CN213507051U - Multi-taper oxygen lance capable of automatically removing slag and having long service life - Google Patents
Multi-taper oxygen lance capable of automatically removing slag and having long service life Download PDFInfo
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- CN213507051U CN213507051U CN202022292765.0U CN202022292765U CN213507051U CN 213507051 U CN213507051 U CN 213507051U CN 202022292765 U CN202022292765 U CN 202022292765U CN 213507051 U CN213507051 U CN 213507051U
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Abstract
A multi-taper oxygen lance which can automatically deslag and has long service life belongs to the technical field of ferrous metallurgy. Can take off sediment by oneself and high life's many tapers oxygen rifle includes body of a gun and rifle head, body of a gun and rifle head are connected through many tapers barrel, many tapers barrel includes inlayer pipe, intermediate layer pipe and outer pipe that from interior to exterior set gradually, the intraductal oxygen passageway that is of inlayer, be cooling inhalant canal between inlayer pipe and the intermediate layer pipe, be cooling return water passageway between intermediate layer pipe and the outer pipe, the inlayer pipe is the straight tube, the pipe wall of intermediate layer pipe and outer pipe corresponds parallelly, outer pipe includes the big tapering pipeline section that sets gradually from the rifle head to the body of a gun direction, the variable taper pipeline section, little tapering pipeline section and back taper pipeline section. The multi-taper oxygen lance capable of automatically deslagging and having long service life can reduce the volume of the oxygen lance, can automatically desquamate steel slag, and has strong economic applicability, simple manufacturing process and long service life.
Description
Technical Field
The utility model relates to the technical field of ferrous metallurgy, in particular to a multi-taper oxygen lance which can automatically deslag and has long service life.
Background
In steel smelting, when oxygen guns are used for blowing in a converter or an electric furnace, steel slag can be fully adhered to the gun body, the adhered steel length is fully covered from the nozzle of the oxygen gun to the gun body at a position 3-7 meters away from the gun body, the thickness is nearly 200mm at the thickest, and the extreme thickness is over 300 mm. Although various measures are taken by various steel mills to reduce or eliminate the gun sticking phenomenon, such as the following steps are taken: the top-blown high-pressure nitrogen is used for slag splashing and furnace protection, the heat-insulating or refractory materials (fluorite, alumina and the like) which dilute or do not stick to steel slag are coated on the easy steel splashing area of the oxygen lance body, a mechanical slag hanging device or a sprayer is arranged on the furnace body, and the slag hanging or non-stick slag material is sprayed on the oxygen lance body each time, so that the effect is very little.
The straight-tube oxygen lance for the converter is usually adhered with steel slag, the adhered lance object is not only slag, but also a steel slag mixture, the adhered slag is not cleaned in time, the adhered slag surface of the lance body is enlarged, the bearing weight of the lance body is increased, the gun lifting of a balance weight mechanism is difficult even a nitrogen sealing mechanism is blocked, blowing production is suspended, slag has to be cleaned on line, when the thin-wall steel slag adhered object is processed on line, a knocking or stripping method can be used, a mode of combining oxygen cutting and a crowbar is needed to be adopted for heavy practice, the operation environment is very severe, the working strength is very high, the steel slag easily damages people, the high-temperature scald, the sunstroke and the like, and the oxygen cutting carelessly damages a cooling water channel device of the oxygen lance, so that the oxygen lance is scrapped. The taper alpha of the large taper oxygen lance used in various domestic and foreign steel mills is different from 18' -2 degrees, generally in a taper value range, and the diameter of the maximum taper can reach phiBig (a)＝φSmall(1+2*L*tanα)，φBig (a)Is the diameter of the large end of the taper region phiSmallThe diameter of the small end of the taper area shows that the larger the taper angle alpha is, the longer the taper area L is, the heavier the oxygen lance is, the inconvenience in installation and maintenance is caused, and the cost performance is not high.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem existing in the prior art, the utility model provides a can deslag by oneself and long-life many tapers oxygen rifle, its volume that can reduce the oxygen rifle can drop the slag by oneself, economic suitability is strong, preparation simple process, long service life.
