CN113061679A - Material distribution chute with double-layer composite high-temperature-resistant protective layer and manufacturing method thereof - Google Patents
Material distribution chute with double-layer composite high-temperature-resistant protective layer and manufacturing method thereof Download PDFInfo
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- CN113061679A CN113061679A CN202110418574.0A CN202110418574A CN113061679A CN 113061679 A CN113061679 A CN 113061679A CN 202110418574 A CN202110418574 A CN 202110418574A CN 113061679 A CN113061679 A CN 113061679A
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- 239000011241 protective layer Substances 0.000 title claims abstract description 141
- 238000009826 distribution Methods 0.000 title claims abstract description 78
- 239000010410 layer Substances 0.000 title claims abstract description 47
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 title claims description 23
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- 238000005192 partition Methods 0.000 claims description 34
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- 238000003466 welding Methods 0.000 claims description 20
- 238000004873 anchoring Methods 0.000 claims description 18
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- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 229910001220 stainless steel Inorganic materials 0.000 description 14
- 239000010935 stainless steel Substances 0.000 description 14
- 239000003034 coal gas Substances 0.000 description 11
- 229910052742 iron Inorganic materials 0.000 description 8
- 239000000571 coke Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000003628 erosive effect Effects 0.000 description 7
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- 230000015572 biosynthetic process Effects 0.000 description 2
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- 229910052593 corundum Inorganic materials 0.000 description 2
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- 230000035939 shock Effects 0.000 description 2
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/18—Bell-and-hopper arrangements
- C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
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- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The application discloses a distribution chute with a double-layer composite high-temperature-resistant protective layer and a manufacturing method of the distribution chute, relates to the technical field of blast furnace equipment, and solves the problem that when the distribution chute in the prior art is used, the chute body is easily burnt through, so that the whole distribution chute is scrapped. The distribution chute comprises a goose head body, a chute body, a first protective layer and a second protective layer; the goose head body is fixedly connected to one end of the groove body; wear-resistant lining plates are uniformly distributed on the inner side surface of the tank body, and a first protective layer and the second protective layer are arranged on the outer side surface of the tank body; the first protective layer is arranged in a region of the groove body, which is flushed by blast furnace gas, and the second protective layer is arranged on the lower surface of the first protective layer and covers the lower surface of the first protective layer; the area of the bath body flushed by blast furnace gas is positioned at one end of the bath body, where the goose head body is arranged. By adopting the distribution chute and the manufacturing method thereof, the service life of the distribution chute is prolonged, and the replacement frequency of the distribution chute is reduced.
Description
Technical Field
The application relates to the technical field of blast furnace equipment, in particular to a distribution chute with a double-layer composite high-temperature-resistant protective layer and a manufacturing method thereof.
Background
The distribution chute is an important device in the iron-making blast furnace, is arranged at the center of the top of the blast furnace, and is driven by other devices to rotate around the vertical axis of the blast furnace and can tilt around the horizontal axis so as to change the inclination angle. The material distributing chute can uniformly distribute the falling materials of iron ore, coke, sinter and the like in the blast furnace according to the requirement. The blast furnace material distribution chute is in a high-temperature working environment for a long time, the upper part of the blast furnace material distribution chute is strongly impacted by falling of materials to generate vibration, the lower part of the blast furnace material distribution chute is scoured by rising high-temperature coal gas with strong corrosivity, the instantaneous temperature of the high-temperature coal gas can reach 800 ℃, the chute body is easily burnt through, material distribution abnormity is caused, and the production of blast furnace iron making is seriously influenced.
At present, in order to solve the problems, the whole trough body of the distribution chute is generally covered with refractory materials, and by adopting the design, on one hand, the weight of the distribution chute exceeds the standard, and the service life of equipment for driving the distribution chute to rotate for distribution is influenced; on the other hand, the refractory material is easily stripped under the influence of the vibration generated by the blanking impact of the iron ore and the coke on the upper part and the action of erosive high-temperature gas scouring and the like on the lower part, and finally the protection of the trough body is lost, so that the trough body is burnt through, the whole distribution chute is scrapped, and the blast furnace stops blowing down and production is stopped.
Disclosure of Invention
The embodiment of the application solves the problem that the whole distribution chute is scrapped because the chute body is easily burnt through when the distribution chute in the prior art is used, prolongs the service life of the distribution chute and further reduces the replacement frequency of the distribution chute by providing the distribution chute with the double-layer composite high-temperature-resistant protective layer and the manufacturing method thereof.
