CN111534664A - Ladle and ventilating device for bottom blowing of ladle - Google Patents
Ladle and ventilating device for bottom blowing of ladle Download PDFInfo
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- CN111534664A CN111534664A CN202010525585.4A CN202010525585A CN111534664A CN 111534664 A CN111534664 A CN 111534664A CN 202010525585 A CN202010525585 A CN 202010525585A CN 111534664 A CN111534664 A CN 111534664A
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- brick
- air
- ventilating
- ladle
- installation channel
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- 238000007664 blowing Methods 0.000 title claims abstract description 49
- 239000011449 brick Substances 0.000 claims abstract description 171
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 111
- 239000010959 steel Substances 0.000 claims abstract description 111
- 238000009434 installation Methods 0.000 claims abstract description 80
- 238000009423 ventilation Methods 0.000 claims description 17
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 16
- 238000007670 refining Methods 0.000 abstract description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 28
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 16
- 239000007789 gas Substances 0.000 description 16
- 229910052786 argon Inorganic materials 0.000 description 14
- 239000000654 additive Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to the technical field of molten steel refining, and discloses a steel ladle bottom blowing ventilating device and a steel ladle, wherein the steel ladle bottom blowing ventilating device comprises a seat brick and a ventilating brick, the seat brick is used for being installed at the bottom of the steel ladle, an installation channel is formed in the seat brick, the first end of the installation channel is formed on the upper end surface of the seat brick, the second end of the installation channel is formed on the lower end surface of the seat brick, a section of the installation channel, which is close to the first end, is obliquely arranged relative to the horizontal plane, and the ventilating brick is installed in the installation channel; the installation channels comprise a plurality of installation channels, and the air outlet directions of the corresponding air bricks in at least two installation channels are arranged at preset included angles; according to the invention, through optimally designing the mounting channel matched with the air brick in the brick cup, the air brick is effectively prevented from falling off from the brick cup due to too short residual length, and the air bricks blow molten steel in the steel ladle at the same time at preset included angles, so that vortex is formed in the molten steel in the stirring process, the molten steel is fully stirred, and the effect of refining the molten steel is improved.
Description
Technical Field
The invention relates to the technical field of molten steel refining, in particular to a ventilating device for ladle bottom blowing and a ladle.
Background
In the process of refining molten steel, after the molten steel enters a steel ladle, inert gas is blown into the molten steel, so that the aims of homogenizing the temperature and the chemical composition of the molten steel, promoting the floating of inclusions or controlling the morphology of the inclusions are fulfilled. The ladle bottom argon blowing process has the characteristics of high efficiency, low cost and easy operation, so that the process is widely applied to the molten steel refining process.
The air brick is used as a key functional material in the ladle bottom argon blowing process and plays an important role in the molten steel refining process. For the argon blowing process at the bottom of the steel ladle, molten steel can be stirred by blowing air into the steel ladle through the air brick, additives such as alloy, deoxidizing agent, desulfurizing agent and the like added into the molten steel are rapidly dispersed, the additives are promoted to be melted, and gas or nonmetal inclusions in the molten steel are promoted to be discharged, so that the argon blowing process has the effects of homogenizing the temperature and components of the molten steel and cleaning the molten steel, the quality of steelmaking is improved, and the aim of refining the molten steel is fulfilled. The ladle bottom argon blowing is mainly related to the argon flow, argon blowing pressure, argon blowing time and the mounting structure of air brick, when the flow and the pressure of argon are too big, will produce the molten steel splash at the top of ladle, be unfavorable for the inclusion, especially the getting rid of small-size inclusion to flow and the pressure of argon blowing should be controlled well, and when argon blowing time is too long, can cause the temperature drop of molten steel too much, influence the quality of steeling greatly.
Currently, when blowing a ladle through the air brick, it is common to install the air brick in the brick cup in a vertical manner, and then install the brick cup in the bottom of the ladle. However, the vertical installation of the air brick causes the contact area between the air brick and the brick cup to be too small due to too short residual length of the air brick, and when the pressure borne by the air brick is smaller than the static pressure of molten steel, the molten steel presses the air brick to fall off, thereby causing a breakout accident.