In order to realize the purpose, the technical scheme of the utility model is that:
a multi-taper oxygen lance capable of automatically removing slag and having a long service life comprises a lance body and a lance head, wherein the lance body is connected with the lance head through a multi-taper barrel, the multi-taper barrel comprises an inner layer pipe, a middle layer pipe and an outer layer pipe which are sequentially arranged from inside to outside, an oxygen channel is arranged in the inner layer pipe, a cooling water inlet channel is arranged between the inner layer pipe and the middle layer pipe, and a cooling water return channel is arranged between the middle layer pipe and the outer layer pipe;
the inner layer pipe is a straight pipe, the pipe walls of the middle layer pipe and the outer layer pipe are correspondingly parallel, the outer layer pipe comprises a large taper pipe section, a variable taper pipe section, a small taper pipe section and an inverted taper pipe section which are sequentially arranged from the gun head to the gun body, the large taper pipe section comprises 1-3 taper pipes, the taper range of each taper pipe of the large taper pipe section is 1.5-3.5 degrees, and each taper of the large taper pipe section is gradually reduced from one end close to the gun head to one end close to the variable taper pipe section; the variable taper pipe section comprises 2-6 taper pipes, the taper range of each taper pipe of the variable taper pipe section is 20' -1.5 degrees, and each taper of the variable taper pipe section is gradually reduced from one end close to the large taper pipe section to one end close to the small taper pipe section; the small-taper pipe section comprises 1-3 taper pipes, the taper range of each taper pipe of the small-taper pipe section is 18' -1.2 degrees, and each taper of the small-taper pipe section is gradually reduced from one end close to the tapered pipe section to one end close to the inverted taper pipe section.
Further, the length of the large taper pipe section is 0.5-3 m; the length of the variable taper pipe section is 0.5-4m, and the length of the small taper pipe section is 0.5-4 m; the length of the inverted cone pipe section is 0.3m-1 m.
Furthermore, the large taper pipe section, the variable taper pipe section, the small taper pipe section and the inverted taper pipe section are sequentially welded and connected.
Furthermore, the gun head adopts a copper-steel composite oxygen lance nozzle.
Furthermore, the large taper pipe section of the outer layer pipe is welded with the steel part of the gun head, the middle layer pipe is connected with the gun head in an inserting mode, the inner layer pipe is connected with the gun head in a sealing mode, and the inverted taper pipe section, the middle layer pipe and the inner layer pipe of the outer layer pipe are respectively welded with the gun body.
Furthermore, a cladding layer is arranged on the outer surface of the outer layer pipe, the thickness of the cladding layer is 0.2-5mm, and the cladding layer is made of a nickel-based composite material containing magnesium oxide and zirconium oxide.
The utility model has the advantages that:
1) the multi-taper oxygen lance which can automatically deslag and has long service life has strong economic applicability, simple manufacturing process, excellent cost performance and long service life, can automatically drop steel slag after being put into a converter for use, the dropping period is that three furnaces drop twice by themselves at least, each furnace blows for 20-24 minutes, and the service life can reach 2000 furnaces;
2) the utility model discloses according to the urgent demand of scene live and production unit, for solving the design that production potential safety hazard problem goes on, wherein, many tapers mean that the oxygen rifle easily glues the oxygen rifle body of sediment zone section (the outer pipe of many tapers barrel) and the many contained angles design scheme of oxygen rifle central line, the research of each period slag physicochemical isochange processes on the body of a gun of oxygen rifle converting of slagging-off by oneself, oxygen rifle easily adheres to the regional plasma cladding technique that uses the price/performance ratio height of slag, cladding nickel base adds the combined material of magnesium oxide and zirconia, make the slag through the dead weight and the clean stove of landing after expend with heat and contract with cold on the cladding that the body of a gun is difficult to adhere, promptly the utility model discloses a many tapers barrel and alloy cladding realize that the slag drops by oneself;
3) the utility model can reduce the volume of the oxygen lance through the multi-taper gun barrel, and the middle layer pipe adopts the multi-taper design along with the outer layer pipe, thereby ensuring smooth cooling water channel and stable water flow;
4) the utility model is suitable for a ferrous metallurgy converter and electric stove.
Additional features and advantages of the invention will be set forth in part in the detailed description which follows.
Drawings
FIG. 1 is a schematic structural view of a long-life multi-taper oxygen lance with self-deslagging function.
