservoir 4, the flow of the molten metal 50 supplied from the header 14 can be adjusted and can be evenly flowed to the twin roll 3 side, thus preventing unevenness in the quality of the obtained plate material. be able to.

  Moreover, since the cooling device 19 for cooling the molten metal 50 is provided between the pair of rolls 3a, the semi-solidified product 51 preliminarily cooled by the cooling device 19 is surely poured into the twin roll 3 composed of the pair of rolls 3a. Therefore, for example, continuous casting of a wide plate can be easily performed.

  Next, a second embodiment of the continuous casting apparatus according to the present invention will be described. FIG. 5 is a side view schematically showing a second embodiment of the continuous casting apparatus according to the present invention, and reference numeral 30 in FIG. 5 is a continuous casting apparatus. This continuous casting apparatus 30 is different from the continuous casting apparatus 1 shown in FIG. 1 in that a chamber block 31 is provided in place of the weir 12 in order to prevent leakage of the molten metal 50 from the twin roll 3. .

  The chamber block 31 is disposed between the pair of rolls 3a constituting the twin rolls 3 and the rolls 3a, and is a cylindrical body having a rectangular shape in plan view. Therefore, the chamber block 31 is also provided with a guide hole 32 having the same planar view shape as the through hole 13 of the molten metal reservoir 4 and the through hole 20 of the cooling device 19 as shown in FIG.

  The chamber block 31 is disposed in a non-contact manner with respect to the rolls 3a with a gap between the pair of rolls 3a and 3a. And it is being fixed to the cooling device 19 in the state by which this non-contact was maintained.

  The guide hole 32 is formed in the same opening shape as the through hole 20 of the cooling device 19, communicates with the through hole 20, and is continuously arranged. Accordingly, the molten metal 50 (semi-solid material 51), which is stored in the molten metal reservoir 4 and semi-solidified through the cooling device 19, flows down the guide hole 32 of the chamber block 31 and is supplied onto the gap between the pair of rolls 3a. It has come to be.

  As shown in FIG. 5, the side plate portion 31 a of the chamber block 31, that is, the side plate portion 31 a that is arranged in parallel to both end faces in the rotation axis O direction of the roll 3 a and forms a short side in the plan view shape of the chamber block 31, The lower side is formed so as to narrow along the peripheral surface of the roll 3a, and the lower end is arranged close to the gap between the pair of rolls 3a.

  The side plate portion 31a and the side plate portion 31b of the chamber block 31 are arranged on the roll 3a with a lower end surface thereof, that is, a surface facing the peripheral surface of the roll 3a with a gap. Thereby, as described above, the chamber block 31 is disposed in a non-contact manner with respect to the pair of rolls 3a. The gap between the chamber block 31 and the roll 3a is formed so that the sealing property between the chamber block 31 and the roll 3a is sufficiently secured by this gap.

  When continuous casting is performed by the continuous casting apparatus 30 having such a configuration, in particular, the chamber block 31 that guides the molten metal 50 to the gap between the pair of rolls 3a is spaced from the rolls 3a with respect to the rolls 3a. Therefore, the weir 12 is prevented from being consumed or the roll 3a itself is consumed by providing the weir 12 on the end face of the roll 3a as in the first embodiment, for example. Further, by providing the weir 12 on the end face of the roll 3a, impurities and bubbles can be easily caught between them, and the quality of the obtained plate member 40 is not deteriorated.

  Therefore, according to the continuous casting apparatus 30 of this embodiment, the seal structure between the chamber block 31 and the pair of rolls 3a can be formed without causing wear due to wear of the chamber block 31 and the pair of rolls 3a. Therefore, it is possible to continuously cast an easily reactive non-ferrous metal or an alloy thereof with a stable quality without reducing productivity.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.
For example, in the above embodiment, the twin roll 3 is configured such that the pair of rolls 3a and the roll 3a are arranged horizontally and at the same height, but the pair of rolls may be arranged above and below in the vertical direction, You may arrange | position diagonally in steps.

  Moreover, in the said embodiment, although the cooling device 19 was arrange | positioned under the molten metal reservoir 4, the molten metal 50 was pre-cooled and semi-solidified by the cooling device 19, and it was made to use between the rolls 3a, but it goes through the cooling device 19. Alternatively, the molten metal 50 may be provided between the rolls 3a directly from the molten metal reservoir 4 or via the chamber block 31. In that case, the apparatus cost of the continuous casting apparatus can be simplified and the apparatus cost can be reduced.

  In the continuous casting apparatus of the above embodiment, the present invention is particularly applied to continuous casting of magnesium alloy. However, the continuous casting apparatus of the present invention is also suitable for continuous casting of easily reactive non-ferrous metals other than magnesium alloy or alloys thereof. Used for.

DESCRIPTION OF SYMBOLS 1, 30 ... Continuous casting apparatus, 2 ... Melting furnace, 3 ... Twin roll, 3a ... Roll, 4 ... Molten pool, 5 ... Tower part, 6 ... Inert gas supply apparatus (molten supply apparatus), 7 ... Inert gas Supply source, 8 ... first inert gas supply pipe, 9 ... molten metal supply pipe, 11 ... second inert gas supply pipe, 15 ... cylindrical part, 16 ... buffer part, 19 ... cooling device, 31 ... chamber block, 32 ... guide hole, 50 ... molten metal, 50a ... hot water surface, 50b ... hot water surface

Claims (7)

A melting furnace for melting easily reactive non-ferrous metals or alloys thereof;
A twin roll composed of a pair of rolls for cooling and continuously casting a melt of an easily reactive non-ferrous metal or its alloy supplied from the melting furnace,
On the gap between the pair of rolls, a cylindrical molten metal reservoir for collecting the molten metal is provided,
A molten metal supply pipe for supplying the molten metal to the molten metal reservoir is provided between the melting furnace and the molten metal reservoir.
The continuous casting apparatus, wherein the molten metal supply pipe has a discharge port located below a molten metal surface of the molten metal stored in the molten metal reservoir.   2. The continuous casting apparatus according to claim 1, further comprising a melt pressure control means for controlling an extrusion pressure of the melt stored in the melt reservoir. A tubular tower portion connected to the molten metal reservoir is connected to the molten metal reservoir,
The molten metal pressure control means is configured by a molten metal supply device that adjusts the amount of molten metal supplied to the molten metal reservoir by the molten metal supply pipe and moves the molten metal surface up and down in the tower portion. The continuous casting apparatus according to claim 2. A tubular tower portion connected to the molten metal reservoir is connected to the molten metal reservoir,
The molten metal pressure control means is constituted by an inert gas supply device that introduces an inert gas above the molten metal surface of the molten metal in the tower section and adjusts the extrusion pressure of the molten metal in the tower section. The continuous casting apparatus according to claim 2.   The continuous casting apparatus according to any one of claims 1 to 4, wherein the molten metal reservoir is provided with a rectifying device that regulates the flow of the molten metal in the molten metal reservoir to the twin rolls. A chamber block having a guide hole for guiding the molten metal supplied from the molten metal reservoir to the gap between the pair of rolls is provided between the pair of rolls and below the molten metal reservoir.
The continuous chamber according to any one of claims 1 to 5, wherein the chamber block is disposed in a non-contact manner with respect to the pair of rolls with a gap between the pair of rolls. Casting equipment. The continuous casting apparatus according to any one of claims 1 to 6, wherein the easily reactive non-ferrous metal is magnesium.

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