JP3222698B2 - Aging pit of steam aging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam aging facility for steelmaking slag and electric furnace slag, and more particularly, to a hydration reaction of unslagged lime in crushed slag by using steam under air. The present invention relates to a configuration of an aging pit in an accelerated steam aging facility.

[0002]

2. Description of the Related Art Steelmaking slag generated at the stage of producing steel by a converter or an electric furnace has been used in recent years as a roadbed material for roads, and its use has been expanding more and more. It is known that in order to use steelmaking slag as a roadbed material, it is necessary to further stabilize free lime in the slag by a hydration reaction (this is called aging). In this case, depending on the type of steel, some steelmaking slag expands by about 10 to 12% if it is high during aging. FIG. 12 is a diagram showing the change with time of the expansion pressure applied to the actual concrete aging pit.
An expansion pressure of 1.5 ton / m ² is applied. For this reason, conventionally, the slag was simply piled up on the horizontal ground in which the steam piping was buried so as not to be directly affected by the inflation pressure. In addition, there is a disadvantage that the quality after aging varies.

[0003] Fig. 13 shows a typical prior art of steam aging equipment for steelmaking slag which can solve such a problem. The aging pit provided in the illustrated steam aging facility has a structure in which a plurality of divided angled concrete block walls B are arranged in a U-shape, and the concrete block wall B is one of four side walls. Each concrete block wall B moves outward due to the expansion of the steelmaking slag deposited on the inside, which is used as a pit consisting of three side walls and a horizontal ground where the surface and the top surface are open. Each time, a mechanical force, such as a truck crane, is used to correct the original position. Alternatively, in addition to the above structure, a structure in which a side wall is fixed and a waste tire is mounted inside the wall as a structure for absorbing the inflation pressure of the slag has been conventionally used in part.

[0004]

The former in the prior art has problems in terms of efficiency and economy because it takes time and labor to operate a truck crane or the like to relocate the concrete block wall. In the latter case, frequent replacement is necessary because the waste tire deteriorates due to the heat of steam, and if this replacement is neglected, problems such as cracks in the pit wall are unavoidable. A pit consisting of an integral wall made of steel has a drawback in that frequent repairs must be performed due to cracks caused by expansion of the slag, and on the contrary the equipment cost rises.

The present invention has been made in order to solve such problems, and an object of the present invention is to eliminate labor such as rearrangement of a concrete block wall and to save labor. An object of the present invention is to provide an aging pit of a steam aging facility capable of easily absorbing the expansion pressure of slag and extending the life of the apparatus by enhancing the resistance of steam to heat. It is also an important object of the present invention to provide an aging pit for a steam aging facility that can easily stack and discharge slag and that can stabilize the quality of aged slag.

[0006]

The present invention has the following configuration to achieve the above object. That is, according to the present invention, a moving wall is provided on an aging pit side wall in an aging pit of a steam aging facility for steam aging steelmaking slag or electric furnace slag under the atmosphere by supplying steam from below. When the steam aging process is started, the slag moves in accordance with the expansion pressure of the slag, and after the steam aging process is completed, the slag is formed so as to be self-returned to the initial position before the movement as the slag is discharged. An aging pit of a steam aging facility, characterized in that:

The present invention also relates to an aging pit of a steam aging facility in which a moving wall of the aging pit side wall, on which a moving wall slides, is moved by its own weight formed on a slope having a downward slope toward the inside of the pit. Yes, and a fixed wall is provided on the aging pit side wall,
A movable wall is provided movably opposed to the fixed wall so as to be able to come in contact with and separate from the fixed wall inside, and the movable wall is provided by one or more elastic bodies interposed between the fixed wall and the movable wall. Is an aging pit of a moving type steam aging facility.

According to the present invention, in the aging pit of the steam aging equipment as described in the preceding paragraph, the moving wall provided on the side wall of the aging pit is divided into a plurality of sections and arranged so as to be connected in the width direction. In an aging pit of a steam aging facility of a self-weight moving type, a moving wall has a built-in weight capable of adjusting the weight, and the weight of the moving wall itself can be adjusted to a predetermined value.
The present invention is also characterized in that the elastic body is a spring in the aging pit of the steam aging equipment of the elastic force transfer type.

