KR101417547B1 - Stave, blast furnace, and blast furnace operation method - Google Patents

Abstract

Wherein the stave includes a stove main body made of copper or a copper alloy having a reference surface facing the internal space of the blast furnace and a stave installed at the inner periphery of the blast furnace portion of the blast furnace, And a plurality of protrusions protruding toward the inside.

Description

Stave, blast furnace and blast furnace operation method {STAVE, BLAST FURNACE, AND BLAST FURNACE OPERATION METHOD}

The present invention relates to a stove, a blast furnace equipped with the stove, and a method of operating the blast furnace.

The present application claims priority based on Japanese Patent Application No. 2009-263589 filed on November 19, 2009, the contents of which are incorporated herein by reference.

In the existing blast furnace, a stave is provided on the inner side of the iron core, and a structure in which the refractory bricks are provided on the inner side is used. The inner surface of the blast furnace is exposed to the charge falling down the furnace while receiving the high temperature in the furnace, and is subjected to mechanical damage. Then, after the refractory bricks are lost in a certain period of time, the surface of the stave is damaged. In order to cope with such damage and malfunction, a structure in which a recess is arranged on the inner surface of the stove and the refractory is sandwiched in the recess is developed (refer to Patent Document 1).

Japanese Patent Application Laid-Open No. 2001-49316

In the inner surface of the blast furnace, the bosh portion and the furnace belly portion, a hot welded portion (a region where the ores in the charge are started to soften and melt and the ores in the semi-molten state are fused to each other and connected to each other in plate form) In particular, due to high temperature or mechanical damage. With respect to such a hot welded joint, the above-described refractory of the inserted refractory does not have sufficient durability.

It is an object of the present invention to provide a visibility portion capable of achieving high durability even at the root portion of a high temperature welded joint, a stove installed in the furnace portion, and a method of operating a blast furnace and a blast furnace provided with these staves.

The present invention is based on the knowledge obtained as a result of the study of the inventors of the present invention, that is, the knowledge that the deposit layer has a protective action against heat load and hand damage due to the root portion of the fusing belt (self lining effect).

Refractory bricks installed in the inner side of the corona at the relatively early period of about 2 to 3 years from the ignition in the furnace 1 life of about 15 years, usually from ignition of the blast furnace to fire extinguishment, After disappearance by the mother, an adherent layer originating from the charge is formed near the stave surface on the inner side of the furnace. According to the present invention, there is provided a structure for promoting generation of an adherent layer (adherent) covering the surface of a stave, based on the above-described knowledge, wherein a protruding portion protruding inwardly from the furnace is used on the inner stave of the blast furnace, This high heat-generating copper or copper alloy is used as the material of the stave body.

The present invention solves the above-mentioned problems and adopts the following means in order to achieve this object. The concrete configuration is as follows.

(1) A stave according to an aspect of the present invention is a stave installed in the inner periphery of a hearth portion of a blast furnace and a furnace portion, and a stave body made of copper or a copper alloy having a reference surface facing the inner space of the blast furnace And a plurality of protrusions protruding from the reference surface toward the inside of the blast furnace.

In such a stave, the protruding portion protruding inward from the reference surface, when the fused portion of the charge falls down in the blast furnace, is constituted by the reference surface of the stave body as the inner surface of the blast furnace. The softening and melting of the ore is started and the ore in the semi-molten state is fused to each other and connected in a plate shape) is decelerated. Thereby, the adhering material is cooled and the adherend can be grown along the reference surface of the stave body, so that the reference surface can be covered with the adherend. As a result, since the adherend acts as the protective layer, the reference surface is not directly exposed to the hot-melt welding belt, and the heat resistance as the stitch for the viewing and anteroposterior part can be improved.

Particularly, in the present stove, a stove main body made of copper or a copper alloy having high heat conductivity and high heat generating ability is used. Thereby, even if the coating on the reference surface is peeled off due to a change in the operating condition of the blast furnace or the like, the charge including the ore in the semi-molten state falling thereafter is decelerated. The charge is rapidly cooled and attached to the reference surface, so that the coating layer of the deposit can be regenerated at an early stage. By virtue of the self-lining effect using such attachments, sufficient durability can be obtained as the stitches for the eyes and for the obese part.

(2) The stove according to (1) above is provided with a stave body cooling flow passage which is provided inside the stave body and flows a fluid for cooling the stave body, and a stave body cooling flow passage provided inside the projecting portion, And a protruding portion cooling flow path for flowing a fluid for cooling the protruding portion.

In the present stave, since the stave body is made of copper or a copper alloy having high heat conductivity and high heat generation ability, the projections are sufficiently cooled by only the stave body cooling flow path inside the stave body. However, it is also possible to form the protruding portion cooling passage inside the protruding portion and directly cool the protruding portion, thereby lowering the temperature of the surface and further promoting the formation of adherend.

(3) The stove according to (1) above, further includes a plurality of stave body temperature detecting portions disposed inside the stave body along the reference surface, and a protruding portion temperature detecting portion disposed inside the protruding portion .

In such a stave, the thickness of the deposit layer on the reference surface of the stave body and the remaining thickness of the stave body are estimated based on the detected temperature detected by each temperature detector. Thus, the soundness of the stave body and the profile of the furnace can be judged. Based on the determination result, the cooling state of the stave or other parameters are adjusted to appropriately grow the deposit, and the thickness of the deposit layer on the reference surface of the stave body is appropriately adjusted. As a result, it is possible to protect the stave body against thermal load and hand damage, prevent deterioration of the profile in the furnace due to excessive adherend growth, and stabilize blast furnace operation by maintaining a proper profile.

(4) In the stave described in the above (1), it is preferable that a distance between the adjacent projections is within a range of 500 to 1000 mm.

If the distance between the adjacent protruding portions is wider than 1000 mm, an adherend formed and attached starting from the protruding portion can not be created and attached to the vicinity of the protruding lower end portion on the high position side. As a result, it is impossible to uniformly form a deposit layer having a predetermined thickness over all reference planes between adjacent protrusions. As a result, the self-lining effect for protecting against heat load and mechanical damage due to the root portion of the fusing belt can not be sufficiently obtained. That is, it becomes difficult to protect the stave body.

When the distance between the adjacent protrusions is smaller than 500 mm, the charge including the ores in the semi-molten state falling between the adjacent protrusions is decelerated, and the thickness of the deposit layer formed on the reference surface by cooling becomes excessively thick . If the deposit layer is excessively thick, it may cause a problem of a stable drop of the charge, or may cause a large change in the inner surface profile of the view portion and the furnace portion when the deposit layer is peeled off due to a change in operating conditions of the blast furnace. Therefore, it is not desirable to maintain stable operation of the blast furnace.

(5) In the stave according to (4), the projecting portion is provided so that the relationship between the projecting amount E1 from the reference plane and the interval D1 between adjacent projecting portions satisfies the following expression (A) And the projecting portion is preferably provided on the furnace portion so that the relationship between the projecting amount E2 from the reference plane and the spacing D2 between adjacent projecting portions satisfies the following expression (B).

Wherein? 1 is an inclination angle of the attachment adhered to the reference surface in the viewing portion, and? 2 is an inclination angle of 85 to 88 degrees of inclination of the adherend adhering to the reference surface in the walk portion, Is an angle of inclination of the stave used in the viewing portion of 77 to 82 and? 2 is an inclination angle of the stave used in the burning portion is 90.

In the present invention, a typical charge includes an ore-based charge having a particle size of 8 to 25 mm and a coke-based charge having a particle size of 20 to 55 mm, which are alternately layered in the blast furnace, The inclination angle? 1 becomes constant at approximately 75 占 In the case of the stave installed at the view portion provided near the base of the fused strip of the charge to be charged, The above-mentioned? 1 is an inclination angle of the viewing portion of the blast furnace, and? 1 is designed in the range of 77 to 82 degrees in a normal furnace. In the case of the stove installed on the furnace portion, the inclination angle [theta] 2 is empirically estimated to be about 85 to 88 degrees, and the inclination angle [alpha] 2 of the furnace portion is 90 degrees.

In the main stave, the protrusions E1 and E2 and the intervals D1 and D2 of the protrusions of the stave disposed at the view portion and the stave portion provided at the vent portion are set so as to satisfy the relationships defined by the above formulas (A) and (B) Whereby the charge including the ore in the semi-molten state to descend the furnace is decelerated, cooled, and attached to the reference surface R. As described above, the entire surface of the reference surface R can be efficiently covered by the growing deposit layer, and the stave body can be sufficiently protected against thermal load and hand damage.

Further, by providing the protrusions E1 and E2 and the protrusions D1 and D2 of the protrusions of the stave disposed in the view portion and the protrusion of the stator so as to satisfy the relations defined by the above formulas (A) and (B) It is possible to prevent the deposit layer in the layer (R) from growing excessively thick. Further, when the deposit layer is peeled off due to changes in the operating conditions of the blast furnace, the profile of the furnace inner surface of the furnace portion and the furnace portion is prevented from being largely changed, and operational troubles such as deterioration of the charge of the furnace during blast furnace operation are avoided , It is possible to continue stable operation of the blast furnace over a long period of time.

The protruding amounts E1 and E2 of the protrusions of the stave disposed at the view portion and the stave portion provided at the protruding portion are set such that the distance D1 between adjacent protrusions of each stave within the range of 500 to 1000 mm, And D2 are set, these values are set from these D1, D2 and the above formulas (A) and (B).

Since the protruding portions of the staves of the viewing portion and the furnace portion protrude inward from the reference surface, they are likely to be worn out due to heat or abrasion from the high-temperature charging object. In order to sufficiently exhibit the effect of improving the durability due to self-lining of the stave body from the balance between the maternal speed of the protruding portion due to the high-temperature charge and the growth rate of the deposit on the reference surface by the protruding portion, It is preferable that the protruding amounts E1 and E2 from the reference surface R of the protrusion are 50 to 150 mm in any of the staves of the abdomen.

(6) In the stave described in (1), it is preferable that the protrusions are provided continuously or intermittently along the circumferential direction in the blast furnace.

In such a stave, it is easy to appropriately maintain the circumferential balance in the blast furnace by the protruding portion continuously provided around the entire periphery along the circumferential direction in the blast furnace, so that the operation of the blast furnace can be satisfactorily maintained.

Further, the projections in the stave may be arranged intermittently (intermittently) in the circumferential direction of the blast furnace 1. In this case, various geometric patterns such as a lattice shape and a zigzag shape can be employed, but it is preferable that they are symmetrically arranged in consideration of circumferential balance.

(7) In the stave described in (1), it is preferable that a plurality of grooves are formed on the reference surface.

In such a stave, it is possible to prevent heat in the blast furnace from escaping to the blast furnace by forming a plurality of grooves on the reference surface.

(8) In the stave described in (7), it is preferable that a refractory is provided on both of the concave portion formed by the reference surface and each of the protruding portions and on both sides of the groove.

In such a stave, it is possible to prevent the stave body and the projection from being damaged by providing refractory in the recess and groove. Further, the profile of the inner surface of the blast furnace can be easily formed into a desired shape.

(9) A blast furnace according to an aspect of the present invention includes the stave described in any one of (1) to (8).

Here, it is preferable that the stave installed in each of the blind portion and the furnace portion of the blast furnace according to the embodiment of the present invention is provided at a portion exposed from the lower portion of the shaft portion of the blast furnace to the root portion of the furnace portion or the welding portion Do.

In such a blast furnace, by providing a stave at a portion exposed to a high temperature by the root portion of the welded portion and the furnace portion, particularly at the welded portion, it is possible to obtain a stable furnace from ignition Even after the refractory bricks installed on the inner side of the furnace are lost due to thermal shock or mechanical damage during a comparatively early period of about 2 to 3 years, thereafter, charges are adhered to the reference surface of the stave body to form an adherent layer can do. Thereby, it is possible to obtain the effect (the self-lining effect) that the deposit layer protects against thermal load and hand damage caused by the root of the fusing belt.

Further, in the conventional blast furnace portion and furnace portion, damage and deterioration of the refractory brick and stave due to high temperature at the root portion of the fusing bed are liable to proceed during the operation period of about 15 years from the ignition of the blast furnace to the fire extinguishing. As a result, when a sudden change in the profile of the furnace occurs, stable furnace operation becomes difficult.

On the other hand, the blast furnace according to one aspect of the present invention has a copper or copper alloy stave body having a high thermal conductivity and a high heat generating ability, and has a protruding portion protruding inward from the reference surface, A stave is provided at each of the portions exposed to the high temperature by the root portion of the fused band in the fused band. This makes it possible to generate the deposit layer in a short period of time and stably maintain the deposit layer on the reference surface after the refractory brick inside the furnace has disappeared relatively early from about 2 to 3 years after ignition of the blast furnace. As a result, the change in the profile of the furnace is small, the furnace can be stably operated, and the service life of the blast furnace can be extended.

(10) The blast furnace according to (9), further comprising: a plurality of stave body temperature sensors disposed within the stave body of either the stave body used for the view portion or the burner portion, And a protruding portion temperature detecting portion disposed in the protruding portion, wherein the thickness of the attachment from the reference surface of the stave body on the basis of the temperature detected by the stave body temperature detecting portion and the protruding portion temperature detecting portion, It is preferable to further have an attachment estimating section for estimating the remaining thickness of the stave body.

In such a blast furnace, the temperature of the furnace portion or the view portion is detected from the lower portion of the shaft portion of the furnace in the stave body temperature detecting portion and the protruding portion temperature detecting portion. And estimates the thickness of the deposit layer and the remaining thickness of the stave body on the reference surface of the stave body in the deposit estimating section based on the detected temperature. Thus, the integrity of the profile in the furnace can be determined. By controlling the cooling state of the stave or other parameters based on the determination result, it is possible to prevent deterioration of the profile of the furnace due to excessive adherend growth and to stabilize blast furnace operation by maintaining the proper profile .

(11) In the blast furnace operation method described in (10), a temperature detecting step of detecting the temperature of the stave body and the temperature of the protrusion by the stave body temperature detector and the protector temperature detector, An attachment determining step of determining whether or not the thickness of the attachment estimated by the estimation section and the thickness remaining in the stave body is thinner than a predetermined value; And a temperature control step of controlling the combustion temperature or the temperature of the stave body and the protrusions.

In this blast furnace operation method, first, the temperature of the stave body and the temperature of the protruding portion are detected in the temperature detecting step. Next, in the attachment determining process, it is determined whether or not the thickness of the attachment estimated by the attachment estimator and the remaining thickness of the stave body are thinner than the predetermined value. If the deposit is equal to the predetermined value, the temperature of the stave body and the temperature of the protrusion are detected subsequently.

On the other hand, when the deposit is thinner than a predetermined value, adjustment of the operating conditions and adjustment of the charge distribution is made in order to strengthen the cooling of the stove or lower the temperature in the blast furnace in the temperature control process. When the deposit is thicker than the predetermined value, the cooling of the stave is relieved so as to reduce the adherence in the temperature control process, or the adjustment of the operating conditions and the distribution of the charge for the purpose of raising the temperature in the blast furnace are performed.

In other words, it is possible to adjust the operation so that the cover necessary for protection of the stave 10 provided at the viewing portion and the burning portion is formed on the stave.

1 is a schematic diagram showing a blast furnace of a first embodiment of the present invention.
2 is a cross-sectional view showing a stave installed in the viewing portion and the ventilating portion of the blast furnace.
Fig. 3 is a front view showing a stove in the elevation. Fig.
Fig. 4A is a perspective sectional view showing a stave of the elevation. Fig.
Fig. 4B is a perspective sectional view showing a modified example of the stave of the same height. Fig.
Fig. 5 is a rear view showing the stove in the elevation hall. Fig.
Fig. 6 is a schematic diagram showing a temperature measurement system in the blast furnace.
7 is a graph showing the temperature measurement in the high-temperature furnace.
Fig. 8 is a schematic diagram showing a state in which the deposit in the blast furnace is insufficient.
Fig. 9 is a schematic diagram showing an appropriate state of the deposit in the blast furnace. Fig.
10 is a schematic diagram showing a state in which the deposit in the blast furnace is excessive.
11 is a flow chart showing a process of the operating method of the elevated boiler.
12 is a cross-sectional view showing a stiffener of the second embodiment of the present invention and stables installed in the furnace portion.
Fig. 13 is a front view showing a stave of the watch and the ventilator.
Fig. 14 is a rear view showing a stave of the panorama and the stairway. Fig.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]

In Fig. 1, the blast furnace 1 has a tubular furnace body 2 built on a foundation foundation.

The furnace body 2 is cylindrical in shape and includes a furnace port portion S1, a shaft portion S2, a furnace portion S3, a see-through portion S4, A portion S5, and a bottom portion S6. Generally, the inner diameter of the shaft portion S2 extends downward, the inner diameter of the furnace portion S3 is the maximum diameter, and the inner diameter of the see-through portion S4 is reduced downward.

In the furnace body 2, a charging device is usually provided in the gas collecting mantle 3, and the granular charge 4 is charged into the blast furnace 1 from the charging device. As the charge 4, an ore-based charge having a particle size of about 8 to 25 mm and a coke-based charge having a particle size of about 20 to 55 mm are charged alternately. As a result, in the furnace S1 and the shaft S2 in the furnace, the lumpy opponent 4A in which iron ore and coke are alternately stacked is formed.

In the furnace body 2, a blowing port 5 is provided at an upper portion of the furnace portion S6, from which the hot wind 5A is blown. The hot air 5A burns the coke in the agglomerated opponent 4A to be heated to a higher temperature and blows a high speed gas from the raceway 5B A space having a high porosity by fluidizing the coke in front of the blowing opening 5] is formed. The iron ores in the massive opponent 4A are melted by the high heat of the raceway 5B.

These coke burning and melting of the iron ores proceed sequentially from the lower part of the massive opponent 4A and a substantially conical fusing belt 4B is provided in the furnace from the viewing portion S4 toward the lower portion of the shaft portion S2 .

The iron powder 6A melted in the fusing belt 4B passes through the dropper 4C and drops toward the furnace S6 and is stored in the furnace S6 as molten iron 6B. The coke or the like which could not be entirely burnt in the fusing belt 4B is dropped through the dropper 4C and piled up in the furnace S6 to form a conical core 4D on the molten iron 6B .

An outlet 6 is provided in the furnace body S6 and a molten iron 6B stored in the furnace S6 by the outlet 6 is taken out of the furnace 1 .

The furnace body 2 has an iron core 2A on the outermost periphery and a stub for cooling or refractory bricks 2D is attached to the inside of the iron core 2A.

A shaft stub 2B is attached to an area S7 facing from the upper portion of the shaft portion S2 to the central lumpy opponent 4A. In this region S7, the granular charge 4 contained in the lumpy opponent 4A sequentially descends while coming into contact with the surface of the stave 2B, so that the surface of the stave 2B is mechanically abraded In some cases.

A staple 2C for the visually-impaired and the obese part is disposed on the inner periphery of a region S8 including the abdomen portion S3 and the see-through portion S4 from the lower portion of the shaft portion S2. In this region S8, a fused zone 4B made up of a high-temperature charge 4 (an area in which the softening and melting of the ores in the charge are started and the ores in the semi-molten state are fused to each other and connected in a plate shape, There is a case in which damage to the surface of the stave 2C inside the blast furnace 1 due to the high temperature and mechanical abrasion are caused have.

On the inner surface of the blast furnace 1 of these stables 2B and 2C, refractory bricks 2D are attached, if necessary. Further, the refractory bricks 2E are thickly stacked on the furnace bottom S6 where hot melt wires are stored.

The region S8 extending from the lower portion of the shaft portion S2 of the blast furnace 1 to the furnace portion S3 and the viewing portion S4 comes into contact with the base portion 30 of the fusing belt 4B, The portion of the refractory brick 2D provided on the inner surface of the blast furnace 1 of the stave 2C is lost in the early period of relatively early life of about 2 to 3 years from the ignition .

In the present embodiment, the stave 10 based on the present embodiment shown in Fig. 2 is employed as the stave 2C provided in the visibility portion S4 and the furnace portion S3 shown in Fig. 1 .

The stiffener 10 (hereinafter, simply referred to as the stiffener 10) provided in the hearth S4 and the furnace portion S3 of the present embodiment is a structure in which the shaft portion S2 of the blast furnace 1 shown in Fig. 1 Of the area S8 from the lower part of the furnace part to the furnace part S3 and the viewing part S4, particularly to the viewing part S4 and the furnace part S3. 2, the upper end of the viewing section S4 is inclined to the outside of the blast furnace 1 from the center of the blast furnace 1, and the lower end of the viewing section S4 is inclined And is inclined to the inside of the blast furnace 1 from the center of the blast furnace 1.

In the embodiment of Figs. 2, 3, 4A, 4B and 5, the stave 10 is made of copper or copper alloy having a reference plane R facing the inner space of the blast furnace 1, And a plurality of projections 12 protruding from the reference plane R toward the inside of the blast furnace 1. The stove 10 may be a casting which is batch-cast from copper or a copper alloy.

The stave body 11 is a thin plate shape cut out from a plate made of copper or a copper alloy.

As shown in Fig. 4A, a plurality of the protruding portions 12 are provided horizontally on the front surface side of the stave body 11. 4A is a view in which the groove 21 is omitted. As shown in Fig. 2, a plane 13 with a lower step is formed between the plurality of projections 12. As shown in Figs. 2 and 3, three grooves 21 are formed in the flat surface 13, and refractory bricks 15 are sandwiched between these grooves 21. As shown in Fig. The refractory 13A is also provided in the concave portion 22 formed by the flat surface 13 and the projections 12.

A refractory castable may be used instead of the refractory brick 15. The number and location of the grooves 21 are not limited to this.

The flat surface 13 is formed by cutting from the surface of the stave body 11, and the protruding portion 12 is formed by being shaved at this cutting. Here, the plane 13 is the reference plane R of the stave 10, and the protrusion 12 protrudes from the reference plane R of the stave 10.

4A, when the stave 10 is attached to the blast furnace 1, the protrusions 12 are continuously provided along the circumferential direction in the blast furnace 1, The protrusions 12 of the stave 10 form a complete annular ring shape.

The protrusions 12 may be intermittently (intermittently) arranged along the circumferential direction in the blast furnace 1 as shown in Fig. 4B. In this case, various geometric patterns such as a lattice shape and a zigzag shape can be employed, but it is preferable that they are symmetrically arranged in consideration of circumferential balance. 4B is a view showing the groove 21 omitted.

2, a bolt accommodating portion 11A for mounting to the blast furnace 1 is formed on the back side of the stave body 11. As shown in Fig.

2, the stove 10 is provided inside the stave body 11 and is provided with a stave body cooling pipe (stave body cooling) which flows the fluid for cooling the stave body 11 And a protruding portion cooling channel (protruding portion cooling channel) 17 provided inside the protruding portion 12 for flowing a fluid for cooling the protruding portion 12. [

A connection port (connection port) 16A connected to the stave body cooling pipe 16 is provided on the backside of the stave body 11. A connection port 17A connected to the protrusion cooling pipe 17 is provided .

The stave body cooling duct 16 is disposed along the plane 13 in the circumferential direction and the height direction of the blast furnace 1 and is formed by the cooling water supplied from the connection port 16A, It is possible to cool the plane 13 which becomes the reference plane R of the stave 10 for use.

3, the protruding portion cooling pipe 17 is inserted through the inside of the protruding portion 12 along the circumferential direction in the blast furnace 1, and the cooling water supplied from the connecting port 17A is supplied to the protruding portion 12 can be cooled.

It is preferable that the tip end face 12a of the protruding portion 12 is coated with a high hardness material such as TiN, TiC, WC, or Ti-Al-N.

The adjacent distance D between the respective protruding portions 12 is in the range of 500 to 1000 mm.

If the distance D between the adjacent protruding portions 12 is wider than 1000 mm, the adherend 19 formed and attached with the protruding portion as a starting point can not be created and attached to the vicinity of the lower end of the protruding portion on the high position side. This makes it impossible to uniformly form an attachment layer (attachment) having a predetermined thickness over all reference planes R between the adjacent protrusions so that the stave body can be uniformly heated by the heat load by the root portion 30 of the fusing stand 4B, The self-lining effect for protecting against the hair is not sufficiently obtained.

When the distance D between the adjacent protruding portions 12 is narrower than 500 mm, the charge 4 containing the ore having a falling semi-molten state between the adjacent protruding portions is decelerated and is generated on the reference surface R by cooling The thickness of the deposited layer becomes excessively thick. If the deposit layer is excessively thick, it may cause a stable drop of the charge 4, and if the deposit layer is peeled off due to a change in the operating conditions of the blast furnace, ), Which is a cause of greatly changing the inner surface profile of the furnace, is not desirable in order to maintain stable operation of the furnace.

The protruding portion 12 is provided in the viewing portion S4 so that the relationship between the protruding amount E1 from the reference surface R and the interval D1 between adjacent adjacent protruding portions 12 satisfies the following expression (A) The projecting portion 12 is provided in the projecting portion 12 so that the relationship between the projecting amount E2 from the reference plane R and the distance D2 between the adjacent projecting portions 12 satisfies the following expression (B).

Here, theta (? 1,? 2) is an inclination angle of an attachment adhered to the reference surface (R). The general charge 4 comprises an ore-based charge with a particle size of 8 to 25 mm and a coke-based charge with a particle size of 20 to 55 mm alternately charged in layers in a blast furnace, Of the attachment 19 attached to the reference surface R of the stiffener 10 in the sight portion S4 provided near the base portion 30 of the fusing belt 4B of the charge 4 containing the charge The angle [theta] 1 becomes approximately 75 [deg.]. The above-mentioned? 1 is an inclination angle of the visibility section S4 of the blast furnace, and is designed in the range of 77 to 82 degrees in the normal blast furnace 1.

The protrusions 12 are provided in such a manner that the protrusions E1 and E2 and the intervals D1 and D2 satisfy the relations defined by the above formulas (A) and (B) The charge 4 containing the ore is decelerated, cooled and attached to the reference plane R. [ In this manner, the entire surface of the reference surface R can be efficiently covered with the naturally growing deposit layer, and the stave body can be sufficiently protected against thermal load and hand damage.

The protruding amounts E1 and E2 of the protrusions 12 and the intervals D1 and D2 are set so as to satisfy the relations defined by the above-mentioned formulas (A) and (B), so that the adherend layer in the reference plane R becomes excessively thick Can be prevented. It is also possible to prevent a large change in the profile of the inner surface of the blast furnace 1 of the hearth S4 and the furnace portion S3 when the deposit layer is peeled off due to a change in operating conditions of the blast furnace 1, It is possible to avoid operational troubles such as deterioration of the charge 4 at the time of operation and to continue the stable operation of the blast furnace over a long period of time.

The protrusion amounts E1 and E2 of the protruding portion 12 are as follows. That is, the distances D1 and D2 between the adjacent protruding portions 12 of the stave for the eyebrow portion and the stern for the obturator portion within the range of 500 to 1000 mm, which is the interval between the above-described preferable protruding portions 12, are set. Then, the protrusion amounts E1 and E2 of the protrusion 12 are calculated by the set D1 and D2, and the above-mentioned equations (A) and (B).

Since the protruding portion 12 protrudes from the reference surface R to the inside of the blast furnace 1, the protruding portion 12 is liable to be damaged due to high temperature damage from the high temperature charge 4 or mechanical wear. The durability of the stave body due to the self lining is improved from the balance between the worn-out speed of the protruding portion 12 by the high-temperature charging object 4 and the growth speed of the adherend at the reference surface R by the protruding portion 12 The protrusion 10 from the reference surface R of the protruding portion 12 in any one of the stave 10 provided in the viewing portion S4 and the stave 10 provided in the ventilating portion S3 It is preferable that E1 and E2 are 50 to 150 mm.

A refractory brick 13A is provided in the concave portion 22 between the protruding portions 12. This refractory brick 13A is provided with a reference plane R of the stave 10 installed at the view portion S4 and the furnace portion S3 is opened during operation of the high fuel cost (high temperature load) at the time of ignition of the blast furnace 1 Used to protect against shock. The refractory brick 13A may be destroyed by heat shock or mechanical damage during an initial period of about two to three years after ignition.

In the conventional blast furnace portion and furnace portion, damage to the refractory brick and stave due to high temperature of the root portion 30 of the fusing belt 4B in the furnace 1 life span from ignition to fire extinguishment of the blast furnace, When the profile of the furnace changes rapidly due to the progress, stable furnace operation of the blast furnace becomes difficult.

On the other hand, in the present embodiment, the stove main body 11 of copper or copper alloy having a high thermal conductivity and high heat generating ability and the protruding portion 12 projecting inward from the reference surface R to the inside of the blast furnace 1 are provided One stave 10 is provided on the inner periphery of the viewing portion S4 and the furnace portion S3. By providing the stave 10 at a position exposed to a high temperature by the root portion 30 of the welded portion of the visibility portion S4 and the furnace portion S3 in particular, Even if the refractory brick 13A is lost at the time of the erosion of the refractory brick 13A, a deposit layer made of the charge 4 can be generated in the reference plane R in a short period of time, and the change of the profile in the furnace can be reduced. As described above, the self-lining effect by generating an appropriate deposit on the inner surface side of the blast furnace 1 of the stove 10 in a short period of time makes it possible to maintain the stable operation for a long period of time, It is possible to extend the service life of the part and the abdomen.

6, a plurality of stave body temperature sensors (stave body temperature detecting portions) 91a, 91b, and 91c disposed along the reference surface R are provided in the stave body 11, (Protruding portion temperature detecting portion) 92 disposed inside the protruding portion 12 of the protruding portion.

The blast furnace 1 also has a thickness of the deposit from the reference plane R of the stave body 11 based on the temperatures detected by the stave body temperature sensors 91a to 91c and the protrusion temperature sensor 92, (95) for estimating the remaining thickness of the stave body (11).

The stave body temperature sensors 91a to 91c are arranged on the plane 13 which is the reference plane R of the sight portion S4 and the stave 10 of the furnace portion S3 so that the height direction of the blast furnace 1 is TW2, and TW3 from the stab body temperature sensors 91a to 91c are output to the outside, and the temperature TW of the plane 13 (for example, the average value of each output and the variation value Is obtained.

The protruding portion temperature sensor 92 is embedded in the protruding portion 12, and the output TL is output to the outside. Each of the outputs TW (TW1, TW2, TW3) and TL is connected to the control device 94 of the blast furnace 1 through an interface 93 provided around the outside of the blast furnace 1. The control device 94 incorporates an attachment judging section 95. The control device 94 judges whether or not the stove body temperature sensors 91a to 91c and the protruding portion temperature sensor 92 S3 on the reference surface R of the stave body 11 is determined.

The stave body temperature sensors 91a to 91c and the protruding portion temperature sensor 92 may be provided on either the stave 10 of the watch unit S4 or the stepped portion S3.

The stave body temperature sensors 91a to 91c (TW, = TW1, TW2 and TW3) are provided on the plane 13 which is the reference plane R of the sight portion S4 and the stave 10 of the furnace portion S3, The temperature in the blast furnace 1 is detected at a high temperature and sensitively in a state in which the adhering substance 19 is insufficient as shown in Fig. 8, but as shown in Figs. 9 and 10, When the adherend 19 is grown on the adherend 13, the detection temperature gradually shifts to the low temperature side covered with the adherend 19, and the variation is also insensitive.

The temperature sensor 92 (TL) is embedded in the front end surface of the protruding portion 12, and as shown in Fig. 8, the attachment 19 is deficient or, as shown in Fig. 9, The temperature of the blast furnace 1 is high and the temperature is sensed sensitively in the state where the protruding portion 12 is not covered with the protruding portion 12. However, as shown in Fig. 10, The detected temperature gradually shifts to the low temperature side, and the fluctuation is also detected insensitively.

Next, a method of operating the blast furnace 1 will be described using the flowchart of Fig.

First, the temperature of the stave body 11 and the temperature of the protruding portion 12 are detected by the stave body temperature sensors 91a to 91c and the protruding portion temperature sensor 92 (S11: temperature detection step).

Next, it is determined whether or not the thickness of the deposit 19 estimated by the deposit estimator 95 and the thickness remaining in the stave body 11 are smaller than a predetermined value (S12: attachment determination process). That is, the attachment judging section 95 monitors the outputs from these temperature sensors 91a to 91c and 92 and detects the temperatures TW (TW1, TW2 and TW3) from the respective temperature sensors 91a to 91c and 92, The generation state of the deposit 19 is determined based on the TL. The predetermined value is the thickness from the plane 13 shown in Fig. 9 to the position shown by the chain double-dashed line, which is the depth of the concave portion 22 of the stave 10 in this embodiment.

Here, a concrete determination method in the attachment determination section 95 will be described with reference to FIG.

In the time zone A1, the detection temperatures TW (TW1, TW2, TW3) and TL are both high. Thus, the attachment judgment section 95 judges that the attachment 19 is in a state of being insufficient (thin) (a state of Fig. 8) than a predetermined value (S12-1).

In the time zone A2, the detected temperature TL is a high temperature and sensitive motion (fluctuation width WL, WW1, WW2, WW3), but the detected temperature TW (TW1, TW2, TW3) gradually shifts to the low temperature side sequentially. In this case, it is determined that the attachment 19 is in an appropriate state (the state shown in Fig. 9) in which the attachment 19 has grown smoothly (S12-2). Thereafter, the temperature of the stave body 11 and the temperature of the protruding portion 12 are measured again (S11).

9, the appropriate state of the deposit 19 is a state shown by a two-dot chain line from the state shown by the solid line (the state of transition from the middle period of the period A2 to the optimum state) Appropriate state). The optimum state is a state in which the temperature TW3 detected by the stab body temperature sensor 91c is lower than the temperature detected by the protuberance temperature sensor 92 It is the period up to time t2 when TL begins to descend.

In the time zone A3, the detected temperature TL is also gradually lowered to the low temperature side, resulting in a lower temperature and insensitive movement (fluctuation width WL '). Therefore, in this case, the detection temperatures TW (TW1, TW2, TW3) and TL are both low temperature and extremely insensitive (fluctuation width WL ', WW1', WW2 ', WW3'). Thus, the attachment judgment section 95 judges that the attachment 19 is in a state of being excessively thick (thick state) (a state of Fig. 10) (S12-3).

The combustion temperature in the blast furnace 1 or the temperature of the stave body 11 and the protruding portion 12 is controlled so that the deposit 19 is grown when the deposit 19 is insufficient (S12-1). Concretely, adjustment of the operating conditions and adjustment of the charge distribution is performed (S13: temperature control step) in order to enhance the cooling of the stove 10 by increasing the flow rate of the cooling water or lower the temperature in the furnace.

On the other hand, when it is determined that the deposit 19 is excessive (S12-3), the combustion temperature in the blast furnace 1, or the temperature of the stave body 11 and the protruding portion 12, . Concretely, adjustment of the operating conditions and adjustment of the charge distribution are performed in order to relax the cooling of the stave 10 provided in the viewing portion S4 and the furnace portion S3, or to raise the temperature in the blast furnace 1 (S13: temperature control step).

After the temperature control, the temperature of the stave body 11 and the temperature of the protruding portion 12 are measured again (S11).

In Fig. 9, the development charge 4 includes an ore-based charge of 8 to 25 mm in size and a coke-in charge of 20 to 55 mm in size, alternately layered in the blast furnace have. In the case of the stave 10 provided in the sight portion S4 provided near the base portion 30 of the fusing belt 4B made of the charging object 4 including the semi-molten ore, In the smoothly grown state, it is confirmed that the inclination angle? 1 of the adherend 19 attached to the reference surface R is about 75 degrees. However, in the actual blast furnace investigation results up to now, it has been found that a large amount of powder due to reduction differentiation (reduction powdering) of the charged state, etc., and a change in pressure on the loading side due to the furnace profile, It is difficult to confirm the inclination angle 2 of the attachment 19 in the case of the stave 10, but it is assumed that the inclination angle 2 is in the range of about 85 to 88 degrees.

The attachment determination section 95 can determine the state of the attachment 19 and perform the process according to the determination result to form the layer of the desired attachment 19 on the stave 10. That is to say, the operator of the blast furnace 1 can perform the operation adjustment so that the coating necessary for protecting the stiffener 10 installed in the viewing section S4 and the furnace section S3 is formed on the stiffener 10.

According to the present embodiment described above, the following effects can be obtained.

The visibility portion S4 disposed on the inner surface of the blast furnace 1 and exposed to the base portion 30 of the fusing bar 4B and the stave 10 provided on the furnace portion S3 are disposed on the outer periphery of the blast furnace 1, A stove body 11 made of copper or copper alloy having a plane 13 of the furnace inner side as a reference plane R and a protrusion 12 protruding inward from the reference plane. Thereby, the root portion 30 of the fusing belt 4B of the charge 4 containing the semi-molten ore falling in the blast furnace 1 is decelerated and cooled, 19) grows. Therefore, the reference surface R can be covered with the adhering substance 19. [

As a result, the reference surface R is not directly exposed to the base portion 30 of the hot welding base 4B by the attachment 19 acting as a protective layer, so that the transparent portion S4 and the furnace portion S3, It is possible to increase the heat resistance of the stave 10 installed in the vehicle.

Particularly, in this embodiment, since the stave body 11 made of copper or a copper alloy having a high thermal conductivity and a high heat generating ability is used, the coating of the reference surface R is peeled off due to a change in operating conditions of the blast furnace 1 , The charging object 4 containing the ore in the semi-molten state which is then dropped is decelerated. In this manner, the coating layer of the adherend 19 can be regenerated in a short period of time by being rapidly cooled and attached to the reference surface R. The durability of the stove 2C (10) provided in the viewing portion S4 and the furnace portion S3 is obtained by the self-lining effect using the deposit 19.

In the stove 10 provided in the viewing section S4 and the furnace section S3, the projecting section 12 is provided with a projecting cooling channel 16 in addition to the stave body cooling duct 16 formed in the stave body 11. [ (17). Since the stove body 11 is made of copper or a copper alloy having a high thermal conductivity and a high heat generating ability because the stitch body 10 of the present embodiment has stove body 10, The projecting portion is sufficiently cooled only by the stave body cooling duct 16 inside the main body 11. [ However, the protruded portion 12 is also provided with the protruded cooling channel 17, and the protruded portion 12 is directly cooled to lower the temperature of the reference surface R of the stave body 11 to promote the creation of the adhering substance 19 .

Temperature sensors 91a to 91c and 92 are provided on the plane 13 as the reference plane R and a part of the protrusion 12 in the stave 10 provided in the viewing section S4 and the furnace section S3, And the thickness of the deposit 19 and the remaining thickness of the stave body 11 are estimated by the attachment judging section 95. Therefore, the soundness of the profile in the furnace can be judged outside the blast furnace 1.

The cooling state or other parameters of the stove 10 provided in the viewing section S4 and the burning section S3 are adjusted based on the determination result of the attachment determination section 95. [ Thus, proper growth of the adherend 19 can be achieved. By appropriately adjusting the thickness of the deposit layer on the reference surface R of the stave body 11 as described above, it is possible to protect the stave body against thermal load and hand damage, It is possible to prevent deterioration of the profile of the furnace and stabilize the blast furnace operation by maintaining a proper profile.

In the stiffener 10 provided in the viewing portion S4 and the furnace portion S3, the interval between the adjacent projecting portions 12 is set to a range of 500 to 1000 mm.

When the distance between the adjacent protruding portions 12 is wider than 1000 mm, the adherend 19 generated and attached with the protruding portion 12 as a starting point can be generated and attached to the vicinity of the lower end portion of the protruding portion 12 on the high- none. This makes it possible to uniformly form an adhesion layer having a predetermined thickness over all the reference planes R between the adjacent protrusions 12 and to prevent the heat load and the hand damage caused by the root portion 30 of the fusion- 11 can not be sufficiently obtained. However, this can be avoided in the sight portion S4 of the present embodiment and the stave 10 provided in the burn-in portion S3 in which the interval between the adjacent projecting portions 12 is in the range of 500 to 1000 mm.

When the distance between the adjacent protrusions 12 is narrower than 500 mm, the charge 4 containing the ores in the semi-molten state falling between the adjacent protrusions 12 is decelerated, The thickness of the resulting deposit layer becomes excessively thick. If the deposit layer is excessively thick, it may cause a problem of a stable drop of the charge 4 or may cause the visibility portion S4 and the furnace portion S3 to be damaged when the deposit layer is peeled off due to a change in operating conditions of the blast furnace 1, Which is a cause of largely changing the inner surface profile of the furnace or maintaining the stable operation of the furnace. However, this can be avoided in the sight portion S4 of the present embodiment and the stave 10 provided in the burn-in portion S3 in which the interval between the adjacent projecting portions 12 is in the range of 500 to 1000 mm.

The protrusion 12 of the stave 10 of the see-through portion S4 of the stave 10 provided in the viewing portion S4 and the ventilating portion S3 is adjacent to the projection amount E1 from the reference surface R And the protrusion 12 of the stave 10 of the furnace portion S3 has a protrusion amount E2 from the reference surface R as shown in Fig. And the distance D2 between adjacent protruding portions 12 satisfies the following expression (B).

Here,? (? 1,? 2) is an inclination angle of an attachment adhered to the reference surface R. The present invention charge 4 comprises an ore-based charge having a particle size of 8 to 25 mm and a coke-loaded charge having a particle size of 20 to 55 mm alternately charged in layers in the blast furnace 1, The inclination angle [theta] of the stiffener 10 of the sight portion S4 provided near the base portion 30 of the fusing belt 4B of the charge 4 containing the ore in the state of being approximately constant at 75 [ . In this case,? 1 is the inclination angle of the blind portion S4 of the blast furnace, and? 1 in the normal blast furnace 1 is designed in the range of 77 to 82 degrees. The inclination angle? 2 of the stave 10 of the furnace portion S3 is empirically estimated to be about 85 to 88 degrees and the inclination angle? 2 of the furnace portion S3 is 90 degrees.

The projecting amounts E1 and E2 of the protrusions 12 and the intervals D1 and D2 are set so as to satisfy the relations defined in the above formulas (A) and (B) The charging object 4 containing it is decelerated. This can effectively cover the entire surface of the reference surface R with the adhered layer naturally adhering to the reference surface R cooled by the charge 4 so that the stave body 11 Can sufficiently be protected.

The protruding amounts E1 and E2 and the intervals D1 and D2 of the protrusions 12 are set so as to satisfy the relations defined in the above formulas (A) and (B), respectively, so that the adherend layer in the reference plane R becomes excessively thick It is possible to prevent the profile of the inner surface of the blast furnace 1 of the hearth section S4 and the furnace section S3 from deteriorating when the deposit layer is peeled off due to changes in the operating conditions of the blast furnace, It is possible to avoid operational troubles such as deterioration of the boom (4), and stable operation of the blast furnace can be continued over a long period of time.

The protruding amounts E1 and E2 of the protruding portions 12 are set in the stave 10 and the furnace portion S3 provided in the viewing portion S4 within the range of 500 to 1000 mm, D2 and the above formulas (A) and (B) when the intervals D1, D2 between the respective adjacent protrusions of the stave 10 are set.

Since the protruding portion 12 protrudes inward from the reference surface R, the protruding portion 12 tends to be worn out due to heat or wear from the high-temperature charge 4. This makes it possible to prevent the stiffness of the stave portion 12 provided at the viewing portion S4 from the balance between the maternal speed of the protruding portion 12 by the high temperature charge 4 and the growth rate of the adherend at the reference surface R by the protruding portion 12. [ The protruding amounts E1 and E2 from the reference surface R of the protruding portion 11 are preferably 50 to 150 mm in any of the stiffener 10 and the stave 10 provided in the furnace portion S3. By adjusting the projecting amounts E1 and E2 in this way, the effect of improving the durability by self-lining of the stave body 11 can be sufficiently exhibited.

Since the surface of the protruding portion 12 is coated with a high hardness material, wear of the protruding portion 12 itself can be prevented. As a result, it is possible to stably maintain the durability performance of the stiffener 10 provided in the viewing portion S4 and the furnace portion S3 for a long period of time.

Since the protruding portion 12 is formed integrally with the stave body 11, it is easy to manufacture and the processing for passing the protruding portion cooling pipe 17 through the protruding portion 12 can be simplified.

Since the refractory bricks 13A are provided in the concave portions 22 between the projections 12, it is possible to easily withstand the heat shock (high fuel cost operation) during the ignition of the blast furnace 1 in which the deposit 19 is not grown have. In a comparatively early period of about 2 to 3 years from the ignition in the furnace 1 life of about 15 years from the ignition of the blast furnace to the fire extinguishment, the refractory brick 13A is damaged by heat shock, A layer of the deposit 19 to which the charge 4 is attached on the reference plane R of the stave body 11 is formed at a short period of time and the fusion layer 4B is formed by this deposit layer, It is possible to protect the stave body 11 from heat load and hair loss by the root portion 30 of the base portion 30 (self-lining effect), thereby stabilizing operation and long-term service life.

In this embodiment, by using the stiffener 10 provided on the viewing portion S4 and the furnace portion S3 as the stiffener 2C, Thermal shock resistance and abrasion resistance due to the lining effect can be enhanced.

Particularly, the stalk 10 of the hearth section S4 and the furnace section S3 based on the present embodiment can be stably moved from the lower portion of the shaft section S2 of the blast furnace 1 to the furnace section S3 and the hearth section S4 As the stave 2C of the area S8. Thereby, when the base portion 30 of the fusing belt 4B made of the high-temperature charging object 4 included in the fusing belt 4B sequentially descends while coming into contact with the surface of the stub 2C, The attachment 19 is decelerated by the protrusion 12 of the stave 10 of the step portion S4 and the stepped portion 10 of the step portion S3. As described above, the deposit 19 is rapidly cooled, so that the coating of the deposit layer on the reference surface R is formed at a short period of time.

Therefore, even if the refractory bricks disposed inside the blast furnace 1 are lost due to thermal shock or mechanical damage during the early stage of the comparatively long working life of about 2 to 3 years after ignition of the blast furnace 1, R, the transfer of the high temperature from the fusing stand 4B can be suppressed, and the damage and damage to the reference surface R can be suppressed.

That is, in the region S8 where the base portion 30 of the fusing belt 4B made of the high-temperature charging object 4 is in contact, The damage to the refractory brick due to the high temperature and the damage are progressed, so that the profile of the furnace is abruptly changed, which makes it difficult to stabilize the furnace 1. On the other hand, in the blast furnace 1 based on the present embodiment, the visibility portion S4 in the blast furnace 1 and the exposed portion of the furnace portion S, particularly the base portion 30 of the fusing belt 4B, A stave 10 having a stove body 11 of copper or a copper alloy having a high thermal conductivity and a high heat generating ability and a protruding portion 12 projecting inward from the reference surface R is provided on the surface of the stator 10. Thereby, even if the refractory bricks on the inner side of the blast furnace 1 are lost in the early stage of the comparatively long life span of about 2 to 3 years from the ignition of the blast furnace 1, Layer can be created at an early stage. In this manner, the change of the profile in the furnace can be reduced by keeping the deposit layer stably, and the operation of the blast furnace 1 can be performed stably over a long period of time, so that the service life of the blast furnace 1 can be greatly extended.

Since the blast furnace 1 has the convex portion 12 of the stave 10 provided in the furnace portion S3 and the convex portion 12 disposed in the furnace portion S3 arranged continuously in the entire circumference of the blast furnace 1, It is possible to maintain the circumferential balance in the furnace 1 appropriately and to keep the operation of the blast furnace 1 well.

Since the blast furnace 1 has the attachment judging section 95 in the control device 94, the temperature sensors 91a to 91c and 92 (see FIG. 1) of the stove 10 provided in the viewing section S4 and the furnace section S3 The state of the deposit 19 can be judged based on the detected temperatures TW (TW1, TW2, TW3) and TL from the sensors (TW). It is possible to obtain an appropriate coating on the reference plane R of the stave body 11 by adjusting the operation state of the blast furnace 1 from the control device 94 with reference to the determination result.

[Second embodiment]

12, 13 and 14 show a second embodiment of the present invention.

The stitching portion 20 and the stitching portion 20 for the obturator of the present embodiment are formed so as to extend from the lower portion of the shaft portion S2 of the blast furnace 1 of the first embodiment to the furnace portion S3 and the viewing portion S4 And is used as the stave 2C of the area S8. The construction of the blast furnace 1 is the same as that of the first embodiment described above and the basic structure of the stove 20 provided in the hearth S4 and the furnace portion S3 of the present embodiment is the same as that of the first embodiment Is the same as that of the stave 10 of the visibility section S4 and the furnace section S3. Therefore, the description of the common parts with the stave 10 of the first embodiment described above will be omitted, and the different parts will be described below.

12, 13, and 14, the stitches 20 provided in the viewing portion S4 and the furnace portion S3 are the same as those of the furnace portion S4 and the furnace portion S3 of the above- The bolt receiving portion 11A, the protruding portion 12, the plane surface 13, the refractory brick 15, the stave body cooling pipe 16, and the connection port 16A, which are the same as the stave 10, . In the stove 10 of the first embodiment, however, the projecting portion cooling duct 17 and its connection port 17A formed inside the protruding portion 12 are omitted.

In this embodiment, the same effects as those of the first embodiment described above can be obtained. However, since there is no protruding portion cooling pipe 17 formed inside the protruding portion 12, local cooling to the protruding portion 12 is not obtained.

In this respect, in the above-described first embodiment and the staple 10 for the obturator, the local cooling to the protruding portion 12 is obtained. This makes it possible to effectively control the temperature in the vicinity of the protruding portion 12, which is optimum for the acceleration and deceleration of the adherend 19. [ On the other hand, since the protruding portion 20 and the protruding portion 20 of the present embodiment have no projecting portion cooling duct 17, the structure is simple and the manufacturing cost can be reduced, It can be said that it is preferable to use the stave 20 of the second embodiment for a portion where the acceleration / deceleration of the stator 19 is not required so much.

[Modifications]

The present invention is not limited to the first and second embodiments described above, but includes modifications and the like within the scope of achieving the object of the present invention.

The stitches 10 and 20 provided in the viewing section S4 and the ventilating section S3 of the respective embodiments are provided in the viewing section S4 in the area S8 in which the stave 2C is attached. The stave body 11 has a slope whose upper end is outside the furnace and whose lower end is inside the furnace, in accordance with the shape of the viewing portion S4. The stave body 11 is applied to the furnace portion S3 in the region S8 in the stove installed in the furnace portion S3 so that the stave body 11 is not inclined in accordance with the furnace portion S3, The reference plane R is formed vertically.

In the above embodiment, when the viewing S4 and the stables 10, 20 of the furnace portion S3 are arranged in the blast furnace 1, The protrusions 12 of the first and second protrusions 10 and 20 are formed in an annular shape continuously in the circumferential direction in the blast furnace 1, but they may be discontinuous circular rings, staggered at different heights, Or may be listed. However, in the operation of the blast furnace 1, the circumferential balance is important, and consideration should be given so as to obtain symmetry with respect to the center of the blast furnace 1.

The surface of the protruding portion 12 of the stiffener 10 provided in the viewing portion S4 and the furnace portion S3 is coated with a high hardness material or the protruding portion 12 is made of the high hardness material However, the use of a high hardness material is not essential. However, since it protrudes from the reference surface R of the main body of the staves 10, 20 and is liable to be abraded by the charge 4, it is preferable to secure wear resistance by a high hardness material.

The refractory bricks are attached between the protrusions 12 so as to protect the reference surface R from heat shock at the time of ignition before the staves 10 and 20 are installed in the blast furnace 1 You can.

In addition, the arrangement and the cross-sectional shape of the projection 12, the arrangement of the stave body cooling pipe 16, the projection cooling pipe 17, the installation positions and number of the temperature sensors 91a to 91c and 92, S4 and the stables 10, 20 provided in the furnace portion S3 may be appropriately selected at the time of implementation.

Although the grooves 21 are formed in the reference surface R of the staves 10 and 20, the grooves 21 are not necessarily required. That is, by forming the plurality of grooves 21 in the reference surface R, it is possible to prevent the heat in the blast furnace 1 from escaping to the blast furnace 1, but if the heat escapes to the outside, , The groove 21 need not be formed.

1: blast furnace
2:
2A: Evil
2B, 2C: stave
2D, 2E: Refractory brick
3: Gas capture mantle
4: Charge
4A: Massive opponent
4B: Fuselage
4C: enemy base
4D: Core
5: Tuyere
5A: Hot wind
5B: Raceway
6: Outpost
6A: Iron
6B: Charter
10, 20: Stave
11: stove body of copper or copper alloy
11A: Bolt receiving portion
12: protrusion
13: Flat
15: Refractory bricks
16, 17: Stave body cooling duct
16A and 17A:
19: Attachment
91a to 91c, 92: temperature sensors
93: Interface
94: Control device
95: attachment judgment section
D1, D2: Interval
E1, E2: protrusion amount
R: Reference plane
S1: nogubu
S2: shaft portion
S3:
S4:
S5:
S6:
S7: Mounting area of shaft for shaft
S8: Mounting area of eyebrows and sterns
TL, TW, TW1, TW2, TW3: Detection temperature
?,? 1,? 2: the inclination angle of the inner surface of the blast furnace of the adherend attached to the reference surface (R)
α1, α2: Angle of the stave for the eyebrow and the dislocation

Claims (11)

A stove installed at the inner periphery of the bladed portion of the blast furnace and the furnace portion,
A stave body made of copper or a copper alloy having a reference surface facing the internal space of the blast furnace,
And a plurality of protrusions protruding from the reference surface toward the inside of the blast furnace,
Characterized in that a recess is formed between the plurality of projections of the stave body toward the outside of the blast furnace, and a refractory is provided in the recess. The stove body cooling system according to claim 1, further comprising: a stave body cooling flow passage provided inside the stave body for flowing a fluid for cooling the stave body;
And a protruding portion cooling flow passage provided inside the protruding portion for flowing a fluid for cooling the protruding portion. [2] The apparatus of claim 1, further comprising: a plurality of stave body temperature detecting units disposed along the reference surface in the stave body;
And a protruding portion temperature detecting portion disposed inside the protruding portion. The stave according to claim 1, characterized in that the distance between adjacent projections is in the range of 500 to 1000 mm. The projection optical system according to claim 4, wherein the protruding portion is provided in the viewing portion such that a relationship between a protrusion amount E1 from the reference surface and an interval D1 between adjacent adjacent protruding portions satisfies the following expression (A)
Wherein the protruding portion is provided in the furnace portion such that a relationship between a protrusion amount E2 from the reference surface and a distance D2 between adjacent protruding portions satisfies the following expression (B).

Here,? 1 is an oblique angle of 75 ° of the adherence adhered to the reference surface in the viewing portion,
? 2 is an inclination angle of 85 ° to 88 ° of an adherence adhered to the reference surface in the furnace portion,
? 1 is an inclination angle of the stove used at the viewing portion of 77 ° to 82 °,
alpha 2 is 90 DEG which is an inclination angle of the stave used in the burner portion. The stave according to claim 1, characterized in that the projections are provided continuously or intermittently along the circumferential direction in the blast furnace. delete The stave according to claim 1, wherein a refractory is provided on the recess formed by the reference surface and the protrusions. A blast furnace comprising the stave as set forth in any one of claims 1 to 6 and 8. 10. The stator of claim 9, further comprising: a plurality of stave body temperature detecting portions disposed inside the stave body of either of the staves used in the viewing portion and the burner portion along the reference surface; A protruding portion temperature detection portion disposed in the interior of the housing,
And an attachment estimating section for estimating the thickness of the attachment from the reference surface of the stave body and the thickness remaining in the stave body based on the temperature detected by the stave body temperature detection section and the protrusion part temperature detection section As feature, blast furnace. A method for operating a blast furnace according to claim 10, further comprising a temperature detecting step of detecting the temperature of the stave body and the temperature of the protruding part by the stave body temperature detecting part and the protruding part temperature detecting part,
A deposit determining step of determining whether the thickness of the deposit estimated by the deposit estimator and the thickness remaining in the stave body are thinner than a predetermined value;
And a temperature control step of controlling the combustion temperature in the blast furnace or the temperature of the stave body and the protruding part based on the determination by the attachment determining step.

Images