Reference numerals in the drawings of the specification include:
1-gun body, 2-inverted taper pipe section, 3-small taper pipe section, 4-variable taper pipe section, 5-large taper pipe section, 6-gun head, 7-outer layer pipe, 8-middle layer pipe, 9-inner layer pipe, 10-cooling water return channel, 11-cooling water inlet channel and 12-oxygen channel.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
As shown in fig. 1, the utility model provides a multi-taper oxygen lance which can automatically deslag and has long service life, comprising a lance body 1 and a lance head 6, wherein the lance body 1 and the lance head 6 are connected through a multi-taper lance tube, the multi-taper lance tube comprises an inner layer tube 9, a middle layer tube 8 and an outer layer tube 7 which are arranged from inside to outside in sequence, an oxygen channel 12 is arranged in the inner layer tube 9, a cooling water inlet channel 11 is arranged between the inner layer tube 9 and the middle layer tube 8, and a cooling water return channel 10 is arranged between the middle layer tube 8 and the outer layer tube 7;
the inner layer pipe 9 is a straight pipe, the pipe walls of the middle layer pipe 8 and the outer layer pipe 7 are correspondingly parallel, the outer layer pipe 7 comprises a large taper pipe section 5, a variable taper pipe section 4, a small taper pipe section 3 and an inverted taper pipe section 2 which are sequentially arranged from the gun head 6 to the gun body 1, the large taper pipe section 5 comprises 1-3 taper pipes, the taper range of each taper pipe of the large taper pipe section 5 is 1.5-3.5 degrees, and each taper of the large taper pipe section 5 is gradually reduced from one end close to the gun head 6 to one end close to the variable taper pipe section 4; the variable taper pipe section 4 comprises 2-6 taper pipes, the taper range of each taper pipe of the variable taper pipe section 4 is 20' -1.5 degrees, and each taper of the variable taper pipe section 4 is gradually reduced from one end close to the large taper pipe section 5 to one end close to the small taper pipe section 3; the small-taper pipe section 3 comprises 1-3 taper pipes, the taper range of each taper pipe of the small-taper pipe section 3 is 18' -1.2 degrees, and each taper of the small-taper pipe section 3 is gradually reduced from one end close to the taper pipe section 4 to one end close to the reverse taper pipe section 2.
Specifically, middle level pipe 8 adopts the many tapers design with outer layer pipe 7 profile, and the pipe wall of middle level pipe 8 and outer layer pipe 7 corresponds parallelly promptly, ensures the rivers passageway clearance, and rivers are steady, is provided with the brace rod between inner layer pipe 9, middle level pipe 8 and the outer layer pipe 7, prevents to shake. The pipe wall thickness of the outer layer pipe 7 is 6-12mm, each taper pipe in the large taper pipe section 5, the variable taper pipe section 4 and the small taper pipe section 3 is a seamless steel pipe, each seamless steel pipe has the same size as the small diameter end of each taper pipe in actual production, and each pipe section is processed by adopting a pipe expanding machine pipe expanding heating and pushing process.
Specifically, each taper of the large taper pipe section 5 gradually decreases from one end close to the gun head 6 to one end close to the variable taper pipe section 4, specifically, in 1-3 taper pipes of the large taper pipe section 5, the taper of the taper pipe close to one side of the gun head 6 is the largest, the taper of the taper pipe close to one side of the variable taper pipe section 4 is the smallest, the tapers of the taper pipes are sequentially reduced, 1-3 taper pipes in the large taper pipe section 5 are sequentially welded and connected, and the large diameter end of the previous taper pipe is welded with the small diameter end of the next taper pipe. The taper setting and the connection mode of each taper pipe in the variable taper pipe section 4 and the small taper pipe section 3 are the same as those of the large taper pipe section 5.
In the utility model, the length of the large taper pipe section 5 is 0.5-3 m; the length of the variable taper pipe section 4 is 0.5-4m, and the length of the small taper pipe section 3 is 0.5-4 m; the length of the inverted cone pipe section 2 is 0.3m-1 m. The large taper pipe section 5, the variable taper pipe section 4, the small taper pipe section 3 and the inverted taper pipe section 2 are welded and connected in sequence.