Meanwhile, because the air brick is vertically installed, the gas passing through the air brick is blown into the molten steel in a direction perpendicular to the bottom of the ladle, so that the molten steel at the edge of the ladle cannot be fully stirred, and the stirring effect of the molten steel is affected. In order to solve the problem that molten steel at the edge position of a steel ladle cannot be stirred, the currently adopted method is to install a brick cup corresponding to the edge position of the steel ladle at the bottom of the steel ladle and install a gas permeable brick in the brick cup, but a plurality of brick cups are often installed along the edge of the steel ladle to achieve the effect of fully stirring the molten steel, and the installation arrangement of the plurality of brick cups seriously affects the overall mechanical strength of the steel ladle and is not beneficial to ensuring the safety of molten steel refining.
Disclosure of Invention
The embodiment of the invention provides a ventilating device for ladle bottom blowing, which is used for solving the problems that when the existing ventilating brick is used for ladle bottom blowing argon, the ventilating brick is easy to fall off and molten steel cannot be fully stirred.
The embodiment of the invention also provides a steel ladle based on the ventilating device for blowing air from the steel ladle bottom.
In order to solve the technical problem, an aspect of the embodiment of the present invention provides a ladle bottom-blowing air-permeable device, including a brick cup and an air-permeable brick, where the brick cup is used to be installed at the bottom of a ladle, an installation channel is formed in the brick cup, a first end of the installation channel is formed on an upper end surface of the brick cup, a second end of the installation channel is formed on a lower end surface of the brick cup, a section of the installation channel close to the first end is arranged obliquely with respect to a horizontal plane, and the air-permeable brick is installed in the installation channel; the installation channel includes a plurality ofly, at least two the direction of giving vent to anger of corresponding air brick arranges with predetermineeing the contained angle in the installation channel.
Wherein, the arrangement form of the installation channels comprises any one of a straight-through shape, a broken line shape and a curve shape.
Wherein a section of the installation channel close to the first end is inclined at an angle of 45-85 degrees relative to a horizontal plane, and the preset included angle is 10-90 degrees.
And a fireproof bonding layer is arranged between the inner side wall of the mounting channel and the outer side wall of the air brick.
The installation channel is straight, the caliber of the first end is smaller than that of the second end, and the air brick is matched with the installation channel in shape.
The air brick comprises an air brick core and a tail pipe; the ventilating structure is arranged in the ventilating brick core along the length direction, one end of the ventilating structure is formed at one end of the ventilating brick core, the other end of the ventilating structure is positioned in the ventilating brick core or formed at the other end of the ventilating brick core, and the other end of the ventilating structure is communicated with one end of the tail pipe.
The air brick further comprises a steel sleeve, the outer side wall of the air brick core and the other end of the air brick core are wrapped by the steel sleeve, and the tail pipe is mounted on the steel sleeve corresponding to the other end of the air brick core.
The ventilating structure comprises an air cavity and a ventilating slot channel, one end of the ventilating slot channel is formed at one end of the air brick core, and the other end of the ventilating slot channel is communicated with one end of the tail pipe to form the air cavity.
Wherein, the ventilation seam ways comprise a plurality of ventilation seam ways which are evenly distributed along the same rotation direction in a circumference way.
Wherein the cross section of the air channel is any one of a straight line shape, a curve shape and a broken line shape.
The embodiment of the invention also provides a steel ladle, which comprises a steel ladle body and the ventilating device which is arranged at the bottom of the steel ladle body and used for blowing the air to the bottom of the steel ladle.
The ventilating device for blowing air to the bottom of the steel ladle is arranged in the center of the bottom of the steel ladle body.
One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:
according to the air-permeable device for blowing air to the bottom of the steel ladle and the steel ladle provided by the embodiment of the invention, the installation channel matched with the air-permeable brick in the brick cup is optimally designed, the section, close to the first end, of the installation channel is obliquely arranged relative to the horizontal plane, and correspondingly, the air-blowing airflow formed in the steel ladle through the air-permeable brick is also obliquely arranged relative to the horizontal plane, so that on one hand, the air-permeable brick can be effectively prevented from falling off from the brick cup due to too short residual length based on the lateral support provided by the brick cup on the air-permeable brick, not only can the molten steel at the edge position of the steel ladle be blown, a better molten steel stirring effect can be achieved, but also the speed of the molten steel permeating into the air-permeable brick can be slowed down; on the other hand, the air outlet directions of the air bricks in the brick cup are arranged at preset included angles, so that molten steel can be blown at the bottom of the steel ladle along different directions simultaneously, the molten steel forms vortex in the stirring process, the molten steel is fully stirred, the same stirring effect can be achieved in a short time under the condition of using lower blowing flow and pressure, and the effect of refining the molten steel is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a ventilating device for blowing air into a ladle bottom according to an embodiment of the present invention;
FIG. 2 is a schematic view of a half-section structure of the air brick according to the embodiment of the invention;
FIG. 3 is a schematic top view of a first arrangement of air passages in the air brick according to an embodiment of the present invention;
FIG. 4 is a schematic top view of a second arrangement of air passages in the air brick according to the embodiment of the present invention;
FIG. 5 is a schematic top view of a third arrangement of air passages in the air brick according to the embodiment of the present invention;
fig. 6 is a schematic half-section structure view of a ladle according to an embodiment of the present invention.
