CN211445799U - Molten iron pretreatment desulfurization spray gun - Google Patents
Molten iron pretreatment desulfurization spray gun Download PDFInfo
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- CN211445799U CN211445799U CN201922154903.6U CN201922154903U CN211445799U CN 211445799 U CN211445799 U CN 211445799U CN 201922154903 U CN201922154903 U CN 201922154903U CN 211445799 U CN211445799 U CN 211445799U
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Abstract
The utility model discloses a molten iron pretreatment desulfurization spray gun, include: a housing; the inner wall of the shell and the outer wall of the sleeve define a containing space; the refractory material piece is arranged in the accommodating space; the inner pipe is arranged in the sleeve, the inner pipe is a seamless steel pipe and is provided with a first channel, and the sleeve and the inner pipe define a second channel; the injection steel pipe is arranged at one end of the inner pipe and one end of the sleeve, the injection steel pipe is provided with an injection channel, the injection steel pipe is a seamless light pipe, and the injection steel pipe is provided with a main nozzle and a side nozzle which are communicated with each other; the bottom spray pipe is connected with the main spray pipe through threads and welding, and the wall thickness of the bottom spray pipe is larger than or equal to that of the main spray pipe. According to the utility model discloses molten iron pretreatment of desulfurization spray gun can avoid passivation lime and powdered magnesium to take place to block in inner tube and jetting steel pipe, and then can promote reliability and the life of molten iron pretreatment of desulfurization spray gun work.
Description
Technical Field
The utility model belongs to the technical field of the desulfurization technique and specifically relates to a molten iron pretreatment desulfurization spray gun is related to.
Background
The composite blowing desulfurization technology for molten iron of POLYSIUS in some domestic steel mills is basically widely applied and gradually becomes a bridge for connecting steel making and a blast furnace, so that a desulfurization spray gun reaches a very important position in the field of molten iron pretreatment, and the development and improvement of the desulfurization spray gun are increased at home and abroad. The technology adopts a cone fluidization blowing tank, and passivated lime and magnesium powder are mixed on line and then sprayed into a hot metal ladle through a spray gun, but the passivated lime and the magnesium powder are often blocked, so that normal blowing is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a molten iron pretreatment of desulfurization spray gun, molten iron pretreatment of desulfurization spray gun has the advantage that is difficult for blockking up and long service life.
According to the utility model discloses molten iron pretreatment desulphurization spray gun, include: a housing; the sleeve is arranged in the shell, and an accommodating space is defined by the inner wall of the shell and the outer wall of the sleeve; a refractory material piece disposed within the containment space; the inner pipe is arranged in the sleeve, the inner pipe is a seamless steel pipe and is provided with a first channel, and a second channel is defined by the sleeve and the inner pipe; the injection steel pipe is arranged at one end of the inner pipe and one end of the sleeve, the injection steel pipe is provided with an injection channel, the injection channel is communicated with the first channel and the second channel, the injection steel pipe is a seamless light pipe, and the injection steel pipe is provided with a main nozzle and a side nozzle which are communicated with each other; the bottom spray pipe is connected with the main spray pipe through threads and welding, and the wall thickness of the bottom spray pipe is larger than or equal to that of the main spray pipe.
According to the utility model discloses molten iron pretreatment desulphurization spray gun through setting inner tube and jetting steel pipe to seamless steel pipe, passivation lime and powdered magnesium when flowing through inner tube and jetting steel pipe, flow resistance is less relatively, can promote the smooth and easy nature of passivation lime and powdered magnesium to avoid passivation lime and powdered magnesium to take place to block in inner tube and jetting steel pipe, and then can promote reliability and the life of molten iron pretreatment desulphurization spray gun work.
According to some embodiments of the utility model, molten iron pretreatment desulphurization lance still includes: the first bracket is arranged at one end of the inner pipe, one end of the first bracket is connected with the outer wall of the inner pipe, and the other end of the first bracket is connected with the inner peripheral wall of the sleeve; the second support is arranged at the other end of the inner pipe, one end of the second support is connected with the outer wall of the inner pipe, and the other end of the second support is connected with the inner peripheral wall of the sleeve.
In some embodiments of the present invention, the molten iron pretreatment desulfurization spray gun further comprises: the third support is arranged in the middle of the first support and the second support in the length direction of the inner pipe, one end of the third support is connected with the outer wall of the inner pipe, and the other end of the third support is connected with the inner peripheral wall of the sleeve.
