KR102485114B1 - Apparatus and method for removing moisture of mortar from top nozzle of teeming ladle - Google Patents

Abstract

The present invention relates to a mortar moisture removal device and method of a teaming ladle top nozzle, and the mortar moisture removal device of a teaming ladle top nozzle according to an embodiment of the present invention is inserted into a hollow of a teaming ladle top nozzle to set a set temperature maintains the high temperature of the top nozzle, and when exchanging the top nozzle, the high-temperature heating element that dries and removes the moisture of the mortar applied to the top nozzle, and guides the insertion of the high-temperature heating element into the hollow of the top nozzle, and when inserting the high-temperature heating element, It includes an air balance device that adjusts the position and attitude balance between the hollows of the top nozzle.

Description

Teaming ladle top nozzle mortar moisture removal device and method {APPARATUS AND METHOD FOR REMOVING MOISTURE OF MORTAR FROM TOP NOZZLE OF TEEMING LADLE}

The present invention relates to an apparatus and method for removing moisture from mortar in a top nozzle of a teaming ladle, and more particularly, when replacing the top nozzle of a teaming ladle, a high-temperature heating element is inserted into the center of the top nozzle and heated to remove moisture contained in the mortar. It relates to a device and method for removing mortar moisture from a top nozzle of Minladeul.

In order to harden the molten steel produced in the steelmaking process into a slab form in the continuous casting process, the molten steel is stored in the converter facility when tapping, the storage of the molten steel, the work container during the secondary refining, the container for transporting the molten steel, and the continuous casting In the process, a teeming ladle is used to inject molten steel into the tundish.

On the other hand, when the continuous casting process is completed, the teaming raes are recovered. The collected teaming raes are subjected to refractory inspection, top nozzle inspection and replacement work, and are supplied to the converter process to receive molten steel in the converter. Here, the top nozzle serves as an outlet for molten steel during the continuous casting process.

By the way, before supplying the teaming ladles to the converter process, when the top nozzle is exchanged inside the teaming lattice, the upper layer of the filler is sintered due to the moisture contained in the mortar used when attaching the top nozzle. The layer is formed thick. And this causes the impossibility of natural opening in which only the filler is discharged and the molten steel is not discharged when the sliding nozzle of the teaming ladle is opened to start injection in the casting process.

According to this reason, in the past, when using after exchanging the top nozzle of the teaming ladle, in order to prevent the impossibility of natural opening, a separate ladle dryer is put into a separate ladle dryer to remove moisture from the mortar and dried for a certain period of time. .

However, in the case of the mortar moisture drying method using a conventional ladle dryer, there are the following problems.

First, there is a problem in that the input of the ladle to the process must be stopped when the top nozzle is exchanged.

After replacing the top nozzle, it is necessary to dry the moisture contained in the mortar using a ladle dryer. Accordingly, there is a shortage of teaming ladles to be supplied to the converter, and a warming ladle is put in. The temperature drop of the molten steel tapped in the converter occurs severely, causing the temperature at the end of the converter to rise, and a secondary temperature control suitable for continuous casting. In the refining process, an additional temperature raising operation is required. As a result, manufacturing costs may increase and quality defects may increase.

In addition, unlike the process of putting the top nozzle into the process immediately after exchanging the top nozzle, the ladle dryer needs to be kept warm. However, utility costs such as COG (Coke Oven Gas), LNG, air, and electricity required for the operation of the ladle dryer increase. there is. This acts as a factor increasing the manufacturing cost.

In addition, for the warming operation of the ladle dryer, a crane operation is required to move the ladle from the tilting stand to the ladle dryer, and conversely, a crane operation is required to move the warming ladle from the ladle dryer to the tilting table in order to reintroduce the warming ladle. . This causes interference with the operation of another crane for transporting molten steel, wastes electricity required for crane operation, and causes congestion in logistics in the factory, resulting in a decrease in productivity.

As related prior literature, there is Republic of Korea Utility Model Registration No. 20-0178743 (2000.04.15. Publication date), and in the prior art document, a technology related to a top nozzle mounting device of a casting ladle is disclosed.

Korea Utility Model Registration No. 20-0178743

An object of the present invention is to remove mortar moisture from the top nozzle of the teaming ladle, which can solve the conventional technical problems caused by stopping the process input of the ladle in use when exchanging the top nozzle of the teaming ladle and repeatedly operating the process input of the warming ladle. It is to provide an apparatus and method.

