CN202144497U - Straight blow pipe device of blast furnace air supply system - Google Patents
Straight blow pipe device of blast furnace air supply system Download PDFInfo
- Publication number
- CN202144497U CN202144497U CN201120147247U CN201120147247U CN202144497U CN 202144497 U CN202144497 U CN 202144497U CN 201120147247 U CN201120147247 U CN 201120147247U CN 201120147247 U CN201120147247 U CN 201120147247U CN 202144497 U CN202144497 U CN 202144497U
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- China
- Prior art keywords
- spray gun
- blow pipe
- blast furnace
- straight blow
- belly pipe
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to a straight blow pipe device of a blast furnace air supply system, which comprises a straight blow pipe and a spray gun sleeve, wherein the tail end of the straight blow pipe is fixed with a flange; the straight blow pipe is internally provided with a fireproof material; the spray gun sleeve is inserted into the straight blow pipe in an inclined way from the outer side of the straight blow pipe; the straight blow pipe device of the blast furnace air supply system is characterized in that the internal diameter phi of the spray gun sleeve is 50-60mm; the included angle between the axis of the spray gun sleeve and the axis of the straight blow pipe is 10 degrees; the distance between the front end of the straight blow pipe and the intersection point of the axes of the spray gun sleeve and straight blow pipe is 170+/-5mm; and the distance between the tail end of the spray gun sleeve and the intersection point of the axes of the spray gun sleeve and straight blow pipe is 2100-2220mm. The straight blow pipe device of the blast furnace air supply system reduces abrasion of pulverized coal for an air hole, thus reducing the times for replacing and increasing the yield of a blast furnace.
Description
Technical field
The utility model relates to a kind of belly pipe device of blast furnace air supply system.
Background technology
Blast furnace air supply system is the major equipment that blast-furnace smelting provides hot blast, bears high temperature (1150-1200 ℃), high pressure (0.3-0.35MPa).The belly pipe of supply air system is set up the spray gun sleeve pipe; The coal powder injection spray gun inserts in the air port through the spray gun sleeve pipe; During the blast furnace ordinary production coal dust is sprayed in the blast furnace, but coal dust instead of part metallurgical coke in the spirt stove, and coal injection is many more; The alternate metallurgical coke is many more, can reach to reduce coke ratio, strong, the effects such as environmental pollution when reducing coking of raising smelting.Applicant's 1650m
3After blast furnace was gone into operation from 2000, belly pipe spray gun and belly pipe angle were 11 °, and the spray gun sleeve pipe is the steel pipe of φ 38 * 4mm; Spray gun can only use φ 20mm specification because caliber is thin, cause hour injecting coal quantity low (≤24t/h); Also very easily make gun head burn red stain shape, and angle of gun is big, spray gun can not be inserted into inlet front end; Downwarping when the rifle head burns red stain shape, the air port phenomenon of often grinding away, generally the monthly average air port number of grinding away is 5.
Summary of the invention
For the above-mentioned deficiency of the belly pipe device that overcomes existing blast furnace air supply system, the utility model provides a kind of wearing and tearing that reduce coal dust to the air port, corrodes, and effectively protects the air port, prolongs the belly pipe device of the blast furnace air supply system in air port work-ing life.
The belly pipe device of this blast furnace air supply system comprises belly pipe and spray gun sleeve pipe; The tail end of belly pipe is being fixed flange; Refractory materials is arranged in belly pipe, and the spray gun sleeve pipe inserts belly pipe from the outer tilt of belly pipe, and it is characterized in that: described spray gun telescopic interior diameter is φ 50-φ 60mm; The angle of the axis of spray gun telescopic axis and belly pipe is 10 °, and the intersection point of the axis of spray gun telescopic axis and belly pipe is 170 ± 5mm apart from the distance of belly pipe front end, and spray gun sleeve pipe tail end is 2100-2220mm to the distance of crossing point of axes.
The utility model is to utilize existing belly pipe to transform, and the angle of the incidental spray gun sleeve pipe of belly pipe and belly pipe is reduced into 10 °, and the minimizing coal dust is to the wearing and tearing in air port; Corrode; Prolong air port work-ing life, reduce and change number of times, reduced the damping down number of times; Increase furnace processor, effectively solved the low and air port problem of grinding away of injecting coal quantity.After spray gun telescopic caliber enlarged, the spray gun diameter was increased to φ 25mm by φ 20mm, and injecting coal quantity is increased to 30t/h by 24t/h; After spray gun sleeve pipe to belly pipe medullary ray intersection point length increases, apart from the inlet front end distance by before 500-600mm reduce to 300-400mm because very little apart from the inlet front end distance; The coal stream of coal powder injection all sprays in the stove, has reduced the air port wearing and tearing, and the air port number of grinding away by the moon drops to 2 by 5; It is 45 minutes that damping down is changed 1 air port time average, and every batch of material amount of tapping a blast furnace is 20 tons, and per hour blanking is 7.5 batches; Hour amount of tapping a blast furnace is 20 * 7.5=150 ton, changes the air port influence at every turn and taps a blast furnace 150 tons less.Adopt the utility model to reduce the air port and change number of times, reduced and changed the influence of air port iron and steel.
Description of drawings
Fig. 1 is the longitudinal sectional view of embodiment of the belly pipe device of this blast furnace air supply system.
Among the above-mentioned figure:
1-spray gun sleeve pipe tail end 2-spray gun sleeve pipe 3-refractory materials 4-belly pipe tube head
5-belly pipe front end 6-crossing point of axes 7-belly pipe 8-water cooling tube
9-flange 10-belly pipe tail end
Embodiment
Specify the embodiment of the belly pipe device of this blast furnace air supply system below in conjunction with embodiment and accompanying drawing thereof, but the embodiment of the belly pipe device of this blast furnace air supply system is not limited to following embodiment.
Embodiment
The belly pipe device of the blast furnace air supply system that Fig. 1 describes comprises belly pipe 7 and spray gun sleeve pipe 2; Belly pipe tail end 10 is being fixed flange 9; Refractory materials 3 is arranged in belly pipe 7; Spray gun sleeve pipe 2 inserts belly pipe from the outer tilt of belly pipe 7, and it is characterized in that: the interior diameter of described spray gun sleeve pipe 2 is φ 55mm; The angle of the axis of the axis of spray gun sleeve pipe 2 and belly pipe 7 is 10 °; The crossing point of axes 6 of the axis of spray gun sleeve pipe 2 and belly pipe 7 is 170mm apart from the distance of belly pipe front end 5; The inlet end of spray gun sleeve pipe tail end 1 is 2100-2220mm to the distance of crossing point of axes 6, and present embodiment is 2160mm.
Present embodiment is 1650m
3The belly pipe device of blast furnace air supply system, belly pipe 7 long 1821mm, interior diameter is φ 350mm, the thickness of inboard refractory materials 3 is 60mm, and water cooling tube 8 longitudinally is installed below belly pipe 7.
Claims (1)
1. the belly pipe device of a blast furnace air supply system; It comprises belly pipe and spray gun sleeve pipe; The tail end of belly pipe is being fixed flange; Refractory materials is arranged in belly pipe, and the spray gun sleeve pipe inserts belly pipe from the outer tilt of belly pipe, and it is characterized in that: described spray gun telescopic interior diameter is φ 50-φ 60mm; The angle of the axis of spray gun telescopic axis and belly pipe is 10 °, and the crossing point of axes of spray gun telescopic axis and belly pipe is 170 ± 5mm apart from the distance of belly pipe front end, and spray gun sleeve pipe tail end is 2100-2220mm to the distance of crossing point of axes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120147247U CN202144497U (en) | 2011-05-08 | 2011-05-08 | Straight blow pipe device of blast furnace air supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120147247U CN202144497U (en) | 2011-05-08 | 2011-05-08 | Straight blow pipe device of blast furnace air supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202144497U true CN202144497U (en) | 2012-02-15 |
Family
ID=45580430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120147247U Expired - Fee Related CN202144497U (en) | 2011-05-08 | 2011-05-08 | Straight blow pipe device of blast furnace air supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202144497U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266191A (en) * | 2013-05-14 | 2013-08-28 | 莱芜钢铁集团有限公司 | Abutting device and method of blast furnace blast belly pipe |
| CN106498107A (en) * | 2016-10-31 | 2017-03-15 | 马鞍山钢铁股份有限公司 | A kind of blast furnace air-supply belly pipe and its method for processing and assembling for avoiding little set abrasion |
-
2011
- 2011-05-08 CN CN201120147247U patent/CN202144497U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266191A (en) * | 2013-05-14 | 2013-08-28 | 莱芜钢铁集团有限公司 | Abutting device and method of blast furnace blast belly pipe |
| CN103266191B (en) * | 2013-05-14 | 2014-11-12 | 莱芜钢铁集团有限公司 | Abutting device and method of blast furnace blast belly pipe |
| CN106498107A (en) * | 2016-10-31 | 2017-03-15 | 马鞍山钢铁股份有限公司 | A kind of blast furnace air-supply belly pipe and its method for processing and assembling for avoiding little set abrasion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120215 Termination date: 20170508 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |