CN214977732U - Slag removing device for molten iron pretreatment - Google Patents

Slag removing device for molten iron pretreatment Download PDF

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Publication number
CN214977732U
CN214977732U CN202120212190.9U CN202120212190U CN214977732U CN 214977732 U CN214977732 U CN 214977732U CN 202120212190 U CN202120212190 U CN 202120212190U CN 214977732 U CN214977732 U CN 214977732U
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China
Prior art keywords
slag
gas
plate
trachea
slag removing
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CN202120212190.9U
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Chinese (zh)
Inventor
陈俊东
杨丽
孙雅平
关晓光
张明
翟福阳
段嘉豪
孙超
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Tangshan Vocational And Technical College
Tangshan Iron and Steel Group Co Ltd
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Tangshan Vocational And Technical College
Tangshan Iron and Steel Group Co Ltd
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Abstract

The utility model relates to a slag removing device for molten iron pretreatment, which belongs to the metallurgical equipment device and the technical field. Comprises a slag-raking arm (1), a slag-raking head plate (9), a slag-raking plate (12) and an air inlet pipe orifice
Figure 100004_DEST_PATH_IMAGE002
(2) Trachea and trachea
Figure 759933DEST_PATH_IMAGE002
(6) Connecting pipePiece
Figure 605529DEST_PATH_IMAGE002
(7) An air inlet (28), an internal air passage (29), an air outlet (30), a pipe clip
Figure 553893DEST_PATH_IMAGE002
(5) The lower part of the slag raking arm (1) is provided with a protective hanging bracket (18), the lower part of the side surface is provided with a nozzle (22), and the nozzle (22) faces the slag raking plate (12). This device simple structure, easily operation has realized the quick, clean operation of taking off the sediment of taking off of iron slag after the hot metal preliminary treatment, through the cooling processing of nitrogen gas, has improved the life-span of taking off the sediment board.

Description

Slag removing device for molten iron pretreatment
Technical Field
The utility model relates to a slag removing device for molten iron pretreatment, which belongs to the metallurgical equipment device and the technical field.
Background
With the progress of science and technology and the development of society, the quality requirements of people on steel products are higher and higher. Particularly, the yield of low-sulfur and ultra-low-sulfur high-quality steel is higher and higher. At present, various large steel mills generally adopt a molten iron pretreatment technology for desulfurization, and the slag skimming treatment directly relates to the quality of the treated molten iron in the molten iron pretreatment process. Harmful elements such as sulfur in steel and the like react with a desulfurizing agent and then float up to slag to form desulfurized slag, if the desulfurized slag containing sulfur cannot be effectively removed from a ladle, the iron slag containing sulfur enters the next procedure, and the sulfur in the slag can also return to molten steel.
The apparatus used for slag-raking treatment in the molten iron pretreatment is a slag-raking machine. The slag removing machine is connected with a slag removing head plate through a slag removing arm, and the slag removing head plate drives the slag removing plate to remove slag. Most of the existing slag raking plates are made of iron materials, and the appearance of the slag raking plates is of a shovel-shaped structure. Because the slag skimming plate is contacted with the high-temperature molten iron and the iron slag for a long time in the slag skimming process, the contact part of the slag skimming plate and the iron slag and the molten iron is quickly in a high-temperature red hot state. The strength of the slag removing plate in a high-temperature red hot state is greatly reduced compared with that at normal temperature. The slag removing plates are quickly eroded by the iron slag in the slag removing process, generally, the slag removing plates need to be replaced after 2-3 shifts of slag removing operation, the service life of the slag removing plates is short, the cost is increased, and the workload is increased. And the slag removing plate can not be replaced at a high temperature, and needs to be replaced after the temperature is reduced, so that the production rhythm of a steel mill is influenced. In addition, the general slag skimming plate is of a rectangular plane structure, the ladle is of a cylindrical structure, and the size of the slag skimming plate is smaller than the diameter of the ladle. Therefore, in the slag removing process, part of slag can leak from the two sides of the slag removing plate, and the iron slag needs to be removed repeatedly for multiple times, so that the slag removing efficiency is influenced. Therefore, research and development are needed to develop a molten iron pretreatment slag removing device, so that the service life of a slag removing plate is prolonged, and efficient slag removing operation is realized.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a slag device is taken off in hot metal pretreatment, improves and takes off the slag plate life-span, realizes the high-efficient operation of taking off the slag.
