WO2007138793A1

WO2007138793A1 - Lance pipe, degasification equipment, container with degasification equipment and watershoot with degasification equipment

Info

Publication number: WO2007138793A1
Application number: PCT/JP2007/058073
Authority: WO
Inventors: Minehiko Ota; Toshiyuki Matsumoto; Kenji Takemoto
Original assignee: Nippon Crucible Co., Ltd.
Priority date: 2006-05-29
Filing date: 2007-04-12
Publication date: 2007-12-06
Also published as: JP2008007848A; JP5247015B2

Abstract

A lance pipe, degasification equipment, container with degasification equipment and watershoot with degasification equipment structured so as to attain efficient degasification of molten metal. There is provided lance pipe (1) for blowing an insoluble gas into molten metal to thereby attain degasification thereof, comprising metal-made pipe main body (10) and coating material (20) of porous refractory covering the pipe main body (10), wherein the pipe main body (10) at its side wall is provided with gas outflow hole (16) covered with the coating material (20).

Description

Specification

Lance pipe, degassing device, container with degassing device and dredging with degassing device

Technical field

The present invention relates to a lance pipe, a degassing device, a container with a degassing device, and a bowl with a degassing device.

Background art

[0002] Conventionally, in the refinement of molten metal, there has been a degassing process in which an inert gas or the like is blown into the molten metal, and hydrogen or the like dissolved in the molten metal is transferred to bubbles of inert gas or the like to be removed. Has been done.

[0003] In order to blow an inert gas or the like into molten metal, for example, a lance pipe as shown in Patent Document 1 is used. As shown in FIG. 7, the lance pipe closes one opening of the gas supply pipe 101, the gas supply pipe 101 that opens at both ends, the refractory material 102 that covers the gas supply pipe 101, and the gas supply pipe 101. And breathable refractory 103 installed. By introducing the inert gas by immersing the lance pipe 100 configured in this manner in the molten metal, the inert gas passes through the breathable refractory 103 and passes through a number of bubbles G from the tip of the lance nove 100. It flows out into the molten metal. Hydrogen or the like dissolved in the molten metal moves into the inert gas bubbles G flowing out from the breathable refractory 103 and is removed from the molten metal.

Patent Document 1: JP-A-2-301526

Disclosure of the invention

Problems to be solved by the invention

[0004] However, when the molten metal degassing process is performed using the lance pipe described above, the degassing process is difficult because it is difficult to spread the bubbles of the inert gas throughout the molten metal. There was a problem that it was difficult to do.

[0005] The present invention has been made to solve such problems, and is equipped with a lance pipe, a degassing processor, and a degassing processor that can efficiently perform degassing of molten metal. An object is to provide a container and a basket with a degasser.

Means for solving the problem

[0006] The object of the present invention is a lance pipe for performing degassing treatment by blowing an insoluble gas into a molten metal, and comprising a metal tube main body and a porous resistant material that covers the tube main body. This is achieved by a lance pipe in which a gas outflow hole covered with the covering material is formed on the side wall of the pipe body.

[0007] Further, in this lance pipe, it is preferable that the tube main body has a bent portion, and the gas outflow hole is formed on a distal end side of the bent portion of the tube main body.

[0008] Further, the coating material includes a base sheet made of glass fiber soaked with a glassy coating agent, and the entire surface of the base sheet is covered with a coating film of the glassy coating agent. Formed, prefer to be! /

[0009] In addition, it is preferable that a porous stopper which is also a porous refractory material is attached to the gas outflow hole, and the porous stopper is covered with the covering material.

[0010] Further, at least a part of the tube main body may be configured by forming a wire mesh member in a cylindrical shape.

[0011] Further, the object of the present invention is a degassing treatment device for performing degassing treatment by blowing an insoluble gas into a molten metal, the metal treatment device main body having an internal space, and the treatment A bubble generating body having a covering material made of a porous refractory material covering the container body, and the bubble generating body is formed with a gas introduction portion for introducing an insoluble gas into the internal space, A gas outflow hole covered with the coating material is formed in the processor main body, and this is achieved by the degassing processor.

