CN203923246U - A kind of oxygen lance blow head with concentrated a fluid stream - Google Patents
A kind of oxygen lance blow head with concentrated a fluid stream Download PDFInfo
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- CN203923246U CN203923246U CN201420285812.0U CN201420285812U CN203923246U CN 203923246 U CN203923246 U CN 203923246U CN 201420285812 U CN201420285812 U CN 201420285812U CN 203923246 U CN203923246 U CN 203923246U
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- oxygen lance
- oxygen
- nozzle
- concentrated
- blow head
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Abstract
There is an oxygen lance blow head for concentrated a fluid stream, belong to converter oxygen gun equipment technical field, for improving the index of converter top-blow oxygen steelmaking.Its technical scheme is: its 4 nozzle of oxygen lance are uniformly distributed around shower nozzle end face center, and distribution circular diameter is 140-150mm, and spray nozzle angle is 11.5 °-13.5 °.The utility model has changed nozzle of oxygen lance distribution circular diameter and nozzle of oxygen lance angle, obtain more concentrated oxygen jet, the total area of dissipation in impact zone of 4 a fluid streams composition is little, reflecting point is concentrated, have enter fast the C-O reaction period, coal-gas recovering amount is large, the remaining manganese of molten steel is high, lining erosion equilibrium, iron and steel stock are consumed to the advantages such as low, simultaneously because a fluid stream is concentrated, in its rifle position of converting process, more conventional oxygen rifle is high, away from reaction zone, greatly reduce shower nozzle and corrode or the risk of scaling loss, extended shower nozzle work-ing life.
Description
Technical field
The utility model relates to the oxygen lance blow head in a kind of oxygen supply equipment of oxygen top blown converter steel making, belongs to converter oxygen gun equipment technical field.
Background technology
In oxygen top blown converter steel making, oxygen lance blow head is the key link that forms oxygen rifle, during bessemerizing, the oxygen jet that oxygen lance blow head produces not only participates in the redox reaction between slag-steel in molten bath, melting bath stirring power is also provided, thermodynamics of reactions in molten bath and dynamic conditions are had to material impact.Whether sprinkler design theory and parameter be reasonable, causes metallurgical effect to differ greatly, and not only directly affects the every economic and technical norms of converter, also affects the work-ing life of oxygen lance blow head.
The design concept of conventional 4 hole oxygen lance blow heads is more emphasized impact area and is changed slag effect, thereby the distribution circle of 4 spray orifices of one side is larger, angle between spray orifices is also larger on the other hand, the feature of such oxygen lance blow head is rapid for changing slag, in slag, FeO content is relatively high, can keep good dephosphorization effect, but the following drawback of bringing also can not be ignored:
(1) 4 a fluid stream shock point disperses, although oxygen supply area is larger, but run into and smelt that low-temperature molten iron or steel scrap amount are large, bath temperature is when lower, big area oxygen blast causes and heats up slowly, can not improve rapidly bath temperature, thereby the speed that enters the C-O reaction period is slow, easily make FeO in pre-slag gather, cause early stage flow black slag even splash be difficult to suppress.
(2) initial smelting period bath temperature is lower, heats up slow, enters C-O evening time reaction period, and the low levels coal gas that during this, reaction generates is forced to diffuse in atmosphere, and not only coal-gas recovering amount is little, and resource recycling rate is low, and causes CO to pollute.
(3) in slag, FeO is more, causes molten steel oxidation strong, and remaining Mn is low for molten steel terminal, and in steel, O content is high, causes alloy material consumption higher.
(4) disperse because impacting a fluid stream, molten steel is heavier to washing away of furnace wall and furnace wall and furnace bottom seaming position after stirred by a fluid stream, and stove labour later stage furnace retaining task is more heavy, causes high, economic furnace life of converter refractory consumption low.
(5) impact a fluid stream and disperse to cause under normal operating condition, oxygen lance blow head is lower apart from bath surface, and shower nozzle is corroded by high-temperature molten steel more easily, the shower nozzle life-span is influenced, while carrying out in addition the operation of terminal pressure rifle, the residing working conditions of shower nozzle is more severe, causes the shower nozzle life-span generally lower.
(6), FeO is more in slag, and be difficult to suppress FeO content in slag by operation merely, cause iron and steel stock consumption higher.
Coherent oxygen lance is a kind of new oxygen rifle, the principle of coherent oxygen lance is around traditional oxygen lance blow head, to increase outer layer ring around following stream, make center supersonic jet expansion and decay less, supersonic jet is longer, improve penetration depth and the stirring intensity of oxygen jet to molten bath, because jet speed decay delays, can improve the blowing rifle position of oxygen rifle, and not affect the impact depth of jet to molten steel simultaneously.At present, the mentality of designing that reduces jet decay based on coherent oxygen lance plays a good role to the development of oxygen rifle, inspires technician to widen thoughts, the oxygen lance blow head that development makes new advances.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of oxygen lance blow head with concentrated a fluid stream, this oxygen lance blow head has higher bath temperature in a fluid stream impact zone, special when molten iron temperature is low or steel scrap amount is large, this oxygen lance blow head has that splash rate is low, iron and steel stock consume low, the shower nozzle life-span long, high, the coal gas recovery rate advantages of higher of manganese more than endpoint molten steel.