The embodiment of the invention provides a distribution chute with a double-layer composite high-temperature-resistant protective layer, which comprises a goose head body, a chute body, a first protective layer and a second protective layer;
the goose head body is fixedly connected to one end of the groove body;
wear-resistant lining plates are uniformly distributed on the inner side surface of the tank body, and the first protective layer and the second protective layer are arranged on the outer side surface of the tank body;
the first protective layer is arranged in a blast furnace gas scouring area of the groove body, and the second protective layer is arranged on the lower surface of the first protective layer and covers the lower surface of the first protective layer;
the area of the tank body flushed by blast furnace gas is located at one end of the tank body, where the goose head body is installed.
Furthermore, the outer side surface of the groove body is provided with a baffle plate and a partition plate;
the baffle plates are arranged at two ends of the groove body in the area flushed by the blast furnace gas along the outer circumferential surface of the groove body;
the baffle plates are connected with the baffle plates at two ends and are arranged at intervals along the length direction of the baffle plates;
and uniformly filling steel fiber reinforced castable in an area defined by the baffle and the partition plate to form the first protective layer.
Furthermore, the steel fiber reinforced castable and the groove body are fixed through an anchoring piece.
Further, the second protective layer is welded to the separator.
Furthermore, the first protective layer is internally and uniformly provided with fixing blocks, and the second protective layer is fixed on the fixing blocks through bolts.
Furthermore, the height of the fixing block is consistent with that of the partition plate.
Still further, the protective cap is welded on the second protective layer and is positioned on the top of the bolt head of the bolt.
Furthermore, the area of the groove body which is flushed by blast furnace gas accounts for 45-50% of the surface area of the outer side of the groove body.
A manufacturing method of a distribution chute with a double-layer composite high-temperature-resistant protective layer comprises the following steps:
welding the baffle and the partition plate into a frame structure matched with the shape of the outer surface of the tank body, and welding the frame structure in a blast furnace gas scouring area of the outer surface of the tank body;
uniformly distributing anchoring parts in the frame structure, and welding the anchoring parts on the groove body;
pre-burying a fixed block in the frame structure;
uniformly filling the steel fiber reinforced castable into the frame structure, and ensuring that the filling height of the steel fiber reinforced castable is not higher than the height of the frame structure;
after the steel fiber reinforced castable is solidified, baking in a heating furnace;
welding a second protective layer with the bottom of the partition plate, and fixing the second protective layer on the fixing block through bolts;
and welding the protective cap at the position of the second protective layer where the bolt is arranged.
Furthermore, after the steel fiber reinforced castable is solidified, the steel fiber reinforced castable is baked in a heating furnace, and the baking process comprises the following steps:
heating to below 150 deg.C, and raising the temperature by 15 deg.C per hour until the temperature is raised to 150 deg.C;
keeping the temperature at 150 ℃ for 8 hours;
when the temperature is 150-250 ℃, the temperature is increased by 15 ℃ per hour until the temperature is increased to 250 ℃;
keeping the temperature at 250 ℃ for 5 hours;
cooling to 50 ℃ along with the furnace at 250 ℃ until the temperature is reduced to below 50 ℃, and discharging.
The technical scheme provided by the embodiment of the invention at least has the following technical effects or advantages:
the embodiment of the invention provides a distribution chute with a double-layer composite high-temperature-resistant protective layer, which is characterized in that a wear-resistant lining plate is arranged on the inner side surface of a chute body, a first protective layer is arranged in a region on the outer side surface of the chute body, which is flushed by blast furnace gas, a second protective layer is arranged on the lower surface of the first protective layer, and the second protective layer is ensured to completely cover the lower surface of the first protective layer, wherein the region flushed by the blast furnace gas is positioned at one end, provided with a goose head body, of the chute body. The position of the bottom of the distribution chute, which is eroded by high-temperature erosive coal gas, is protected by the double protective layers, so that the problem that the whole distribution chute is scrapped due to the fact that the chute body is easily burnt through when the distribution chute is used is effectively solved, the service life of the distribution chute is prolonged, and the replacement frequency of the distribution chute is reduced.
