CN102443681B - Granulated magnesium molten iron desulphurization spray gun - Google Patents
Granulated magnesium molten iron desulphurization spray gun Download PDFInfo
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- CN102443681B CN102443681B CN 201110434748 CN201110434748A CN102443681B CN 102443681 B CN102443681 B CN 102443681B CN 201110434748 CN201110434748 CN 201110434748 CN 201110434748 A CN201110434748 A CN 201110434748A CN 102443681 B CN102443681 B CN 102443681B
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Abstract
The invention belongs to the field of ferrous metallurgy and particularly relates to a granulated magnesium molten iron desulphurization spray gun. The spray gun comprises a skeleton (1) provided with a refractory lining (2) and a spray gun channel (3), wherein a two-phase flow divider (4) is fixed on the end of the spray gun channel (3); a linear branched pipe (6) is fixed at the outlet of the two-phase flow divider (4); a conical splitting device (5) is fixed on the end, corresponding to the inlet of the linear branched pipe (6), of the extension section of the spray gun channel (3) in the two-phase flow divider, wherein the conical splitting device (5) is at the bottom of the two-phase flow divider (4); the conical splitting device (5) is a cylinder provided with a tip, and the tip of the conical splitting device points to the direction of the spray gun channel (3); and the inclination alpha of the inclined plane to the longitudinal axis of the conical splitting device is the half of the inclination beta of the linear branched pipe (6) to the longitudinal axis of the spray gun. By adopting the granulated magnesium molten iron desulphurization spray gun, the feeding intensity of granulated magnesium introduced in molten iron can be increased, the pneumatic conveying reliability of granulated magnesium can be ensured and high desulfurization index can be realized in the large-scale ladle.
Description
Technical field
The invention belongs to ferrous metallurgy device field, is to belong to stove to handle molten iron outward specifically, can be used for being a large amount of desulfurizing irons, is included in to be the granule magnesium molten iron desulfuring spray gun of desulfurizing iron in the large-scale hot metal ladle of 140～350t.
Background technology
The known spray gun that uses when being desulfurizing iron with particle magnesium in large-scale hot metal ladle is a nozzle, and it comprises a skeleton that refractory lining is arranged, crooked passage, dismountable fireproof casing and removable nozzle.Couple together with a threaded engagement between nozzle and bending channel.Install and fix a thrust washer on the replaceable nozzle.The angle of bend of the relative what spray gun of the spray gun passage longitudinal axis is 30～50 ℃, and the bending radius of passage is not less than 100mm.
Shortcoming of the known molten iron desulfuring spray gun of this structure be for magnesium intensity have certain limitation (6～12kg/min), more inadequate when especially used hot metal ladle freeboard less (0.4m is following) and the fierce degree of sweetening process are higher.
This in big hot metal ladle the spray gun of desulfurization (using particle magnesium) usefulness as prototype, comprise the skeleton and the spray gun passage that hang with refractory lining, the spray gun passage replenishes two phase flow splitter of equipment in the exit, crooked arm and removable nozzle, these all become independently parts, simultaneously, two phase flow is not more than 15 ° with respect to the separately angle of the spray gun longitudinal axis in the splitter, arm is 35～50 ° with respect to the angle of bend of the spray gun longitudinal axis, in the splitter, the route that the inside nominal diameter of eyelet advances to the spray gun outlet with two phase flow in the arm and in the replaceable nozzle and dwindling gradually, the summation of section area equals the spray gun cross sectional area in each arm, and the ratio of section area is 0.6～0.9 in replaceable nozzle and the arm.
