CN2892879Y - Molten iron desulfurizing magnesium agent spray gun - Google Patents
Molten iron desulfurizing magnesium agent spray gun Download PDFInfo
- Publication number
- CN2892879Y CN2892879Y CN 200620099955 CN200620099955U CN2892879Y CN 2892879 Y CN2892879 Y CN 2892879Y CN 200620099955 CN200620099955 CN 200620099955 CN 200620099955 U CN200620099955 U CN 200620099955U CN 2892879 Y CN2892879 Y CN 2892879Y
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- Prior art keywords
- molten iron
- passage
- nozzle
- agent spraying
- channel
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- Expired - Fee Related
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The utility model pertains to the field of black metallurgical, specifically speaking, relates to a molten iron desulphurization-magnesium agent spray gun for out-of-furnace treatment of molten iron in hot metal ladle. The utility model is characterized in that the utility model comprises a gun body (6), a frame (1), a fire-resistant lining matching with the external of the frame (1) and a channel (3) matching with the frame (1). A curved-shaped structure is used for the outlet of the channel (3). A detachable structure is used for the outlet of the channel (3), and the channel (3) is sealed and connected with a nozzle (4) of the end of the channel. Difficult fluxing thermal strong material is used for the nozzle (4). The nozzle (4) is matched and connected with the channel (3) through threads. The curved angle Alpha of the outlet of the channel (3) is 30-50 degrees, and the curved radius r is greater than or equal to 100mm. A fire-resistant lining (5) is matched with the external of the nozzle (4). The utility model can guarantee the magnesium particles (without additive) steadily enter the molten iron, and guarantee greater index for the desulphurization of the hot metal ladle.
Description
Technical field
The utility model belongs to the ferrous metallurgy category, is specifically related in hot metal ladle molten iron be carried out the molten iron desulfurizing and demagging agent spraying gun of processing outside the stove.
Background technology
Known is the spray gun device that desulfurizing iron is used with magnesium, or is provided with vaporizing chamber in the exit of submerged type spray gun passage, though or stillization chamber, must mix the magnesium powder mutually with the additive (lime, carbide of calcium, rhombspar etc.) that plays passivation.Above-mentioned known devices has its inherent shortcoming, and big such as the material consumption, sorbent utilization is low, the complicated heaviness of spray gun and mechanical means etc., and this just must cause process complications, the desulphurization cost height.These shortcomings often cause successfully carrying out secondary desulfurization, and are especially all the more so under large-scale hot metal ladle (more than the 160t) situation.
Known molten iron desulfuring spray gun is made of skeleton, refractory lining, passage and vaporizing chamber.This spray gun can gratifyingly carry out desulfurization in 70～90t hot metal ladle.If in bigger (more than the 160t) hot metal ladle, promptly when spray gun slips into the molten iron degree of depth greater than 2m, the spray gun vaporizing chamber can not have been finished the basic function that makes magnesium vaporization, because (suitable with the parameter of handling molten iron in large-scale hot metal ladle) magnesium is in a liquid state when pressure is higher than 0.4Mpa and temperature and is lower than 1300 ℃.Exist if any vaporizing chamber this moment, then can make the distribution situation variation of magnesium in whole iron bath, thereby the utilization ratio index of magnesium is produced adverse influence.Under this condition, the spray gun that adopts stillization chamber then is rational.
Yet when adopting the spray gun of stillization chamber, if the export pipeline of interior passageway is vertical, and passage usually takes place and stops up when big (more than the 2m) in the importing degree of depth of seed particulate magnesium material.This is because channel outlet molten iron bubbling generation on every side surging force makes channel outlet patted by molten iron on every side, and then causes passage to be stopped up by iron and magnesium.
The utility model content
The utility model is intended to solve the deficiencies in the prior art part and provides a kind of and magnesium grain (not being with additive) stably can be imported in the molten iron, and guarantee that molten iron is surrounded by very high desulfurization performance index, reduce the service load of device structure element, simplify the service procedure of spray gun, reduce the molten iron desulfurizing and demagging agent spraying gun of initial cost and working cost.
Technical solution of the present utility model can realize according to following mode:
Molten iron desulfurizing and demagging agent spraying gun, it comprises: gun body, skeleton, the passage that is assigned in the refractory lining of skeleton outside, connects with described skeleton; Warp architecture is adopted in the exit of described passage.
The exit of passage described in the utility model is dismantled and assembled structure, its port nozzle and described passage sealing-in.Nozzle described in the utility model can adopt infusibility strong material hot in nature (refractory alloy, such as titanium alloy or other metal-nonmetallic composite etc.).