The embodiment of the invention provides a method for manufacturing a distribution chute with a double-layer composite high-temperature-resistant protective layer, which comprises the following steps of firstly, fixedly installing a frame structure which is formed by welding a baffle and a partition plate and is matched with the shape of the outer surface of a chute body in an area, flushed by blast furnace gas, of the outer surface of the chute body; then, pre-burying a fixing block in the space of the frame structure, uniformly distributing anchoring pieces in the space of the frame structure, and welding and fixing the anchoring pieces and the surface of the chute body of the distribution chute; then, filling steel fiber reinforced castable into the frame structure, and baking the steel fiber reinforced castable to enable the structure to be firm and form a first protective layer; then, fixedly mounting a second protective layer on the surface of the first protective layer, specifically in a welding and bolt fixing mode; and finally, arranging a protective cap at the position of the fixed bolt, and protecting the bolt through the protective cap to prevent the bolt from failing in advance. By adopting the manufacturing method, on one hand, the double-layer protective layer is arranged in the area, which is flushed by blast furnace gas, on the outer side surface of the trough body of the distribution chute, so that the manufacturing cost is reduced, and the weight of the distribution chute is effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Figure 1 is a front view of a distribution chute provided in an embodiment of the present application;
FIG. 2 is a side view of a distribution chute provided in an embodiment of the present application;
FIG. 3 is a partially enlarged schematic view of FIG. 1;
fig. 4 is a partially enlarged schematic view of fig. 2.
Icon: 1. a goose head body; 2. a baffle plate; 3. a first protective layer; 4. an anchoring member; 5. a tank body; 6. a fixed block; 7. a protective cap; 8. a bolt; 9. a wear-resistant lining plate; 10. a second protective layer; 11. a separator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
As shown in fig. 1, an embodiment of the present invention provides a distribution chute with a double-layer composite high temperature-resistant protective layer, including a gooseneck body 1, a chute body 5, a first protective layer 3, and a second protective layer 10; the goose head body 1 is fixedly connected with one end of the groove body 5; the inner side surface of the groove body 5 is uniformly distributed with wear-resistant lining plates 9, and the outer side surface of the groove body 5 is provided with a first protective layer 3 and a second protective layer 10; the first protective layer 3 is arranged in a blast furnace gas scouring area of the groove body 5, and the second protective layer 10 is arranged on the lower surface of the first protective layer 3 and covers the lower surface of the first protective layer 3; the area of the bath body 5 which is flushed by the blast furnace gas is located at one end of the bath body 5 where the gooseneck body 1 is arranged.
The embodiment of the invention provides a distribution chute with a double-layer composite high-temperature-resistant protective layer, wherein a wear-resistant lining plate 9 is arranged on the inner side surface of a chute body 5, a first protective layer 3 is arranged in a region on the outer side surface of the chute body 5, which is flushed by blast furnace gas, a second protective layer 10 is arranged on the lower surface of the first protective layer 3, and the second protective layer 10 is ensured to completely cover the lower surface of the first protective layer 3, wherein the region flushed by the blast furnace gas is positioned at one end, provided with a goose head body 1, of the chute body 5. The position of the bottom of the distribution chute, which is eroded by high-temperature erosive coal gas, is protected by the double protective layers, so that the problem that the whole distribution chute is scrapped because the chute body 5 is easily burnt through when the distribution chute is used is effectively solved, the service life of the distribution chute is prolonged, and the replacement frequency of the distribution chute is reduced.
Specifically, two independent goose head bodies 1 are fixedly installed on two side faces of one end of the groove body 5 through bolts, and the installation positions of the bolts for fixing the goose head bodies 1 and the groove body 5 are raised by the aid of the design structure, so that the bolts are kept away from the highest temperature area in the furnace top. In addition, evenly lay wear-resisting welt 9 at the inboard surface of groove body 5, set up the slope of wear-resisting welt 9, and set up the cushion in the contained angle space of wear-resisting welt 9 and groove body 5, constitute the wearing layer jointly by cushion and wear-resisting welt 9, the wearing layer that becomes through wear-resisting welt 9 and cushion is in order to increase the thickness of groove body 5, when materials such as iron ore that falls, coke, sintering deposit strike groove body 5, can effectively reduce the strong impact that the material whereabouts brought, avoid groove body 5 to produce and vibrate, cause the cloth unusual.