The technical scheme solving the problems of the technologies described above is:
A kind of oxygen lance blow head with concentrated a fluid stream, its structure comprises outer welded tube, middle welded tube, interior welded tube, shower nozzle end face and nozzle of oxygen lance, between middle welded tube and interior welded tube, it is water coolant input channel, between outer welded tube and middle welded tube, it is water coolant output channel, be uniformly distributed 4 nozzle of oxygen lance around shower nozzle end face center, its improvements are that nozzle of oxygen lance distribution circular diameter is 140-150mm, 11.5 °-13.5 ° of nozzle of oxygen lance angles.
Above-mentioned oxygen lance blow head, the throat diameter of spray orifice is controlled at 38-39mm, and exit diameter is controlled at 48-55mm.
The beneficial effects of the utility model are:
The utility model has utilized the theory of micro-boundling, by shortening spray orifice distribution circular diameter, optimizing the parameters such as nozzle of oxygen lance angle, has obtained significant result of use, and through nearly 100,000 stove production practice, superiority of the present utility model fully demonstrates aspect following:
(1) aspect suppressing splash in early stage and flowing black slag: do not occur flowing early stage the situation of black slag and splash, even in the time smelting lower than the low-temperature molten iron of 1250 DEG C, because temperature loss in reaction zone is little, heat up very fast, blowing steadily, solved conventional oxygen lance blow head and flowed black slag and the serious difficult problem of splash early stage in the time smelting low-temperature molten iron, raw material adaptive faculty improves greatly.
(2) aspect coal-gas recovering amount: use and concentrate a fluid stream oxygen lance blow head to enter as early as possible the C-O reaction period, can reach coal-gas recovering standard in blowing 1min20s to 2min left and right, the coal-gas recovering time shifts to an earlier date greatly, and under normal blowing condition, coal-gas recovering amount remains on 150Nm
3/ t left and right, can reach 160Nm when yield is larger
3/ t, occupy domestically leading level.
(3), improve the remaining Mn of molten steel terminal aspect: use after the utility model oxygen lance blow head, a little less than molten steel oxidation, remaining Mn is high for molten steel terminal, generally remain on 0.13% left and right, in molten iron, the Mn rate of recovery remains on 40%-50% level, the enterprise that uses conventional oxygen lance blow head apparently higher than other, economizes the about 1kg/t of alloy material than the conventional oxygen lance blow head more piece of use.
(4) lining erosion aspect: in impingement flow constriction, the stirring region of molten steel is away from furnace wall and furnace wall and furnace bottom seaming position, lighter to washing away of furnace lining, obtain desirable " U " type furnace bottom, through the production practice of 5 stove labour, economic furnace life all remains on 20000 stove left and right, and lining erosion equilibrium particularly never occurred that the furnace bottom shaft seam crossing that conventional oxygen rifle is easily shown in corroded.
(5) improving aspect rifle age: oxygen lance blow head angle is little, in impingement flow constriction, Oxygen Flow beam attenuation is little, thereby under than the higher rifle position of conventional oxygen rifle, can obtain equal impact depth, oxygen lance blow head is farther apart from bath surface, shower nozzle, away from reaction zone, has reduced high-temperature molten steel erosion, more than the shower nozzle life-span generally remains on 350 stoves under normal circumstances.
(6) iron and steel stock consumption aspect: in Oxygen Flow constriction, under normal rifle position, to be reduced chance many for O in the molten bath in, and in slag, FeO content is lower, and a little less than molten steel oxidation, converter operation iron and steel stock consumes about 1048kg/t, occupy top standard.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is that the A of Fig. 1 is to view.
In figure, mark is as follows: shower nozzle end face 1, outer welded tube 2, middle welded tube 3, interior welded tube 4, sealing rubber ring 5, nozzle of oxygen lance 6.