The splitter that a shortcoming of prototype is two phase flow is manufactured complexity, because diversion structure is subjected to the restriction (being not more than 15 °) of minute of angle, and arm needs bending (35～50 °), and this just makes and manufactures is very much complicated and the expense of manufacturing increases.The bending of arm has also strengthened the resistance of defeated magnesium pipeline part.In addition, this structure of splitter can not guarantee that two phase flow has enough sufficient shunt before entering arm, because some solid phase material is when colliding with the splitter inwall, may be to the deceleration of motion of total materials flow of shunting not as yet, cause shock resistance to increase and produce vibrating, thereby the necessary situation that strengthens carrier gas flux occurs.Enlargement in section causes the speed loss of two phase flow in the splitter after the access incisions, has also hindered the further rationalization of injection parameter, namely hinders the raising of material concentration in the carrier gas and the reduction of carrier gas flux.
When the processing high-sulphur molten iron is produced low-sulfur molten iron in large-scale hot metal ladle, must be to the magnesium more than the importing 200kg in the melt.Although can guarantee under the situation of 14～20kg/min for magnesium intensity at two nozzle spray guns, it is still very long by (10～14min) to spray into the required time of magnesium material in the molten iron.Handling oversize meeting of time spent causes spray gun to safeguard that labor capacity strengthens and service life of lance shortens.In addition, the molten iron groundwater increment also is restricted in the hot metal ladle, and the freeboard height should be not less than 0.4m in the bag.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art part and a kind of feeding strength that imports particle magnesium in the molten iron that improves is provided, and guarantees the reliability of air conveying particle magnesium material, reaches the granule magnesium molten iron desulfuring spray gun of desulfurization high target in large-scale hot metal ladle.
For solving the problems of the technologies described above, the present invention is achieved in that
Granule magnesium molten iron desulfuring spray gun, it comprises skeleton and the spray gun passage of being with refractory lining; Be fixed with the two phase flow splitter in the end of spray gun passage; Be fixed with the linear arm in the exit of described two phase flow splitter; In the bottom of described two phase flow splitter, in two phase flow splitter extension, line correspondence shape arm ingress, end is fixed with taper and splits the branch device in the spray gun passage.
As a kind of preferred version, it is the right cylinder that has tip that the branch device is split in taper of the present invention, and its tip points to the spray gun channel direction; Described taper is split branch device tip cone bottom diameter and is equaled the spray gun channel diameter.
As another kind of preferred version, the tip that the branch device is split in taper of the present invention forms some scarp; The inclination alpha that the branch device longitudinal axis is split to taper in described scarp equals the linear arm to half of spray gun longitudinal axis angle of inclination beta.
Further, the quantity on scarp of the present invention equals the number of linear arm, and each scarp is corresponding with the entrance of linear arm.
Further, the point of contact, bottom of branch device scarp and barrel portion is split in taper of the present invention, coincides with the bottom point of contact K of spray gun passage at two phase flow splitter extension eyelet with linear arm eyelet.
In addition, the entrance eye diameter of linear arm of the present invention is selected by following proportionlity:
In the formula: d в х is linear arm entrance eye diameter, mm;
D κ is the spray gun channel diameter, mm;
N is the quantity of linear arm, number.
Secondly, the present invention is fixed with replaceable nozzle in the exit of described linear arm.
Again, the present invention is with fire-resistant bushing pipe at described replaceable nozzle.
The hand-hole of linear arm of the present invention can be made the shape of tapering, and its cone angle control is between 5～10 °.
The effect that industry adopts this spray gun to obtain is: guaranteed to feed the feed stability of particle magnesium in molten iron, improved for magnesium intensity, improved the filling level of molten iron in the hot metal ladle, shortened the time of handling molten iron, reduced the laboring fee of repairing spray gun and used.
The spray gun of applying for a patent and its prototype are compared, show that its difference is: in the two phase flow splitter, inserted a taper and split the branch device, cone bottom diameter equals the spray gun channel diameter, and the inclination alpha that the branch device longitudinal axis is split to taper in the scarp equals the linear arm to half of spray gun longitudinal axis angle of inclination beta.At this moment, arm becomes linear, and its inlet diameter is selected by following relational expression:
In the formula: d в х is linear arm entrance eye diameter, mm;
D κ is the spray gun channel diameter, mm;
N is the quantity of linear arm, number.
