KR200353406Y1 - Ladle Slag Cutting Cone(L.S.C.C) - Google Patents

Abstract

The present invention relates to a ladle slag cutting cone, the ladle slag cutting cone according to the present invention and the metal body located inside the ladle; A fireproof layer provided around the outer periphery of the body, the diameter of which is narrowed from the upper end to the lower end so that the lower end is held toward the exit of the ladle; It is preferably provided between the body and the fire-resistant layer, and a cushioning means for providing an expansion space for the body is stretchable, the buffering means is wrapped around the outer side of the body and flexible with an air layer Preferably, the wrapping member is made of a material, and the buffer means is inserted between the body and the fireproof layer to maintain the body and the fireproof layer spaced apart at room temperature. According to the present invention as described above, when the body is stretched under the influence of the internal temperature of the ladle, a cushioning means such as a wrapping member provided between the body and the fireproof layer is in a molten state and a space in which the body can be expanded. This prevents the breakdown of the fireproof layer, which is why more than 2 hours are typically used inside the ladle During use the circular be maintained in the body is capable of stopping a possible airtight during use time by reducing the glass tangryang in the ladle has an effect of improving the silsuyul.

Description

Ladle Slag Cutting Cone (L.S.C.C)}

The present invention relates to a ladle slag cutting cone, and more particularly to a ladle slag cutting cone capable of maintaining its own shape during use time at a high temperature inside the ladle.

In general, converters are used to refine molten iron from molten steel after the reduction of iron ore is completed in the blast furnace. The molten iron is charged with molten iron and scrap metal in the furnace, and the gas such as oxygen is supplied thereto. In the case of oxygen, in the case of oxygen, the operation of obtaining a clean molten steel is performed by adding aluminum to react the oxygen in the molten steel with aluminum to become aluminum oxide.

The molten steel subjected to the primary refining in the converter is transferred to a ladle to carry out secondary refining such as bubbling.

The molten steel carried by secondary refining in the ladle is transferred to a storage vessel called Tundish, which is located at the inlet of the continuous casting machine and temporarily stores the molten steel, and then the molten steel of the tundish is passed through the continuous casting machine. It is commercialized in such a form.

In other words, the manufacturing process of the steel ingot is produced through the converter → ladle → tundish → continuous casting machine, the most important thing in transferring molten steel to the next process in each process is to minimize the inflow of slag.

In particular, the process of supplying molten steel from the ladle to the tundish has a great influence on the quality of the steel, that is, the production of high purity steel.

The reason is that in the molten state, molten steel placed in the ladle is not only molten steel but also impurity materials such as various slag, so if molten steel is supplied to a continuous casting machine, it is impossible to produce high-quality steel ingots if it comes with slag. Because it is.

For this reason, a method for preventing the leakage of the internal slag is accompanied when the molten steel is moved to the next stage inside each converter, ladle, and tundish.

For this purpose, when the molten steel is moved from the converter in which the first molten steel is manufactured, the spherical check is made of spherical shape so that the slag on the converter floats with the molten steel inside the converter to prevent the slag from flowing into the ladle. The ball is used, and this check ball is to close the exit port when a certain amount of molten steel is discharged from the converter to prevent the accompanying outflow of slag.

However, since the spherical check ball closes the tap by its specific gravity, it does not play a significant role in preventing the slag from leaking out by a kind of vortex phenomenon occurring at the tap.

In addition, the check ball was located at the exit early on, causing a large amount of residual water in the converter, resulting in a loss of molten steel.

It is designed to compensate for this, and it is a stopper with a function such as a check ball to close the tap in the form of an inverted cone to prevent vortex and reduce the residue in the ladle or tundish (Domestic Application No. 20-2002-0002651 / 20- 2002-0018494 and U.S. Patent No. 4614415/4494734) and the like, which stopper has an effect of reducing the residue in the ladle or tundish slightly compared to the previously used check ball.

However, the inverted cone stopper exhibited its own stopping function when a small amount of molten steel was placed inside the ladle, but a problem that the ladle was provided with a large amount of molten steel did not function properly. This is because check cones and stop cone-shaped stoppers are made of metal or alloy, so if they are placed in the ladle for a long time, they will be deformed by the ladle's internal temperature, making it impossible to perform the exact stopping function. Because.

In order to supplement this problem again (check application number: 20-1998-0028016 / 10-2000-0052964 / 20-2001-0012597), etc., the check ball of this type is the center of the iron material inside It is provided with a weight or a metal wire, and provided with a refractory material around the outer side to withstand high temperatures.

In other words, the check ball is provided with a refractory material is designed to prevent the deformation of the central weight located in the center through the refractory material provided on the outside for the purpose of sealing the tap hole in an airtight state. However, when used directly in the field, the intended purpose was not achieved as intended at the time of filing.

