JPH1053805A - Torpedo car and method for pouring monolithic refractory in torpedo car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute the positioning and the fixing of a core arranged in a torpedo car for pouring monolithic refractory for lining the torpedo in good precision and good working efficiency. SOLUTION: Anchors 3 are inserted through plural through-holes 5 arranged on an iron shell 4 of the torpedo car from the outside to the inside of the car, and the head part 3A of the anchor 3 at the outside of the car is fitted and set to an anchor fixed base seat 7 arranged at the outside 4 of the iron shell of the torpedo car. The head part 3A at the outside of the iron shell is fixed with a bolt and a nut 9 from the outside with a fixed plate 8. The positioning and the fixing of the core 2 are executed with the anchor 3 in the good precision, and the monolithic refractory 13 is cast in a gap between a permanent lined refractory 12 formed on the inner surface of the iron shell 4 of the torpedo car and the core 2 to hold the monolithic refractory 13 with the anchor 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed-iron car equipped with a permanent cladding refractory formed on the inner surface of an iron-coated steel shell and an irregular-shaped refractory poured into the surface thereof, and an irregular-shaped refractory construction method for the mixed-iron car. It is about.

[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. Mixed iron wheels have also been used for more than ten years in pretreatment for removing silicon, phosphorus and sulfur from hot metal. Normally, the lining of a mixed iron car is constructed by stacking refractory bricks inside a steel shell. However, in order to cope with the shortage of skilled brick-laying workers in recent years and to reduce construction costs, the use of irregular-shaped refractories to be cast and replaced by bricks has been studied.
It is well known that amorphous refractories are widely used as lining refractories for ladle and blast furnace tapping gutters, and contribute to mechanization, automation and cost savings.

[0003] On the other hand, for the lining of mixed iron cars, casting is more difficult than ladles, etc.
The fact is that the use of amorphous refractories is not widespread.
In particular, in order to cast irregular-shaped refractories into mixed iron cars,
It is necessary to bring a core divided block serving as a formwork into the inside of the pig iron receiving port and assemble it inside, which hinders the efficiency of construction work or prevents mechanization and automation.

[0004] Attempts have been made to overcome these problems by pouring an irregular-shaped refractory into a mixed-iron car. For example, as for a core, a telescopic core having a fluid injected therein (ex. (See Japanese Patent Application Laid-Open No. 6-108135), and a core having a split panel mounted on a long shaft installed in the longitudinal direction of a mixed iron wheel car (see Japanese Patent Application Laid-Open No. 6-108135). However, in the former, there is a problem that since the core is flexible, the position of the core cannot be fixed sufficiently and the construction accuracy is inferior. In the latter, the core is positioned with reference to both ends of the long shaft.To ensure construction accuracy, the bending of the long shaft due to the pressure of the irregular-shaped refractory during casting is minimized. It needs to be suppressed.

However, in order to suppress the bending of the long shaft, it is necessary to use a structure having a large strength for supporting the long shaft with respect to an external reference point, and the positional relationship between this supporting structure and the long shaft. It is important to determine the accuracy. However, it is not easy to assemble a heavy structure that requires strength in a narrow mixed-iron car, and it is not always satisfactory in terms of construction accuracy and labor saving.

There is also known a method of inserting and fixing a positioning brick having a predetermined lining thickness inside a steel shell, and attaching a core based on the brick (see Japanese Patent Publication No. 3-3724). This method is different from the above two methods in that it leaves a problem in the position accuracy of the core and causes another problem in order to solve this accuracy problem. It is excellent in that you can decide. However, when pouring in irregular shaped refractories for repair,
After digging up worn positioning bricks in a mixed iron car, it is necessary to replace them with new bricks. This work is manual work in a dust-filled mixed iron car, which is not preferable in terms of occupational health and is also inefficient.

