MXPA03001402A - Ladle with accumulation cylinder type gas blower for ladle. - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an accumulation cylinder type gas blower which can suppress intrusion of molten metal in a blow plug, improve the durability and prolong the service life, and a ladle having the blower. SOLUTION: The ladle has an accumulation cylinder type gas blower 5 which is attachably/detachably provided on a side or a bottom part of the ladle 1. The accumulation cylinder type gas blower comprises a main pipe 8 forming a gas passage to blow the gas into the ladle from an independent gas supply source 4 via a gas blow plug 3, an accumulation cylinder 7 having the function of accumulating the gas through the main pipe, and a control unit 6 having the function of accumulating the gas in the accumulation cylinder simultaneously with the start of the gas blow through the gas pipe or while blowing the gas and switching the gas accumulation to the gas blowing of the gas accumulated in the accumulation cylinder simultaneously with the completion of the gas blowing through the main pipe. COPYRIGHT: (C)2003,JPO.

Description

COLADA BOILER EQUIPPED WITH GAS BLOWING DEVICE THAT HAS A CUMULAR ACCUMULATOR Field of the Invention The present invention relates to a pouring kettle equipped with a gas blowing device having an accumulator cylinder.

Related Art In general, molten metal after refining in a melting furnace, such as an electric furnace or converter, is transferred to a pouring cauldron for casting cauldron. The pouring cauldron, which is used to contain the molten metal, is made of a metal container whose inner surface is lined with refractory material. It is usually provided with an injection cap embedded in the bottom of the pouring cauldron, the injection plug being connected to an injection passage through which the gas is blown into the molten metal contained in the pouring cauldron, an apparatus The gas source is placed separately and stationary in a factory and supplies gas to the injection passage of the injection cap. Therefore, the gas is blown into the molten metal by means of the injection cap. The blowing of the gas causes the molten metal to be stirred to refine the pouring cauldron thereof. However, during the transfer of the pouring cauldron to the next place for the next process, the blowing of the gas by the previous fixed gas source is interrupted as the pouring cauldron containing the molten metal is separated from the placed gas source. fixedly in the factory. Therefore, the gas can not be provided from the gas source to the molten metal during the transfer. When the gas blowing is interrupted, the molten metal in the pouring cauldron penetrates into the gas passage in the plug. If the molten metal that penetrated freezes in the injection passage, the injection passage and the injection cap are partially or totally clogged with the hardened metal resulting in undesirable situations. To overcome these disadvantages, the pouring kettle has recently been provided with a cylinder that is accumulated with a compressed gas secured on the bottom or side thereof. The use of the ladle provided with the accumulator cylinder with a gas allows the gas to be injected into the ladle while the ladle separated from a fixed source gas source is transferred to the next process . Therefore, even during the transfer of the casting cauldron, the gas in the accumulator cylinder can be fed to the injection passage of the injection plug connected to the casting cauldron and therefore a predetermined level of gas back pressure is established. in the injection passage. This back pressure prevents the molten metal from penetrating into the injection passage, thus eliminating the inconveniences due to clogging of the injection passage. In the same way, recent economic situations strongly demand that the injection plugs used to stir molten steel or others by blowing the gas into the laundry cauldrons must improve productivity and reduce the cost of production, in addition to a high durability and higher quality for the agitated. The characteristics that must be imposed on the injection cap can be summarized as follows: (1) an injection cap must be more durable in service life, (2) an injection cap must have a high gas blowing success rate, and (3) an injection cap must have a blow-off characteristic. gas to cover a metallurgical reaction and a stirring force.

