CN203373359U - Furnace bottom structure of blast furnace - Google Patents

Abstract

The utility model discloses a furnace bottom structure of a blast furnace, which comprises a blast furnace foundation, a furnace bottom sealing plate, a furnace shell, a furnace bottom water cooling pipe and a gas sealing cover, and is characterized in that the furnace bottom sealing plate is arranged on the blast furnace foundation, The furnace shell is fixed on the furnace bottom sealing plate, and the gas enclosure is arranged outside the furnace shell, and the gas enclosure is sealed with the furnace shell and the furnace bottom sealing plate respectively. The beneficial effects obtained by the utility model are as follows: the furnace bottom sealing plate is arranged on the foundation of the blast furnace and extends out of the furnace shell, the furnace bottom sealing plate and the furnace shell are directly welded, and the welding seam is outside the furnace shell, which is convenient for handling. There are no grouting holes in the board to reduce gas leakage.

Description

Bottom structure of a blast furnace

technical field

The utility model relates to a bottom structure of a blast furnace.

Background technique

At present, the furnace bottom sealing plate of the blast furnace is mostly arranged inside the furnace shell, as shown in FIG. 1 , the furnace bottom sealing plate 1 and the furnace shell 2 are connected by an angle steel 8 . Two circles of pre-embedded steel plates 10 and 11 are set above the blast furnace foundation 3, and the pre-embedded steel plates 10 and the pre-embedded steel plates 11 are respectively welded to the gas sealing cover 5 and the furnace shell 2 provided outside the furnace shell. In order to prevent the temperature of the blast furnace foundation 3 from being too high, a relatively high heat-resistant concrete foundation pier 6 is arranged between the furnace bottom sealing plate 1 and the blast furnace foundation 3 . The furnace bottom sealing plate 1 is fixed by I-beam 4, high alumina cement castable 15 is buried between the furnace bottom sealing plate 1 and the furnace bottom water cooling pipe 16, and carbon ramming material 17 is buried above the furnace bottom water cooling pipe A circle of clay bricks 13 is arranged in the furnace shell, and there is a certain gap between the clay bricks 13 and the furnace shell 2, and the gap is filled with carbon filler 13. A heat-resistant concrete foundation pier 6 is buried in the clay brick 14, a heat-resistant concrete secondary pouring layer 9 is set between the furnace bottom sealing plate 1 and the heat-resistant concrete foundation pier 6, and a grouting hole is arranged on the furnace bottom sealing plate 1 , use the pressure grouting material 7 to fill between the furnace bottom sealing plate 1 and the heat-resistant concrete secondary pouring layer 9 . The design form of the blast furnace foundation and the furnace bottom sealing plate area effectively avoids the rising and deformation of the furnace shell caused by the temperature rise after the blast furnace is baked and put into operation, prevents the furnace shell from cracking, and considers gas sealing measures. However, the cooling strength of the furnace bottom is sufficient at present, and the temperature below the water-cooled pipe of the furnace bottom is maintained at 40°C~60°C, and the base temperature will not be too high; a large number of grouting holes need to be opened on the furnace bottom sealing plate 1, if the grouting holes are blocked during construction If it is not in place, it will form a gas leak point, which is difficult to deal with. In addition, the weld seam that the furnace bottom sealing plate 1 is connected with the furnace shell 2 is in the furnace, so it is difficult to handle gas leakage in case a problem occurs. Moreover, the pre-embedded steel plate 11 welded to the furnace shell provided on the blast furnace foundation 3 is also likely to bring hidden dangers of gas leakage, and such leakage points are inconvenient for follow-up treatment.

Utility model content

The technical problem to be solved by the utility model is to provide a blast furnace that reduces gas leakage points and improves the operability of accidents in view of the technical problems in the above-mentioned prior art.

The technical scheme adopted by the utility model is: a furnace bottom structure of a blast furnace, which includes a blast furnace foundation, a furnace bottom sealing plate, a furnace shell, a furnace bottom water cooling pipe, and a gas sealing cover, and is characterized in that the furnace bottom sealing plate is set On the heat-resistant concrete pier set above the blast furnace foundation, the furnace shell is fixed on the furnace bottom sealing plate, and the gas cover is arranged outside the furnace shell, and the gas sealing cover is respectively sealed with the furnace shell and the furnace bottom sealing plate.

According to the above-mentioned technical scheme, the furnace bottom water cooling pipe is arranged above the furnace bottom sealing plate.

According to the above technical scheme, a circle of pre-embedded steel plates is arranged on the side of the blast furnace foundation.

According to the above technical solution, the furnace bottom sealing plate is fixed on the foundation of the blast furnace through I-beams, and the space between the I-beams is filled with heat-resistant concrete.

According to the above technical scheme, high alumina cement castables are buried between the furnace bottom sealing plate and the furnace bottom water-cooled pipe, and a circle of clay bricks is set in the furnace shell. There is a certain gap between the clay bricks and the furnace shell. The gap is filled with carbon filler.

The beneficial effects obtained by the utility model are:

1. Set the furnace bottom sealing plate on the foundation of the blast furnace and extend out of the furnace shell. The furnace bottom sealing plate and the furnace shell are directly welded. The weld seam is outside the furnace shell, which is convenient for handling. There is no grouting hole in the furnace bottom sealing plate to reduce gas leak point;

2. A circle of pre-embedded steel plates is installed on the side of the blast furnace foundation. Once a gas leak occurs, a gas cover is made outside the furnace shell and welded to the pre-embedded steel plate as a treatment method for subsequent gas leak accidents, which further improves the Operability in the event of an accident;

3. The heat-resistant concrete pier in the original structure is canceled, which further reduces the cost compared with the previous blast furnace foundation.

4. The furnace bottom water-cooling pipe is arranged above the furnace bottom sealing plate, so that the furnace bottom cooling effect is good.

Description of drawings

Fig. 1 is a schematic structural diagram of a blast furnace in the prior art.

Fig. 2 is a structural schematic diagram of the blast furnace of the present invention.

In the figure: 1. Furnace bottom sealing plate, 2. Furnace shell, 3. Blast furnace foundation, 4. I-beam, 5. Gas sealing cover, 6. Heat-resistant concrete foundation pier, 7. Pressure grouting material, 8. Angle steel, 9. Heat-resistant concrete secondary pouring layer, 10. Embedded steel plate, 11. Embedded steel plate, 12. Embedded steel plate, 13. Carbon filler, 14. Clay brick, 15. High alumina cement castable, 16. Furnace bottom Water-cooled pipe, 17, carbon ramming material, 18, heat-resistant concrete.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 2, this embodiment provides a furnace bottom structure of a blast furnace, which includes a blast furnace foundation 3, a furnace bottom sealing plate 1, a furnace shell 2, and a gas enclosure 5, and the furnace bottom sealing plate 1 passes through the I-beam 4 It is fixed on the blast furnace foundation 3 and filled with heat-resistant concrete 18 between the I-beams 4 . The furnace shell 2 is welded on the furnace bottom sealing plate 1, and the furnace bottom sealing plate 1 extends out of the furnace shell, and the gas sealing cover 5 is arranged outside the furnace shell, and the gas sealing cover 5 is sealed with the furnace shell 2 and the furnace bottom sealing plate 1 respectively welding. In the utility model, the furnace bottom sealing plate is arranged on the foundation of the blast furnace and extends out of the furnace shell. The furnace bottom sealing plate and the furnace shell are directly welded, and the welding seam is outside the furnace, which is convenient for handling.

Since the furnace bottom water-cooling pipe is arranged on the furnace bottom sealing plate, the cooling strength of the furnace bottom is sufficient, and the temperature below the furnace bottom water-cooling pipe is stably maintained at 40°C~60°C. The utility model cancels the heat-resistant concrete foundation pier and the pressure tank slurry layer , There is no grouting hole on the furnace bottom sealing plate, and the furnace bottom sealing plate should be assembled in large pieces as much as possible to reduce the number of welds and gas leakage points. A high alumina cement castable 15 is used between the furnace bottom sealing plate 1 and the furnace bottom water-cooled pipe 16. For the convenience of construction, a circle of clay bricks 14 is arranged in the furnace shell 2, and a certain space is left between the clay bricks 14 and the furnace shell 2. The voids are filled with carbon filler 13. Compared with the original technology, the blast furnace reduces the cost.

In this embodiment, a ring of pre-embedded steel plates 12 with a height of about 150 mm to 200 mm is arranged on the side of the blast furnace foundation. The buried steel plate 12 is welded as a treatment means when a gas leakage accident occurs in the follow-up.

Claims (5)

1. the bottom construction of a blast furnace, it comprises blast furnace foundation, furnace bottom shrouding, furnace shell, furnace bottom water cooling tube, coal gas sealing cover, it is characterized in that described furnace bottom shrouding is fixedly installed on blast furnace foundation, furnace shell is fixed on the furnace bottom shrouding, and the furnace bottom shrouding stretches out outside furnace shell, described coal gas sealing cover is arranged on outside furnace shell, this coal gas sealing cover respectively with furnace shell and furnace bottom shrouding seal arrangement.

2. the bottom construction of a kind of blast furnace according to claim 1, is characterized in that the furnace bottom water cooling tube is arranged on the top of furnace bottom shrouding.

3. the bottom construction of a kind of blast furnace according to claim 1, is characterized in that being provided with in the side of blast furnace foundation a circle pre-embedded steel slab.

4. the bottom construction of a kind of blast furnace according to claim 1 and 2, is characterized in that described furnace bottom shrouding is fixed on blast furnace foundation by joist steel, fills by heat resistance concrete between joist steel.

5. the bottom construction of a kind of blast furnace according to claim 1 and 2, it is characterized in that burying the high-alumina cement mould material underground between furnace bottom shrouding and furnace bottom water cooling tube, one circle clay brick is set in furnace shell, leaves certain ，Gai gap, space between clay brick and furnace shell and fill with charcoal element filler.

Images