The present invention also provides an aging pit of a steam aging facility in which a moving wall is divided into a plurality of sections and is connected to each other in the width direction. A moving wall guide for guiding and sliding in a predetermined direction is provided. In this case, at least the aging pit side wall, the moving wall, and the moving wall guide are in sliding contact with each other. In a preferred embodiment, the surface and the surface in contact with the steelmaking slag are made of steel.

[0010] The present invention also provides an aging pit of a steam aging facility in which a moving wall is divided into a plurality of sections and is connected in the width direction. It is characterized in that it is a configuration in which a seal plate for closing is attached, in this case, the seal plate, via a hook-shaped attachment member attached to its upper edge, In a preferred embodiment, the movable wall is detachably attached to an upper portion of a corresponding moving wall.

[0011]

According to the present invention, the moving wall provided on the side wall of the aging pit does not move under the static pressure (earth pressure) of steelmaking slag or electric furnace slag (hereinafter, abbreviated as slag), and expands in addition thereto. It is provided to move only when pressure is applied. Here, the static pressure of the slag acting on the vertical wall is determined by the specific gravity of the slag and the height (depth) of stacking. Therefore, according to the material of the moving wall that moves, the necessary minimum weight of the moving wall unit is determined by the coefficient of friction (resistance coefficient) between the aging pit side wall having the inclining slope and the slope. . Of course, the moving wall can be automatically returned to its original position by its own weight at the time of slag dispensing by setting the slope downward at an appropriate angle toward the inside.

In this way, in a state where the slag is stacked for aging, the moving wall is stationary, aging starts through the steam in the slag, and the moving wall responds to the expansion pressure generated at that time. Move on a slope with a slope. For this reason, only the resistance determined by the earth pressure of the slag and the weight of the moving wall is applied to the aging pit side wall, but can be made much smaller than the fixed wall. Then, when the aging-completed slag is dispensed, the moving wall automatically returns to the original position down the slope, so that the slag can be stacked for the next processing.

With respect to the self-weight moving type described above,
An elastic force moving type in which a moving wall is movably opposed to the fixed wall so as to be able to come into contact with and separate from the fixed wall, and at least one elastic body is interposed between the fixed wall and the moving wall. Similarly, in the case of slag, aging starts through steam in the slag, and the moving wall moves in a direction approaching the fixed wall against the elastic force according to the expansion pressure generated at that time, and the slag after aging is completed The movable wall is automatically returned to the original position after being separated from the fixed wall by the elastic force of the elastic body in a state where the pressure is accumulated in accordance with the dispensing.

Further, according to the present invention, since the moving wall is divided into a plurality of parts and arranged continuously in the width direction, it is useful for preventing deformation of the moving wall and ensuring smooth operation. That is, since the expansion of the slag is not uniform due to the circulating condition of the aging steam and the variation of the components of the slag itself, the expansion speed may vary in the length direction of the moving wall. For this reason, when the moving wall has an integral structure, the moving wall, which should originally move in parallel, moves obliquely, deviates from the allowable range of the moving amount, and excessive expansion pressure is applied to the moving wall. May be deformed. According to the results of experiments conducted by the present inventors, it is found that the ratio of the length to the width of the moving wall is preferably 1/2 or more if the length of the moving wall is 1.

On the other hand, the slag discharged after the aging treatment is generally scraped out using a machine such as a shovel from just before the discharge port. Therefore, when the moving wall is integrated, the slag discharging is performed at the center of gravity of the moving wall (the center in the length direction). ), The discharge port side of the moving wall tries to return to the original position while tilting, and the opposite side (backward) is lifted upward, the slag discharge amount exceeds a certain value, and the returning force of the moving wall becomes slag. When the opponent overcomes the resistance, the lifted opposing side suddenly descends. This movement is considered to be more remarkable as the ratio of the length and width of the moving wall increases, and in order to return the moving wall to its original position, the gap between the moving wall guide and the moving wall is increased in consideration of this movement. There is a need. However, when the moving wall divided in the above-described ratio is arranged, the slag can be smoothly returned to the original position sequentially from the front side of the discharge port when the slag is discharged. As described above, whether to divide the moving wall may be determined based on the size (width, depth, height) of the pit, the properties of the slag, and the state of the slag.

