CN102517413A - Multi-channel molten iron pretreatment desulfurization spray gun - Google Patents
Multi-channel molten iron pretreatment desulfurization spray gun Download PDFInfo
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- CN102517413A CN102517413A CN2012100044886A CN201210004488A CN102517413A CN 102517413 A CN102517413 A CN 102517413A CN 2012100044886 A CN2012100044886 A CN 2012100044886A CN 201210004488 A CN201210004488 A CN 201210004488A CN 102517413 A CN102517413 A CN 102517413A
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- shape arm
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention belongs to the field of ferrous metallurgy, and in particular relates to a multi-channel molten iron pretreatment desulfurization spray gun. The spray gun comprises a gun body, wherein the gun body comprises a framework (1) provided with a fireproof concrete lining (2), and a channel (3), a material flow distributor (4) and a straight branch pipe (5) which are arranged in the gun body; the feed port of the material flow distributor (4) is connected with the discharge port of the channel (3) in a matched mode; the discharge port of the material flow distributor (4) is fixedly connected with the feed port of the straight branch pipe (5) in a matched mode; a deflection angle alpha between the straight branch pipe (5) and a longitudinal axis of the spray gun is more than or equal to 28 degrees and less than or equal to 32 degrees; and the nominal diameters of eyeholes of the material flow distributor (4), the straight branch pipe (5) and a replaceable nozzle (6) are gradually reduced along the pushing direction of two-phase jet flow facing the outlet of the spray gun. The spray gun can improve the strength of feeding a granular magnesium material into molten iron, shortens the treatment period, ensures the pneumatic conveying reliability of the easily vaporized magnesium material, and ensures that the process meets the process requirement.
Description
Technical field
the invention belongs to ferrous metallurgy and belong to the ferrous metallurgy field, promptly in hot metal ladle, molten iron are done secondary desulfurization treatment facility field, relate in particular to a kind of hyperchannel desulfurizing spray gun for pretreating molten iron.
Background technology
known spray gun structure that uses magnesium to adopt as desulfurizing iron; At submerged type spray gun channel exit band vaporizing chamber; Stillization chamber, but adopt the mixture of pulverous magnesium and passivator (lime, carbide of calcium, rhombspar etc.).
above-mentioned spray gun all has some inherent shortcomings, and big such as the material consumption, the sweetening agent specific absorption is low, and mechanical means and spray gun device complicacy and benzene are heavy, and its result makes process complications, and desulphurization cost is high.The spray gun of band vaporizing chamber under the clear condition of molten iron bale capacity little (70 ~ 90t molten iron) successful solution in the vehicular bag, singly blow the problem of magnesium grain desulfurization.But in the large vol hot metal ladle during (more than the 160t molten iron) desulfurization; Spray gun slips into the big what 2m of the degree of depth; Vaporizing chamber is just no longer fulfiled the main function that makes magnesium vaporization, and when what large vol hot metal ladle processing molten iron (quite parameter) magnesium is in a liquid state because when 1300 ℃ of the high what 0.4Mpa of pressure, molten iron temperature.Simultaneously, there is the existence of vaporizing chamber can hinder magnesium, on the specific absorption that is embodied in sweetening agent that this also can be negative in the FR distribution of metal pool.Under this condition, must adopt the spray gun of stillization chamber.
Spray gun that the desulfurization of known large vol hot metal ladle uses is got as prototype in
.The channel outlet of this spray gun is vertical.Removable refractory sleeve of spray gun exit passage equipment, its protection passage makes it not contact with molten iron.Must be noted that when channel outlet is vertical state the jet of the two that comes out from spray gun is air bubble-shaped, turn back at the access incisions place upwards.The favourable what molten iron in the cave that forms in the melt is poured into the porthole, and molten iron is very near apart from through port, just can contact often.Even these contacts can cause flow velocity slack-off the stopping of moment of two, this can facilitate the spray gun passage to stop up.
adopt the desulfurization of large vol hot metal ladle when obtaining low-sulfur molten iron; Must be a large amount of (100 kilograms and more than) magnesia mixture, import molten iron; This can cause the treatment time to prolong, because confession magnesium intensity is looked the severity of process and is limited in 8～10kg/min scope.The utilization ratio of magnesium has descended under this clear condition.Elongated that the treatment time can reduce spray gun work-ing life and labor capacity is safeguarded in increase.
