JP5523956B2 - Blast furnace body structure and blast furnace body formation method - Google Patents

Description

  The present invention relates to a blast furnace furnace structure and a method for forming a blast furnace furnace, and more particularly to a structure of a blast furnace furnace body having a furnace wall brick on the inner side of a furnace and a method for forming the same.

The furnace body of the blast furnace has a basic structure of an outer shell (mantel) in which the iron skin is formed in a cylindrical shape, and a refractory material layer is formed inside the furnace to protect the iron skin from high heat inside. Since a sufficient layer thickness can be secured as the refractory material layer, a configuration in which furnace wall bricks such as carbon bricks are stacked is often used.
Further, in the blast furnace, in addition to the protection of the iron skin by the furnace wall brick, a cooling device by circulating water cooling or the like is used. As a cooling device in recent years, a configuration in which a metal plate-like stave is installed immediately inside the furnace of the iron skin is often used.
At this time, in order to improve the cooling performance of the stave against the bricks of the furnace wall, an indefinite form of refractory material is filled between the inside wall of the stave and the bricks of the furnace wall to ensure heat transfer performance from the bricks to the stave It has been done.

In constructing such a blast furnace, first, an iron skin is installed, a stave is attached to the inner surface of the furnace, and a furnace wall brick is installed from the lowermost stage inside the furnace, and is sequentially stacked on the upper stage.
At this time, an interval of, for example, about 100 mm is provided between the furnace inner surface of the stave and the furnace wall brick, and this is filled with an irregular refractory material.
Specifically, each time a furnace wall brick is stacked, a fire-resistant stamp material (or ramming material, powder that solidifies by tamping, etc.) is injected into the gap, and stamped with a rammer or the like. The stamp material is densely filled in the gap.
At this time, it is filled between the furnace wall brick and the wall body, that is, iron skin or stave, etc. by directly or indirectly hitting or vibrating by sand rammer, vibro rammer, electromagnetic vibration, and expelling the air in the stamp material. The structure of the stamp material is made uniform and dense (see Patent Document 1).

In a blast furnace having such a stamp material, heat from the furnace wall brick is transmitted to the stave through the densely packed stamp material, effectively cooling the furnace wall brick exposed to a high temperature of about 1500 ° C, The wear can be prevented and the life of the furnace wall can be secured.
In addition, by using high contractibility in addition to high thermal conductivity for cooling the amorphous stamp material to be filled, even when the furnace wall brick expands due to high temperature, the expansion can be reduced by the contractibility of the stamp material. Can be tolerated. Thereby, the thermal stress which generate | occur | produces in a furnace wall brick can be relieve | moderated, the crack of carbon brick can be reduced, and the lifetime improvement of a blast furnace can be aimed at.
Furthermore, even in a blast furnace without a stave, by filling a similar stamp material between the inside of the iron skin furnace and the furnace wall brick, absorption of expansion of the furnace wall brick or heat dissipation through the iron skin can be achieved. Can contribute.

Japanese Patent Laid-Open No. 9-295875 Japanese Patent Laid-Open No. 2002-121080

By the way, in the actual filling work, when direct or indirect vibration is applied by electromagnetic vibration, the vibration is not sufficiently transmitted to the whole stamp material, and therefore the filling of the stamp material is not sufficiently dense. On the other hand, a sandramer or vibrorammer performed by an operator holding a tool can strike the stamp material and impart vibrations. However, this method has the following problems.
The stamp material is struck or vibrated through human hands, expelling the air in the stamp material and filling the bottom of the blast furnace and the belly of the furnace, which requires a lot of construction time, resulting in a long blast furnace repair period. There is a problem of becoming.

In addition, at the transition part of the blast furnace, such as the transition part between the shaft part and the furnace belly part or the transition part between the morning glory part and the furnace belly part, the iron shell or the furnace inner side of the stave is inclined. A long rod-shaped rammer used for placing may interfere with the inner surface of the wall, and the back portion of such a brick may be scraped off obliquely. As a result, the layer of the stamp material becomes thick at the portion, and there is a problem that the cooling performance is deteriorated or uneven.
Furthermore, when the stamp material is placed, there is a problem that dust rises from the layer of the stamp material, which is not preferable as a working environment, and that it is not preferable from the viewpoint of leaking out of the furnace.

  Patent Documents 1 and 2 also describe that a stamp material can be pre-compressed and applied in a preform state. This preform material is a molded product with high elastic performance, and when it is constructed, it can be hit with a rammer after fitting the preform material into the filling space, although the construction time can be shortened relatively. The preform material has a low deformability according to the shape of the filling space compared to a normal stamp material, and the preform material is not sufficiently densely filled to create a space, resulting in a decrease in cooling capacity. There was a problem. For this reason, the preform material is not used for general parts and is limited to local use such as the lower part of the tuyere, which is difficult to construct with a stamp material.

  A main object of the present invention is to provide a blast furnace body structure and a blast furnace body formation method that are less likely to generate dust and the like, can shorten the work period, and can ensure cooling performance.

The blast furnace furnace structure of the present invention is a wall body that forms the outer shell of the blast furnace, a refractory material layer installed along the furnace inside of the wall body, and a refractory material layer installed along the furnace inside of the refractory material layer. In the blast furnace furnace structure having a furnace wall brick, the refractory material layer is composed of a carbonaceous solid material and a carbonaceous solidified material obtained by solidifying a carbonaceous liquid material, and a thermal conductivity λ1 of the carbonaceous solid material. = 20 to 60 W / (m · K), and thermal conductivity λ2 of the carbonaceous solidified product is 5 to 15 W / (m · K) .

In the present invention, since the refractory material layer is composed of the carbon solid material and the carbon solid material obtained by solidifying the carbon liquid material, there is no need to handle the irregular powder material as in the conventional stamp material. Does not generate dust.
Further, in the construction work, the carbonaceous solid material only needs to be inserted and fixed between the wall body and the furnace wall brick, and the work can be performed easily and quickly. Therefore, it is not necessary to hit with a rammer after fitting into the filling space as in the case of a conventional preform material.