[0012] In addition, the bubble generating body is formed in a flat plate shape over the degassing processor, and at least one surface force insoluble gas of the bubble generating body flows out from the gas outflow hole. It is preferred to be formed into.

[0013] Further, it is preferable that the bubble generating body includes a housing portion in which a molten metal is accommodated, and the gas outflow hole is formed so that insoluble gas flows out into the housing portion. ,.

[0014] Further, the bubble generating body includes a transfer portion to which the molten metal is transferred, and the gas flow The outlet hole is preferably formed so that insoluble gas flows out to the transfer section.

[0015] In addition, the coating material is obtained by impregnating a substrate sheet made of glass fiber cover with a glassy coating agent and covering the entire surface of the substrate sheet with a coating film of the glassy coating agent. Formed, prefer to be! /

[0016] In addition, it is preferable that a porous stopper which is also a porous refractory material is attached to the gas outflow hole, and the porous stopper is covered with the covering material.

[0017] Further, it is preferable that at least a part of the processor main body is formed of a wire mesh member.

[0018] Further, the object of the present invention is a container with a degassing device comprising a degassing device and a storage space for storing molten metal, wherein the bubble generator is disposed in the storage space. This is achieved by a container with a degasser.

[0019] Further, the above-mentioned object of the present invention is a scissor with a degassing device comprising a degassing device and a transfer space to which the molten metal is transferred, wherein the bubble generator is disposed in the transfer space. This is achieved by using a scissor with a degasser.

The invention's effect

[0020] According to the present invention, it is possible to provide a lance nove, a degassing device, a container with a degassing device, and a slag with a degassing device that can efficiently perform degassing of molten metal.

Brief Description of Drawings

FIG. 1 is a schematic sectional view of a lance pipe according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the AA cross section of FIG.

FIG. 3 is a schematic cross-sectional view showing a modification of the lance nove shown in FIG.

FIG. 4 is an explanatory diagram for explaining how to use the lance pipe shown in FIG. 1.

FIG. 5 is a schematic sectional view showing another modification of the lance nove shown in FIG.

FIG. 6 is a schematic sectional view showing still another modification of the lance nove shown in FIG.

FIG. 7 is a schematic cross-sectional view showing a conventional lance nove.

FIG. 8 is a schematic cross-sectional view of a degasser according to an embodiment of the present invention.

FIG. 9 is a plan view seen from the direction of arrow B in FIG. 圆 10] FIG. 9 is an explanatory diagram for explaining a method of use when the degassing device shown in FIG. 8 is attached to a container.

[11] FIG. 11 is an explanatory diagram for explaining how to use the degassing device shown in FIG. 8 when attached to the bag.

FIG. 12 is a plan view of the force in the direction of arrow C in FIG.

13] FIG. 9 is a schematic cross-sectional view showing a modified example of the degassing device shown in FIG.

14 is a schematic cross-sectional view showing another modification of the degassing processor shown in FIG.

FIG. 15 is a plan view showing force in the direction of arrow E in FIG.

16 is a schematic cross-sectional view showing still another modification of the degassing processor shown in FIG. Explanation of symbols

1 Lance pipe

10 Tube body

11 Gas introduction pipe

12 Curved part

13 Elbow tube

14 Gas outflow pipe

15 Mounting part

16 Gas outflow hole

20 Coating material

21 Substrate sheet

22 Coating film

31 Ladle

40 Porous stopper

50 Degasser

51 Bubble generator

52 Processor body

53 Interior space

54 Gas introduction part 55 Gas introduction piping

56 樋

70 containers

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the lance pipe of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic sectional view of a lance pipe 1 according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA in FIG. As shown in FIG. 1, the lance pipe 1 includes a metal pipe body 10 having a bent portion 12 and a covering material 20 that covers the pipe body 10.

[0024] The pipe body 10 includes a gas introduction pipe 11 and a gas outflow pipe 14 connected via an elbow pipe 13 constituting the bent portion 12, so that the overall shape is L-shaped in a side view. Is configured. The gas introduction pipe 11, the gas outflow pipe 14 and the elbow pipe 13 are made of a metal material such as ordinary steel, stainless steel or pig iron.

The gas introduction pipe 11 is a pipe-like member having openings at both ends, and one end is connected to the elbow pipe 13. The other end of the gas introduction pipe 11 is provided with an attachment portion 15 for attaching a gas supply pipe extending from an insoluble gas supply source (not shown). Here, the insoluble gas is a concept including a gas that does not dissolve in the molten metal and a gas that is difficult to dissolve in the molten metal. For example, an inert gas such as argon or a gas such as nitrogen or chlorine is used. You can.

[0026] The gas outflow pipe 14 is a pipe-like member that forms the distal end side of the bent portion 12 of the pipe main body 10, and has a bottomed shape with one end closed. The other end of the gas outflow pipe 14 is connected to the epoxy pipe 13. A plurality of gas outflow holes 16 formed at predetermined intervals along the longitudinal direction of the gas outflow pipe 14 are formed in the side wall of the gas outflow pipe 14. The gas outflow hole 16 is covered with a covering material 20. The hole shape and the number of the gas outflow holes 16 are not particularly limited. For example, a circular shape or an elliptical shape can be adopted as the hole shape. Further, the gas outflow hole 16 can be constituted by a single slit 16a as shown in FIG. A configuration in which a gas outflow hole 16 is further formed in a bottom portion 14a provided at one end of the gas outflow pipe 14 may be adopted.

[0027] coating material 20, for example, permeability is ^{^{3. 5 X 10 _14 m 2 ~9}} . 0 X 10 _14 m 2 approximately porous 1 and 2, the base sheet 21 that covers the outer surface of the tube body 10 so as to be wound, and the coating film that covers the surface of the base sheet 21 are formed. 22 and. The above air permeability is a value obtained in accordance with JIS standard R2115 (Test method for air permeability of refractory bricks). The base sheet 21 is made of glass fibers such as a glass sleeve, a glass woven fabric, and a glass non-woven fabric, and examples of the glass composition of the glass fibers include E glass, S glass, and T glass. The glass fiber gaps in the base sheet 21 are pre-impregnated with a heat-resistant glassy coating agent before application to the tube body 10 by dipping or the like. Examples of the heat resistant glassy coating agent include metal oxides such as silica, alumina, alumina'silica, zircon, and zircoyu, and refractory powders that do not easily react with molten metal such as silicon carbide and nitride nitride. Water glass (alkali metal silicate), silica sol, alumina sol, or a mixture thereof in an aqueous solution can be used. The above-mentioned refractory powder is preferably obtained by pulverizing a fibrous material in order to increase the coating strength of the coating material.

[0028] Formation of the coating film 22 on the surface of the substrate sheet 21 is performed by application of a glassy coating agent having heat resistance. The application of the heat-resistant glassy coating agent is preferably repeated a plurality of times while appropriately adjusting the viscosity, which is preferably performed uniformly over the entire surface of the substrate sheet 21. The thickness of the coating film 22 thus obtained from the surface of the base sheet 21 is 2mn! ~ 7mm is preferred ヽ. Examples of the glassy coating agent applied to the surface of the base sheet 21 can be the same as the glassy coating agent impregnated in the base sheet 21.

[0029] Next, a method for removing hydrogen dissolved in the molten metal by blowing an insoluble gas such as nitrogen into the molten metal using the lance pipe 1 configured as above will be described. First, as shown in FIG. 4, a gas supply pipe 30 extending from an insoluble gas supply source (not shown) is connected to the mounting portion 15. Then, lance Neuve 1 is immersed in the molten metal contained in ladle 31 or the like. At this time, in order to efficiently remove hydrogen dissolved in the molten metal, it is preferable to arrange the gas outlet pipe 14 so as to be substantially parallel to the liquid surface S of the molten metal. In order to immerse the lance pipe 1 in the molten metal, it is preferable to use a lifting device 32 such as a lifter or a crane. [0030] Next, the insoluble gas pressurized as the supply source force of the insoluble gas is guided to the lance pipe 1. The insoluble gas is led to the gas outflow pipe 14 through the gas introduction pipe 11 and is led to the plurality of gas outflow holes 16 formed in the gas outflow pipe 14. The insoluble gas introduced into the gas outflow hole 16 is subdivided when passing through the porous coating material 20 and flows out into the molten metal as fine bubbles G from the surface of the coating material 20. The hydrogen dissolved in the molten metal also flows out to the surface 20 of the coating material and moves to the fine bubbles G of the insoluble gas that rises against the molten metal liquid surface S, and from the molten metal liquid surface S to the outside. To be released.