In the figure, 1, a brick cup; 2. air permeable bricks; 21. a gas permeable brick core; 22. a tail pipe; 23. a venting structure; 231. an air cavity; 232. a ventilation seam; 24. steel jacket; 3. installing a channel; 4. a ladle body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the embodiment provides a ladle bottom-blown gas permeation device, which includes a brick cup 1 and a gas permeation brick 2, wherein the brick cup 1 is used for being installed at the bottom of a ladle, an installation channel 3 is formed in the brick cup 1, a first end of the installation channel 3 is formed on an upper end surface of the brick cup 1, a second end of the installation channel 3 is formed on a lower end surface of the brick cup 1, a section of the installation channel 3, which is close to the first end, is obliquely arranged relative to a horizontal plane, and the gas permeation brick 2 is installed in the installation channel 3; the installation channels 3 comprise a plurality of installation channels, and the air outlet directions of the corresponding air bricks 2 in at least two installation channels 3 are arranged at preset included angles.
Specifically, in the air breather for blowing air to the bottom of the ladle shown in the embodiment, the installation channel 3 matched with the air brick 2 in the brick cup 1 is optimally designed, a section of the installation channel 3 close to the first end of the installation channel is obliquely arranged relative to the horizontal plane, and correspondingly, the air flow formed by the air brick 2 into the ladle is also obliquely arranged relative to the horizontal plane, so that on one hand, based on the lateral support provided by the brick cup 1 on the air brick 2, the air brick 2 can be effectively prevented from falling off from the brick cup 1 due to too short residual length, and based on the oblique installation structure of the air brick 2, the air can be blown to the molten steel at the inner edge position of the ladle, so that a better molten steel stirring effect is achieved, the speed of the molten steel permeating into the air brick 2 can be slowed down, and the service life of the air brick 2 is prolonged; on the other hand, the air outlet directions of the air bricks 2 in the brick cup 1 are arranged at preset included angles, so that molten steel can be blown at the bottom of the steel ladle along different directions simultaneously, eddy current is formed in the stirring process of the molten steel, the molten steel is fully stirred, the same stirring effect can be achieved in a short time under the condition of using lower blowing flow and pressure, and the effect of refining the molten steel is improved.
It should be noted here that in the existing ladle bottom argon blowing process, for the ladle structure, due to the limitation of the ladle bottom thickness, it is currently common to mount the air brick in the brick cup in a vertical manner and blow the molten steel in the ladle in a vertically upward manner to achieve stirring of the molten steel in the ladle. However, the prior art does not recognize that the molten steel at the edge of the ladle is blown by the air brick, so that the prior blowing manner cannot achieve the effect of fully stirring the molten steel in the ladle, and even if the prior art recognizes the problem, the intuitive scheme is that a plurality of seat bricks are installed at the edge of the bottom of the ladle when the problem of fully stirring the molten steel at the edge of the ladle is solved, which seriously affects the overall mechanical strength of the ladle. Therefore, the embodiment is designed by aiming at the recognition error area or the technical bias of the prior art personnel, based on the improvement of the installation channel 3 and the corresponding air brick 2, on the premise of not influencing the integral mechanical strength of the ladle, the air brick 2 is designed to obliquely blow towards the ladle, the air outlet directions of the air bricks 2 are ensured to be arranged at preset included angles, the blowing air flow passing through the air brick 2 can reach the edge part of the ladle directly, and the molten steel forms vortex in the stirring process, so that the molten steel at the edge part of the ladle is ensured to be fully stirred.