The reason is that when the check ball is placed on the ladle, the center of the ladle expands due to the internal temperature of the ladle, causing cracks on the outer refractory material due to the expansion force of the expanded central weight. . For this reason, molten steel penetrates through the part where a crack generate | occur | produced, and deformation | transformation like a conventional thing generate | occur | produces.

The present invention is to solve the above-mentioned problems, the object of the present invention is to prevent the breakage of the refractory layer by accommodating this when the body is stretched under the influence of the internal temperature of the ladle, thereby maintaining the circular shape during use time It is to provide a ladle slag cutting cone capable of an airtight stopper for the tap.

1 is a state diagram of the ladle slag cutting cone according to the present invention located on the ladle.

2 is a perspective view of a ladle slag cutting cone according to the present invention.

3 is a cross-sectional view of the ladle slag cutting cone according to the present invention.

Figure 4 is a cross-sectional view showing an expanded state of the ladle slag cutting cone according to the present invention.

Figure 5 is a state diagram showing an embodiment of a ladle slag cutting cone according to the present invention.

6 and 7 are cross-sectional views showing another embodiment of the ladle slag cutting cone according to the present invention.

8 is a cross-sectional view showing another embodiment of a ladle slag cutting cone according to the present invention.

9 is a cross-sectional view showing an embodiment of a cover of the ladle slag cutting cone according to the present invention.

** Description of the symbols for the main parts of the drawings **

102; Body 104; Ladle

106; Handle bar 108; Molten steel

112; Exit 114; Slag

116; Space 122; 1st fireproof layer

124; Second fire resistant layer 126; cover

130; Lapping member

Ladle slag cutting cone according to the present invention for achieving the above object is a metal body located within the ladle; A fireproof layer provided around the outer periphery of the body, the diameter of which is narrowed from the upper end to the lower end so that the lower end is held toward the exit of the ladle; It is preferably provided between the body and the fire-resistant layer, and a cushioning means for providing an expansion space for the body is stretchable, the buffering means is wrapped around the outer side of the body and flexible with an air layer Preferably, the material is a wrapping member, wherein the buffer means is inserted between the body and the fireproof layer to maintain the body and the fireproof layer spaced apart at room temperature. Is preferably.

The fireproof layer is preferably made of chromite, the fireproof layer is preferably made of aluminum oxide, the fireproof layer is preferably made of zirconium oxide, and the fireproof layer is formed on the outer circumference of the buffer member. Preferably, the formed first fireproof layer and a second fireproof layer formed of a material different from the first fireproof layer around the outer periphery of the first fireproof layer, and the first fireproof layer is preferably made of zirconium oxide, It is preferable that the second fireproof layer is made of aluminum oxide.

In addition, the outer periphery of the fireproof layer is preferably provided with a cover, the cover is preferably coated, the body has one end connected to the body and the other end through the fireproof layer to the opposite of the tap hole It is preferably exposed in the upright direction, the outer circumference is preferably provided with a handle bar wrapped with the wrapping member, according to the cutting cone of the above configuration, when the body is stretched under the influence of the temperature of the ladle between the body and the fireproof layer The shock absorbing means, such as the wrapping member provided in the molten state provides a space for the body to expand, thereby preventing breakage of the fireproof layer, and thus the body even during the use time of 2 hours or more normally used in the ladle. It is possible to maintain the circular shape of the product, so that it is possible to make the airtight stopper during use time and reduce the amount of residue in the ladle. The effect of improving the silsuyul.

Hereinafter, one preferred embodiment according to the present invention will be described in more detail with reference to the drawings, and the same reference numerals shown in each of the drawings indicate the same members having the same function.

As shown in FIGS. 1 to 3, the ladle slag cutting cone 100 (LSCC) according to the present invention has a body 102 floating with the molten steel 108 inside the ladle 104 and an outside of the body 102. It is provided around the side, when the body 102 is located in the ladle 104 is formed in the form of an inverted cone, the diameter becomes narrower from the top to the bottom to maintain the shape of the body 102 by the internal temperature, the bottom is At least one or more fireproof layers 120 maintained on the exit side, and between the body 102 and the fireproof layer 120, the body 102 is located inside the ladle 104, the temperature inside the ladle 104 When the body 102 is stretched by the cushioning means 130 for providing an expansion space to prevent the fire-resistant layer 120 is damaged by the expansion or contraction of the body 102 is provided.

Hereinafter, each component will be described in more detail.

First, the body 102 is located inside the ladle 104 for transporting the molten steel 108 refined in the converter to the casting machine to float together with the molten steel 108, and serves as a center weight due to its own weight. When the molten steel 108 inside the ladle 104 is supplied to the casting machine through the tap hole 112, the slag 114, which is suspended in the upper portion of the molten steel 108, is guided to the tap hole side to prevent the mixing. The outlet 112 is sealed.

To this end, the present invention will be described as a preferred embodiment of the shape of the body 102 in the form of an octagonal inverted cone shape. However, these shapes are for convenience of description and may be changed and used as necessary in the form of polygons other than octagons.

When the upper end of the body 102 is exposed so that one end is connected to the body 102 and the other end is upright in the opposite direction to the outlet 112 of the ladle 104 to position the body 102 inside the ladle 104 There is a handle bar 106 used.

Since the handle bar 106 is used to position the body 102 in the interior of the ladle 104, if a separate device or the like is used in the form of removing the handle bar 106 as shown in FIG. It is possible.

The outer periphery of the body 102 formed in this way is wrapped with a buffer means to a predetermined thickness.

The shock absorbing means may be formed of various materials, but in one embodiment, a material that is easily melted or incinerated when placed inside the ladle 104 is wrapped to surround the entire body 102, for example, a paper material. Or may be a vinyl material, etc., the wrapping member 130 in which the air layer 132 is formed for a more effective function is preferable.

The space 116 in which the lapping member 130 is formed is formed on the outer side of the lapping member 130 by expansion due to heat inside the ladle 104 when the body 102 is located inside the ladle 104 to be described later. Serves to prevent the layer from breaking.

In addition, the outer circumference of the wrapping member 130 when the body 102 is located in the ladle 104 in order to maintain the shape of the body 102 by the internal temperature inverted conical narrower from the top to the bottom At least one or more fireproof layers 120 are formed in the shape and are maintained at the lower end of the tap hole 112.

The fireproof layer 120 is made of a fireproof material, thereby minimizing the transfer of high heat inside the ladle 104 to the body 102 when the body 102 is located inside the ladle 104. This is to preserve the shape of the body 102 in the ladle 104 for a long time in the ladle 104 to effectively perform the function of the stopper for closing the tap hole 112 for the time used in the ladle 104. .

For this function, the fireproof layer 120 is selectively used by processing aluminum oxide (Al₂O₃), zirconium oxide (ZrO₃) or chromite (Cr₂O₃) in powder form, and mixed them as necessary.

When used in combination, for example, zirconium oxide may be 80% to 60% + aluminum oxide 40% to 20% or aluminum oxide 80% to 60% + zirconium oxide 40% to 20%.

When the body 102 is positioned in the ladle 104 in such a state, the temperature inside the ladle 104 is transmitted through the fireproof layer 120 so that the flexible wrapping material 130 is melted and the lapping member ( A predetermined space 116 is formed between the portion where the 130 is formed, that is, between the body 102 and the fireproof layer 120.

Since the flexible wrapping member 130 is in a molten state even at a relatively low temperature, the time required to achieve such a state is achieved within a short time. Thereafter, when the high heat in the ladle 104 is transmitted to the body 102 over time, the body 102 is expanded.

The expanded body 102 is located in the space 116 formed by melting the wrapping member 130 as shown in FIG.

As a result, the expansion force of the body 102 is not transmitted to the fireproof layer 120 so that its shape is preserved, and thus floats while maintaining a circular state in the ladle 104.

Figure 5 shows an embodiment of the ladle slag cutting cone 100 of the present invention, it is not wrapped to wrap the buffer member 130 as the entire outer side of the body 102 as shown in Figures 3 and 4 In some places, between the body 102 and the fireproof layer 120, the spacer 230 is made of paper or resin so that the spaced state thereof is maintained.

In this case, as in the case where the entire body 102 is wrapped, in the case of room temperature, the body 102 and the fireproof layer 120 are kept in a spaced apart state. The space member 230 of paper or resin material is incinerated or melted so that the space 116 therebetween accommodates the expansion of the body 102, thereby blocking the expansion force to the fireproof layer 120.

Figure 6 shows another embodiment of the ladle slag cutting cone 100 of the present invention, the wrapping member 130 is provided with an air layer 132 around the handle bar 106.

As such, the reason for forming the wrapping member 130 around the handle bar 106 is that when the body 102 is positioned inside the ladle 104, the gas generated while the wrapping member 130 is melted is discharged to the outside. It is to.

That is, when the body 102 is located inside the ladle 104 and the lapping member 130 is melted, as shown in FIG. 7, the lapping member 130 formed around the handle bar 106 is also melted to form a handle bar ( Gas is released into the space 116a of the wrapping member 130 that has wrapped the 106.

8 shows another embodiment of the ladle slag cutting cone according to the present invention, and is formed of a plurality of layers of the fireproof layer 120 located outside the lapping member 130.

As described above, when forming a plurality of layers, the first fireproof layer 122 is formed on the outer side of the wrapping member 130, and the second fireproof layer 124 is formed on the outer circumference of the first fireproof layer 122. Is formed.

Forming the fireproof layer 120 in a plurality of layers in this way, to prevent deformation of the body 102 due to breakage of the fireproof layer 120 that may occur when the body 102 is located inside the ladle 104. It is for.

