JPH11269528A - Assembling type core for executing work of pouring refractory to lining of torpedo car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembling type core for executing the work of pouring refractory to the lining of a torpedo car, by which an excellent working precision can be obtained the removing work of the core can be executed safely in a short time after curing the pouring refractory. SOLUTION: The core 2 is divided into sectionally split-type plural pieces of panels 2A-2F in the X-direction, and further, each of the divided panels 2A-2F is divided into plural pieces of units 2B1-2B8, 2D1-2D8, or the like in the circumferential direction. At least one piece unit 2D1 in the plural pieces of units 2B1-2B8, 2D1-2D8, or the like has a draft TX arranged on the both side surface thickness parts in the X-direction and extended over both sides in the X-direction to the inner part direction of the torpedo car and a draft TL arranged at both edge in the circumferential direction and extended over both sides in the circumferential direction to the inner part direction of the torpedo car.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core for construction of a cast refractory for lining a mixed iron car, and in particular, it is possible to efficiently remove a core from a core after casting in a short time. In addition, the present invention relates to an assembling core for construction of a refractory that is to be poured into a mixed iron car and that can ensure the safety of a deframing operation.

[0002]

2. Description of the Related Art In a steel process, a mixed iron wheel is used to transport hot metal from a blast furnace to a converter. In addition, mixed iron wheels have been used for more than ten years for pretreatment for removing impurities such as silicon, sulfur and phosphorus from hot metal.

On the other hand, the lining of a mixed-iron car is usually constructed by stacking refractory bricks. However, in order to cope with the shortage of skilled bricklayers in recent years and to save construction costs, the use of cast refractories as a substitute for bricks is being studied. Conventionally, cast refractories have been used in ladles and blast furnace tapping gutters, contributing to cost savings and achieving mechanization and automation.

On the other hand, in the case of a refractory for lining a mixed iron car, the cast refractory is difficult to construct as compared with the case of a ladle or the like. On the other hand, it has not been widely used because of insufficient durability. In particular, in order to cast into a mixed iron car, it is necessary to carry the core as a form from the receiving port of the mixed iron car and assemble it inside the mixed iron car, which hinders the efficiency of construction work. I have.

[0005] As for the core for pouring refractories as a refractory for lining a mixed iron car, a stretchable core infused with a fluid (Japanese Patent Publication No. 3-69964) or a longitudinal axis in the mixed iron car is used. (Japanese Patent Application Laid-Open No. 6-108135) has been proposed in which a split panel is mounted on the basis of a shaft installed in a core. However, in the former, the core is flexible,
The position of the core cannot be fixed sufficiently, and there is a problem in construction accuracy.

In the latter, since the core is positioned with reference to both ends of the long shaft, in order to secure construction accuracy, it is necessary to fix the shaft due to the earth pressure of the irregular refractory at the time of casting. It is necessary to suppress bending as much as possible. However, in order to minimize the deflection of the shaft, a support structure that supports the shaft at a predetermined position with respect to an external reference point is required, and the positional relationship between the support structure and the shaft is precisely adjusted to a predetermined relationship. It is not easy to assemble a heavy structure that requires such strength and further requires such strength in a narrow mixed-iron car, and it is not always a satisfactory method in terms of construction accuracy and labor saving.

[0007] In addition, when the refractory for lining a mixed-iron car is changed from a brick to a refractory, the design of the mixed-iron car needs to be changed due to the insertion of a core supporting structure, and a remodeling cost is required. It is. As described above, casting refractories as an irregular-shaped refractory for lining mixed iron cars, constructing and repairing cores and their attached structures, the core is kept in a precise positional relationship with the inner wall of the mixed iron cars, In fact, there is no core that can be assembled and removed efficiently and its accompanying structures.

[0008]

In view of the above situation,
The present invention is an assembling core for construction of a cast iron refractory for lining a mixed iron car, which is excellent in construction accuracy and can efficiently and safely perform a core deframing work after pouring refractory curing. The purpose is to provide.

[0009]

According to a first aspect of the present invention, a sectional shape defined by an outer periphery which is circular in a cross section perpendicular to the X direction which is the direction of the rotation axis of the pig iron wheel and an inner periphery facing the working space inside the pig iron wheel is provided. Assembled core 2 for construction of cast refractories
And the core 2 is divided into a plurality of panels 2A to 2F in a ring-shape in the X direction.
Each of ~ 2F has multiple units in the circumferential direction
2A1-2A8, 2B1-2B8, 2C1-2C8, 2D1-2D8, 2E1-2E8,
Divided into 2F1 ~ 2F8 and the plurality of units
2A1-2A8, 2B1-2B8, 2C1-2C8, 2D1-2D8, 2E1-2E8,
At least one unit 2D1 of 2F1 to 2F8 is provided on the side thickness portions on both sides in the X direction, and a draft taper TX extending on both sides in the X direction with respect to the inside of the mixed iron wheel, and both circumferential edges. And a draft taper TL that is provided on both sides in the circumferential direction with respect to the inner direction of the mixed iron vehicle.

A second aspect of the present invention is to provide an X
A castable refractory construction type core 2 having a cross-sectional shape determined by an outer periphery which is circular in a cross section perpendicular to the direction and an inner periphery opposed to the internal working space of the mixed iron wheel, wherein the core 2 is X Panel 2A ~ 2F
Each of the divided panels 2A to 2F is divided into a plurality of units 2A1 to 2A8, 2B1 in the circumferential direction.
~ 2B8, 2C1 ~ 2C8, 2D1 ~ 2D8, 2E1 ~ 2E8, 2F1 ~ 2F8, and at least one of the ring-shaped divided panels 2D, each of the plurality of units 2D1 ~ 2D8 in the X direction Draft taper TX on both sides in the thickness direction.
And at least one of the plurality of units 2D1 to 2D8 is provided at both circumferential edges thereof, and has a tapered taper extending on both sides in the circumferential direction with respect to the inside of the mixed iron wheel.
This is an assembly type core for construction of refractories poured into a mixed iron car with TL.