Also, the carbonaceous liquid material is easy to handle because it is a liquid injection, and the operation can be performed easily and quickly. In particular, the carbonaceous liquid material can be injected only by filling the remaining filling space where the carbonaceous solid material is installed in the gap between the wall and the furnace wall brick, greatly reducing the filling volume. Therefore, the injection can be performed quickly.
In addition, since the carbonaceous liquid material is in a liquid state, even if the filling gap into which the carbonaceous liquid material is injected is narrow, the possibility of causing poor filling or the like is reduced. And because it is originally liquid, the carbonaceous solidified material blends well with the adjacent furnace wall brick or carbon solid material, stave surface or iron skin surface, ensuring high heat transfer performance and enhancing cooling performance as a blast furnace be able to.

There are mainly two functions necessary as a refractory material layer disposed between the wall and the furnace wall brick.
First, heat from the furnace wall brick is transmitted to the stave to effectively cool the furnace wall brick, prevent its wear and ensure the life of the furnace wall, and therefore high thermal conductivity is required. .
Secondly, when the furnace wall brick expands due to high temperature, the thermal stress generated in the furnace wall brick is alleviated, and the crack of the furnace wall brick is reduced. In order to relieve the thermal stress, the refractory layer needs to be compressible so that the expansion of the furnace wall brick can be absorbed.

Here, when all the refractory layers are made of a carbonaceous liquid material, the shrinkage of the furnace wall brick cannot be provided, and the heat conduction is low, so that the cooling capacity of the furnace wall brick is lowered.
In addition, when all of the refractory layers are made of carbon solid material, the spacing of the refractory layer varies widely around the blast furnace due to variations in furnace wall and furnace wall brick manufacturing and installation accuracy. A carbon solid material having a corresponding size is required, which is difficult as a practical technique.
That is, the present invention absorbs the thermal expansion of the furnace wall brick by the carbonaceous solid material and imparts high thermal conductivity, and absorbs the gap due to the manufacturing / installation error by the carbonaceous liquid material. It is.

  The wall body in the present invention may be composed of an iron skin and a stave installed inside the furnace, and a refractory material layer may be installed between the stave and the furnace wall brick. However, the wall body may be composed only of an iron skin, and the refractory material layer may be installed between the iron skin and the furnace wall brick.

Here, the carbonaceous liquid material used in the present invention will be described.
The carbonaceous liquid material is obtained by removing a liquid binder composed of a resin solution and / or tars, for example, from 20% by mass to 40% by mass with respect to 100% by mass of the refractory aggregate. If it is less than 20% by mass, liquefaction often becomes difficult, and if it exceeds 40% by mass, the carbonaceous ratio of the refractory aggregate is too low, and the carbonaceous liquid material is solidified to form a carbonaceous solidified product. There is a risk that the thermal conductivity deteriorates when the thermal conductivity deteriorates, or the volatile substances in the liquid binder partially volatilize due to the temperature rise after the blast furnace operation and space is generated. This is because it occurs.

The condition of the refractory aggregate required for the carbonaceous liquid material is that the proportion of the carbonaceous raw material in the refractory aggregate is 60% by mass or more.
Examples of the carbonaceous raw material in the refractory aggregate include, for example, natural graphite such as scaly graphite and earthy graphite, artificial graphite such as crushed material for steelmaking electrodes, graphite such as carbon black, coke, calcined anthracite, One or more types selected from pitch powder, carbon brick waste and the like can be mentioned. Among these, graphite is preferable from the viewpoint of thermal conductivity, and artificial graphite is preferable from the viewpoint of fluidity. The proportion of graphite in the refractory aggregate is preferably 90% by mass or more and most preferably 100% by mass in order to improve the thermal conductivity.

In addition to carbonaceous materials, refractory aggregates include metal powders such as copper and aluminum, silicon carbide, silicon nitride, sintered alumina, fused alumina, calcined alumina, rholite, chamotte, porcelain stone, clay, silica One or more selected from ultrafine silica powder such as flour, kaolin, bentonite, mullite, bauxite, and bangshale shale may be included.
The particle size of the refractory aggregate is not particularly limited, but considering the pumpability, the maximum particle size is preferably 1/3 or less of the hose diameter. In order not to cause clogging of the hose, the maximum particle size is preferably 10 mm or less, and more preferably 3 mm or less in consideration of the filling property of the construction body.

The resin solution is a resin dissolved in a solvent. Examples of the resin include phenol resin, furan resin, and silicon resin. Examples of the solvent include mono- or dihydric alcohols, polyhydric alcohols, ketones, esters. , Ethers, ketone esters, ester ethers, aromatic solvents, aliphatic solvents and the like.
Among the above resins, a phenol resin is preferable in terms of the residual carbon ratio. There are two types of phenolic resins: novolak type and resol type. Since the resol type releases condensed water during thermosetting, the novolak type is more preferable. However, since the novolac type phenol resin is a thermoplastic resin, it is necessary to use a curing agent for curing it, for example, hexamethylenetetramine or resole.

As the tars, for example, a cutback tar obtained by dissolving pitch with a solvent such as creosote oil, anthracene oil, light oil, or absorption oil in addition to anhydrous tar can be used. These have many polycyclic aromatic hydrocarbons as their components, and their molecular weight is as low as several hundreds, but they have a high melting point. For example, even when heated to around 600 ° C., they remain in a liquid state. Therefore, it is advantageous as a press-fit material binder as compared with other liquid binders that tend to evaporate at a low temperature and form voids when heated.
In addition, although a resin solution and tars may be used in a simple manner, these may be used in combination.

  Specific examples of the carbonaceous liquid material described above include, for example, compositions 1 to 4 shown in Table 1 below.

In these carbonaceous liquid materials, it is desirable that the thermal conductivity λ when solidified into a carbonaceous solid is about λ = 5 to 15 [W / m · K].
That is, if it is less than 5 [W / m · K], the cooling effect of the carbon block is greatly reduced, and therefore, 5 [W / m · K] or more is preferable. On the other hand, the thermal conductivity λ of the carbonaceous liquid material that can be added and manufactured with the phenolic resin solution as a liquid binder to the refractory aggregate has an upper limit of 15 [W / m · K].
In the construction of the carbonaceous liquid material, the above-described composition can be prepared outside the furnace and pumped into the blast furnace using a press-fitting machine such as a grout pump or a mortar pump.