When the plurality of fireproof layers 122 and 124 is formed, even if the second outermost fireproof layer 124 is damaged, the heat transfer inside the ladle 104 is performed by the first fireproof layer 122 formed therein. This is reduced and deformation is prevented.

Here, the first fireproof layer 122 may use zirconium oxide, and the second fireproof layer 124 may use aluminum oxide. On the contrary, the first fireproof layer 122 is formed of aluminum oxide, and the second fireproof Layer 124 may be formed of zirconium oxide.

In addition, chromite can be used to expand the choice.

In addition, when the second fireproof layer 124 is exposed to the air, an outer periphery of the second fireproof layer 124 prevents oxidation due to contact with the air and absorbs moisture contained in the air. 124 is provided with a thin cover 126 to prevent deformation.

In particular, the cover 126 is a ladle 104 in a state in which moisture is absorbed because the second fireproof layer 124 is positioned at room temperature, which may occur when the second fireproof layer 124 is positioned on the ladle 104. ) Is prevented from damage of the second fireproof layer 124 due to evaporation and expansion of moisture absorbed by a sudden high temperature.

9 illustrates an embodiment of the cover 126 formed on the outer side of the second fireproof layer 124, and forms a coating layer 226 by coating.

As such, the present invention is provided with the fireproof layer 120 in the body 102, the transfer of the internal heat is suppressed when positioned in the ladle 104 is minimized the deformation of the body 102. Furthermore, the wrapping member 130 is provided between the body 102 and the fireproof layer 120 so that the space 116 of the molten wrapping member 130 is expanded even if the body 102 expands due to the heat inside the ladle 104. By accommodating this in order to prevent breakage of the outer fireproof layer (120).

Accordingly, it is possible to minimize the residual water in the ladle 104 to improve the error rate, and effectively prevent the slag 114 from being incorporated into the casting machine.

As described above, the ladle slag cutting cone according to the present invention has a certain space between the centrally located body and the fireproof layer formed on the outer side, so that when the ladle is placed in the ladle to prevent breakage of the fireproof layer due to expansion of the body, It has the technical idea of enabling a stable stopping function during service time.

Therefore, using other materials not mentioned, keep the body and the fireproof layer spaced apart at room temperature, and when placed in the ladle, they are incinerated or melted by the internal temperature, and the fireproof layer due to expansion of the body located at the center If the space provided to prevent the breakage of should be considered to be included in the technical scope of the present invention.

According to the present invention as described above, when the body is stretched under the influence of the internal temperature of the ladle, the cushioning means such as a wrapping member provided between the body and the fireproof layer is melted to provide a space for the body to expand, This prevents the breakage of the layer, which allows the body to be kept round for more than two hours of use, which is typically used inside the ladle, allowing for a tight stop during use, reducing the amount of residual water in the ladle and reducing the error rate. It is effective to improve.

In addition, in the case of the cover, when the fireproof layer formed on the outside of the cutting cone is exposed to the air at room temperature, the fireproof layer is prevented from being deformed due to oxidation due to contact with the air and absorption of moisture contained in the air. When the cutting cone is positioned inside the ladle in a state where moisture is absorbed into the fireproof layer by exposure to room temperature, moisture in the absorbed state due to sudden high heat evaporates and expands, thereby preventing the fireproof layer from being damaged.

Claims (12)

A metal body located within the ladle; A fireproof layer provided around the outer periphery of the body, the diameter of which is narrowed from the upper end to the lower end so that the lower end is held toward the exit of the ladle; Ladle slag cutting cone is provided between the body and the fire-resistant layer, characterized in that the cushioning means for providing an expansion space so that the body is stretchable. The ladle slag cutting cone according to claim 1, wherein the shock absorbing means is a flexible wrapping material wrapped around the outside of the body and provided with an air layer. The method of claim 1, wherein the buffer means is a plurality of spacer members made of paper or resin material inserted between the body and the fireproof layer to maintain the body and the fireproof layer spaced apart at room temperature. Ladle slag cutting cone. delete delete delete The fireproof layer of claim 1, wherein the fireproof layer is a first fireproof layer formed around an outer circumference of the buffer member and a second fireproof layer formed of a material different from the first fireproof layer on an outer circumference of the first fireproof layer. Ladle slag cutting cone, characterized in that. delete delete The ladle slag cutting cone according to any one of claims 1, 2, 3 and 7, wherein a cover is provided on the outer circumference of the fireproof layer. 11. The ladle slag cutting cone of claim 10, wherein the cover is coated. The method of claim 11, wherein the body is exposed so that one end is connected to the body and the other end is erected in the opposite direction of the tap through the fireproof layer, the outer circumference is provided with a handle bar wrapped with the wrapping member Ladle slag cutting cone.