As a kind of preferred version, nozzle described in the utility model can connect with passage threadably.
As another kind of preferred version, the bent angle alpha of channel exit described in the utility model is 30～50 °, bending radius r 〉=100mm.
The utility model can be furnished with refractory sleeve in the outside of described nozzle.For improving fire performance, refractory sleeve can be selected graphite, can adopt that also boron nitride, match are swelled etc.
The length of refractory sleeve described in the utility model is 4～10 times of the interior electrical path length of passage.
The utility model compared with prior art, its major technique effect is:
The utility model is jetted the seed shape magnesia mixture that does not add passivator aggregate (it can make the in-process metrics variation, make equipment complicated) in the molten iron melt had guarantee.Meanwhile, adopt the spray gun of this new texture can guarantee that the iron bath bubbling steadily and evenly, reduced the service load that the device structure element is subjected to, simplified the service procedure of spray gun, initial cost and working cost have been reduced, the molten iron that has guaranteed hot metal ladle is filled rate and is reached 95～97%, and sorbent utilization is more than 90%.
Compare with existing spray gun, one section passage of spray gun outlet of the present utility model adopts removable nozzle-like, receive on the crooked main channel by means of being threaded, the main channel is 30～50 ° to the angle of bend of spray gun longitudinal center line, and the channel bends radius then is not less than 100mm.Removable nozzle adopts the strong material (such as titanium alloy) of infusible heat to make, and is equipped with one and does not invade the removable sleeve pipe that the refractory materials (such as graphite) of profit is made with molten iron, and casing length is 4～10 times of passage internal diameter.
The utility model has guaranteed that magnesium grain (not being with additive) can stably enter in the molten iron, and has guaranteed that the hot metal ladle desulfurization has very high technical indicator, that is:
---the utilization ratio height of magnesium;
---the magnesia mixture unit consumption is low;
---iron loss is few during processing;
---hot metal temperature drop is little;
---the molten iron treatment time is short;
---result is stable and reliable;
---working cost is few.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is an one-piece construction synoptic diagram of the present utility model.
Embodiment
One section passage in the utility model spray gun exit becomes removable form of nozzle, and the mode that employing is threaded couples together with the main channel of bending, and the main channel is 40 ° to the angle of bend of spray gun longitudinal center line, and bending radius is 110mm.Removable nozzle is made with infusibility strong material hot in nature (such as titanium alloy), and nozzle assembles a removable sleeve pipe again, overlaps the effective refractory materials that is not soaked into by molten iron (such as graphite) and makes, and simultaneously, telescopic length is 8 times of the interior electrical path length of passage.
As shown in Figure 1, the utility model molten iron desulfurizing and demagging agent spraying gun comprises: gun body 6, skeleton 1, the passage 3 that is assigned in the refractory lining 2 of skeleton 1 outside, connects with described skeleton 1; Warp architecture is adopted in the exit of described passage 3.The exit of described passage 3 is dismantled and assembled structure, its port nozzle 4 and described passage 3 sealing-ins.Described nozzle 4 adopts infusibility strong material titanium alloy hot in nature.Described nozzle 4 connects with passage 3 threadably.The bent angle alpha in the exit of described passage 3 is 40 °, bending radius r=110mm.Is furnished with refractory sleeve 5 in the outside of described nozzle 4.Refractory sleeve 5 is a graphite.The length of described refractory sleeve 5 is 8 times of passage 3 interior electrical path length.
The mode of operation of the utility model molten iron desulfurizing and demagging agent spraying gun is pressed following realization:
The spray gun dive enters molten iron to the necessary degree of depth.Open material feeder, seed magnesium is sent into spray gun passage 3, deliver in the molten iron by exchangeable nozzle 4 then by injection system.Stop to blow after spraying into essential dosage, spray gun is lifted from melt, close carrier gas.
For stable the sending in the molten iron of magnesium grain, must guarantee that section (being the least significant end of passage) has reliable conveying endways, because reaching the surging force that causes thus, the molten iron bubbling can cause molten iron to be splashed into channel end.The crooked certain angle of the 3 pairs of spray gun longitudinal center line of passage can make carrier and magnesium steam in the treating processes leave the outlet of passage 3, and promptly the molten iron bubbling area is to the other skew of the side of spray gun.
Laboratory study and practice all show:, then to no effect very little as the bent angle of 3 pairs of spray gun longitudinal center line of passage because the molten iron bubbling area departs from spray gun less than 30 °, so passage 3 still may be blocked; And when bent angle greater than 50 ° and bending radius during less than 100mm, this section passage then produces big resistance, carrier and magnesium steam are contained, have at the carrier flow under the situation of certain limit (flux values is definite according to blowing desulfurization agent intensity), be not enough to again guarantee that channel exit has enough pressure.