Another object of the present invention is to insert and heat the high-temperature heating element in the center of the top nozzle when exchanging the top nozzle of the teaming ladle to remove moisture contained in the mortar by radiant heat of the high-temperature heating element, so that the ladle can be immediately put into the process without going through a drying process. It is to provide a mortar moisture removal device and method of a teaming ladle top nozzle that can be used.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

In order to achieve the above object, according to an aspect of the present invention, in order to remove moisture contained in the mortar after replacing the top nozzle of the teaming ladles, a high-temperature heating element is installed in the center of the exchanged top nozzle after exchanging the top nozzle in the tilting table. By inserting and generating heat, the moisture contained in the mortar of the exchanged top nozzle can be quickly removed using the high-temperature radiant heat generated from the high-temperature heating element, so that the ladle can be immediately put into the process without going through a separate drying process. It is possible to provide a mortar moisture removal device and method of a minladeul top nozzle.

The mortar moisture removal device of the teaming ladle top nozzle according to an embodiment of the present invention is inserted into the hollow of the teaming ladle top nozzle to maintain a high temperature of the set temperature, and is applied to the top nozzle when the top nozzle is exchanged. A high-temperature heating element that dries and removes moisture from the mortar; and an air balance device for guiding insertion of the high-temperature heating element into the hollow of the top nozzle and adjusting a position and attitude balance between the high-temperature heating element and the hollow of the top nozzle when the high-temperature heating element is inserted.

In this case, the high-temperature heating element may have a round bar shape having a cross section smaller than the hollow size of the top nozzle.

In the mortar moisture removal device of the teaming ladle top nozzle according to an embodiment of the present invention, the air balance device includes a main body portion installed upright at a set height from the ground; an arm portion rotatably connected at an upper end of the main body portion; and a high-temperature heating element attachment part coupled to the dark part to hold at least a portion of the high-temperature heating element and fixing the high-temperature heating element.

In addition, the air balance device further includes a base portion connected to a lower end of the body portion and seated on the ground to maintain a standing posture of the body portion.

In addition, the air balance device, located at the upper end of the main body, the controller for controlling the operation of the arm; and a power supply unit located close to the controller and supplying power to the controller.

In the mortar moisture removing device of the teaming ladle top nozzle according to an embodiment of the present invention, the arm part includes: a first arm part connected to a first set length from the upper end of the main body part and formed to be rotatable; and a second arm portion connected to a second set length at an end of the first arm portion and rotatably formed simultaneously or individually with the first arm portion.

In addition, the arm unit further includes a vertical arm unit connected from an end of the second arm unit to a longitudinal direction of the second arm unit.

In this case, the high-temperature heating element attachment part may be coupled to an end of the vertical arm part, and the high-temperature heating element may be connected and fixed in a direction crossing the longitudinal direction of the vertical arm part.

The arm part may further include an extension part for reducing the high-temperature effect of the high-temperature heating element fixed to the high-temperature heating element attachment part by separating an end of the vertical arm part and the high-temperature heating element attachment part by a set distance.

In addition, the arm unit may include a first rotation unit provided between an end of the first arm unit and the second arm unit and allowing rotation of the second arm unit around the end of the first arm unit; and a second pivoting unit provided between an end of the second arm unit and the vertical arm unit and allowing rotation of the vertical arm unit around the end of the second arm unit.

The arm unit may further include an arm control handle formed at one side of the vertical arm unit and configured to adjust a position and posture balance of the high-temperature heating element inserted toward the hollow of the top nozzle.

In the mortar moisture removal device of the teaming ladle top nozzle according to an embodiment of the present invention, the high-temperature heating element may be heated to a set temperature by at least one of voltage and current.

Meanwhile, a method for removing mortar moisture from a teaming ladle top nozzle according to an embodiment of the present invention includes: (a) injecting the recovered teaming ladles after the continuous casting process; (b) checking the top nozzles of the teaming ladles and determining whether the top nozzles are exchanged; (c) exchanging the top nozzle according to a result of determining whether the top nozzle is to be replaced; (d) inserting the high-temperature heating element into the hollow of the exchanged top nozzle and maintaining the high-temperature heating element at a set temperature; and (e) using high-temperature heat from the high-temperature heating element to dry and remove moisture from the mortar applied to the top nozzle when the top nozzle is exchanged.

