CN217600761U - Prefabricated part structure of blast furnace tapping main channel cover impact area - Google Patents
Prefabricated part structure of blast furnace tapping main channel cover impact area Download PDFInfo
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- CN217600761U CN217600761U CN202221904379.5U CN202221904379U CN217600761U CN 217600761 U CN217600761 U CN 217600761U CN 202221904379 U CN202221904379 U CN 202221904379U CN 217600761 U CN217600761 U CN 217600761U
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Abstract
The utility model relates to a prefabricated part structure of a blast furnace tapping main ditch cover impact area, wherein the prefabricated part is an arch-shaped component spliced by three prefabricated parts, namely a top prefabricated part, a left prefabricated part and a right prefabricated part, and is hoisted on the inner wall of a steel shell at the position of the blast furnace tapping main ditch cover impacted by molten iron through bolts pre-embedded in the prefabricated part for use; the top prefabricated part is designed into a structure with a wide upper part and a narrow lower part, so that falling caused by the gravity of the top prefabricated part during use is avoided; the shape of the outer wall of the prefabricated member is consistent with that of the inner wall of the main trench cover steel shell at the position where the prefabricated member is arranged, the inner wall of the prefabricated member at the top is of a plane structure, and the inner walls of the prefabricated members at the left side and the right side are of circular arc structures; when the prefabricated member is installed, the prefabricated member can be attached to the inner wall of the steel shell of the main trench cover which is repeatedly used and deforms through the laying of the refractory fiber cotton. And pouring refractory castable into the rest parts of the inner wall of the main channel cover steel shell around the prefabricated part, which are not impacted by or less molten iron, for filling. The blast furnace tapping main ditch cover impact area adopts prefabricated parts, so that the whole service life of the main ditch cover is prolonged.
Description
Technical Field
The utility model relates to a main ditch cover auxiliary assembly field of tapping especially relates to the local structure field that main ditch cover strikes the district, specifically indicates a blast furnace tapping main ditch cover strikes prefab structure in district.
Background
The main ditch cover is mainly used for a main runner for tapping and is a structural part for preventing molten iron from splashing in the tapping process of a blast furnace. The main ditch cover impact area is at the afterbody of this structure, and the distance of about 8 meters apart from the taphole is because the falling point of molten iron just in time on this point, therefore this position can receive the hot shock of molten iron and erode, leads to the structure of this place very easily to damage, burn through, and is out of sync with the resistant material life-span of other positions.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing a prefabricated part structure of a blast furnace tapping main channel cover impact area which is resistant to scouring and abrasion and can be replaced at any time.
In order to achieve the purpose, the utility model relates to a blast furnace tapping main ditch cover strikes prefab structure in district as follows:
the prefabricated member structure of the blast furnace tapping main channel cover impact area is mainly characterized in that the prefabricated member structure consists of three prefabricated members, namely a top prefabricated member, a left side prefabricated member and a right side prefabricated member, the three prefabricated members are spliced into an arch structure and are hoisted on the inner wall of a main channel cover steel shell at the position where the blast furnace tapping main channel cover is impacted by molten iron for use, the prefabricated member further comprises internal steel structures, the top prefabricated member of the prefabricated member is of a structure with a wide top and a narrow bottom, the shape of the outer wall of the prefabricated member is consistent with that of the inner wall of the main channel cover steel shell at the position where the prefabricated member is arranged, the inner wall of the top prefabricated member is of a plane structure, and the inner walls of the left side prefabricated member and the right side prefabricated member are of circular arc structures; the outer wall of prefab pre-buried have a bolt, the inside steel structure welded fastening of bolt and prefab, the prefab passes through the bolt pass through the nut with main ditch cover box hat and be connected fixedly, the prefab pass through the laminating of refractory fiber cotton and main ditch cover box hat inner wall, main ditch cover box hat inner wall is filled around the position that does not receive or receive the molten iron impact of prefab and is poured and have the pouring material that equals with prefab thickness, inside steel structure be pre-buried at the inside network structure that welds by the steel unit of prefab structure.
Preferably, the internal steel structure comprises a steel mesh welded through a steel element and a bolt fixedly welded with the steel mesh, the steel mesh is poured into the prefabricated part, and the prefabricated part is hung on the inner wall of the steel shell of the main trench cover through the bolt.
Preferably, the tail part of the prefabricated member structure is provided with a thickened section, the section of the thickened section is in a wedge shape and gradually becomes thicker from top to bottom, and the thickened section and the prefabricated member structure are integrally formed.
Preferably, the upward angle of the wedge is 5 °.
Preferably, the thickness of the refractory cellucotton is 20mm, and the refractory cellucotton can resist the temperature of 1200 ℃.
Preferably, the thickness of the top preform is 180mm.
Preferably, the transverse distance of the bolt is 440 mm-460 mm, and the longitudinal distance is 750 mm-780 mm.
Preferably, the length of the bolt is 150-160 mm, and the embedded depth is 60-70 mm.
The utility model discloses a prefab structure of blast furnace tapping main ditch lid impact zone is through toasting the processing, appears phenomenons such as fracture, explosion when avoiding using, and is resistant to erode, stand wear and tear, and removable, can improve the easy defect of damaging of blast furnace tapping main ditch lid impact zone, realizes the purpose in the whole life-span of extension blast furnace tapping main ditch lid.
Drawings
FIG. 1 is a schematic view of the assembly of the prefabricated member structure of the blast furnace tapping main channel cover impact area of the present invention.
FIG. 2 is a schematic view of the structure of the prefabricated member of the blast furnace tapping main channel cover impact area of the present invention.
FIG. 3 is a schematic partial sectional view of the impact zone of the main tapping cover of the blast furnace of the present invention.
FIG. 4 is a schematic view of the blast furnace tapping main channel cover impact zone steel shell sectioning back prefabricated part of the utility model.
FIG. 5 is a schematic view of the blast furnace tapping main channel cover impact area local steel shell sectioning rear prefabricated part of the utility model.
Reference numerals are as follows:
1. main trench cover steel shell
2. Top prefabricated part
3. Right prefabricated part
4. Left side prefab
5. Refractory fiber cotton
6. Bolt
7. Nut with a nut body
8. Hoisting hole
9. Anchoring piece
10. Casting material for casting side wall
11. Pouring end castable
12. Pouring top castable
Detailed Description
In order to more clearly describe the technical content of the present invention, the following further description is made in conjunction with specific embodiments.
As shown in fig. 1 to 5, the utility model discloses a prefab structure of this blast furnace tapping main ditch cover impact area, including top prefab 2, right side prefab 3, left side prefab 4 and its inside steel structure, the outer wall of prefab structure have pre-buried bolt to cover the shell steel structure with main ditch and to be connected through the nut, top prefab 2, right side prefab 3 and left side prefab 4 and main ditch cover the junction that the shell steel structure 1 constructs laid the refractory fiber cotton 5. The three prefabricated parts are spliced into an arch structure and are hoisted on the inner wall of the steel shell at the position of the blast furnace tapping main channel cover impacted by molten iron for use.
As the utility model discloses a preferred embodiment, inside steel construct including the steel mesh that the steel unit welded and with steel mesh welded fastening's bolt 6, the steel mesh pour into the inside of prefab for support and strengthen the refractory material prefab, bolt 6 be used for hoisting top prefab 2, right side prefab 3 and left side prefab 4 in 1 inner wall of main trench cover steel casing.
As the preferred embodiment of the present invention, the prefabricated member structure comprises the top prefabricated member 2, the right side prefabricated member 3 and the left side prefabricated member 4, the top prefabricated member 2 designed to be a wide-top-bottom-narrow structure, which avoids falling off due to self gravity when in use, the right side prefabricated member 3 and the left side prefabricated member 4 are installed on two sides of the top prefabricated member, and the three prefabricated members form an arch structure with firm structure.
As the utility model discloses a preferred embodiment, the outer wall of top prefab 2, right side prefab 3 and left side prefab 4 pre-buried bolt 6 that has, the bolt constructs welded fastening with the inside steel of prefab, top prefab 2, right side prefab 3 and left side prefab 4 pass through bolt 6 and main ditch lid steel casing 1 pass through nut 7 and be connected, the dismantlement and the change of the prefab of being convenient for. The utility model discloses an in the embodiment, construct through 8 fixed mounting inside steel of hole for hoist.
As the preferred embodiment of the utility model, the shape of the outer wall of top prefab 2, right side prefab 3 and left side prefab 4 unanimous with the 1 inner wall of main ditch cover box hat of arranging prefab department, 2 inner walls of top prefab are planar structure, the 4 prefab inner walls of right side prefab 3 and left side prefab are circular arc structure.
As the utility model discloses a preferred embodiment, the arch prefab after the concatenation leaves the space of pouring refractory castable all around, fills and makes the arch structure mutual atress that three prefabs splice into behind the castable that matches with prefab thickness to it is more firm. In actual production, as shown in fig. 1 and 3, the casting material can be divided into a casting side wall casting material 10, a casting end casting material 11 and a casting top casting material 12 according to the casting position.
As the utility model discloses a preferred embodiment, the prefab when installing through laying of refractory fiber cotton, more can with use repeatedly and produce the laminating of main ditch cover box hat inner wall that warp.
As the preferred embodiment of the present invention, the tail of the top prefabricated member 2, the right side prefabricated member 3 and the left side prefabricated member 4 has a thickened section, the section of the thickened section is wedge-shaped, and the thickened section is gradually thickened from the top to the bottom, and the thickened section and the prefabricated member structure are integrally formed.
As a preferred embodiment of the present invention, the upward angle of the wedge is 5 °.
As the preferred embodiment of the utility model, the thickness of the refractory cellucotton 5 is 20mm, and the temperature resistance is 1200 ℃.
As a preferred embodiment of the present invention, the thickness of the top preform 2 is 180mm.
As the preferred embodiment of the utility model, the transverse distance of the bolt 6 is 440 mm-460 mm, and the longitudinal distance is 750 mm-780 mm.
In a preferred embodiment of the present invention, the length of the bolt 6 is 150 to 160mm, and the embedded depth is 60 to 70mm.
In the middle of the practical use, as the utility model discloses a preferred embodiment, the prefab form by refractory castable, refractory castable make by raw materials such as corundum, mullite and carborundum, refractory castable's matrix in according to the component proportion of mullite add alumina powder and silica micropowder.
In practical use, as a preferred embodiment of the present invention, the addition amount of corundum is 40-47%, the addition amount of mullite is 28-35%, the addition amount of silicon carbide is 4-5%, the addition amount of alumina powder is 10-13%, and the addition amount of silica powder is 4-5%.
In practical use, as a preferred embodiment of the present invention, the corundum is white corundum prepared by electric melting method, and the white corundum is Al 2 O 3 The content of (1) is more than or equal to 99 percent, and Fe 2 O 3 The content of the component (A) is less than or equal to 0.2 percent, and the component (B) is used for improving the wear resistance, the scouring resistance and the slag corrosion resistance.
In practical use, as a preferred embodiment of the present invention, the mullite is a mullite prepared by a sintering method, and the mullite has Al 2 O 3 The content of (C) is more than or equal to 76 percent, and SiO 2 The content of the composite material is more than or equal to 22 percent, and the composite material is used for improving the thermal shock stability of the prefabricated member.
In practical application, as a preferred embodiment of the present invention, the alumina powder is activated alumina powder or alpha-Al 2 O 3 The alumina powder and the silicon micro powder generate mullite at high temperature to generate mullite whiskers, and the mullite whiskers are used for increasing the toughness of the prefabricated part and improving the structural peeling.
In practice, the SiO of the fine silica powder is a preferred embodiment of the present invention 2 The content of the mullite is more than or equal to 92 percent, and the mullite is used for reducing the water adding amount of the castable and can react with alumina powder at high temperature to generate mullite.
In practical application, as a preferred embodiment of the present invention, the prefabricated member further comprises cement, and the Al of the cement 2 O 3 The content of the CaO is less than or equal to 30 percent, and the CaO content is 69-71 percent for ensuring that the prefabricated member has the strength required by use.
