CN2656428Y - Oxygen gun spray head for converter - Google Patents
Oxygen gun spray head for converter Download PDFInfo
- Publication number
- CN2656428Y CN2656428Y CN 03229929 CN03229929U CN2656428Y CN 2656428 Y CN2656428 Y CN 2656428Y CN 03229929 CN03229929 CN 03229929 CN 03229929 U CN03229929 U CN 03229929U CN 2656428 Y CN2656428 Y CN 2656428Y
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- China
- Prior art keywords
- spray head
- converter
- spray
- oxygen
- outlet
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- Expired - Lifetime
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Abstract
The utility model relates to an oxygen gun spray head for a converter, which comprises a spray head body on which a plurality of spray holes are arranged. An included angle alpha is formed between the spray holes and the axial line of the spray head body. The oxygen gun spray head for a converter is characterized in that a spray pipe of the spray holes is near in a through shape, the diameter of the outlet of the spray pipe is unequal to the diameter of a laryngeal orifice, and the mach number M of the outlet of the spray pipe is 1.1 to 1.5. Compared with the prior art, the outlet of the spray pipe of the utility model is slightly expanded, the mach number M of the outlet is 1.1 to 1.5, and the stagnation pressure of the spray head is 0.15 to 0.7 Mpa. The oxygen gun spray head for a converter can effectively improve the attenuation of oxygen stream, the dephosphorization effect, the lifespan of the spray head, etc., furthermore, the spray head works in low flow quantity and can also normally design an oxygen pressing zone, the impact energy (penetration depth) is low, the impact area is large, the effect that the iron melt dephosphorizes is good, the carbon content of the iron melt is high after the iron melt dephosphorizes.
Description
Technical field
The utility model relates to ferrous metallurgy converter steelmaking field, particularly is used for the converter dephosphorization of molten iron and handles.
Background technology
The technology that converter current steel-making is extensively adopted is the outer pretreatment desulfurizing of molten iron stove, dephosphorization, desiliconization, decarburization and intensification in converter then.Because the fast requirement of decarburization, the top blow oxygen lance shower nozzle will have high striking energy and impact depth, so sprinkler design becomes high stagnation pressure (0.8-0.9Mpa), big flow (to 300 tons of converter oxygen flows greater than 55000NM
3/ h), the Lavalle type shower nozzle of high Mach number (being generally about 2).Lavalle type shower nozzle, blowing gas Mach number height, the gas percussion energy is big, concentrated, so penetration depth is big, the stirring energy is strong, decarbonization rate is fast.As shown in Figure 1 and Figure 2, it is Lavalle, 4 a hole type shower nozzle, comprises head body 10, has several spray orifices 20 on it; Be characterized in that spray orifice outlet 202 is expansion shape, jet pipe 200 is an arc, and spray orifice exports 202 diameters greater than aditus laryngis 201 injection diameters, and the shower nozzle Mach number is about 2.The shower nozzle that also has converter dephosphorization to use, it has 6 spray orifices, and jet pipe 200 is complete bypass structure, and spray orifice exports 202 diameters and equals aditus laryngis 201 diameters, shower nozzle nozzle exit Mach 2 ship 1, gas percussion is too big.
New converter steelmaking process separates the dephosphorization and the decarburization of molten iron, carries out respectively in different converters.Adopting a block converter to carry out dephosphorization of molten iron and handle, is to utilize when the oxygen gesture is high in the molten iron low temperature slag (P
2O
5)/[P] principle that partition ratio is big, improve dephosphorization rate, reduce the oxidation of [C] in the molten iron simultaneously.Therefore require top rifle hypoxemia flow, low impact energy in smelting operation, reduce the penetration depth of oxygen flow, enlarge impact area, the intensity that improves bottom blowing simultaneously strengthens the stirring in molten bath.
Above-mentioned existing top blow oxygen lance shower nozzle can't satisfy current new converter steelmaking process requirement.
Summary of the invention
The purpose of this utility model is to design a kind of Oxygen Lance Nozzle for Converter, it has, and oxygen flow is low, Mach number is low, impact energy is low, penetration depth is shallow, impact area is big, converting process is characteristics stably, and slagging is quickened dephosphorization fast, reach the requirement of molten iron dephosphorization, guarantor's carbon.
For achieving the above object, the technical solution of the utility model is:
Oxygen Lance Nozzle for Converter comprises head body, has several spray orifices on it; Described spray orifice and the head body axis α that has angle is characterized in that, described spray orifice jet pipe is nearly straight-through shape, and nozzle exit and throat diameter do not wait, nozzle exit Mach number M=1.1～1.5.
The angle α of described spray orifice and head body axis is 10 °～14 °.
Advantage of the present utility model is, compared with the prior art,
(1) nozzle exit of the present utility model is slightly expanded, outlet Mach number M=1.1-1.5 (the traditional sprinkler heads Mach number is about 2), shower nozzle stagnation pressure 0.15-0.7Mpa (traditional sprinkler heads 0.8-0.9Mpa), effective to improving the decay of Oxygen Flow thigh, dephosphorization effect and shower nozzle life-span etc.