A third aspect of the present invention is directed to the X-axis of the
A castable refractory construction type core 2 having a cross-sectional shape determined by an outer periphery which is circular in a cross section perpendicular to the direction and an inner periphery opposed to the internal working space of the mixed iron wheel, wherein the core 2 is X Panel 2A ~ 2F
Each of the divided panels 2A to 2F is divided into a plurality of units 2A1 to 2A8, 2B1 in the circumferential direction.
~ 2B8, 2C1 ~ 2C8, 2D1 ~ 2D8, 2E1 ~ 2E8, 2F1 ~ 2F8, and at least one of the ring-shaped divided panels 2A ~ 2F 2D, a plurality of units 2D1 ~ 2D8
Each has a taper TX provided on the side thickness portions on both sides in the X direction and extending on both sides in the X direction with respect to the inside direction of the mixed iron wheel, and further, the ring-shaped divided panels 2A to 2F
In each of the plurality of units 2A1 to 2A8,
2B1-2B8, 2C1-2C8, 2D1-2D8, 2E1-2E8, 2F1-2F8
Characterized in that at least one of the units 2A1 to 2F1 has a draft taper TL provided on both circumferential edges and extending on both sides in the circumferential direction with respect to the inside direction of the mixed iron car. It is a prefabricated core for construction of cast refractories.

In the first, second or third invention described above, the units 2A1-2A8, 2B1-2B8, 2C1-2C8, 2D1-2D8, 2D divided in the circumferential direction are provided.
It is preferable to have a rotating shaft type connecting member 6 for connecting adjacent units in the circumferential direction and serving as a rotating shaft for removing the units at circumferential edges of E1 to 2E8 and 2F1 to 2F8.

In the first, second or third invention, the units 2A1 to 2A8, 2B1 to 2B8, 2C1 to 2C8, 2D1 to 2C are divided in the circumferential direction.
2D8, 2E1 to 2E8, 2F1 to 2F8, at least one unit has a connection member 8 for connection with a load point of a lever for pulling out the unit, and at least one other unit has a lever fulcrum. It is preferable to have a supporting and fixing member 9 for supporting and fixing.

In the first, second or third aspect of the present invention, the number of divisions of the core in the X direction, that is, the number of the above-mentioned ring-shaped division panels may be plural, and the number of divisions is limited. Although not required, it is preferable that the number is three or more in order to reduce the unit weight and to enable assembling by hand. In the first, second or third invention, the number of divisions in the circumferential direction of the ring-shaped divided panel, that is, the unit whose outer periphery is on the same circle when the core is assembled. The total number of is not limited as long as it is plural, but is preferably three or more in order to reduce the unit weight as described above.

Further, the number of divisions in the circumferential direction of the above-mentioned ring-shaped divided panel can be arbitrarily set in each of the above-mentioned plurality of ring-shaped divided panels independently of the other ring-shaped divided panels. .

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. The present invention relates to an assembly type core for construction of a cast refractory which covers an inner wall of a mixed iron car with a gap for filling the cast refractory therebetween. The present inventors have conducted intensive studies in order to solve the above-mentioned problems of the prior art. As a result, [1] the core is of an assembled type divided into the rotating shaft of the mixed iron wheel and the circumferential direction, [2]
The present invention has been found that the man-hours for removing the core can be reduced by providing the divided unit with the tapping taper in the rotating shaft of the mixed iron wheel and the taper in the circumferential direction.

That is, in order to achieve the above-mentioned object of the present invention, it is preferable that the assembly type core for construction of a refractory poured into a mixed iron car according to the present invention has the following constitutions (1) to (4). (1): The core is divided and assembled. In order to achieve the object of the present invention, it is preferable that the construction core of the cast refractory for lining a mixed iron car is a separately assembled core divided into units of dimensions and weight that can be carried by human power.

The inside of the piggyback car is narrow for carrying in the machine, and a system in which a large machine arm is brought in from the outside of the piggyback car is conceivable. However, the equipment cost is excessively increased, and it is difficult to employ it industrially. Further, a precision machine is required to mechanically assemble the core with high accuracy, and in this case, it is difficult to employ industrially in terms of machine maintenance and equipment cost.

Therefore, as a practical method, a method of assembling the core by hand is simple and economical. In order to easily realize this manual operation, a split-assembled core is used in the present invention. (2): The core division method is as follows.

The core is divided into a plurality of panels in a ring-shape in the direction of the rotation axis of the pig iron wheel (= longitudinal direction of the pig iron wheel) (hereinafter also referred to as the X direction). Also referred to as a ring-shaped split panel). Each of the above-mentioned ring-shaped divided panels is further divided into a plurality of units in a circumferential direction (hereinafter also referred to as an L direction).

The above-mentioned divided unit, which is the final basic unit of the divided core, is hereinafter referred to as a divided unit or simply a unit. (3) The following X-direction tapers TX and L-direction tapers TL are provided in the above-mentioned ring-shaped divided panel and divided units (= units). [X-direction extraction taper] -1: a case in which at least one of the plurality of units is provided with the X-direction extraction taper; at least one of the plurality of all units divided in the X direction and the L direction This unit is formed into a unit shape having a draft taper (hereinafter also referred to as an X-direction draft taper) that extends to both sides in the X direction with respect to the inside direction of the mixed iron wheel, on the side surface thickness portions on both sides in the X direction of the unit.

-2: A case in which at least one of the ring-shaped divided panels is provided with a taper in the X-direction over the entire circumference of the ring-shaped divided panel; An X-direction taper is provided around the circumference. In other words, one set of units in the X direction in the X direction, that is, one set of units whose outer circumferences are on the same circle when assembled (hereinafter also referred to as one set in the ring direction) are assembled on both sides in the X direction in the assembled state. Is formed into a unit shape having a draft taper (X-direction draft taper) that extends to both sides in the X direction with respect to the inside direction of the pig iron wheel.

That is, at least one of the divided panels is spread over the entire periphery of the divided section, on both sides in the X direction of the divided panels, on both sides in the X direction with respect to the inside direction of the mixed iron wheel. Draft taper (X direction taper)
And a unit shape having The above-described X-direction extraction taper is preferably provided on at least one of the X-direction ring-shaped divided panels whose opposing inner walls of the mixed iron wheel are cylindrical.

Further, if the core is divided into three or more slices at the position in the X direction corresponding to the inner wall of the cylindrical mixed iron wheel, the above-described taper in the X direction is formed by the above-described taper at the substantially central portion in the X direction. More preferably, it is provided for each set of units. [L-direction taper] -1: A case in which at least one of a plurality of units has an L-direction taper; This case is further divided into the following two cases (A) and (B). .

-1 (A); A unit identical to the unit provided with the above-mentioned −1 taper in the X direction is provided on both edges in the circumferential direction (L direction) with respect to the inner direction of the mixed iron wheel. A unit shape having a draft taper (hereinafter, also referred to as an L-direction draft taper) spreading on both sides in the direction is used.

-1 (B): At least one of the plurality of units having the X-direction taper of -2 is provided with the above-described L-direction taper. -2: a case where at least one of the plurality of units is provided with an L-direction draft taper in each of the ring-shaped divided panels; A unit shape in which each unit has, at both edges in the circumferential direction (L direction), a draft taper (hereinafter also referred to as an L direction draft taper) that spreads to both sides in the circumferential direction with respect to the inside of the mixed iron wheel. And

Tables 1 to 3 show the core dividing method and the taper forming state of the core unit (= unit) described in detail above, taking the example of the present invention shown in FIG. 1 described later as an example. Table 1
This is an example of the first invention, and corresponds to -1 (A) described above. Table 2 is an example relating to the second invention, and corresponds to -1 (B) described above. Table 3 is an example relating to the third invention and corresponds to -2 described above.

[0028]

[Table 1]

[0029]

[Table 2]

[0030]

[Table 3]

(4) The unit is provided with the following member for pulling out the unit. [Unit connecting member] A rotating shaft type connecting member which connects adjacent units in the circumferential direction and serves as a rotating shaft for removing the unit is provided at the circumferential edge of the unit. [Lever connection member, support / fixing member] At least one unit is provided with a connection member with a load point of the lever for pulling out the unit, and at least one other member is provided.
Each unit is provided with a supporting / fixing member for supporting and fixing a fulcrum of the lever.

As the material of the core, a wooden material such as plywood, a metal material such as steel or aluminum, a glass fiber reinforced plastic material, or the like can be used. In the present invention, the material of the core is not limited. . Below, according to the drawings,
[1] Core dividing method and core structure in the present invention,
[2] How to install the refractory, and [3] How to remove the core will be explained in this order.

[1]: Method of dividing core and structure of core FIG. 1 shows an example of a method of dividing a core and a structure of an assembly type core for construction of a cast refractory according to the present invention. ) And FIG. (A) as viewed in the direction of arrows Y ₁ -Y ₁ (b) and Y ₂ -Y _{2 as} viewed in the direction of arrows (c). The core division method and the taper formation state of the core unit (= unit) shown in FIG. 1 are as shown in Table 3 described above.

In FIG. 1, 1 is a mixed iron wheel, 2 is a core, 2
A, 2B, 2C, 2D, 2E, 2F are ring-shaped split panels, 2B1, 2B2, 2B
3,2B4,2B5,2B6,2B7,2B8,2D1,2D2,2D3,2D4,2D5,2D6,2D
7, 2D8 is the unit of the ring-shaped split panel (the minimum division unit of the core), 2M is the core for the furnace opening, 2M1 and 2M2 are the cores for the furnace opening, 3 is the iron shell, 4 is the mixed iron furnace The mouths, 5a and 5b are the plates of the core mirror wall, the X direction is the rotation direction of the mixed iron wheel (= longitudinal direction of the mixed iron wheel), the L direction is the circumferential direction of the core (the circumferential direction of the mixed iron wheel),
TX ₁ and TX ₂ are the taper in the X direction of the unit, TX is the taper in the X direction, TL ₁ and TL ₂ are the taper in the L direction of the unit, TL is the taper in the L direction, and V ₁ is the gap for pouring refractories. , V ₂ shows the torpedo car interior work space during construction pouring.

Further, t represents a thickness of a cross-section of the core having a cross-sectional shape determined by the outer periphery and the torpedo car internal working space V ₂ in the periphery facing is circular in cross section perpendicular to the X direction. The core according to the present invention may have any shape as long as the outer periphery of the core in a cross section perpendicular to the X direction is circular, and the inner peripheral surface may have an irregular shape such as with projections and irregularities. May be uneven or irregular in location, and can be arbitrarily designed.