The technical scheme of the utility model is that:
the molten iron pretreatment slag removing device comprises a slag removing arm, a slag removing head plate, a slag removing plate and an air inlet pipe orifice
Figure DEST_PATH_IMAGE002
Trachea and trachea
Figure 756634DEST_PATH_IMAGE002
Connecting pipe fitting
Figure 408195DEST_PATH_IMAGE002
Air inlet, internal air passage, air outlet and pipe clamp
Figure 624151DEST_PATH_IMAGE002
The gas inlet, the internal gas circuit and the gas outlet are arranged on the slag skimming plate to form a communicated gas channel, the internal gas circuit is an annular gas circuit pipeline, the gas inlet is arranged on the upper end surface of the slag skimming plate and communicated with the internal gas circuit, the gas outlet is arranged on the lower end surface of the slag skimming plate and communicated with the internal gas circuit, and the gas inlet pipe orifice is
Figure 957043DEST_PATH_IMAGE002
Trachea and trachea
Figure 115623DEST_PATH_IMAGE002
Is communicated with the air pipe
Figure 46408DEST_PATH_IMAGE002
By connecting pipe fittings
Figure 985545DEST_PATH_IMAGE002
Communicated with the air inlet, the air inlet pipe orifice
Figure 27188DEST_PATH_IMAGE002
Trachea and trachea
Figure 305854DEST_PATH_IMAGE002
Passing pipe clamp
Figure 266594DEST_PATH_IMAGE002
Is fixedly assembled on the slag raking arm.
The lower part of the slag raking arm is provided with a protective hanging bracket which is shaped like a Chinese character 'ji', the protective hanging bracket is provided with a gas spraying tank, the gas spraying tank is a cylindrical tank body, the lower part of the side surface of the gas spraying tank is provided with a nozzle facing the slag raking plate, and the slag raking arm is provided with a gas inlet pipe orifice
Figure DEST_PATH_IMAGE004
Trachea and trachea
Figure 568394DEST_PATH_IMAGE004
The two are assembled and communicated with each other, the air pipe
Figure 272782DEST_PATH_IMAGE004
By connecting pipe fittings
Figure 140375DEST_PATH_IMAGE004
Is communicated with the jet tank in a matching way, and the air inlet pipe orifice
Figure 39061DEST_PATH_IMAGE004
Trachea and trachea
Figure 959367DEST_PATH_IMAGE004
Passing pipe clamp
Figure 109857DEST_PATH_IMAGE004
And the assembly is fixed on the slag raking arm.
The air inlet pipe orifice
Figure 127229DEST_PATH_IMAGE002
Is provided with a pressure regulating valve
Figure 39559DEST_PATH_IMAGE002
。
The air inlet pipe orifice
Figure 112688DEST_PATH_IMAGE004
Is provided with a pressure regulating valve
Figure 394765DEST_PATH_IMAGE004
。
The air outlets are small holes with the diameter of 3-6 mm, are arranged in 1-3 rows, are spaced by 50-100 mm and are uniformly distributed on the lower end surface of the slag removing plate.
The diameter of the nozzles is 5-10 mm, the distance between 3-5 rows of nozzles is 50-120 mm, the nozzles are uniformly distributed at the lower part of the side surface of the air injection tank, and the intersection point of the central line of the nozzle at the lowest row of the nozzles and the slag removing plate is 50-60 mm away from the lowest part of the slag removing plate.
And a heat insulation plate is assembled between the bottom of the air injection tank and the protection hanging bracket.
The assembly part of the protective hanging bracket and the slag removing arm is provided with a movable groove, and the protective hanging bracket is assembled and fixed on the slag removing arm through the movable groove by a bolt.
The utility model discloses useful part lies in: this device simple structure, easily operation has realized the quick, clean operation of taking off the sediment of taking off of iron slag after the hot metal preliminary treatment, through the cooling processing of nitrogen gas, has improved the life-span of taking off the sediment board, reduces and changes the number of times, has improved the production rhythm.