The injection cap is generally classified in a type of plug slot (in which a through hole is formed) which improves the service life and a porous type of plug which attaches importance to the reliability in the bubbling. Each type of plug has its own characteristics, so that each type of plug must be used depending on the operating conditions. For example, unlike the porous type plug, the slot type plug can be manufactured using a dense, castable refractory, compared to the porous type plug , the slot type plug has a low porosity and greater strength, being markedly superior in erosion resistance. In addition, the slot-type plug has many advantages including greater flexibility for the design of a blown gas flow quantity and supply of a large amount of gas flow. However, despite these advantages, the porous type plug has now been used more frequently than the slot type. The reason is that the plug type, groove is easier to be clogged due to the penetration of the metal, which can lead to failures in the blowing of the gas. The pouring cauldron that has reached the end of its useful life is transferred to a maintenance workshop where it is serviced. In the usual way, as part of the maintenance operation, the pouring cauldron is flushed with oxygen gas to remove the penetrating metal and remains inside the plug. Although the porous type plug is capable of blowing gas from its entire surface, the slot type plug has to blow the gas from its thin slots. Removal of the metal in the slot-type plug is more difficult than in the porous-type plug. As a result, the comparison of the time washed with oxygen shows that the slot-type plug requires a longer washing time than the porous type. In the case of the above conventional accumulator cylinder, a volume of gas accumulated in the cylinder has a certain limitation, which is very different from the gas source apparatus. Each gas source apparatus is fixedly located in a factory so that a sufficient amount of the highly compressed gas is supplied for a stable gas flow. Meanwhile, when the accumulator cylinder is used to blow the gas into the injection plug, the gas flow is forced to suppress its lower gas pressure and the smaller gas flow. Said reduced gas pressure and lower gas flow make it impossible to retain a high gas backpressure in the injection passage of the injection plug. Said insufficient back pressure is difficult to completely prevent the molten metal from penetrating into the injection passage. With consideration of the above situations, the inventors of the present were analyzing not only how to accumulate the gas and how to blow the gas in the cases where the accumulator cylinder is used but also how to increase the reliability in the gas blowing inside the plug injection. The results analyzed showed that a gas-blowing device of the cylinder-accumulator type and a pouring cauld equipped with the device could be provided, which has the ability to more safely prevent the molten metal from penetrating into the injection plug, which It has high strength and is highly effective for a longer life of the injection cap.

Brief Description of the Invention A first embodiment of the present invention provides a pouring cauld equipped with a gas blowing device provided with an accumulator cylinder, the gas blowing device comprising: a main line for blowing gas into the pouring cavity by means of a blower plug of gas from a gas supply source placed independently; an accumulator cylinder to accumulate the gas supplied through the main pipeline; and a controller for accumulating the gas inside the accumulator cylinder when gas blowing begins through the main pipe or when the gas is blown, and to start the blowing of the accumulated gas in the accumulator cylinder simultaneously with a termination of blowing gas through the main pipe. A second embodiment of the invention is the pouring kettle configured in such a way that the gas blowing device having the storage cylinder is separable from the pouring cauldron.

A third embodiment of the present invention is the pouring kettle configured so that the gas blowing device having the storage cylinder is secured either in the bottom or on one side of the pouring cauldron. A fourth embodiment of the present invention is the casting kettle configured such that the main pipeline is equipped with a check valve which allows the gas to be blown in a direction towards the injection plug and a three-way valve which allows the the gas is blown inside the pouring cauldron. A fifth embodiment of the present invention is the casting kettle configured in such a way that the controller has a ripple pipe connected both to the main pipe and to the accumulator cylinder, wherein the crimped pipe comprises (a) a first regulating valve placed to allow the gas to flow at least in the direction towards the injection cap, and (b) a pressure reducing valve placed next to the first regulating valve. A sixth embodiment of the present invention is a pouring kettle configured in such a way that a pressure calibrator and a flow meter are in turn placed next to the pressure reducing valve in the direction towards the gas blow stopper.

A seventh embodiment of the present invention is a pouring kettle configured in such a way that a flow regulating valve and a second check valve are in turn placed next to | Pressure gauge and flow meter. An eighth embodiment of the present invention is a pouring kettle configured such that the pouring kettle is configured to be used in a dedicated manner for molten metal including molten steel, cast iron, molten copper and molten aluminum.

Brief Description of the Drawings In the accompanying drawings: Fig. 1 is a sectional view showing a laundry cauld equipped with a gas blowing device provided with an accumulator cylinder according to an embodiment of the present invention; Figure 2 is a block diagram of the gas blowing device of the accumulator cylinder type; Figure 3 shows the pressure changes against the time required to accumulate the gas inside the accumulator cylinder type gas blower device, according to one embodiment; Figure 4 shows the pressure changes and the amounts of gas flow against the time elapsed in the gas discharge from the accumulator cylinder type gas blowing device, according to one embodiment; Figure 5A is a vertical sectional view, taken along a line l-l in Figure 5B, of a slot type plug used as an injection plug used by the gas blowing device, according to one embodiment; and Figure 5B is a plan view of the slot type plug.

Detailed Description of the Preferred Modalities With reference to the accompanying drawings, several preferred embodiments of the present invention will now be described. The penetration of the molten metal into an injection cap and other of an injection cap will be caused due to the static pressure applied by the molten metal itself, in cases where ordinary gas blowing is not carried out when the cauldron casting is in transition, waiting or in operation to cast the molten metal. When a gas is continuously blown into the molten metal from the injection plug at a pressure greater than the static pressure applied by the molten metal, penetration of the molten metal into the injection plug is prevented or reduced. With reference to what is illustrated conceptually in Figure 1, a pouring cauldron 1 will now be described according to the present embodiment. In the present embodiment, the laundry cauld 1 is equipped with a gas blowing device provided with an accumulator cylinder. The pouring cauld 1 is capable of accommodating in the same high temperature molten metal 2 (usually molten steel or cast iron) and a bottom of the pouring cauldron is attached to an injection plug 3 for blowing gas into the molten metal 2 contained in the pouring cauldron 1. The types of gas to be blown into the molten metal 2 include inert gas, such as argon gas or nitrogen gas. A factory is provided with gas supply sources placed in a fixed manner at several separate points determined in advance. Behind the bottom of the laundry cauld 1 is provided with a gas blowing device 5 having an accumulator cylinder. The gas-blowing device 5 is detachably secured, for example, in the lower part of the bottom of the laundry cauld with an accessory, such as screws. As shown in Figure 1, the gas blowing device 5 according to the present embodiment comprises a controller 6 and an accumulator cylinder 7, which are connected in parallel to a main pipe 8 used as a gas passage to execute the blowing ordinary gas. The gas blower device is also provided with a loop pipe that connects the main pipe 8 to the accumulator cylinder 7 so that the cylinder 7 is accumulated in a forced manner and simultaneously with the start of the gas supply. The gas accumulated inside the accumulator cylinder 7 is subjected to the control of the pressure and the amount of flow thereof when the gas passes the controller 6. Therefore the pressure and the amount of gas flow can be easily regulated depending on various conditions of the gas. operation. The flow blower 5 is configured so as to automatically switch from ordinary gas blowing to gas blowing using the accumulator cylinder 5 as an alternative gas supply source, simultaneously with the completion of ordinary gas blowing. Instead of the configuration in which the gas-blowing device 5 is mounted on the bottom of the pouring cauld 1, the device 5 can be mounted on one side of the pouring cauld 1. Referring to Fig. 2 which also shows the According to the present invention, the gas cylinder device of the accumulator cylinder type will now be explained. The main pipe 8 connected to the gas supply source 4 is provided with a main regulating valve 31, which results in the gas being able to flow in a direction towards the injection plug 3 although it is prevented from flowing in the direction opposite to the gas supply source 4. Therefore, the gas is fed to the injection plug 3 through a three-way valve 38, which is also inserted into the main valve 8 near the injection plug 3 more than the main regulating valve 31. With the gas that is fed Ordinary, while the gas blowing device 5 provided with an accumulator cylinder 7 is connected to the gas supply source 4, the gas is supplied continuously to the accumulator cylinder 7 by means of a first check valve 32 installed in the controller 6. Specifically, in cases where the gas is accumulated in the accumulator cylinder 7, a gas is used. subsidiary pipe which branches in a certain position in the course of the main pipe 8. The first regulating valve 32 belonging to the controller 6, which is inserted in the subsidiary pipe, allows the gas to flow through it to the accumulator cylinder 7 where the gas accumulates. The first check valve 32 is subjected to controlled pressure so that the pressure of the gas contained in the accumulator cylinder 7 will be maintained below a predetermined pressure. It is preferred that the accumulator cylinder 7 be provided with a safety valve 393. In comparison, when the gas blowing device 5 is disconnected from the gas supply source 4, the first check valve 32 prevents the gas discharged from the accumulator cylinder 7 is directed towards the main line 8. Specifically, the gas that has been discharged from the accumulator cylinder 7 is supplied to a pressure reducing valve 33, where the gas pressure is reduced to a certain level, the valve 33 which serves as a member of the controller 6. In this embodiment, the gas whose pressure has been reduced is fed to a pressure gauge 34 where its pressure valve is shown, then to a flow meter 35 where its quantity is displayed flow. The gas is then fed to the main line 8 through a flow regulating valve 36 and a second check valve 37, which are inserted to prevent reverse flow of the gas. The pressure gauge 34, the flow meter 35, the flow regulating valve 36 and the second check valve 37 can be removed from the curl, if not necessary according to the design. In regulating the gas flow, it is advantageous if the flow regulating valve 36 is placed, which for example consists of a needle valve. When considering the incoming gas flow from the main pipe 8, it is required to use the second check valve 37. The gas is additionally supplied to the injection plug 3 by means of a three-way valve 38. With reference to 3, the changes in the gas pressure to be accumulated in the accumulator cylinder of the gas-blowing device 5 will now be explained. The gas-blowing device 5 according to the present invention is configured so that it can accumulate the pressure in the cylinder during a period for the ordinary gas blowing operation in which a larger amount of gas supplied from the gas supply source is blown from the injection plug. Because there is a pressure difference between the pressure at the gas supply source and the pressure needed to allow gas to flow through the injection plug, the difference in pressure causes the gas to accumulate in the cylinder.

