CN203653608U - Low-thermal-stress desulfurizing lance for pre-treating molten iron - Google Patents
Low-thermal-stress desulfurizing lance for pre-treating molten iron Download PDFInfo
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- CN203653608U CN203653608U CN201420020982.6U CN201420020982U CN203653608U CN 203653608 U CN203653608 U CN 203653608U CN 201420020982 U CN201420020982 U CN 201420020982U CN 203653608 U CN203653608 U CN 203653608U
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- reinforced pipe
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Abstract
The utility model relates to a low-thermal-stress desulfurizing lance for pre-treating molten iron. The technical scheme is as follows: 3-4 small reinforcement tubes (1) are uniformly fixed on the outer wall of an injection pipe (2), and large reinforcement tubes (3) are sleeved at the peripheries of the reinforcement tubes (1). 8-15 layers of first anchoring parts (4) are uniformly welded on the outer wall of the injection pipe (2) along the axis direction; each of the first anchoring parts (4) is located between the respective corresponding small reinforcement tubes (1), and the outer ends of the first anchoring parts (4) at the topmost layer and the bottommost layer are welded on the inner walls of the large reinforcement tubes (3); 10-20 layers of second anchoring parts (5) are uniformly welded on the outer walls of the large reinforcement tubes (3) along the axis direction, and 3-6 second anchoring parts are arranged at each layer. The lower end of the injection pipe (2) is communicated with an inner tube (7) with a nozzle hole, and a central line of the injection pipe (2) is vertical to a central line of the inner tube (7) with the nozzle hole. An outer refractory lining (6) formed by pouring is integrated with the injection pipe (2), the small reinforcement tubes (1), the large reinforcement tubes (3), the inner tube (7) with the nozzle hole, the first anchoring parts (4) and the second anchoring parts (5). The low-thermal-stress desulfurizing lance has the characteristics of simple structure and long service life.
Description
Technical field
The utility model belongs to desulfurizing iron apparatus field.Relate in particular to the low thermal stress desulphurization spray gun that a kind of hot metal pretreatment is used.
Background technology
External desulfurization of hot metal injection technology was developed so far and is widely used from the 1950's.This technology can adapt to various sweetening agent preferably, has given full play to the sweetening power of sweetening agent, reaches good sweetening effectiveness.
Spray gun is the important component part of blowing desulfurization equipment, and its working conditions is severe, in the molten iron of 1350 ° ~ 1400 °, frequently bears thermal shocking.The injection tube of spray gun and rifle body refractory materials physical parameter difference are excessive, and under the condition of high temperature, the thermal stresses causing because of differing temps gradient often can cause body of spray gun rifle to crack the phenomenons such as even generation perforation.Short and the high in cost of production problem of ubiquity rifle body life time.
At present, the spray gun that pre-treatment is used of jetting outward of the molten iron furnace before metallurgy industry converter steelmaking, is made up of two portions conventionally, and the one, barral of a gun, the 2nd, rifle body.Barral of a gun is for fixing whole desulphurization system, and rifle body comprises refractory materials outer lining, reinforced pipe, injection tube, anchoring piece and spray orifice inner tube.As: " long-lived desulfurizing spray gun for flat iron reinforcing plate " (ZL01252249 X) patented technology and " hot metal pretreatment spray gun " although (ZL01251907.3) patented technology has solved spray gun injection tube and the rifle head problem that comes off preferably, and extended the spray gun average operation time, but still there is the longitudinal crack problem producing because of reinforced pipe or stiffening web differential expansion, and the problem such as local shedding and injection tube ablation of the refractory materials outer lining causing because of longitudinal crack, thereby further improve the work-ing life of having limited spray gun.
Summary of the invention
The utility model is intended to overcome the deficiencies in the prior art, and object is to provide the low thermal stress desulphurization spray gun that a kind of hot metal pretreatment simple in structure and that the life-span is long is used.
To achieve these goals, the technical solution adopted in the utility model is: the outer wall of injection tube is fixed with 3 ~ 4 little reinforced pipes equably, and the outer race of little reinforced pipe has large reinforced pipe, large reinforced pipe and the concentricity setting of injection tube.Be welded with equably 8 ~ 15 layer of first anchoring piece at injection tube outer wall along axis direction, the quantity of every layer of first anchoring piece is identical with the quantity of little reinforced pipe, each the first anchoring piece is positioned between each self-corresponding little reinforced pipe, the outer end of the superiors and undermost the first anchoring piece is welded on the inwall of large reinforced pipe, large reinforced pipe outer wall is welded with the second anchoring piece equably, the second anchoring piece is 10 ~ 20 layers along axis direction, and every layer is 3 ~ 6.The lower end of injection tube communicates with spray orifice inner tube, and the medullary ray of injection tube is vertical with the medullary ray of spray orifice inner tube.The refractory materials outer lining that cast forms and injection tube, little reinforced pipe, large reinforced pipe, spray orifice inner tube, the first anchoring piece and the second anchoring piece are integrated.
The upper end of refractory materials outer lining is stretched out in the upper end of injection tube, and spray orifice inner tube is flatly arranged on the close lower end of refractory materials outer lining, and the two ends port of spray orifice inner tube is positioned at the outer wall place of refractory materials outer lining.Little reinforced pipe is all concordant with the upper end of refractory materials outer lining with the upper end of large reinforced pipe, and the lower end of little reinforced pipe and large reinforced pipe is positioned at the top of spray orifice inner tube, and little reinforced pipe and the large lower end of reinforced pipe and the vertical range of spray orifice inner tube medullary ray are 100 ~ 300mm.
The diameter of described the first anchoring piece is 5 ~ 7mm, and the length of the first anchoring piece is equal to or less than the half of the difference of large reinforcement bore and injection tube external diameter.
The diameter of described the second anchoring piece is 5 ~ 7mm, and the length of the second anchoring piece is refractory materials outer lining external diameter and 0.3 ~ 0.35 times of the difference of large reinforced pipe external diameter.
Described large reinforced pipe external diameter is 3 ~ 3.5 times of injection tube external diameter.
Described little reinforced pipe external diameter is 0.7 ~ 0.75 times of injection tube external diameter.
Owing to adopting technique scheme, the utility model compared with prior art has following positively effect:
The utility model is fixed on 3 ~ 4 little reinforced pipes the outer wall of injection tube equably, injection tube, little reinforced pipe, large reinforced pipe, spray orifice inner tube, the first anchoring piece and the second anchoring piece are cast for to one with refractory castable, be that refractory materials outer lining and injection tube, little reinforced pipe, large reinforced pipe, spray orifice inner tube, the first anchoring piece and the second anchoring piece are integrated, therefore simple in structure.The temperature that the large reinforced pipe that the utility model adopts bears is higher than injection tube, can effectively reduce the thermal stresses of injection tube, and delays the speed of crackle to injection tube diffusion, thereby, extend the work-ing life of injection tube, improve the work-ing life of desulphurization spray gun.
Therefore, the utlity model has simple in structure and feature long service life.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is the A-A cross-sectional schematic in Fig. 1;
Fig. 3 is the B-B cross-sectional schematic in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail with concrete enforcement, the not restriction to its protection domain.
The low thermal stress desulphurization spray gun that a kind of hot metal pretreatment is used.As shown in Figure 1, Figure 2 and Figure 3: the outer wall of injection tube 2 is fixed with 3 little reinforced pipes 1 equably, and the outer race of little reinforced pipe 1 has large reinforced pipe 3, large reinforced pipe 3 and the concentricity setting of injection tube 2.Be welded with equably 15 layer of first anchoring piece 4 at injection tube 2 outer walls along axis direction, the quantity of every layer of first anchoring piece 4 is identical with the quantity of little reinforced pipe 1, each the first anchoring piece 4 is positioned at 1 of each self-corresponding little reinforced pipe, the outer end of the superiors and undermost the first anchoring piece 4 is welded on the inwall of large reinforced pipe 3, large reinforced pipe 3 outer walls are welded with the second anchoring piece 5 equably, the second anchoring piece 5 is 20 layers along axis direction, and every layer is 3.The lower end of injection tube 2 communicates with spray orifice inner tube 7, and the medullary ray of injection tube 2 is vertical with the medullary ray of spray orifice inner tube 7.The refractory materials outer lining 6 that cast forms is integrated with injection tube 2, little reinforced pipe 1, large reinforced pipe 3, spray orifice inner tube 7, the first anchoring piece 4 and the second anchoring piece 5.
