CN214881624U - Long-life blast furnace iron runner - Google Patents
Long-life blast furnace iron runner Download PDFInfo
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- CN214881624U CN214881624U CN202121244442.2U CN202121244442U CN214881624U CN 214881624 U CN214881624 U CN 214881624U CN 202121244442 U CN202121244442 U CN 202121244442U CN 214881624 U CN214881624 U CN 214881624U
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Abstract
The utility model provides a long-life blast furnace tapping channel, which comprises an outer steel shell, a filling layer, a heat insulation layer, a permanent fire-resistant layer and a main channel body which are arranged from outside to inside in sequence; the heat insulation layer, the permanent fire-resistant layer and the main channel body are all U-shaped, U-shaped protrusions are symmetrically arranged on the inner side walls of the two sides of the permanent fire-resistant layer, the main channel body is cast in the permanent fire-resistant layer, U-shaped grooves are formed in the positions, corresponding to the U-shaped protrusions, of the two sides of the outer side wall of the main channel body, and the U-shaped protrusions are embedded in the U-shaped grooves. The utility model discloses can effectively avoid the main ditch body to split, and can realize rapid cooling, so can effectively prolong the life of tapping channel.
Description
Technical Field
The utility model relates to the technical field of blast furnace tapping channels, in particular to a long-life blast furnace tapping channel.
Background
The blast furnace tapping channel is an important facility in front of a blast furnace, and mainly has the functions of buffering iron slag sprayed out of a blast furnace tapping hole, realizing iron slag separation and further conveying the iron slag to a ladle and a slag flushing granulation facility respectively. In actual production, the working environment of the iron tapping runner is extremely severe, such as frequent scouring and erosion of high-temperature molten iron and slag, and severe thermal shock effect of intermittent iron tapping. The iron runner is in the environment of high temperature at the during operation, needs in time to cool down it, and natural cooling or forced air cooling are adopted to current cooling mode more, and effect and efficiency are lower, make the iron runner receive the damage equally easily, have greatly shortened the life of iron runner, are unfavorable for the normal orderly production of blast furnace. In addition, one side of the iron runner is high-temperature molten iron, and the other side of the iron runner cools the iron runner, so that the problem of iron leakage caused by longitudinal cracking in the middle of the iron runner is easy to occur.
The cracking is mainly caused by that the inner side of the working layer of the iron runner is soaked in molten iron with the temperature as high as 1450 ℃, the refractory material has larger thermal expansion, the outer side of the working layer needs to be subjected to cooling operation, the temperature of the upper surface is generally only about 300 ℃, and the linear expansion amount of the working layer is obviously far smaller than that of the inner side of the working layer. The outer side is thus subjected to a lateral pulling force on the inner side and thus cracked. As the service life increases, the crack branches progress inward, and eventually cause the fracture of the working layer, so that molten iron is drilled through the cracks, thereby affecting the collection of molten iron.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a long-life blast furnace tapping channel.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a long-life blast furnace tapping channel comprises an outer steel shell, a filling layer, a heat insulation layer, a permanent fire-resistant layer and a main channel body which are sequentially arranged from outside to inside; the heat insulation layer, permanent flame retardant coating and the main ditch body are U-shaped, the symmetry is provided with the U-shaped arch on the inside wall of the both sides of permanent flame retardant coating, the main ditch body is cast in the permanent flame retardant coating, just the both sides of the outside wall of the main ditch body with the protruding corresponding position department of U-shaped is provided with the U-shaped recess, the U-shaped arch inlays the dress and is in the U-shaped recess.
Preferably, the outer side wall of the permanent fire-resistant layer is provided with radiating fins at intervals, one ends of the radiating fins are integrally connected with the permanent fire-resistant layer, and the other ends of the radiating fins are fixedly connected with the heat-insulating layer; the radiating fins are in strip shapes and extend from the head end of the permanent refractory layer to the tail end of the permanent refractory layer.
Preferably, an annular cavity is formed between every two adjacent radiating fins, every two adjacent permanent refractory layers and every two adjacent heat-insulating layers, one end of each cavity, which is close to an outlet of the blast furnace, is hermetically connected with a water inlet pipe, the other end of each cavity is hermetically connected with a water outlet pipe, one ends of the water inlet pipes, which are far away from the cavities, are all communicated with a water inlet main pipe, the water outlet pipes are all communicated with a water outlet main pipe, and the water inlet main pipe and the water outlet main pipe are respectively communicated with two ends of a cooling water tank; and a circulating water pump is arranged between the water inlet main pipe and the cooling water tank.
Preferably, the cross section of the heat dissipation fin is triangular.
Preferably, the water inlet main pipe and the water outlet main pipe are of the same structure and are both U-shaped.
Preferably, the main channel body is elevated at both ends above the permanent refractory layer and extends to both sides to intersect the outer steel shell.
Preferably, the thickness of the main gutter body is not less than 1 m.
Compared with the prior art, the beneficial effects of the utility model are that: the U-shaped groove can buffer the tensile force towards two sides when the linear expansion amount of the outer side of the main groove body is smaller than the linear expansion amount of the inner side of the main groove body and the main groove body is forced to stretch outwards, namely, a notch is reserved in advance to avoid the main groove body from cracking again, so that the service life of the main groove body can be effectively prolonged; the arrangement of the radiating fins divides the space between the heat-insulating layer and the permanent fire-resistant layer into a plurality of cavities, so that cooling water can directly flow through the cavities to form a cooling loop, and meanwhile, the two sides of the radiating fins are in contact with the cooling water, so that the cooling is faster; the plurality of cooling loops cool more quickly than the spiral cooling loops; the radiating fins are supported between the heat insulation layer and the permanent fire-resistant layer, so that the supporting effect is better; the radiating fins are triangular, and compared with the existing thinner radiating fins, the radiating fins are convenient for the temperature of the permanent refractory layer to be transferred to the radiating fins, so that the cooling effect is improved.
Drawings
FIG. 1 is a schematic view showing the overall structure of a long-life blast furnace tapping runner according to the present invention.
FIG. 2 is a side view of a long-life blast furnace tapping channel of the present invention.
FIG. 3 is a schematic structural view of a long-life inlet header pipe of a blast furnace tapping runner according to the present invention.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1, 2 and 3, a long-life blast furnace tapping channel according to an embodiment of the present invention includes an outer steel shell 1, a filling layer 2, a heat insulating layer 3, a permanent fire-resistant layer 4 and a main channel body 5, which are sequentially arranged from outside to inside; the heat insulation layer 3, the permanent fire-resistant layer 4 and the main channel body 5 are all U-shaped, U-shaped protrusions 41 are symmetrically arranged on the inner side walls of two sides of the permanent fire-resistant layer 4, the main channel body 5 is cast in the permanent fire-resistant layer 4, U-shaped grooves 51 are arranged at positions, corresponding to the U-shaped protrusions 41, of two sides of the outer side wall of the main channel body 5, and the U-shaped protrusions 41 are embedded in the U-shaped grooves 51.
In one embodiment, the heat insulation layer 3, the permanent refractory layer 4 and the main channel body 5 are all U-shaped, so that compared with a rectangle, when a blast furnace iron channel is built, the use of materials can be effectively saved. In addition, the filling layer 2 is filled between the outer steel shell 1 and the heat insulation layer 3, so that an effective supporting effect is achieved, and the heat insulation layer 3 is prevented from deforming. The U-shaped bulges are arranged on the two sides of the permanent fire-resistant layer 4, so that the U-shaped groove 51 can be conveniently cast directly when the main groove body 5 is cast, and a mould is not required to be arranged additionally. The U-shaped groove 51 can bear slag molten iron in the main groove body 5 and disperse thermal stress after expansion, and the thermal stress generated by the thermal expansion on the inner side is buffered at the U-shaped groove 51, so that the cracking of the outer side of the main groove body 5 due to temperature difference can be effectively avoided, and the service life of the main groove body 5 is prolonged.
Preferably, the outer side wall of the permanent fire-resistant layer 4 is provided with radiating fins 6 at intervals, one ends of the radiating fins 6 are integrally connected with the permanent fire-resistant layer 4, and the other ends of the radiating fins 6 are fixedly connected with the heat-insulating layer 3; the heat dissipating fins 6 are elongated and extend from the head end of the permanent refractory layer 4 to the tail end of the permanent refractory layer 4. The arrangement of the radiating fins 6 is convenient for the heat dissipation of the main groove body 5 and the permanent fire-resistant layer 4.
As shown in fig. 1 and fig. 2, preferably, an annular cavity 7 is formed between two adjacent heat dissipation fins 6, the permanent fire-resistant layer 4 and the heat-insulating layer 3, one end of each cavity 7 close to the outlet of the blast furnace is hermetically connected with a water inlet pipe 8, the other end of each cavity 7 is hermetically connected with a water outlet pipe 9, one ends of the water inlet pipes 8 far away from the cavities 7 are all communicated with a water inlet main pipe 10, the water outlet pipes 9 are all communicated with a water outlet main pipe 11, and the water inlet main pipe 10 and the water outlet main pipe 11 are respectively communicated with two ends of a cooling water tank 12; a circulating water pump 13 is arranged between the water inlet main pipe 10 and the cooling water tank 12.
In this embodiment, the formation of cavity 7 can provide the circulation passageway for the cooling water, a plurality of radiating fins 6 and permanent flame retardant coating 4 and thermal-insulated heat preservation 3 are mutually supported and are connected, so can form a plurality of cooling water circulation passageways, collocation outside inlet tube 8 this moment again, outlet pipe 9, circulating water pump 13 and cooling water tank 12, form a plurality of independent annular closed cooling water circulation system, thereby carry out water-cooling to the inboard lateral wall of every cavity 7 that corresponds respectively, water-cooling can effectively protect the fire-resistant ability of blast furnace iron runner, so only in order to prolong the life of blast furnace iron runner. This use a plurality of independent water-cooling return circuits of neotype a plurality of cavities 7 formation, set up spiral coil in 4 both sides of permanent flame retardant coating for current and carry out water-cooled mode, it is more even to make the cooling on the one hand, and cover whole permanent flame retardant coating 4, the cooling coverage area is complete, and all flow in each cavity 7 be initial cooling water, and for sharp circulation, compare with spiral coil, the route that the cooling water in the cavity 7 flowed through is short, and only cool down 7 inside walls of cavity, consequently, when the iron runner rear end, the temperature is lower relatively, thereby it can carry out the heat exchange more, and fast, consequently, can improve cooling efficiency. In addition, the cavity 7 formed by the plurality of radiating fins 6 is directly cooled, so that the heat exchange area is increased, and the cooling efficiency can also be improved.
As shown in fig. 1, preferably, the cross section of the heat dissipation fin 6 is triangular, which is equivalent to the heat dissipation fin 6 being triangular prism-shaped, on one hand, the heat dissipation fin 6 is thick, and is uniformly distributed between the permanent refractory layer 4 and the heat insulation layer 3, which can play a good supporting role, ensure the uniform stress on the outer side of the permanent refractory layer 4, and avoid the deformation of the permanent refractory layer 4 when the main trench body 5 is poured. Meanwhile, the triangular prism-shaped radiating fins 6 are thicker, so that the heat of the permanent refractory layer 4 is more conveniently transferred to the radiating fins 6, heat exchange is performed when the water cooling is more convenient, and the heat exchange and cooling efficiency can be effectively improved.
As shown in fig. 3, the water inlet manifold 10 and the water outlet manifold 11 are preferably identical in structure and U-shaped, so that cooling water can be respectively injected into the water inlet pipes 8 from the water inlet manifold 10, and the cooling water in the water outlet pipes 9 can be converged and flow into the water outlet manifold 11 to cool the water tank 12.
As shown in fig. 1, the main channel body 5 is preferably higher than the permanent refractory layer 4 at both ends and extends to both sides to intersect with the outer steel shell 1, so as to ensure that the upper end of the iron channel also has refractory capability, thereby effectively protecting the iron channel when molten iron slag enters the iron channel and splashes outwards to both sides of the iron channel.
Preferably, the thickness of the main gutter body 5 is not less than 1 m, ensuring that the main gutter body 5 can be used for a long time.
The utility model discloses when using, utilize the main ditch body 5 transport sediment molten iron of blast furnace iron runner, utilize U-shaped recess 51 can disperse the thermal stress that the higher production of the inboard temperature of main ditch body 5 falls, effectively protect main ditch body 5, avoid its fracture under thermal stress to effectively improve life. When the slag molten iron flows into the main runner body 5, the circulating water pump 13 is started, cooling water is pumped into the water inlet main pipe 10 and flows into the corresponding cavities 7 through the water inlet pipes 8 respectively to cool the whole iron runner, and the cooling water flows into the water outlet pipe 9 after passing through the cavities 7 and then flows into the water outlet main pipe 11 to flow into the cooling water tank 12 to form circulation. At this moment, realized rapid cooling on the one hand, improved the service life of iron runner, on the other hand can avoid the water waste.
From the above, the arrangement of the U-shaped groove in the long-life blast furnace tapping channel of the utility model can buffer the pulling force towards the two sides when the linear expansion amount outside the main channel body is smaller than the linear expansion amount inside the main channel body and is forced to be stretched outwards, which is equivalent to reserving a notch in advance and avoiding the re-cracking of the main channel body, thus effectively prolonging the service life of the main channel body; the arrangement of the radiating fins divides the space between the heat-insulating layer and the permanent fire-resistant layer into a plurality of cavities, so that cooling water can directly flow through the cavities to form a cooling loop, and meanwhile, the two sides of the radiating fins are in contact with the cooling water, so that the cooling is faster; the plurality of cooling loops cool more quickly than the spiral cooling loops; the radiating fins are supported between the heat insulation layer and the permanent fire-resistant layer, so that the supporting effect is better; the radiating fins are triangular, and compared with the existing thinner radiating fins, the radiating fins are convenient for the temperature of the permanent refractory layer to be transferred to the radiating fins, so that the cooling effect is improved.
The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.
Claims (7)
1. The utility model provides a long-life blast furnace casting runner which characterized in that: comprises an outer steel shell, a filling layer, a heat insulation layer, a permanent fire-resistant layer and a main groove body which are arranged from outside to inside in sequence; the heat insulation layer, permanent flame retardant coating and the main ditch body are U-shaped, the symmetry is provided with the U-shaped arch on the inside wall of the both sides of permanent flame retardant coating, the main ditch body is cast in the permanent flame retardant coating, just the both sides of the outside wall of the main ditch body with the protruding corresponding position department of U-shaped is provided with the U-shaped recess, the U-shaped arch inlays the dress and is in the U-shaped recess.
2. The long life blast furnace runner of claim 1, characterized in that: radiating fins are arranged on the outer side wall of the permanent fire-resistant layer at intervals, one ends of the radiating fins are integrally connected with the permanent fire-resistant layer, and the other ends of the radiating fins are fixedly connected with the heat-insulating layer; the radiating fins are in strip shapes and extend from the head end of the permanent refractory layer to the tail end of the permanent refractory layer.
3. The long life blast furnace runner of claim 2, characterized in that: an annular cavity is formed between every two adjacent radiating fins, the permanent fire-resistant layer and the heat insulation layer, one end of each cavity, which is close to an outlet of the blast furnace, is hermetically connected with a water inlet pipe, the other end of each cavity is hermetically connected with a water outlet pipe, one ends of the water inlet pipes, which are far away from the cavities, are all communicated with a water inlet main pipe, the water outlet pipes are all communicated with a water outlet main pipe, and the water inlet main pipe and the water outlet main pipe are respectively communicated with two ends of a cooling water tank; and a circulating water pump is arranged between the water inlet main pipe and the cooling water tank.
4. The long life blast furnace runner of claim 3, characterized in that: the cross section of the radiating fin is triangular.
5. The long life blast furnace runner of claim 3, characterized in that: the water inlet main pipe and the water outlet main pipe are identical in structure and are U-shaped.
6. The long life blast furnace runner of claim 1, characterized in that: the two ends of the main groove body are higher than the permanent fire-resistant layer and extend to the two sides to intersect with the outer steel shell.
7. The long life blast furnace runner of claim 6, characterized in that: the thickness of the main groove body is not less than 1 meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121244442.2U CN214881624U (en) | 2021-06-04 | 2021-06-04 | Long-life blast furnace iron runner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121244442.2U CN214881624U (en) | 2021-06-04 | 2021-06-04 | Long-life blast furnace iron runner |
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| CN214881624U true CN214881624U (en) | 2021-11-26 |
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| CN202121244442.2U Active CN214881624U (en) | 2021-06-04 | 2021-06-04 | Long-life blast furnace iron runner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114685174A (en) * | 2022-04-27 | 2022-07-01 | 长兴明天炉料有限公司 | High-strength light tapping channel and preparation method thereof |
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2021
- 2021-06-04 CN CN202121244442.2U patent/CN214881624U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114685174A (en) * | 2022-04-27 | 2022-07-01 | 长兴明天炉料有限公司 | High-strength light tapping channel and preparation method thereof |
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