Molten metal pouring device

Abstract

To provide a molten metal pouring device equipped with a sensor capable of accurately measuring temperature of molten metal being poured from a ladle.SOLUTION: A molten metal pouring device 1 of the present invention includes: a ladle 2, having a nozzle 21, for storing molten metal; a tilting mechanism 35 for tilting the ladle 2; a moving mechanism for moving the ladle 2 together with the tilting mechanism 35 to a predetermined pouring position; and a temperature sensor 22, provided on the nozzle 21 of the ladle 2 so that a temperature measuring portion is immersed in the molten metal, for measuring the temperature of the molten metal.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a pouring device for pouring stored molten metal. [Background technology]

[0002] Conventionally, in the pouring process of casting, molten metal is poured into a ladle at a melting site, and the ladle is then transported to a pouring machine using a molten metal transport device or the like, and the molten metal is poured into a mold by the pouring machine.

[0003] If the temperature of the molten metal falls below a certain level, problems such as poor flow can occur, so the molten metal is sometimes drained to prevent these problems from occurring. Conversely, if the temperature of the molten metal rises too high compared to the desired temperature, this will consume extra energy, which goes against carbon neutrality.

[0004] There are three methods for measuring the temperature of the molten metal: manually inserting an immersion thermometer into the pouring ladle that receives the molten metal; manually measuring the temperature using a handy reflective thermometer; and measuring the relative temperature using a non-contact thermometer attached to a machine. Manual temperature measurement requires the protective cover to be replaced each time, and creates a poor working environment. Relative temperature measurement using a non-contact thermometer attached to a machine requires changing the calibration line depending on the material and re-calibration periodically. There is a need to reduce manual work and calibration work. Methods for measuring the temperature of the molten metal are disclosed in, for example, Patent Documents 1 and 2.

[0005] Patent Document 1 discloses a method for measuring the temperature of the pouring flow by installing a radiation thermometer at the outlet of the tundish of a stopper-type pouring machine. Patent Document 2 discloses a method for measuring the surface temperature of the molten metal flow at the outlet of the pouring ladle of a tilting-type pouring machine by installing a fiber-optic radiation thermometer. However, radiation thermometers are relative measurements and are affected by fluctuations in the measurement distance and the condition of the measurement surface (especially impurities such as slag on the surface). For this reason, the conventional measurement method had the problem of being unable to accurately measure the temperature of the molten metal stored in the ladle. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2009-204556 [Patent Document 2] Patent Publication No. 2021-102213 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a pouring device equipped with a sensor that can accurately measure the temperature of molten metal poured from a ladle. [Means for solving the problem]

[0008] The pouring equipment of the present invention, which solves the above-mentioned problems, is characterized by comprising a ladle having a nozzle for storing molten metal, a tilting mechanism for tilting the ladle so that the pouring position from the nozzle of the ladle is maintained at a constant position, a moving mechanism for moving the pouring ladle together with the tilting mechanism to a predetermined pouring position, and a temperature sensor with a temperature measuring part immersed in the molten metal and provided on the nozzle of the ladle for measuring the temperature of the molten metal.

[0009] The pouring equipment of the present invention is provided with a temperature sensor at the nozzle of the ladle with the temperature measuring part immersed in the molten metal. With this configuration, the temperature of the molten metal poured from the nozzle can be measured directly. In other words, the temperature of the molten metal can be measured accurately.

[0010] In the pouring equipment of the present invention, it is preferable that the temperature sensor is inserted into the nozzle from the front side of the nozzle that faces downward when tilted, or from the outer peripheral surface of the other side. With this configuration, the temperature measuring part of the temperature sensor can be brought into contact with the molten metal poured from the nozzle, so that the temperature of the molten metal can be measured reliably.

[0011] The pouring equipment of the present invention is preferably installed so that the temperature measuring part of the temperature sensor is always immersed in the molten metal. With this configuration, the temperature measuring part of the temperature sensor is not exposed and is not exposed to the outside air, and the molten metal and the temperature measuring part can be maintained at approximately the same temperature, so that a stable temperature state can be maintained. Therefore, the deterioration of the temperature measurement accuracy can be suppressed.