[0007]

SUMMARY OF THE INVENTION As described above, the structure of an iron-mixed wheel or ancillary structure thereof for accurately and efficiently positioning a core used for pouring an irregular-shaped refractory for lining of an iron-mixed wheel. The fact is that there was no way. In view of the above situation, in the present invention, a cast iron wheel structure capable of accurately and efficiently positioning a core for repairing or pouring an irregular-shaped refractory for lining of a mixed iron wheel. It is an object of the present invention to provide a method for implementing an amorphous refractory.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a mixed-iron vehicle provided with a permanent cladding refractory formed on the inner surface of an iron-mixed steel shell and an irregular-shaped refractory poured into the surface of the refractory. A plurality of through-holes provided in the mixed iron wheel, and inserted into these through-holes so as to protrude into the furnace from outside the furnace, and position and fix a core used for pouring the irregular-shaped refractory. Performed, a plurality of anchors that hold the cast refractory irregular-shaped refractory, and an anchor fixing structure that is disposed outside the iron-alloy steel shell and that fixes the furnace outer head of the anchor. An anchor fixing pedestal provided on the outside of a steel piggyback iron wheel to which an anchor head of the anchor is fitted and set, wherein the anchor fixing structure is provided with a core positioning and fixing structure. And the anchor fixed An anchor fixing plate for fixing an outer furnace head of the anchor set by fitting to a seat from the outside is preferably provided. It is preferable to provide a function of holding an irregular-shaped refractory that has been cast into a refractory.

[0009] The present invention also relates to a method for constructing an irregular-shaped refractory of a mixed-iron car having a permanent-reinforced refractory formed on the inner surface of a steel jacket of an iron-mixed car and an irregular-shaped refractory poured into the surface of the refractory. A plurality of through holes are provided in the steel shell, and anchors for positioning and fixing the core used for pouring the irregular refractory from outside the furnace are inserted into the through holes so as to protrude into the furnace. The furnace outer head is fixed by an anchor fixing structure provided on the outside of the iron-mixed car skin, and then a permanent-lined refractory is formed on the inner surface of the mixed-iron car steel shell. After positioning and fixing the core, the irregular-shaped refractory construction of the mixed-iron car is performed by pouring the irregular-shaped refractory into the gap between the core and the permanent refractory formed on the inner surface of the iron-mixed steel shell. Method, said permanent upholstery In some of the to retain the monolithic refractories was poured construction it is preferred.

Further, the present invention provides a method of manufacturing a refractory layer comprising a permanent cladding refractory layer and an amorphous refractory layer formed on an inner surface of a steel jacket of a pig iron wheel through a plurality of through holes provided in the steel shell of the pig iron wheel. A method for repairing a refractory of a mixed-iron car having a refractory structure in which a plurality of anchors extended and a furnace outer head of each anchor is fixed by an anchor fixing structure provided outside of the iron-coated steel shell, Among the plurality of anchors, the anchor existing in the damaged area of the refractory layer is taken out of the iron alloy wheel by removing the furnace outer head from the anchor fixing structure, and then a new anchor is inserted through the through hole. Into the furnace so as to protrude from the outside of the furnace, and fix the outer furnace head of the new anchor by the anchor fixing structure to position a core defining a pouring portion of the repairable refractory. And the core with the refractory surface in the damaged area A refractory repair method of torpedo cars, characterized in that the construction pouring castable refractory in casting portion which is.

After the furnace outer head of the anchor is detached from the anchor fixing structure and taken out of the steel shell of the pig iron wheel, the refractory surface in the damaged area may be treated.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial longitudinal sectional view of a mixed iron wheel provided with an anchor fixing structure outside a steel shell constituting the mixed iron wheel, and FIG. 2 is a plan view taken along the line AA of FIG. As shown in FIGS. 1 and 2, an anchor 3 for positioning and fixing the core 2 assembled in the mixed iron wheel 1 is provided with a plurality of through holes 5 (one through hole in the drawings) Only shown in the figure). The anchor 3 is used as a reference point for positioning the core 2 disposed inside the pig iron wheel 1, and is poured into the gap between the core 2 and the permanent cladding refractory 12 lined on the inner surface of the iron shell 4 of the pig iron wheel. It is used for the two purposes of holding the refractory 13 to be constructed.

Therefore, the length of the protrusion of the anchor 3 into the furnace is set to a length necessary for positioning the core 2 disposed inside the mixed iron wheel 1. The number of the plurality of through holes 5 provided in the iron-mixed iron core 4 is determined by the structure of the core 2. The smaller the number, the less the work of attaching the anchor 3, but it is necessary to position the core 2. It is determined taking into account that the number of reference points and the number of support points for supporting the refractory 13 are reduced.
When using bricks, ceramics, etc. that are more durable than the castable refractory 13 as the anchor 3,
It is possible to serve both purposes. The anchor 3 for the refractory 13 after casting
In order to improve the support performance of the anchor 3, it is preferable to provide a large number of irregularities on the outer peripheral surface of the anchor 3 to enhance the holding ability of the irregular-shaped refractory 13.