Figure 3 shows the changes in a gas pressure accumulated in the cylinder during ordinary gas blowing. As shown, when the gas supply source is at a pressure of approximately 10 x 106 Pa, the gas, whose pressure is at approximately 2 x 105 Pa, is blown into the injection plug at a speed of 450 l / min. . The lateral axis in Figure 3 shows the time (seconds), while the vertical axis in it shows the gas pressure (Pa). The graph reveals that the pressure will build up to the pressure at the gas supply source for approximately 20 seconds. A rate of accumulation of gas in the accumulator cylinder depends on the gas permeability of the injection cap. More specifically, if the gas injection cap has a high gas permeability, its accumulation speed will be reduced. On the contrary, when the injection cap has a low gas permeability, its accumulation speed will increase. Either way, the accumulation can be achieved almost up to the pressure of the source. As a result, the gas of a given pressure accumulates in the cylinder 7. The pressure of the gas accumulated in the cylinder 7 can be suitably selected within the range of pressures less than a pressure of the gas supply source 4. a As an example, a pressure in the range of 4 x 105 Pa to 10 x 10 Pa can be selected, although it is not limited to the amount selected from that range.

With reference to figure 4, e | gas blowing from the accumulator cylinder. Figure 4 shows the changes in gas pressure in cases where the gas accumulated in the cylinder is discharged through the injection cap, with the gas supply source having a pressure of approximately 10 x 105 Pa. Figure 4, the lateral axis shows the time (min.), the left vertical axis shows a pressure (Pa), and the right vertical axis shows a quantity of gas blown (liters / minutes). The changes in the amount of gas blown are shown through rectangular marks, while the primary pressure, that is to say the pressure of the source in the cylinder, is represented by round marks. In addition, the secondary pressure, that is, a pressure before the injection cap is expressed through triangular markings. As is evident from the curves shown in Figure 4, both the amount of gas blown and the secondary pressure maintained at its specific values lasts at least 23 minutes and then begins to decrease in accordance with a decrease in primary pressure in the cylinder. The gas blowing lasts approximately 40 minutes and then ends. The amount of gas blown from the accumulator cylinder 7 can be selected in an appropriate manner depending on the conditions that include the amount of molten metal that is contained in the pouring cauldron 1. For example, said amount can be assigned from 1 to 20 liters. per minute. The blowing time can be set, for example, from 5 to 60 minutes. As will be readily understood, the amount of gas blown per unit of time and the time of blowing are not limited to the amounts listed above. In addition, in the event that the gas contained in the accumulator cylinder 7 has low pressure and amount of flow, it is preferable to execute an accumulation operation by connecting the cylinder 7 to the gas supply source 4. This operation allows highly pressurized gas from the gas supply source 4 it accumulates again inside the cylinder 7. Figures 5A and 5B are schematic views showing a slot type plug, which is an example of the injection plug 3 according to the present embodiment . In Figure 5A, a longitudinal sectional view of the slot type plug is illustrated, while a top plan view is shown in Figure 5B. As shown in Figure 5A, the slot type plug, which is made of refractory material, is formed in a trapezoid in section. The slot type plug 51 has a plurality of slots 52, which are formed therethrough to function as gas injection passages. Therefore, the gas that has entered the injection passages is guided along them. The slots 52 are formed so as to pass through in parallel with the longitudinal central axis of the slot-type plug 5.