Therefore, this spray gun of applying for conforms to " invention " criterion.
This kind spray gun of applying for a patent other technical scheme with the same industry is compared, can not find the wherein feature of different what prototype.Therefore, this spray gun meets the criterion of " invention level ".
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is spray gun substructure longitudinal diagram of the present invention.
Among the figure: 1, skeleton; 2, refractory lining; 3, spray gun passage; 4, two phase flow splitter; 5, the branch device is split in taper; 6, linear arm; 7, replaceable nozzle; 8, fire-resistant bushing pipe.
Embodiment
As shown in the figure, granule magnesium molten iron desulfuring spray gun, it comprises skeleton 1 and the spray gun passage 3 of being with refractory lining 2; Be fixed with two phase flow splitter 4 in the end of spray gun passage 3; Be fixed with linear arm 6 in the exit of described two phase flow splitter 4; In the bottom of described two phase flow splitter 4, in two phase flow splitter extension, line correspondence shape arm 6 ingress, end are fixed with taper and split branch device 5 in spray gun passage 3.
The right cylinder of branch device 5 for having split in taper of the present invention, and its tip points to spray gun passage 3 directions; Described taper is split branch device 5 tip cone bottom diameters and is equaled spray gun passage 3 diameters.
The tip that branch device 5 is split in taper of the present invention forms some scarp; The inclination alpha that the branch device longitudinal axis is split to taper in described scarp equals half of 6 pairs of spray gun longitudinal axis of linear arm angle of inclination beta.
The quantity on scarp of the present invention equals the number of linear arm 6, and each scarp is corresponding with the entrance of linear arm 6.
The point of contact, bottom of branch device 5 scarp and barrel portion is split in taper of the present invention, coincides with the bottom point of contact K of spray gun passage 3 at two phase flow splitter extension eyelet with linear arm 6 eyelets.
The entrance eye diameter of linear arm 6 of the present invention is selected by following proportionlity:
In the formula: d в х is linear arm entrance eye diameter, mm;
D κ is the spray gun channel diameter, mm;
N is the quantity of linear arm, number.
The present invention is fixed with replaceable nozzle 7 in the exit of described linear arm 6.
The present invention is with fire-resistant bushing pipe 8 at described replaceable nozzle 7.
The spray gun of the present patent application patent comprises skeleton 1, the refractory lining 2 on the skeleton, and spray gun passage 3, branch device 5 is split in two phase flow splitter 4 and the taper of inserting wherein, linear arm 6 and replaceable nozzle 7, the fire-resistant bushing pipe 8 of embedded of equipment in the arm 6.
The diameter of the what spray gun passages 3 such as cone bottom diameter of branch device 5 is split in taper.
The diameter of linear arm hand-hole is selected according to following relationship:
In the formula: d в х is linear arm entrance eye diameter, mm;
D κ is the spray gun channel diameter, mm;
N is the quantity of linear arm, number.
The mode of operation of this spray gun is as follows: when the surplus pressure (gauge pressure) that causes in the magnesium feed bin (not shown on the figure) surpasses spray gun and slips in the molten iron during resistance of injection system, the carrier gas supply of connection from the magnesium feed bin to spray gun is inserted into spray gun the degree of depth that reaches a necessity in the molten iron.Connect the metering feeding device (not shown on the figure) of magnesium desulfurizer, particulate state magnesium material just enters spray gun passage 3 in the pneumatic transport mode, enters into the molten iron melt by two phase flow splitter 4, linear arm 6 and replaceable nozzle 7 then.Feeding and must namely ending feed behind the magnesium desulfurizer of quantity, spray gun is proposed from molten iron, stop carrier gas and supply with.
The main points of this spray gun of declaring patent are as follows:
In the two phase flow splitter, insert a taper and split the branch device;
Cone bottom diameter equals the spray gun channel diameter, and the inclination alpha that the branch device longitudinal axis is split to taper in described scarp equals the linear arm to half of spray gun longitudinal axis angle of inclination beta.So just guaranteed that the solid phase particles in the two phase flow is equal to each input angle of splitting the branch device, each reflection angle also equates, thereby helps particle to move along the direction parallel with linear arm axis.In the two phase flow splitter, replenish and equipped taper and split branch device and some linear arms, selection that the linear arm is gone into bore dia will make these hand-holes have point of contact at (point of contact) and become tapering, has just guaranteed that two phase flow was evenly distribute basically before entering arm.The branch of splitting device has been arranged in the two phase flow splitter, make the degree of expansion of spray gun passage after otch reduce to minimum, this helps two phase flow not only in two arms, and the distribution in 3,4 even more arm is uniform, make the speed loss of two phase flow reduce to minimum, thereby improved the concentration of particle magnesium in carrier gas.
The linear arm is gone into bore dia by relational expression
Select, no matter be in order to make these arm quantity what be arranged, all be placed in the splitter, and the hand-hole that makes them has common point of contact, that is to say, equal in the circumference of spray gun channel diameter at diameter, cut a regular polygon (positive n limit shape) that n limit arranged, its length of side equals the diameter of linear arm hand-hole.This technical scheme that proposes has guaranteed two phase flow is directly imported in the hand-hole of linear arm, that is to say the generation of having got rid of situations such as vibration, disturbance and resistance increase in injection system.
Tapering α=5～10 of linear arm hand-hole ° can be reduced by the shock resistance of spray gun passage to linear arm transit time, have stablized two phase flow velocity of flow before jet is gone out spray gun in arm and in nozzle.When the tapering of hand-hole during greater than α=10 °, the resistance of this section obviously increases, and namely produces vibration in the injection system.If tapering also is irrational from the structure angle less than α=5 °.
Comprehensive the above as can be seen, this spray gun of request for utilization patent, can guarantee stable, have very high feeding strength particulate state magnesium is sent into molten iron, shorten the whole cycle of handling molten iron.The molten iron that magnesium is sent into that disperses has been added rational injection parameter, just can guarantee the carrying out of stable technical process, and can pour into more molten iron to hot metal ladle and make to stablize under the less situation of freeboard and carry out.Meanwhile, the technico-economical comparison of process also improves to some extent, comprises that service life of lance prolongs, and its maintenance cost reduces, and hot metal temperature drop diminishes during the winding-up, and melt improves the specific absorption of magnesium, natural solution the problem that proposes, reached desired result.
Be with being appreciated that, more than about specific descriptions of the present invention, only be used for explanation the present invention 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.Use needs as long as satisfy, all in protection scope of the present invention.
Claims (6)
1. granule magnesium molten iron desulfuring spray gun comprises skeleton (1) and the spray gun passage (3) of being with refractory lining (2); It is characterized in that, be fixed with two phase flow splitter (4) in the end of spray gun passage (3); Be fixed with linear arm (6) in the exit of described two phase flow splitter (4); In the bottom of described two phase flow splitter (4), in two phase flow splitter extension, end line correspondence shape arm (6) ingress is fixed with taper and splits branch device (5) in spray gun passage (3); The tip that branch device (5) is split in described taper forms some scarp; The inclination alpha that the branch device longitudinal axis is split to taper in described scarp equals linear arm (6) to half of spray gun longitudinal axis angle of inclination beta.
2. granule magnesium molten iron desulfuring spray gun according to claim 1, it is characterized in that: the quantity on described scarp equals the number of linear arm (6), and each scarp is corresponding with the entrance of linear arm (6).
3. granule magnesium molten iron desulfuring spray gun according to claim 2, it is characterized in that: the point of contact, bottom of branch device (5) scarp and barrel portion is split in described taper, coincides with the bottom point of contact K of spray gun passage (3) at two phase flow splitter extension eyelet with linear arm (6) eyelet.