Wherein the brick cup 1 shown in this embodiment comprises a square or rectangular parallelepiped shape such that the upper end face and the lower end face of the brick cup 1 are parallel, and wherein a section of the installation channel 3 near the first end thereof is inclined at an angle of 45 ° to 85 ° with respect to the horizontal plane in the brick cup 1, and wherein the angle of inclination of the air flow blown out of the air brick 2 with respect to the horizontal plane is correspondingly 45 ° to 85 ° due to the air brick 2 being fittingly installed in the installation channel 3. When the installation channels are provided in multiple numbers, the air outlet directions of the air bricks 2 corresponding to any two installation channels can be arranged at a preset included angle, or some installation channels can be arranged in parallel, and the other one or more installation channels and the installation channels arranged in parallel are arranged at a preset included angle, which is not limited specifically.
In one embodiment, as shown in fig. 1, two installation channels 3 can be provided, and the size of the preset included angle formed by the air outlet directions of the corresponding air bricks 2 in the two installation channels 3 is 10-90 degrees, so that the structure is simple, and the molten steel can form vortex in the stirring process based on the air blowing flows of the two air bricks 2, thereby ensuring the sufficient stirring of the molten steel at the edge position of the ladle.
In one preferred embodiment, the arrangement of the installation channel 3 may be any one of a straight-through shape, a folded line shape and a curved shape, and the arrangement of the air bricks 2 installed in the installation channel 3 may be any one of a straight-through shape, a folded line shape and a curved shape accordingly.
In one embodiment, the installation channel 3 may be arranged in a straight-through manner, and the installation channel 3 may be designed as a straight-through channel arranged at an angle of 45 ° to 85 ° as shown in the above-mentioned embodiment.
In another embodiment, the arrangement form of the installation channel 3 may be a broken line shape, the installation channel 3 may be designed as a channel structure formed by sequentially connecting at least two straight line segments according to a preset angle, but it should be ensured that one straight line segment of the installation channel 3 close to the first end thereof is obliquely arranged relative to the horizontal plane, specifically, the installation channel 3 may be designed as two connected straight line segments, one straight line segment is close to the first end of the installation channel 3 and is obliquely arranged relative to the horizontal plane, and the other straight line segment may be obliquely arranged or vertically arranged, which is not limited specifically herein.
In another embodiment, the installation channel 3 may be arranged in a curved shape, and it is understood that when a section of the installation channel 3 near the first end is arranged obliquely with respect to the horizontal plane, other parts of the installation channel 3 may be designed to be a single arc-shaped channel structure, or a curved channel structure formed by sequentially connecting a plurality of arc-shaped segments.
Based on the improvement of the above embodiment, the embodiment may further include a refractory adhesive layer between the inner sidewall of the installation channel 3 and the outer sidewall of the air brick 2, the thickness of the refractory adhesive layer may be 10mm, and refractory mortar known in the art may be specifically used to achieve adhesion between the installation channel 3 and the air brick 2, and form the refractory adhesive layer shown in the embodiment.
As shown in fig. 1, based on the further improvement of the above embodiment, the present embodiment may make the cross section of the installation channel 3 be circular or square, the caliber of the first end of the installation channel 3 is smaller than that of the second end thereof, and the air brick 2 is adapted to the installation channel 3 in shape. Therefore, based on the structural design of the installation channel 3, the air brick 2 is in a circular truncated cone shape, one end of the air brick 2 corresponding to the upper end face of the brick cup 1 is a small end, and one end of the air brick 2 corresponding to the lower end face of the brick cup 1 is a large end, so that when the ladle is blown (argon gas), gas is introduced from the large end of the air brick 2, is output from the small end of the air brick 2 and is blown into molten steel. Therefore, for the design structure of the installation channel 3, the installation channel 3 and the air brick 2 are convenient to match and install, the installation and the positioning of the air brick 2 are realized, and the abrasion of the refractory material between the air brick 2 and the installation channel 3 caused by the overlarge flow or pressure of the blowing air is prevented, and even the air brick 2 is pressed into a ladle to cause the occurrence of steel leakage or breakout accidents.
As shown in fig. 2, in one of the preferred embodiments, the air brick 2 includes an air brick core 21 and a tail pipe 22; the ventilating structure 23 arranged along the length direction of the ventilating brick core 21 is arranged in the ventilating brick core 21, one end of the ventilating structure 23 is formed at one end of the ventilating brick core 21, the other end of the ventilating structure 23 is positioned in the ventilating brick core 21 or formed at the other end of the ventilating brick core 21, and the other end of the ventilating structure 23 is communicated with one end of the tail pipe 22.