Summary of the invention
the present invention be intended to overcome the weak point of prior art and a kind of feeding strength of particle magnesium material in molten iron that improve be provided; Shorten the processing cycle; Guarantee to be prone to the safety of vaporization magnesium material pneumatic transport; The process of assurance is carried out according with process requirements (no splash), simplifies the spray gun remedial operation, and guarantees that the hot metal ladle desulfurization has the very hyperchannel desulfurizing spray gun for pretreating molten iron of high target.
for solving the problems of the technologies described above, the present invention is achieved in that the hyperchannel desulfurizing spray gun for pretreating molten iron, and it comprises gun body; Said gun body comprises the skeleton of being furnished with refractory concrete lining, places passage, materials flow divider and straight shape arm in the gun body; The pan feeding port of said materials flow divider and the discharging port of passage connect; The discharging port of said materials flow divider fixedly connects with the pan feeding port of straight shape arm; Said straight shape arm is to the 28 °≤a in drift angle of spray gun longitudinal center line≤32 °.
as a kind of preferred version, straight shape arm according to the invention is 30 ° to the drift angle a of spray gun longitudinal center line.
as another kind of preferred version, the present invention fixedly is furnished with replaceable nozzle in the end of said straight shape arm.
further, the direction of propulsion that the inside nominal diameter of the eyelet of materials flow divider according to the invention, straight shape arm and replaceable nozzle exports along dual-phase jet towards spray gun dwindles one by one.
further, the 28 °≤b of level angle on the inclined-plane, bottom of gun body according to the invention≤32 °.
in addition, the present invention is with pillar in the passage external fixation in said gun body.
contrast the structure of the application's spray gun and prototype and show: the spray gun channel exit replenishes has equipped materials flow divider, straight shape arm and replaceable nozzle, has all made separately independently parts.Straight shape arm is 28 °～32 ° to spray gun vertical axis angle of bend; The eyelet inside nominal diameter of materials flow divider, straight shape arm and replaceable nozzle exports direction of propulsion and dwindles one by one along two towards spray gun.The sectional area of what spray gun passage inside nominal diameters such as the interior section area summation of each straight shape arm.Replaceable nozzle is 0.6～0.9 with the interior section area ratio of straight shape arm.
These characteristics that
are come the application's device and prototype difference also fail to find in other technical scheme of present technique field, thereby meet the criterion of " invention level ".
Technique effect when
employing is of the present invention is: the feeding strength that imports magnesia mixture molten iron improves 50～100%, and the entire treatment cycle shortens 15～20%; Assurance makes the stable entering molten iron of magnesium material that is prone to vaporization; The molten iron containing quantity of handling with hot metal ladle can reach its volumetrical 95～97%; Simplify the spray gun maintenance and repair; Magnesium absorption rate high (more than 90%).
Description of drawings
are described further the present invention below in conjunction with accompanying drawing and embodiment.
Fig. 1 is a spray gun substructure longitudinal diagram of the present invention.
Among
figure: 1, skeleton; 2, refractory concrete lining; 3, passage; 4, materials flow divider; 5, straight shape arm; 6, replaceable nozzle; 7, replaceable refractory sleeve; 8, pillar.
Embodiment
are as shown in the figure, the hyperchannel desulfurizing spray gun for pretreating molten iron, and it comprises gun body; Said gun body comprises the skeleton 1 of being furnished with refractory concrete lining 2, places passage 3, materials flow divider 4 and straight shape arm 5 in the gun body; The pan feeding port of said materials flow divider 4 and the discharging port of passage 3 connect; The discharging port of said materials flow divider 4 fixedly connects with the pan feeding port of straight shape arm 5; 28 °≤a in drift angle of 5 pairs of spray gun longitudinal center line of said straight shape arm≤32 °.
when concrete design, the drift angle a of 5 pairs of spray gun longitudinal center line of straight shape arm according to the invention is 30 °.
the present invention fixedly is furnished with replaceable nozzle 6 in the end of said straight shape arm 5.
The inside nominal diameter d of the eyelet of materials flow divider according to the invention 4, straight shape arm 5 and replaceable nozzle 6
1
, d
2
, d
3
The direction of propulsion of outlet dwindles one by one along dual-phase jet towards spray gun.