4. granule magnesium molten iron desulfuring spray gun according to claim 3 is characterized in that: the entrance eye diameter of described linear arm (6) is selected by following proportionlity:
In the formula: d
BXBe linear arm entrance eye diameter, mm;
Dk is the spray gun channel diameter, mm;
N is the quantity of linear arm, number.
5. granule magnesium molten iron desulfuring spray gun according to claim 4 is characterized in that: be fixed with replaceable nozzle (7) in the exit of described linear arm (6).
6. granule magnesium molten iron desulfuring spray gun according to claim 5 is characterized in that: be with fire-resistant bushing pipe (8) at described replaceable nozzle (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110434748 CN102443681B (en) | 2011-12-22 | 2011-12-22 | Granulated magnesium molten iron desulphurization spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110434748 CN102443681B (en) | 2011-12-22 | 2011-12-22 | Granulated magnesium molten iron desulphurization spray gun |
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| Publication Number | Publication Date |
|---|---|
| CN102443681A CN102443681A (en) | 2012-05-09 |
| CN102443681B true CN102443681B (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110434748 Expired - Fee Related CN102443681B (en) | 2011-12-22 | 2011-12-22 | Granulated magnesium molten iron desulphurization spray gun |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2680679Y (en) * | 2003-12-29 | 2005-02-23 | 鞍钢附企冶金设备机电修造厂 | Spray gun for desulfurization |
| CN101906512A (en) * | 2010-08-19 | 2010-12-08 | 中冶赛迪工程技术股份有限公司 | Spray gun for desulfuration of single-spray particle magnesium molten iron |
| CN201825976U (en) * | 2010-10-15 | 2011-05-11 | 刘东业 | Spray gun for desulphurizing granular magnesium molten iron |
| CN202465768U (en) * | 2011-12-22 | 2012-10-03 | 刘东业 | Melted iron desulfurization spray gun utilizing granular magnesium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4273688B2 (en) * | 2000-11-16 | 2009-06-03 | Ｊｆｅスチール株式会社 | Converter blowing method |
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2011
- 2011-12-22 CN CN 201110434748 patent/CN102443681B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2680679Y (en) * | 2003-12-29 | 2005-02-23 | 鞍钢附企冶金设备机电修造厂 | Spray gun for desulfurization |
| CN101906512A (en) * | 2010-08-19 | 2010-12-08 | 中冶赛迪工程技术股份有限公司 | Spray gun for desulfuration of single-spray particle magnesium molten iron |
| CN201825976U (en) * | 2010-10-15 | 2011-05-11 | 刘东业 | Spray gun for desulphurizing granular magnesium molten iron |
| CN202465768U (en) * | 2011-12-22 | 2012-10-03 | 刘东业 | Melted iron desulfurization spray gun utilizing granular magnesium |
Non-Patent Citations (2)
| Title |
|---|
| 倪红卫等.新型铁水颗粒镁脱硫喷枪的研究.《钢铁研究学报》.2011,第23卷(第9期),16-21. |
| 新型铁水颗粒镁脱硫喷枪的研究;倪红卫等;《钢铁研究学报》;20110930;第23卷(第9期);16-21 * |
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| CN102443681A (en) | 2012-05-09 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: YINGKOU DSMK TECHNOLOGY DEVELOPMENT CO., LTD. Free format text: FORMER OWNER: LIU DONGYE Effective date: 20131204 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131204 Address after: Air Dashiqiao Steel City Management District Street Liaoning city of Yingkou province in new 115100 Patentee after: YINGKOU DSMK TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 14 building, Yingkou bank, Ha Ha Road, Dashiqiao, Liaoning, Yingkou 115100 Patentee before: Liu Dongye |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20171222 |
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| CF01 | Termination of patent right due to non-payment of annual fee |