[0031] As described above, according to the lance pipe 1 according to the present embodiment, the side force of the lance nove 1 can be configured so that bubbles of the insoluble gas can flow into the molten metal. It is possible to perform a degassing process. As a result, hydrogen dissolved in the molten metal can be efficiently removed.

In the lance pipe 1 according to the present embodiment, the tube body 10 has the bent portion 12 and the gas outflow hole 16 is formed on the tip side of the bent portion 12 of the tube body 10. The spipe 1 can be easily supported, and the side surface of the lance pipe 1 where insoluble gas bubbles are generated can be easily immersed to an arbitrary depth of the molten metal. Furthermore, since the insoluble gas bubbles generated by the lance pipe 1 can flow into the molten metal from around the same depth of the molten metal, the residence time of the insoluble gas bubbles in the molten metal is made substantially constant. Therefore, the degassing process can be performed more efficiently.

[0033] In addition, since the lance pipe 1 according to the present embodiment includes a metal pipe body 10 in the entire length of the lance pipe 1, an impact during the handling of the lance pipe 1 and a degassing process are provided. It is possible to prevent the lance pipe 1 from being broken by the work load, and to improve the impact resistance and durability of the lance pipe 1.

[0034] Further, the covering material 20 to be coated on the surface of the tube body 10 impregnates the base material sheet 21 made of glass fiber cover with the vitreous coating agent, and the entire surface of the base material sheet 21 is vitreous. Since it is formed by covering with the coating film 22 of the coating agent, it is possible to prevent the coating material 20 from being clogged by the molten metal having poor wettability to the molten metal. As a result, the insoluble matter introduced into the porous covering material 20 through the gas outflow holes 16 is obtained. As a result, it is possible to effectively prevent the occurrence of a situation in which the functional gas cannot pass through the covering material 20, and the lance pipe 1 can be used for a long time. In addition, since the covering material 20 configured in this way is a material having excellent corrosion resistance, it is possible to effectively prevent the lance pipe 1 from being melted and to have some flexibility. Therefore, it is possible to effectively prevent peeling and cracking of the covering material 20 caused by a difference in thermal expansion between the tube body 10 and the covering material 20.

Although one embodiment of the present invention has been described above, the specific aspect of the present invention is not limited to the above-described embodiment. For example, as shown in FIG. 5, the gas flow formed in the gas flow pipe A configuration in which a porous stopper 40 made of a porous refractory material is attached to the outlet 16 can also be adopted. The porous plug 40 is covered with a covering material 20. According to such a configuration, the insoluble gas guided to the gas outflow pipe 14 via the gas introduction pipe 11 passes through the porous plug 40 and then enters the covering material 20 that covers the gas outflow pipe 14. Since it flows out into the molten metal, the force of the insoluble gas that directly presses the coating material 20 can be reduced. As a result, it is possible to prevent the covering material 20 from being peeled off by the pressure of the insoluble gas. Further, as shown in FIG. 6, a porous plug 40 may be attached so as to penetrate the tube body 10. Here, the porous plug 40 is formed by molding and sintering a fireproof powder such as alumina, ^{alumina′silica} , zircon, etc., for example, the air permeability is 4. OX 10 ^_14 m ^{2 to} l 5.0 X It is preferably about 10 ^_14 m ² . This air permeability is a value determined according to JIS standard R2115 (Test method for air permeability of refractory bricks).

[0036] It should be noted that a structure in which at least a part of the force of the porous plug 40 covered with the coating material 20 is exposed to the outside is adopted, and the exposed portion of the porous plug 40 that passes through the lance nove 1 is insoluble gas force. It is also possible to adopt a configuration in which the force also flows directly into the molten metal.

[0037] In addition, at least a part of the tube body 10 in the present embodiment may be configured by forming a wire mesh member into a cylindrical shape. Examples of the wire mesh member include expanded metal and metal mesh panels. For example, when the gas net member is formed in a cylindrical shape to form the gas outflow pipe 14 in the present embodiment, the mesh portion of the metal net member corresponds to the gas outflow hole 16, and therefore the gas outflow hole 16 is separately provided. The lance pipe 1 can be manufactured at a low cost that does not need to be formed. Further, at least a part of the pipe body 10 is made of gold. When the net-like member is formed in a cylindrical shape, distortion between the two due to the difference in the coefficient of thermal expansion between the pipe main body 10 and the covering material 20 is caused by one of the pipe main bodies 10 formed by the metal net-like member. Therefore, it is possible to effectively prevent the covering material 20 from being peeled off or cracked.

In the present embodiment, the pipe body 10 is configured by connecting the gas introduction pipe 11 and the gas outflow pipe 14 via the elbow pipe 13, but for example, a single linear shape is used. The pipe body 10 is configured so that the metal tube is formed to be L-shaped in side view by bending and the gas outflow hole 16 is formed on the tip side of the bent portion 12 of the L-shaped metal tube. Can also

[0039] In the present embodiment, the gas outflow pipe 14 uses a bottomed pipe-shaped member force with one end closed. For example, a pipe-shaped member having openings at both ends is used. In addition, the gas outflow pipe 14 may be configured by attaching a cap that closes one end of the pipe-shaped member.

[0040] Further, according to the present embodiment, the shape of the tube body 10 is configured to be L-shaped when viewed from the side, but is not particularly limited to such a shape. For example, the shape is linear or curved. Can also be configured.

[0041] Next, the degassing apparatus of the present invention will be described with reference to the accompanying drawings. FIG. 8 is a schematic cross-sectional view of a degassing apparatus according to an embodiment of the present invention, and FIG. 9 is a plan view seen from the direction indicated by the arrow B shown in FIG. As shown in FIGS. 8 and 9, the degassing processor 50 includes a bubble generating body 51 and a gas introduction pipe 55.

[0042] The bubble generating body 51 is formed in a flat plate shape having a rectangular shape in plan view, and is made of a metal processing device main body 52 having an internal space 53, and a porous fireproof covering the processing device main body 52. And a covering material 20 made of a material. In the vicinity of the side edge of one surface 51a of the bubble generating body 51, a gas introduction part 54 for introducing an insoluble gas to the internal space 53 of the processor main body 52 is formed, and a gas introduction pipe 55 is connected to the gas introduction part 54. Is connected.

[0043] The processor main body 52 is also formed of a flat plate having a rectangular shape in plan view, and is made of a metal material such as ordinary steel, stainless steel, pig iron and the like. The processor main body 52 is provided with the internal space 53 as described above. A gas introduction part 54 is formed, and is substantially over the entire area of the one surface 52a of the processor body 52. A plurality of gas outflow holes 16 through which the insoluble gas led to the internal space 53 flows out are formed at predetermined intervals. The gas outflow holes 16 are covered with a covering material 20 such as a porous refractory material, and thereby the insoluble gas gas gas outflow holes 16 led to the internal space 53 of the processor main body 52 and the covering are covered. It can flow out from the one surface 51a of the bubble generating body 51 through the material 20. Further, the hole shape and the number of the gas outflow holes 16 are not particularly limited. For example, a shape such as a circular shape in plan view or an elliptical shape in plan view can be adopted as the hole shape. Further, the gas outflow hole 16 can be constituted by a slit. A configuration in which the gas outflow hole 16 is further formed in the other surface 52b of the processing unit main body 52, or a configuration in which the gas outflow hole 16 is further formed in the end surfaces 52c, 52c, 52c, 52c of the processing unit main body 52. It may be adopted.