According to the present invention, the moving wall has a built-in weight capable of adjusting the weight, and the weight of the moving wall itself can be adjusted to a predetermined value. Since the weight of the moving wall can be arbitrarily adjusted according to the change in the coefficient or the elastic force, it is possible to cause the moving wall to perform stable and reasonable automatic movement. The present invention also provides
A moving wall guide for guiding the moving wall and sliding the moving wall in a predetermined direction is provided on the surface of the aging pit side wall where the moving wall is in sliding contact, so that when the slag is inflated, the moving wall guide is formed. Even when a uniform pressure does not act, the direction can be moved stably and smoothly.

Further, according to the present invention, in the divided type in which the moving wall is divided into a plurality of pieces and connected to each other in the width direction, the outer wall of the moving wall in contact with the steelmaking slag is provided with:
By adopting a configuration in which a seal plate for closing the gap between the connecting portions is additionally provided, it is possible to prevent steam from leaking out of the aging pit and efficiently consume steam for aging. In this case, the seal plate is detachably hooked on the upper part of the corresponding moving wall via a hook-shaped attachment member attached to the upper edge thereof, so that the slag is discharged from the front of the discharge port sequentially. When the moving wall returns to the original position, the deformation of the seal plate accompanying the movement of the moving wall can be absorbed.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 3 show aspects of a steam aging facility according to a first embodiment of the present invention. FIG. 1 is a plan view showing a main structure, and FIG. 2 is a front view seen from the right side of FIG. FIG. 3 and FIG. 3 are side views similarly viewed from the front. 1 to 3, reference numeral 1 denotes a base body of an aging pit. The front side of the aging pit is opened as a loading / unloading section in order to carry in / out slag from the right front side in FIG. A plurality of pits are arranged side by side in a comb-like arrangement.

The foundation main body 1 is made of, for example, plain concrete, and has three aging pit side walls on both left and right sides and an opposite back side with respect to a front loading / unloading section.
Slope 1A consisting of a bottom wall and an inner wall portion of three aging pit side walls having a downward slope toward the inside of the pit.
Is formed. On the other hand, an aging steam source pipe 6 connected to a steam supply device (not shown) and a steam branch pipe 6A branched from the steam source pipe 6 and arranged at an equal pitch are laid on the bottom wall. Have been. Also,
A plurality of rail mounting holes 21 are formed in the base body 1 in the front-rear direction, which is the traveling direction of the seat carriage 5 described later, and the rail mounting 4 mounted in these rail mounting holes 21 is provided. The rail 3 is laid so as to extend in a straight line in the front-rear direction.

In the base body 1, a movable wall 2 is provided on the slope 1A having a U-shaped arrangement forming the inner wall of the aging pit.
The moving wall 2 is provided with a plurality of divided moving wall blocks 2 as shown by hatching in FIG.
A, the movable wall blocks 2A are arranged adjacent to each other in the width direction and are connected to each other.
Are formed, and the moving walls 2 are disposed so as to be movable in a vertical direction with a gradient while sliding on the slope 1A for each moving wall block 2A. Details of the structure of the moving wall 2 will be described later.

Reference numeral 5 denotes an automatic traveling type seat cart. The seat cart 5 is provided across a pair of rails 3 laid on both sides with one aging pit interposed therebetween. The vehicle travels immediately above and below an aging pit surrounded by the three moving walls 2. The seat cart 5 includes a winding drum 7 around which the heat retaining sheet is wound, and a control device (not shown) for rotating the winding drum 7 in conjunction with the running of the seat cart 5. It is installed. The heat retaining sheet wound around the winding drum 7 is made of a heat-resistant vinyl sheet or the like, and has a width sufficiently larger than the lateral width of the aging pit.

FIG. 4 is a sectional view showing the arrangement of the movable wall 2 on the base body 1 in the first embodiment, and FIG. 5 is a sectional view of the movable wall 2 shown in FIG. . 1 to 5, a moving wall block 2A forming a moving wall 2 is made of, for example, a steel plate, and is formed by processing a thick steel plate so as to be able to slide on the slope 1A. A vertical wall which is bent from the lower edge of the inclined bottom wall and extends vertically to be in contact with the layer of the slag 8, and a top wall which is bent from the upper edge of the vertical wall and extends horizontally. Is formed in an angle-type block body having a hollow inside and a deformed trapezoidal cross section.