[0012] In the pouring equipment of the present invention, the temperature sensor is provided with a protective part on the outer periphery of the temperature measuring part, and the protective part is preferably made of a carbon-containing refractory material containing 10% to 30% by weight of SiO2, 4% to 15% by weight of SiC, 15% to 35% by weight of C, and the remainder being one or more selected from Al2O3, MgO, and spinel. With this configuration, the temperature sensor has excellent durability even when used in the nozzle of the pouring equipment. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a front view showing the configuration of the pouring equipment of the embodiment. [Diagram 2] FIG. 2 is a side view showing the configuration of the pouring equipment of the embodiment. [Diagram 3] FIG. 2 is a diagram showing an example of the line configuration of the pouring equipment of the embodiment. [Figure 4] FIG. 2 is a front view showing the ladle of the pouring equipment of the embodiment. [Diagram 5] FIG. 2 is a side view showing the ladle of the pouring equipment of the embodiment. [Figure 6] FIG. 2 is a cross-sectional view showing a configuration in the vicinity of a temperature measuring portion of the temperature sensor according to the embodiment. [Figure 7] 4 shows the temperature measurement results of the temperature sensor of the embodiment. [Figure 8] This is a test device for evaluating the material of the protective tube of a temperature sensor. [Figure 9] FIG. 2 is a block diagram of a control system for the pouring equipment according to the embodiment. [Figure 10] FIG. 2 is a front view showing a ladle of a modified embodiment of the pouring apparatus. [Figure 11] FIG. 2 is a front view showing a ladle of a modified embodiment of the pouring apparatus. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The present invention will be specifically described below using embodiments.

[0015] [Embodiment] As shown in Figures 1, 2 and 3, the pouring equipment 1 of this embodiment has a ladle 2 and a ladle tilting unit 3. As shown in Figure 3, the pouring equipment 1 of this embodiment is an equipment for pouring molten metal into a plurality of molds arranged on a mold line.

[0016] The ladle 2 stores the molten metal to be poured into the mold. The ladle 2 has a main body 20 and a nozzle 21. The main body 20 has a shape similar to a tank for storing the molten metal therein. The nozzle 21 is provided on the side (outer peripheral surface) of the main body 20, and has a groove shape with its upper side protruding radially outward from the outer peripheral surface of the main body 20, from which the molten metal is poured. That is, the upper end (tip) of the nozzle 21 serves as a pouring port. When pouring, the molten metal flows through the nozzle 21 along the direction in which the groove shape extends. The ladle 2 pours the molten metal by tilting the main body 20 so that the pouring port of the nozzle 21 is located lower relative to the main body 20. In this embodiment, the ladle 2 is tilted so that the bottom surface of the nozzle 21, which is approximately groove-shaped, rotates downward to pour the molten metal. Nozzle 21 (and the approximately groove-shaped bottom surface and pouring spout) oscillates along a plane perpendicular to the rotation axis of ladle 2. The front in this embodiment refers to the surface that the bottom surface (outer peripheral surface) of nozzle 21 faces. The nozzle 21 of the ladle 2 is provided with a temperature sensor 22 .

[0017] The temperature sensor 22 is a generally rod-shaped member having a temperature measuring part and a protective tube. The temperature measuring part is located at the tip of the temperature sensor 22. The temperature measuring part measures the temperature of the molten metal. The protective tube is provided on the outer periphery of the temperature measuring part. The protective tube is made of a sintered body having a cylindrical shape with a closed tip, and houses the temperature measuring part inside.

[0018] As shown in Figures 4 and 5, the temperature sensor 22 is fixed to the outer peripheral surface of the generally groove-shaped nozzle 21, and is inserted from the outer peripheral surface toward the inside of the nozzle 21, on the front surface that faces downward when the nozzle 21 is tilted. The base end of the temperature sensor 22 is fixed with its tip portion, which serves as the temperature measuring portion, protruding from the inner peripheral surface of the nozzle 21. The temperature sensor 22 is installed so that the temperature measuring portion is always immersed in the molten metal even when the ladle 2 is tilted. The temperature measuring portion of the temperature sensor 22 is preferably located in the vicinity of the pouring spout of the nozzle 21. The temperature measuring part of the temperature sensor 22 is a temperature measuring means for measuring the temperature of the molten metal. In this embodiment, it is a temperature measuring junction 221 of a thermocouple. The temperature sensor 22 transmits the temperature measurement result to the control device 4.

[0019] The protective tube is formed of a carbon-containing refractory material containing 10% to 30% by weight of SiO2, 4% to 15% by weight of SiC, 15% to 35% by weight of C, and the remainder being one or more selected from Al2O3, MgO, and spinel. The protective tube of this embodiment is formed of this carbon-containing refractory material.