The upper end of refractory materials outer lining 6 is stretched out in the upper end of injection tube 2, and spray orifice inner tube 7 is flatly arranged on the close lower end of refractory materials outer lining 6, and the two ends port of spray orifice inner tube 7 is positioned at the outer wall place of refractory materials outer lining 6; Little reinforced pipe 1 is all concordant with the upper end of refractory materials outer lining 6 with the upper end of large reinforced pipe 3, the lower end of little reinforced pipe 1 and large reinforced pipe 3 is positioned at the top of spray orifice inner tube 7, and little reinforced pipe 1 and the large lower end of reinforced pipe 3 and the vertical range of spray orifice inner tube 7 medullary rays are 100 ~ 200mm.
The diameter of described the first anchoring piece 4 is 5 ~ 7mm, and the length of the first anchoring piece 4 is equal to or less than the half of the difference of large reinforced pipe 3 internal diameters and injection tube 2 external diameters.
The diameter of described the second anchoring piece 5 is 5 ~ 7mm, and the length of the second anchoring piece 5 is refractory materials outer lining 6 external diameters and 0.3 ~ 0.35 times of the difference of large reinforced pipe 3 external diameters.
The external diameter of described large reinforced pipe 3 is 3 ~ 3.5 times of external diameter of injection tube 2.
The external diameter of described little reinforced pipe 3 is 0.7 ~ 0.75 times of external diameter of injection tube 2.
The low thermal stress desulphurization spray gun that a kind of hot metal pretreatment is used.Except following technical parameter, all the other are with embodiment 1:
The outer wall of injection tube 2 is fixed with 4 little reinforced pipes 1 equably, and the outer race of little reinforced pipe 1 has large reinforced pipe 3, large reinforced pipe 3 and the concentricity setting of injection tube 2.Be welded with equably 8 ~ 14 layer of first anchoring piece 4 at injection tube 2 outer walls along axis direction, every layer of first anchoring piece 4 is 4, the first anchoring piece 4 in every layer is positioned at 1 of corresponding little reinforced pipe, the outer end of the superiors and undermost the first anchoring piece 4 is welded on the inwall of large reinforced pipe 3, large reinforced pipe 3 outer walls are welded with the second anchoring piece 5 equably, the second anchoring piece 5 is 10 ~ 19 layers along axis direction, and every layer is 3 ~ 6.The lower end of injection tube 2 communicates with spray orifice inner tube 7, and the medullary ray of injection tube 2 is vertical with the medullary ray of spray orifice inner tube 7.The refractory materials outer lining 6 that cast forms is integrated with injection tube 2, little reinforced pipe 1, large reinforced pipe 3, spray orifice inner tube 7, the first anchoring piece 4 and the second anchoring piece 5.
The upper end of refractory materials outer lining 6 is stretched out in the upper end of injection tube 2, and spray orifice inner tube 7 is flatly arranged on the close lower end of refractory materials outer lining 6, and the two ends port of spray orifice inner tube 7 is positioned at the outer wall place of refractory materials outer lining 6; Little reinforced pipe 1 is all concordant with the upper end of refractory materials outer lining 6 with the upper end of large reinforced pipe 3, the lower end of little reinforced pipe 1 and large reinforced pipe 3 is positioned at the top of spray orifice inner tube 7, and little reinforced pipe 1 and the large lower end of reinforced pipe 3 and the vertical range of spray orifice inner tube 7 medullary rays are 200 ~ 300mm.
This embodiment is fixed on 3 ~ 4 little reinforced pipes 1 outer wall of injection tube 2 equably, injection tube 2, little reinforced pipe 1, large reinforced pipe 3, spray orifice inner tube 7, the first anchoring piece 4 and the second anchoring piece 5 are cast for to one with refractory castable, be that refractory materials outer lining 6 is integrated with injection tube 2, little reinforced pipe 1, large reinforced pipe 3, spray orifice inner tube 7, the first anchoring piece 4 and the second anchoring piece 5, therefore simple in structure.The temperature that the large reinforced pipe 3 that this embodiment adopts bears is than injection tube 2 height, can effectively reduce the thermal stresses of injection tube 2, and delay the speed that crackle spreads to injection tube 2, thereby, extend the work-ing life of injection tube 2, the work-ing life of having improved desulphurization spray gun.
Therefore, this embodiment has simple in structure and feature long service life.