The utility model discloses in, rifle head 6 adopts the compound oxygen rifle shower nozzle of copper steel, and the compound oxygen rifle shower nozzle of copper steel belongs to more ripe technique, and the compound oxygen rifle shower nozzle of copper steel is from taking the circular arc transition and the outer wall is the tapering, and current domestic supplier has many families, and technical characteristic difference nature is not big, can directly order. The large taper pipe section 5 of the outer layer pipe 7 is welded with the steel part of the gun head 6, the middle layer pipe 8 is connected with the gun head 6 in an inserting mode, the inner layer pipe 9 is connected with the gun head 6 in a sealing mode, and the inverted taper pipe section 2, the middle layer pipe 8 and the inner layer pipe 9 of the outer layer pipe 7 are respectively welded with the gun body 1. Specifically, the inner layer pipe 9 is inserted into the gun head 6 and then sealed by a rubber ring. The utility model discloses an on-the-spot suitability is strong, directly exchanges with current oxygen rifle, does not cause any influence to production structure and factory building overall arrangement, and oxygen lance nozzle export oxygen speed can reach mach number 1.9-2.2, satisfies the converting demand in the multidimension degree stove, and molten iron converting depth and area can accurate effectual control.
In the utility model, the outer surface of the outer layer pipe 7 is provided with the cladding layer, the thickness of the cladding layer is 0.2-5mm, and the cladding layer is made of a nickel-based composite material with magnesium oxide and zirconium oxide. Specifically, the surface treatment process of the outer layer pipe 7 is a nickel-based magnesium oxide and zirconium oxide composite material cladded with non-stick steel slag, the powder utilization rate can reach 95%, the non-stick steel effect is good, and the cost performance is superior.
Example 1
The multi-taper oxygen lance capable of automatically deslagging and having long service life is used for a 150-ton converter in a certain steel mill, a lance head 6 adopts a five-hole copper-steel composite oxygen lance nozzle, and the maximum outer diameter of the five-hole copper-steel composite oxygen lance nozzle is 299 mm;
the large taper pipe section 5 comprises 2 taper pipes, wherein the taper of the taper pipe close to one side of the gun head 6 is 3 degrees, and the length of the taper pipe is 0.5 m; the taper of the taper pipe close to one side of the variable taper pipe section 4 is 2.3 degrees, and the length of the taper pipe is 1.3 m; 2 taper pipes are welded and connected;
the variable taper pipe section 4 comprises 3 taper pipes, and the taper of the first taper pipe is 1.8 degrees and the length of the first taper pipe is 1.5m from one side close to the large taper pipe section 5; the taper of the second taper pipe is 1.5 degrees, and the length is 1.2 m; the taper of the third taper pipe is 1.3 degrees, and the length is 1 m; 3 taper pipes are welded and connected in sequence;
the small taper pipe section 3 comprises 1 taper pipe, the taper of the taper pipe is 1.8 degrees, and the length of the taper pipe is 1 m;
the total length of the multi-taper gun pipe is 6.5m, and the total length of the oxygen lance is 21 m;
the surface of an outer layer tube 7 of the multi-taper gun tube is coated with a composite material of nickel base, magnesium oxide and zirconium oxide by plasma cladding, and the thickness of the cladding layer is 1.6 mm;
the blowing working parameters of the multi-taper oxygen lance are as follows: the oxygen pressure is 0.7-0.9MPa, the flow rate is 28000Nm3/h, and the maximum flow rate can be 32000Nm 3/h; cooling water inlet pressure of 0.9MPa-1.3MPa and flow rate of 275 +/-10 m3H; the requirement that the temperature of the molten steel is raised to 300-370 ℃ in 22 minutes can be met, the steel slag adhered to the multi-taper gun barrel can automatically fall off at least twice in three furnaces, one furnace is used for one time or the slag is removed while blowing is carried out in many cases, the online blowing effect is very obvious,the service life of the multi-taper oxygen lance is averagely more than 2000 furnaces.