In the mortar moisture removal method of the teaming ladle top nozzle according to an embodiment of the present invention, in the step (d), an air balance device may be used when inserting the high-temperature heating element into the hollow of the exchanged top nozzle.

According to the present invention, after exchanging the top nozzle of the teaming ladle, in order to remove the mortar moisture in the top nozzle, the conventional drying process in which the input of the ladle must be stopped and dried can be omitted.

In particular, according to the present invention, the drop in the temperature of the molten steel due to the cooling of the ladle refractory material can be reduced, thereby suppressing the rise in the end point temperature and end point temperature of the converter. In the conventional case, after replacing the top nozzle, the moisture contained in the mortar was dried using a ladle dryer, but the temperature drop of the molten steel tapped in the converter was severe and the temperature at the end point of the converter rose, so that a secondary In the refining process, an additional temperature increase operation was required, leading to concerns about cost increase and unsuitable quality. According to the present invention, the drop in the temperature of the molten steel due to the cooling of the ladle refractory is reduced, thereby suppressing the rise in the temperature at the end point of the converter and the end point temperature, thereby preventing the problem of increasing the temperature at the end point of the converter due to the existing drying process. .

In addition, according to the present invention, the use of the warming ladle is reduced, thereby reducing the use of utilities such as COG (Coke Oven Gas), LNG, air, and electric power used when operating the ladle dryer, thereby reducing manufacturing cost. In the conventional case, after replacing the top nozzle, the ladle could not be immediately put into the process, and warming had to be performed in a ladle dryer, but there was a problem in that a number of utility costs increased. According to the present invention, there is an advantage in that the manufacturing cost can be lowered by significantly reducing the amount of utility used.

In addition, according to the present invention, there is an advantage in that the movement of the crane due to the warming operation of the teaming ladles is reduced, so that the logistics condition of the factory can be improved and productivity can be increased. In the prior art, a crane was used to move the ladle from the tilting stand to the ladle dryer for the warming operation of the ladle dryer, and to move the warming ladle from the ladle dryer to the tilting stand to re-insert the warming ladle. Because of this, there was a problem of interference in crane operation, waste of power, and congestion of logistics in the factory. According to the present invention, the use of cranes is completely excluded, thereby improving the logistics status of the factory and increasing productivity. there is

In addition to the effects described above, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.

1 is a flow chart briefly showing a method for removing mortar moisture from a conventional teaming ladle top nozzle.
Figure 2 is a device configuration diagram schematically showing a mortar moisture removal device of a teaming ladle top nozzle according to an embodiment of the present invention.
Figure 3 is a flow chart briefly showing a mortar moisture removal method of the teaming ladle top nozzle according to an embodiment of the present invention.
4 is a schematic diagram briefly showing an air balance device among mortar moisture removal devices of a teaming ladle top nozzle according to an embodiment of the present invention.
5 is a photograph showing an operation of drying moisture with a high-temperature heating element using a mortar moisture removal device and method of a teaming ladle top nozzle according to an embodiment of the present invention.
6 is a photograph showing a top nozzle from which moisture is removed by a high-temperature heating element using a mortar moisture removal device and method of a teaming ladle top nozzle according to an embodiment of the present invention.
7 is a graph of converter endpoint temperature DROP comparison between an embodiment according to the mortar moisture removal method of the teaming ladle top nozzle of the present invention and a comparative example using a conventional ladle dryer.
8 is a graph of temperature drop comparison between B / S to RH movement between an embodiment according to the mortar moisture removal method of the teaming ladle top nozzle of the present invention and a comparative example using a conventional ladle dryer.
9 is a comparison graph of RH non-rising temperature and non-cooling rate between an embodiment according to the mortar moisture removal method of the teaming ladle top nozzle of the present invention and a comparative example using a conventional ladle dryer.
10 is a comparison graph of RH oxygen blowing rate between an embodiment according to the mortar moisture removal method of the teaming ladle top nozzle of the present invention and a comparative example using a conventional ladle dryer.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily carry out the present invention. This invention may be embodied in many different forms and is not limited to the embodiments set forth herein.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification. In addition, some embodiments of the present invention are described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, order, or number of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element is or may be directly connected to that other element, but intervenes between each element. It will be understood that may be "interposed", or each component may be "connected", "coupled" or "connected" through other components.

In addition, in implementing the present invention, components may be subdivided for convenience of explanation, but these components may be implemented in one device or module, or one component may be implemented in a plurality of devices or modules. It may be divided into and implemented.