Specifically, the ventilation structure 23 includes an air chamber 231 and a ventilation slot 232, one end of the ventilation slot 232 is formed at one end of the gas permeable brick core 21, the other end of the ventilation slot 232 is communicated with the air chamber 231, when the air chamber 231 is arranged in the gas permeable brick core 21, one end of the tail pipe 22 can be communicated with the air chamber 231, and thus, the air chamber 231 distributes air for the ventilation slot 232.
When the air cavity 231 is formed at the other end of the air brick core 21, the outer side wall of the air brick core 21 and the other end of the air brick core 21 are wrapped by the steel sleeve 24, so that the other end of the air brick core 21 can be provided with a sunken groove communicated with the other end of the air passage way 232, the sunken groove and the steel sleeve 24 enclose the air cavity 231 shown in the embodiment, at this time, one end of the tail pipe 22 is installed on the steel sleeve 24 corresponding to the other end of the air brick core 21 and extends into the steel sleeve 24, so that the air cavity 231 can be ventilated, and air can be distributed to the air passage way 232 through the air cavity 231. When the air brick 2 is installed, the corresponding steel sleeve 24 on the outer side wall of the air brick core 21 is connected with the inner side wall of the installation channel 3 through the fire clay shown in the above embodiment.
Preferably, the ventilation slits 232 in this embodiment include a plurality of slits, and are circumferentially and uniformly distributed along the same rotation direction. Therefore, the air can be distributed to the plurality of air vent slits 232 through the air cavity 231 at the same time, the balance of the flow and the pressure of air blown by each air vent slit 232 is ensured, so that the molten steel is uniformly turned, and the air brick 2 is obliquely arranged in the brick cup 1, so that the molten steel in the ladle is fully stirred.
Further, in the present embodiment, the cross section of the air passage 232 is any one of a straight line shape, a curved line shape, and a broken line shape. It should be noted here that the slit width of the vent slit 232 is relatively narrow, and may be, in particular, 0.05-0.25mm, and the length profile of the vent slit 232 in its cross section is relatively obvious, so that the cross section of the vent slit 232 is defined by the length profiles of a straight line, a curved line and a broken line. Wherein, the length of the ventilation seam passage 232 along the axial direction of the air brick 2 is specifically set according to the volume of the ladle and the ventilation requirement.
Specifically, as shown in fig. 3, in one preferred embodiment, the cross section of the air passage 232 is linear, and the air passage 232 is arranged along the radial direction of the air brick 2, such air passage 232 is a straight passage, which is relatively simple to manufacture and has smooth air passage. Thus, the gas distribution of the gas chamber 231 allows the gas passage slits 232 to smoothly blow gas into the molten steel from the small end of the gas permeable brick 2, thereby ensuring the molten steel stirring efficiency.
As shown in fig. 4, in another preferred embodiment, the cross section of each vent slit channel 232 is linear, but each vent slit channel 232 and the radial direction of the air brick 2 form a preset included angle α, and the size of α can be 20-45 °, so that while the smoothness of air blowing is ensured, air blowing from the small head end of the air brick 2 to molten steel can form a vortex, the molten steel can be uniformly turned over, and a good stirring effect is ensured.
As shown in fig. 5, in a further preferred embodiment, the cross section of the air passage 232 is curved, and the cross section of the air passage 232 may be circular arc, and since the air passages 232 are arranged along the same rotation direction (counterclockwise), air blowing from the small end of the air brick 2 to the molten steel may form a significant vortex, which greatly improves the effect of uniformly stirring the molten steel, and may ensure the stirring efficiency of the molten steel, and this design structure may also prevent the molten steel from flowing back into the air passage 232 at high temperature, which may cause steel leakage or breakout accident.
As shown in fig. 6, another aspect of the embodiment of the present invention further provides a ladle, which includes a ladle body 4, and further includes a ventilation device for blowing air into the bottom of the ladle, which is installed at the bottom of the ladle body 4.
Specifically, the ventilating device capable of blowing air from the bottom of the ladle is arranged at the center of the bottom of the ladle body 4, and the air outlet directions of the plurality of ventilating bricks 2 in the brick cup 1 are arranged at preset included angles, so that molten steel can be blown simultaneously in different directions at the center of the bottom of the ladle, vortexes are formed in the stirring process of the molten steel, the molten steel is fully stirred, the same stirring effect can be achieved in a short time under the condition of using lower blowing flow and pressure, and the effect of refining the molten steel is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A steel ladle bottom blowing ventilating device comprises a seat brick and a ventilating brick, wherein the seat brick is installed at the bottom of a steel ladle, and the steel ladle bottom blowing ventilating device is characterized in that an installation channel is formed in the seat brick, the first end of the installation channel is formed on the upper end face of the seat brick, the second end of the installation channel is formed on the lower end face of the seat brick, one section of the installation channel, which is close to the first end, is obliquely arranged relative to the horizontal plane, and the ventilating brick is installed in the installation channel; the installation channel includes a plurality ofly, at least two the direction of giving vent to anger of corresponding air brick arranges with predetermineeing the contained angle in the installation channel.
