KR101650707B1 - Repairing material spraying apparatus for furnace inner wall - Google Patents
Repairing material spraying apparatus for furnace inner wall Download PDFInfo
- Publication number
- KR101650707B1 KR101650707B1 KR1020150172234A KR20150172234A KR101650707B1 KR 101650707 B1 KR101650707 B1 KR 101650707B1 KR 1020150172234 A KR1020150172234 A KR 1020150172234A KR 20150172234 A KR20150172234 A KR 20150172234A KR 101650707 B1 KR101650707 B1 KR 101650707B1
- Authority
- KR
- South Korea
- Prior art keywords
- nose
- tube
- rotary
- nose portion
- repair material
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
- B05B3/0409—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements
- B05B3/0418—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements comprising a liquid driven rotor, e.g. a turbine
- B05B3/0422—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements comprising a liquid driven rotor, e.g. a turbine with rotating outlet elements
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
- C21B7/06—Linings for furnaces
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
The present invention relates to a rotary nozzle body and a blast furnace wall maintenance material spraying apparatus including the same, and more particularly, to a spray nozzle for spraying a spray nozzle of a spray nozzle, And a blast furnace wall maintenance material injection device including such a rotation nozzle body.
Generally, the blast furnace is charged with coke as fuel and iron ore as a raw material through the inlet of the furnace, blowing hot air through a tuyere at the bottom of the furnace to burn the coke to produce heat and reducing gas, The iron ores in the furnace are reduced and melted to produce molten iron and slag, and the molten iron is configured to be discharged through an outlet at the lower part of the furnace, thereby enabling continuous production of molten iron.
The main body structure of the blast furnace is made of refractory material with high strength which can withstand high temperature and gas, and the inside of the furnace is cooled by inserting a cooling bed between the burned and refractory materials, And to protect the scum.
However, as the blast furnace ages increase, the damage and wear of the refractories progress, and / or the protrusion of the cooling zone becomes severe, the amount of the cooling half damage increases, Therefore, in order to overcome such a problem, it is necessary to repair the furnace wall, and the furnace wall is usually remodeled every six months in consideration of the fact that the castable refractory has a service life of 5 to 6 months.
As a method for repairing the furnace wall, methods such as pressurizing the furnace body and spraying the furnace wall are widely used.
The impregnation of the furnace body is performed in a state in which the charge is filled in the furnace, and the refuse of the damaged portion is poured into the furnace through the hole from the outside of the furnace through the hole and the refractory of the damaged furnace body is repaired Method.
In addition, a method of spraying and repairing the furnace wall is a method of reducing the amount of the charge in the blast furnace to a site to be furnace walled and / or tuyere, and allowing the nozzle body connected to the wire rope of the manipulator to enter the furnace, And then the repair material is sprayed onto the refractory surface formed on the inner surface of the furnace wall through the nozzle portion connected to the nozzle body. At this time, the maintenance material stored in the reservoir provided outside the blast furnace is supplied to the nozzle unit through the feed gun and the supply hose. The maintenance material is attached to the inner wall of the blast furnace by concentrically spraying the repair material made of refractory material (castable) during the operation of spraying the repair material to the refractory side through the nozzle part, Thereby forming a solid refractory layer.
As described above, the method of spraying and repairing the furnace wall has various advantages such as easy construction and maintenance without completely stopping the blast furnace. However, the maintenance material sprayed through the nozzle portion during the repair work And the rebound loss can form a certain layer inside the furnace. Such a rebound loss layer can promote the deposit growth inside the furnace, , Which may interfere with the normal flow of the gas stream and / or interfere with the melting of the charge in the blast furnace, thereby acting as a long-term instability factor of the operation. Also, if the long-term high-temperature operation is continued to remove the rebound loss layer after the repair work of the furnace wall, the refractory of the blast furnace is damaged and the silicon in the charcoal is elevated.
Further, if the amount of the rebound loss layer due to the maintenance material falling off without being attached to the wall after the injection is relatively increased, the loss of the material cost is increased, and when the increase in the operating capacity, the normal operation return is delayed .
Disclosure of the Invention The present invention has been conceived to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a spray nozzle, And an object of the present invention is to provide a blast furnace wall maintenance material spraying device including such a rotating nozzle body.
According to an aspect of the present invention, there is provided a dispenser comprising: a first body for supplying a first jet; A second tube connected to the first tube for supplying a second jet; A nose fixing portion to which the first tube is connected; And a rotary nose portion rotatably fixed to the nose fixing portion and including at least one or more rotor blades.
The nose fixing part may further include a pneumatic path connected to the pneumatic tube.
The rotor blade may preferably be included within a range of 2 to 8.
At least one bearing may be further included between the nose fixing portion and the rotation nose portion.
The first tube may further include a separation tube extending from an end of the second tube connected to the first tube to an end of the first tube.
The inner wall of the rotary nose portion may further include a stirring blade.
The stirring ripe may be fixed to an inclined portion whose inner diameter of the rotary nose portion is narrowed toward the end portion in the longitudinal direction of the rotary nose portion.
According to another aspect of the present invention, there is provided a rotary nozzle apparatus comprising: the rotary nozzle body, wherein the first jet is made of a repair material, and the second jet is provided in a quick-setting vessel, .
According to the blast furnace wall repair material spraying apparatus of the present invention, it is possible to prevent the flocculation of the spraying device, particularly the nose portion, of the maintenance material at the time of spraying of the repair material, and reduce the rebound loss of the repair material, So that the repair of the furnace wall can be ensured and at the same time, the steady operation of the blast furnace can be performed quickly, thereby improving the productivity of the molten iron.
1 is a side sectional view schematically showing a state in which a blast furnace wall repair material spraying device is located in a blast furnace.
2 is a side cross-sectional view schematically showing one specific example of a conventional nozzle unit constituting a blast furnace wall repair material spraying apparatus.
3 is a side sectional view schematically showing one embodiment of a blast furnace wall repair material spraying device including a rotating nozzle body having a rotating nose portion according to the present invention constituting a blast furnace wall repair material spraying device.
4 is an exploded perspective view showing the inside of a rotating nose portion in the rotating nozzle body of Fig. 3;
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in Figs. 3 and 4, the rotary nozzle body 11 according to one aspect of the present invention includes a
The first
The repair material A may be preferably castable. The castable or castable refractory is composed of refractory aggregates such as alumina, magnesia, chromia, and a matrix composed of refractory fine particles and an inorganic binder such as alumina cement. The fluidity and molding I have sex. In addition, ultrafine inorganic admixtures such as silica fume and reactive alumina, which can diversify the particle size distribution of the dispersed part, can be incorporated into the fine part for improving densification and fluidity, An organic admixture such as a plastisizer, an air entraining agent, or a set modifier may be added. The castable is mixed according to the composition of the mortar mixer and refractory, and then molded into a refractory shape. Particularly, in the case of spraying through the nozzle and adhering to the wall of the furnace as in the present invention, it is preferable that the rapid dispenser is further mixed with the repair material immediately before and / or after the spraying of the repair material. The rapid dispenser facilitates the rapid joining and / or assembly of the repair material, thereby enhancing the adhesion rate attached to the wall immediately after the spraying, thereby smoothly performing the repair of the furnace wall.
The second
The quick-setting admixture B functions to smoothly perform the repair of the furnace walls by rapidly attaching and / or assembling the repair material A to increase the adhesion rate attached to the wall immediately after spraying, And a synthetic resin.
The
Preferably, at least one bearing, preferably between the
4, the rotating
The
The stirring
According to another aspect of the present invention, there is provided a blast furnace wall maintenance material spraying apparatus including the rotating nozzle body (11). That is, the rotary nozzle body 11 having the above-described configuration can be fixed to the end portion of the
(Example) using a blast furnace wall repair material spraying device including the rotating nozzle body 11 according to the present invention and a
Loss
As shown in Table 1, according to the present invention, by applying the rotating nozzle body including the rotating nose portion, it is possible to significantly reduce the amount of rebound loss generated in the maintenance material, compared with the use of the nozzle body including the conventional fixed nose portion I could confirm.
1: Blast Furnace 2: Evil
3: Roof wall 4:
5: outlet 6: nozzle body
7: nozzle unit 71:
72: side tube 73: separation tube
74: Nosubu
8: wire 9: manipulator
11: Rotating nozzle body 12: First tube
13: Second tube body 14: Separation tube
15: Nose fixing part 151: Pneumatic
152: Pneumatic tube 153: First bearing
154: Second bearing
16: Rotating nose portion 161: Rotor blade
162: stirring strength
A: Repair material B:
x: straight line part y:
Claims (8)
A second tube connected to the first tube for supplying a second jet;
A nose fixing portion to which the first tube is connected; And
A rotating nose portion rotatably fixed to the nose fixing portion and including at least one rotor blade;
And a plurality of rotatable nozzle bodies.
Wherein the nose fixing part further includes a pneumatic path connected to the pneumatic tube,
Wherein the rotor blade is included within a range of 2 to 8 rotations.
Wherein at least one bearing is further provided between the nose fixing part and the rotation nose part.
Further comprising a separation tube extending from the end of the second tube body connected to the first tube body to the end of the first tube body in the first tube body.
And a stirring blade is further included in an inner wall of the rotary nose portion.
Wherein the stirring wing is fixed to an inclined portion whose inner diameter of the rotating nose portion is narrowed toward the end in the longitudinal direction of the rotating nose portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150172234A KR101650707B1 (en) | 2015-12-04 | 2015-12-04 | Repairing material spraying apparatus for furnace inner wall |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150172234A KR101650707B1 (en) | 2015-12-04 | 2015-12-04 | Repairing material spraying apparatus for furnace inner wall |
Publications (1)
Publication Number | Publication Date |
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KR101650707B1 true KR101650707B1 (en) | 2016-08-24 |
Family
ID=56884396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020150172234A KR101650707B1 (en) | 2015-12-04 | 2015-12-04 | Repairing material spraying apparatus for furnace inner wall |
Country Status (1)
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KR (1) | KR101650707B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0995718A (en) * | 1995-09-29 | 1997-04-08 | Kawasaki Steel Corp | Device for working iron tapping runner |
KR20020048559A (en) | 2000-12-18 | 2002-06-24 | 이구택 | apparatus for spraying castable to wall of furnace |
KR20020055189A (en) | 2000-12-28 | 2002-07-08 | 이구택 | Spray apparatus for repairing the wall of the furnace |
-
2015
- 2015-12-04 KR KR1020150172234A patent/KR101650707B1/en active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0995718A (en) * | 1995-09-29 | 1997-04-08 | Kawasaki Steel Corp | Device for working iron tapping runner |
KR20020048559A (en) | 2000-12-18 | 2002-06-24 | 이구택 | apparatus for spraying castable to wall of furnace |
KR20020055189A (en) | 2000-12-28 | 2002-07-08 | 이구택 | Spray apparatus for repairing the wall of the furnace |
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