The Teeming Ladle is used to harden the molten steel produced in the steelmaking process into a slab form in the casting process. It can be used to inject molten steel into a container for transporting molten steel and a tundish in a continuous casting process.

The teaming rags are recovered when the continuous casting process is completed, and the recovered teaming ladles are supplied to the converter process after refractory inspection and top nozzle inspection and replacement work are performed, so that molten steel can be taken in the converter.

The top nozzle is provided inside the teaming nozzle and serves as an outlet for the molten steel during the continuous casting process. However, if there is moisture in the mortar used when replacing the top nozzle, a thick sintered layer is formed on the upper layer of the filler, which opens the sliding nozzle of the teaming ladle to start injection in the casting process. Only the filler is discharged, and the molten steel is not discharged, causing a problem of inability to open naturally.

1 is a flow chart briefly showing a method of removing mortar moisture from a conventional teaming ladle top nozzle. Referring to FIG. 1 , when the injection of the teaming ladles is completed (S11), a step of determining whether the top nozzle needs to be replaced (S12) is performed. At this time, if the replacement of the top nozzle is not required, the teaming rags can be directly used in the process (S13). If it is determined that the top nozzle needs to be replaced in the top nozzle replacement determination step (S12), the teaming ladles requiring top nozzle replacement are excluded from the process operation, and the warming teaming ladles are introduced (S14). Then, when the replacement of the top nozzle is completed (S15), the teaming ladles in which the top nozzle has been replaced are moved to a drying dryer to undergo a drying process, and the teaming ladles can be kept warm (S15). However, there were various problems according to the drying method using the conventional ladle dryer.

The present invention was made to solve the problems of the conventional method, and when exchanging the top nozzle in a tilting table, a high-temperature heating element is inserted into the center of the top nozzle and heat is generated to remove mortar moisture from the exchanged top nozzle using radiant heat of the high-temperature heating element. It provides a mortar moisture removal device and method of a teaming ladle top nozzle that can be used. Therefore, according to the present invention, since the ladle can be immediately put into the process without going through a drying process, various problems caused by the existing drying process can be solved.

Hereinafter, a mortar moisture removal device and method of a teaming ladle top nozzle according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Teaming Ladle Top Nozzle Mortar Moisture Removal Device

2 is a schematic diagram of a device for removing mortar moisture of a teaming ladle top nozzle according to an embodiment of the present invention, and FIG. 3 is a diagram showing the mortar moisture removal of a teaming ladle top nozzle according to an embodiment of the present invention. It is a schematic diagram showing an air balance device among devices.

2 and 3, the mortar moisture removal device 100 of the teaming ladle top nozzle according to an embodiment of the present invention includes a high-temperature heating element 110 and an air balance device 130.

The high-temperature heating element 110 may be inserted into the hollow 21 of the top nozzle 20 provided inside the teaming ladles 10.

The high-temperature heating element 110 can maintain a high-temperature state of a set temperature (eg, 850 degrees, etc.).

For example, the high-temperature heating element 110 may have a circular bar shape with a circular cross section smaller than the size of the hollow 21 of the top nozzle 20 .

The high-temperature heating element 110 is inserted into the hollow 21 of the exchanged top nozzle 20 to maintain a high-temperature state at the set temperature, and quickly and easily dries the moisture of the mortar applied to the top nozzle 20 when the top nozzle is exchanged. can be effectively removed.

In addition, the high-temperature heating element 110 may be electrically heated. For example, the high-temperature heating element 110 may be heated to a set temperature by at least one of voltage and current. Accordingly, the user can easily and quickly adjust the heating operation of the high-temperature heating element 110 through electrical control.

When the high-temperature heating element 110 is inserted through the hollow 21 of the top nozzle 20, the air balance device 130 guides the insertion operation of the high-temperature heating element 110, and the high-temperature heating element 110 being inserted into the top It adjusts the position and posture balance so that it can be stably inserted into the hollow 21 of the nozzle 20.

Accordingly, the operator can easily and accurately insert the high-temperature heating element 110 into the hollow 21 of the top nozzle 20 with little force.

For example, the air balance device 130 includes a base part 131, a body part 132, a power supply part 133, a controller 134, and arm parts 135 and 141.

The main body part 132 refers to a pillar-shaped body installed up and down to have a set height from the ground of the workplace.