In addition, in the embodiment, the second protection layer 10 completely covers the surface of the first protection layer 3, and the first protection layer 3 and the second protection layer 10 are disposed in the region of the lower surface of the bath body 5, which is flushed by the blast furnace gas, the region flushed by the blast furnace gas is mainly located at one end of the bath body 5 on which the gooseneck body 1 is mounted, meanwhile, the inner surface of the groove body 5 in the area can be impacted by the falling of the material, and the double-layer protective layer is arranged in the area, so that on one hand, the manufacturing cost is reduced, the weight of the distribution chute is effectively reduced, on the other hand, the double-layer protective layer can effectively prevent the distribution chute from vibrating due to the impact of iron ore and coke on the upper part to a falling point in the falling process, and the lower part has the scouring of the high-temperature coal gas with stronger erosion to the chute body 5, thereby effectively prolonging the service life of the distribution chute and prolonging the service life of the equipment for driving the distribution chute to carry out distribution operation.
As shown in fig. 2, the baffle 2 and the partition 11 are arranged on the outer side surface of the groove body 5; the baffle plates 2 are arranged at two ends of the groove body 5 in the area flushed by the blast furnace gas along the outer circumferential surface of the groove body 5; the baffle plates 11 are connected with the baffle plates 2 at two ends and are arranged at intervals along the length direction of the baffle plates 2; steel fiber reinforced casting materials are uniformly filled in the area enclosed by the baffle 2 and the partition plate 11 to form the first protective layer 3.
Specifically, through setting up baffle 2 and baffle 11 at the outside surface of groove body 5, set up baffle 2 at the regional both ends of receiving blast furnace gas to erode of groove body 5, and set up baffle 2 along the circumferential direction of groove body 5, the baffle 2 that will be located and receive the regional both ends of blast furnace gas to erode is connected through baffle 11, set up baffle 11 along the even interval of length direction of baffle 2, baffle 2 and baffle 11 constitute a frame construction, evenly fill steel fiber reinforcing pouring material in frame construction, make it form first protective layer 3. The first protective layer 3 blocks the high-temperature coal gas with strong corrosivity in the furnace top, so that the high-temperature coal gas is prevented from directly scouring the trough body 5 of the distribution chute, and the corrosion and oxidation of the high-temperature coal gas to the trough body 5 are effectively prevented.
Referring to fig. 1 and 3, in this embodiment, specifically, since the groove body 5 has a certain thickness, one end of the groove body 5, on which the goose head body 1 is mounted, is set to be a step-shaped structure, that is, the outer side surface of the end of the groove body 5, on which the goose head body 1 is mounted, is provided with a groove, the goose head body 1 is mounted in the groove, and the bottom surface of the goose head body 1 is flush with the outer surface of the groove body 5, so as to ensure that the first protection layer 3 can be smoothly and completely attached to the outer side surface of the groove body 5, and further ensure the stability and firmness of mounting the first. Wherein, the length of recess and the length phase-match of the goose head body 1 installation in groove body 5, the wearing layer (first wearing layer) that the cushion that is located the recess position and the 9 formation of wear-resisting welt then are a little higher than wearing layer (second wearing layer) of normal groove body department, because first wearing layer is a little higher than the second wearing layer, then partial material can drop earlier at first wearing layer at the whereabouts in-process, fall to the second wearing layer again, so can also play certain cushioning effect, can make the live time of 5 wearing layers of groove body more permanent. In specific installation, set up baffle 2 that is close to the first end of the goose head body in two baffles 2 in the position with the tip cushion looks parallel and level of 5 medial surfaces of cell body to make the top surface of this baffle 2 (the baffle 2 that is close to first end of the goose head body 1) be fixed in on the bottom surface of the goose head body 1, simultaneously, this baffle 2 is fixed mutually with the terminal surface of cell body 5, guarantees that the first protective layer 3 that forms can be complete to the cell body 5 receive the gaseous formation protection of blast furnace high temperature erosiveness scouring position. The baffle 2 at the other end is fixed on the other side of the part of the groove body 5 which is washed by the high-temperature erosive gas of the blast furnace.
Referring to fig. 1-4, the steel fiber reinforced casting material is fixed to the channel body 5 by means of an anchor 4.
In this embodiment, in order to guarantee the steadiness of installation between steel fiber reinforced castable and trough body 5, fix the steel fiber reinforced castable through anchor assembly 4, when the material fell and strike trough body 5, ensure that the steel fiber reinforced castable can not drop because of the shock that the impact produced.
Referring to fig. 2 and 4, the second protective layer 10 is welded to the separator 11.