2. The ladle bottom-blowing ventilating device as defined in claim 1, wherein the arrangement of the installation passage includes any one of a straight-through shape, a folded line shape, and a curved line shape.
3. The ladle bottom-blowing gas permeable device according to claim 1, wherein a section of the installation channel near the first end is inclined at an angle of 45 ° to 85 ° with respect to a horizontal plane, and the predetermined included angle is 10 ° to 90 °.
4. The ladle bottom blowing air permeable device according to any one of claims 1 to 3, wherein a refractory adhesive layer is provided between the inner side wall of the installation channel and the outer side wall of the air permeable brick.
5. The apparatus as claimed in claim 4, wherein the installation channel is a straight channel, the first end has a smaller diameter than the second end, and the air brick is adapted to the installation channel in shape.
6. The ladle bottom-blowing ventilating device as defined in claim 5, wherein the gas brick includes a gas brick core and a tail pipe; the ventilating structure is arranged in the ventilating brick core along the length direction, one end of the ventilating structure is formed at one end of the ventilating brick core, the other end of the ventilating structure is positioned in the ventilating brick core or formed at the other end of the ventilating brick core, and the other end of the ventilating structure is communicated with one end of the tail pipe.
7. The ladle bottom-blowing ventilating device according to claim 6, wherein the ventilating brick further comprises a steel sleeve, the steel sleeve wraps the outer side wall of the ventilating brick core and the other end of the ventilating brick core, and the tail pipe is mounted on the steel sleeve corresponding to the other end of the ventilating brick core.
8. The ladle bottom-blowing ventilation device of claim 6, wherein the ventilation structure comprises an air cavity and a ventilation slot channel, one end of the ventilation slot channel is formed at one end of the ventilating brick core, and the other end of the ventilation slot channel is communicated with one end of the tail pipe to form the air cavity;
the air-through slit passage comprises a plurality of air-through slit passages which are uniformly distributed along the same rotation direction in a circumferential manner, and the cross section of each air-through slit passage is any one of a straight line shape, a curve shape and a broken line shape.
9. A ladle comprising a ladle body and further comprising a gas permeable means for blowing gas into the bottom of the ladle as claimed in any one of claims 1 to 8 mounted at the bottom of the ladle body.
10. The ladle according to claim 9, wherein the ladle bottom blowing gas permeable means is installed at the center of the bottom of the ladle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010525585.4A CN111534664A (en) | 2020-06-10 | 2020-06-10 | Ladle and ventilating device for bottom blowing of ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010525585.4A CN111534664A (en) | 2020-06-10 | 2020-06-10 | Ladle and ventilating device for bottom blowing of ladle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111534664A true CN111534664A (en) | 2020-08-14 |
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| CN202010525585.4A Pending CN111534664A (en) | 2020-06-10 | 2020-06-10 | Ladle and ventilating device for bottom blowing of ladle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112501378A (en) * | 2020-11-23 | 2021-03-16 | 东北大学 | Top-bottom combined blown converter and steelmaking method |
| CN114309565A (en) * | 2022-01-08 | 2022-04-12 | 濮阳濮耐高温材料（集团）股份有限公司 | Fluid stirring and purifying element with arc air passage |
| CN114367653A (en) * | 2022-01-07 | 2022-04-19 | 濮阳濮耐高温材料（集团）股份有限公司 | Fluid stirring purification element with scroll structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112501378A (en) * | 2020-11-23 | 2021-03-16 | 东北大学 | Top-bottom combined blown converter and steelmaking method |
| CN114367653A (en) * | 2022-01-07 | 2022-04-19 | 濮阳濮耐高温材料（集团）股份有限公司 | Fluid stirring purification element with scroll structure |
| CN114367653B (en) * | 2022-01-07 | 2024-03-29 | 濮阳濮耐高温材料（集团）股份有限公司 | Fluid stirring purifying element with scroll structure |
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