KR100431854B1 - Refractory set for tapping hole of blast furnace and stacking method thereof - Google Patents

Abstract

The present invention relates to a set of tapping outlets forming the tapping hole of the blast furnace and its construction method, by minimizing the wood portion (seam) part in the tapping outlets and preventing the penetration of the molten iron inside the blast furnace is made stable The present invention relates to an improved blast furnace outlet set and its construction method to reduce maintenance cost by preventing the collapse of the set lead due to lead and oxidation.

According to the present invention, a plurality of cylindrical carbon wires each having a wire flow path formed at the center thereof are coaxially connected to form a wire opening, and the base wires are in close contact with each other up and down outside the carbon wires. Provides a blast-furnace outlet set kite which is arranged with a plurality of stationary kites by round-round surface contact, and a method for constructing the blast furnace outlet set kite using the same.

Description

REFRACTORY SET FOR TAPPING HOLE OF BLAST FURNACE AND STACKING METHOD THEREOF}

The present invention relates to a starter set kite and forming method for forming the outlet of the blast furnace, and more specifically, to minimize the wood portion (seam) part in the seter outlet tiered to prevent the penetration of the molten iron inside the blast furnace stable outgoing The present invention relates to an improved blast furnace outlet set and its construction method to achieve a reduction in maintenance costs by allowing work to be performed, extending the life of the blast furnace, and preventing the collapse of the set lead due to lead and oxidation.

In general, the blast furnace is as shown in Figure 1, which melts and reduces the iron ore charged therein in a high pressure and reducing atmosphere to produce a molten iron (pig iron), which is disposed on the lower side of the blast furnace 100 Discharge to the outside through the outlet 110. Due to the characteristics of the blast furnace operation, the internal refractory is gradually worn and eroded by the flow of hot air and reducing gas and molten iron supplied to the tuyere (not shown).

Therefore, the outlet 110 in which the flow of the molten iron is concentrated is blast furnace operation under high temperature and high pressure conditions, so the set edge 120 of the outlet 110 is worn out by the high temperature and high specific concentration of the molten iron. It is erosion and chemical reactions that cause the damage of the lead faster than that of other parts.

Therefore, in the tapping opening 110, the refractory made of the set lead 120 is constructed on the inner surface of the side wall of the blast furnace 100, and when the tapping work is performed, the taping opening 130 is formed by opening it as an opener (not shown). The molten iron is to be discharged to the outside.

A conventional outlet set edge 120 is shown in FIGS. 2 and 3. Conventional outlet set yeonwa 120 is divided into a top set yeonwa 122 and a lower set yeonwa 124 to form one circular taping flow path 130, and joining them up and down the outlet 110 ).

However, the formation of the tap opening 110 according to the related art is that the wood portion (kite and joint) 133 is formed at the kite and connecting portion forming the taping flow path 130, and more as the kite construction progresses. The wood portion 133 is formed, and the formation of such excessive wood portion 133 causes loosening of the outlet 110 during the blast furnace operation, and the outflow of the high pressure gas inside the blast furnace is made when the impact occurs. Inflow of the molten iron material 150 through 133 reduces the normal fire resistance function of the lead opening and the set 120.

The outlet set yeonwa red 120 is a hammer, drill, blowing function of the opening machine (not shown) in the process of excavating the mud (filling material) filled in the outlet 110 for the discharge of the molten iron 150 Opening work is carried out in total, such work will impact the outlet 110, the cracks of the outlet 110, the loosening of the lead and wood portion 133, the hot melt in the furnace 100, the high temperature reducing properties According to the formation of the flow path of the gas becomes vulnerable, due to the collapse of the outlet set yeonwa 120 will cause the load of the starting work.

If the molten iron flow path is formed in the wood part 133 of the middle outlet 120 of the outlet 110 by the erosion of the lead 110 at the outlet 110, the outlet 110 set the edge 120 Due to the difference in specific gravity of the molten iron 150, the injuries of the eruption (浮上) results. In addition, when the molten iron flows between the mud material filled in the outlet 110 at the closing of the outlet 110 to form a blood layer, it becomes impossible to excavate during the next departure. In addition, the molten iron is scattered due to the gas ejection during the departure, thereby increasing the risk of causing a safety accident in the blast furnace column facilities and workers.

In this case, when the exit opening 110 is closed, there is a method of filling the outlet opening 110 with a large amount of mud material to fill the portion where the molten iron flow path is generated. It is impossible to penetrate and penetrate the charter flow channel, which is only a temporary measure. In addition, after closing of the outlet 110, the molten iron flowed into the molten iron flow passage in the middle of the outlet port is solidified in the outlet port 110 to form a blood layer, the obstacle of the excavation opening work of the outlet 110 at the next departure As a factor, the opening work is delayed, and it is adversely affected by the columnar work by dissolving it with oxygen.

On the other hand, the conventional outlet set yeonwa 120 as described above is made of the outlet of the high-pressure gas in the blast furnace through the outlet 110. In the conventional kite 120 constructed as described above, as the number of years of operation increases, cracking and relaxation of the wood portion 133 connected to the outlet 110 by heat load and wear erosion are inevitably generated. In this case, even if the depth of the outlet 110 is formed in the innermost part of the blast furnace 100, the loosening, cracking, and injuring the set edge 120, which is the middle portion of the outlet 110, may occur. In the middle of the eruption will generate a high-pressure reducing gas eruption.

Therefore, such a phenomenon that occurs in the state in which the molten iron inside the blast furnace 100 is not discharged, may cause the scattering of the molten iron 150 and the closing of the outlet 110 becomes impossible or the molten iron 150 This is the maximum risk factor for work that needs to be closed early when the release of the tank is not complete. In addition, deterioration and erosion of the outlet set lead 120 increases the inflow of the molten iron 150, and causes the problem of causing the collapse of the outlet set lead 120 while destabilizing the inside of the outlet 110. will be.

That is, in such a case, the blast furnace 100 is ventilated to excavate and remove the entire duct 120 of the outlet 110, build a duct and then press-fit the press-fit with a press-fit nipple (not shown) attached to the steel shell. I am trying a solution. However, since it has heterogeneous physical properties between the other parts constructed during the construction of the blast furnace and the newly constructed parts, it is impossible to achieve the same level of perfect construction as the initial set and 120 constructions. The problem of re-disintegration is also generated.

The present invention is to solve the conventional problems as described above, the object is

Minimize the wood part (joint) part of the set of exit port to prevent the penetration of molten iron inside the blast furnace through the wood part to ensure stable starting work, and to prevent deterioration and erosion of the set of exit port and prevent erosion The present invention provides an improved blast furnace outlet set smoke and its construction method to reduce maintenance cost by preventing the collapse of the set smoke caused by lead and oxidation.

1 is a cross-sectional view showing a part of the exit of a typical blast furnace;

Figure 2 is a detailed view showing the set edge and the cross section of the blast furnace outlet according to the prior art;

3 is an exploded view showing the set edge of the blast furnace outlet according to the prior art;

4 is a cross-sectional view showing the blast furnace outlet set yeonwa in accordance with the present invention;

5 is an exploded perspective view showing the blast furnace outlet set yeonwa in accordance with the present invention;

Figure 6 is a configuration of the carbon lead is provided in the blast furnace outlet set lead according to the present invention

As

a) is a block diagram of the first carbon edge mounted on the outermost side of the exit,

b) is a block diagram of the second carbon edge mounted in the middle of the exit port,

c) is a configuration diagram with the third carbon edge is mounted on the innermost side of the exit port;

Figure 7 shows the blast furnace outlet set yeonwa in accordance with the present invention in an overall cross-section

It is a block diagram.

Explanation of symbols on the main parts of the drawings

5 ..... Starting Euro 7 ..... Connecting Home

10 ..... carbon lead and 12 .... protruding step

20 ..... base and 24 .... concave

26 ..... round face 30 ...

32 ..... concave 100 ... blast furnace

110 .... outlet 120 ... setyeonwa

130 .... Wood 150

In order to achieve the above object, the present invention, in the set lead to form the exit port of the blast furnace, by forming a tap opening by connecting a plurality of cylindrical carbon lead formed in each of the outlet flow path in the coaxial, the carbon Base yeonwa is in close contact with the outside of the yeonwa, and the outer side of the base yeon is provided by the blast furnace outlet set yeonwa characterized in that a plurality of fixed yeonwa is arranged in contact with the rounded round surface.

Moreover, in this invention, in the construction method with the set lead which forms the tap hole of a blast furnace,

Forming a semi-circular groove on the upper surface and constructing the lower base pontoons having rounded round surfaces on both sides thereof according to the exit center line;

Constructing fixed edges on both sides of the lower base edges, respectively;

Coaxially connecting and mounting a plurality of cylindrical carbon kites, each of which has a discharge channel formed at the center thereof, as a connection groove of the lower base kite;

Forming a semi-circular groove on the lower surface to surround the carbon wires, and forming the upper base wires having rounded round surfaces on both sides to coincide with the upper ends of the carbon wire and the lower base wires; And,

By constructing the fixed yoke respectively on both sides of the upper base yoke; blast furnace opening set characterized in that it comprises;

Hereinafter, the present invention will be described in more detail with reference to the drawings.