Drawings
FIG. 1 is a schematic structural diagram of the device of the present invention;
FIG. 2 is a schematic view of the assembled protective hanger and jet canister of the present invention;
fig. 3 is a schematic view of the device hanger of the present invention;
FIG. 4 is a front view of the gas injection tank of the device of the present invention;
FIG. 5 is a side view of the jet tank of the apparatus of the present invention;
FIG. 6 is a schematic view of the heat insulation plate of the device of the present invention;
FIG. 7 is a front view of the slag raking plate of the device of the utility model;
FIG. 8 is a side view of the slag raking plate of the device of the present invention;
the figures are labeled as follows: slag-raking arm 1 and air inlet pipe orifice
Figure 860119DEST_PATH_IMAGE002
Figure 860119DEST_PATH_IMAGE002
2. Electric stop valve 3, pressure regulating valve
Figure 975974DEST_PATH_IMAGE002
Figure 975974DEST_PATH_IMAGE002
4. Pipe clip
Figure 864296DEST_PATH_IMAGE002
Figure 864296DEST_PATH_IMAGE002
5. Trachea
Figure 183019DEST_PATH_IMAGE002
Figure 183019DEST_PATH_IMAGE002
6. Connecting pipe fitting
Figure 473186DEST_PATH_IMAGE002
Figure 473186DEST_PATH_IMAGE002
7. Gas spray tank 8, slag removing head plate 9 and connecting bolt
Figure 353418DEST_PATH_IMAGE002
Figure 353418DEST_PATH_IMAGE002
10、Connecting bolt
Figure 729035DEST_PATH_IMAGE004
Figure 729035DEST_PATH_IMAGE004
11. Slag removing plate 12 and connecting bolt
Figure DEST_PATH_IMAGE006
Figure DEST_PATH_IMAGE006
13. Foundation bolt
Figure 789133DEST_PATH_IMAGE002
Figure 789133DEST_PATH_IMAGE002
14. Connecting bolt
Figure DEST_PATH_IMAGE008
Figure DEST_PATH_IMAGE008
15. The heat insulation plate 16, angle steel 17, a protective hanging bracket 18, a bolt 19, a movable groove 20 and a connecting hole
Figure 137069DEST_PATH_IMAGE002
Figure 137069DEST_PATH_IMAGE002
21. Nozzle 22, supporting leg 23, foundation hole 24, middle hole 25, side hole 26 and connecting hole
Figure 686736DEST_PATH_IMAGE004
Figure 686736DEST_PATH_IMAGE004
27. Air inlet 28, internal air passage 29, air outlet 30 and air inlet pipe orifice
Figure 549650DEST_PATH_IMAGE004
Figure 549650DEST_PATH_IMAGE004
31. Pressure regulating valve
Figure 711641DEST_PATH_IMAGE004
Figure 711641DEST_PATH_IMAGE004
32. Pipe clip
Figure 976401DEST_PATH_IMAGE004
Figure 976401DEST_PATH_IMAGE004
33. Trachea
Figure 837915DEST_PATH_IMAGE004
34. Connecting pipe fitting
Figure 719283DEST_PATH_IMAGE004
Figure 719283DEST_PATH_IMAGE004
35。
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in the attached drawing, a slag removing device for the pretreatment of molten iron and a ladleComprises a slag-raking arm 1, a slag-raking head plate 9, a slag-raking plate 12 and an air inlet pipe orifice
Figure 793288DEST_PATH_IMAGE002
Figure 793288DEST_PATH_IMAGE002
2. Trachea
Figure 912553DEST_PATH_IMAGE002
Figure 912553DEST_PATH_IMAGE002
6. Connecting pipe fitting
Figure 39909DEST_PATH_IMAGE002
Figure 39909DEST_PATH_IMAGE002
7. Air inlet 28, internal air passage 29, air outlet 30 and pipe clamp
Figure 375950DEST_PATH_IMAGE002
Figure 375950DEST_PATH_IMAGE002
5, air inlet 28, inside gas circuit 29, gas outlet 3) set up on taking off slag plate 12, form intercommunication gas passage, inside gas circuit 29 is the annular gas circuit pipeline, air inlet 28 has one, sets up at taking off slag plate 12 up end, communicates with inside gas circuit 29, gas outlet 30 sets up terminal surface under taking off slag plate 12, communicates with inside gas circuit 29, the mouth of pipe of admitting air is managed, the mouth of pipe of admitting air is linked together with inside gas circuit 29
Figure 879744DEST_PATH_IMAGE002
2. Trachea
Figure 384675DEST_PATH_IMAGE002
Figure 384675DEST_PATH_IMAGE002
6 connected to each other through a gas pipe
Figure 417353DEST_PATH_IMAGE002
Figure 417353DEST_PATH_IMAGE002
6 through connecting pipe fittings
Figure 443952DEST_PATH_IMAGE002
Figure 443952DEST_PATH_IMAGE002
7 communicate with an air inlet 28, said air inlet nozzle
Figure 751437DEST_PATH_IMAGE002
Figure 751437DEST_PATH_IMAGE002
2. Trachea
Figure 845295DEST_PATH_IMAGE002
6 pass through pipe checkpost
Figure 78568DEST_PATH_IMAGE002
Figure 78568DEST_PATH_IMAGE002
5 is fixedly assembled on the slag raking arm 1. The lower part of the slag raking arm 1 is provided with a protective hanging bracket 18, the protective hanging bracket 18 is shaped like a Chinese character 'ji', the protective hanging bracket 18 is provided with a gas spraying tank 8, the gas spraying tank 8 is a cylindrical tank body, the lower part of the side surface of the gas spraying tank is provided with a nozzle 22, the nozzle 22 faces the slag raking plate 12, and the slag raking arm 1 is provided with a gas inlet pipe orifice
Figure 625087DEST_PATH_IMAGE004
Figure 625087DEST_PATH_IMAGE004
31. Trachea
Figure 736262DEST_PATH_IMAGE004
Figure 736262DEST_PATH_IMAGE004
34, the two are assembled and communicated with each other, and an air pipe
Figure 684627DEST_PATH_IMAGE004
Figure 684627DEST_PATH_IMAGE004
34 by connecting the pipe fittings
Figure 229746DEST_PATH_IMAGE004
Figure 229746DEST_PATH_IMAGE004
35 is communicated with the jet tank 8 in an assembling way, and the air inlet pipe orifice
Figure 794720DEST_PATH_IMAGE004
Figure 794720DEST_PATH_IMAGE004
31. Trachea
Figure 349067DEST_PATH_IMAGE004
Figure 349067DEST_PATH_IMAGE004
34 passing through the pipe clip
Figure 151938DEST_PATH_IMAGE004
Figure 151938DEST_PATH_IMAGE004
33 are assembled and fixed on the slag raking arm 1. The air inlet pipe orifice
Figure 494058DEST_PATH_IMAGE002
Figure 494058DEST_PATH_IMAGE002
2 is provided with a pressure regulating valve
Figure 15169DEST_PATH_IMAGE002
Figure 15169DEST_PATH_IMAGE002
4. The air inlet pipe orifice
Figure 701103DEST_PATH_IMAGE004
Figure 701103DEST_PATH_IMAGE004
31 is provided with a pressure regulating valve
Figure 889639DEST_PATH_IMAGE004
Figure 889639DEST_PATH_IMAGE004
32. The above-mentionedThe air outlets 30 are small holes with the diameter of 4 mm and are arranged in 1 row, the distance between the air outlets 30 is 70 mm, and the air outlets are evenly distributed on the lower end surface of the slag removing plate 12. The diameter of the nozzles 22 is 8 mm, the distance between the nozzles 22 in 3 rows is 60 mm, the nozzles are uniformly distributed at the lower part of the side surface of the air injection tank 8, and the intersection point of the central line of the nozzle at the lowest row of the nozzles 22 and the slag removing plate 12 is 52 mm away from the lowest part of the slag removing plate 12. A heat insulation plate 16 is arranged between the bottom of the gas spraying tank 8 and a protective hanging bracket 18. The assembly part of the protective hanger 18 and the slag removing arm 1 is provided with a movable groove 20, the protective hanger 18 is assembled and fixed on the slag removing arm 1 through the movable groove 20 by a bolt 19, and the protective hanger 18 can adjust the position and the orientation of the nozzle 22 by moving the position of the movable groove 20.
In the implementation, 4 bolts 19 are taken, and 2 protective hanging brackets 18 are fixed on two sides of the slag removing arm 1. For example, 2 connecting bolts are used for 1 angle steel 17 and 1 protective hanging bracket 18
Figure 137080DEST_PATH_IMAGE008
15 are fastened together. Similarly, another 1 angle steel 17 and another 1 protective hanging bracket 18 are connected by 2 connecting bolts
Figure 145488DEST_PATH_IMAGE008
Figure 145488DEST_PATH_IMAGE008
15 are fastened together. Two sets of angle steels 17 and protective hangers 18 are symmetrically arranged at two sides of the slag raking arm 1. Taking a heat insulation plate 16 and a cross arm between two angle steels 17, and taking 4 connecting bolts
Figure 635113DEST_PATH_IMAGE006
Figure 635113DEST_PATH_IMAGE006
13 are inserted through the median hole 25 of the heat shield 16 and the corresponding hole of the angle steel 17 to fasten the heat shield 16 and the angle steel 17 together. Pushing the air injection tank 8 on the heat insulation plate 16 to align the anchor hole 24 of the air injection tank 8 with the side position hole 26 of the heat insulation plate 16, and threading 4 anchor bolts
Figure 412576DEST_PATH_IMAGE002
Figure 412576DEST_PATH_IMAGE002
14 and fastening. Get 4 connecting bolts
Figure 830919DEST_PATH_IMAGE002
Figure 830919DEST_PATH_IMAGE002
10 connect the slag raking head plate 9 and the slag raking arm 1 together. 4 connecting bolts
Figure 61043DEST_PATH_IMAGE004
Figure 61043DEST_PATH_IMAGE004
11 passes through a connecting hole of a slag raking plate 12
Figure 643375DEST_PATH_IMAGE004
27 and corresponding holes of the slag raking head plate 9, and tightly connecting the slag raking plate 12 and the slag raking head plate 9 together. And 4 bolts 19 are loosened, and the protective hanging bracket 18 is moved back and forth along the movement direction of the slag raking arm 1. The intersection point of the central line of the nozzle at the lowest row of the nozzles 22 and the slag-removing plate 12 is 55mm away from the lowest part of the slag-removing plate 12. After the adjustment, 4 bolts 19 are fastened.