Each moving wall block 2A having such a structure
The slope 1 is connected in the width direction so that the inclined bottom wall, the vertical wall and the top wall define a continuous plane.
A is arranged on A. Furthermore, each moving wall block 2A
Both left and right end portions of the inclined bottom wall are slidably engaged with a moving wall guide 9 fixed on the inclined surface 1A. The moving wall guide 9 is formed, for example, as a linear rail made of a steel plate, and is fixed on the slope 1A so as to extend in the direction of the gradient, that is, in the vertical direction.
Is guided by the moving wall guide 9 and can slide only vertically. The moving wall block 2A made of a steel plate needs to have a sufficient weight to support the static pressure of the slag 8 deposited in the aging pit, and may have a weight of, for example, about 1.5 t / m. .

The slope 1A of the base body 1 is set in consideration of the automatic return of the moving wall block 2A and the resistance of the moving wall block 2A applied to the base body 1 when setting the slope (the angle of the slope with respect to the horizontal) a. An appropriate value is determined. When the moving wall block 2A is made of a steel plate, the gradient a is preferably in the range of 35 ° to 45 °, in which the coefficient of friction μ between the iron plate of the moving wall block 2A and the iron plate of the slope 1A is max0.8. Considering slipping at 40
It has been clarified that the angle around ° is optimal based on the results of various actual measurements by the present inventors.

The aging process of the slag 8 by the steam aging equipment of the first embodiment having the above-described configuration will be described. The seat carriage 5 is fixed to the rearward limit position shown in FIG. As shown in FIG. 3, it is wound up until the tip reaches the top wall portion of the moving wall block 2A. At this time, the moving wall block 2A is stationary at the position shown in FIG. 3 which has completely descended on the slope 1A due to its own weight. Immediately before the treatment, the slag 8 crushed to a predetermined particle size is sequentially carried into the aging pit from a carry-in / out part by a power shovel or the like, and several hundred tons.
While being piled up in a unit, the upper surface is leveled by appropriate means.

Next, the seat trolley 5 is moved toward the front loading / unloading section, and the front end of the heat retaining sheet 10 is appropriately positioned at the bottom wall of the loading / unloading section close to the left and right moving wall blocks 2A. After being locked by various means, the heat insulating sheet 1
0 is unwound from the winding drum 7 while the seat cart 5
Is run backward. At this time, the heat retaining sheet 1
By synchronizing the feeding speed of 0 and the traveling speed of the seat cart 5, the slag 8 can be covered with the heat retaining sheet 10 that has been fed and developed from the winding drum 7.

When the slag 8 is completely covered with the heat retaining sheet 10 in this way, subsequently, steam is injected from the steam branch pipe 6A. With this steam injection,
As a result of the steam being passed through the slag 8, the aging process of the slag is started. When aging starts, as described above, an inflation pressure is generated in the slag layer, and as a result, each of the moving wall blocks 2A on the left and right sides and the opposing back side is moved by the moving wall guide 9 on the inclined surface 1A. It rises while being guided by. FIG. 10 shows an example of the relationship between the aging elapsed time of the slag 8 and the displacement of the moving wall block 2A. According to this figure, about 40 hours elapse after 48 hours.
It can be seen that mm moves horizontally.

After the aging process is completed, the sheet carrier 5 is run while the heat retaining sheet 10 is wound around the winding drum 7 in the reverse of the above-described operation, and the heat retaining sheet 10 is removed from the slag 8 to perform the processing. Return to the state immediately before. Thereafter, the treated slag 8 is sequentially discharged out of the aging pit from the loading / unloading section by a power shovel or the like to prepare for the next aging. In this case, as the slag 8 is dispensed, each of the moving wall blocks 2A automatically descends and returns to the original position while being guided by the moving wall guide 9 on the inclined surface 1A, and returns to the original position. Can be prepared for slag stacking.

The moving wall block 2A does not move due to the static pressure of the slag 8 accumulated in the pit as described above, and
It is necessary to maintain an appropriate weight so that the slag 8 can move up smoothly with the expansion pressure of the slag 8 during the aging process. This is because various conditions such as the amount of slag carried in and the expansion pressure can be predicted. From the moving wall block 2A
It is, of course, possible to set the specific gravity appropriately. Also,
It is also preferable that the weight of the moving wall block 2A can be adjusted in response to changes in the above-mentioned conditions. In view of such a point, a hollow steel plate as shown in the first embodiment is preferred. In the case of the movable wall block 2A, the weight 11 formed in a granular form is accommodated in the hollow portion of the block as illustrated in FIG. The weight can be maintained at an appropriate predetermined value. Note that the weight 11 is not limited to a granular mass, and various weights having an arbitrary form can be used as long as the weight can be adjusted.

FIG. 6 is a perspective view showing a moving wall 2 of a steam aging apparatus according to a second embodiment of the present invention. FIG. 7 is a cross-sectional view taken along the line indicated by the arrow II in FIG. The second embodiment shown in FIG. 6 is similar to the first embodiment, and corresponding members are denoted by the same reference numerals. A notable configuration in the second embodiment is that a seal plate 12 is attached to the moving wall 2 composed of a plurality of divided moving wall blocks 2A. The seal plate 12 is made of a thin steel plate having a thickness of, for example, about 3.2 mm, and has a substantially outer wall surface on the side in contact with the slag 8 in the movable wall 2 formed by connecting a plurality of movable wall blocks 2A. It consists of a single plate large enough to cover the entire surface.

The seal plate 12 is removably attached to the outer wall surface of the movable wall 2 by, for example, hanging from the movable wall 2, and is provided so as to cover the outer wall surface of the movable wall 2. The seal plate 12 needs to be formed on the plate body with a material having heat resistance and airtightness, and is used to prevent steam leakage during the aging process. As shown in FIG. 6, when the moving wall 2 has a structure in which the moving wall block 2A is connected, a gap G is formed in the connecting portion of the block, and there is a possibility that steam may leak out of the pit from the gap G. Therefore, the gap G is closed by the seal plate 12 to prevent steam leakage. In the embodiment shown in FIG. 6, a plate mounting member 13 made of, for example, a U-shaped bent bar is dispersed and fixed to the upper edge portion of the seal plate 12 at an appropriate pitch, while each moving wall block 2 is fixed.
A mounting hole 1 is formed on the top wall of
4 are provided, and each plate mounting member 13 is engaged with the mounting hole 14 so that the seal plate 12 is mounted in a suspended state.

Usually, when the aging pit is discharged from the slag 8, the moving wall block 2
The moving wall 2 is not flush because A returns by its own weight, but if the sealing plate 12 is supported in a suspended state as described above, the moving wall 2
This mounting structure is a preferred embodiment because it has a good follow-up property with respect to the deformation accompanying the movement of and can exhibit the deformation absorbing function stably.

FIGS. 8 and 9 show a moving wall 2 of a steam aging facility according to a third embodiment of the present invention in plan and side views. The third embodiment shown in FIGS.
The third and third embodiments are characterized in that the first and second embodiments use a moving wall moving system using their own weight, whereas the first and second embodiments use a moving wall moving system using an elastic force. Is a fixed wall 1 standing upright on the base body 1 of the aging pit
A moving wall 2 comprising a plurality of moving wall blocks 2A is provided on the fixed wall 15 so as to be capable of moving in parallel so as to be able to approach and separate from each other inside the pit. It has a basic structure in which an elastic body 16 is interposed therebetween.

8 and 9, the fixed wall 15 has a cylindrical spring case 17 whose front end portion is widened in a trumpet shape.
A plurality of steps are mounted and project horizontally forward. On the other hand, a moving wall block 2A made of a steel plate which is disposed upright in front of the fixed wall 15 has a spring holding member 1 made of a round bar.
A total of four 9 are mounted on the rear side of the wall, two in the upper and lower stages, two in each stage, projecting horizontally rearward so as to be freely fitted to the spring case 17, and further realized by a coiled spring. The elastic bodies 16 are fitted on the spring holding members 19, respectively. The spring 16 is elastically interposed between the rear surface of the moving wall 2 and the flared opening of the spring case 17, and moves the spring pressure in opposition to the expansion pressure of the slag. It is provided so as to act on the wall block 2A.