As shown in FIGS. 4 and 5, the outlet set edge of the blast furnace according to the present invention, as shown in FIGS. 4 and 5, by connecting the plurality of cylindrical carbon lead 10 formed in each of the outlet passage 5 in the center coaxially The outlet 110 is formed.

The carbon lead 10 is provided with three different structures as shown in FIG. As shown in FIG. 6A, the first carbon edge 10a positioned at the outermost side of the blast furnace outlet 110 of the carbon edge 10 has a cylindrical structure in which a wire passage 5 is formed therein. And a connecting groove 7 having a diameter larger than that of the starting channel 5 in the rear end surface.

In addition, the second carbon edge 10b coaxially coupled to the first carbon edge 10a has a cylindrical structure having a starting line 5 formed therein, and is connected rearwardly of the first carbon edge 10a. A convex stepped portion 12 is inserted into the groove 7 and fixed to the front edge thereof, and at the rear edge thereof, a connection groove 7 corresponding to the connection groove 7 of the first carbon edge 10a is formed. have. These second carbon edges 10b are arranged in a row, so that the second carbon edge 10b can be formed in the same length as each other and can form a long length of flow path 5.

In addition, a third carbon edge 10c positioned at the innermost side of the blast furnace outlet 110 is provided, and the third carbon edge 10c has a cylindrical structure in which a discharge passage 5 is formed therein. A convex step 12 which can be inserted into the connecting groove 7 of the second carbon edge 10b is formed at the front edge thereof.

Therefore, the first to third carbon edges 10a, 10b, and 10c as described above are coaxially coupled to each other so that one long wire passage 5 is formed to form the wire outlet 110.

In addition, the base edge 20 is in close contact with the carbon edge 10 outside the upper and lower bars 10, the base edge 20 is as shown in detail in Figure 5, each side of the carbon edge 10 Concave grooves 24 of semi-circular cross section into which they are seated are formed, the lower surface of which forms a flat surface, and both sides of which form a convex rounded round surface 26. The concave grooves 24 have the same curvature as the outer surface of the carbon lead 10 and when the upper and lower base edges 20 face each other and coincide with each other, the carbon lead inserted into the inner concave grooves 24 ( 10) they will be completely wrapped.

And, the planar surfaces of the base kites 20 form a base surface that can be properly constructed with the kites arranged around them, respectively, and the rounded round surfaces 26 of both sides are shown in FIG. The base curvature 20 has a round curvature R within about 5% of the height L.

In addition, a plurality of fixed edges 30 which are in surface contact with the rounded round surface 26 are disposed outside the side edges of the base edge 20, and the fixed edges 30 are rounded on both sides of the base edge 20. The concave round surface 32 is formed to coincide with the round surface 26 and is coupled to the base edge 20. The rounded round surfaces 26 and 32 may be effectively resisted even when vertical displacement occurs between the fixed edge 30 and the base edge 20, and at the same time, the molten iron may be used as the surface contact portion. Even when the inflow of 150 is made, the inflow resistance can be increased due to a longer flow path.

On the other hand, in the construction method of the present invention for constructing the set kite (1) forming the outlet port 110 of the blast furnace as described above, first the lower base kites 20 to form the outlet port 110 (110) The step of constructing in a row in accordance with the center line (reference line) is made, therefore, the semi-circular grooves 24 are formed in a line on the upper surface of the lower base edge 20.

And, the step of building the fixed edge 30 to each side of the lower base edge 20 is made, in this case the fixed edge and in accordance with the rounded round surface 26 on both sides of the lower base edge (20) ( The concave round faces 32 of the 30 are fixed in a matched state.

In addition, a step of coaxially connecting the plurality of cylindrical carbon lead 10 to the concave groove 24 of the lower base edge 20 is made, the carbon lead 10 is first, the carbon lead 10 The first carbon edge 10a located at the outermost side of the blast furnace outlet 110 is first mounted, and the second carbon edge 10b is connected to the rear connection groove 7 of the first carbon edge 10a. The convex step 12 is inserted and fixed, and then the second carbon edges 10b are arranged in a row so as to form the starting line flow path 5 having the same length as each other.