Since the covering material 20 has the same configuration as that used for the lance pipe 1 described above, detailed description thereof is omitted here.

[0045] The gas introduction pipe 55 is configured by covering a noise member 55a having openings at both ends with a covering material 20, and one end thereof is connected to the gas introduction part 54. The other end of the gas introduction pipe 55 is provided with an attachment portion 55b for attaching a gas supply pipe extending from the insoluble gas supply source, not shown. The pipe-like member 55a constituting the gas introduction pipe 55 is made of a metal material such as ordinary steel, stainless steel, pig iron, and the like.

[0046] The operation of the degassing device 50 configured as described above will be described below. In order to remove hydrogen and the like dissolved in the molten metal using the degasser 50, first, as shown in FIG. 10, the molten metal in the container 70 such as a ladle holding furnace is accommodated. The bubble generating body 51 of the degassing processor 50 is disposed in the accommodating space 70a. At this time, in order to efficiently remove hydrogen and the like dissolved in the molten metal, it is preferable that the other surface 5 lb of the bubble generating body 51 is disposed in contact with the bottom surface of the housing space 70a.

[0047] Thereafter, the molten metal is accommodated in the accommodating space 70a of the container 70, and insoluble gas is supplied to the bubble generating body 51 through the gas introduction pipe 55. The insoluble gas introduced to the bubble generating body 51 passes through the inner space 53 of the processing unit main body 52, the gas outflow hole 16 and the covering material 20 which is also a porous refractory material 51, and the one side 51a of the bubble generating body 51 The almost whole area force becomes a fine bubble G, which is accommodated in the accommodating space 70a of the container 70 and flows out into the molten metal. Hydrogen or the like dissolved in the molten metal flows out from one surface 51a of the bubble generating body 51 and flows into the liquid metal surface S. It moves to fine bubbles G of insoluble gas that rises toward the surface, and is discharged from the liquid surface S of the molten metal to the outside.

[0048] Thus, according to the degassing processor 50 according to the present embodiment, the insoluble gas bubbles G from the substantially entire surface of the one surface 5 la of the bubble generating body 51 formed in a flat plate shape are melted. Since it is configured to flow out into the metal, hydrogen and the like dissolved in the molten metal can be efficiently removed over a wide range.

[0049] Further, since the bubble generating body 51 in the degassing processor 50 according to the present embodiment includes a metal processing body 52 in the interior thereof, due to an impact during handling of the degassing processor 50, It is possible to effectively prevent the bubble generating body 51 from being damaged, and to improve the impact resistance and durability of the degassing processor 50.

[0050] In addition, since the covering material 20 to be coated on the surface of the processor main body 52 has the same configuration as that in the lance noop 1 described above, it depends on the molten metal having poor wettability with respect to the molten metal. The clogging of the covering material 20 can be prevented. As a result, it is possible to effectively prevent the occurrence of a situation in which the insoluble gas guided to the porous coating material 20 through the gas outflow hole 16 cannot pass through the coating material 20. The degassing processor 50 can be used for a long time. In addition, since the coating material 20 is a material having excellent corrosion resistance, it is possible to effectively prevent the degassing processor 50 from being melted and to have a slight flexibility. It is possible to effectively prevent peeling and cracking of the covering material 20 caused by the difference in thermal expansion between the main body 52 and the covering material 20.

[0051] As an explanation of the operation of the degassing device 50, the case where the bubble generating body 51 of the degassing device 50 is arranged in the accommodation space 7 Oa of the container 70 such as a holding furnace ladle is described as an example. For example, the degassing device 50 can be attached to a tank that transfers the molten metal discharged from the melting furnace to a holding furnace or ladle, so that hydrogen dissolved in the molten metal can be removed. Specifically, for example, as shown in the cross-sectional view of FIG. 11 and the plan view of FIG. 12 in which the force in the direction indicated by the arrow C in FIG. 11 is also seen, the molten metal is transferred to the transfer space 57 and floats on the surface of the melt. In the trough 56 provided with a partition plate 58 for preventing impurities such as slag from flowing in the transfer direction (the direction indicated by the arrow D in FIG. 11), the molten metal transfer side (downstream side) with respect to the partition plate 58 The bubble generator 51 of the degasser 50 is placed in the transfer space 57 in the While transferring from the melting furnace to a ladle, etc., insoluble gas is supplied to the bubble generating body 51 through the gas introduction pipe 55, and fine bubbles flow out from one side 51a of the bubble generating body 51 into the molten metal being transferred. . 11 and FIG. 12, a configuration in which two gas introduction pipes 55, 55 are attached to the bubble generating body 51 is shown.