For example, the slots 52 are formed to connect an upper end surface 53 of the plug 51 to a lower end surface 55 thereof. Therefore, as shown in Figure 5A, the slots 52 have upper end openings 54 to contact the molten metal in the cylinder and lower end openings 56 for introducing the gas. Furthermore, an alternative configuration relating to the slots 52 is that another type of injection plug, for example a porous type plug is mounted on the upper end surface 53 of the slot type plug 51. In this configuration, the slots 52 are also formed to join their upper end openings 54 to blow gas within the porous type plug to their lower end openings 56. As described, the slots 52 are formed in such a manner as to penetrate the slot type plug 51. , resulting in the gas flowing more easily, the resistance against the gas flow is reduced and the loss of pressure becomes lower. As shown in Figure 5B, by way of example, each of the slots 52 is formed to have two long sides 52x that face each other and have two short sides 52y confronting each other. The slots 52 are composed of a large number of grooves formed in a radial direction when viewed in a section perpendicular to the longitudinal axis of the plug. Each of the upper end openings 54 and each of the lower end openings 56 are identical in opening shapes with each other, and are formed to have the two long sides 52x and the two short sides 52y, respectively. Accordingly, because each slot 52 is formed within an elongated strip in the horizontal section, which is advantageous to prevent the molten metal from penetrating into the slot passages, which constitutes a sectional area of all the passages. of grooves formed in the injection cap 3 secured as much as possible. The pouring cauldron in accordance with the present embodiment is applicable to molten metals such as molten steel, cast iron, molten copper, and molten aluminum. As an example, in the case that zero melt is used as the molten metal, the applicable process includes a process of receiving the molten steel in the casting cauldron, a process of refining the casting cauldron for the second refining, a process degassing after the refining of the casting cauldron, a continuous coating process in which the molten steel in the casting cauldron is discharged to a refractory tundish of a continuous casting machine for continuous casting, a slag removal process driven after continuous casting, and a process of washing a gas blower plug with oxygen gas. For the ordinary gas blowing operation, the gas blowing device is connected to the gas supply source 4 placed in each of the stations of a factory, in which the reception process is carried out, the process of refining of the pouring cauldron, the degassing process and the previous continuous casting process. This connection allows the gas supply source 4 to accumulate the gas automatically inside the accumulator cylinder 7, The above process involves a transfer process to transfer the pouring cauldron 1 from the acceptance process to the refining process. cauldron of casting, an additional transfer process to transfer the cauldron of casting 1 from the process of refining the cauldron to the degassing process, and an additional transfer process to transfer the cauldron 1 from the degassing process to the continuous casting process, in addition to the previous ones, the process of slag removal in which the slag remaining in the pouring cauld 1 is emptied by tilting the pouring cauldron 1 from which the molten metal has been discharged into the tundish refractory and the washing process in which deposits such as molten steel waste are removed by spraying n of oxygen gas inside the ladle 1 and the injection plug after the slag is emptied. The gas blowing from the accumulator cylinder 7 is carried out in one or more processes selected from the above processes, transfer processes, slag removal processes and washing process. To remove the blockage in the injection cap, it is preferable to perform a blow operation with a small amount of gas for all the processes of acceptance, transfers, slag removal and washing. In the case where the gas supply source 4 is not placed on the site for the acceptance process, it is easier for the molten steel to become the metal that penetrates into the slots of the injection plug 3. In that In this case, it is preferable to fix the ladle 1 so as to accept the molten steel in the state in which the gas accumulator cylinder 7 is operated to supply gas to the injection plug 3 for gas blowing. In addition, in cases where the source of gas supply 4 is not placed on the site for the continuous casting process, it is preferred that, with the accumulator cylinder 7 driven to provide gas to the injection plug 3, the molten metal in the pouring cauld 1 is transferred to the refractory tundish. An amount of the molten steel in the pouring cauld 1, ie a surface level of the molten steel, will decrease in a final period in the continuous casting process. Therefore, the static pressure due to the molten metal, which is exerted on the injection plug 3, becomes smaller in the final period compared to a starting period in the continuous casting process. Therefore, the supply of the gas to the injection cap 3 from the accumulator cylinder 7 allows the debris to be emptied from the slots. In addition, the gas can be supplied from the accumulator cylinder 7 to the injection plug 3 in the processes of slag removal and / or washing. This supply is also effective to empty the debris in the plug slots. In each of the above processes, a surface level of the molten metal in the pouring cauld 1 determines the static pressure caused by the molten metal (per unit area) exerted on the injection plug 3. the molten metal tries to penetrate inside of the injection plug slots 3 depending on your current molten metal surface level. Therefore, by providing gas back pressure to the grooves (per unit area) equal to or greater than a static pressure of molten metal acting on the grooves enables effective suppression of the penetration of the molten metal into the grooves. In each of the above transfer processes, the accumulator cylinder 7 is driven to supply its accumulated gas to the injection plug 3. The gas blowing from the injection plug 3 will prevent the molten metal from penetrating into the plug slots 3. Therefore, even if the pouring cauldron 1 is transferred after being separated from the gas supply source 4 (ie gas is not supplied from the gas supply source 4 during the transfer), it can be obtain the alternative gas supply from the accumulator cylinder 7. As a result. The slots of the injection cap 3 are released from their obstructions due to the penetration of the molten metal. In the above configuration, there is no need to change the conditions of a gas blowing operation, it is sufficient that the pressure reducing valve and the flow meter in the controller are once subjected to their provisions. Said modification allows the accumulator cylinder to operate for gas blowing under a certain condition at any time. Alternatively, it is also evident in itself that an ordinary transmission / reception apparatus can be used to adjust the pressure reduction valve and / or the flow meter based on a wired or wireless remote operation form. The remote operation is capable of providing the safe handling of the casting kettle containing the molten metal.