According to some embodiments of the invention, the main nozzle has an inner diameter of 20mm and the side nozzle has an inner diameter of 10 mm.
According to some embodiments of the utility model, be equipped with the anchor component on the sheathed tube outer wall, the anchor component includes first linkage segment and second linkage segment, the one end of first linkage segment with the one end of second linkage segment and sheathed tube outer wall connection, first linkage segment with the second linkage segment is each other the contained angle.
In some embodiments of the present invention, the anchoring member is a plurality of anchoring members, and the plurality of anchoring members are provided at intervals in a length direction of the sleeve.
In some embodiments of the present invention, the distance between two adjacent anchoring members is 40mm-60 mm.
In some embodiments of the present invention, the first connecting section and the second connecting section of two adjacent anchoring members are perpendicular.
In some embodiments of the present invention, the cross-section of the first connection section and the second connection section is formed in a circle, and the diameter of the cross-section is d, and d satisfies: d is more than or equal to 8mm and less than or equal to 10 mm.
In some embodiments of the present invention, the length of the first connecting section and the second connecting section in the radial direction of the sleeve is L1, the thickness of the refractory material piece in the radial direction of the sleeve is L2, and satisfies: L1/L2 ═ 3/4.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of a partial structure of a molten iron pretreatment desulfurization lance according to an embodiment of the present invention;
fig. 2 is a schematic view of a first support of a molten iron pretreatment desulfurization lance according to an embodiment of the present invention;
fig. 3 is a top view of a first support of a molten iron pretreatment desulfurization lance according to an embodiment of the present invention;
fig. 4 is a schematic view of a molten iron pretreatment desulfurization lance according to an embodiment of the present invention.
Reference numerals:
the desulfurization lances 100 are provided with a plurality of lances,
the outer casing 1, the sleeve 2,
a piece of refractory material 3, an inner tube 4, anchoring means 5,
a first connecting section 51, a second connecting section 52, a first bracket 6.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.
The molten iron pretreatment desulfurization lance 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
As shown in fig. 1 and 4, a molten iron pretreatment desulfurization lance 100 according to an embodiment of the present invention includes: the device comprises an outer shell 1, a sleeve 2, a refractory material piece 3, an inner pipe 4, a blowing steel pipe and a bottom spray pipe.
Specifically, as shown in fig. 1 and 4, the sleeve 2 is provided inside the casing 1, an inner wall of the casing 1 and an outer wall of the sleeve 2 define a housing space, and the refractory material piece 3 is provided inside the housing space. It can be understood that the desulfurization spray gun 100 needs frequent contact with high-temperature molten iron of about 1400 ℃, and in order to avoid the influence of the high-temperature molten iron on the structural strength and the service life of the molten iron pretreatment desulfurization spray gun 100, the refractory material piece 3 is arranged in the accommodating space, so that the working reliability of the desulfurization spray gun 100 can be ensured.
As shown in fig. 1 and 4, the inner pipe 4 is disposed inside the sleeve 2, the inner pipe 4 is a seamless steel pipe, the inner pipe 4 has a first passage, and the sleeve 2 and the inner pipe 4 define a second passage. Wherein the passivated lime and magnesium powder flows along a first channel and the compressed air flows along a second channel. Through setting inner tube 4 to seamless steel pipe, passivation lime and powdered magnesium when the first passageway of flowing through, flow resistance is less relatively, can promote the smooth and easy nature of passivation lime and powdered magnesium to avoid passivation lime and powdered magnesium to take place to block in the first passageway, and then can promote the reliability and the life of 100 work of molten iron preliminary treatment desulfurization spray guns.
The injection steel pipe is arranged at one end of the inner pipe 4 and one end of the sleeve 2, the injection steel pipe is provided with an injection channel, the injection channel is communicated with the first channel and the second channel, the injection steel pipe is a seamless light pipe, and the injection steel pipe is provided with a main nozzle and a side nozzle which are communicated with each other. The passivated lime, the magnesium powder and the compressed air are mixed in the blowing channel. Through setting the jetting steel pipe to seamless steel pipe, passivation lime and powdered magnesium are when the jetting passageway of flowing through, and flow resistance is less relatively, can promote the smooth and easy nature of passivation lime and powdered magnesium to avoid passivation lime and powdered magnesium to take place to block in the jetting passageway, and then can promote the reliability and the life of molten iron pretreatment desulfurization spray gun 100 work.
