KR20040056321A - Blast furnace support tuyere with ribs - Google Patents

Abstract

PURPOSE: A blast furnace tuyere cooler with ribs is provided to increase damage resistance and external pressure resistance against degraded materials inside blast furnace by simultaneously improving cooling capacity and durability of tuyere cooler through which cooling water passes. CONSTITUTION: In a blast furnace tuyere cooler comprising a space formed in center of the blast furnace tuyere cooler so that hot air of high temperature passes through the space, a passageway formed to a certain thickness on the outer circumference of the space, a pair of water supply ports(6) and a drainage(7) respectively formed on an outer end part of the passageway so that the water supply ports supply cooling water(9), and the drainage discharges cooling water, the blast furnace tuyere cooler comprises a plurality of ribs(8) installed inside the passageway to forcibly guide flow of cooling water, wherein the ribs comprise ribs having a bent structure so that cooling water flown in through the pair of water supply ports is mixed with each other, and vertically extended ribs arranged in such a shape that the ribs are alternately connected to upper part and lower part of the tuyere cooler.

Description

Blast furnace support tuyere with ribs}

The present invention relates to a blast furnace tuyere equipped with a trimming plate (rib), and more specifically, damage to the heat products in the blast furnace by improving the cooling capacity and durability of the blast furnace through which the coolant passes through It relates to a blast furnace bulge equipped with a trimming plate that can increase the external pressure resistance.

In the blast furnace operation, iron ore, which is a raw material, and coke, which is fuel, are alternately charged to the upper part of the furnace, and operation is performed by blowing high temperature hot air from the vent of the furnace. During the operation of the blast furnace, the blowhole equipment which is connected to the blower at the bottom of the blast furnace to blow hot air into the blast furnace frequently requires hot gas and melt contact, and thus requires excellent cooling ability.

1 is a cross-sectional view showing the configuration of a blast furnace balloon used in the prior art.

Hot air (about 1,100 ° C.) blown into the blast furnace is blown in via the blowhole 2 through the blowpipe 3 inserted into the bottom of the blast furnace. At this time, the large tuyere 1 for supporting the tuyere 2 is to maintain the tuyere 2 at an appropriate angle so that the hot air is blown in the direction desired by the operator. In addition, the large tuyere (1) serves to protect the blast furnace tuyere set (5) from the heat radiated from the blow pipe (3) due to the hot air. The blow pipe 3 is connected to the annular tube 4 to receive hot air.

The structure and cooling method of the large air outlet 1 as described above will be described with reference to FIGS.

Referring to FIG. 2, which is an external perspective view, the large air outlet 1 is a conical shape in which an upper portion in which a hot air is input is formed. The outer end portion is provided with a pair of large air outlet cooling water supply openings 6, and a large air opening cooling water drain opening 7 through which the cooling water introduced through the water supply opening 6 is discharged. A portion where the water supply port 6 and the drain port 7 are installed is exposed to the outside, the cooling water pipe is connected to perform the cooling function.

3 is a side cross-sectional view of the large air outlet 1, the water supply port 6 and the drain 7 is connected to the upper end surface, it can be seen that the passage (1a) for the cooling water flow is formed. The cooling water supplied is to cool the heat caused by the hot air wind passing through the center of the passage 1a.

FIG. 4 is a partially developed view of the large tuyere 1 of FIG. 3, showing a portion of the passage 1a. As shown in the figure, the coolant flowing through the pair of water inlets 6 is discharged through the drain hole 7, which is not a specific direction in the process of combining the coolant flowing into the water supply port 6 in all directions Will move. According to the movement state of the coolant there was a problem that the cooling effect is not smooth flow.

Moreover, since there are no internal components that act as pedestals inside the blisters 1, the attachments dropped from the furnace wall inside the blast furnace are damaged or dent when the mechanical pressure is applied to the front end of the blisters 1. There is a problem that the deformed and the cooling water (9) flows into the blast furnace, and the tuyere (2) is dropped out.

The present invention is to solve the above problems, an object of the present invention to improve the cooling capacity and durability of the blast furnace through which the coolant passes through the blast furnace equipment at the same time to increase the damage and external pressure resistance to the heat products inside the blast furnace It is to provide a blast furnace bulge equipped with a trimming plate.

1 is a cross-sectional view showing the configuration of a conventional blast furnace balloon equipment,

2 is a perspective view of the blast furnace grand opening,

3 is a cross-sectional view of the blast furnace grand opening,

4 is an exploded view of the blast furnace grand opening,

5 is a cross-sectional view of the blast furnace blast opening according to the present invention,

6 is a developed view of the blast furnace grand opening according to the present invention.