Facts have proved, spray gun in use, but be in the molten iron contact condition in the scorification of channel outlet local heating, spray gun exit passage is deformed, this is unfavorable for the magnesium grain is jetted in molten iron.The one section passage in spray gun exit is become the exchangeable nozzle of linearity, receive on the spray gun passage, so just can change nozzle fast and needn't change the spray gun of whole passage or whole Zhi Anggui with thread connecting mode.Adopt the strong material of infusibility heat to make exchangeable nozzle, but the work-ing life of significant prolongation nozzle, and the while has also been improved the reliability of winding-up magnesium grain.
The sleeve pipe that the refractory materials that usefulness of exchangeable nozzle assembling is not soaked into by molten iron is made has guaranteed that nozzle does not contact molten iron, makes magnesia mixture in sending into the process of molten iron, and the porthole can keep stable geometrical shape.Also fast changeable new casing when refractory sleeve is worn need not be changed valuable spray gun.Casing length is 8 times of passage internal diameter, and casing length is not enough to guarantee that nozzle does not contact molten iron during less than 4 times of passage internal diameters; And casing length is then changed difficulty during greater than 10 times of passage internal diameters, thereby also unreasonable.
Protection domain of the present utility model will not only be confined to above-mentioned embodiment, and any defeated magnesium channels designs with molten iron desulfurizing and demagging agent spraying gun becomes forniciform structure formation to regard as to fall within the protection domain of the present utility model.
Claims (10)
1, molten iron desulfurizing and demagging agent spraying gun is characterized in that, comprising: gun body (6), skeleton (1), the passage (3) that is assigned in the outside refractory lining (2) of skeleton (1), connects with described skeleton (1); Warp architecture is adopted in the exit of described passage (3).
2, molten iron desulfurizing and demagging agent spraying gun according to claim 1 is characterized in that: the exit of described passage (3) is dismantled and assembled structure, its port nozzle (4) and described passage (3) sealing-in.
3, molten iron desulfurizing and demagging agent spraying gun according to claim 2 is characterized in that: described nozzle (4) adopts infusibility strong material hot in nature.
4, according to claim 2 or 3 described molten iron desulfurizing and demagging agent spraying guns, it is characterized in that: described nozzle (4) connects with passage (3) threadably.
5, according to claim 2 or 3 described molten iron desulfurizing and demagging agent spraying guns, it is characterized in that: the bent angle alpha in described passage (3) exit is 30～50 °, bending radius r 〉=100mm.
6, according to claim 2 or 3 described molten iron desulfurizing and demagging agent spraying guns, it is characterized in that: be furnished with refractory sleeve (5) in the outside of described nozzle (4).
7, molten iron desulfurizing and demagging agent spraying gun according to claim 6 is characterized in that: refractory sleeve (5) can adopt graphite, boron nitride or match grand.
8, molten iron desulfurizing and demagging agent spraying gun according to claim 6 is characterized in that: the length of described refractory sleeve (5) is 4～10 times of the interior electrical path length of passage (3).
9, molten iron desulfurizing and demagging agent spraying gun according to claim 3 is characterized in that: described nozzle (4) adopts titanium alloy.
10, molten iron desulfurizing and demagging agent spraying gun according to claim 5 is characterized in that: be furnished with refractory sleeve (5) in the outside of described nozzle (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620099955 CN2892879Y (en) | 2006-03-29 | 2006-03-29 | Molten iron desulfurizing magnesium agent spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620099955 CN2892879Y (en) | 2006-03-29 | 2006-03-29 | Molten iron desulfurizing magnesium agent spray gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2892879Y true CN2892879Y (en) | 2007-04-25 |
Family
ID=38061046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620099955 Expired - Fee Related CN2892879Y (en) | 2006-03-29 | 2006-03-29 | Molten iron desulfurizing magnesium agent spray gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2892879Y (en) |
-
2006
- 2006-03-29 CN CN 200620099955 patent/CN2892879Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yingkou Dongbang Metallurgical Refractory Co., Ltd. Assignor: Liu Dongye Contract fulfillment period: 2007.4.25 to 2012.4.25 Contract record no.: 2008210000054 Denomination of utility model: Molten iron desulfurizing and demagging agent spraying gun Granted publication date: 20070425 License type: Exclusive license Record date: 20081105 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.4.25 TO 2012.4.25; CHANGE OF CONTRACT Name of requester: YINGKOU DONGBANG METALLURGY EQUIPMENT REFRACTORIES Effective date: 20081105 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070425 Termination date: 20140329 |