The bottom spray pipe is connected with the main spray pipe through threads and welding, and the wall thickness of the bottom spray pipe is more than or equal to that of the main spray pipe. It is understood that the wall thickness of the bottom nozzle may be greater than or equal to the wall thickness of the main nozzles. The bottom nozzle and the main nozzle are connected through threads and welding to improve the thermal shock stability of the desulfurization spray gun 100.
For example, in one example of the present invention, the bottom nozzle is attached to the main nozzle by a threaded and welded horizontal "in-line" symmetrical connection.
Experimental research discovers that, according to the utility model discloses molten iron preliminary treatment desulfurization spray gun 100, life is higher, and the maximum life reaches nearly 200 times, can spout more than 1500min material, reaches more than 3 times of traditional spray gun life-span.
According to the utility model discloses molten iron pretreatment desulphurization spray gun 100 through setting inner tube 4 and jetting steel pipe to seamless steel pipe, passivation lime and powdered magnesium are when flowing through inner tube 4 and jetting steel pipe, and flow resistance is less relatively, can promote the smooth and easy nature of passivation lime and powdered magnesium to avoid passivation lime and powdered magnesium to take place to block in inner tube 4 and jetting steel pipe, and then can promote reliability and the life of molten iron pretreatment desulphurization spray gun 100 work.
According to some embodiments of the present invention, as shown in fig. 2, 3 and 4, the molten iron pretreatment desulfurization lance 100 further includes: first support 6 and second support, first support 6 is established in the one end of inner tube 4, the one end of first support 6 and the outer wall connection of inner tube 4, the other end of first support 6 and the internal perisporium of sleeve pipe 2 are connected, the second support is established at the other end of inner tube 4, the one end of second support and the outer wall connection of inner tube 4, the other end of second support and the internal perisporium of sleeve pipe 2 are connected. It can be understood that the passivation lime, the magnesium powder and the compressed air are injected simultaneously, so that great vibration can be caused to the inner pipe 4, the connection strength of the inner pipe 4 and the sleeve 2 can be improved by arranging the first support 6 and the second support, and the working reliability of the inner pipe 4 and the sleeve 2 is ensured.
In an embodiment of the present invention, the hot metal pretreatment desulfurization spray gun 100 further includes a third support, and the third support is disposed at an intermediate position between the first support 6 and the second support in the length direction of the inner tube 4, one end of the third support is connected to the outer wall of the inner tube 4, and the other end of the third support is connected to the inner peripheral wall of the sleeve 2. Thereby, the third bracket can improve the connection strength of the inner pipe 4 and the sleeve 2 between the first bracket 6 and the second bracket, thereby further improving the reliability of the connection of the inner pipe 4 and the sleeve 2.
In one embodiment of the present invention, the main nozzle has an inner diameter of 20mm, and the side nozzle has an inner diameter of 10 mm. Therefore, the complexity of the main spray pipe and the side spray pipe can be simplified, the manufacturing difficulty of the main spray pipe and the side spray pipe is reduced, the production efficiency of the main spray pipe and the side spray pipe is improved, and the production cost of the main spray pipe and the side spray pipe is reduced.
According to some embodiments of the present invention, as shown in fig. 4, the anchoring member 5 is disposed on the outer wall of the casing 2, the anchoring member 5 includes a first connection section 51 and a second connection section 52, one end of the first connection section 51 is connected to one end of the second connection section 52 and the outer wall of the casing 2, and the first connection section 51 and the second connection section 52 form an included angle with each other. The anchoring member 5 has fixing and limiting effects on the refractory 3, and the thermal shock resistance of the refractory 3 can be improved by fixing the refractory 3 through the arrangement of the first connecting section 51 and the second connecting section 52 which form an angle with each other. Specifically, in one example of the present invention, the anchor member 5 is formed in a V shape.
In an embodiment of the present invention, as shown in fig. 4, the anchor member 5 is plural, and the plural anchor members 5 are provided at intervals in the length direction of the casing 2. Thus, the refractory 3 can be fixed at different positions by the plurality of anchor members 5, so that the thermal shock resistance of the refractory 3 can be further improved.
In one embodiment of the present invention, as shown in fig. 4, the distance between two adjacent anchoring members 5 is 40mm to 60 mm. Thereby, the thermal shock resistance of the refractory material piece 3 can be further improved. For example, in one example of the invention, the spacing between two adjacent anchor members 5 is 40mm, 42mm, 44mm, 46mm, 48mm, 50mm, 52mm, 54mm, 56mm, 58mm or 60 mm. Specifically, the distance between two adjacent anchor members 5 may be set according to the size of the molten iron pretreatment desulfurization lance 100.
In one embodiment of the present invention, as shown in fig. 4, the first connecting section 51 and the second connecting section 52 of two adjacent anchor members 5 are perpendicular. Therefore, the fixing effect of the two adjacent anchoring members 5 on the refractory material piece 3 can be improved, and the thermal shock resistance of the refractory material piece 3 can be further improved.
In one embodiment of the present invention, the cross section of the first connection section 51 and the second connection section 52 is formed in a circular shape, and the diameter of the cross section is d, and d satisfies: d is more than or equal to 8mm and less than or equal to 10 mm. Thereby, the first connection section 51 and the second connection section 52 can be ensured to have a strong structural strength. For example, in one example of the invention, the diameter of the cross-section is 8.2mm, 8.4mm, 8.6mm, 8.8mm, 9mm, 9.2mm, 9.4mm, 9.6mm, 9.8mm or 10 mm. Specifically, the diameter of the cross section may be set according to the size of the molten iron pretreatment desulfurization lance 100 and the specific mechanism of the refractory material piece 3.
In an embodiment of the present invention, as shown in fig. 4, the length of the first connecting section 51 and the second connecting section 52 in the radial direction of the casing 2 is L1, the thickness of the refractory material piece 3 in the radial direction of the casing 2 is L2, and satisfies: L1/L2 ═ 3/4. Thereby, the fixing effect of the first connecting section 51 and the second connecting section 52 to the refractory 3 can be improved, so that the thermal shock resistance of the refractory 3 can be further improved.
For example, in one example of the present invention, the anchoring members 5 are "V" shaped members, each made of twisted steel bar with a diameter of Φ 8-10mm, and the height of the anchoring members 5 is 3/4 of the material thickness, the transverse distance is 50mm, the anchoring members are perpendicular to the direction of the "V" shaped members of the adjacent row, and the anchoring members are arranged at an angle of 90 ° with the adjacent members of the adjacent row. In addition, a thin steel bar with the diameter of 6-8mm and wound for 1-2 circles is welded at the top end of the V-shaped anchoring member 5 from the bottom end to the top end, so that the thermal shock resistance of the refractory material is improved.
The refractory material piece 3 for the molten iron pretreatment desulfurization lance 100 according to the embodiment of the present invention is described below with reference to the accompanying drawings.
According to the utility model discloses a refractory material piece 3 for molten iron pretreatment of desulfurization spray gun 100, molten iron pretreatment of desulfurization spray gun 100 are above-mentioned molten iron pretreatment of desulfurization spray gun 100, and refractory material piece 3 includes: capacitor mullite particles, mullite micropowder, tabular corundum fine powder, activated alumina micropowder, andalusite particles, andalusite fine powder, silica micropowder, pure calcium aluminate cement, a water reducing agent, an explosion-proof agent, explosion-proof fibers and stainless steel fibers.
It should be noted that the environment of use of the refractory material 3 is mainly that molten iron is rapidly and frequently inserted at 1400 ℃, or the refractory material is subjected to erosion caused by oxygen blowing from the molten iron, and therefore, the refractory material is selected, and not only the sinterability, thermal shock resistance and molten iron erosion resistance of the refractory material in the environment are considered, but also more serious oxygen erosion caused to the lance body by oxygen blowing sometimes is considered.
The capacitor mullite powder, the mullite micropowder, the tabular corundum fine powder, the activated alumina micropowder, the andalusite powder, the andalusite fine powder, the silica micropowder, the pure calcium aluminate cement, the water reducing agent, the explosion-proof fiber and the stainless steel fiber have the advantages of strong fire resistance and low impurity content, are excellent in sintering property, thermal shock resistance and molten iron scouring resistance at 1400 ℃, and have good scouring and erosion resistance.
From this, can promote the bulk strength of refractory material piece 3, avoid the problem that the crackle appears in refractory material piece 3, can balance and reduce the line type collision and the shrink of desulfurization spray gun 100 simultaneously, in addition, can also promote the explosion-proof crack nature of refractory material piece 3.
The electrofused mullite can be produced by carrying out light burning on three-grade high-alumina boehmite-kaolinite produced in Hunan and then sorting and electrofusing.