[0020] The temperature measurement characteristics were measured when a temperature sensor with an Al2O3-SiC-SiO2-C protective tube (the vicinity of the temperature measurement part is shown in Figure 6) was immersed in molten metal, and are shown in Figure 7. As shown in Figure 6, the temperature sensor is a temperature measurement probe equipped with a thermocouple 220, an alumina tube 222, and a protective tube 223. The thermocouple 220 has a temperature measurement junction 221. The alumina tube 222 is made of alumina ceramics in the shape of a cylindrical test tube with a bottom, and the thermocouple 220 is arranged inside. The alumina tube 222 has the temperature measurement junction 221 arranged at its tip. A protective tube 223 is arranged around the outer periphery of the alumina tube 222.

[0021] According to the temperature measurement characteristics in Figure 7, the temperature measured stabilizes after 240 seconds (4 minutes), enabling accurate temperature measurement. It can be seen that when the temperature sensor (temperature measurement probe) is immersed in the molten metal, it takes about 240 seconds (4 minutes) for the temperature of the protective tube, etc. to stabilize. Temperature measurement of ladle 2 begins 5 minutes after pouring. Since the temperature sensor is used after it has been sufficiently heated, accurate temperature measurement becomes possible from the moment the ladle begins to be used. The temperature sensor (temperature measuring probe) shown in Fig. 6 has an average durability of 30 hours (maximum 60 hours) under the conditions of use for measuring temperatures in tundishes in continuous casting at steelworks. It is also durable enough for use in ladles.

[0022] The material of the protective tube of the temperature sensor was evaluated, and the test results are shown in Table 1. In the test, first, a rectangular columnar test piece (Example) of Al2O3-SiC-SiO2-C is prepared. Then, rectangular columnar test pieces (Comparative Examples) of Al2O3-SiC-C, MgO-SiC-C, and Spinel-SiC-C are prepared. The lower end of each test piece is immersed in molten cast iron (FC250) kept at 1350 to 1470°C (rectangular columnar test piece stretched in the vertical direction), and each test piece is rotated in a circular motion for 4 hours (the test piece is moved in the circumferential direction to stir the molten metal) (Figure 8). After the rotation, the cross section of the test piece is observed to evaluate the corrosion resistance and oxidation resistance.

[0023] No change in external shape was observed in either the test pieces of the examples or the comparative examples, and no melting damage was confirmed. The test pieces of the examples have sufficient oxidation resistance. In each of the comparative examples, a reaction between the protective tube material and cast iron (the presence of reaction products) was confirmed. In detail, when observing the cross section, discoloration (reaction products) was confirmed from the surface to the inside. From the results of these test pieces, it was confirmed that the examples containing silica (SiO2) had excellent corrosion resistance and oxidation resistance.

[0024] [Table 1]

[0025] The ladle tilting unit 3 has a tilting mechanism that tilts the ladle 2 at a predetermined position to pour molten metal. The tilting mechanism has a mechanism that can move the ladle 2 along three axes, the front-rear axis X, the lifting axis Z, and the tilting axis V, so that the position of the molten metal pouring from the nozzle 21 of the ladle 2 is maintained at a constant position. Specifically, the front-rear axis X, the lifting axis Z, and the tilting axis V move the ladle 2 in the three axial directions so that the position of the molten metal pouring from the nozzle 21 of the ladle 2 is maintained at a constant position. More specifically, the front-rear axis X, the lifting axis Z, and the tilting axis V tilt the ladle 2 so that the tip of the nozzle 21 of the ladle 2 becomes the tilting center of the ladle 2. In other words, the front-rear axis X, the lifting axis Z, and the tilting axis V function as a tilting mechanism that tilts the ladle 2 so that the position of the molten metal pouring from the nozzle 21 of the ladle 2 is maintained at a constant position.

[0026] The ladle tilting unit 3 has a unit base 30, a first frame 32, the ladle 2, a second frame 33, a tilting section 35, a lifting section 34, and a lateral movement section 36. The unit base 30 supports the first frame 32, the ladle 2, the second frame 33, the tilting section 35, and the lifting section 34.