The core 2 illustrated in FIG. 1 has a cylindrical panel having an outer surface corresponding to the shape of the inner wall of the mixed iron wheel 1, and an outer surface connected to both sides of the cylindrical panel having a truncated top. And a disc-shaped plate perpendicular to the X direction connected to the top side of the partially conical panel portion. The core 2 illustrated in FIG. 1 is used in combination with a core 2M for a furnace opening for adjusting the shape of the furnace opening.

It is preferable that the core 2M for the furnace opening is also divided into two or more to facilitate removal. These two
The seed core can also be integrated. FIG.
In the case of the core 2 exemplified in (1), the number of cores divided in the X direction and the L direction, that is, the number of division units (units), which is the final division unit of the core, is 6 × 8 = 48.

That is, the core 2 of FIG. 1 is composed of 48 cores (2Ai, 2Bi, 2Ci, 2Di, 2Ei, 2Fi) (i = 1 to 8) and plates 5a and 5b of the core mirror wall. Have been. The core division method is preferably a simple division method. In this case, assembly can be performed by a simple method. For this reason, the division method divides the wheel slice in the direction of the rotating shaft of the mixed iron wheel (X direction), and further divides each of the wheel slices in the circumferential direction (L direction).

By adopting such a dividing method, when the core is disassembled after the cast refractory is constructed, after removing some units in the X direction or the L direction, each unit is moved in the X direction or in the X direction. The force against the L direction can be easily reduced, and the core can be easily disassembled and collected. In order to facilitate the disassembly work, it is necessary to reduce the force that each split unit collides with. For this reason, when disassembling the assembled core, first, in order to reduce the stress in the X direction, It is preferred to remove one set of single slices.

As one set of the slices to be removed first, X can be used because the stress can be reduced over a wide range.
It is preferred to select one set of one slice at approximately the center in the direction. The core of the present invention further comprises at least one unit (2D1) of all units (2A1 to 2F8).
On the side of both sides in the X direction
A draft taper (X-direction draft taper) TX extending on both sides in the direction is provided (first invention).

The core of the present invention is the same as that shown in FIG.
As shown in FIG. 3, each unit (2D1, 2D2, 2D) of a set of slices in the X direction, preferably substantially at the center,
3,2D4,2D5,2D6,2D7,2D8) on both sides in the X direction,
It is preferable that a draft taper (X-direction draft taper) TX extending on both sides in the X direction with respect to the inside direction of the mixed iron wheel is provided (second invention, third invention).

This is because, when the core is assembled, stress is applied to the units in the X direction, and the units are easily pulled out. Further, as shown in FIG. 1 (b), the core of the present invention comprises a set of slices, which are sliced panels (2A, 2B, 2C, 2D, 2E, 2F) in the X direction. In at least one set, at least one unit (2D1) is provided on both circumferential edges.
An extraction taper (L-direction extraction taper) TL is provided on both sides in the circumferential direction with respect to the internal direction of the mixed iron wheel (first invention, second invention).

Further, the core of the present invention is the same as that of FIG.
As illustrated in (b) and (c), at least one unit (2A1) is provided in each of a set of slices, which is a sliced panel (2A, 2B, 2C, 2D, 2E, 2F) in the X direction. , 2B
1,2C1,2D1,2E1,2F1) are provided at both circumferential edges with a draft taper (L-direction draft taper) TL that extends to both sides in the circumferential direction with respect to the inside of the mixed iron wheel. That
More preferred (third invention).

This is because, although the X-direction squeezing taper can alleviate the force of pushing in the X direction,
This is because the stress still remains in the direction and it is not easy to pull out the unit. In the L direction, if only one unit is removed, the stress can be relieved. Therefore, at least one set of one set of slices, which is a sliced panel in the X direction,
Alternatively, in each set, the L-direction taper TL may be provided only in one unit, but may be provided in two or more units.

Further, in the present invention, as shown in FIG. 2, adjacent units in the circumferential direction (L direction) are connected to circumferential edges of the units divided in the circumferential direction. Rotating shaft type connecting member 6 for assembling and disassembling the unit, which serves as the rotating shaft for detaching the unit
Is preferably provided. By providing the rotating shaft type connecting member (hereinafter also referred to as a connecting member) 6, it is possible to eliminate the unsafety that the unit jumps out or drops with excessive force at the time of the unit extracting operation.

Furthermore, by lifting the opposite side with the connecting member 6 on one side as a fulcrum, the unit can be easily pulled out by applying a lever. The connection member 6 is unnecessary after the unit pull-out operation is completed, and therefore, it is preferable that the connection member 6 be configured to be removable. The connecting member 6 opens a hole in each unit, overlaps the holes,
It can be easily manufactured by passing a bolt or the like through it, but the more specific configuration is not limited.

Further, in the present invention, it is preferable to use a lever for pulling out a unit with an adjacent unit such as an adjacent unit serving as a fulcrum so that the unit can be easily pulled out by human power. That is, for example, as shown in FIG. 2, at least one of the units has a load point 7a of the lever 7 for pulling out the unit and a connecting member 8 for connecting the unit, and at least one other unit. However, it is preferable to have a supporting and fixing member 9 for supporting and fixing the fulcrum 7b of the lever.

In this case, it is preferable to pull out the supporting / fixing member 9 provided in the unit adjacent in the L direction as a load supporting point. In FIG. 2, reference numeral 7c denotes a connecting member between the load point 7a and the connecting member 8. The configuration of the connection member 8 is not limited as long as the connection member 7c can be attached to the connection member 7c.

Each of the above-mentioned lever members may have a structure fixed to the unit or a structure capable of being attached and detached. As described above, the method of dividing the core and the structure of the core according to the present invention have been described. Hereinafter, a preferred example of the method for constructing a cast refractory using the core according to the present invention will be described.

[2]: Construction method of cast refractory FIG. 3 is a schematic sectional view showing the layer structure of the wall surface of the mixed iron wheel after construction of the cast refractory according to the present invention and before deframing work. In FIG. 3, 2 is a core, 3 is an iron shell, 10 is a casting material (: cast refractory), 11 is a backup material, 12 is an anchor, and 13 is an anchor holder.

First, the anchor 12 is fixed to the steel shell 3 using the anchor holder 13. With this anchor 12,
It is a reference for fixing the core 2 during the construction of the cast refractory, so that the cast refractory after construction can be supported on the steel shell 3. As the anchor 12, any refractory having the same level of durability as the cast refractory to be constructed can be used, and a precast product of a cast material, a brick for a mixed iron wheel and the like can be preferably used.

Next, a back-up material 11 such as a spray material, a stamp material or a brick is lined on the inner surface of the steel shell 3.
This lining serves as a protective material for the steel skin when the cast refractory applied further inside slides down or cracks for some reason and loses its function as a container lining.

It is preferable to partially use permanent bricks having an anchor structure in order to reinforce the support of a cast refractory to be constructed in a later step. The above-mentioned backup materials such as the spray material, the stamp material, and the brick can be used alone or in an overlapping manner. Next, after assembling the core 2 inside the pig iron wheel 1 using the units 2Ai to 2Fi with the anchor 12 as a reference, the divided cores 2M1 and 2M2 for the furnace opening are assembled into the furnace opening and poured. Install refractories.

As the cast refractory, known alumina, silicon carbide, carbon, spinel, magnesia and the like can be used alone or in a mixture, but the material of the cast refractory is not particularly limited. As a pouring method, using a mortar mixer or the like, water is added to the above-exemplified material, and then mixed and then pumped by a squeeze pump or the like. We perform pouring construction from.

Further, it is also possible to simply drop from a high place only by its own weight and carry out construction. After installation, leave it for about 1 to 100 hours to cure the refractory. Next, after confirming the completion of hardening, the core is disassembled, removed, and taken out of the mixed iron wheel by the above-described construction method and the following core removal method. [3]: Method of Removing (Removing the Core) The method of removing the core will be described below with reference to FIGS. 1 and 2 which are examples of the present invention described above.

The removal operation of the core 2 is performed by entering the inside of the mixed iron wheel 1 and a set of one section (2D1, 2D2, 2D3, 2D4, 2D5,
2D6,2D7,2D8), that is, X
It starts from the ring-shaped divided panel 2D provided with the direction-cutting taper TX. In this case, the removal is started from the unit 2D1 provided with the L-direction extraction taper TL at both circumferential edges.

After removing the unit 2D1, 2D2 to 2D8
Is removed, and the frame removal of the ring-shaped split panel 2D is completed.
The work described above can be easily performed within an accessible range by appropriately rotating the mixed iron wheel 1. Further, it is preferable that the pull-out operation is performed by the lever 7 using the connecting member 8 and the supporting / fixing member 9 provided in the unit.

According to the present invention, the drawing taper does not require a large force for drawing. Next, the process proceeds to the operation of removing the frame of the adjacent ring-shaped divided panel 2C or 2E. In the case of the core shown in FIG. 1, since the L-direction extraction taper TL is provided in each unit of the ring-shaped divided panel, the extraction operation can be easily performed.

After one unit is pulled out, the stress can be relieved and the other units can be easily pulled out. Further, according to a preferred aspect of the present invention, in this pulling-out operation, a rotating shaft type connecting member 6 for assembling / disassembling which connects adjacent units in the circumferential direction and serves as a rotating shaft for removing the unit is used. Thereby, the extraction operation can be performed more safely and efficiently.

Further, according to the preferred embodiment of the present invention, a lever 7 for pulling out a unit with a fulcrum of an adjacent unit such as an adjacent unit as a fulcrum can be used for each of these units. Can perform pull-out work. Finally, the core for the furnace opening is divided into two parts, and the core is removed outside the furnace using a crane. After disassembling the core by the above-mentioned construction method, removing it, and taking it out of the mixed iron wheel, a large amount of added moisture remains in the material immediately after curing,
The cast refractory material is heated and dried to remove the water,
Completed the entire construction process for irregular refractories for lining.

The drying step is carried out by, for example, carrying a burner into the mixed iron wheel 1 and heating the refractory material, and usually requires about 5 to 100 hours. It is preferable that drying is performed for a long time to prevent material defects, but it is preferable that drying be performed in a short time from an economic viewpoint. that's all,
The configuration, preferred embodiment, operation, and effect of the present invention have been described.

[0062]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction, operation and effects of the present invention will be specifically described below based on embodiments. (Embodiment) In this embodiment, the above-described core structure of the present invention shown in FIG. 1 was used to form the layer structure shown in FIG. 3 on the inner wall of a mixed iron car having an iron receiving capacity of 250 t.

That is, first, an anchor 12 made of a precast cast material is made of stainless steel,
It was inserted into the anchor holder 13 welded to the steel shell 3 and fixed. Similarly, after a predetermined number of anchors were fixed to the steel shell 3, a brick for permanent tension was spread over the entire surface of the mixed iron wheel 1 using mortar. However, a stamp material was constructed around the anchor 12.

Wait for the mortar for fixing the brick to dry,
An aluminum core 2 was assembled inside the mixed iron wheel 1 and fixed on an anchor. As shown in FIG. 1, the core 2 is divided into two disk-shaped plates 5 a and 5 b of the inner mirror wall of the mixed iron wheel, divided into six in the axial direction of the mixed iron wheel (X direction), and divided into eight in the circumferential direction (L direction). 48 in total
Units (2A1-2A8, 2B1-2B8, 2C1-2C8,
2D1-2D8, 2E1-2E8, 2F1-2F8) were used.

The unit 2C4 of the core 2 corresponding to the furnace port is provided with an opening through which a person can enter and exit, so that a person can enter and exit after the completion of the core setting. Adjacent units were sufficiently fixed with bolts. That is,
Mirror wall plates 5a, 5b and each unit (2Ai, 2Bi, 2Ci, 2Di, 2
Ei, 2Fi) connected things that touched each other with bolts.

Anchors were arranged at the four corners of each core unit. As described above, one set of units (2D1,
2D2, 2D3, 2D4, 2D5, 2D6, 2D7, 2D8) (eight pieces) were provided with X-direction tapers TX. Further, the length of the ring-shaped divided panel 2D in the X direction is shorter than those of the other ring-shaped divided panels 2A, 2B, 2C, 2E, and 2F so that the panel can be easily pulled out.

Further, all the ring-shaped divided panels 2A, 2B,
In each of 2C, 2D, 2E, and 2F, one unit (2A1, 2B1, 2C1, 2D1, 2E1, 2F1) (six units) was provided with an L-direction extraction taper. In addition, each one unit (2A1, 2B
1,2C1,2D1,2E1,2F1), the length in the L direction is shorter than that of the other units so as to facilitate pulling out.

Further, each unit has a lever 7 shown in FIG.
A connecting member 8 and a supporting / fixing member 9 are additionally provided. As shown in FIG. 4, the core 2 was reinforced with an angle 14 from the inside of the mixed iron wheel so that the core 2 could withstand the earth pressure during construction. After assembling the core 2, a predetermined pouring refractory raw material and water are mixed in a vortex mixer, and the mixture is mixed with the core 2 and the back-up material 11 of the present invention described above from a position higher than the furnace mouth 4 of the mixed iron wheel. The casting work was performed in between.

The specifications of the core and the core unit were designed such that the construction thickness of the cast refractory was 150 to 400 mm. The cast refractory used had a composition of 10% SiC.
In _{-3% C-Al 2 O 3} , is obtained by adding 6.0% of water at the outer frame. After curing for one day, the core 2 was dismantled, removed from the outside of the pig iron wheel 1, and gradually heated from normal temperature to 900 ° C. and maintained, and dried over 4 days.

Regarding the de-framing operation of the core, in FIG. 1, each ring-shaped divided panel is arranged in the order of 2D → 2C → 2B → 2E → 2F → 2A. In each unit of the ring-shaped divided panel, for example, 2D1 → 2D2 → 2D3 → 2D4 → 2D5 → 2D6 → 2D7 → 2D8
As shown in the figure, we unframed from the unit with the smallest number.
In addition, the mixed iron wheel 4 is tilted sideways so that people can easily enter and exit, and for example, the mixed iron wheel 1 is rotated so that m is upward in FIGS. Removed frame from 2D core unit.

As described above, the ring-shaped divided panel 2D is provided with the X-direction extraction taper TX, which extends on both sides in the X direction with respect to the inside direction of the mixed iron wheel, on the side surface in the X direction in contact with 2C and 2E. Further, one unit is provided with L-direction tapers TL that extend on both sides in the circumferential direction with respect to the inside of the pig iron wheel at both circumferential edges. In the removal work, first, the 2D1 unit was pulled out using the lever structure shown in FIG.

As a result, the core frame could be easily pulled out by the effect of the taper. In addition, leverage helped to eliminate the risk of injury to the unit due to overpower. Next, the 2D2 unit was removed using the rotating shaft type connecting member (the connecting member) 6.

The connecting member 6 not only facilitates the removal of the unit by the principle of leverage, but also the unit 2D4 shown in FIG.
As shown in the example, there is an effect of preventing the unit from dropping, and the safety is improved. The connecting member 6 is provided at two locations in each unit at the contact points of the units in the circumferential direction.

The connecting member 6 is connected with a one-touch bolt so that the core frame can be easily removed after the core frame is separated from the casting material. next,
For example, in FIGS. 1 (b) and 1 (c), the mixture wheel is rotated so that the direction of m is downward, and as shown in FIG. did.

According to the procedure described above, one set of the slices of the other cores was removed in the order of 2C → 2B → 2E → 2F → 2A.
The X-direction abutting portions of each of the sets of core slices 2A to 2C and the X-direction abutting portions of 2E and 2F have no X-direction tapers, but are exemplified in the unit 2B1 in FIG. 1 (c). As described above, for each of the sets of core slices 2A to 2C, 2E, and 2F, one unit was provided with the above-described L-direction taper, and each unit could be easily and quickly removed.

In addition, one set 2A of the above-mentioned core slices
In each of the units from 2F to 2F, a connecting member 8 and a supporting / fixing member 9 for using a lever are provided, so that during the removal work, the work proceeds more easily and quickly by using the lever. did. According to the configuration and operation of the core of the present invention described above, according to the present invention, as a result of working by three people, the number of man-hours for the de-frame work can be reduced to a total of 24 workers × time.

Further, according to the present invention, the effect of the taper, the lever structure, and the connecting member of the rotating shaft type according to the present invention enables not only quick and efficient removal of the frame but also safety. Could be done. Moreover, according to the present invention, it was found from the result of measuring the construction thickness by boring that the construction accuracy of the cast refractory was good in the construction evaluation experiment.

This is presumably because the core of the present invention is divided in a ring-shape in the X direction, so that the distance between the core of the mixed iron wheel and the iron shell can be accurately set by reference of the core by the anchor. Next, in the mixed iron wheel on which the refractory was cast using the core of the present invention and subjected to 400 times of receiving and tapping in actual operation, the wear of the refractory was examined.

As a result, the decrease in the thickness of the cast refractory is
It was within the range of 110mm ± 25mm, which was not much different from the typical value of the actual value of bricks used in the conventional lining. (Comparative Example) In the above-described embodiment, the core shown in FIG.
That is, as shown in FIG. 3 described above, the inner wall of the mixed iron wheel having the iron receiving capacity of 250 t using the same number of cores except that the core tapping taper, the unit connecting member and the lever member are not provided. A layer structure was formed.

In the present comparative example, the core does not have a taper, so that when the core is set, a person easily enters and exits.
The furnace mouth was turned sideways, and the mixed iron wheel was rotated so that the direction of m in FIG. 6 (b) was upward, and assembled from the lower unit. Although the units were connected by bolts, the last uppermost unit did not have a taper and could not be set from the inside. Therefore, the flat plate was set by welding with an adjacent unit.

The welding was fixed one unit at a time in each of the ring-shaped divided panels. When removing the unit after casting the refractory, as in the case of setting the core, turn down the furnace opening sideways, rotate the mixed iron wheel so that the direction of m in Fig. 6 (b) is upward, and perform welding. The attached unit was cut, and the force of competing in the L direction of the unit was relaxed to remove the frame.

Other construction methods were the same as in the example. In this comparative example, when each unit was unframed, the force competing in the L direction could be reduced as described above.
Since Seriau force of the X-direction can not be relaxed, as schematically shown in FIG. 7, while Tsuchida a core unit in the X direction (f ₄ direction) by the hammer 31, pull out the core units in the chain block 30 It was necessary to be out of the frame, and as a result of working by six people, a total of 54 people × hours were required.

[0092] The mixed iron wheel on which the refractory was cast using the core of the above comparative example was subjected to 400 times of receiving and tapping in the actual operation, and the wear of the refractory was examined. as a result,
The decrease in thickness of the cast refractory was within 110 mm ± 25 mm, which was not much different from the typical value of the actual value of bricks used in the conventional lining. Although the embodiment and the comparative example of the present invention have been described above, the use of the core of the present invention can reduce the number of man-hours for deframe work by 55% as compared with the comparative example, and can achieve a significant reduction in man-hour. Was.

Further, the safety of the unframed work was remarkably improved. Although the embodiment of the present invention has been described above, as apparent from the operation of the present invention described above, the core dividing method in the present invention is not limited to the dividing method shown in FIG. The number of divisions in the direction and the number of divisions in the L direction can be arbitrarily set, and the number of divisions in the L direction can be arbitrarily set in each of the ring-shaped division panels independently of the other ring-shaped division panels. It is possible.

[0085]

As described above, according to the present invention, the construction accuracy in the refractory pouring into the interior of a mixed iron car is excellent, and the man-hours for removing the core after the pouring refractory curing is greatly reduced. Not only that, the work safety was significantly improved.

[Brief description of the drawings]

Figure 1 is a cross-sectional view of the core of an example of a division method and structure of the construction for prefabricated core of cast refractory of the present invention (a), Y ₁
-Y ₁ arrow view (b) and Y ₂ -Y ₂ arrow view is (c).

FIG. 2 is a sectional view showing an example of an assembling core for construction of a cast refractory of the present invention.

FIG. 3 is a cross-sectional view schematically showing a layered structure of a wall surface of a mixed iron wheel after refractory construction and before deframing work.

Figure 4 is a side view of the core of an example of a reinforcing angle mounting situation after the core assembly (a) and Y ₃ -Y ₃ parts cross-sectional view (b)
It is.

FIG. 5 is a sectional view of a core showing a method of using a rotating shaft type connecting member of the assembly type core for construction of a cast refractory of the present invention.

FIG. 6 is a sectional view (a) of the core showing a method and a structure of the assembly type core for construction of the cast refractory of the comparative example and Y ₄ −
Y ₄ is a view on arrow (b).

FIG. 7 is a sectional view of a core showing a method of removing a unit of a comparative example.

[Explanation of symbols]

1 Mixed iron wheel 2 Cores 2A, 2B, 2C, 2D, 2E, 2F, 20A, 20B, 20C, 20D, 20E, 20F Round panel 2B1, 2B2, 2B3, 2B4, 2B5, 2B6, 2B7, 2B8, 2D1 , 2D2,2D3,2D4,
2D5,2D6,2D7,2D8,20D1,20D2,20D3,20D4,20D5,20D6,20
D7,20D8 unit (core unit) 2M core for furnace 2M1,2M2 core for split furnace 3 steel shell 4 iron alloy furnace mouth 5a, 5b plate of core mirror wall 6 rotary shaft type connection 7 (Lever for pulling out unit) 7a Load point 7b Lever fulcrum 7c Connecting member 8 Connecting member 9 Supporting and fixing member 10 Pouring material (pouring refractory) 11 Backup material 12 Anchor 13 Anchor holder 14 angle 30 chain block 31 hammer X direction torpedo cars rotational axis (= torpedo car longitudinal direction) circumferentially L direction core (= torpedo car _{circumferentially) TX 1, TX 2, TL} 1, TL 2 tapered TX X direction taper TL L direction taper f ₁ Unit pulling direction f ₂ Unit moving direction f ₃ Chain moving direction of chain block f ₄ Hammer hammering direction (X direction) V ₁ Pouring gap for refractory filling V ₂ Pouring work Mixed iron car inside Work space

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masato Kumagai 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Inside the Technical Research Institute of Kawasaki Steel Corporation (72) Inventor Masao Nambu 1-chome Mizushima Kawasaki-dori, Kurashiki City, Okayama Prefecture None) Inside the Mizushima Works, Kawasaki Steel Corporation (72) Inventor ▲ Takanobu Shigenobu 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. No. 1576 Kawasaki Furnace Material Co., Ltd. at 1576 Nakahiro, Ako-shi, Ako (72) Inventor Noboru Komatsubara No. 1576 Kawasaki Furnace Material Co., Ltd. at 1576 Naka-hiro, Higashi-oki, Ako-shi, Hyogo (72) Inventor 2 Kawasaki Reactor Co., Ltd., 1576, Higashi-oki

Claims (5)

[Claims] 1. An assembly type for construction of a cast refractory having a cross-sectional shape determined by an outer periphery which is circular in a cross section perpendicular to the X direction which is the direction of the rotation axis of the mixed iron wheel and an inner periphery opposed to a working space inside the mixed iron wheel. A child (2), wherein the core (2) is X
Is divided into a plurality of panels (2A to 2F) in the direction of a circle, and each of the divided panels (2A to 2F) is divided into a plurality of units (2A1 to 2A8, 2B1) in the circumferential direction.
~ 2B8, 2C1 ~ 2C8, 2D1 ~ 2D8, 2E1 ~ 2E8, 2F1 ~ 2F8) and the plurality of units (2A1 ~ 2A8, 2B1
2B8, 2C1 to 2C8, 2D1 to 2D8, 2E1 to 2E8, 2F1 to 2F8), at least one unit (2D1) is provided on both side thickness portions in the X direction. It is characterized by having a punching taper (TX) that spreads on both sides in the direction, and a punching taper (TL) that spreads on both sides in the circumferential direction with respect to the inside of the mixed iron wheel, provided on both circumferential edges. Assembled core for construction of refractories poured into mixed-iron cars. 2. An assembly type for construction of a cast refractory having a cross-sectional shape determined by an outer periphery which is circular in a cross section perpendicular to the X direction which is the direction of the rotation axis of the mixed iron wheel and an inner circumference opposed to the internal working space of the mixed iron wheel. A child (2), wherein the core (2) is X
Is divided into a plurality of panels (2A to 2F) in the direction of a circle, and each of the divided panels (2A to 2F) is divided into a plurality of units (2A1 to 2A8, 2B1) in the circumferential direction.
~ 2B8, 2C1 ~ 2C8, 2D1 ~ 2D8, 2E1 ~ 2E8, 2F1 ~ 2F8), and at least one (2D) of the ring-shaped divided panels, each of a plurality of units (2D1 ~ 2D8) Are provided on the side thickness portions on both sides in the X direction.
(TX), and at least one (2D1) of the plurality of units (2D1 to 2D8) is provided at both edges in the circumferential direction. An assembling core for construction of refractories poured into a mixed-iron car, characterized by having a widened taper (TL). 3. A casting assembly for constructing a cast refractory having a cross-sectional shape determined by an outer periphery which is circular in a cross section perpendicular to the X direction which is the direction of the rotation of the pig iron wheel and an inner periphery facing the working space inside the pig iron wheel. A child (2), wherein the core (2) is X
Is divided into a plurality of panels (2A to 2F) in the direction of a circle, and each of the divided panels (2A to 2F) is divided into a plurality of units (2A1 to 2A8, 2B1) in the circumferential direction.
~ 2B8, 2C1 ~ 2C8, 2D1 ~ 2D8, 2E1 ~ 2E8, 2F1 ~ 2F8) and the ring-shaped split panel (2A ~ 2F)
In at least one (2D), a plurality of units (2D1
~ 2D8) each have a punching taper (TX) provided on both side thickness portions in the X direction and extending on both sides in the X direction with respect to the inside direction of the mixed iron wheel, and further, the ring-shaped split panel ( 2A to 2F), the plurality of units (2A1 to 2A8, 2B1 to 2B8, 2C1 to 2C8, 2D1 to 2D8, 2E1 to 2E
8, 2F1-2F8) at least one unit (2A1-2F1)
Has a taper (TL) provided on both edges in the circumferential direction and extending on both sides in the circumferential direction with respect to the inner direction of the mixed iron wheel. Expression core. 4. The unit divided in the circumferential direction (2A1-2A8, 2B1-2B8, 2C1-2C8, 2D1-2D8, 2E1-2E
8, 2F1 to 2F8) having a rotary shaft type connecting member (6) for connecting adjacent units in the circumferential direction and serving as a rotary shaft for removing the unit at the circumferential edge. Item 4. An assembling core for construction of a refractory poured into a mixed-iron car according to any one of Items 1 to 3. 5. The unit (2A1-2A8, 2B1-2B8, 2C1-2C8, 2D1-2D8, 2E1-2E) divided in the circumferential direction.
8, 2F1 to 2F8), at least one unit is
A member for connection with a load point of a lever for pulling out the unit
The mixed pig iron according to any one of claims 1 to 4, wherein (8) is provided, and at least one other unit has a supporting / fixing member (9) for supporting and fixing the fulcrum of the lever. Assembled core for construction of refractories poured into vehicles.