In this embodiment, in the distribution chute in the use, because upper portion iron ore, the coke whereabouts is to the vibrations of blanking point impact production and the higher aggressive high temperature coal gas's of lower part erode, after long-time the use, must lead to the fact the harm to first protective layer 3, and weld through with second protective layer 10 and 11 bottoms of baffle, make second protective layer 10 and first protective layer 3 connect into a whole, can play a fine parcel guard action to the steel fibre reinforcing pouring material, the change cycle of distribution chute has effectively been delayed, its life has effectively been increased.
As shown in fig. 1 and 3, fixing blocks 6 are uniformly arranged in the first protective layer 3, and the second protective layer 10 is fixed on the fixing blocks 6 by bolts 8.
In this embodiment, in order to further guarantee the steadiness of second protective layer 10 installation on first protective layer 3, pre-buried fixed block 6 in the steel fiber reinforced castable to fixed block 6 drills and the tapping, punch at the position department that second protective layer 10 corresponds fixed block 6, fix second protective layer 10 on fixed block 6 through bolt 8. Through the double fixing (the bolt 8 is used for welding the fixing block 6 and the second protective layer 10 as well as the second protective layer 10 and the partition plate 11), the second protective layer 10 can well protect the first protective layer 3.
As shown in fig. 3, the height of the fixing block 6 coincides with the height of the partition 11.
In the embodiment, in practical application, the height of the fixing block 6 is set to be consistent with that of the partition board 11, so that the height of the fixing block 6 cannot be higher than that of the partition board 11, on one hand, the upper surface of the second protective layer 10 can be completely attached to the lower surface of the first protective layer 3 when the second protective layer is installed, no gap is reserved in the middle, and the protection effect is better; on the other hand, in order to facilitate the welding of the top surface of the second protective layer 10 with the bottom surface of the partition 11, the mounting stability is enhanced.
As an embodiment of the present embodiment, a stainless steel shield is used for the second protective layer 10.
Specifically, the second protective layer 10 is made of stainless steel protective plate, and the stainless steel is made of 06Cr18Ni11Ti, because 06Cr18Ni11Ti can effectively resist high-temperature corrosion oxidation in the temperature range of 400-900 ℃.
With reference to fig. 1 to 4, the distribution chute of the double-layer composite high temperature resistant protective layer further comprises a protective cap 7, and the protective cap 7 is welded on the second protective layer 10 and is located on top of the bolt head of the bolt 8.
In the embodiment, in order to avoid erosion of high-temperature gas in the furnace top to the bolt 8, the bolt 8 fails in advance, so that the second protective layer 10 falls off, the protective cap 7 is further installed on the top of the bolt head of the bolt 8, the protective cap 7 and the second protective layer 10 are welded, the second protective layer 10 is firmly arranged on the second protective layer 10, the bolt 8 is protected, and the service life of the distribution chute is further prolonged.
In addition, as shown in fig. 3, a wear liner 9 is welded to the inner surface of the tank body 5.
In this embodiment, in order to guarantee the steadiness of installation between wear-resisting welt 9 and the groove body 5, weld wear-resisting welt 9 in the inboard surface of groove body 5, when materials such as iron ore, coke, sintering deposit that fall strike groove body 5, can effectively reduce the strong impact that the material whereabouts brought, avoid groove body 5 to produce and vibrate, cause wear-resisting welt 9 and the separation of the inboard surface of groove body 5, and then cause cloth chute groove body 5 to perforate.
In practical application, the area of the groove body 5 which is flushed by blast furnace gas accounts for 45-50% of the surface area of the outer side of the groove body 5.
Under the general condition, current distribution chute can not set up the inoxidizing coating at the lower surface that receives blast furnace gas to erode, perhaps can be with 5 external surfaces of cell body full inoxidizing coatings, and refractory material receives the vibrations that the blanking of upper portion iron ore and coke is strikeed the production and the influence that the lower part has effects such as aggressive high temperature coal gas erodees, peels off easily, loses the protection to cell body 5, and then can cause cell body 5 to be burnt through, leads to whole distribution chute to scrap. In this embodiment, the protective layer is only arranged in the area, which is flushed by the blast furnace gas, of the outer side surface of the tank body 5, specifically, the area, which is flushed by the blast furnace gas, of the tank body 5 accounts for 45% -50% of the surface area of the outer side of the tank body 5, because the tank body 5 is of a semi-cylindrical structure, the area, which is mainly flushed by the blast furnace gas, is located in the area, which is 45% -50% of one end of the outer side surface of the semi-cylindrical structure, therefore, only the double-layer protective layer is arranged on the outer surface of the tank body 5 in the area, the manufacturing cost is greatly reduced, meanwhile, the quality of the distribution chute is also reduced, and further the service life of equipment for driving the.