Example A slot-type plug, which serves as an injection plug, mounted on the bottom of the pouring kettle was subjected to an examination. Molten steel was used as the molten metal. Two plugs were mounted in the bottom of the pouring cauldron for comparative testing, in which the gas blower device with the accumulator cylinder was joined to a stopper and the oxygen washing was not carried out (under normal conditions said washing would be carried out). On the other hand, the other stopper was not connected to the gas blower device of the accumulator cylinder type, but instead the slot-type stopper underwent the ordinary operation including washing with oxygen gas. The capacity of the accumulator cylinder was 38 liters. A gas supply pressure was 10 x 10s Pa and the pressure reduction valve was set at 3 x 10s Pa. An amount of flow from the gas blower device with the accumulator cylinder was determined to be 10 liters / min. . The results of the examination showed that the slot-type plugs of which the original lengths were 455 mm changed differently between the ordinary operation and the operation according to the present invention. That is to say, the slot-type plug which performed the ordinary operation without the gas blowing device according to the present invention changed into a plug of which the remaining length is 190 mm. In contrast, the slot-type plug which used the gas blowing device according to the present invention within a plug of which the remaining length was 315 mm. Accordingly, the erosion of the slot-type plug according to the present invention was almost reduced to | half of that for the plug to which the ordinary operation is applied. Therefore, it has been found that a remarkable advantage is provided through the present invention. Additionally, the wetting of the molten steel for the slot-type plug was also examined. The results were such that the gas-blowing device according to the present invention showed almost no wetting, while the wetting based on the ordinary operation showed about 50 mm. The pouring cauld equipped with the blower device with the accumulator cylinder according to the present invention prevents the molten metal from penetrating into the injection plug, thus contributing to the reduction in the blowing of scarce gas. In addition, to suppress the penetration of the molten metal, the number of times of oxygen gas washing is reduced. Therefore, it is remarkably advantageous to obtain a longer life of the plug.

Claims (8)

1. A pouring kettle equipped with a gas blowing device provided with a type of storage cylinder, the gas blowing device comprising: a main line for blowing gas into the pouring cavity by means of a gas blow stopper from a source of gas. gas supply placed independently; an accumulator cylinder to accumulate the gas supplied through the main pipeline; a controller for accumulating the gas inside the accumulator cylinder when the gas blowing through the main piping starts or when the gas blowing is carried out, and to start the gas blowing accumulated in the accumulator cylinder simultaneously with a completion of gas blowing through the main pipeline.

2. The laundry cauldron according to claim 1, characterized in that the gas blower device having the accumulator cylinder is separable from the laundry cauldron.

3. The casting cauldron according to claim 1 or 2, characterized in that the gas-blowing device having the accumulator cylinder is secured either on a bottom or on one side of the casting cauldron. The pouring cauldron according to any of claims 1 to 3, characterized in that the main piping is equipped with a check valve that allows the gas to be blown in a direction towards the injection cap and a three-way valve which allows the gas to be blown inside the pouring cauldron. The casting cauldron according to any of claims 1 to 3, characterized in that the controller has a ripple pipe connected both to the main pipe and to the accumulator cylinder, wherein the crimped pipe comprises (a) a first check valve positioned to allow gas to flow at least in the direction toward the injection plug, and (b) a pressure reducing valve placed near the first check valve. The casting cauldron according to claim 5, further comprising a pressure gauge and a flow meter placed in turn near the pressure reducing valve in the direction towards the gas blower cover. The casting cauldron according to claim 6, further comprising a flow regulation valve and a second check valve placed in turn near the pressure gauge and the flow meter. 8. The pouring cauldron according to any of claims 1 to 7, characterized in that the pouring cauldron is configured to be used in a dedicated manner for a