[0027] The ladle tilting unit 3 has a front-rear moving part 31 that moves the unit base 30 horizontally in the X direction (X-axis direction), which is the direction toward and away from the mold. The front-rear moving part 31 is made up of a device that moves the unit base 30, and in this embodiment uses a motor. The front-rear moving part 31 adjusts the position of the ladle 2 in the X direction relative to the mold by moving the unit base 30 in the X direction. The front-rear moving part 31 constitutes one axis (front-rear axis) of the three-axis configuration of the pouring equipment 1.

[0028] The first frame 32 is provided on the traverse movement part 36 (corresponding to the traverse drive part) and extends in the vertical direction (Z direction). The first frame 32 has, for example, a columnar shape. The first frame 32 supports the ladle 2 via the second frame 33.

[0029] The second frame 33 supports the ladle 2. The second frame 33 is supported by the first frame 32. The second frame 33 is moved up and down along the first frame 32 by the lifting unit 34. The lifting unit 34 comprises a device for moving the second frame 33 (and the ladle 2), and in this embodiment uses a motor. The lifting unit 34 constitutes one axis (lifting axis Z) of the three-axis configuration of the pouring equipment 1.

[0030] The second frame 33 supports the tilting part 35. The tilting part 35 is provided on the second frame 33 and tilts the ladle 2. The tilting part 35 tilts the ladle 2 about a rotation axis. The tilting part 35 is a tilting mechanism for tilting the ladle 2, and has a motor in this embodiment. The rotation axis is parallel to the Y direction and passes through the center of gravity of the ladle 2. The tilting part 35 tilts the ladle 2 about a rotation axis parallel to the extension direction of the rail, which is the moving direction of the ladle tilting unit 3. The rotation angle θ of the rotation axis is the tilting angle. The ladle 2 can guide the molten metal from the main body 20 to the nozzle 21 by tilting the tilting part 35, and the molten metal can be poured into the mold 55 through the tip of the nozzle 21. The tilting part 35 constitutes one axis (tilting axis) of the three-axis configuration of the pouring device 1.

[0031] The unit base 30 is placed on the lateral movement unit 36. The lateral movement unit 36 ​​moves the unit base 30 in the Y direction, which is a horizontal direction and a direction parallel to the arranged molds 55. The lateral movement unit 36 ​​is made up of a device for moving the unit base 30, and in this embodiment, a cart is used. The lateral movement unit 36 ​​adjusts the position of the ladle 2 in the Y direction relative to the molds 55 by moving the unit base 30 in the Y direction.

[0032] The pouring equipment 1 of this embodiment has a control device 4 that controls the entire pouring equipment 1. The control device 4 controls and drives the front-rear axis servo motor of the front-rear movement part 31, the traveling servo motor of the lateral movement part 36, the rotation axis servo motor of the tilting part, and the lift axis servo motor of the lifting part. As an example, the control device 4 is configured as a PLC (Programmable Logic Controller). The control device 4 may be configured as a normal computer system including a CPU (Central Processing Unit), main storage devices (examples of storage media) such as RAM (Random Access Memory) and ROM (Read Only Memory), input devices such as a touch panel and a keyboard, output devices such as a display, auxiliary storage devices (examples of storage media) such as a hard disk, etc.

[0033] As a concrete example of the control device 4, a block diagram of the control system for a pouring equipment is shown in Figure 9. On the equipment side there are servo motors for driving each axis, a load cell L, and a temperature sensor. On the control device there are servo amplifiers for each axis, a load cell amplifier, and a processing unit, and the processing unit has an I / O unit, a high-speed counter unit, an A / D -D / A conversion unit, a communications unit, and a central processing unit (CPU). The temperature sensor measures temperature through the A / D conversion unit and the CPU. If necessary, data can also be communicated to an external processing unit through the communications unit.

[0034] [Lane exchange type molten metal transport device] The pouring equipment 1 of this embodiment can be used in a molten metal transport equipment 5 with exchangeable ladle. As shown in FIG. 3, an example of a ladle-changing type molten metal transport apparatus 5 includes a ladle 2, a ladle transport cart 50, a ladle changing apparatus 51, and a mold line 54. The ladle 2 is a ladle used in the pouring equipment 1. The ladle transport cart 50 is a cart on which the ladle 2 is placed. The ladle transport cart 50 is provided so as to be movable between a position where the molten metal from the melting furnace is poured and a ladle changing device 51 (its roller conveyor). The ladle changing device 51 is a device that changes the ladle 2 of the pouring equipment 1. The ladle changing device 51 changes the ladle 2 that stores the molten metal for pouring with the ladle 2 from which the molten metal has been discharged after pouring.