Next, the carbonaceous solid material used in the present invention will be described.
As the carbonaceous solid material, a material corresponding to a so-called ramming material can be used. Specifically, for example, a material obtained by adding a liquid binder composed of a resin solution and / or tars to a refractory aggregate of 100% by mass, for example, 10% by mass to less than 20% by mass.
When the liquid binder is less than 10% by mass, it is difficult to obtain a fine workability of the structure. When the liquid binder exceeds 20% by mass, λ becomes small, and the technical significance of imparting the high thermal conductivity required for the carbonaceous solid material. Becomes smaller.

Although artificial graphite can be used as the refractory aggregate, scaly graphite in which each particle has a scale shape is preferable in order to obtain a higher volume recovery function by springback.
Moreover, you may add a metal fiber to a carbonaceous solid material. As the material for the metal fiber, iron, steel, stainless steel, aluminum, copper, or an alloy thereof is preferable because of its high thermal conductivity. The addition amount of the metal fiber is preferably 1 to 10% by mass based on the total amount of the refractory aggregate and the liquid binder.

  Metal fibers have the property of being oriented in a direction perpendicular to the striking direction. By arranging the carbonaceous solid material so that the orientation direction of the metal fiber coincides with the facing direction of the stave and the carbon brick, the volume restoration function can be obtained against repeated thermal expansion stress due to operation and shutdown of the blast furnace. This prevents the formation of gaps.

  Specific examples of the carbonaceous solid material described above include compositions 1 to 4 shown in Table 2 below, for example.

The contents described in Table 2 will be described below.
As shown in the comparative example, pressure molding cannot be performed when the amount of the phenol resin solution added as a liquid binder is 5%. With 10% of the composition 1, molding is possible, but tightening during pressure molding is insufficient, and the thermal conductivity λ is about 20 W / (m · K). 15% of the composition 2 is most preferably about 40 W / (m · K) as an additive for the liquid binder. Further, when 20% of the composition 4 with the added amount increased, the thermal conductivity λ becomes about 30 W / (m · K). Moreover, in the composition 3 to which the metal fiber is added, the thermal conductivity is further improved to about 45 W / (m · K). Composition 5 is obtained by adding artificial graphite ingot as a refractory aggregate, and the thermal conductivity is improved to about 60 W / (m · K).

A carbonaceous solid material is obtained by pressing or manually pressing these compositions into a spherical shape, an almond shape, or a plate shape. In addition, when shape | molding in a spherical form, it is preferable to have a close-packed structure according to an Andreasen distribution.
The thermal conductivity λ of the carbonaceous solid material is preferably λ ≧ 20 [W / m · K] in order to obtain the cooling effect of the carbon block. .
In addition, when a powdery refractory aggregate is used as described in the composition 3, the upper limit of λ is about 45 [W / m · K]. / M · K] is the maximum. In addition, since the composition 5 containing the graphite lump has less contractibility, it is necessary to pay attention to this point in use.

In the blast furnace furnace structure of the present invention, the carbonaceous solid material is a plate-like member installed between the wall body and the furnace wall brick, and the carbonaceous solidified material is the carbonaceous solid material and the carbonaceous material. It is desirable that the carbonaceous liquid material is filled in a filling gap left between a wall body or the carbonaceous solid material and the furnace wall brick.
In such a configuration, since the plate-shaped carbonaceous solid material is inserted into the gap between the wall body and the furnace wall brick, the work of the solid material installation process can be performed easily and quickly.

In the blast furnace furnace structure according to the present invention, the carbonaceous solid material is a granular member filled between the wall body and the furnace wall brick, and the carbon solidified material is the wall body and the furnace wall brick. It is good also as what was formed by filling the carbonaceous liquid material into the filling clearance gap left between.
Even with such a configuration, a layer of a carbonaceous solid material and a solidified carbonaceous material obtained by solidifying the carbonaceous liquid material can be formed in the gap between the wall body and the furnace wall brick. Either the granular carbonaceous solid material or the carbonaceous liquid material may be filled first, or may be injected in parallel or mixed.

In the blast furnace structure according to the present invention, it is desirable that the layer thickness t1 of the carbonaceous solid material> the layer thickness t2 of the carbonized solidified product.
In such a configuration, in general, a carbon solid material capable of increasing the thermal conductivity is effectively used by reducing the layer thickness of the solidified carbonaceous material obtained by solidifying the carbonaceous liquid material having a small thermal conductivity. The heat conduction performance in the refractory material layer can be improved, and the furnace wall brick can be efficiently cooled.

The method of forming a blast furnace furnace body according to the present invention is a plate-like carbon material having a thermal conductivity of λ1 = 20 to 60 W / (m · K) between a wall body and a furnace wall brick installed inside the furnace body. A solid material installation step for installing a solid material, and a carbonaceous liquid material is injected into a filling gap left between the carbon solid material and the wall body or between the carbon solid material and the furnace wall brick. is to solidify, characterized in that it comprises a carbonaceous solidified product and to that the liquid material filling process of thermal conductivity λ2 = 5~15W / (m · K ), the.
In the present invention, since the refractory material layer is composed of a solid carbonaceous material and a solidified carbonaceous material obtained by solidifying a carbonaceous liquid material, dust is generated without handling an irregular powder material as in the past. I will not let you.
Further, in the solid material installation process, it is only necessary to insert and fix the carbonaceous solid material between the wall body and the furnace wall brick, and the operation can be performed easily and quickly.

Further, in the liquid material filling step, the carbonaceous liquid material is filled into the remaining filling gap except for the previously installed carbonaceous solid material in the gap between the wall body and the furnace wall brick. At this time, the carbonaceous liquid material is easy to handle because it is a liquid injection, and the filling volume is greatly suppressed by the carbonaceous solid material previously installed, so that the operation can be performed easily and quickly.
In addition, since the carbonaceous liquid material is in a liquid state, even if the filling gap into which the carbonaceous liquid material is injected is narrow, the possibility of causing poor filling or the like is reduced. And because it is originally liquid, the carbonaceous solidified material blends well with the adjacent furnace wall brick or carbon solid material, stave surface or iron skin surface, ensuring high heat transfer performance and enhancing cooling performance as a blast furnace be able to.

In the blast furnace furnace forming method of the present invention, the solid material installation step includes a solid material fixing step of fixing the plate-like carbonaceous solid material in a gap between the wall body and the furnace wall brick, and the wall It is desirable to have a furnace wall brick installation step of installing the furnace wall brick with a space inside the furnace inside the body.
In such a configuration, since the plate-shaped carbonaceous solid material is inserted into the gap between the wall body and the furnace wall brick, the work of the solid material installation process can be performed easily and quickly.

In the method for forming a blast furnace furnace body according to the present invention, a plate-like carbonaceous solid material having the same size as the end surface is pasted on the wall body side end surface of the brick block for the furnace wall brick in advance to form a brick block with a solid material. A block preparatory step to be formed, and a block construction step in which the brick wall with solid material is stacked at a space inside the furnace of the wall body, and the furnace wall brick is installed, and the furnace is formed by the block construction step. It is desirable that the wall brick installation step and the solid material fixing step are performed. In such a configuration, a plate-like carbonaceous solid material having the same size as the end surface is attached in advance to the wall body side end surface of the brick block. Therefore, by installing the furnace wall brick, the installation of the solid material is performed, and the furnace wall brick installation process and the solid material installation process are performed at the same time, so that the furnace body forming operation can be performed easily and quickly. .

The method of forming a blast furnace furnace body according to the present invention includes a solid material installation step of filling a granular carbonaceous solid material between a wall body and a furnace wall brick installed inside the furnace, the wall body and the furnace wall brick. And a liquid material filling step of injecting and solidifying the carbonaceous liquid material into the filling gap left between the two.
Alternatively, a liquid material installation step of filling a carbonaceous liquid material between a wall body and a furnace wall brick installed inside the furnace, and filling the carbonaceous liquid material with a granular carbonaceous solid material A solid material filling step for solidifying the carbonaceous liquid material.
Even with such a configuration, a layer of a carbonaceous solid material and a solidified carbonaceous material obtained by solidifying the carbonaceous liquid material can be formed in the gap between the wall body and the furnace wall brick. Furthermore, instead of filling either the granular carbonaceous solid material or the carbonaceous liquid material first, these may be injected in parallel or mixed.

  According to the present invention, a carbonaceous solid material imparting elastic performance and high thermal conductivity between a wall body and a furnace wall brick installed inside the furnace, and a carbonaceous solidified material obtained by solidifying a carbonaceous liquid material Since it has a blast furnace body structure filled with, it is difficult to generate dust during construction, and cooling performance can be secured while shortening the construction period.

The cross-sectional view which shows the furnace body of 1st Embodiment of this invention. The longitudinal cross-sectional view which shows the 1st step | paragraph solid material installation process of the said 1st Embodiment. The longitudinal cross-sectional view which shows the liquid material filling process of the 1st step | paragraph of the said 1st Embodiment. The longitudinal cross-sectional view which shows the 2nd step | paragraph solid material installation process of the said 1st Embodiment. The longitudinal cross-sectional view which shows the liquid material filling process of the 2nd step | paragraph of the said 1st Embodiment. The longitudinal cross-sectional view which shows the solid material installation process of 2nd Embodiment of this invention. The longitudinal cross-sectional view which shows the injection | pouring middle of the liquid material filling process of the said 2nd Embodiment. The longitudinal cross-sectional view which shows the liquid material filling process of the said 2nd Embodiment in the middle of solidification. The cross-sectional view which shows the furnace body of 3rd Embodiment of this invention. The perspective view which shows the brick block with a solid material used in the said 3rd Embodiment. The longitudinal cross-sectional view which shows the 1st step | paragraph solid material installation process thru | or liquid material filling process of the said 3rd Embodiment. The longitudinal cross-sectional view which shows the 2nd step | paragraph solid material installation process of the said 3rd Embodiment. The longitudinal cross-sectional view which shows the solid material installation process thru | or liquid material filling process of 4th Embodiment of this invention. The longitudinal cross-sectional view which shows the solid material installation process of the said 4th Embodiment. The longitudinal cross-sectional view which shows the solid material installation process and liquid material filling process of 5th Embodiment of this invention. The cross-sectional view which shows the furnace body of 6th Embodiment of this invention. The cross-sectional view which shows the solid material installation process of the said 5th Embodiment. The cross-sectional view which shows the solid material installation process of the said 5th Embodiment. The longitudinal cross-sectional view which shows the solid material installation process of the said 5th Embodiment. The longitudinal cross-sectional view which shows the installation state of the refractory material layer in the transition part of the shaft part by this invention, a furnace part, and a morning glory part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First Embodiment]
FIG. 1 shows a first embodiment of the present invention.
In FIG. 1, the blast furnace body structure of the present embodiment includes a wall body 2 forming an outer shell of the blast furnace 1, a refractory material layer 3 installed along the furnace inner side of the wall body 2, and a refractory material layer 3. And a furnace wall brick 4 installed along the inside of the furnace.

The wall body 2 includes a cylindrical iron skin 21 formed by joining iron plates and a strip-shaped stave 22 that is a cooling device installed inside the furnace.
The refractory material layer 3 is filled between the layer of the plate-like carbonaceous solid material 31 pasted along the furnace inner surface side of the stave 22 and the layer of the carbonaceous solid material 31 and the aforementioned furnace wall brick 4. It is comprised with the layer of the carbonaceous solidified material 32 which the solidified carbonaceous liquid material solidified.
The furnace wall brick 4 is constructed of carbon brick blocks 41 at predetermined intervals from the furnace inner surface side of the stave 22.

In this embodiment, the furnace body of the blast furnace 1 is formed in the following procedures.
First, the iron skin 21 is assembled on the foundation of the blast furnace 1, the stave 22 is installed inside the furnace, and the wall body 2 is formed by these.
Next, the refractory material layer 3 and the furnace wall brick 4 are constructed inside the wall body 2 according to the procedure shown in FIGS.

First, as shown in FIG. 2, a carbonaceous solid material 31 having a thickness of C2 is attached and fixed to the inner surface of the wall 2 (furnace inner surface of the stave 22), and a predetermined interval C3 is provided inside thereof. Then, one brick block 41 to be the furnace wall brick 4 is installed side by side. At this time, the brick block 41 and the carbonaceous solid material 31 are set to the same height, and thereby the one-stage carbonaceous solid material 31 and the brick block 41 are installed (solid material installation step).
A filling gap 33 is formed by an interval C3 between the carbonaceous solid material 31 and the brick block 41. When the thickness C2 of the carbonaceous solid material 31 and the distance C1 from the furnace inner surface of the wall body 2 to the furnace outer surface of the brick block 41, the interval C3 of the filling space 33 is C1-C2.

  As shown in FIG. 3, a carbonaceous liquid material 34 is injected into the filling gap 33. The injected carbonaceous liquid material 34 is solidified after a predetermined time, and becomes a carbonaceous solidified product 32 as shown in FIG. As a result, the filling gap 33 is filled with the carbonaceous solidified product 32, and the first refractory material layer 3 is formed between the wall body 2 and the furnace wall brick 4 (liquid material filling step).

Next, as shown in FIG. 4, the second-stage carbonaceous solid material 31 is disposed on the first-stage carbonaceous solid material 31 and fixed to the wall body 2 (stave 22), and the first-stage carbonaceous solid material 31 is disposed. The second brick block 41 is stacked and fixed on the brick block 41 (solid material installation step). As a result, a second-stage filling gap 33 is formed. Therefore, as shown in FIG. 5, a carbonaceous liquid material 34 is injected into the second-stage filling gap 33 and solidified to inject the first-stage filling gap 33. The second carbon solidified product 32 is stacked on the carbon solidified product 32 (liquid material filling step).
As described above, in the present embodiment, the multi-stage furnace wall brick 4 and the refractory material layer 3 are constructed by repeating the solid material installation process and the liquid material filling process for each stage.

  The above-described installation of the carbon solid material 31 and the brick block 41 (solid material installation step) and the injection of the carbonaceous liquid material 34 (liquid material filling step) may be sequentially repeated step by step. Are not limited to alternating, but may be partially overlapped. For example, the installation of the carbon solid material 31 in the next stage (solid material installation process) may proceed in parallel with the time when the injection of the carbon liquid material 34 in the previous stage (liquid material filling process) is performed. Such process duplication can be expected to improve work efficiency and shorten the construction period.

In addition, the carbonaceous solid material 31 is fixed to the wall body 2 first, and the carbonaceous solid material 31 is first fixed to the wall body 2 without being limited to the procedure of fixing the brick block 41 with the filling gap 33 thereafter. After that, the filling gap 33 is opened and the brick blocks 41 are arranged at a distance C1 from the inner surface of the furnace body 2, and the carbon solid material 31 is inserted later and fixed to the inner surface of the furnace body 2. May be.
At this time, if the brick block 41 is installed at a distance C1 from the inner surface of the wall 2 (furnace inner surface of the stave 22), the thickness C3 of the filling space 33 is obtained as the thickness C2 of the carbonaceous solid material 31. = C1-C2.

  When fixing the carbonaceous solid material 31 to the furnace inner surface of the furnace body 2, if the mortar is applied in advance, the carbonaceous solid material 31 can be easily pasted simply by pressing against the furnace inner surface of the furnace body 2. it can.

The height dimension of the carbonaceous solid material 31 is not limited to the same height as the brick block 41, and may be a height of a plurality of steps (an integral multiple of the height of the brick block 41). In this case, for one installation of the carbonaceous solid material 31 (solid material installation step), the brick block 41 is installed and the carbonaceous liquid material 34 is injected into the filling gap 33 formed thereby (liquid material filling step). ) Will be repeated multiple times.
On the other hand, when the carbonaceous solid material 31 and the brick block 41 are set to the same height, after stacking them in a plurality of stages (solid material installation step), carbon is collectively put into a plurality of filling gaps 33 corresponding to each other. The liquid material 34 may be injected (liquid material filling step).

[Second Embodiment]
In the second embodiment of the present invention, the blast furnace 1, the wall body 2, the refractory material layer 3 and the furnace wall brick 4 which are basic configurations are the same as those in the first embodiment described above (see FIG. 1).
In this embodiment, the construction procedures of the refractory material layer 3 and the furnace wall brick 4 are different, and the three steps of the brick block 41 are collectively assembled.

First, as shown in FIG. 6, a solid carbon material 31 having a height of three steps of the brick block 41 is attached and fixed to the inner surface of the wall 2, and a predetermined interval C <b> 3 is provided on the inner side. Stack brick blocks 41 for three levels. Three brick blocks 41 to be the furnace wall bricks 4 are stacked inside the furnace of the wall body 2 with a predetermined interval C1, and the carbon solid material 31 having the same height as the three brick blocks 41 is walled. You may affix on the inside of 2 furnaces.
As a result, three steps of brick blocks 41 and a carbonaceous solid material 31 having the same height are constructed on the inner side of the furnace of the wall body 2, and a three-step height filling gap 33 is formed between each of them. Is formed (solid material installation step).

Next, as shown in FIG. 7, the carbonaceous liquid material 34 is poured into the filling gap 33 to a height of three steps (liquid material filling step). As shown in FIG. 8, the carbonaceous liquid material 34 filled up to the height of three steps is solidified, so that a three-step solidified carbonaceous matter 32 is formed inside the furnace of the wall body 2. The refractory material layer 3 for three steps is formed together with the carbonaceous solid material 31 attached to the inside of the furnace 2.
As described above, in this embodiment, the multi-stage furnace wall brick 4 and the refractory material layer 3 are constructed by repeating the solid material installation process and the liquid material filling process every three stages.

  In this embodiment, since the height of the general brick block 41 is about 600 mm, the operation of dividing the work into three stages results in the attachment height of the carbonaceous solid material 31 being 1800 mm. With this height, the same kind of work can be performed continuously and efficiently without particularly using a scaffold or the like, and workability can be improved.

[Third Embodiment]
FIG. 9 shows a third embodiment of the present invention.
In the present embodiment, the blast furnace 1, the wall 2, the refractory material layer 3, and the furnace wall brick 4 which are basic configurations are the same as those in the first embodiment (see FIG. 1) described above.
However, in the refractory material layer 3 of the first embodiment of FIG. 1, the outer side is the carbonaceous solid material 31 and the inner side is the carbonaceous solidified product 32, whereas in the present embodiment, the outer side of the refractory material layer 3 is reversed. Is a solidified carbonaceous material 32 and the inside is a carbonaceous solid material 31.
Moreover, in this embodiment, as shown in FIG. 10, the brick with a solid material which stuck the plate-shaped carbonaceous solid material 31 of the same magnitude | size as the said end surface in advance to the end surface of the outer side (wall side) of the brick block 41. Block 42 is used.

In this embodiment, the furnace body of the blast furnace 1 is formed in the following procedures.
First, the iron skin 21 is assembled on the foundation of the blast furnace 1, the stave 22 is installed inside the furnace, and the wall body 2 is formed by these.
Next, the refractory material layer 3 and the furnace wall brick 4 are constructed inside the wall body 2 according to the procedure shown in FIGS.

First, as shown in FIG. 11, the brick blocks 42 with solid material are arranged one stage at a predetermined interval C <b> 3 that becomes the filling gap 33 inside the furnace of the wall body 2. Of the arranged brick blocks with solid material 42, the brick block 41 part is continuous to form the first-stage furnace wall brick 4, and the plate-like carbonaceous solid material 31 is continuous on the outer surface thereof. Arranged (solid material installation step).
Next, a carbonaceous liquid material 34 is injected into the filling gap 33 for one stage. The injected carbonaceous liquid material 34 is solidified after elapse of a predetermined time, and becomes a carbonaceous solidified product 32 as shown in FIG. 12 (liquid material filling step). Thereby, the carbonaceous solidified material 32 solidified in the filling gap 33 and the carbonaceous solid material 31 stuck on the above-described brick block with solid material 42 are arranged in one step between the wall body 2 and the furnace wall brick 4. An eye refractory material layer 3 is formed.

Next, as shown in FIG. 12, the second-stage filling gap is formed by stacking the second-stage solid-material brick blocks 42 on the first-stage solid-material brick blocks 42 (solid material installation step). 33 is formed. By injecting the carbonaceous liquid material 34 into the second filling gap 33 and solidifying it (liquid material filling process), the second and subsequent stages are formed in the same manner as the first stage.
As described above, in the present embodiment, the multi-stage furnace wall brick 4 and the refractory material layer 3 are constructed by repeating the solid material installation process and the liquid material filling process for each stage.

  In the present embodiment, the filling height of the carbonaceous liquid material 34 may be the same as that of the brick block 42 with a solid material, but it is desirable to lower it by several tens of mm. This is due to the prevention of overflow due to variations in filling of the carbonaceous liquid material 34, and the upper and lower connecting portions and the solid material brick block 42 when the carbonaceous liquid material 34 becomes a solidified carbonized material 32. This is because it is effective for preventing gas leaks inside and outside the furnace.

[Fourth Embodiment]
In the fourth embodiment of the present invention, the basic structure of the blast furnace 1, the wall body 2, the refractory material layer 3, and the furnace wall brick 4 is the same as that of the third embodiment described above (see FIG. 9). The same applies to the use of the block 42 (see FIG. 10).
In this embodiment, the construction procedures of the refractory material layer 3 and the furnace wall brick 4 are different, and the three steps of the brick block 41 are collectively assembled.

First, as shown in FIG. 13, the brick blocks 42 with a solid material are piled up in three stages at a predetermined interval C3 that becomes the filling gap 33 inside the furnace of the wall body 2 (solid material installation step). As a result, a filling gap 33 having a height of three stages is formed inside the furnace of the wall body 2.
Next, the carbonaceous liquid material 34 is poured into the filling gap 33 to a height of three steps. As shown in FIG. 14, when the carbonaceous liquid material 34 filled in the filling gap 33 is solidified, three stages of carbonized solidified products 32 are formed inside the furnace of the wall body 2 (liquid material filling step). ), Three steps of the refractory material layer 3 are formed together with the carbonaceous solid material 31 of the brick block with solid material 42.
As described above, in this embodiment, the multi-stage furnace wall brick 4 and the refractory material layer 3 are constructed by repeating the solid material installation process and the liquid material filling process every three stages.

  In the present embodiment, the solid material brick block 42 is stacked in three stages as the solid material installation process, and then the liquid material filling process is not limited to the procedure of filling the three-stage carbonaceous liquid material 34. Each process may be partially paralleled, for example, the filling of the carbonaceous liquid material 34 is started at the stage where the brick blocks 42 are stacked for one stage or two stages. Such process duplication can be expected to improve work efficiency and shorten the construction period.

[Fifth Embodiment]
In the fifth embodiment of the present invention, the blast furnace 1, the wall body 2 and the furnace wall brick 4 which are basic configurations are the same as those in the first to fourth embodiments described above (FIG. 5, FIG. 8, FIG. 12 or (See FIG. 14).
In each of the first to fourth embodiments, the carbonaceous solid material 31 is a plate-like member disposed between the wall body 2 and the furnace wall brick 4, and the carbonaceous solidified material 32 is placed in the filling gap 33. It was formed by the filled carbonaceous liquid material 34.
In contrast, in the present embodiment, as shown in FIG. 15, filled with a carbonaceous solid material 31 and carbonaceous liquid material 3 4 granular between the furnace inner surface of the furnace wall bricks 4 and the furnace wall 2 by carbonaceous liquid material 3 4 becomes carbonaceous solidified 32 was solidified to form a refractory material layer 3 containing carbonaceous solid material 31 in granular form.

In the present embodiment, it is desirable that the granular carbonaceous solid material 31 has a diameter of 20 to 50 mm. If the diameter is smaller than 20 mm, the preform is difficult, and if the diameter is larger than 50 mm, a bridge is formed at the time of filling and the possibility of poor filling increases.
When filling the space between the wall body 2 and the furnace wall brick 4, the carbonaceous solid material 31 may be filled first and the carbonaceous liquid material 34 may be injected later, or the carbonaceous liquid material 34 may be injected first. The carbonaceous solid material 31 may be filled later, or the carbonaceous solid material 31 and the carbonaceous liquid material 34 may be filled simultaneously, or each may be filled as a mixture. .

When the carbonaceous solid material 31 is filled first, the carbonaceous liquid material 34 is poured into the gap between the particles of the carbonaceous solid material 31 filled between the wall body 2 and the furnace wall brick 4.
When the carbonaceous liquid material 34 is injected first, the specific gravity of the carbonaceous solid material 31 is generally larger than that of the carbonaceous liquid material 34, and it takes 2-3 hours to solidify the carbonaceous liquid material 34. The filled carbonaceous solid particles 31 settle in the carbonaceous liquid material 34 and can be in a state of being closely packed between the wall body 2 and the furnace wall brick 4.
Furthermore, the process of filling the carbonaceous solid material 31 to a predetermined height and then filling the carbonaceous liquid material 34 to a predetermined height may be repeated, or each of them may be injected simultaneously.

The filling of the granular carbonaceous solid material 31 and the carbonaceous liquid material 34 as described above may be performed every time one stage of the furnace wall brick 4 is stacked, or several stages of the furnace wall brick 4 are stacked. You may go from.

[Sixth Embodiment]
In the sixth embodiment of the present invention, the basic structure of the blast furnace 1, the wall body 2, the refractory material layer 3 and the furnace wall brick 4 are the same as those in the first to fourth embodiments described above (FIGS. 5 and 5). 8, see FIG. 12 or FIG. In constructing these configurations, the refractory material layer 3 and the furnace wall brick 4 are stepped from the bottom in the inner side of the wall body 2 of the blast furnace 1 by the procedure of any of the first to fourth embodiments described above. Stack up.
Here, in this embodiment, a brick block having a different size and shape is used for a part of the furnace wall brick 4 and construction is performed using a jack so as to enhance the adhesion between the brick blocks.

In FIG. 16, a carbonaceous solid material 31 is stretched inside the furnace wall 2 of the blast furnace 1, and the furnace wall bricks 4 are installed at predetermined intervals on the inside. A filling gap 33 between the furnace wall brick 4 and the carbonaceous solid material 31 is filled with a carbonaceous liquid material 34, which is solidified to become a carbonaceous solidified material 32. The above is the same as the first to fourth embodiments described above, and any one of the procedures of each embodiment can be adopted.
Here, in each embodiment mentioned above, the furnace wall brick 4 was formed with the same brick block 41 (or brick block 42 with a solid material) over the perimeter. In this embodiment, most of the circumferential direction is the brick block 41, but a short brick block 43 is used for a part of the circumferential direction.

The brick block 41 has a predetermined thickness dimension in the radial direction (diameter direction of the blast furnace 1), and the planar shape is tapered so that the brick blocks 41 come into close contact with each other when arranged in the circumferential direction.
The short brick block 43 has a tapered shape similar to that of the brick block 41 and has a short radial dimension. The short brick block 43 has a shape in which a part of the outer peripheral side of the brick block 41 is removed, and the brick block 41 and the inner peripheral side face are in close contact with each other to form the furnace wall brick 4 over the entire circumference. be able to.

In such this embodiment, the furnace wall brick 4 is formed in the procedure described below.
As shown in FIG. 16, first, a brick block 41 is installed on the upper surface of the lower furnace wall brick 4 so as to be substantially the entire circumference. The first brick block 41 is set at a position A0 in FIG. 16, and is sequentially arranged at positions A1, A2,. Installation of the brick block 41 ends at a position AE where a predetermined number (three in this embodiment) remains.
The brick blocks 41 (positions A0 to AE) can be installed by placing the brick block 41 on the upper surface of the lower furnace wall brick 4 from the inside and sliding it outward in the horizontal direction.

Next, the short brick block 43 is installed in a portion where the brick block 41 is not installed (positions B0 to B1 sandwiched between two positions AE). In installation, the short brick block 43 first installs two short brick blocks 43 at a position B1, and installs the last short brick block 43 at a position B0 therebetween.
Under the present circumstances, the short brick block 43 of position B1 is arrange | positioned in the position close | similar to the outer peripheral side as much as possible, and the clearance gap between a pair of short brick block 43 is maximized by making it contact with the brick block 41 of position AE. By setting this gap to be equal to or larger than the width WB on the outer peripheral side of the short brick block 43, the last short brick block 43 can be slid from the inside.
When this gap cannot be obtained, it is necessary to take measures such as lifting the last brick block upward and then lowering it to the position B0.

The short brick block 43 is moved to a regular position using a jack.
As shown in FIGS. 18 and 19, a hydraulic jack 44 is installed on the upper surface of the short brick block 43, one end of the jack 44 is brought into contact with the furnace wall 2, and the short brick block 43 is attached to the other end. It is configured to push toward the center of the blast furnace 1. For example, by using a crank-type jig 45 and connecting the jack 44 on the upper surface of the short brick block 43 and the outer peripheral side surface of the short brick block 43, the outer peripheral side surface of the short brick block 43 is pushed. Can do.

  With such a configuration, each of the short brick blocks 43 at the positions B0 to B1 is slid inward, so that the inner peripheral surface of the short brick block 43 at the positions B0 to B1 and the brick blocks at the other positions A0 to AE. The inner peripheral surface of 41 can form the same cylindrical surface. In this state, all the blocks of the short brick block 43 at the positions B0 to B1 and the brick block 41 at the positions A0 to AE are in close contact with each other, and the one-step furnace wall brick 4 is formed.

  The short brick blocks 43 are not limited to the three positions B0 to B1, but may be one, two, or four or more. In order to allow passage of the last short brick block 43, when the number is small, the radial dimension of the short brick block 43 needs to be significantly thinner than the brick block 41, for example, about 50 mm, but the number is large. For example, it is only necessary to make it about 10 mm thinner. Making the short brick block 43 thinner leads to the carbonaceous liquid material 34 in that portion becoming thicker, and it is better not to make it too thin in terms of cooling performance. In this respect, the preferred number of short brick blocks 43 is 3-5.

[Modification]
In addition, this invention is not limited to said each embodiment, The following modifications are also contained in this invention.
In each of the embodiments described above, the blast furnace wall 2 includes the iron skin 21 and the stave 22. However, the cooling device is not limited to the stave 22 and may be a pipe line through which cooling water passes. If it is a furnace etc. which sprinkles and cools the outer side of 21, the wall 2 may be comprised only with the iron skin 21. FIG. Even in such a case, the same blast furnace body forming method can be applied.
In each of the above-described embodiments, it is not necessary to secure the conventional intervals required for filling the refractory material even at the transition portion of the bottom, the sump, the tuyere, and the morning glory of the blast furnace.

In FIG. 20, the blast furnace 1 includes a wall 2 formed of an iron skin 21 and a stave 22, a refractory material layer 3 formed of a carbonaceous solid material 31 and a carbonized solidified product 32, and bricks as in the above embodiments. It has a furnace wall brick 4 formed by a block 41.
The blast furnace 1 has a morning glory part Z3, a tuyere part Z2, and a hot water reservoir part Z1, and is bent at transition parts Z23 and Z12 between them. In the bent transition part, the iron skin 21, the carbonaceous solid material 31 and the carbon solidified product 32 are also bent.

  Conventionally, as shown by a chain line in FIG. 20, the rammer 9 for stamping the carbonaceous filler by keeping the furnace wall brick 4 in the bent transition portion and making a space between the iron skin 21 large. The work cost was secured. On the other hand, in each embodiment based on this invention, while installing the carbonaceous solid material 31 (solid material installation process), the carbonaceous liquid material 34 is inject | poured and the carbonaceous solidified material 32 is formed (liquid material). Therefore, the rammer 9 is unnecessary, and the distance between the iron skin 21, the furnace wall brick 4 and the refractory material layer 3 can be made constant as shown in FIG.

As an example of the present invention, using the composition 4 of Table 1 as the carbonaceous liquid material and using the composition 2 of Table 2 as the carbonaceous solid material, A carbonaceous solid material 31 imparting elastic performance and high thermal conductivity is installed between the furnace wall brick 4 installed inside the furnace, and then a gap between the carbonaceous solid material 31 and the brick block 41. C3 filled with carbonaceous liquid material filling the gap 33 formed by, after a carbonaceous solidified 3 2 carbonaceous liquid material 3 4 solidifies, repeatedly placing the next carbonaceous solid material Thus, a blast furnace structure having a cross section as shown in FIG. 1 was constructed.

As a result, there was almost no generation of dust during construction, and the construction period of the furnace was about 5 days longer than that of the conventional stamp material sand rammer construction method. The construction period of the material and the carbonaceous liquid material was reduced to 2.5 days. In addition, the cooling performance was as good as conventional stamping, and the blast furnace operated smoothly.
Further, as shown in FIG. 15, filled with a carbonaceous solid material 31 and carbonaceous liquid material 3 4 granular between the furnace inner surface of the furnace wall bricks 4 and the furnace wall 2, carbonaceous liquid material 3 4 When solidified into a carbonaceous solid product 32, similarly, there was almost no generation of dust or the like during construction, and the construction period was also compared with the conventional construction method using sand rammer of stamp material, Shortened from 5 days to 2.5 days. In addition, the cooling performance was as good as conventional stamping, and the blast furnace operated smoothly.

  The present invention relates to a blast furnace body structure and a blast furnace body formation method, and can be used as a structure of a blast furnace body having a furnace wall brick on the inner side of a furnace and a method for forming the same.

DESCRIPTION OF SYMBOLS 1 ... Blast furnace 2 ... Wall body 21 ... Iron skin 22 ... Stave 3 ... Refractory material layer 31 ... Carbonaceous solid material 32 ... Carbonaceous solidified material 33 ... Filling gap 34 ... Carbonaceous liquid material 4 ... Furnace wall bricks 41, 43 ... Brick block 42 ... Brick block with solid material

Claims (9)

A blast furnace having a wall body forming an outer shell of the blast furnace, a refractory material layer installed along the furnace inner side of the wall body, and a furnace wall brick installed along the furnace inner side of the refractory material layer In the body structure,
The refractory material layer is composed of a carbonaceous solid material and a carbonaceous solidified material obtained by solidifying a carbonaceous liquid material, and the thermal conductivity of the carbonaceous solid material is λ1 = 20 to 60 W / (m · K), A blast furnace furnace structure characterized in that the carbonized solid has a thermal conductivity λ2 = 5 to 15 W / (m · K) . In the blast furnace structure according to claim 1,
The carbonaceous solid material is a plate-like member installed between the wall body and the furnace wall brick, and the carbonaceous solidified material is the carbonaceous solid material and the wall body or the carbonaceous solid material. A blast furnace furnace structure characterized in that it is formed by filling the carbonaceous liquid material into a filling gap left between the furnace wall bricks. In the blast furnace structure according to claim 1,
The carbon solid material is a granular member filled between the wall body and the furnace wall brick, and the carbon solidified material is a filling gap left between the wall body and the furnace wall brick. A blast furnace furnace structure characterized by being formed by filling the carbonaceous liquid material into the blast furnace. In the blast furnace structure according to claim 1 or 2 ,
Blast furnace furnace structure characterized in that the layer thickness t1 of the carbonaceous solid material> the layer thickness t2 of the solidified carbonaceous material. A solid material installation step of installing a carbonaceous solid material having a plate shape and a thermal conductivity of λ1 = 20 to 60 W / (m · K) between a wall body and a furnace wall brick installed inside the furnace; The carbonaceous liquid material is injected and solidified in the filling gap left between the carbonaceous solid material and the wall or between the carbonaceous solid material and the furnace wall brick, and the thermal conductivity λ2 = 5～15W / blast furnace body forming method characterized by having a liquid material filling process shall be the carbonaceous solidified product of (m · K). In the blast furnace body forming method according to claim 5 ,
The solid material installation step includes a solid material fixing step of fixing the plate-like carbonaceous solid material in a gap between the wall body and the furnace wall brick, and a space inside the furnace of the wall body with an interval. And a furnace wall brick installation process for installing the furnace wall brick. In the method for forming a blast furnace furnace body according to claim 6 ,
In the solid material installation step, a block that forms a brick block with a solid material by sticking in advance a plate-like carbonaceous solid material having the same size as the end surface to the wall body side end surface of the brick block for the furnace wall brick. A preparatory step, and a block construction step of installing the solid brick brick block with a space inside the furnace of the wall body and installing the brick wall brick, and installing the furnace wall brick by the block construction step A method for forming a blast furnace body, wherein a step and a solid material fixing step are performed.   In the solid material installation step of filling a granular carbonaceous solid material between the wall body and the furnace wall brick installed inside the furnace, and in the filling gap left between the wall body and the furnace wall brick And a liquid material filling step for injecting and solidifying the carbonaceous liquid material.   A liquid material installation step of filling a carbonaceous liquid material between a wall body and a furnace wall brick installed inside the furnace; and filling the carbonaceous liquid material with a granular carbonaceous solid material, And a solid material filling step for solidifying the liquid material.

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