A manufacturing method of a distribution chute with a double-layer composite high-temperature-resistant protective layer comprises the following steps:
the baffle 2 and the baffle 11 are welded into a frame structure matched with the shape of the outer surface of the bath body 5, and the frame structure is welded in the area of the outer surface of the bath body 5 which is flushed by the blast furnace gas.
The baffle 2 and the baffle 11 are welded into a frame structure matched with the shape of the outer surface of the tank body 5, and the frame structure is welded on the outer surface of the tank body 5, so that the frame structure can cover the blanking point of the inner surface material on the upper part of the tank body 5 and the area of the outer surface of the lower part of the tank body 5 flushed by the blast furnace gas. Specifically, baffle 2 sets up to circular-arc, its and the half cylinder column structure phase-match of groove body 5, and with baffle 2 setting at the both ends that receive blast furnace gas to erode the region, and through baffle 2 at 11 intercommunication both ends, along the length direction of baffle 2, baffle 11 evenly sets up on baffle 2, and the both ends welding of every baffle 11 is on baffle 2, and wherein, baffle 2 welding is at 5 lower surfaces of groove body, constitutes this frame construction by baffle 11 and baffle 2 jointly.
The anchoring elements 4 are uniformly distributed in the frame structure, and the anchoring elements 4 are welded on the groove body 5.
Specifically, according to the distance of 150mm multiplied by 150mm, the anchoring pieces 4 are uniformly distributed in a frame structure formed by the partition plate 11 and the baffle plate 2, and each anchoring piece 4 is welded with the trough body 5 respectively, so that the steel fiber reinforced castable is connected with the distribution chute stably. In addition, the asphalt paint is coated on the surface of the anchoring part 4, so that the anchoring part 4 is prevented from being oxidized and corroded, the effect of protecting the anchoring part 4 is achieved, and the protection effect of the protective layer on the distribution chute body 5 is further ensured.
And a fixed block 6 is embedded in the frame structure.
Specifically, before pre-buried fixed block 6, process fixed block 6 earlier, drill fixed block 6, then carry out the tapping to guarantee the tapping degree of depth, the one side orientation of the fixed block 6 that will take drilling keeps away from the side of groove body 5.
The steel fiber reinforced castable is uniformly filled in the frame structure, and the filling height of the steel fiber reinforced castable is not higher than the height of the frame structure.
The main component of the steel fiber reinforced castable is Al2O3And CoO, and the protective layer filled by the CoO has higher strength, better toughness and better thermal shock stability, and in addition, has more excellent anti-stripping property and wear resistance.
And after the steel fiber reinforced castable is solidified, baking in a heating furnace.
And welding the second protective layer 10 with the bottom of the partition plate 11, and fixing the second protective layer 10 on the fixing block 6 through the bolt 8.
The partition plate 11, the baffle plate 2, the protective cap 7, the fixing block 6, the anchoring piece 4 and the bolt 8 are all made of stainless steel 06Cr18Ni11Ti, and the stainless steel 06Cr18Ni11Ti can effectively resist high-temperature corrosion oxidation within the range of 400-900 ℃, so that the stainless steel 06Cr18Ni11Ti is used as raw materials of the partition plate 11, the baffle plate 2, the protective cap 7, the fixing block 6, the anchoring piece 4 and the bolt 8, a good protection effect can be achieved on the distribution chute, namely, the steel fiber reinforced castable can be protected from being damaged, and the service life of the distribution chute can be further prolonged.
In addition, the upper surface of second protective layer 10 and 11 lower surfaces of baffle carry out welded fastening, simultaneously, the position that corresponds the drilling of fixed block 6 at second protective layer 10 is marked line and is joined in marriage the drilling again, passes the hole on second protective layer 10 and fixes on the screw hole of fixed block 6 with bolt 8, realizes the dual fixed to second protective layer 10, effectively strengthens second protective layer 10 installation stability, and then guarantees the effective protection of second protective layer 10 to first protective layer 3.
A protective cap 7 is welded to the second protective layer 10 at the position where the bolt 8 is provided.