Embodiment
The principle of coherent oxygen lance is to increase outer layer ring around following stream around traditional oxygen rifle, make center supersonic jet expansion and decay less, supersonic jet is longer, improve penetration depth and the stirring intensity of oxygen jet to molten bath, simultaneously because jet speed decay delays, can improve the blowing rifle position of oxygen rifle, and not affect the impact depth of jet to molten steel.This oxygen lance blow head reduces the mentality of designing of jet decay with reference to coherent oxygen lance, but do not adopt outer layer ring around the mode of following stream, but realize the object that reduces oxygen jet decay by the oxygen a fluid stream of more concentrating than conventional oxygen rifle, reach the effect of micro-boundling.Utilize the oxygen lance blow head of micro-boundling theory design, take 4 spray orifice distribution circular diameters to shorten to the design of 140-150mm, can improve rapidly oxygen rifle impact zone temperature of reaction, compared with conventional oxygen lance blow head, more be conducive to molten bath local temperature and heat up and enter the C-O reaction period rapidly, avoid flowing black slag or splash because C-O response lag causes Primary period.
In figure, show, the oxygen lance blow head structure of the utility model and prior art is basic identical, and it is made up of shower nozzle end face 1, outer welded tube 2, middle welded tube 3, interior welded tube 4, sealing rubber ring 5, nozzle of oxygen lance 6.Wherein, between middle welded tube 3 and interior welded tube 4 for inputting water coolant, between outer welded tube 2 and middle welded tube 3 for exporting water coolant, interior welded tube 3 inside are used for transmitting oxygen or nitrogen, then the nozzle of oxygen lance 6 of flowing through, formation has certain pressure and kinetic energy high-speed gas jet, and the nozzle of oxygen lance 6 of 4 Lavals is uniformly distributed on shower nozzle end face 1.
In figure, show, nozzle of oxygen lance 6 distribution circular diameters are 140-150mm, and nozzle of oxygen lance angle is 11.5 °-13.5 °, and the throat diameter of nozzle of oxygen lance 6 is 38-39mm, exit diameter 48-55mm.
An embodiment of the present utility model is as follows:
Supporting with 120t converter, nozzle of oxygen lance 6 distribution circular diameters are 145mm, and nozzle of oxygen lance angle is 12.5 °, and the throat diameter of nozzle of oxygen lance 6 is 38.8mm, exit diameter 50mm.
Use procedure of the present utility model:
Gas is inner by 4 nozzle of oxygen lance 6 uniform directive molten steel molten baths by managing 3 in interior weldering, because nozzle of oxygen lance 6 angles are little and distribution circular diameter dwindles, the total area of dissipation in impact zone of more concentrated 4 a fluid streams composition is little, reflecting point is concentrated, therefore in impact zone, the more conventional oxygen lance spraying of temperature is high first watch, have the C-O of the entering reaction period early, large, the remaining manganese height of molten steel of coal-gas recovering amount etc. advantage.Concentrate because of a fluid stream, in its rifle position of converting process, more conventional oxygen rifle is high, away from reaction zone, has improved shower nozzle working conditions simultaneously, has reduced shower nozzle and has corroded scaling loss risk, has therefore extended shower nozzle work-ing life.
Claims (2)
1. one kind has the oxygen lance blow head of concentrated a fluid stream, its structure comprises outer shower nozzle end face (1), outer welded tube (2), middle welded tube (3), interior welded tube (4) and nozzle of oxygen lance (6), between middle welded tube (3) and interior welded tube (4), it is water coolant input channel, between outer welded tube (2) and middle welded tube (3), it is water coolant output channel, be uniformly distributed 4 nozzle of oxygen lance (6) around shower nozzle end face (1) center, it is characterized in that: nozzle of oxygen lance (6) distribution circular diameter is 140-150mm, spray nozzle angle is 11.5 °-13.5 °.
2. the oxygen lance blow head with concentrated a fluid stream according to claim 1, is characterized in that: the throat diameter of described nozzle of oxygen lance (6) is 38-39mm, and exit diameter is 48-55mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420285812.0U CN203923246U (en) | 2014-05-30 | 2014-05-30 | A kind of oxygen lance blow head with concentrated a fluid stream |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420285812.0U CN203923246U (en) | 2014-05-30 | 2014-05-30 | A kind of oxygen lance blow head with concentrated a fluid stream |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203923246U true CN203923246U (en) | 2014-11-05 |
Family
ID=51819101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420285812.0U Withdrawn - After Issue CN203923246U (en) | 2014-05-30 | 2014-05-30 | A kind of oxygen lance blow head with concentrated a fluid stream |
Country Status (1)
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| CN (1) | CN203923246U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993127A (en) * | 2014-05-30 | 2014-08-20 | 河北唐银钢铁有限公司 | Oxygen lance nozzle with concentrated streams |
-
2014
- 2014-05-30 CN CN201420285812.0U patent/CN203923246U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993127A (en) * | 2014-05-30 | 2014-08-20 | 河北唐银钢铁有限公司 | Oxygen lance nozzle with concentrated streams |
| CN103993127B (en) * | 2014-05-30 | 2016-03-30 | 河北唐银钢铁有限公司 | A kind of oxygen lance blow head with concentrated a fluid stream |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141105 Effective date of abandoning: 20160330 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |