KR100940683B1 - An apparatus for desiccating cured refractory on main iron through of blast furnace - Google Patents

Abstract

The present invention relates to an apparatus for drying a refractory constructed in a large hot water furnace of a blast furnace, and to a refractory automatic drying apparatus of a blast furnace large hot water which can improve the durability of the refractory by uniformly drying the refractory constructed in a large hot water furnace at a high temperature. It is about.

The present invention, the seating cover is seated on the large island; A main body and an auxiliary ignition device having an air and gas supply hole formed at an upper portion thereof and a main hot air balloon formed at a lower portion thereof and coupled to the seating cover, a thermometer disposed on the seating cover, and a main and auxiliary ignition device inserted into the main hot air outlet. A main hot air fan provided; An auxiliary hot air fan having an air and gas supply hole formed at an upper portion thereof and an auxiliary hot air balloon formed at a lower portion thereof, and having a second body coupled to a seating cover, and an auxiliary ignition device inserted into the auxiliary hot air outlet; And an operation panel electrically connected to the air, the air connected to the gas supply port, the air installed on the gas supply pipe, the gas supply automatic valve, and the thermometer.

Therefore, according to the present invention, the refractory is uniformly heated and dried to improve durability and the temperature is automatically adjusted to provide an effect of performing a refractory drying operation easily.

Blast furnace, large hot water, hot air, refractory, COG gas

Description

Refractory drying device of blast furnace large bath degree {AN APPARATUS FOR DESICCATING CURED REFRACTORY ON MAIN IRON THROUGH OF BLAST FURNACE}             

1 is a plan view showing a large hot water arrangement arrangement of the blast furnace;

2 is a perspective view of drying a refractory of a large hot water by a conventional COG burner;

Figure 3 illustrates the refractory drying apparatus of the blast furnace Daetangdo according to the present invention,

(a) is the overall plan view,

(b) is an overall side view;

Figure 4 shows the seating cover of the refractory drying apparatus of the blast furnace Daetangdo according to the present invention,

(a) is a side view,

(b) is a plan view;

5 is a view showing an auxiliary hot air blower of the refractory drying apparatus of blast furnace large hot water in accordance with the present invention,

(a) is a plan view,

(b) is a front view;

Figure 6 shows the main hot air blower of the refractory drying apparatus of the blast furnace large hot water in accordance with the present invention,

(a) is a plan view,

(b) is a front view;

Figure 7 shows the igniter of the refractory drying apparatus of the blast furnace large hot water in accordance with the present invention,

(a) is a partial section of the main igniter,

(b) is a sectional view of an auxiliary ignition device;

Figure 8 illustrates a drying mode of the refractory drying apparatus of the blast furnace large water in accordance with the present invention.

Explanation of symbols on the main parts of the drawings

10 ..... Seating cover 12 ..... Insertion 1

12a ..... protrusion 14 ..... 2nd insertion hole

30 ..... Main heat fan 32 ..... Body 1

34,54 ..... Air Supply 36,56 ..... Gas Supply

38 ..... Main hot air balloon 40 ..... Mounting plate

42 ..... Thermometer 50 ..... Auxiliary Heaters

52 ..... 2nd Body 58 ..... Secondary Hot Air Balloon

60 ..... Mounting Disc 70 ..... Control Panel

80 ..... Main ignition 92 ..... Auxiliary ignition                 

95 ..... Air supply manual valve 96 ..... Air supply automatic valve

97 ..... Gas supply manual valve 98 ..... Gas supply automatic valve

The present invention relates to an apparatus for drying a refractory constructed in a main iron through of a blast furnace, and more particularly, to durability of the refractory by uniformly drying the refractory constructed in a large hot water at a high temperature. The present invention relates to a refractory automatic drying apparatus for blast furnace large tap water that can be improved.

Large hot water is used to separate the melt discharged from the blast furnace outlet into molten iron and slag and flow out. The inside is provided with a refractory having excellent volume stability in cold and hot conditions.

As shown in FIG. 1, a plurality of large baths 102 are provided around the blast furnace 100 to allow the melt in the blast furnace 100 to be discharged through the outlet 100a. One of the 102 is used to repair the damaged large waterway 102 so as to prevent a decrease in productivity.

The large waterway 102 has a refractory 102a is installed in contact with the melt from the blast furnace 100, the refractory 102a is discharged from the blast furnace 100 to the large waterway 102 It serves to protect the large hot water 102 from the hot melt, which is deteriorated or eroded by the repetition of the melt, and thus is reinstalled in the large hot water 102.

In such a case, the installation of the refractory 102a made in the large waterway 102 removes the deteriorated or eroded refractory 102a from the large waterway 102 and then forms a mold (in the interior of the large waterway 102). C), and the refractory 102a is molded and dried after curing for a predetermined time (24 hours), wherein the drying conditions of the refractory 102a are closely related to the durability of the refractory 102a.

That is, when the temperature of the refractory 102a dried at a temperature of 400 ° C. is rapidly raised to 1200 ° C., a crack occurs in the refractory 102a. If the refractory 102a is not dried at a high temperature, the blast furnace 100 It can be seen that cracks occur upon contact with the melt (1500 ° C) in the shell.

In addition, when the refractory 102a molded and cured and constructed as described above is not sufficiently dried, when the melt in the blast furnace 100 contacts the refractory 102a, cracking occurs and local erosion occurs due to the melt. There existed a problem that the durability fell by this.

In addition, the refractory 102a constructed as described above had to increase its temperature step by step in order to prevent cracking during drying.

As shown in FIG. 2, conventionally, a COG burner 104 is mounted inside the refractory 102a to dry the refractory 102a formed and cured in the large waterway 102. 104 has a plurality of ejection openings 104a through which the supplied COG gas is ejected.                         

That is, by burning and burning the COG gas ejected from the ejection opening 104a formed in the COG burner 104, the refractory 102a constructed in the large bath 102 is dried, and the refractory 102a as described above. There is a problem that refractory drying operation of a certain condition is not performed by the operator to control the amount of COG (coke oven gas) supplied to the COG burner 104 while drying) according to the temperature in the large bath 102. .

Further, since the drying of the refractory 102a performed as described above is performed directly by the flame of the COG burner 104, even heating of the refractory 102a is difficult, so that there is a problem of only high temperature drying locally.

The present invention is to solve the conventional problems as described above, the object of the blast furnace is improved to dry the refractory uniformly by drying the refractory by hot air to dry and to automatically adjust the temperature in the large hot water It is to provide a refractory automatic drying device.

In order to achieve the above object, the present invention is an apparatus for drying a refractory constructed in blast furnace, the apparatus comprising: a seating cover seated on the large tap water; A cylindrical first body flange-coupled to the seating cover such that an air supply hole and a gas supply hole formed in an upper portion and a main hot air hole formed in a lower portion of the seating cover are respectively disposed above and below the seating cover, a thermometer disposed on the seating cover, And a main hot air fan having a main and an auxiliary ignition device inserted into the ignition device insertion hole formed in the main hot air balloon. A second cylindrical body that is flange-coupled to the seating cover such that an air supply hole and a gas supply hole formed at an upper portion and an auxiliary hot air balloon formed at a lower portion thereof are respectively disposed above and below the seating cover; An auxiliary hot air fan having an auxiliary ignition device inserted into the device insertion hole; And an operation panel electrically connected to an air supply pipe connected to the air supply port and a gas supply port, and an air installed on the gas supply pipe, and an automatic gas supply valve and a thermometer to provide a refractory drying apparatus for a blast furnace.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 shows a refractory drying apparatus of the blast furnace large bath according to the present invention, Figure 4 shows a seating cover of the refractory drying apparatus of the blast furnace large bath according to the present invention, Figure 5 is a blast furnace large bath according to the present invention Fig. 6 shows an auxiliary hot air blower of the refractory drying apparatus of FIG. 6, and FIG. 6 shows a main hot air blower of the refractory drying apparatus of the blast furnace large waterway according to the present invention, and FIG. 8 shows an igniter, and FIG. 8 shows a drying mode of the refractory drying apparatus of the blast furnace large waterway according to the present invention.

Figure 3 shows a refractory drying apparatus 1 of the blast furnace large hot water in accordance with the present invention, looking at its components in detail as follows.

The refractory drying apparatus 1 of the blast furnace large hot water road according to the present invention includes a mounting cover 10, a main hot air fan 30, an auxiliary hot air fan 50, and an operation panel 70. ) Is as follows.                     

As shown in FIG. 4, the seating cover 10 is a rectangular plate shape having a width that can cover the large bathway 102. The first insertion hole 12 and the circular shape of the through hole have a circular shape. The second insertion hole 14 is formed. The first insertion hole 12 has a protrusion 12a formed around the lower surface thereof, and the lower surface is coated with a refractory to withstand high temperature.

And, the main hot air fan 30 will be described as follows.

The main hot air fan 30 includes a first body 32, a thermometer 42, and main and auxiliary ignition devices 80 and 90. The first body 32 is shown in FIGS. 6A and 6B. As described above, the air supply port 34 and the gas supply port 36 are formed in a cylindrical shape.

As described above, the air supply pipes 34 and the gas supply pipes 36 formed at the upper end of the first body 32 have a flange portion 34a, such that the air supply pipe 46 and the gas supply pipe 48 are respectively flanged. 36a) is formed, and the main hot air balloon 38 communicating with the first body 32 is inclined downward in the opposite direction to the lower portion of the first body 32.

On the other hand, the inner side of the main hot air opening 38 is fixed to the disc is formed with a plurality of holes that gradually decrease in diameter coming from the outside to the inside so that hot air pressure increases when the hot wind hits the disc and sparks generated during combustion Do not touch this refractory directly.

6A and 6B, the first body 32 has a rectangular mounting plate 40 fixed to the body 32 and positioned above the main hot air balloon 38. The mounting plate 40 is seated on the protrusion 12a formed around the first insertion opening 12 of the seating cover 10 to be bolted to each other so that the seating cover 10 and the main hot air fan 30 may be coupled to each other. The bond is made.

On the other hand, on the mounting plate 40, the thermometer 42 is inserted and fixed to sense the temperature in the large waterway 102, the thermometer 42 is the seating to sense the temperature in the large waterway 102 A plurality may be additionally installed on the cover 10.

At this time, the main ignition device 80 and the auxiliary ignition device 90 are provided in the main and auxiliary ignition device insertion holes 38a and 38b formed by a tube inserted through the mounting plate 40 into the main hot air balloon 38. Is inserted and mounted, the structure of the main ignition device 80 and the auxiliary ignition device 90 will be described as follows.

As shown in FIGS. 7A and 7B, the main ignition device 80 is inserted into the cylindrical main body 82 and the main body 82 in which a gas injection port 82a and an air injection port 82b are formed at one side. It is composed of a spark plug 84 for generating an electric flame, the main ignition device 80 is the electricity generated from the spark plug 84 after the gas and air injected into the main body 82 is mixed By ignition by a flame, the mixture of air and gas in the main hot air balloon 38 is directly ignited.

In addition, the auxiliary ignition device 90 generates an electric flame by the spark plug 94 inserted into the body 92 of the cylinder 92 to indirectly ignite the mixture of air and gas in the main hot air balloon 38. This is to prevent unmixing the mixture of air and gas.

Meanwhile, the auxiliary hot air fan 50 having a structure similar to the main hot air fan 30 will be described below.

As shown in FIGS. 5A and 5B, the auxiliary hot air fan 50 includes a second body 52 and an auxiliary ignition device 90, and the second body 52 includes the first body 32. The cylinder is smaller in diameter and length and has an air supply port 54 and a gas supply port 56 formed thereon.

As described above, the air supply pipes 54 and the gas supply pipes 48 are flanged to the ends of the air supply port 54 and the gas supply port 56 formed at the upper portion of the second body 52, respectively. 56a) is formed in the lower portion of the second body 52, the auxiliary hot air balloon 58 in communication with the second body 52 is formed to be inclined downward.

On the other hand, as in the main hot air balloon 38, the secondary hot air balloon 58 is fixed to the inside of the secondary hot air balloon 58, which is formed with a plurality of holes gradually decreasing in diameter and hot air hits the disc. This increases and prevents the sparks from burning directly touching the refractory.

5A and 5B, the second body 52 has a mounting disc 60 fixed to the body 52 and positioned above the auxiliary hot air balloon 58. In addition, the mounting disc 60 is seated on the second insertion hole 14 of the seating cover 10 and bolted to form a coupling of the seating cover 10 and the auxiliary hot air fan 50.                     

At this time, the auxiliary ignition device 80 is inserted into and mounted in the auxiliary ignition device insertion port 58a formed by a tube inserted into the auxiliary hot air balloon 58 through the mounting disc 60.

3A and 3B illustrate the refractory drying apparatus 1 of the blast furnace large hot water structure configured as described above, wherein the air supply ports 34 and 54 and the gas formed on the first and second bodies 32 and 52 are formed. Air supply pipes 46 and gas supply pipes 48 are branched and flanged to supply ports 36 and 56, and an air supply fan 44 connected to supply air to the air supply pipes 46 has the seating cover 10. It is fixed on).

In addition, the air supply manual valve 95 for controlling the flow of air and gas on the air supply pipe 46 and the gas supply pipe 48 branched to supply air into the first and second bodies 32 and 52, and air. A supply automatic valve 96, a gas supply manual valve 97, and a gas supply automatic valve 98 are installed, and the valves 95, 96, 97, 98 and the thermometer 42 have the seating cover. It is electrically connected to the operation panel 70 fixed on the (10).

Referring to the operation of the refractory drying apparatus 1 of the blast furnace large hot water configured as described above are as follows.

When the molding of the refractory in the large bath is completed, after passing through natural curing for a predetermined time (24 hours) to remove the mold and cover the top of the large bath 102 (not shown) and refractory drying of the blast furnace large bath according to the present invention The main hot air opening 38 is mounted to the seating cover 10 so as to face the longitudinal direction of the large hot waterway 102. That is, as shown in FIG. 3b, the main hot air fan 30 and the auxiliary hot air fan 50 are disposed above the seating cover 10, and the main hot air blower 38 and the auxiliary hot air are disposed under the seating cover 10. Since only the sphere 58 is disposed on the lower surface of the seating cover 10, it is possible to prevent the main hot air blower 30 and the auxiliary hot air blower 50 from being thermally damaged by the spark generated during combustion, without any additional protective means.

When the upper portion of the large waterway 102 is closed by the refractory drying apparatus 1 and the cover (not shown) of the blast furnace large waterway as described above, the air supply manual valve 95 is opened, which is the air supply fan 44. By supplying air into the first and second bodies 32 and 52 by means of), it is to prevent gas explosion during ignition by the main ignition device 80 or the auxiliary ignition device 90.

That is, as described above, when the refractory drying apparatus 1 of the blast furnace large waterway is seated on the large waterway 102, the worker by the operation panel 70 constructs the refractory material 102a in the large waterway 102. The refractory drying apparatus 1 of the blast furnace large hot water is operated so that drying of the refractory 102a is started by the refractory drying mode set in the operation panel 70.

The refractory drying mode (A, B, C, D) is to increase the temperature gradually over time, as shown in Figure 8, which is the hot water due to the rapid temperature rise during drying of the refractory It is to prevent the thermal shock of the refractory in the island.

The air supply fan 44 is operated when the air supply manual valve 95 and the gas supply manual valve 96 are opened and the refractory drying apparatus 1 of the blast furnace is operated by the operation panel 70. In addition, power is applied to the main ignition device 80 to generate a spark. At this time, gas and air are supplied to the main ignition device 80 by a branch branched from the air supply pipe 48 and the gas supply pipe 48. And ignite.

At this time, the gas supply automatic valve 35 installed in the gas supply pipe 48 is opened to 30% or less by the operation panel 70 to supply the gas into the first and second bodies 32 and 52. Combustion starts in the main hot air balloon 38 and the auxiliary hot air balloon 58, and the operation panel 70 applies power to the auxiliary ignition device 90 at this time to assist the main hot air balloon 38 and the auxiliary hot air balloon 38. Unburning in the hot air balloon 58 is prevented.

Subsequently, when the air supply automatic valve 96 is opened at 10% or less to supply air, hot air is generated by mixing and combusting oxygen and gas in the main hot air vent 38 and the auxiliary hot air vent 58.

When hot air is generated in the main hot air balloon 53 and the auxiliary hot air balloon 63 as described above, the hot air supplied from the main hot air balloon 38 is supplied in the longitudinal direction of the large hot waterway 102, and the auxiliary hot air is The hot air supplied from the sphere 58 supplies hot air to a portion where the hot air is not supplied by the main hot air balloon 38 to dry the refractory 102a constructed in the large hot waterway 102.

As described above, opening the gas supply automatic valve 98 to 30% or less and opening the air supply automatic valve 96 to 10% or less is initially maintained at 150 ° C. for 24 hours according to the drying mode shown in FIG. 8. Afterwards, the refractory 102a in the large waterway 102 is automatically dried by automatically adjusting the valve according to the drying mode and raising the temperature step by step.

That is, after a predetermined time has elapsed, the temperature signal in the large waterway 102 detected by the thermometer 42 fixed and inserted into the mounting plate 40 is transmitted to the operation panel 70, and according to the drying mode. The refractory 102a is automatically dried in accordance with the drying mode by adjusting the open / close state of the gas supply automatic valve 98 and the air supply automatic valve 96 to adjust the temperature in the large water supply 102.                     

The refractory drying apparatus 1 of the blast furnace large turbidity according to the present invention described above uses COG gas, but other gases may be used.

According to the present invention as described above, by heating the refractory (102a) constructed in the large turbidity (102) by hot air uniformly to improve the durability of the refractory (102a) and the temperature in the large turbidity (102) By adjusting automatically, it is possible to obtain an effect of easily carrying out a refractory drying operation under a certain condition.

While the invention has been shown and described with respect to particular embodiments, it will be appreciated that the invention can be varied and modified without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

Claims (2)

In the apparatus for drying the refractory 102a constructed in the blast furnace 102, A seating cover 10 seated on the large bathway 102; The air supply hole 34 and the gas supply hole 36 formed in the upper portion are disposed on the upper portion of the seating cover 10, and the main hot air holes 38 formed in the lower portion thereof are disposed in the lower portion of the seating cover 10. Ignition device insertion hole 38a formed in the cylindrical first body 32 that is flanged to the top of the seating cover 10, the thermometer 42 disposed on the seating cover 10, and the main hot air opening 38 A primary hot air fan (30) having a main and auxiliary ignition device (80,90) inserted into the; The air supply port 54 and the gas supply port 56 formed in the upper portion is disposed in the upper portion of the seating cover 10 and the auxiliary hot air balloon 58 formed in the lower portion is disposed in the lower portion of the seating cover 10. Auxiliary hot air blower having a cylindrical second body 52 flanged to an upper portion of the seating cover 10 and an auxiliary ignition device 90 inserted into the ignition device insertion port 58a formed in the auxiliary hot air opening 58. 50; And Air and gas supply automatic valves 96 and 98 and thermometers 42 installed on the air supply pipes 46 and the gas supply pipes 48 connected to the air supply ports 34 and 54 and the gas supply ports 36 and 56. Refractory drying apparatus of the blast furnace large bath comprising a; operating panel (70) electrically connected to. The refractory drying apparatus according to claim 1, wherein two main hot air openings (38) which are inclined downward to face in opposite directions to each other are formed in the lower part of the first body (32).

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