The slag removing method for the molten iron pretreatment by adopting the device comprises the following slag removing steps:
Figure DEST_PATH_IMAGE010
the air inlet pipe mouth
Figure 213028DEST_PATH_IMAGE002
Figure 213028DEST_PATH_IMAGE002
2. Air inlet pipe orifice
Figure 972911DEST_PATH_IMAGE004
Figure 972911DEST_PATH_IMAGE004
31 is communicated with a nitrogen pipeline and is accessed with high-pressure nitrogen;
Figure DEST_PATH_IMAGE012
adjusting pressure regulating valve
Figure 159173DEST_PATH_IMAGE002
Figure 159173DEST_PATH_IMAGE002
4, keeping the nitrogen pressure of the gas outlet 30 at 0.3MPa, slowly approaching the slag-off plate 12 to the iron slag liquid level, and blowing away the iron slag around the slag-off plate 12 by the nitrogen sprayed from the gas outlet 30 and keeping away from the slag-off plate 12;
Figure DEST_PATH_IMAGE014
slowly inserting the slag skimming plate 12 into the liquid level of the iron slag, and adjusting the pressure regulating valve
Figure 928284DEST_PATH_IMAGE002
Figure 928284DEST_PATH_IMAGE002
4，Keeping the pressure of nitrogen at the gas outlet 30 at 1.0MPa, enabling the nitrogen sprayed from the gas outlet 30 to be blown into the iron slag and the molten iron to form nitrogen bubbles, driving the iron slag to be far away from the slag skimming plate 12 in the process that the nitrogen bubbles float in the molten iron and the iron slag, forming a bubble area which cannot be approached by the iron slag around the slag skimming plate 12, moving the slag skimming plate 12, pushing the bubble area to drive the iron slag to move along the moving direction of the slag skimming plate 12, and realizing slag skimming;
Figure DEST_PATH_IMAGE016
after the slag skimming is finished, the pressure regulating valve is used for regulating the pressure of the slag skimming plate 12 after the slag skimming plate is lifted away from the surface of the iron slag
Figure 86864DEST_PATH_IMAGE004
And 32, opening, filling high-pressure nitrogen into the air injection tank 8, injecting the nitrogen from the nozzle 22 to the surface of the slag removing plate 12, and cooling the slag removing plate 12.
The device of the utility model is simple in structure, easily operation has realized the quick, clean operation of taking off the sediment of iron slag after the hot metal preliminary treatment, through the cooling processing of nitrogen gas, has improved the life-span of taking off the sediment board, reduces and changes the number of times, has improved the production rhythm.