[0035] The ladle changer 51 has a roller conveyor on which the ladle 2 is placed and which transports the ladle 2. The roller conveyor has a first roller conveyor 52 along which the ladle containing the molten metal is transported, and a second roller conveyor 53 along which the ladle from which the molten metal has been poured and discharged is transported. The mold line 54 is formed by arranging a plurality of molds 55 .

[0036] [Operation] In the ladle exchange type molten metal transport equipment 5, the ladle 2 is placed on the ladle transport cart 50, which is then moved to a position to receive the molten metal from the melting furnace, and the molten metal is received in the ladle 2. After pouring, the ladle transport cart 50 (the ladle 2 placed on it) is moved to the ladle exchange equipment 51. In the ladle exchange equipment 51, the ladle 2 is placed on the first roller conveyor 52 and is assembled to the pouring equipment 1.

[0037] The pouring equipment 1, to which the ladle 2 is attached, is moved by the lateral movement unit 36 ​​to a predetermined position where the molten metal can be poured into the mold 55. The forward / backward movement unit 31 and the lifting unit 34 are operated to hold the pouring spout of the nozzle 21 of the ladle 2 at a predetermined position above the mold 55. The tilting part 35 is operated to tilt the ladle 2, and the molten metal is poured into the mold 55. It is preferable that the control device 4 operates the front-rear moving part 31 and the lifting part 34, and maintains the position of the pouring port of the nozzle 21 at a predetermined position.

[0038] In the pouring equipment 1 of this embodiment, when the ladle 2 is tilted to pour the molten metal, the temperature measuring portion of the temperature sensor 22 is immersed in the molten metal in the nozzle 21. Therefore, the temperature of the molten metal poured from the pouring spout is directly measured.

[0039] When pouring into one mold 55 is completed, the ladle 2 is tilted back and the discharge of the molten metal from the ladle 2 is completed. When the pouring device 1 of this embodiment returns the tilt of the ladle 2, the ladle 2 is not tilted back to the upright state, but is tilted back to a tilted state where the molten metal does not discharge from the pouring spout of the nozzle 21. That is, in the pouring device 1 of this embodiment, the ladle 2 is preferably tilted to a tilted state immediately after the pouring is stopped, where the molten metal does not flow from the pouring spout, from the completion of pouring into one mold 55 to the start of pouring into the next mold. In such a tilted state, when pouring into multiple molds, the molten metal always remains in the nozzle 21, so the temperature measuring part of the temperature sensor 22 is always immersed in the molten metal. Therefore, it is possible to always grasp the temperature of the molten metal. The control device 4 acquires the temperature measurement result of the temperature sensor 22. If the temperature of the molten metal falls outside a predetermined temperature range, for example, a signal is sent to stop pouring, or an alert is given to the operator (by sound, display, etc.).

[0040] Next, the pouring device 1 is moved by the lateral movement part 36 to a predetermined position where the molten metal can be poured into another mold 55, and the molten metal is poured in the same manner as above. This operation is repeated to pour the molten metal into a plurality of molds 55 arranged along the mold line 54.

[0041] When pouring is finished and the molten metal in the ladle 2 is gone, the ladle 2 is moved to the ladle changer 51 by the traverse part 36, and the ladle 2 is removed from the pouring equipment 1. The ladle 2 is transported by the second roller conveyor 53 and placed on the ladle transport cart 50, which then moves the ladle 2 to a position where it will receive the molten metal from the melting furnace again, and receives the molten metal from the melting furnace. The above operation is repeated to pour the molten metal into multiple molds 55.

[0042] [Effects of the pouring device 1 of this embodiment] The pouring equipment 1 of this embodiment comprises a ladle 2 having a nozzle 21 for storing molten metal, a tilting section 35 (corresponding to a tilting mechanism) for tilting the ladle 2 so that the pouring position from the nozzle 21 of the ladle 2 is maintained at a constant position, a moving mechanism for moving the ladle 2 together with the tilting section 35 to a predetermined pouring position, and a temperature sensor 22 with a temperature measuring section immersed in the molten metal and provided on the nozzle 21 of the ladle 2 for measuring the temperature of the molten metal.

[0043] In the pouring equipment 1 of this embodiment, the temperature sensor 22 is provided on the nozzle 21 of the ladle 2 with the temperature measuring part immersed in the molten metal. With this configuration, the temperature of the molten metal poured from the nozzle 21 can be measured directly. In other words, the temperature of the molten metal can be measured directly and accurately. In contrast, in the case of a non-contact thermometer, it is sometimes difficult to accurately measure the actual temperature of the molten metal due to the influence of impurities such as slag on the surface of the molten metal.