28 °≤the b of level angle on the inclined-plane, bottom of
gun body according to the invention≤32 °.
for increasing the protective effect to passage 3, the present invention is with pillar 8 in passage 3 external fixation in said gun body.
Spray gun passage of the present invention replenishes materials flow divider of equipment in the exit, some straight shape arms and removable nozzle are all made separately independently parts; Straight shape arm is 28 °≤b≤32 ° to the angle of bend of the spray gun longitudinal axis, the inside nominal diameter d of materials flow divider, straight shape arm and replaceable nozzle eyelet
1
, d
2
, d
3
Propulsive direction is dwindled one by one along two towards gun slot; The summation of section area equates with the inside nominal diameter sectional area of spray gun passage in each straight shape arm; Replaceable nozzle is 0.6～0.9 with the interior section area ratio of straight shape arm.
referring to Fig. 1, spray gun of the present invention comprises the skeleton 1 of building refractory concrete lining 2.There is passage 3 spray gun inside, and materials flow divider 4 is received on the passage 3.Straight shape arm 5 is installed in the bottom of materials flow divider 4.Be fixed with replaceable nozzle 6 with thread connecting mode on the straight shape arm 5.The outside of replaceable nozzle 6 is protected with replaceable refractory sleeve 7.
The mode of operation of
the application's device is following: open the carrier gas steam supply valve, slip into spray gun in the molten iron to the necessary degree of depth.Connect material feeder (not shown on the figure), particle magnesium gets into spray gun passage 3 through injection system (not shown on the figure), and enters into molten iron through materials flow divider 4, straight shape arm 5 and replaceable nozzle 6 then.Behind the sweetening agent that imports necessary amounts, stop to supply magnesium, carry rifle, stop supplying carrier gas.
The essence of
the application's device is following.
spray gun passage of the present invention replenishes in the exit has equipped materials flow divider, straight shape arm and replaceable nozzle; All make separately independently parts; So just can be divided into two and two above materials flows to gas powder jet; Because the guide point spreads out in the molten bath, thereby improved the feeding strength in molten iron, process more according with process requirements and nozzle otch reliable work and do not have molten iron and pour in have been guaranteed.In addition, one section of dispensing system outlet is made into separately independently parts, and that has also improved spray gun is convenient to repair performance.
The angle that
materials flow divider of the present invention departs from the spray gun longitudinal center line can be designed to 30 ° of pulsation that injection system is produced, fluctuation is tending towards minimum.
straight shape arm is to bent angle a=30 ° of the spray gun longitudinal center line; Make magnesium steam and carrier gas form in the molten iron treating processes bubble flow away from the nozzle mouth; Bubble seldom possibly contact with the spray gun nozzle is terminal when come-up; That is to say that the bubbling area of molten iron is moved away to by the side of nozzle mouth.Like this, time that the nozzle mouth contacts with molten iron and frequency are just quite few.In the life-span prolongation that is embodied in replaceable nozzle and refractory sleeve that this surely can be useful, significantly reduced the probability of spray gun channel jam.
The eyelet d1 of
materials flow divider, straight shape arm and replaceable nozzle; D2; The inside nominal diameter of d3 is dwindled towards the propulsive direction of nozzle mouth along two one by one, has so just improved the speed of nozzle exit two, thereby has avoided molten iron to pour in the nozzle mouth.
The total area in cross section equals the area of spray gun passage inside nominal diameter in
each straight shape arm; The movement velocity in each straight shape arm and the concentration of solid phase in air-flow remain unchanged basically in the spray gun passage with at it so just to make dual-phase jet, and this is the important factors that guarantees the injection system working reliability.
The interior section area of
replaceable nozzle and straight shape arm is adopting under the granular desulfuration agent desulfurization situation than less than 0.6 o'clock, can make shock resistance rising in the main line because solid phase in pipeline, " collapses material ", makes the nozzle obstruction then.
straight shape arm compares greater than 0.9 o'clock with the interior section area of replaceable nozzle, and then the speed of nozzle incision two has only raising slightly, thereby also unreasonable.