Claims (8)

1. The molten iron pretreatment slag removing device comprises a slag removing arm (1), a slag removing head plate (9) and a slag removing plate (12), and is characterized by also comprising an air inlet pipe orifice
Figure DEST_PATH_IMAGE001
(2) Trachea and trachea
Figure 341184DEST_PATH_IMAGE001
(6) Connecting pipe fitting
Figure 480916DEST_PATH_IMAGE001
(7) An air inlet (28), an internal air passage (29), an air outlet (30), a pipe clip
Figure 370374DEST_PATH_IMAGE001
(5) The gas inlet (28), the internal gas circuit (29) and the gas outlet (30) are arranged on the slag scraping plate (12) to form a communicated gas channel, the internal gas circuit (29) is an annular gas circuit pipeline, the gas inlet (28) is arranged on the upper end surface of the slag scraping plate (12) and communicated with the internal gas circuit (29), the gas outlet (30) is arranged on the lower end surface of the slag scraping plate (12) and communicated with the internal gas circuit (29), and the gas inlet pipe orifice is arranged on the lower end surface of the slag scraping plate (12)
Figure 921573DEST_PATH_IMAGE001
(2) Trachea and trachea
Figure 471240DEST_PATH_IMAGE001
(6) Is communicated with the air pipe
Figure 865313DEST_PATH_IMAGE001
(6) By connecting pipe fittings
Figure 27304DEST_PATH_IMAGE001
(7) Is communicated with an air inlet (28), and the air inlet pipe orifice
Figure 931544DEST_PATH_IMAGE001
(2) Trachea and trachea
Figure 153577DEST_PATH_IMAGE001
(6) Passing pipe clamp
Figure 503787DEST_PATH_IMAGE001
(5) Is fixedly assembled on the slag raking arm (1).
2. The molten iron pretreatment slag removing device as claimed in claim 1, wherein a protective hanger (18) is arranged at the lower part of the slag removing arm (1), the protective hanger (18) is shaped like a Chinese character 'ji', a gas spraying tank (8) is arranged on the protective hanger (18), the gas spraying tank (8) is a cylindrical tank body, a nozzle (22) is arranged at the lower part of the side surface, and the nozzle (22) faces the slag removing plate(12) An air inlet pipe orifice is arranged on the slag raking arm (1)
Figure 469469DEST_PATH_IMAGE002
(31) Trachea and trachea
Figure 87270DEST_PATH_IMAGE002
(34) The two are assembled and communicated with each other, the air pipe
Figure 745785DEST_PATH_IMAGE002
(34) By connecting pipe fittings
Figure 848870DEST_PATH_IMAGE002
(35) Is assembled and communicated with a gas spraying tank (8), and the gas inlet pipe orifice
Figure 352664DEST_PATH_IMAGE002
(31) Trachea and trachea
Figure 965916DEST_PATH_IMAGE002
(34) Passing pipe clamp
Figure 529753DEST_PATH_IMAGE002
(33) Is assembled and fixed on the slag raking arm (1).
3. The molten iron pretreatment slag raking device as set forth in claim 1, wherein the air inlet nozzle
Figure 120134DEST_PATH_IMAGE001
(2) Is provided with a pressure regulating valve
Figure 660575DEST_PATH_IMAGE001
（4）。
4. The molten iron pretreatment slag raking device as set forth in claim 2, wherein the air inlet nozzle
Figure 20012DEST_PATH_IMAGE002
(31) Is provided with a pressure regulating valve
Figure 754750DEST_PATH_IMAGE002
（32）。
5. The molten iron pretreatment slag removing device as claimed in claim 1, wherein the gas outlets (30) are small holes with a diameter of 3-6 mm, the rows are 1-3, and the gas outlets (30) are uniformly distributed on the lower end surface of the slag removing plate (12) with a distance of 50-100 mm.
6. The molten iron pretreatment slag removing device as claimed in claim 2, wherein the diameter of the nozzles (22) is 5-10 mm, the distance between the nozzles (22) in 3-5 rows is 50-120 mm, the nozzles are uniformly distributed at the lower part of the side surface of the gas spray tank (8), and the intersection point of the central line of the nozzle in the lowest row of the nozzles (22) and the slag removing plate (12) is 50-60 mm away from the lowest part of the slag removing plate (12).
7. The molten iron pretreatment slag-raking device as set forth in claim 2, characterized in that a heat-insulating plate (16) is fitted between the bottom of the gas-jetting tank (8) and the protective hanger (18).
8. The molten iron pretreatment slag removing device as claimed in claim 2, wherein a movable groove (20) is arranged at the assembling part of the protective hanger (18) and the slag removing arm (1), and the protective hanger (18) is assembled and fixed on the slag removing arm (1) through the movable groove (20) by a bolt (19).
CN202120212190.9U 2021-01-26 2021-01-26 Slag removing device for molten iron pretreatment Active CN214977732U (en)

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Application Number Priority Date Filing Date Title
CN202120212190.9U CN214977732U (en) 2021-01-26 2021-01-26 Slag removing device for molten iron pretreatment

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Application Number Priority Date Filing Date Title
CN202120212190.9U CN214977732U (en) 2021-01-26 2021-01-26 Slag removing device for molten iron pretreatment

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Publication Number Publication Date
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