[0052] Thereby, hydrogen or the like dissolved in the molten metal can be removed during the transfer of the molten metal, and the temporal efficiency of the degassing treatment of the molten metal can be improved. In order to efficiently remove hydrogen or the like dissolved in the molten metal transferred by the trough 56, it is preferable that the other surface 51b of the bubble generating body 51 is disposed so as to be in contact with the bottom surface 57a of the transfer space 57. .

[0053] Although one embodiment of the degassing processor 50 according to the present invention has been described above, the specific mode of the present invention is not limited to the above embodiment. In the present embodiment, as shown in FIG. 9, the bubble generating body 51 is formed in a flat plate shape. For example, as shown in FIG. 13, the bubble generating body 51 is formed in a container shape, and the bubble generating body 51 is formed. You may comprise 51 so that the accommodating part 60 which accommodates a molten metal may be provided. In the case of adopting such a configuration, the gas outflow hole 16 is formed in the processor main body 52 so as to flow out to the accommodating portion 60 through the insoluble gas force covering material 20 guided to the internal space 53 of the processor main body 52. . In the degasser 50 shown in FIG. 13, the gas outflow hole 16 is formed in the processor body 52 so that insoluble gas bubbles flow out from the bottom 60 a of the container 60 into the container 60. With such a configuration, it is possible to obtain a degassing processor 50 having a function of accommodating molten metal. A gas outflow hole 16 is formed in a part of the processor main body 52 constituting the side wall 60b of the housing 60 so that the insoluble gas bubbles also flow into the housing 60 from the side wall 60b of the housing 60. May be.

Further, for example, as shown in FIG. 15 which is a cross-sectional view of FIG. 14 and a plan view seen from the direction of arrow E in FIG. 14, the bubble generator 51 is formed in a bowl shape, Alternatively, a transfer unit 61 for transferring the molten metal may be provided. When such a configuration is adopted, a gas outflow hole 16 is formed in the processor main body 52 so that the insoluble gas guided to the internal space 53 of the processor main body 52 flows out to the transfer section 61 through the coating material 20. To do. As shown in FIG. 14, the degassing processor 50 forms a bubble generating body 51 in a U-shaped cross-sectional view to form a transfer unit 61, and insoluble gas bubbles are transferred from the bottom 6 la of the transfer unit 61. Gas flow to flow into part 61 An outlet 16 is formed in the processor body 52. With such a configuration, it is possible to obtain a degassing processor 50 capable of performing degassing while transferring molten metal from a melting furnace or the like to a ladle or the like. A gas outflow hole 16 is formed in a part of the processor body 52 constituting the side wall 61b of the transfer unit 61 so that insoluble gas bubbles also flow into the transfer unit 61 from the side wall 61b of the transfer unit 61. May be.

[0055] Further, in the degassing processor 50 shown in Fig. 14, the bubble generating body 51 is formed in a U-shape in cross section to constitute the transfer unit 61. For example, as shown in Fig. 16, It is also possible to form the bubble generating body 51 so as to have a U-shape in cross section and to configure the transfer section 61.

In the present embodiment, as shown in FIGS. 8 and 9, the force for forming a plurality of gas outflow holes 16 over substantially the entire area of the one surface 52a of the processor main body 52 is as described above. The configuration is not particularly limited, and for example, a configuration in which a plurality of gas outflow holes 16 are formed in the central portion of the one surface 52a of the processor main body 52 may be employed.