The stainless steel protective cap 7 is used for protecting the stainless steel bolt 8, the bolt 8 can be prevented from failing in advance under the scouring of high-temperature corrosive gas, the second protective layer 10 is further caused to loosen, the second protective layer 10 is caused to fall off, the stainless steel protective cap 7 is used for protecting the stainless steel bolt 8, and the service life of the distribution chute can be prolonged. In this embodiment, the second protective layer 10 is a stainless steel protective plate.
As a further improvement of this embodiment, after the steel fiber reinforced castable is solidified, the steel fiber reinforced castable is baked in a heating furnace, and the baking process includes the following steps:
heating to below 150 deg.C, and raising the temperature by 15 deg.C per hour until the temperature is raised to 150 deg.C.
Keeping the temperature at 150 ℃ for 8 hours.
When the temperature is 150-250 ℃, the temperature is raised by 15 ℃ per hour until the temperature is raised to 250 ℃.
Keeping the temperature at 250 ℃ for 5 hours.
Cooling to 50 ℃ along with the furnace at 250 ℃ until the temperature is reduced to below 50 ℃, and discharging. In the step, in the process of cooling from 250 ℃ to 50 ℃ along with the furnace, the temperature reduction per hour is required to be ensured to be less than 25 ℃, the cooling speed is ensured not to be too fast or too slow, the stainless steel protective plate is taken out of the furnace when the temperature is reduced to below 50 ℃, and the stainless steel protective plate, namely the upper surface (top surface) of the second protective layer 10 and the lower surface (bottom surface) of the partition plate 11 are welded once after the stainless steel protective plate is taken out of the furnace. In this embodiment, the structure of the partition 11 may be an "L" shaped structure, the bottom edge of the "L" shaped structure is disposed downward, and the partitions 11 located on both sides of the baffle 2 are symmetrically disposed about the center of the baffle 2.
In this embodiment, the main component of the steel fiber reinforced castable is Al2O3And CoO, which withstands a maximum service temperature of 1200 ℃. When the steel fiber reinforced castable is uniformly filled in the frame structure, the filling height of the steel fiber reinforced castable is ensured not to be higher than the height of the partition plate 11, and it is noted that when the steel fiber reinforced castable is filled, the steel fiber reinforced castable is ensured to be uniformly filled in the frame structure consisting of the baffle plate 2 and the partition plate 11, because the fixed block 6 is also pre-embedded in the frame structure, and the height of the fixed block 6 is consistent with that of the partition plate 11, when the filling height of the steel fiber reinforced castable is higher than that of the partition plate 11, the fixed block 6 cannot be tightly fixed with the second protective layer 10, and further the probability that the second protective layer 10 falls off is increased, therefore, when the steel fiber reinforced castable is filled, the filling height of the steel fiber reinforced castable cannot be higher than that of the partition plate 11. After the steel fiber reinforced castable is filled and solidified, the process is adopted for baking, and through the baking process for the steel fiber reinforced castable, the first protective layer 3 can be ensured to effectively prevent high-temperature coal gas in the furnace top from scouring and eroding the trough body 5 of the distribution chute.
In addition, in this embodiment, the connection between the partition plate 11 and the baffle plate 2, the partition plate 11 and the tank body 5, the connection between the baffle plate 2 and the tank body 5, the connection between the anchoring member 4 and the tank body 5, and the connection between the second protective layer 10 and the partition plate 11 are preferably connected by a welding fixing method, on one hand, the welding connection performance is good, two parts to be connected can be stably combined, and the purposes of reducing quality, saving materials and optimizing resources are achieved; on the other hand, the welding structure has high rigidity and good integrity, and is easy to ensure air tightness and water tightness, wide in adaptability and easy to realize.
The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.
Claims (10)
1. A material distribution chute with a double-layer composite high-temperature-resistant protective layer is characterized by comprising a goose head body (1), a chute body (5), a first protective layer (3) and a second protective layer (10);
the goose head body (1) is fixedly connected to one end of the groove body (5);
wear-resistant lining plates (9) are uniformly distributed on the inner side surface of the groove body (5), and the first protective layer (3) and the second protective layer (10) are arranged on the outer side surface of the groove body (5);
the first protective layer (3) is arranged in a blast furnace gas scouring area of the groove body (5), and the second protective layer (10) is arranged on the lower surface of the first protective layer (3) and covers the lower surface of the first protective layer (3);
the area of the groove body (5) flushed by blast furnace gas is located at one end of the groove body (5) where the goose head body (1) is installed.