Example 2
The multi-taper oxygen lance capable of automatically deslagging and having long service life is used for a 150-ton converter in a certain steel mill, a lance head 6 adopts a five-hole copper-steel composite oxygen lance nozzle, and the maximum outer diameter of the five-hole copper-steel composite oxygen lance nozzle is 299 mm;
the large taper pipe section 5 comprises 1 taper pipe, the taper of the taper pipe is 2.3 degrees, and the length of the taper pipe is 2 m;
the variable taper pipe section 4 comprises 3 taper pipes, and the taper of the first taper pipe is 1.5 degrees and the length of the first taper pipe is 1m from one side close to the large taper pipe section 5; the taper of the second taper pipe is 1.4 degrees, and the length is 1 m; the taper of the third taper pipe is 1.3 degrees, and the length is 1 m; 3 taper pipes are welded and connected in sequence;
the small taper pipe section 3 comprises 1 taper pipe, the taper of the taper pipe is 1.8 degrees, and the length of the taper pipe is 1 m;
the total length of the multi-taper gun barrel is 6m, and the total length of the oxygen lance is 22 m;
the surface of an outer layer tube 7 of the multi-taper gun tube is coated with a composite material of nickel base, magnesium oxide and zirconium oxide by plasma cladding, and the thickness of the cladding layer is 1.6 mm;
the blowing working parameters of the multi-taper oxygen lance are as follows: oxygen pressure of 0.7-0.9MPa and flow rate of 28000Nm3H, the maximum can be 32000Nm 3/h; cooling water inlet pressure of 0.9MPa-1.3MPa and flow rate of 275 +/-10 m3H; the requirement that the molten steel is raised to the temperature of 300-370 ℃ in 22 minutes, the steel slag adhered to the multi-taper lance tube can automatically fall off at least twice in three furnaces, one furnace is used for one time or the slag is removed while blowing is carried out in many cases, the online blowing effect is very obvious, and the service life of the multi-taper oxygen lance is more than 2000 furnaces on average.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. A multi-taper oxygen lance capable of automatically removing slag and having a long service life comprises a lance body and a lance head, and is characterized in that the lance body is connected with the lance head through a multi-taper lance tube, the multi-taper lance tube comprises an inner layer tube, a middle layer tube and an outer layer tube which are sequentially arranged from inside to outside, an oxygen channel is arranged in the inner layer tube, a cooling water inlet channel is arranged between the inner layer tube and the middle layer tube, and a cooling water return channel is arranged between the middle layer tube and the outer layer tube;
the inner layer pipe is a straight pipe, the pipe walls of the middle layer pipe and the outer layer pipe are correspondingly parallel, the outer layer pipe comprises a large taper pipe section, a variable taper pipe section, a small taper pipe section and an inverted taper pipe section which are sequentially arranged from the gun head to the gun body, the large taper pipe section comprises 1-3 taper pipes, the taper range of each taper pipe of the large taper pipe section is 1.5-3.5 degrees, and each taper of the large taper pipe section is gradually reduced from one end close to the gun head to one end close to the variable taper pipe section; the variable taper pipe section comprises 2-6 taper pipes, the taper range of each taper pipe of the variable taper pipe section is 20' -1.5 degrees, and each taper of the variable taper pipe section is gradually reduced from one end close to the large taper pipe section to one end close to the small taper pipe section; the small-taper pipe section comprises 1-3 taper pipes, the taper range of each taper pipe of the small-taper pipe section is 18' -1.2 degrees, and each taper of the small-taper pipe section is gradually reduced from one end close to the tapered pipe section to one end close to the inverted taper pipe section.
2. The self-desludging, long-life multi-taper lance of claim 1 wherein the length of the steep taper section is 0.5-3 m; the length of the variable taper pipe section is 0.5-4m, and the length of the small taper pipe section is 0.5-4 m; the length of the inverted cone pipe section is 0.3m-1 m.
3. The self-slagging, long-life multi-taper oxygen lance of claim 1 wherein the large taper pipe section, the variable taper pipe section, the small taper pipe section and the inverted taper pipe section are welded in sequence.
4. The self-desludging, long-life multi-taper oxygen lance of claim 1 wherein the lance tip is a copper-steel composite lance tip.
5. The multi-taper oxygen lance capable of automatically deslagging and having long service life according to claim 4, wherein the large taper pipe section of the outer layer pipe is welded to the steel part of the lance head, the middle layer pipe is spliced to the lance head, the inner layer pipe is hermetically connected to the lance head, and the inverted taper pipe section, the middle layer pipe and the inner layer pipe of the outer layer pipe are respectively welded to the lance body.
6. The self-detachable long-life multi-taper oxygen lance as claimed in claim 1, wherein a cladding layer is provided on the outer surface of the outer tube, and the thickness of the cladding layer is 0.2-5 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022292765.0U CN213507051U (en) | 2020-10-15 | 2020-10-15 | Multi-taper oxygen lance capable of automatically removing slag and having long service life |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022292765.0U CN213507051U (en) | 2020-10-15 | 2020-10-15 | Multi-taper oxygen lance capable of automatically removing slag and having long service life |
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| CN213507051U true CN213507051U (en) | 2021-06-22 |
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