Further, in the present embodiment, as shown in FIG. 9, the bubble generating body 51 is formed in a rectangular flat plate shape in plan view. However, the present invention is not particularly limited to this shape. It can be formed in various shapes such as a flat plate shape having a circular view.

[0058] Similarly to the modification of the lance pipe 1 shown in Fig. 5, the porous plug 40, which is also a porous refractory material, is attached to the gas outflow hole 16 formed in the processor body 52, and the porous plug 40 is porous. A configuration in which the stopper 40 is covered with the covering material 20 can also be adopted. The effect of adopting such a configuration is the same as the effect described in the modification of Lance Neuve shown in FIG.

[0059] Further, at least a part of the processor main body 52 may be formed of a wire mesh member. As the wire mesh member, the member described in the above-described modification of the lance pipe can be employed. In the case where the processor main body 52 is constituted by a wire mesh member, the mesh portion of the wire mesh member corresponds to the gas outflow hole 16, so that it is not necessary to separately form the gas outflow hole 16 and the degassing processor 50 is low in cost. Can be manufactured. In addition, since the processor main body 52 made of a wire mesh member has elasticity, it effectively prevents peeling and cracking of the coating material 20 caused by a difference in thermal expansion between the processor main body 52 and the coating material 20. can do.

Claims

The scope of the claims

[1] A lance pipe for performing degassing treatment by blowing an insoluble gas into a molten metal, comprising a metal pipe body and a covering material made of a porous refractory material covering the pipe body. A lance pipe in which a gas outflow hole covered with the covering material is formed in a side wall of the pipe body.

[2] The lance pipe according to claim 1, wherein the tube main body has a bent portion, and the gas outflow hole is formed on a distal end side of the bent portion of the tube main body. .

[3] The covering material is formed by impregnating a glassy fiber base material sheet with a glassy coating agent and covering the entire surface of the base material sheet with a glassy coating material coating film. The lance nove according to claim 1 or 2.

[4] The gas outflow hole is provided with a porous stopper made of a porous refractory material, and the porous stopper is covered with the covering material. The lancepipe described in.

[5] The lance pipe according to any one of claims 1 to 4, wherein at least a part of the pipe body is formed by forming a wire mesh member into a cylindrical shape.

[6] A degassing treatment device for performing degassing treatment by blowing an insoluble gas into molten metal, and a metallic treatment device body having an internal space, and a porous refractory coating covering the treatment device body A bubble generator having a coating material made of a material, wherein the bubble generator is provided with a gas introduction portion for introducing an insoluble gas into the internal space, and the processor main body includes the coating material. A degassing device in which a gas outflow hole covered with a material is formed.

[7] The bubble generating body according to claim 6, wherein the bubble generating body is formed in a flat plate shape, and the gas outflow hole is formed so that at least one surface force insoluble gas of the bubble generating body flows out. Degasser.

[8] The bubble generating body includes a housing portion in which the molten metal is accommodated, and the gas outflow hole is formed so that insoluble gas flows out into the housing portion! The degassing device according to claim 6.

[9] The bubble generation body according to claim 6, wherein the bubble generator includes a transfer portion to which a molten metal is transferred, and the gas outflow hole is formed so that an insoluble gas flows out to the transfer portion. Prolapse Gas processor.

[10] The covering material is formed by impregnating a glassy fiber base material sheet with a glassy coating agent and covering the entire surface of the base material sheet with a glassy coating material coating film. The degassing device according to any one of claims 6 to 9.

[11] The gas outflow hole is provided with a porous stopper made of a porous refractory material, and the porous stopper is covered with the covering material. The degasser described.

[12] The degasser according to any one of claims 6 to 11, wherein at least a part of the processor main body is formed of a wire mesh member.

[13] A container with a degassing device comprising the degassing device according to claim 6 and a housing space in which the molten metal is housed, wherein the bubble generator is disposed in the housing space. A container with a degasser.

[14] A scissor with a degassing device comprising the degassing device according to claim 6 and a transfer space to which the molten metal is transferred, wherein the bubble generator is disposed in the transfer space.樋 with degasser.