※ Explanation of symbols about main part of drawing ※

1: large air ball 2: large air ball

3: blow pipe 4: annular tube

5: Yeonwa 6: (Daegonggu cooling water) water inlet

7: (Daegonggu cooling water) drain 8: 8: trimming plate

9: cooling water

In order to achieve the above object, the blast furnace wind hole provided with the trimming plate of the present invention has a space in which hot heat passes and a passage having a predetermined thickness is formed at an outer circumference of the space, and cooling water is formed at an outer end of the passage. In the blast furnace daegugu formed with a pair of water supply port for supplying and the drain port for discharging the coolant, characterized in that a plurality of trimming plate forcibly inducing the flow of the cooling water in the passage.

According to another feature of the present invention, the trimming plate is composed of a trimming plate extending vertically and a trimming plate having a bent structure that allows the cooling water introduced through a pair of water inlets to merge, in particular a vertically extending trimming plate Are alternately arranged in the form of being connected to the upper side and the lower side, respectively.

Hereinafter, with reference to the accompanying drawings will be described in detail the blast furnace bulge equipped with a trimming plate of the present invention.

FIG. 5 is a cross-sectional view of the large tuyere 1 according to the present invention, which is cut at essentially the same position as FIG. 3. As shown, a plurality of trimmers 8 are provided to block the passage 1a. At this time, the trimming plate 8 does not block all of the passages 1a, but a space is formed on the upper side or the lower side so that the cooling water passes. In the figure, a trimming plate 8 having a space formed on the lower side is illustrated.

Since the trimming plate 8 is blocked between the water inlet 6 and the drain 7 as described above, the cooling water is not evenly mixed as in the prior art but is distributed evenly along the flow path formed by the trimming plate 8. Will be. This dispersion movement has the advantage that the cooling effect is increased.

In the present invention, it is possible to efficiently control the movement state of the coolant by configuring the coolant introduced through the water inlet 6 to be initially incorporated. In other words, strong cooling water flow can be induced by initially combining the cooling water.

6 is a developed view of the large mouth opening 1. In fact, the development of the large ventilator 1 has an arc shape, but it should be understood that both ends are not shown in the drawing.

The trimming plate 8 provided adjacent to the water inlet 6 has a bent shape twice. By this structure, as the cooling water 9 introduced through the pair of water inlets 6 is combined, the flow pressure is doubled to obtain a strong flow.

The combined coolant 9 is distributed and moved by the trimming plate 8 located at the side of the lower part. At this time, the cooling water 9 distributed is evenly distributed, and also has a merit that the cooling effect is improved since it is moved at a strong pressure. The trimming plates 8 other than the trimming plate 8 adjacent to the water inlet 6 extend vertically and are sequentially fixed at the upper end and the lower end, and a space is formed at the non-fixed part so that the cooling water 9 passes. Done.

The trimming plate 8 may be configured to have a thickness of about 5 to 10 mm depending on the size of the large air vent 1 and the pressure of the cooling water. In addition, the distance between the trimmers 8 may be set to about 100 mm, but is not limited to these values. The arrangement of the trimming plates 8 is such that the cooling water merged through the water inlet 6 is distributed in exactly 1/2, and the distance to reach the drain 7 is equal.

Cooling efficiency of the large tuyere 1 according to the present invention, the actual blast furnace tuyere installation results are as follows. Comparing the cooling surface temperature and the heating surface temperature of the large air vent 1, in the conventional large air vent 1, the temperature (Tc) of the cooling surface was about 300 ℃, the heating surface temperature (Th) was about 331.3 ℃ In the large air outlet 1 according to the present invention, the cooling surface temperature is about 220 ° C., and the heating surface temperature is about 250.6 ° C., which is about 80 ° C. lower than that of the conventional one, and the cooling capacity is improved by about 27%.

In addition, the trimming plate 8 acts as an additional support to the passage 1a of the air blower 1 to increase durability and resistance against depression and deformation due to mechanical and physical pressure caused by attachments dropped from the blast furnace. By increasing the resistance to thermal and mechanical damage of the heat products in the blast furnace, the life span of the blisters 1 is extended.

According to the present invention, it is possible to improve the cooling capacity and durability of the blast furnace through which the coolant passes through the blast furnace fittings at the same time, thereby increasing the damage and the external pressure resistance to the heat products in the blast furnace.

Claims (2)

In the center, a space through which hot heat passes is formed, and a passage 1a having a predetermined thickness is formed at the outer periphery of the space, and a pair of water inlets 6 for supplying cooling water to the outer end of the passage 1a; In the blast furnace air vent formed with a drain hole (7) for discharging the cooling water, The blast furnace bulge according to claim 4, characterized in that a plurality of trimming plates (8) for forcibly inducing the flow of cooling water is provided in the passage (1a). The method of claim 1, The trimming plate 8 includes a trimming plate 8 having a bent structure for allowing the cooling water introduced through the pair of water inlets 6 to merge, and a trimming plate extending vertically. The trimming plate is a blast furnace bulge provided with a trimming plate, characterized in that arranged alternately connected to the upper side and the lower side, respectively.