nozzle is made removable, and couples together with threaded connector and straight shape arm, just can make the fast quick-detach of nozzle of wearing and tearing and renews.Nozzle dismounting and the method that renews are following: in the nozzle that has worn and torn, squeeze into the special-purpose rod of the taper that rib is arranged of a band handle, nozzle just can be twisted from straight shape arm and taken off, and is screwed into new nozzle in the straight shape arm again.So just needn't dismantle whole spray gun place under repair, also needn't change the whole passage that has materials flow divider and straight shape arm.Repair work can be carried out on station, only takies 5～10 minutes.
are visible from above narration, and the device of application can guarantee stable to import molten iron to particulate magnesium under large vol hot metal ladle condition, under the very big situation of sweetening agent consumption, also can guarantee the even bubbling of iron bath simultaneously.The maintenance and repair operation of spray gun is accelerated and simplified to this device.Simultaneously, molten iron dressing rate can reach 95～97% in the bag, and the magnesia mixture specific absorption is more than 90%, thereby has solved the problem that proposes, and has reached the technique effect of expection.
be with being appreciated that, more than about specific descriptions of the present invention, only be used to the present invention is described and be not to be subject to the described technical scheme of the embodiment of the invention.Those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention, to reach identical technique effect.As long as satisfy the use needs, all in protection scope of the present invention.
Claims (6)
1. the hyperchannel desulfurizing spray gun for pretreating molten iron comprises gun body, it is characterized in that: said gun body comprises the skeleton (1) of being furnished with refractory concrete lining (2), places passage (3), materials flow divider (4) and straight shape arm (5) in the gun body; The discharging port of the pan feeding port of said materials flow divider (4) and passage (3) connects; The discharging port of said materials flow divider (4) fixedly connects with the pan feeding port of straight shape arm (5); Said straight shape arm (5) is to the 28 °≤a in drift angle of spray gun longitudinal center line≤32 °.
2. hyperchannel desulfurizing spray gun for pretreating molten iron according to claim 1 is characterized in that: said straight shape arm (5) is 30 ° to the drift angle a of spray gun longitudinal center line.
3. hyperchannel desulfurizing spray gun for pretreating molten iron according to claim 2 is characterized in that: fixedly be furnished with replaceable nozzle (6) in the end of said straight shape arm (5).
4. hyperchannel desulfurizing spray gun for pretreating molten iron according to claim 3 is characterized in that: the inside nominal diameter (d of the eyelet of said materials flow divider (4), straight shape arm (5) and replaceable nozzle (6)
1, d
2, d
3) along dual-phase jet towards spray gun the outlet direction of propulsion dwindle one by one.
5. hyperchannel desulfurizing spray gun for pretreating molten iron according to claim 4 is characterized in that: the 28 °≤b of level angle on the inclined-plane, bottom of said gun body≤32 °.
6. hyperchannel desulfurizing spray gun for pretreating molten iron according to claim 5 is characterized in that: in said gun body, be with pillar (8) in passage (3) external fixation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100044886A CN102517413A (en) | 2012-01-09 | 2012-01-09 | Multi-channel molten iron pretreatment desulfurization spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100044886A CN102517413A (en) | 2012-01-09 | 2012-01-09 | Multi-channel molten iron pretreatment desulfurization spray gun |
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| Publication Number | Publication Date |
|---|---|
| CN102517413A true CN102517413A (en) | 2012-06-27 |
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ID=46288475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100044886A Pending CN102517413A (en) | 2012-01-09 | 2012-01-09 | Multi-channel molten iron pretreatment desulfurization spray gun |
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| Country | Link |
|---|---|
| CN (1) | CN102517413A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388624A (en) * | 2014-12-04 | 2015-03-04 | 武汉钢铁(集团)公司 | Direct injection molten iron desulphurization spray gun |
| US11578384B2 (en) | 2017-05-18 | 2023-02-14 | Jiangsu University | Laser shock strengthening method for small-hole components with different thicknesses |
-
2012
- 2012-01-09 CN CN2012100044886A patent/CN102517413A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388624A (en) * | 2014-12-04 | 2015-03-04 | 武汉钢铁(集团)公司 | Direct injection molten iron desulphurization spray gun |
| CN104388624B (en) * | 2014-12-04 | 2017-05-17 | 武汉钢铁(集团)公司 | Direct injection molten iron desulphurization spray gun |
| US11578384B2 (en) | 2017-05-18 | 2023-02-14 | Jiangsu University | Laser shock strengthening method for small-hole components with different thicknesses |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120627 |