CN201165534Y - Granule magnesium molten iron desulfuring spray gun - Google Patents
Granule magnesium molten iron desulfuring spray gun Download PDFInfo
- Publication number
- CN201165534Y CN201165534Y CNU2007201853990U CN200720185399U CN201165534Y CN 201165534 Y CN201165534 Y CN 201165534Y CN U2007201853990 U CNU2007201853990 U CN U2007201853990U CN 200720185399 U CN200720185399 U CN 200720185399U CN 201165534 Y CN201165534 Y CN 201165534Y
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- Prior art keywords
- spray gun
- molten iron
- passage
- nozzle
- magnesium molten
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The utility model relates to a magnesium particle hot metal desulphurizing spray gun, which belongs to the ferrous metallurgy field in which external desulphurization treatment is performed to the hot metal in the hot metal ladle. The spray gun comprises a gun body, and a skeleton (1) of a refractory lining (2), a channel (3) positioned in the gun body and provided with end part in a curved state, and a spraying nozzle (5); the material feeding opening of the spraying nozzle (5) is connected with the material discharging opening of the channel (3) through a threaded connector (4) in a matching way; a thrust mechanism (6) is fixed on the outer wall of the spraying nozzle (5) in a matching way; the working end of the thrust mechanism (6) is connected with the threaded connector (4) in a matching way; the bending angle of the central axle line of the material discharging opening of the channel (3) to the longitudinal axle of the spray gun is alpha, and alpha is larger than and equal to 30 degrees and smaller than and equal to 50 degrees. The spray gun has the advantages that the running cost can be reduced, the filling rate if the hot metal ladle can reach 95 to 97 percent, and the magnesium absorption rate is up to 90 percent.
Description
Technical field
The utility model belongs to the ferrous metallurgy field, promptly in hot metal ladle molten iron is carried out the secondary desulfurization process field, relates in particular to a kind of granule magnesium molten iron desulfuring spray gun.
Background technology
Known is the spray gun structure that desulfurizing iron is used with magnesium, have at submerged type rifle body exit band vaporizing chamber, stillization that has chamber, but adopt the mixture of pulverous magnesium and passivation addition material (lime, carbide of calcium, rhombspar etc.).This class device all has some inherent shortcomings, and big such as the material consumption, magnesium absorption rate is low, the complicated heaviness of mechanical means and gun body etc., and its consequence is to make process complications, the desulphurization cost height.The spray gun of band vaporizing chamber can success independent employing particulate state magnesium (not with addition material) be not desulfurizing iron in the vehicle-mounted hot metal ladle of very big (70～90t molten iron) at capacity.But when surpassing 2m (spray gun slip into the degree of depth) spray gun vaporizing chamber has just no longer been fulfiled the main function that oneself makes the magnesium vaporization when adopting large vol hot metal ladle (more than the 160t molten iron) desulfurization because be higher than 0.4Mpa at pressure, (parameter when this is equivalent to large vol hot metal ladle processing molten iron) magnesium presented liquid state when molten iron temperature was lower than 1300 ℃.Thereby can hinder magnesium whole metal pool scope in distribute, influence the specific absorption of magnesium if any vaporizing chamber this moment.Under this condition, must adopt the spray gun of stillization chamber.
The spray gun of using when getting known large vol ladle desulfurisation is as prototype.
The outlet that the passage of this spray gun enters metal pool is vertical.Be equipped with removable refractory sleeve in the exit, its protection spray gun passage steel pipe does not contact it with molten iron.
Removable refractory sleeve forms a passage in the spray gun exit, it is standing the erosive wear of magnesium grain, therefore cross " crater " that just formed a taper in 30～50 minutes, the speed of two-phase materials flow descends in " crater " to some extent, causes into spray gun channel outlet and passage is stopped up of molten iron.Must be noted that when the spray gun channel outlet is vertical state that the two phase flow of bubble shape is penetrated at the access incisions place and promptly turned back upwards, " cave " that forms in melt helps that molten iron is surging to be advanced to spatter, and molten iron is very near apart from channel outlet, causes that the two contacts often.Even can cause flow velocity slack-off the stopping of moment of two phase flow during contact, this just is easy to cause the obstruction of passage.
The utility model content
The utility model is intended to overcome the deficiencies in the prior art part and provides a kind of and guarantee the stable granule magnesium molten iron desulfuring spray gun of granular magnesia mixture being sent into molten iron and guaranteeing the high excellent index of ladle desulfurisation by means of gaseous media.
For achieving the above object, the utility model is achieved in that
Granule magnesium molten iron desulfuring spray gun comprises gun body, and described gun body comprises the skeleton of being furnished with refractory lining, place in the gun body and the end is the passage and the nozzle of case of bending; The feeding mouth of described nozzle and the discharge port of passage connect.
As a kind of preferred version, the utility model is furnished with threaded connector at the discharge port of described passage; The feeding mouth of described nozzle connects through the discharge port of threaded connector and passage.
As another kind of preferred version, the utility model can fixedly be furnished with thrust mechanism on the outer wall of described nozzle; The working end and the threaded connector of described thrust mechanism connect.
The axis of the discharge port of passage described in the utility model is to the 30 °≤α of angle of bend of the spray gun longitudinal axis≤50 °.
The bending radius of passage discharge port described in the utility model is not less than 100mm.
In addition, nozzle described in the utility model is outer can be furnished with refractory sleeve.
The one section passage in the utility model spray gun exit is made replaceable nozzle shape, couples together with the passage of a threaded connector and a bending, simultaneously, installs and fix a thrust pad on removable nozzle.Passage is 30～50 ° to the angle of bend of the spray gun longitudinal axis, and the bending radius of passage then is not less than 100mm.
The utility model can guarantee that stabilized uniform imports molten iron to particle magnesium material, makes the maintenance and repair operation of the spray gun simple and fast that becomes, and reduces working cost, guarantees that hot metal ladle filling rate reaches 95～97%, and magnesium absorption rate is more than 90%.
Description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.Protection domain of the present utility model will not only be confined to the statement of following content.
Fig. 1 is the longitudinal diagram of the utility model spray gun substructure.
Embodiment
As shown in the figure, granule magnesium molten iron desulfuring spray gun comprises gun body, and described gun body comprises the skeleton 1 of being furnished with refractory lining 2, place in the gun body and the end is the passage 3 and the nozzle 5 of case of bending; The discharge port of the feeding mouth of described nozzle 5 and passage 3 connects.Is furnished with threaded connector 4 at the discharge port of described passage 3; The feeding mouth of described nozzle 5 connects through the discharge port of threaded connector 4 with passage 3; On the outer wall of described nozzle 5, fixedly is furnished with thrust mechanism 6; The working end of described thrust mechanism 6 and threaded connector 4 connect; The axis of the discharge port of described passage 3 is to the 30 °≤α of angle of bend of the spray gun longitudinal axis≤50 °; The bending radius of described passage 3 discharge ports is not less than 100mm.Is furnished with refractory sleeve 7 outside the described nozzle 5.
The utility model spray gun comprises a skeleton 1, is furnished with refractory lining 2 on the skeleton 1, and refractory lining 2 can adopt the refractory concrete material; There is bending channel 3 spray gun inside, and replaceable nozzle 5 usefulness threaded connectors 4 are received on the bending channel 3.Be fixed with thrust mechanism 6 on replaceable nozzle 5, thrust mechanism 6 can adopt thrust pad.Replaceable nozzle 5 outsides are protected with removable refractory sleeve 7.
The mode of operation of the application's device is as follows: open the carrier gas steam supply valve, spray gun is slipped into molten iron to the necessary degree of depth.Connect material feeder (not shown on the figure), particulate magnesium is sent into spray gun passage 3 by injection system (not shown on the figure), enters in the molten iron by nozzle 5 then.After spraying into the sweetening agent of aequum, stop material spray, carry rifle and stop supplying carrier gas.
The essence of application device is as follows:
The one section passage in spray gun exit becomes removable nozzle form and by threaded connector itself and passage is connected together, and on the replaceable nozzle thrust pad is arranged, and makes nozzle and refractory sleeve that quick-detach soon weares and teares and install new.The dismounting update mode of nozzle and refractory sleeve is as follows: squeeze into a conic mandrel bar that rib is arranged with handles in the passage of wearing and tearing, nozzle is screwed from the main channel, the Thurst washer that is fixed on the nozzle ejects refractory sleeve then from the rifle lining.Be screwed into new nozzle in bending channel, insert new refractory sleeve, the gap between sleeve pipe and rifle lining is stopped up with refractory mortar with repairing.
So, when repairing, just needn't tear lower gun body and the whole passage pipe of replacing open.Repairing spray gun can carry out at station, only takies 5～10 minutes, and desulfurizing iron is not constituted influence working cycle.
Passage bends an angle to the spray gun longitudinal center line, and the bubble that can make carrier gas and the formation of magnesium steam in handling the molten iron process is away from outlet.These bubbles are in the other come-up of side, lessly contact with the spray gun channel end, that is to say that the molten iron bubbling area shifts to by the channel outlet side, and this makes time and frequency minimizing that channel outlet contacts with molten iron.This situation has been presented as replaceable nozzle and replaceable refractory sleeve life-time dilatation, has also reduced the probability that the spray gun passage stops up simultaneously.
Laboratory study and practice all show, passage is poor effect during less than 30 ° to the angle of bend of spray gun longitudinal center line because in the case the molten iron bubbling area to remove the distance of porthole too little, thereby still may blocking channel.And when bent angle greater than 50 ° and bending radius during less than 100mm, then the resistance of this section passage is very big, two phase flow there is " checking " effect, (the carrier gas stream value is to determine according to the fierce degree of sweetening agent importing process) can not guarantee to have the necessary ram pressure of the discharge zone of overcoming resistance in channel outlet under the limited situation of carrier gas flux.Spray gun passage maximum deflection radius is subjected to the restriction of spray gun radius, and the latter is generally 300～400mm.Therefore, to be increased to more than the 100mm be impossible to spray gun channel bends radius.
The above as can be seen, the application's spray gun guarantees reliable and stable particulate magnesium being sent in the melt of large vol hot metal ladle, guarantees that the molten iron bubbling is even in the molten bath, accelerates and the maintenance and repair of simplification spray gun.Guarantee also that simultaneously the dressing rate reaches 95～97% in the bag, the specific absorption of magnesium is more than 90%, thereby solved the problem that proposes, and reached the expection technique effect.
Claims (7)
1, a kind of granule magnesium molten iron desulfuring spray gun comprises gun body, it is characterized in that: described gun body comprise be furnished with refractory lining (2) skeleton (1), place in the gun body and the end is the passage (3) and the nozzle (5) of case of bending; The discharge port of the feeding mouth of described nozzle (5) and passage (3) connects.
2, a kind of granule magnesium molten iron desulfuring spray gun according to claim 1 is characterized in that: be furnished with threaded connector (4) at the discharge port of described passage (3); The feeding mouth of described nozzle (5) connects through the discharge port of threaded connector (4) with passage (3).
3, a kind of granule magnesium molten iron desulfuring spray gun according to claim 2 is characterized in that: fixedly be furnished with thrust mechanism (6) on the outer wall of described nozzle (5); The working end of described thrust mechanism (6) and threaded connector (4) connect.
4, according to arbitrary described a kind of granule magnesium molten iron desulfuring spray gun of claim 1～3, it is characterized in that: the axis of the discharge port of described passage (3) is to the 30 °≤α of angle of bend of the spray gun longitudinal axis≤50 °.
5, a kind of granule magnesium molten iron desulfuring spray gun according to claim 4 is characterized in that: the bending radius of described passage (3) discharge port is not less than 100mm.
6, according to arbitrary described a kind of granule magnesium molten iron desulfuring spray gun of claim 1～3, it is characterized in that: be furnished with refractory sleeve (7) outside the described nozzle (5).
7, a kind of granule magnesium molten iron desulfuring spray gun according to claim 4 is characterized in that: be furnished with refractory sleeve (7) outside the described nozzle (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201853990U CN201165534Y (en) | 2007-12-30 | 2007-12-30 | Granule magnesium molten iron desulfuring spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201853990U CN201165534Y (en) | 2007-12-30 | 2007-12-30 | Granule magnesium molten iron desulfuring spray gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201165534Y true CN201165534Y (en) | 2008-12-17 |
Family
ID=40190918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201853990U Expired - Lifetime CN201165534Y (en) | 2007-12-30 | 2007-12-30 | Granule magnesium molten iron desulfuring spray gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201165534Y (en) |
-
2007
- 2007-12-30 CN CNU2007201853990U patent/CN201165534Y/en not_active Expired - Lifetime
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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 record no.: 2011210000043 Denomination of utility model: Granulated magnesium molten iron desulphurization spray gun Granted publication date: 20081217 License type: Exclusive License Record date: 20110513 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081217 |