(2) shower nozzle is worked under low flow and still can be designed the oxygen nip normally, and striking energy (penetration depth) is low, and impact area is big, and dephosphorization of molten iron is effective, molten iron carbon content height behind the dephosphorization.
Description of drawings
Fig. 1 is the structural representation of existing oxygen lance blow head.
Fig. 2 is the A-A cross-sectional schematic of Fig. 1.
Fig. 3 is the structural representation of wooden utility model.
Fig. 4 is the B-B cross-sectional schematic of Fig. 3.
Embodiment
See also Fig. 3, Fig. 4, oxygen lance blow head of the present utility model comprises head body 1, has 4 spray orifices 2 on it; Described spray orifice 1 and the head body 1 axis α that has angle, described spray orifice 2 jet pipes 21 are nearly straight-through shape, jet pipe 21 outlets 212 do not wait with aditus laryngis 211 diameters, shower nozzle outer diameter D=300-450mm, spray orifice aditus laryngis 211 diameter of phi 1=20-65mm, spray orifice exports 212 diameter of phi 2=22-67mm, and spray orifice 2 becomes angle α=10-14 ° with head body 1 axis.
Oxygen lance blow head of the present utility model makes depresses (1.0-2.0Mpa), oxygen flow≤30000NM at works better oxygen
3During/h, the stagnation pressure 0.15-0.7Mpa of shower nozzle, shower nozzle nozzle exit Mach number M=1.1-1.5, in the converter dephosphorization process, the stable top rifle oxygen flow＜30000NM that keeps
3During/h state, the oxygen flow thigh has low striking energy (penetration depth is low) and big impact area, and its dephosphorization, to protect carbon effective.
Oxygen lance blow head dephosphorization of molten iron of the present utility model is effective, molten iron carbon content height behind the dephosphorization.Its result of use is as shown in table 1.(the converter dephosphorization hot metal ratio is 88-93%)
Table 1
| C | Si | Mn | P | S | Temperature ℃ | |
| Molten iron composition (%) before the dephosphorization | 4.5-4.8 | 0.25-0.35 | 0.25-0.3 5 | 0.08-0.1 | ＜0.01 | 1300-1370 |
| With molten iron composition (%) behind the conventional smelting in the 5 holes shower nozzle dephosphorization | ＜3.55 | ＜0.02 | 0.10-0.17 | ＜0.02 | 0.008 | 1300-1340 |
| With molten iron composition (%) behind the utility model shower nozzle dephosphorization | ＞3.75 | ＜0.02 | 0.12-0.20 | ＜0.015 | 0.008 | 1300-1340 |
In sum, shower nozzle of the present utility model is different from existing High Mach number shower nozzle, so that depress at normal operation oxygen, have good stream thigh characteristic and produce best dephosphorization effect, molten iron carbon reduces behind the dephosphorization, and the simultaneously cooling of shower nozzle is good, and arranged higher service life. Along with the continuous increase of low-phosphorous steel grade demand, dephosphorization of molten iron all the more obtains paying attention to. Therefore, oxygen gun sprayer promotion and application of the present utility model have a extensive future.
Claims (2)
1. Oxygen Lance Nozzle for Converter comprises head body, has several spray orifices on it; Described spray orifice and the head body axis α that has angle is characterized in that, described spray orifice jet pipe is nearly straight-through shape, and nozzle exit and throat diameter do not wait, nozzle exit Mach number M=1.1～1.5.
2. Oxygen Lance Nozzle for Converter as claimed in claim 1 is characterized in that, the angle α of described spray orifice and head body axis is 10 °～14 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03229929 CN2656428Y (en) | 2003-03-31 | 2003-03-31 | Oxygen gun spray head for converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03229929 CN2656428Y (en) | 2003-03-31 | 2003-03-31 | Oxygen gun spray head for converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2656428Y true CN2656428Y (en) | 2004-11-17 |
Family
ID=34326113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03229929 Expired - Lifetime CN2656428Y (en) | 2003-03-31 | 2003-03-31 | Oxygen gun spray head for converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2656428Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110129515A (en) * | 2019-07-02 | 2019-08-16 | 马鞍山钢铁股份有限公司 | A kind of oxygen rifle system stagnation pressure measuring device and method |
| CN111187873A (en) * | 2020-02-17 | 2020-05-22 | 本钢板材股份有限公司 | Molten steel smelting method of large converter |
-
2003
- 2003-03-31 CN CN 03229929 patent/CN2656428Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110129515A (en) * | 2019-07-02 | 2019-08-16 | 马鞍山钢铁股份有限公司 | A kind of oxygen rifle system stagnation pressure measuring device and method |
| CN111187873A (en) * | 2020-02-17 | 2020-05-22 | 本钢板材股份有限公司 | Molten steel smelting method of large converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130331 Granted publication date: 20041117 |