When the anchor 3 is used only as a positioning reference point of the core 2, metal or plastic can be used as the material, but if strength is required, metal is preferable. Irregular refractories after casting
If it is required to easily remove it from 13, it is preferable to use plastic. When metal or plastic is used, the irregular-shaped refractory 13 is removed after the application of the irregular-shaped refractory 13, and thereafter, the irregular-shaped refractory 13 is removed.
It will be replaced with bricks, ceramics, etc. having the above durability.

The shape of the furnace outer head 3A of the anchor 3 is, for example, a male hexagon, and the anchor fixing pedestal 7 having a female hexagonal inner surface shape fitted to the male hexagonal furnace outer head 3A. Is fixedly mounted on the steel shell 4 of the mixed iron wheel. An anchor fixing plate 8 is put on the outer furnace head 3A of the anchor 3 fitted into the female hexagonal anchor fixing pedestal 7 from outside, and the anchor fixing plate 8 is fixed by using a bolt and nut 9 passed through a bolt hole 10. Attach to anchor fixing base 7,
Thus, the anchor 3 is fixed. In addition, a drill fixing seat 11 is provided on the iron-coated steel shell 4 near the anchor fixing base 7.
Is provided.

The plurality of through-holes 5 are provided in the iron-mixed steel shell 4 because the anchor-fixed pedestal 7, the anchor-fixed plate 8, and the bolts and nuts 9 on the outside of the iron-plated steel shell 4. Is arranged so that the anchor 3 can be attached and fixed from outside the mixed iron wheel. As described above, since the anchor fixing structure 6 holding the anchor 3 is disposed outside the iron-coated steel wheel 4, wear and tear of the anchor-fixed structure 6 due to the influence of the heat of the mixed iron wheel 1, hot metal, slag, and the like. The occurrence of thermal distortion can be prevented.

In the following, the present invention will be described with reference to a work procedure in the case where the anchor 3 is mounted for the first time in a state where there is nothing in the iron-coated steel shell 4, the core 2 is positioned and fixed, and the irregular-shaped refractory is poured. . As described above, the anchors 3 are inserted into the plurality of through holes 5 provided in the iron-mixed steel bar 4, protruded into the furnace, and fixed by the anchor fixing structure 6. A permanent refractory 12 is lined on the inner surface of the iron-mixed steel wheel 4 using a spraying material, a stamp material, a brick or the like. This permanent refractory 12 is used as a backup material in the case where the irregular refractory 13 to be poured into the inside of the refractory 13 slides down or cracks for some reason and loses its function as the refractory lining of the mixed iron car 1. Becomes In addition, in order to strengthen the holding of the irregular-shaped refractory 13 to be later poured into the inside of the permanent-reinforced refractory 12, a part of the permanent-strength refractory 12 is made of the permanent-strength anchor brick, and the inside of the irregular-shaped refractory 13 is formed. It is preferable to arrange so as to partially protrude from the base.

Subsequently, the divided blocks divided in the longitudinal direction and the circumferential direction of the mixed iron wheel 1 are taken into the furnace from the receiving port of the mixed iron wheel 1 and are positioned while being positioned with reference to the anchor 3 protruding into the furnace. Assemble the child 2. Then, the irregular-shaped refractory 13 is poured into the gap between the core 2 and the permanent cladding refractory 12 formed on the inner surface of the iron-mixed steel wheel 4 from the receiving port of the iron-mixed wheel 1. After pouring, the resin is left for about 1 to 100 hours to harden the refractory. After the hardening of the amorphous refractory 13 is confirmed, the core 2 is disassembled in the mixed iron wheel 1 and taken out of the furnace from the receiving port of the mixed iron wheel 1 as a divided block.