At the innermost side of the outlet 110 of the blast furnace, a third carbon edge 10c having a convex step 12 which can be inserted into the connecting groove 7 of the second carbon edge 10b at its front edge is finally formed. It is inserted and completes the starting route 5. Accordingly, the first to third carbon edges 10a, 10b, and 10c as described above are coaxially coupled to each other to form one long outlet 110 as the outlet passages 5 connected to each other.

Next, the step of forming the upper base yeon 20 to match the top of the carbon yeon 10 and the lower base yeon 20 so as to surround the carbon yeon 10, the upper base yeon 20 By forming the semi-circular groove 24 in the lower surface of the carbon foil 10 is completely wrapped from the outside.

And, finally, the step of building the fixed edges 30 to be disposed on both sides of the upper base yeon 20 and firmly fixed, respectively, and in this step, both sides of the upper base yeon 20 round surface ( 26, the concave round surfaces 32 of the fixed edge 30 are fixed in surface contact.

The blast furnace opening set set (1) and the construction method of the present invention configured as described above is the wood portion 133 because the first to third carbon lines (10a) (10b) (10c) each has a cylindrical structure Is minimized so that inflow and leakage of the molten iron 150 is minimized, and the molten iron 150 is an intermediate portion of the outlet 110 because the molten iron 150 is integrally connected to each other through the connecting groove 7 and the convex step 12, respectively. When introduced into, it is to stay in the connection to solidify. Therefore, the inflow and leakage of the molten iron 150 can be minimized.

In addition, since the upper and lower base edges 20 are constructed to completely cover the carbon edge 10 from the outside, the carbon edge 10 is protected from external impact and the inflow and leakage of the molten iron 150 is minimized. .

According to the present invention as described above, since the carbon lead 10 is each having a cylindrical structure, minimize the wood portion (seam) part in the outlet set set (1) blast furnace 100 through the wood portion 133 By preventing the penetration of the molten iron inside, it is possible to achieve a stable drawing work, and by constructing the structure of the carbon lead 10 and the upper base lower edges (20) enclosed, to prevent the deterioration and erosion of the lead set lead (1) By extending the life of the blast furnace and preventing the collapse of the set lead due to the lead and oxidation, it is possible to obtain an improved effect to reduce the maintenance cost.

Claims (4)

In the set edge forming the tap hole 110 of the blast furnace, Coaxially connecting a plurality of cylindrical carbon lead 10 formed in each of the outlet passage 5 in the center to form a tap hole 110, and the base lead 20 up and down outside the carbon lead 10 (10) Is closely adhered to, and the side edge of the base yeon (20) round circumferential surface (26) (32) in contact with the set blast furnace opening characterized in that a plurality of fixed yeondae 30 is arranged. The method according to claim 1, wherein the carbon lead 10 has a cylindrical structure having a tapping flow path 5 therein, the rear end has a connection groove 7 having a diameter larger than that of the tapping flow path 5; The first carbon edge 10a formed and the convex step 12 inserted into and fixed to the rear connection groove 7 of the first carbon edge 10a are formed at the front edge thereof, and the first edge at the rear edge thereof. The second carbon edge 10b and the second carbon edge 10b having a cylindrical structure forming a connection groove 7 corresponding to the connection groove 7 of the carbon lead 10a and having a starting line 5 therein. And a third carbon edge 10c having a cylindrical structure having a convex stepped portion 12 inserted into the connecting groove 7 at the front end thereof, and having a starting flow path 5 formed therein. To 3rd carbon edge (10a) (10b) (10c) are combined with each other coaxially to form a long outlet port 110, characterized in that the blast furnace outlet set yeonwa. 2. The blast furnace outlet set edge according to claim 1, wherein the rounded rounded surfaces (26) on both sides of the base edge (20) have a round curvature R within about 5% of the height L of the base edge (20). In the construction method with the set lead to form the exit port 110 of the blast furnace, Forming a semi-circular groove 24 on the upper surface, and matching the lower base edges 20 having the rounded round surfaces 26 to both sides to match the center line of the outlet 110; Constructing each of the fixed edges 30 on both sides of the lower base edges 20; Coaxially connecting and mounting a plurality of cylindrical carbon kites (10), each having a discharge channel (5) formed at the center thereof, into the concave grooves (24) of the lower base kites (20); Semi-circular grooves 24 are formed on the lower surface to surround the carbon wires 10, and the upper base wires 20 having rounded round surfaces 26 on both sides are formed of the carbon wires 10 and the lower base wires 20. Building according to the top of the); And, A method of constructing a blast furnace opening set including the; characterized in that the step of building each of the fixed edges (30) to both sides of the upper base edges (20).