The base part 131 is a member connected to the lower end of the body part 132, and the base part 131 may have a shape that is seated on the ground to stably maintain the standing posture of the body part 132.

For example, a plurality of reinforcing rib structures supporting and reinforcing side surfaces of the body portion 132 may be further provided between the base portion 131 and the body portion 132 .

A power supply unit 133 and a controller 134 may be further provided at the upper end of the body unit 132 .

The controller 134 is installed on the top of the main body 132 and can apply control signals necessary for the operation of the arms 135 and 141 and control the entire operation of the air balance device 130 .

The power supply unit 133 refers to a device that supplies power required for the controller 134 and various other driving devices. The power supply unit 133 may be located close to the upper end of the body unit 132 together with the controller 134 .

The upper end of the main body 132 where the power supply 133 and the controller 134 are located is rotated in a horizontal direction so that the first arm 135 to be described later can be rotated to a position desired by the user.

The arm parts 135 and 141 may be rotatably connected at an upper end of the main body part 132 .

The high-temperature heating element attachment part 150 refers to a device that is coupled to the dark part and fixes the high-temperature heating element 110 by gripping or binding at least a portion of the high-temperature heating element 110 .

For example, the arm parts 135 and 141 include a first arm part 135 and a second arm part 141 .

The first arm portion 135 may be connected to a first set length from the upper end of the body portion 132, and may be linked to rotate the body portion 132 in a horizontal direction.

The second arm portion 141 may be connected to the second set length at the end of the first arm portion 135, and may be formed to rotate simultaneously with the first arm portion 135 or rotate individually with the first arm portion 135. can

In addition, in the mortar moisture removal device 100 of the teaming ladle top nozzle according to an embodiment of the present invention, the arm portion crosses the longitudinal direction of the second arm portion from the end of the second arm portion 141 to have a predetermined length vertically. It may further include a vertical arm portion 145 connected to have.

At this time, the high-temperature heating element attachment part 150 may be detachably coupled to the end of the vertical arm part 145 .

For example, the high-temperature heating element attachment part 150 may connect and fix the high-temperature heating element 1100 in a direction crossing the longitudinal direction of the vertical arm part 145, that is, in a horizontal direction.

Referring to FIG. 2, after the replacement of the top nozzle 20 of the teaming ladle 10 is completed, in a state in which the teaming ladle 10 is tilted at 90 degrees, the high-temperature heating element 110 is placed in the center of the top nozzle 20, that is, It can be seen that the moisture of the mortar is quickly dried by heating by inserting it into the hollow 21.

Accordingly, even after the moisture of the mortar is sufficiently dried and removed, the teaming ladles 10 with the top nozzle 20 exchanged can be directly put into the converter process and used.

Meanwhile, in the case of the mortar moisture removal device 100 of the teaming ladle top nozzle according to an embodiment of the present invention, the arm portion may further include an extension portion 151.

The extension part 151 refers to a member coupled by extending a distance between the end of the vertical arm part 145 and the high-temperature heating element attachment part 150 so as to be spaced apart by a set distance.

The extension part 151 has a high temperature thermal effect transferred from the high-temperature heating element 110 fixed to the high-temperature heating element attachment part 150 to the first arm part 135, the second arm part 141, and the vertical arm part 145. transmission can be prevented.

In addition, an arm control handle 160 may be further provided on the vertical arm part 145. When the operator manipulates the arm control handle 160 to adjust the insertion position and posture balance of the high-temperature heating element 110, thermal energy to the operator is reduced. Safety accidents can be prevented by preventing influence from being applied.

Meanwhile, in the case of the mortar moisture removing device 100 of the teaming ladle top nozzle according to an embodiment of the present invention, the arm part may further include a first pivoting part 136 and a second pivoting part 143.

The first rotation part 136 refers to a rotational link portion provided between the end of the first arm part 135 and the second arm part 141, and the second arm part 141 is centered on the end of the first arm part 135. allows it to rotate within a predetermined range.

The second pivoting part 143 may be provided between the end of the second arm part 141 and the vertical arm part 145 . The second pivoting part 143 allows the vertical arm part 145 connected to the end of the second arm part 141 to pivot around the end of the second arm part 141 .

The arm control handle 160 may be formed on one side of the vertical arm part 145 .

The operator manipulates the arm control handle 160 toward the hollow 21 of the exchanged top nozzle 20 provided inside the teaming ladle 10 in a tilted state of 90 degrees to set the temperature (eg, 850 degrees, etc.) It is possible to easily insert the heated high-temperature heating element 110 and maintain the insertion position for a certain period of time.