According to the utility model discloses a refractory material spare 3 for molten iron pretreatment desulphurization spray gun 100, electric capacity mullite granule, mullite miropowder, platelike corundum farine, active alumina miropowder, andalusite granule, andalusite farine, silica micropowder, pure calcium aluminate cement, the water-reducing agent, the explosion-proof agent, explosion-proof fiber and stainless steel fiber, can promote refractory material spare 3's bulk strength, avoid refractory material spare 3 to appear the problem of crackle, can balance and reduce desulphurization spray gun 100's line type collision and shrink simultaneously, in addition, can also promote refractory material spare 3's explosion-proof nature.
According to some embodiments of the present invention, the capacitor mullite grains include grains having a diameter of less than 1mm, grains having a diameter of 1-3mm, grains having a diameter of 3-5mm, and grains having a diameter of 10-15 mm. Thus, the fire resistance, thermal shock resistance, and erosion resistance of the desulfurization lance 100 may be further improved, so that the service life of the desulfurization lance 100 may be extended.
In some embodiments of the invention, the ratio by weight of the capacitive mullite grains having a diameter of less than 1mm to the refractory material 3 is from 12 to 15%; the weight ratio of the capacitance mullite grains with the diameter of 1-3mm to the refractory material piece 3 is 6-10 percent; the weight ratio of the capacitance mullite grains with the diameter of 3-5mm to the refractory material piece 3 is 5-8 percent; the weight ratio of the capacitance mullite grains with the diameter of 10-15mm to the refractory material piece 3 is 15-25 percent. Thus, the fire resistance, thermal shock resistance, and erosion resistance of the desulfurization lance 100 can be further improved, and the service life of the desulfurization lance 100 can be further extended.
According to some embodiments of the invention, the andalusite particles comprise particles having a diameter smaller than 1mm and particles having a diameter comprised between 1 and 3 mm. Thereby, the line-type collision and shrinkage of the desulfurization lance 100 can be balanced and reduced, so that the lifespan of the desulfurization lance 100 can be extended.
In some embodiments of the present invention, the ratio of the andalusite particles having a diameter of less than 1mm to the refractory material 3 is 5-8% by weight, and the ratio of the andalusite particles having a diameter of 1-3mm to the refractory material 3 is 8-12% by weight. Thereby, the linear collision and contraction of the desulfurization lance 100 can be further balanced and reduced, so that the service life of the desulfurization lance 100 can be further extended.
According to some embodiments of the present invention, the weight ratio of the mullite micropowder to the refractory material 3 is 6-10%; the weight ratio of the tabular corundum fine powder to the refractory material piece 3 is 10-15%; the weight ratio of the activated alumina micro powder to the refractory material piece 3 is 3-8%; the weight ratio of the andalusite fine powder to the refractory material piece 3 is 5-8%; the weight ratio of the silicon micro powder to the refractory material piece 3 is 2-4%; the weight ratio of the pure calcium aluminate cement to the refractory material piece 3 is 2.5-4.5%; the weight ratio of the water reducing agent to the refractory material piece 3 is 0.1-0.2%; the weight ratio of the explosion-proof agent to the refractory material piece 3 is 0.01-0.03%; the weight ratio of the explosion-proof fiber to the refractory material piece 3 is 0.05-0.2%; the weight ratio of the stainless steel fiber to the refractory material 3 is 2-4%.
From this, can further promote the bulk strength of refractory material piece 3, further avoid the problem that the crack appears in refractory material piece 3, can further balance and reduce the line type collision and the shrink of desulfurization spray gun 100 simultaneously, in addition, can also further promote the explosion-proof crack nature of refractory material piece 3.
Specifically, in one example of the present invention, 60% mullite micropowder (MU72) may be replaced with corundum micropowder (GS-86); 50% of the fused mullite grains are replaced by tabular corundum grains (35%) with the grain diameter of less than 5mm and special-grade high-alumina bauxite grains (5-3mm) (10-15%).
For example, in another example of the present invention, the refractory 3 may further comprise 100mm long refractory grade organic fibers to ensure a certain air tightness of the refractory 3 of the desulfurization lance 100. It is also possible to use aluminum metal powder as a reinforcing explosion-proof agent to improve the explosion-proof properties of the refractory material piece 3. The refractory material piece 3 can also be added with stainless steel fiber 446# to improve the overall strength of the refractory material and reduce the crack strength of the refractory material of the gun body. The active alumina micro powder is prepared from 2-5 μm of raw material with proper activity.
The utility model discloses an in the example, the rifle body shaping mode of the refractory material piece 3 of desulfurization spray gun 100 also can use forming die to fix on elastic platform to with the vibrating motor of rifle body both sides hanging vibrate simultaneously from top to bottom with the same width of cloth when pouring vibration desulfurization spray gun 100, guarantee the organizational structure homogeneity of refractory material piece 3, avoid the granule segregation.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
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 (10)
1. Molten iron pretreatment desulfurization spray gun, its characterized in that includes:
a housing;
the sleeve is arranged in the shell, and an accommodating space is defined by the inner wall of the shell and the outer wall of the sleeve;
a refractory material piece disposed within the containment space;
the inner pipe is arranged in the sleeve, the inner pipe is a seamless steel pipe and is provided with a first channel, and a second channel is defined by the sleeve and the inner pipe;
the injection steel pipe is arranged at one end of the inner pipe and one end of the sleeve, the injection steel pipe is provided with an injection channel, the injection channel is communicated with the first channel and the second channel, the injection steel pipe is a seamless light pipe, and the injection steel pipe is provided with a main nozzle and a side nozzle which are communicated with each other;
the bottom spray pipe is connected with the main spray pipe through threads and welding, and the wall thickness of the bottom spray pipe is larger than or equal to that of the main spray pipe.
2. The molten iron pretreatment desulfurization lance of claim 1, further comprising:
the first bracket is arranged at one end of the inner pipe, one end of the first bracket is connected with the outer wall of the inner pipe, and the other end of the first bracket is connected with the inner peripheral wall of the sleeve;
the second support is arranged at the other end of the inner pipe, one end of the second support is connected with the outer wall of the inner pipe, and the other end of the second support is connected with the inner peripheral wall of the sleeve.
3. The molten iron pretreatment desulfurization lance according to claim 2, further comprising: the third support is arranged in the middle of the first support and the second support in the length direction of the inner pipe, one end of the third support is connected with the outer wall of the inner pipe, and the other end of the third support is connected with the inner peripheral wall of the sleeve.
4. The molten iron pretreatment desulfurization lance of claim 1, wherein the main nozzles have an inner diameter of 20mm and the side nozzles have an inner diameter of 10 mm.
5. The molten iron pretreatment desulfurization lance of claim 1, wherein an anchoring member is provided on an outer wall of the sleeve, the anchoring member comprises a first connecting section and a second connecting section, one end of the first connecting section is connected with one end of the second connecting section and the outer wall of the sleeve, and the first connecting section and the second connecting section are at an angle to each other.
6. The molten iron pretreatment desulfurization lance according to claim 5, wherein the anchor member is provided in plurality, and the plurality of anchor members are provided at intervals in a longitudinal direction of the sleeve.
7. The molten iron pretreatment desulfurization lance according to claim 6, wherein a distance between two adjacent anchor members is 40mm to 60 mm.
8. The molten iron pretreatment desulfurization lance of claim 6, wherein the first connection section and the second connection section of two adjacent anchor members are perpendicular.
9. The molten iron pretreatment desulfurization lance according to claim 5, wherein the first connection section and the second connection section are formed in a circular shape in cross section and have a diameter d that satisfies: d is more than or equal to 8mm and less than or equal to 10 mm.
10. The molten iron pretreatment desulfurization lance according to claim 5, wherein the first connection section and the second connection section have a length in a radial direction of the sleeve of L1, the refractory material piece has a thickness in the radial direction of the sleeve of L2, and satisfy: L1/L2 ═ 3/4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922154903.6U CN211445799U (en) | 2019-12-03 | 2019-12-03 | Molten iron pretreatment desulfurization spray gun |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922154903.6U CN211445799U (en) | 2019-12-03 | 2019-12-03 | Molten iron pretreatment desulfurization spray gun |
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| CN211445799U true CN211445799U (en) | 2020-09-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041146A (en) * | 2019-12-03 | 2020-04-21 | 莱芜钢铁集团新兴液气有限公司 | Refractory material piece and molten iron pretreatment desulfurization spray gun with same |
-
2019
- 2019-12-03 CN CN201922154903.6U patent/CN211445799U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041146A (en) * | 2019-12-03 | 2020-04-21 | 莱芜钢铁集团新兴液气有限公司 | Refractory material piece and molten iron pretreatment desulfurization spray gun with same |
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Granted publication date: 20200908 Termination date: 20211203 |