In practical use, as a preferred embodiment of the present invention, the prefabricated member is further added with an additive, wherein the content of the low-temperature explosion-proof fiber in the additive is 0.05-0.1%, the content of the water reducing agent is 0.1-0.2%, and the content of the retarder is 0.02-0.05%.
The embodiment of the utility model provides an in, the distribution of blast furnace tapping main ditch lid impact area prefab casting material is shown in table 1 below, and the performance index of casting material is shown in table 2 below, the refractory castable material, the tabular corundum add-on be 44%, the mullite add-on be 33.8%, carborundum content be 4%, the alumina powder add-on be 10.2%, the add-on of silica micropowder is 4%. The performance index at this time is optimal.
In practical use, as a preferred embodiment of the present invention, the prepared fire-resistant prefabricated member is cured for 48 hours and then baked at 600 ℃.
TABLE 1 blast furnace tapping main channel cover impact zone precast element castable mixture ratio
TABLE 2 Performance index of castable
In the specific embodiment of the utility model, as shown in fig. 1 and 3, the refractory material in the molten iron impact area that damages easily to the main ditch lid is designed into the prefab form, and this prefab includes refractory material pouring body and pre-buried steel structure net and bolt 6 in refractory material. After the prefabricated member is poured and baked, the prefabricated member is connected with a main ditch cover steel shell through a bolt 6 and a nut 7, and 20mm refractory fiber cotton 5 is laid between the main ditch cover main body structure and the prefabricated member, so that the prefabricated member has the functions of heat insulation, cushion leveling and the like. The main trench cover impact area can achieve the purposes of molten iron scouring resistance, wear resistance and convenient replacement in the area by improving the traditional castable into a prefabricated part, and further meets the requirement of prolonging the service life of the whole material of the main trench cover. Wherein, fig. 1 and 3 are schematic views of the case that the main trench cover is turned 90 ° to the left.
As shown in figure 2, the prefabricated member of the utility model is in the shape of a flat top and arc-shaped sides. The flat top and the arc-shaped structure correspond to the shape of the shell steel structure; the thickness of planar structure is 180mm, and the afterbody is the wedge, and progressively thickening, its angle that makes progress is 5.
As shown in fig. 4 and 5, the impact zone prefabricated member is connected with a main ditch cover shell steel structure 1 through bolts 6 embedded in the top surface by nuts 7, and a layer of 20mm refractory fiber cotton 5 is paved on the shell steel structure in advance during connection, and the temperature resistance of the fire resistant fiber cotton is 1200 ℃. After the installation is finished, a refractory castable with the thickness equivalent to that of the prefabricated member is poured at the position where the anchoring piece 9 is arranged in the main channel cover steel shell 1 at the periphery of the prefabricated member, and the prefabricated member is further fixed after the refractory castable is poured.
The refractory castable used by the prefabricated member is corundum-mullite castable, and the prefabricated member has the characteristics of good wear resistance and thermal shock stability and needs to be maintained and baked at the baking temperature of 600 ℃. In an embodiment, the refractory fiber wool may be a high temperature fiber blanket.
The mounting operation steps of the prefabricated part structure of the blast furnace tapping main channel cover impact area are as follows:
(1) Mounting the prefabricated member and the main ditch cover shell steel structure and fixing the prefabricated member and the main ditch cover shell steel structure by using a nut;
(2) And pouring refractory castable with the thickness equivalent to that of the prefabricated member at the position where the anchoring piece is arranged in the main channel cover steel shell at the periphery of the prefabricated member.
The technical scheme of the utility model has been applied to a plurality of embodiments in the actual production, the service life of the blast furnace tapping main channel is obviously prolonged, for example, the average service life of the first embodiment in the 5000 cubic meter blast furnace tapping main channel is prolonged by 53%, and the average service life of the second embodiment in the 4500 cubic meter blast furnace tapping main channel is prolonged by 46%; in the third embodiment, the average service life is improved by 71 percent in the application of a main tapping channel of a 3500 cubic meter blast furnace; example four the average service life was increased by 56% in 2500 cubic meter blast furnace tapping main runner applications.
For a specific implementation scheme of this embodiment, reference may be made to relevant descriptions in the foregoing embodiments, which are not described herein again.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar contents in other embodiments may be referred to for the contents which are not described in detail in some embodiments.
It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, "a plurality" means at least two unless otherwise specified.
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 do not necessarily 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.
Adopted the utility model discloses a prefab structure of blast furnace tapping main ditch lid impact area passes through the reinforced material performance to add phenomenons such as fracture, explosion appear when thin preparation technology avoids using, realize resistant washing away, wear-resisting performance, and can carry out the change.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (8)
1. The prefabricated member structure of the impact area of the blast furnace tapping main channel cover is characterized by comprising three prefabricated members, namely a top prefabricated member, a left side prefabricated member and a right side prefabricated member, wherein the three prefabricated members are spliced into an arch structure and are hoisted on the inner wall of a main channel cover steel shell of the blast furnace tapping main channel cover at the position impacted by molten iron for use, the prefabricated member further comprises internal steel structure, the top prefabricated member of the prefabricated member is of a structure with a wide top and a narrow bottom, the shape of the outer wall of the prefabricated member is consistent with that of the inner wall of the main channel cover steel shell where the prefabricated member is arranged, the inner wall of the top prefabricated member is of a plane structure, and the inner walls of the left side prefabricated member and the right side prefabricated member are of circular arc structures; the outer wall of prefab pre-buried have the bolt, the inside steel structure welded fastening of bolt and prefab, the prefab passes through the bolt pass through the nut with main ditch cover box hat and be connected fixedly, the prefab pass through the laminating of refractory fiber cotton and main ditch cover box hat inner wall, main ditch cover box hat inner wall fills around the position that does not receive or receive the molten iron impact of prefab and pours into the material that has and equals with prefab thickness, inside steel structure be pre-buried at the inside network structure that welds by the steel element of prefab structure.
2. The structure of the prefabricated member of the main tapping cover impact area of the blast furnace as claimed in claim 1, wherein the internal steel structure comprises a steel mesh welded by steel elements and bolts welded and fixed with the steel mesh, the steel mesh is poured into the prefabricated member, and the bolts hang the prefabricated member on the inner wall of the main cover steel shell.
3. The prefabricated structure of the impact zone of the main tapping cover of the blast furnace as claimed in claim 1, wherein the end of the prefabricated structure is provided with a thickened section, the section of the thickened section is wedge-shaped and becomes thicker gradually from top to bottom, and the thickened section and the prefabricated structure are integrally formed.
4. The preform structure of the blast furnace tapping main trough cover impact zone according to claim 3, wherein the upward angle of the wedge shape is 5 °.
5. The prefabricated member structure of the blast furnace tapping main channel cover impact area according to claim 1, wherein the refractory fiber wool has a thickness of 20mm and is resistant to a temperature of 1200 ℃.
6. The preform structure of the blast furnace tapping main channel cover impact zone according to claim 1, wherein the thickness of the top preform is 180mm.
7. The preform structure of the blast furnace tapping main channel cover impact zone according to claim 1, wherein the bolt has a transverse distance of 440mm to 460mm and a longitudinal distance of 750mm to 780mm.
8. The precast structure of the impact zone of the main tapping cover of the blast furnace according to any one of claims 1 to 7, wherein the length of the bolt is 150 to 160mm, and the embedded depth is 60 to 70mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221904379.5U CN217600761U (en) | 2022-07-22 | 2022-07-22 | Prefabricated part structure of blast furnace tapping main channel cover impact area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221904379.5U CN217600761U (en) | 2022-07-22 | 2022-07-22 | Prefabricated part structure of blast furnace tapping main channel cover impact area |
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| Publication Number | Publication Date |
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| CN217600761U true CN217600761U (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221904379.5U Active CN217600761U (en) | 2022-07-22 | 2022-07-22 | Prefabricated part structure of blast furnace tapping main channel cover impact area |
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| CN (1) | CN217600761U (en) |
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- 2022-07-22 CN CN202221904379.5U patent/CN217600761U/en active Active
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