Immediately after the amorphous refractory 13 is hardened, a large amount of added water remains, which is removed by heating. This drying step is carried out by bringing a burner into the mixed iron wheel 1 and heating it, and usually requires about 5 to 100 hours. Longer drying time is more suitable for preventing material defects, but it is desirable to reduce the drying time as short as possible from an economic viewpoint. Through a series of these operations, all the construction steps of the refractory for lining on the mixed iron car 1 are completed.

The core 2 to be used can be a wooden material such as plywood, a metal material such as steel or aluminum, a glass fiber reinforced plastic, or the like. Can be used. There is no particular limitation on the castable refractory 13 as well, and well-known alumina, silicon carbide, spinel, magnesia and the like can be used alone or in combination, and these materials can be used by using a mortar mixer or the like. After water is added and mixed, water is pumped by a squeeze pump or the like, or pouring is performed as described above using a height difference from a height.

Next, a description will be given of a construction method for repairing an irregular refractory lining a mixed iron car. Since the irregular-shaped refractory lining applied to the mixed iron wheel 1 by the irregular-shaped refractory lining described with reference to FIG. 1 and FIG. Need to be repaired at a stage where it remains to some extent.

In repairing, it is necessary to remove the old anchor 3 worn by use. This is an amorphous refractory
Along with the wear of 13, the anchor 3 is also worn and shortened, and the anchor 3 is supported by the iron core 4 on the reference point for assembling the core 2 in the furnace and the refractory 13 after casting. This is because it loses its function as a supporting material. Therefore, first, the bolt / nut 9 is removed and the anchor fixing base 7 is removed.
The anchor fixing plate 8 is removed from the furnace, and the old anchor 3 existing in the damaged area of the irregular-shaped refractory 13 is pulled out of the furnace. Since this extraction work can be performed from the outside of the pig iron wheel 1, the position of the anchor 3 can be accurately grasped,
In addition, since an automatic drill device or a cutter device can be fixed on the iron-mixed steel bar 4 and can be operated mechanically, automation becomes easy.

Incidentally, the old anchor 3 cannot be easily pulled out because the portion protruding into the furnace is fixed to the irregular refractory 13. Then, when the anchor fixing plate 8 is removed and the furnace outer head 3A of the anchor 3 is exposed, the furnace outer head 3A is drilled from outside the mixed iron wheel 1 using a drill or a cutter.
The anchor 3 is removed by cutting. For example, FIG.
As shown in the figure, the drill fixing seat provided on the steel
Drill fixing stand 14 is installed on 11 and this drill fixing stand
The drill blade 15a of the automatic drilling device 15 mounted on 14 is rotated to cut and remove the anchor 3. The drill fixing base 14 may be mounted on the anchor fixing base 7 using bolts and nuts 9.

Further, as shown in FIG. 4, a plurality of anchor fixing structures 6 (in this case, the anchor fixing pedestal 7 is a square female type,
The furnace outer head 3A is a square male type. Eight bolt holes 10 are provided in the anchor fixing base 7. ) And along the longitudinal direction of the mixed iron wheel, a rail 16 is provided, and by automatically moving the drill base 14 to the rail 16,
Anchor 3 is cut by semi-automation using an automatic drill device 15 mounted on a drill fixing base 14. At this time, the mixed iron wheel 1
When the rotation operations of the above are combined, the anchor 3 in the circumferential direction of the pig iron wheel 4 can also be cut using the automatic drilling device 15.

After the worn old anchor 3 is removed in this way, if necessary, the surface of the damaged area of the remaining irregular shaped refractory 13 is cleaned, and a new anchor 3 is inserted into the through-hole 5 by a furnace. Insert so that it protrudes inside. New anchor 3
Is fixed by an anchor fixing structure 6 to position and fix the core 2 defining the pouring portion of the irregular shaped refractory for repair, and then the irregular shaped refractory for repair is placed on the remaining irregular shaped refractory. The material 13 is poured in, repaired by adding and constructing.