Accordingly, the moisture of the mortar applied to the top nozzle 20 by the high-temperature radiant heat of the high-temperature heating element 110 can be easily and quickly dried and removed.

How to remove moisture from mortar of teaming ladle top nozzle

4 is a flowchart briefly illustrating a mortar moisture removal method of a teaming ladle top nozzle according to an embodiment of the present invention.

Referring to FIG. 4, the mortar moisture removal method of the teaming ladle top nozzle includes a teaming ladle injection step (S110), a top nozzle exchange determination step (S120), a top nozzle exchange completion step (S140), and a high-temperature heating element insertion step ( S150) and mortar moisture removal step (S160).

Reference numerals of the mortar moisture removal device 100 of the teaming ladle top nozzle in FIGS.

Teaming ladle injection step (S110)

When the continuous casting process is completed, the teaming ladles 10 are recovered, and the recovered teaming ladles 10 are inspected for refractories and top nozzles. To this end, it corresponds to a step in which the teaming ladles 10 are injected into the prepared equipment (eg, a tilting table, etc.).

Determining whether to replace the top nozzle (S120)

When the teaming ladles 10 are injected, the top nozzle 20 is inspected, and if necessary, the top nozzle 20 is replaced. This step corresponds to a step of determining whether the top nozzle 20 needs to be replaced. Here, the top nozzle serves as an outlet for molten steel during the continuous casting process.

If it is determined that the replacement of the top nozzle 20 is unnecessary in the step of determining whether or not to replace the top nozzle (S120), the teaming ladles 10 whose top nozzle 20 has been inspected are processed (eg, converter process, etc.) can be used for That is, the step of using the Teaming Ladle process (S130) may be performed.

Top nozzle exchange completion step (S140)

In the previous step, if it is determined that the top nozzle 20 of the teaming ladle 10 needs to be replaced, the top nozzle 20 is replaced with a new one, and through this step, the top nozzle replacement is completed. can

On the other hand, in this step, when the top nozzle 20 is attached during the replacement of the top nozzle 20 of the teaming ladle 10, the adhesion between the top nozzle 20 and the refractory of the teaming ladle 10 and the outflow of molten steel are prevented. For the purpose of preventing this, mortar containing a large amount of moisture is applied.

However, in this step, the moisture contained in the applied mortar should be removed. If the moisture cannot be sufficiently removed, when using the teaming ladle 10 with the top nozzle 20 exchanged, natural openings in the continuous casting process cause impotence.

According to the present invention, radiant heat from a high-temperature heating element can be used to remove moisture from the applied mortar when the top nozzle 20 is replaced.

High-temperature heating element insertion step (S150)

In this step, when replacing the top nozzle 20, the high-temperature heating element 110 heated to a set temperature is inserted into the central part of the top nozzle 20, that is, the hollow part, in order to remove moisture from the applied mortar.

Mortar moisture removal step (S160)

In this step, by using the high-temperature radiant heat of the high-temperature heating element 110 inserted into the center of the top nozzle 20, moisture in the mortar applied when the top nozzle 20 is exchanged can be removed in a simple and quick process. 5 is a photograph showing an operation of drying and removing mortar moisture with a high-temperature heating element. 6 is a photograph showing the top nozzle from which mortar moisture has been removed using radiant heat from the high-temperature heating element through this step.

On the other hand, performance verification of the mortar moisture removal device and method of the teaming ladle top nozzle according to an embodiment of the present invention was performed as follows.

[Table 1]

Table 1 is the result of measuring the moisture after applying mortar to the top nozzle under the same conditions as the operation and drying the moisture using a high-temperature heating element in a prepared box (when the moisture content of the moisture meter is 15% or more, it is displayed as out of range) .

It was confirmed that when the temperature of the high-temperature heating element is maintained at 850 degrees, good results can be obtained with an average moisture content of 4.2% after 20 minutes.

[Table 2]

Table 2 is an evaluation of the moisture content when the moisture of the mortar is removed by the existing ladle dryer drying method. When dry, an average moisture content of 5.7% was measured.

[Table 3]

In Table 3, mortar was applied to the top nozzle in an actual operation method, and a test was conducted by inserting a high-temperature heating element into the center of the top nozzle according to an embodiment of the present invention. As a result, it was confirmed that good results can be obtained with a water content of 3.4%, which is significantly lower than the conventional method.

7 is a graph of converter endpoint temperature DROP comparison between an example according to the mortar moisture removal method of the teaming ladle top nozzle according to the present invention and a comparative example using a conventional ladle dryer.

Referring to Figure 7, in the case of the embodiment of the present invention (moisture drying method of mortar using a high temperature heating element), the temperature drop value from the end point temperature to the arrival of B / S (Bubbling Stand) is the conventional comparative example (existing ladle dryer It can be seen that the average result is 0.5 degrees smaller than the moisture drying method using ).

8 is a graph of temperature drop comparison between B / S to RH movement between an embodiment according to the mortar moisture removal method of the teaming ladle top nozzle of the present invention and a comparative example using a conventional ladle dryer.

8, in the case of the embodiment of the present invention (moisture drying method of mortar using a high temperature heating element), the temperature drop value from B / S (Bubbling Stand) to RH arrival is the conventional comparative example (existing ladle dryer It can be seen that the average is 1.3 degrees smaller than the moisture drying method using ).

9 is a RH non-rising, non-cooling rate comparison graph between an embodiment according to the mortar moisture removal method of the teaming ladle top nozzle of the present invention and a comparative example using a conventional ladle dryer.

Referring to FIG. 9, the ratio of non-heating and non-cooling operation during RH operation in the embodiment of the present invention (moisture drying method of mortar using a high-temperature heating element) is compared to the conventional comparative example (moisture drying method using a conventional ladle dryer) It can be seen that the result is about 12% higher than that of

10 is a graph comparing RH oxygen blowing rates between an example according to the mortar moisture removal method of the teaming ladle top nozzle according to the present invention and a comparative example using a conventional ladle dryer.

Referring to FIG. 10, the ratio of oxygen blowing operation during RH operation in the embodiment of the present invention (moisture drying method of mortar using a high-temperature heating element) is 13 compared to the conventional comparative example (moisture drying method using a conventional ladle dryer) It can be seen that the result is about % lower.

As described above, according to the configuration and operation of the present invention, after exchanging the top nozzle of the teaming ladle, in order to remove the mortar moisture in the top nozzle, the conventional drying process in which the input of the ladle must be stopped and dried can be omitted. .

In particular, according to the present invention, the drop in the temperature of the molten steel due to the cooling of the ladle refractory material can be reduced, thereby suppressing the rise in the end point temperature and end point temperature of the converter.

In the conventional case, after replacing the top nozzle, the moisture contained in the mortar was dried using a ladle dryer, but the temperature drop of the molten steel tapped in the converter was severe and the temperature at the end point of the converter rose, so that a secondary In the refining process, an additional temperature increase operation was required, leading to concerns about cost increase and unsuitable quality. According to the present invention, the drop in the temperature of the molten steel due to the cooling of the ladle refractory is reduced, thereby suppressing the rise in the temperature at the end point of the converter and the end point temperature, thereby preventing the problem of increasing the temperature at the end point of the converter due to the existing drying process. .

In addition, according to the present invention, the use of the warming ladle is reduced, thereby reducing the use of utilities such as COG (Coke Oven Gas), LNG, air, and electric power used when operating the ladle dryer, thereby reducing manufacturing cost.

In the conventional case, after replacing the top nozzle, the ladle could not be immediately put into the process, and warming had to be performed in a ladle dryer, but there was a problem in that a number of utility costs increased. According to the present invention, there is an advantage in that the manufacturing cost can be lowered by significantly reducing the amount of utility used.

In addition, according to the present invention, there is an advantage in that the movement of the crane due to the warming operation of the teaming ladles is reduced, so that the logistics condition of the factory can be improved and productivity can be increased.

In the prior art, a crane was used to move the ladle from the tilting stand to the ladle dryer for the warming operation of the ladle dryer, and to move the warming ladle from the ladle dryer to the tilting stand to re-insert the warming ladle. Because of this, there was a problem of interference in crane operation, waste of power, and congestion of logistics in the factory. According to the present invention, the use of cranes is completely excluded, thereby improving the logistics status of the factory and increasing productivity. there is

As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed herein, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made. In addition, although the operational effects according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be recognized.

10: Teaming Ladle
20: top nozzle
21: Top nozzle center (or hollow)
100: Mortar moisture removal device of teaming ladle top nozzle
110: high heat heating element
130: air balance device
131: base part
132: main body
133: power supply
134: controller
135: first dark part
136: first rotational part
141: second dark part
143: second rotational part
145: vertical arm
150: high-temperature heating element attachment
151: extension
160: arm control handle

Claims (14)

A high-temperature heating element inserted into the hollow of the top nozzle of the teaming ladle to maintain a high temperature at a set temperature and drying and removing moisture from the mortar applied to the top nozzle when the top nozzle is replaced; and
An air balance device for guiding the insertion of the high-temperature heating element into the hollow of the top nozzle and adjusting the position and posture balance between the high-temperature heating element and the hollow of the top nozzle when the high-temperature heating element is inserted,
The air balance device includes a main body portion installed upright at a set height from the ground;
an arm portion rotatably connected at an upper end of the main body portion; and
a high-temperature heating element attachment part coupled to the dark part and holding at least a portion of the high-temperature heating element to fix the high-temperature heating element;
Teaming ladle top nozzle mortar moisture removal device comprising a.
According to claim 1,
The high-temperature heating element,
Characterized in that it has a round bar shape with a cross section smaller than the hollow size of the top nozzle
Teaming ladle top nozzle mortar moisture removal device.
delete According to claim 1,
The air balance device,
a base portion connected to a lower end of the body portion and seated on the ground to maintain a standing posture of the body portion;
Mortar moisture removal device of the teaming ladle top nozzle further comprising a.
According to claim 1,
The air balance device,
a controller positioned at an upper end of the main body and controlling an operation of the arm; and
a power supply unit located close to the controller and supplying power to the controller;
Mortar moisture removal device of the teaming ladle top nozzle further comprising a.
According to claim 1,
The dark part,
A first arm portion connected to a first set length from an upper end of the main body portion and formed to be rotatable; and
a second arm portion connected to a second set length at an end of the first arm portion and rotatably formed simultaneously with or separately from the first arm portion;
Mortar moisture removal device of the teaming ladle top nozzle further comprising a.
According to claim 6,
The dark part,
a vertical arm portion connected from an end of the second arm portion to a longitudinal direction of the second arm portion;
Mortar moisture removal device of the teaming ladle top nozzle further comprising a.
According to claim 7,
The high-temperature heating element attachment part,
It is coupled to the end of the vertical arm and fixed by connecting the high-temperature heating element in a direction crossing the longitudinal direction of the vertical arm
Teaming ladle top nozzle mortar moisture removal device.
According to claim 8,
The dark part,
an extension part for reducing the high-temperature effect of the high-temperature heating element fixed to the high-temperature heating element attachment part by spacing a set distance between an end of the vertical arm part and the high-temperature heating element attachment part;
Mortar moisture removal device of the teaming ladle top nozzle further comprising a.
According to claim 7,
The dark part,
a first pivoting unit provided between an end of the first arm unit and the second arm unit and allowing rotation of the second arm unit around the end of the first arm unit; and
a second pivoting unit provided between an end of the second arm unit and the vertical arm unit and enabling rotation of the vertical arm unit around the end of the second arm unit;
Mortar moisture removal device of the teaming ladle top nozzle further comprising a.
According to claim 7,
The dark part,
an arm control handle formed on one side of the vertical arm part and provided to adjust position and posture balance of the high-temperature heating element inserted toward the hollow of the top nozzle;
Mortar moisture removal device of the teaming ladle top nozzle further comprising a.
According to claim 1,
The high-temperature heating element is heated by at least one of voltage and current
Teaming ladle top nozzle mortar moisture removal device.
A mortar moisture removal method of a teaming ladle top nozzle using the mortar moisture removal device of a teaming ladle top nozzle of claim 1,
(a) injecting the recovered teaming raes after the continuous casting process;
(b) checking the top nozzles of the teaming ladles and determining whether the top nozzles are exchanged;
(c) exchanging the top nozzle according to a result of determining whether the top nozzle is to be replaced;
(d) inserting a high-temperature heating element into the hollow of the exchanged top nozzle and maintaining the high-temperature heating element at a set temperature; and
(e) using high-temperature heat from the high-temperature heating element to dry and remove moisture from the mortar applied to the top nozzle when the top nozzle is exchanged;
In the step (d), an air balance device is used when inserting the high-temperature heating element into the hollow of the exchanged top nozzle.
How to remove moisture in mortar from Teaming Ladle top nozzle.
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