In the third embodiment, the movable wall block 2A is fixedly held at an initial position separated from the fixed wall 15 by the elasticity of the spring 16 over the static pressure of the slag layer in the pit. On the other hand, during the slag aging process, the moving wall block 2A moves in parallel in the direction approaching the fixed wall 15 because the slag expansion pressure exceeds the elasticity of the spring 16. When the inflation pressure is removed and the slag is dispensed, the movable wall block 2A is automatically returned to the initial position by the elasticity of the spring 16. Although this embodiment is different in that the spring elasticity is used, the moving mode of the moving wall 2 is the same as the moving wall moving method using its own weight.

FIG. 11 shows the relationship between the expansion pressure of the slag and the restraint rate in the case of the spring type. The more the expansion of the slag is restrained due to aging, the more the pressure applied to the wall becomes extremely large. The graph is shown. Here, the line a is an experimental value (bench test) using a model pit smaller than the actual machine, and the line b plots the most contracted value and the load at that time among the springs installed at different locations ( The maximum value of the spring test), and the line C indicates the average value of the spring (the average value of the spring test). The spring absorbs the inflation pressure depending on the location of the spring, and the spring mounted on the upper side of the moving wall generally absorbs the inflation pressure, that is, contracts well. On the other hand, the spring mounted on the lower side does not absorb well (it is considered that the friction between the moving wall and the fixed wall has an influence). Therefore, it is preferable that the specification of the spring be determined based on the relationship between the displacement amount due to the wire b and the inflation pressure in the sense of taking a safe side.

In FIG. 11, the region S1 shows a spring that contracts well against the inflation pressure, the deflection (δ) of the spring increases, and the absorption of the inflation pressure increases. However, the size itself tends to be long, and this is a range that is not suitable for practical use in terms of scale and cost. On the other hand, in the area S2, a spring that does not contract much against the inflation pressure is shown, the deflection (δ) of the spring is reduced, and the spring itself absorbs the inflation pressure. To that extent, a large load is applied to the pit wall itself, and cracks and the like are likely to occur in the pit wall, which is also unsuitable for practical use. Considering these points, the area S3
It is preferable to determine the spring specifications in the area of, that is, in the vicinity of the maximum curvature of the curve, in terms of scale and cost.

Although the present invention has been described in detail based on the above embodiments, the present invention is not limited to the sealing plate 1 of the moving wall moving type using elastic force.
2 may be provided as in the first and second embodiments, and the elastic body is not limited to a spring, and the same function can be obtained by using a hydraulic cylinder or a pneumatic cylinder instead. It goes without saying that these modifications can also be exerted, and these modifications are also included in the scope of the present invention. Further, the present invention, in addition to having a structure in which the entire moving wall is made of steel plate, the whole is made of concrete, or the surface that comes into contact with the slag and the surface that comes into mechanical sliding contact are made of steel plate, The main body can of course be made of concrete, and is not limited to the structure of the embodiment.

[0039]

According to the present invention having the above-described structure and operation, the structure provided with the moving wall of the automatic movement / return type can easily absorb the expansion pressure due to the aging of the slag. From this point, the construction of the pit foundation is simple and the cost can be reduced. Further, since the operation is automatically restored, there is no need to adjust the position of the wall during operation, and the workability is good. In addition, by providing the moving wall guide, even when pressure is not uniformly applied to the wall surface of the moving wall when the slag is inflated, the moving wall guide moves in a predetermined direction, so that the movement is performed smoothly and stably, and the expansion pressure is increased. Absorption is ensured.

Also, according to the present invention, since the moving wall is divided into a plurality of parts, the moving wall can be automatically returned sequentially following the moving wall from the discharge side when the slag is discharged. Can be prevented and a stable aging treatment function can be exhibited over a long period of time. Furthermore, by adopting a configuration in which a seal plate is added, steam is prevented from leaking to the outside and is efficiently consumed for aging, thereby reducing processing costs and reducing the variation in quality of slag after aging. it can.

[Brief description of the drawings]

FIG. 1 is a plan view of a steam aging facility according to a first embodiment of the present invention.

FIG. 2 is a front view seen from the right side of FIG.

FIG. 3 is a side view as viewed from the front with respect to FIG. 1;

FIG. 4 is a sectional view showing an arrangement state of the moving wall 2 in the first embodiment shown in FIG. 1;

5 is a sectional view of the moving wall 2 shown in FIG.

FIG. 6 is a perspective view of a moving wall 2 of a steam aging facility according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view taken along the line indicated by the arrow II in FIG.

FIG. 8 is a plan view of a moving wall 2 of a steam aging facility according to a third embodiment of the present invention.

FIG. 9 is a side view of the third embodiment shown in FIG. 8;

FIG. 10 is a temporal diagram of a moving wall block displacement amount during slag aging processing.

FIG. 11 is a graph showing the relationship between the expansion pressure of the slag and the constraint rate.

FIG. 12 is a time-dependent diagram of slag expansion pressure applied to a concrete pit wall.

FIG. 13 is a perspective view of a conventional steam aging facility for steelmaking slag.

[Explanation of symbols]

1 ... basic body, 1A ... slope, 2 ...
Moving wall, 2A ... Moving wall block, 3 ... Rail, 4 ... Rail stand, 5 ... Seat truck, 6 ... Steam source piping, 6A ... Steam branch piping, 7 ...
Winding drum, 8 ... steelmaking slag,
9: Moving wall guide, 10: Heat insulation sheet,
11 ... weight, 12 ... seal plate,
13: plate mounting member, 14: mounting hole,
15: fixed wall, 16: elastic body,
17 ... spring case, 18 ... mounting frame,
19 ... Spring holding member.

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hitoshi Miyatani 1 Kanazawacho, Kakogawa City, Hyogo Prefecture Inside the Kobe Steel Works Kakogawa Works (72) Inventor Kazuo Kamei 1 Kanazawacho, Kakogawa City, Hyogo Prefecture Kobe Steel Ltd. Inside Kakogawa Works (72) Inventor Yuji Motoyama 1 Kanazawacho, Kakogawa City, Hyogo Prefecture Inside Kobe Steel Works Kakogawa Works (72) Inventor Kazuto Kuramoto 1 Kanazawacho, Kakogawa City, Hyogo Prefecture Kobe Works Kakogawa Works (58) Field surveyed (Int. Cl. ⁷ , DB name) C04B 5/00 C21C 5/28

Claims (10)

(57) [Claims] 1. An aging pit of a steam aging facility for steam aging slag of steelmaking slag or electric furnace slag in the atmosphere by supplying steam from below, wherein a moving wall is provided on a side wall of the aging pit. Moves in accordance with the expansion pressure of the slag together with the start of the steam aging process, and after the steam aging process is completed, is formed so as to be self-returning to the initial position before the movement as the slag is discharged. An aging pit for steam aging equipment, which is characterized in that: 2. The aging pit of the steam aging equipment according to claim 1, wherein a surface portion of the aging pit side wall on which the moving wall slides is formed on a slope having a downward slope toward the inside of the pit. 3. A fixed wall is provided on a side wall of the aging pit, while a movable wall is provided movably opposed to the fixed wall so as to be able to come into contact with and separate from the fixed wall, and between the fixed wall and the movable wall. The aging pit of the steam aging equipment according to claim 1, wherein at least one elastic body is interposed. 4. The aging pit of a steam aging facility according to claim 2, wherein the moving wall provided on the side wall of the aging pit is divided into a plurality of pieces and arranged so as to be connected in the width direction. 5. The aging pit of the steam aging equipment according to claim 2, wherein the moving wall has a built-in weight capable of adjusting a weight, and the weight of the moving wall itself can be adjusted to a predetermined value. 6. The aging pit of the steam aging equipment according to claim 3, wherein the elastic body is a spring. 7. The steam according to claim 2, wherein a moving wall guide for guiding the moving wall and sliding the moving wall in a predetermined direction is provided on a surface of the aging pit side wall where the moving wall slides. Aging pit of aging equipment. 8. The aging pit of a steam aging facility according to claim 4, wherein a seal plate for closing a gap between the connecting portions is provided on an outer wall surface of the moving wall that contacts the steelmaking slag. 9. The aging pit of the steam aging equipment according to claim 7, wherein the aging pit side wall, the moving wall, and the moving wall guide are made of steel at least in a surface portion in sliding contact and a surface portion in contact with the steelmaking slag. 10. The steam aging equipment according to claim 8, wherein said seal plate is detachably hung on an upper portion of a corresponding moving wall via a hook-shaped attachment member attached to an upper edge portion thereof. Aging pit.