At this time, it is preferable to fill the gap between the anchor 3 and the permanent refractory 12 or the like with mortar or the like in advance if necessary. By performing the care, deposits such as slag adhering to the surface are also removed, and the adhesion between the remaining amorphous refractory and the amorphous refractory 13 to be cast and poured is improved.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows an anchor fixing structure provided on the outside of the steel shell of the mixed iron wheel, which is the most important part of the present invention, and the structure around it. An anchor fixing pedestal 7 is arranged at a position surrounding the through hole 5 provided in the iron-mixed steel shell 4. 6% SiC-
A bolt-shaped anchor 3 made of a brick having a composition of 15% C-Al ₂ O ₃ is inserted from the outside of the furnace into the through hole 5 and protruded into the furnace, and a male hexagonal shape corresponding to the bolt head of the anchor 3 is formed. The furnace outer head 3A was fitted into a female hexagonal nut-like opening formed on the inner surface of the anchor fixing base 7.

The male hexagonal furnace outer head 3A and the female hexagonal nut-shaped opening were designed to have a slight clearance from each other. In addition, the unevenness 3B is provided on the portion corresponding to the bolt axis of the anchor 3 so that the irregular shaped refractory 13 after the casting is poured.
It is preferable to provide a function of retaining Cover the anchor fixing plate 8 from outside the furnace outer head 3A of the anchor 3 and
Four nuts are bolted together with nuts 9
Anchor 3 was fixed to the.

After that, a permanent brick 12A was laid over the entire inner surface of the iron-coated steel wheel 4 using mortar. At this time,
In order to reinforce the holding of the irregular-shaped refractory 13 to be cast, a number of permanent upholstery bricks 17 corresponding to twice the number of the anchors 3 are arranged inside the iron-coated steel wheel 4 and provided on the permanent upholstery bricks 17. The protruding portion is then buried and protrudes into the irregularly shaped refractory 13 to be cast. Waiting for the mortar of the permanent brick 12A to dry, the aluminum core 2 was assembled inside the mixed iron wheel 1.

For comparison, FIG. 6 shows a conventional structure in which the core 2 is positioned and fixed by the anchor bricks 18 formed by stacking bricks on the permanent bricks 12A formed in the iron-alloy steel shell 4. . In both cases of the present invention example shown in FIG. 5 and the comparative example shown in FIG.
As shown in (A) and (B) of FIG.
The divided block 2A divided into seven parts in the circumferential direction is assembled in the mixed iron wheel 1, and the anchor 3 and the anchor brick 18 are mixed iron wheels shown in FIGS. 8A and 8B. 1 and core 2 were arranged corresponding to the position of point P. The mixed iron wheel 1 used in the present invention example and the comparative example was 250
It has an iron receiving capacity of t.

The installation of the anchor 3 in the example of the present invention and the brick construction of the anchor brick 18 of the comparative example require man-hours of 20 hours / person and 25 hours / person, respectively.
Reduced man-hours. However, in each case, three people worked and the installation of the anchor 3 of the present invention example was completed in one day. However, when the anchor bricks 18 of the comparative example were brick-laid, the mortar was hardened. I had to wait, so I spent one day in the lower half of the pig iron wheel 1 and another day to rotate the pig iron wheel 180 degrees and lay bricks for the anchor bricks 18 in the upper half of the iron pig wheel 1 .

In addition, the anchor 3 according to the present invention is installed only from the outside of the pig iron wheel 1, and the mounting operation is extremely easy.
Most of the brickwork work was performed in the mixed iron car 1, and the work environment was poor, and the efficiency was reduced. As described above, according to the present invention, not only can the number of work steps and the number of construction days be reduced, but also the work environment can be improved.

Next, an irregular refractory prepared by mixing a predetermined amount of an irregular refractory raw material and water in a paddle mixer is used to make use of a difference in height from a deck approximately 1 m higher than a pig iron receiving port. After assembling the core 2 based on the anchor 3 of the present invention or the anchor brick 18 of the comparative example, the irregular refractory is set in the gap (set to 100 to 350 mm) between the core 2 and the permanent brick 12A. The thing 13 was poured and constructed. After curing for 1.5 days, the core 2 was dismantled and taken out of the pig iron wheel 1. The burner was brought into the mixed-iron car 1, and the temperature was gradually raised from room temperature to 900 ° C., and the drying was completed by maintaining the temperature at 900 ° C. for 4 days. Here, the refractory used was 10% SiC-8%
It is obtained by adding 6.3% of water at the outer frame in C-Al ₂ O ₃ based composition.

[0035] The mixed iron wheel constructed according to the present invention example and the comparative example was subjected to 500 times of receiving and tapping in actual operation.
The wear condition of the amorphous refractory 13 was investigated. In either case, the thickness reduction of the irregular shaped refractory is only
mm ± 25 mm, and there was no significant difference between the two. Further, after repeating the receiving and tapping of 500 times, according to the present invention example and the comparative example, the irregular-shaped refractory 13 was poured into the refractory lining remaining in the mixed-iron car 1 and repaired. . In the repair according to the example of the present invention, the old anchor 3 is replaced with the mixed iron wheel 1
And the new anchor 3 could be replaced with good workability from the outside by the above-described operation procedure.

In the conventional repair method of the comparative example, the anchor brick 18 was found with the naked eye in the mixed iron wheel 1 and removed using a rock drill. Thereafter, a new anchor brick 18 was fixed on the permanent brick 12A by mortar. At this time, only the old anchor bricks 18 under the feet can be removed, and the new anchor bricks 18 can be inserted only within the reach of the hands. Was. In particular, the work space at the conical portions at both ends in the longitudinal direction of the pig iron wheel 1 was so narrow that work was extremely inefficient.

The replacement of the anchor 3 in the example of the present invention and the replacement of the anchor brick 18 of the comparative example require man-hours of 30 h / person and 95 h / person, respectively, and the present invention has reduced the man-hour by about 70%. . In addition, in the example of the present invention, only the work from the outside of the pig iron wheel 1 is performed, whereas the replacement of the anchor bricks 18 of the comparative example is mostly the work inside the pig iron wheel 1, and particularly, rock drilling. When the old anchor bricks 18 were removed by using the machine, dust containing black smoke filled the inside of the mixed-iron wheel 1 and forced to work in an extremely poor environment. As described above, the repair method according to the present invention has achieved a significant reduction in man-hours and a significant improvement in the working environment.

Thereafter, the core 2 was assembled in the pig iron wheel 1 with the new anchor 3 as a reference, and finally, the irregular-shaped refractory 13 was poured into the core 2 and repaired by adding. After the pig iron wheel 1 repaired by the construction of the present invention example and the comparative example was repeatedly subjected to iron receiving and tapping 300 times in an actual operation, the amount of wear of the irregular-shaped refractory was investigated. In each case, the thickness reduction of the amorphous refractories was in the range of 65 mm ± 15 mm, and exhibited the same durability as the amorphous refractories that were initially constructed.

Although the preferred embodiment of the present invention has been described above, the installation position of the anchor 3, the type of division of the core 2, the division shape, the means for fixing to the iron alloy steel shell 4, and the like are limited to this embodiment. Instead, the present invention can be widely applied.

[0039]

As described above, according to the present invention, a plurality of through holes are provided in the steel shell of a mixed iron wheel, and anchors are inserted into the respective through holes so as to protrude from outside the furnace into the furnace. Can be fixed by an operation from outside the furnace with good environment using an anchor fixing structure. After accurately positioning and fixing the core based on the anchors protruding into the furnace, pouring or refilling the irregular-shaped refractory into the gap between the core and the permanent-strength refractory formed on the steel shell of the pig iron wheel As a result, the work efficiency can be greatly improved and the work environment can be improved. In addition, it is possible to improve the holding ability of the irregular-shaped refractory that has been cast by the anchor that protrudes into the furnace from the pig iron wheel.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a partial cross-sectional view of an anchor fixing structure provided outside a steel piggyback wheel.

FIG. 2 is a plan view showing an AA arrow of FIG. 1;

FIG. 3 is a side view showing a state in which an anchor fixing structure arranged outside a steel pig iron wheel is removed by an automatic drilling device.

FIG. 4 is a plan view showing a situation where an anchor fixing structure arranged outside a steel pig iron wheel is removed by an automatic drill device movably provided along a rail.

FIG. 5 is a cross-sectional view showing another embodiment of the present invention, showing an anchor fixing structure provided outside a steel piggyback and its surrounding structure.

FIG. 6 is a cross-sectional view showing the structure of an anchor brick provided in a conventional iron-mixed iron shell and its surroundings.

FIGS. 7A and 7B are explanatory views schematically showing a division state of a core arranged inside a mixed iron wheel, in which FIG. 7A is a sectional view of a round wheel of the mixed iron wheel, and FIG. FIG.

FIG. 8 is an explanatory view schematically showing a position of an anchor of the present invention or a conventional anchor brick for positioning a core placed in a mixed iron wheel in a schematic cross section, and FIG. FIG. 2B is a cross-sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mixed-iron wheel 2 Core 3 Anchor 4 Mixed-iron wheel 5 Through hole 6 Anchor fixing structure 7 Anchor fixing base 8 Anchor fixing plate 9 Bolt and nut 10 Bolt hole 11 Drill fixing seat 12 Permanent refractory 13 Indefinite refractory 14 Drill fixing stand 15 Automatic drilling equipment 16 Rail 17 Permanent tension anchor brick 18 Anchor brick

 ──────────────────────────────────────────────────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 of Kawasaki Steel Corporation (72) Inventor ▲ Takashi Shigenobu 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. (72) Inside the Mizushima Steel Works of Kawasaki Steel Corporation (72) Inventor Masakazu Iida Hyogo Prefecture Kawasaki Furnace Material Co., Ltd. (72) Inventor, Muneshima Kuroda 1-chome, Mizushima Kawasaki-dori, Kurashiki-shi, Okayama Pref. Noboru Komatsubara 1-chome, Mizushima-Kawasaki-dori, Kurashiki City, Okayama Prefecture (without address) Inside Kawasaki Furnace Materials Co., Ltd.

Claims (6)

[Claims] An iron-mixed car equipped with a permanent cladding refractory formed on the inner surface of a steel wheel of an iron-mixed wheel and an irregular-shaped refractory poured into the surface of the iron-rolled steel wheel. Each of these through holes is inserted so as to protrude from the outside of the furnace into the furnace, and performs positioning and fixing of the core used for the casting of the irregular refractory, and holds a plurality of the cast irregular shaped refractories. An iron-mixed car comprising: an anchor; and an anchor-fixing structure that is disposed outside the iron-mixed iron-sheath and that fixes an outer furnace head of the anchor. 2. An anchor fixing pedestal provided on the outside of a steel piggyback to which an anchor head of the anchor is fitted and set, wherein the anchor fixing structure is fitted and fitted to the anchor fixing pedestal. 2. The mixed iron wheel according to claim 1, further comprising: an anchor fixing plate that fixes the furnace outer head of the anchor from outside. 3. 3. The mixed iron car according to claim 1, wherein a part of the permanent tension refractory has a function of holding an irregular-shaped refractory poured into the steel shell of the mixed iron wheel. 4. A method for constructing an irregular-shaped refractory of a mixed-iron car having a permanent refractory formed on the inner surface of an iron-coated car and an irregular-shaped refractory poured into the surface thereof, A plurality of through holes are provided, and an anchor for positioning and fixing a core used for pouring the irregular refractory from outside the furnace into the through holes is inserted into the furnace so as to protrude into the furnace. The head is fixed with an anchor fixing structure provided outside of the iron-mixed car skin, and then a permanent refractory lining is formed on the inner surface of the iron-mixed car steel shell, and the core is positioned at the furnace inner end of each anchor. And fixing the refractory material to the gap between the core and the permanent cladding refractory formed on the inner surface of the steel shell of the mixed iron wheel. 5. The method according to claim 4, wherein the cast refractory is held by a part of the permanent refractory. 6. Extending through a plurality of through-holes provided in the iron-mixed steel shell to the inside of a refractory layer composed of a permanent-strength refractory layer and an amorphous refractory layer formed on the inner surface of the iron-mixed steel shell. In the method for repairing a refractory of a pig iron wheel having a refractory structure in which a furnace outer head of each anchor is fixed by an anchor fixing structure provided outside the iron pig iron shell, the plurality of anchors are provided. Of the anchors that exist in the damaged area of the refractory layer,
Remove the furnace outer head of the anchor from the anchor fixing structure and remove it to the outside of the pig iron wheel, and then insert a new anchor into the through hole so as to protrude into the furnace from outside the furnace,
The outer core of the new anchor is fixed by the anchor fixing structure, the core for defining the pouring portion of the repairable refractory is positioned, and the core is partitioned between the refractory surface in the damaged area and the core. A method for repairing refractories of a mixed-iron car, characterized by pouring an irregular-shaped refractory into a poured pouring part.