[0044] In the pouring equipment 1 of this embodiment, the temperature sensor 22 is inserted into the nozzle 21 from the outer circumferential surface of the front of the nozzle 21 that faces downward when tilted. With this configuration, the temperature measuring part of the temperature sensor 22 can be installed so as to be in contact with the molten metal flowing through the nozzle 21, and the temperature of the molten metal can be reliably measured.

[0045] In the pouring equipment 1 of this embodiment, the temperature sensor 22 is installed so that the temperature measuring part is always immersed in the molten metal. With this configuration, the temperature measuring part of the temperature sensor 22 is never exposed, and a decrease in temperature measurement accuracy is suppressed. In more detail, the temperature measuring part of the temperature sensor 22 remains immersed in the molten metal, and the molten metal and the temperature measuring part can be maintained at approximately the same temperature. In other words, the temperature measuring part is no longer in contact with the outside air, etc., and the temperature of the temperature measuring part does not decrease. As a result, the temperature of the protective tube of the temperature sensor 22, etc. can be maintained in a stable state.

[0046] In the pouring equipment 1 of this embodiment, the temperature sensor 22 has a protective part on its outer periphery, and the protective part is made of a carbon-containing refractory material containing SiO2 at a weight ratio of 10% to 30% and SiC at a weight ratio of 4% to 15% and C at a weight ratio of 15% to 35% and the remainder being one or more selected from Al2O3, MgO and spinel. With this configuration, the temperature sensor has excellent durability even when used to measure the temperature of the molten metal flowing through the nozzle 21 of the pouring equipment 1. In particular, the carbon-containing oxide that forms the protective part in contact with the molten metal has excellent resistance to melting and oxidation, and exhibits high durability even when provided on the nozzle 21.

[0047] [Variations] In the above embodiment, the temperature sensor 22 is inserted and fixed from the outer peripheral surface toward the inside on the front surface facing downward when tilted, which is the outer peripheral surface of the nozzle 21 that is approximately groove-shaped, but the fixing position of the temperature sensor 22 is not limited to this embodiment. In this embodiment, as shown in Figs. 10 and 11, the nozzle 21 has a generally groove-shaped outer peripheral surface, and is inserted and fixed inward from the outer peripheral surface to a side surface (an outer peripheral surface other than the above-mentioned front surface) facing the side when tilted.

[0048] In the pouring equipment 1 of this embodiment, the temperature sensor 22 is inserted into the nozzle 21 from the outer peripheral surface of the side surface of the nozzle 21 that faces downward when tilted. With this configuration, the temperature measuring part of the temperature sensor 22 can be installed in the molten metal poured from the nozzle 21, and the temperature of the molten metal can be reliably measured. [Explanation of symbols]

[0049] 1: pouring equipment, 2: ladle, 20: main body, 21: nozzle 21, 22: temperature sensor, 3: ladle tilting unit, 30: unit base, 32: first frame, 33: second frame, 34: lifting section, 35: tilting section, 36: traverse movement section, 4: control device.

Claims

1. a ladle having a nozzle and storing molten metal; a tilting mechanism for tilting the ladle; a moving mechanism for moving the ladle together with the tilting mechanism to a predetermined pouring position; a temperature sensor provided on the nozzle of the ladle so that a temperature measuring portion is immersed in the molten metal, the temperature sensor measuring the temperature of the molten metal; A pouring device comprising:

2. 2. The pouring equipment according to claim 1, wherein the temperature sensor is inserted into the inside of the nozzle from the outer circumferential surface of the front surface of the nozzle facing downward when tilted or from the outer circumferential surface of any other side surface.

3. 2. The pouring equipment according to claim 1, wherein the temperature sensor is provided so that the temperature measuring portion is always immersed in the molten metal.

4. The temperature sensor includes a protective portion on an outer periphery of the temperature measuring portion, The protective part is SiO ２ by weight ratio of 10% to 30% SiC is 4% or more and 15% or less by weight, C is 15% or more and 35% or less by weight, The balance is Al ２ O ３ 2. The pouring equipment according to claim 1, which is made of a carbon-containing refractory material containing one or more selected from the group consisting of magnesium oxide and spinel.

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