2. The distribution chute with the double-layer composite high-temperature-resistant protection layer as claimed in claim 1, characterized in that the baffle (2) and the partition (11) are arranged on the outer surface of the chute body (5);
the baffle plates (2) are arranged at two ends of a blast furnace gas scouring area of the groove body (5) along the outer circumferential surface of the groove body (5);
the baffle plates (11) are connected with the baffle plates (2) at two ends and are arranged at intervals along the length direction of the baffle plates (2);
and uniformly filling steel fiber reinforced castable into an area enclosed by the baffle (2) and the partition (11) to form the first protective layer (3).
3. The distribution chute of the double-layer composite refractory protective layer according to claim 2, characterized in that the steel fiber reinforced castable is fixed with the chute body (5) by means of an anchor (4).
4. The distribution chute of a double-layer composite refractory protective layer according to claim 2, characterized in that the second protective layer (10) is welded to the partition (11).
5. The distribution chute of the double-layer composite high-temperature-resistant protective layer according to claim 4, characterized in that fixing blocks (6) are uniformly arranged in the first protective layer (3), and the second protective layer (10) is fixed on the fixing blocks (6) through bolts (8).
6. The distribution chute with the double-layer composite high-temperature-resistant protection layer as claimed in claim 5, characterized in that the height of the fixing block (6) is the same as the height of the partition (11).
7. The distribution chute of a double-layer composite high temperature resistant protective layer according to claim 5, characterized in that it further comprises a protective cap (7), said protective cap (7) being welded to said second protective layer (10) and being positioned on top of the head of the bolt (8).
8. The distribution chute with the double-layer composite high-temperature-resistant protection layer as claimed in claim 1, characterized in that the area of the chute body (5) which is flushed by blast furnace gas accounts for 45-50% of the surface area of the outer side of the chute body (5).
9. A method for manufacturing a distribution chute with a double-layer composite high-temperature-resistant protective layer, which uses the distribution chute with the double-layer composite high-temperature-resistant protective layer as claimed in any one of claims 1 to 8, and is characterized by comprising the following steps:
welding the baffle (2) and the partition (11) into a frame structure matched with the shape of the outer surface of the tank body (5), and welding the frame structure in a blast furnace gas scouring area of the outer surface of the tank body (5);
anchoring pieces (4) are uniformly distributed in the frame structure, and the anchoring pieces (4) are welded on the groove body (5);
pre-burying the fixing block (6) in the frame structure;
uniformly filling the steel fiber reinforced castable into the frame structure, and ensuring that the filling height of the steel fiber reinforced castable is not higher than the height of the frame structure;
after the steel fiber reinforced castable is solidified, baking in a heating furnace;
welding a second protective layer (10) with the bottom of the partition plate (11), and fixing the second protective layer (10) on the fixing block (6) through a bolt (8);
and welding a protective cap (7) at the position of the second protective layer (10) where the bolt (8) is arranged.
10. The method for manufacturing the distribution chute with the double-layer composite high-temperature-resistant protective layer according to claim 9, wherein the steel fiber reinforced castable is solidified and then baked in a heating furnace, and the baking process comprises the following steps:
heating to below 150 deg.C, and raising the temperature by 15 deg.C per hour until the temperature is raised to 150 deg.C;
keeping the temperature at 150 ℃ for 8 hours;
when the temperature is 150-250 ℃, the temperature is increased by 15 ℃ per hour until the temperature is increased to 250 ℃;
keeping the temperature at 250 ℃ for 5 hours;
cooling to 50 ℃ along with the furnace at 250 ℃ until the temperature is reduced to below 50 ℃, and discharging.
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| CN202110418574.0A CN113061679A (en) | 2021-04-19 | 2021-04-19 | Material distribution chute with double-layer composite high-temperature-resistant protective layer and manufacturing method thereof |
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| CN202110418574.0A CN113061679A (en) | 2021-04-19 | 2021-04-19 | Material distribution chute with double-layer composite high-temperature-resistant protective layer and manufacturing method thereof |
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| CN205839051U (en) * | 2016-08-05 | 2016-12-28 | 高利 | Wear-resistant fabric chute |
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| CN1102439A (en) * | 1993-08-25 | 1995-05-10 | 保罗·沃思有限公司 | Distribution chute for bulk material |
| CN201232066Y (en) * | 2008-07-29 | 2009-05-06 | 湖南华菱湘潭钢铁有限公司 | Distributing chute for blast furnace |
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