Claims (5)
1. the low thermal stress desulphurization spray gun that hot metal pretreatment is used, the structure that it is characterized in that described desulphurization spray gun is: the outer wall of injection tube (2) is fixed with 3 ~ 4 little reinforced pipes (1) equably, the outer race of little reinforced pipe (1) has large reinforced pipe (3), large reinforced pipe (3) and the concentricity setting of injection tube (2); Be welded with equably 8 ~ 15 layer of first anchoring piece (4) at injection tube (2) outer wall along axis direction, the quantity of every layer of first anchoring piece (4) is identical with the quantity of little reinforced pipe (1), each the first anchoring piece (4) is positioned between each self-corresponding little reinforced pipe (1), the outer end of the superiors and undermost the first anchoring piece (4) is welded on the inwall of large reinforced pipe (3), large reinforced pipe (3) outer wall is welded with the second anchoring piece (5) equably, the second anchoring piece (5) is 10 ~ 20 layers along axis direction, and every layer is 3 ~ 6; The lower end of injection tube (2) communicates with spray orifice inner tube (7), and the medullary ray of injection tube (2) is vertical with the medullary ray of spray orifice inner tube (7); The refractory materials outer lining (6) that cast forms is integrated with injection tube (2), little reinforced pipe (1), large reinforced pipe (3), spray orifice inner tube (7), the first anchoring piece (4) and the second anchoring piece (5);
The upper end of refractory materials outer lining (6) is stretched out in the upper end of injection tube (2), spray orifice inner tube (7) is flatly arranged on the close lower end of refractory materials outer lining (6), and the two ends port of spray orifice inner tube (7) is positioned at the outer wall place of refractory materials outer lining (6); Little reinforced pipe (1) is all concordant with the upper end of refractory materials outer lining (6) with the upper end of large reinforced pipe (3), the lower end of little reinforced pipe (1) and large reinforced pipe (3) is positioned at the top of spray orifice inner tube (7), and little reinforced pipe (1) and the large lower end of reinforced pipe (3) and the vertical range of spray orifice inner tube (7) medullary ray are 100 ~ 300mm.
2. the low thermal stress desulphurization spray gun that hot metal pretreatment is used according to claim 1, the diameter that it is characterized in that described the first anchoring piece (4) is 5 ~ 7mm, and the length of the first anchoring piece (4) is equal to or less than the half of the difference of large reinforced pipe (3) internal diameter and injection tube (2) external diameter.
3. the low thermal stress desulphurization spray gun that hot metal pretreatment is used according to claim 1, the diameter that it is characterized in that described the second anchoring piece (5) is 5 ~ 7mm, and the length of the second anchoring piece (5) is refractory materials outer lining (6) external diameter and 0.3 ~ 0.35 times of the difference of large reinforced pipe (3) external diameter.
4. the low thermal stress desulphurization spray gun that hot metal pretreatment is used according to claim 1, is characterized in that described large reinforced pipe (3) external diameter is 3 ~ 3.5 times of injection tube (2) external diameter.
5. the low thermal stress desulphurization spray gun that hot metal pretreatment is used according to claim 1, is characterized in that described little reinforced pipe (3) external diameter is 0.7 ~ 0.75 times of injection tube (2) external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420020982.6U CN203653608U (en) | 2014-01-14 | 2014-01-14 | Low-thermal-stress desulfurizing lance for pre-treating molten iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420020982.6U CN203653608U (en) | 2014-01-14 | 2014-01-14 | Low-thermal-stress desulfurizing lance for pre-treating molten iron |
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| Publication Number | Publication Date |
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| CN203653608U true CN203653608U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420020982.6U Expired - Fee Related CN203653608U (en) | 2014-01-14 | 2014-01-14 | Low-thermal-stress desulfurizing lance for pre-treating molten iron |
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| CN (1) | CN203653608U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103740882A (en) * | 2014-01-14 | 2014-04-23 | 武汉科技大学 | Desulfurization spray gun with two layers of reinforcing tubes |
| CN108048620A (en) * | 2017-12-25 | 2018-05-18 | 武汉科技大学 | A kind of revolving furnace sublance gun body based on vacuum structure |
-
2014
- 2014-01-14 CN CN201420020982.6U patent/CN203653608U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103740882A (en) * | 2014-01-14 | 2014-04-23 | 武汉科技大学 | Desulfurization spray gun with two layers of reinforcing tubes |
| CN108048620A (en) * | 2017-12-25 | 2018-05-18 | 武汉科技大学 | A kind of revolving furnace sublance gun body based on vacuum structure |
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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: 20140618 Termination date: 20190114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |