JP3423847B2 - Irregular refractory construction system in steelmaking plant - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a water content of 2 to 8% by weight when kneading in an unshaped refractory construction site such as a converter, a gutter, a ladle, a pig iron car, and a CAS dipping pipe in a steelmaking plant.
The present invention relates to an irregular refractory construction system capable of rationally conveying and constructing irregular refractory materials.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 10, a steelmaking plant B has a converter 90, a gutter 91, a ladle 92, and a mixed piggy wheel 9 therein.
3. There are many irregular refractory construction sites such as the CAS dip tube 94. Wear bricks will be melted by erosion by molten metal at these irregular refractory construction sites.A method of spraying irregular refractory onto the melted point is one method of repairing such melted point. It has been known.

[0003]

However, the repair work by spraying the above-mentioned irregular shaped refractory material still has the following problems to be solved. That is, as shown in FIG. 10, a converter 90, a gutter 91, a ladle 92, a mixed pig wheel 93, and a CAS.
Construction material kneading equipment, that is, amorphous refractory material kneading equipment 95, 96, 97, 98, 9 for each construction site such as the dipping pipe 94
9 and the like are provided. Therefore, from the viewpoint of the equipment cost of the steelmaking plant B, it was extremely unreasonable. Similarly, each of the construction material kneading facilities 95, 96, 97, 98, 99, etc. requires a large installation space, which is unreasonable from the viewpoint of effective use of the space of the steelmaking plant B.

Further, in recent years, in the spraying of amorphous refractories, it is desired to spray a large amount of amorphous refractory having a low water content of 2 to 8% by weight for the purpose of significantly shortening the construction time. However, when the irregular refractory kneading equipment 95, 96, 97, 98, 99, etc. is provided for each construction site as in the conventional case, the following problems occur. 1) In order to spray the amorphous refractory after kneading at the local factory, it is necessary to batch-mix the amount of spraying each time, but because the amorphous refractory has a low kneading water content, the kneading machine and the storage tank are large. Turn into. 2) Moreover, since the kneading water content is low, it is necessary to clean the kneading machine and the storage tank after each spraying operation, which causes labor and material loss. 3) In order to follow the construction ability, it is difficult to follow up even if the equipment is large, and the quality of the construction body is impaired due to uneven mixing of the materials and variations in water content, curing agent, etc. The present invention has been made in view of such circumstances, by consolidating the construction material kneading equipment in one place, it becomes possible to spray a large amount by using an amorphous refractory having a low kneading water content, It is an object of the present invention to provide an irregular refractory construction system for a steelmaking plant that can rationalize construction.

[0005]

A method according to the above-mentioned object.
Irregular refractory construction system in the ironmaking plant described, in the irregular refractory construction system in the ironmaking plant capable of constructing a plurality of irregular refractory construction site is arranged in the ironmaking plant, the above, A construction material kneading facility is provided in one place of an iron manufacturing plant, and 2 to 8% by weight of water and a hardening agent are added to the construction material required by each of the irregular refractory construction sites in the construction material kneading facility and mixed.
Transport the kneaded mixture to each of the irregular refractory construction sites,
At the construction site of each of the irregular refractory materials, the kneaded material is irregular refractory
Transported as a product at a transport pressure of 10 to 100 kgf / cm ^2.
While pumping the inside of the pipe, the blower installed at the tip of the conveying pipe
Addition amount of the curing agent in the amorphous refractory in the attached nozzle
3 to 13% by weight of a curing accelerator is added to 4-1
Spraying on the construction surface of the construction body with a spraying pressure of 0 kgf / cm ² .
Kick The irregular refractory construction system in an iron manufacturing plant according to claim 2 is the irregular refractory construction system in the iron manufacturing plant according to claim 1, wherein the plurality of irregular refractory construction sites arranged in the iron production plant Construction schedule, the amorphous refractory and, based on each information of the amount used, the required amount of each irregular refractory, carbon-containing irregular refractory, and carbon-free irregular refractory In addition to the lot composition, the kneading order is prioritized for the carbon-free amorphous refractory.

Here, the moisture content of the amorphous refractory is set to 2 to 8
If the content is less than 2% by weight, the flow resistance when the amorphous refractory is supplied from the irregular refractory supply hose sharply increases and an excessive conveying pressure is required. It is because tends to occur clogging in the refractory spray nozzle and the conveying pipe, while Exceeding 8% by weight, although the flow resistance is reduced, the porosity of the construction material is increased, the strength and corrosion resistance Because it makes it worse. The transport pressure of the irregular refractory is set to 10 to 100 kgf / cm ^{2 because} it is 10 k.
If it is smaller than gf / cm ² , it is difficult to maintain the predetermined spraying speed, causing not only troubles such as clogging of irregular refractory but also irregular refractory is not compressed sufficiently during transportation. In addition, the density of the sprayed particle agglomerates decreases at the time of discharging from the spraying nozzle, which causes deterioration of quality characteristics such as the density of the sprayed work body. Also, 100
This is because if it is larger than kgf / cm ² , the load on the transfer equipment such as the transfer pump or the transfer pipe becomes excessive and the maintenance cost increases.

The reason why the amount of the curing accelerator added is 3 to 13% by weight of the amount of the curing agent in the irregular shaped refractory is that if the amount is less than 3% by weight, a sufficient curing acceleration effect of the curing agent cannot be expected. On the other hand, even if it is added in an amount of more than 13% by weight, the curing time hardly changes, the raw material cost increases, and the quality characteristics of the sprayed construction product are impaired. The spray pressure of amorphous refractory is set to 4-10 kgf / cm ² because it is 4 kg
If it is smaller than f / cm ² , the spraying capacity is lowered, the apparent porosity is increased, and problems such as corrosion resistance are caused.
On the other hand, if it is larger than 10 kgf / cm ² , rebound loss occurs during spraying, the apparent porosity of the construction layer increases, and it becomes difficult to hold the spray nozzle during construction.
This is because the mechanism also needs to be strengthened.

The amorphous refractory construction system for an iron manufacturing plant according to claim 3 is the irregular refractory construction system for an iron manufacturing plant according to claim 1 or 2 , wherein the construction material is a carrier equipped with a mixer, It is conveyed from the construction material kneading equipment to the irregular refractory construction site. The irregular refractory construction system in an iron manufacturing plant according to claim 4 is the irregular refractory construction system in an iron manufacturing plant according to claim 1 or 2 , wherein the construction material is the construction material by a carrier vehicle equipped with a container. It is transported from the kneading equipment to the above-mentioned irregular refractory construction site.

[0009] monolithic refractory construction system in steel plant of claim 5, wherein, in the castable refractory construction system in steel plant according to claim 3 or 4, wherein the transport vehicle is equipped with a pressure pump. The irregular refractory construction system in the steel plant according to claim 6 ,
5. In the irregular refractory construction system in the steel plant according to 5, in the irregular refractory construction site, the discharge port of the pressure pump mounted on the carrier is detachably connected to the base of the spray pipe by a coupling. Be connected.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. First, with reference to FIG. 1, a conceptual configuration of an irregular refractory construction system in an iron manufacturing plant according to an embodiment of the present invention will be described.

As shown in the drawing, in a steelmaking plant A having a vast site area, a converter 10, a gutter 11 and a ladle 1 are provided.
2. There are a large number of unshaped refractory construction sites such as 2, the hot metal 13 and the CAS dip pipe 14. On the other hand, in the steel manufacturing plant A, the construction material kneading equipment 15 is arranged in a form integrated in one place. And construction material kneading equipment 15
And each of the irregular refractory construction sites are communicated with each other by a carrier vehicle 18 equipped with a mixer 16 and a pressure pump 17. That is, the amorphous refractory material kneaded by the construction material kneading facility 15 is conveyed to each irregular refractory material construction site 10, 11, 12, 13, 14 by the carrier vehicle 18, and thereafter, each site 10, 11, 12, It will be constructed at 13, 14.

Further, as shown in FIG. 1, the construction material kneading equipment 15 is connected to each of the irregular refractory construction sites 10, 11, 12, 13, 14 by personal computer communication a, and
It is connected to the raw material manufacturer 19 by personal computer communication b.

In the present embodiment, each time there is a need for construction of an irregular refractory at any of the irregular refractory construction sites 10, 11, 12, 13, 14, a single need information regarding the construction material is used. It is transmitted to the material kneading equipment 15, and based on this information, the construction material kneading equipment 15 purchases the necessary raw materials from the raw material manufacturer 19 and kneads the construction materials, and then mixes the kneading construction materials with each irregular-shaped refractory construction site 10 , 11, 12, 13, and 14 can be conveyed while being kneaded by using a conveyance vehicle 18, and can be quickly installed.
Therefore, in the present embodiment, it is possible to significantly reduce the equipment cost of the entire steelmaking plant A, and also to reduce the installation space of the construction material kneading equipment 15 as much as possible, and thus the irregular fire resistance. It is possible to significantly rationalize the construction work.

Particularly, in the case of the steelmaking plant A, the content of the construction needs of the irregular refractory at each of the irregular refractory construction sites 10, 11, 12, 13, and 14, that is, the required composition of the irregular refractory is remarkable. With the difference, the amount used
When repairing, the amount is relatively small, but there are cases where a large amount of irregular refractory material is required as in the case of full-scale construction. In the present embodiment, since the construction material kneading equipment 15 is a centralized type, it is possible to easily follow up even with a large capacity. That is, since the irregular refractory construction system can intensively produce the irregular refractory in the construction material kneading facility 15, both the repair and the construction can be easily dealt with. That is, not only the local repair of the refining vessel but also the construction of a new furnace and a wide range of repairs are possible, and the application range of the amorphous refractory can be expanded. Further, since the irregular refractory construction system can intensively produce the irregular refractory in the construction material kneading facility 15, the construction materials can be uniformly kneaded,
It is possible to improve the quality of the construction body by eliminating variations in water content and curing agent. Further, the amorphous refractory required from each steel manufacturing plant A is classified into an amorphous refractory containing no carbon and an amorphous refractory containing carbon such as SiC, MgC, or carbon depending on the product type. By kneading and kneading, for example, an amorphous refractory material containing no carbon such as Al ₂ O ₃ and MgO, cleaning of the kneading equipment, refractory loss, etc. can be reduced, and deterioration of the kneaded material can be suppressed.

Next, with reference to FIGS. 2 to 4, a concrete configuration of the irregular refractory construction system in the ironmaking plant according to the present embodiment will be described. The case where the irregular refractory construction site is the ladle 12 will be described. First, a specific configuration of the construction material kneading facility 15 will be described with reference to FIGS. 2 and 3. As shown in the figure, a plurality of building columns 21 are erected on the floor surface 20. Building support 21
The upper, middle, and lower horizontal frames 22, 23, 24 are erected at a predetermined distance from the floor surface 20 upward.

A traveling rail 25 is laid on the upper horizontal frame 22, and a traveling carriage 28 having a hoisting crane 26 and a reversing device 27 is movably mounted on the traveling rail 25. There is. Three hoppers 29, 30, 31 are attached in parallel to the horizontal frame 23 in the middle stage, and the chute 35, through the cutout gates 32, 33, 34 at the lower part of the hoppers 29, 30, 31 are attached. 36 and 37 are attached.

Here, the hopper 29 is filled with an adjusting raw material (a mixed raw material in which an aggregate such as alumina and silica and a curing agent are kneaded and adjusted in advance) introduced from a container 45 described later. The hopper 30 is filled with coarse aggregate (for example, a particle size of 5 mm or more) such as fused alumina. This coarse aggregate is used to prevent the development of cracks in the construction body after construction, but if mixed in the above-mentioned adjustment raw material from the beginning, it causes segregation, so at this stage, adjustment It is arranged so as to be charged into a mixer 38 described later together with the raw materials. The hopper 31 is filled with used waste brick scraps, and the waste brick scraps are used as coarse aggregate. In addition, the raw material with which the hoppers 30 and 31 are filled is not limited to the above-described coarse aggregate, and other types of coarse aggregate can also be filled. In this embodiment, the construction material is composed of the adjusted raw material and the coarse aggregate.

A mixer 38 is attached to the upper part of the lower horizontal frame 24, and the upper part of the mixer 38 is provided with hoppers 29, 3 via chute 35, 36, 37.
It is connected to 0 and 31. Further, an automatic water weighing device 38a is connected to the mixer 38, and water is added at a rate of 2 to 8% by weight to the adjusted raw material and the like fed into the mixer 38 from the above-mentioned hoppers 29, 30, 31. The amount of water added is set to 2 to 8% by weight because when the amount is less than 2% by weight, the construction body cannot be constructed.
If ultra-be is because the quality of the construction material is lowered.

The mixer 38 has a hardener tank 38.
b and the delay adjusting agent tank 38c are connected to each other, and the curing agent and the delay adjusting agent are added to the adjusting raw materials and the like fed into the mixer 38 from the above-mentioned hoppers 29, 30 and 31, respectively. Here, since the delay adjusting agent has a water content of 8% by weight (preferably 6% by weight) or less in the kneaded amorphous refractory, the content of the amorphous refractory is increased during transportation using the container 45 described later. In order to prevent thickening (curing, deposition), 0.3 wt% or less is added. Then, the curing delay due to this delay adjusting agent is adjusted by the curing accelerator added at the tip of the spray nozzle at the time of spraying.

As the hardening agent, inorganic and organic hardening agents having hardening properties such as alumina cement, Portland cement, and phenol resin are used. In particular, as a curing agent that is preferably used, there is alumina cement or a mixture of magnesia and silica ultrafine powder, and it is desirable to add 2 to 10% by weight to the total amount of the refractory powder and the curing agent. On the other hand, as a delay adjusting agent, NaC
1, a small amount of KCl, BaCl ₂ , MgCl ₂ , CaCl ₂ , OH-COOH acid and carbohydrate salts, citric acid,
Tartaric acid, gluconic acid, glycol, glycerin, sugar, wheat flour, casein, starch, cellulose products, borax, lead salts, phosphates, AlO ₃ , lignin sulfonic acid, HCl, CH ₃ COOH, etc. can be used. it can.

Further, as shown in FIG. 3, a chute 39 is attached to the lower part of the lower horizontal frame 24,
At the lower part of the chute 39, a transport vehicle entry space 40 is formed. In the state shown in FIGS. 2 and 3, the carrier vehicle 18 has entered the carrier vehicle entry space 40.

As shown in FIG. 3, the upper horizontal frame 2
One end of 2 extends along with the traveling rail 25 outward from the building support column 21, and the extended end is supported by an auxiliary building support column 41 standing on the floor surface 20. A container lifting space 42 is formed between the auxiliary building support column 41 and the building support column 21, and the lower part of the container lifting space 42 communicates with the container entry space 43. Further, the container entry space 43 is connected and communicated with the adjacent container stock yard 44. And
Multiple containers 4 in container stockyard 44
5 is filled with adjusted raw materials whose components have been adjusted in advance, and coarse aggregate such as fused alumina and waste brick scraps. Further, the container stock yard 44 has a lifter 4 used for loading containers 45 over a plurality of stages.
4a is arranged.

FIG. 4 shows a concrete structure of the carrier vehicle 18. As shown in the figure, an auxiliary carrier 47 is connected to the rear of the carrier 46 of the transport vehicle 18, and the carrier 46 and the auxiliary carrier 47 are connected to each other.
A mixer 16 and a pressure feed pump 17 are mounted respectively. Further, one end of a flexible hose 48 is connected to the discharge port of the pressure pump 17. On the other hand, the other end of the flexible hose 48 is coupled to the base portion of the spray pipe 49 arranged near the ladle 12 when the carrier 18 is moved to the ladle 12, which is an example of an irregular refractory construction site. It will be detachably connected by 50. A spray nozzle 49e is attached to the tip of the spray pipe 49, and one end of a curing accelerator injection pipe 49a is connected to the spray nozzle 49e. The other end of the hardening accelerator injection pipe 49a is connected to a hardening accelerator supply device 49b, and the copressor 49 is connected to the hardening accelerator supply device 49b.
c and the curing accelerator tank 49d are connected.

With this structure, the construction material kneaded by the mixer 16 mounted on the carrier vehicle 18 is received from the construction material kneading equipment 15, and the construction material supplied to the pressure feed pump 17 by the driving of the mixer 16 is the pressure feed pump. It is supplied to the spray pipe 49 through the flexible hose 48 by the drive of 17, and is sprayed from the spray nozzle 49e connected to the tip thereof. At this time, the compressor 49c is also driven to generate compressed air, and the curing accelerator dropped on the compressed air from the curing accelerator tank 49d to the curing accelerator supply device 49b is sprayed from the spray nozzle 49e. It will be effectively mixed into the standard refractories.

Here, the curing accelerator is an auxiliary agent used for adjusting the curing time of the above-mentioned curing agent, and is potassium aluminate, sodium silicate, potassium silicate, sodium hydroxide, potassium hydroxide, calcium hydroxide. , Sulfuric acid, sulfate, nitrate, sodium carbonate, potassium carbonate, lithium salt, lithium salt + alumina cement hydrate, 2% by weight or more of alumina cement hydrate, Portland cement and the like. In addition, these hardening accelerators can be used as an aqueous solution of a predetermined concentration as needed.

In the illustrated embodiment, as shown in FIG. 4, the transport vehicle 18 is equipped with the mixer 16 and the pressure pump 17, but only the mixer 16 is mounted and the pressure pump 17 is installed at the construction site. You may do it. Also,
A container container (not shown) is mounted on the carrier 18 in place of the mixer 16, and the container container receives an unshaped refractory material, which is a kneaded material, from the construction material kneading facility 15, and then the container container is installed at the construction site. Place it firmly on the upper surface of the hopper using a lifter or the like. Then, by operating the on-off valve provided at the bottom of the container container, the irregular refractory material flows out into the hopper, and the pressure pump installed at the bottom of the hopper is driven to blow the irregular refractory material onto the pipe. 49 can be supplied.

Further, in the present embodiment, as shown in FIG. 3, the dust collecting device 24a is mounted on the lower horizontal frame 24. On the other hand, in the dust collecting device 24a, the base portion of the first dust collecting duct 24b, the tip portions of which are connected to the upper portions of the hoppers 29, 30, 31 and the tip portion of the mixer 38, respectively.
The base of the second dust collecting duct 24c connected to the upper part of the is connected.

With the above-mentioned structure, the lifter 44a is operated based on the needs information concerning the construction material sent from the ladle 12 which is an example of the site for the construction of the irregular refractory.
A desired container 45 is transferred from the container stock yard 44 to the container entry space 43. After that, the container 45 is attached to the reversing device 27 and lifted by the hoisting crane 26. The container 45 hung up to the upper horizontal frame 22 is conveyed to a position above the hoppers 29, 30, 31 by the traveling carriage 28. Reversing device 2
The container 45 is inverted by operating 7 and the adjusted raw materials having different components or compositions are stored in the corresponding hoppers 29, 30, 31.

After that, the cut-out gates 32, 33, 34
By operating the above, the adjusted raw materials having different components or compositions, the fused alumina, the waste brick scraps, and the like are cut out from the hoppers 29, 30, 31 into the mixer 38 at a desired mixing ratio, and an automatic water weighing device is also provided. 2 to 8% by weight of water is added from 38a, and a hardening agent and a delay adjusting agent are added from a hardening agent tank 38b and a delay adjusting agent tank 38c. After that, the mixer 38 is operated to adjust the raw materials and the like,
Water, a hardening agent, and a delay adjusting agent are mixed and stirred to knead the construction material.

The construction material thus kneaded is put into the mixer 16 of the carrier 18 through the chute 39. After that, the construction material is conveyed to the ladle 12 while being mixed and stirred by the mixer 16, the curing accelerator is injected into the spray nozzle 49e attached to the tip of the spray pipe 49, and the mixture is kneaded. It will be sprayed from the tip of 49 to the melting point of the ladle 12. That is, a single construction material kneading facility 15 arranged in the steelmaking plant A
By kneading the construction material suitable for the ladle 12, and then
The construction material can be conveyed to the ladle 12 while being kneaded by using the conveyance vehicle 18, and can be promptly constructed.

Further, in the present embodiment, the construction material is conveyed from the construction material kneading equipment 15 to the ladle 12 by the carrier vehicle 18 having the mixer 16 and the pressure pump 17 mounted thereon. It is possible to reliably prevent the amorphous refractory from being hardened while being conveyed from the material kneading facility 15 to the ladle 12. Further, in the present embodiment, in the ladle 12, the discharge port of the pressure feed pump 17 mounted on the transport vehicle 18 is detachably connected to the base of the spray pipe 49 by the coupling 50. , Carrier 1
It is possible to quickly perform the work of spraying the irregular-shaped refractory from 8 to the ladle 12, and to perform the irregular-shaped refractory construction work promptly.

Next, in case of applying the irregular refractory to the mixed piggy wheel 13, the gutter 11, the converter 10 and the CAS dipping pipe 14 which are other than the ladle 12, the irregular refractory construction site is shown in FIG.
~ It demonstrates with reference to FIG. FIG. 5 is a conceptual configuration explanatory diagram in a plan view when the mixed piggy car 13 is an irregular refractory construction site. As shown in the drawing, a tap hole 51 is provided on one side of the mixed pig iron wheel 13, and a spray pipe 66 is arranged on the floor surface so as to be retractable in the mixed pig iron wheel 13 through the tap hole 51. ing.

That is, as shown in FIG. 5, a traveling carriage 52 is disposed on the floor so as to be able to travel in the front, rear, left and right directions, and a long base arm 53 is arranged on the traveling carriage 52 in the left and right directions. It is arranged to be vertically movable and rotatable about its axis. A multi-joint arm 54 is attached to the front end of the base arm 53.
4 are motors (preferably an electric servo motor)
55 to 59 are arm members 60 to 64 that are relatively bendable relative to each other. The base of the spray pipe 66 is attached to the tip of the arm member 64 by a motor 65 so as to be rotatable about its axis and bendable. The base of the spray pipe 66 is connected to the discharge port of the pressure pump 17 of the carrier 18 via a flexible hose (not shown), and the tip of the spray pipe 66 has a curing accelerator injection pipe (not shown). ) Is connected.

Further, a television camera device 67 is attached to the front end of the arm member 64 to monitor the melted point where the construction material is sprayed from the spray pipe 66.
The rear portion of the spray pipe 66 is communicatively coupled to the pressure pump 17 mounted on the transport vehicle 18 via a coupling (not shown). Therefore, like the ladle 12 described above,
A vehicle 18 for delivering construction materials from a single construction material kneading facility 15
It is possible to convey to the pig iron wheel 13 while kneading and stirring by using, and thereafter, an amorphous refractory can be quickly sprayed on the melted portion inside the pig iron wheel 13.

Further, the operator can freely and accurately enter the spray pipe 66 into the inner part of the elongated internal space 70 of the towing car 13 while looking at the monitor device 69 in the cab 68. Even if the damaged portion exists in such a deep portion, the melted damaged portion can be repaired reliably and accurately.

Next, with reference to FIG. 6, the case where the irregular refractory construction site is a gutter 11 such as an incoming gutter will be described. As shown, the turntable 72 of the traveling carriage 71.
The raising / lowering arm 73 is attached to the
3, a flexible spray pipe 75 having a discharge portion 74 at the tip is attached. The spray pipe 75
The base of the carrier 18 is connected via a flexible hose 72a.
Is connected to the discharge port of the pressure pump 17 and the tip of the spray pipe 75 has a hardening accelerator injection pipe (not shown).
Are connected. Therefore, similarly to the ladle 12 described above, the construction material can be conveyed from the single construction material kneading facility 15 to the gutter 11 while kneading and stirring the construction material using the transport vehicle 18, and thereafter, the construction material is mixed with the gutter 11. It is possible to quickly spray the inner melted point.

Next, with reference to FIGS. 7 and 8, a case where the site of construction of the irregular refractory material is the converter 10 will be described.
As shown in the drawing, a base portion of a bendable pipe support arm 78 is attached to a turning table 77 of a crawler-type traveling carriage 76 so as to be capable of tilting and turning, and a tip portion of the pipe support arm 78 is A spray pipe 80 having a discharge portion 79 at its tip is attached. In addition, the base of the spray pipe 80 is provided with a flexible hose (not shown) through which the carrier 1
8 is connected to the discharge port of the pressure pump 17, and
A curing accelerator injection pipe (not shown) is connected to the tip of the spray pipe 80.

Therefore, as with the ladle 12 described above, the construction material can be conveyed from the single construction material kneading facility 15 to the converter 10 while kneading and stirring the construction material using the carrier vehicle 18, and then the construction material. Can be quickly applied to the melted point inside the converter 10.

Next, with reference to FIG. 9, the case where the irregular refractory construction site is the CAS (composition adjusting tank) dipping pipe 14 will be described. As shown in the figure, a pipe support tube 82 is mounted on a pantograph type lifting table 81 installed on the floor.
Is installed upright, and at the tip of the pipe support tube 82,
The spray pipe 85 including the lower pipes 83 and 84 is connected. Here, the base of the lower pipe 84 is the pipe support cylinder 8.
The front end of the second pipe is rotatably connected by a rotary joint 86, while the base of the upper pipe 83 is rotatably connected by a rotary joint 87 to the front part of the lower pipe 84. The base of the lower pipe 84 is connected to the discharge port of the pressure feed pump 17 of the carrier vehicle 18 via a flexible hose (not shown), and the upper pipe 8
A curing accelerator injection pipe (not shown) is connected to the front end of 3.

In the case of repairing the inner surface of the CAS dip pipe 14, the spray pipe 85 can be coaxially aligned with the pipe supporting cylinder 82, and in the case of repairing the outer surface, the pipe supporting cylinder 8
It can be arranged in parallel at a position decentered from 2. Therefore, as with the ladle 12 described above, the construction material can be conveyed from the single construction material kneading facility 15 to the CAS dipping pipe 14 while kneading and stirring the construction material using the transport vehicle 18, and then the spray pipe 85 is used. After being aligned with the pipe support tube 82, the construction material can be promptly applied to the melted point inside the CAS dip tube 14. On the other hand, in the case of repairing the outer surface, the spray pipe 85 is placed at an eccentric position from the pipe support cylinder 82, and then the spray pipe 85 is rotated around the outer peripheral surface of the CAS dipping pipe 14 so that the construction material is CA.
It is possible to promptly construct the melted portion outside the S dipping pipe 14.

The present invention has been described above with reference to the embodiments, but the present invention is not limited to the structures described in the above embodiments, and is described in the claims. It also includes other embodiments and modifications that are conceivable within the scope of the matters.

[0042]

In the irregular refractory construction system in the ironmaking plant according to claims 1 to 6 , a construction material kneading facility is provided at one location of the ironmaking plant, and each irregular refractory construction site is installed in the construction material kneading facility. in construction materials that require
The kneaded product obtained by adding 2 to 8% by weight of water and a curing agent is conveyed to each of the irregular refractory construction sites, and the irregular refractory is applied.
At the work site, the kneaded material is used as an irregular refractory material for 10 to 100 k
It is common to pump the inside of the transfer pipe with the transfer pressure of gf / cm ^2.
In addition, indefinite fire resistance in the spray nozzle installed at the tip of the transfer pipe
3 to 13% by weight of the amount of curing agent added in the product
Add a propellant and apply it at a spraying pressure of 4 to 10 kgf / cm ^2.
It is sprayed on the construction surface of the structure. Thus, whenever there is a need for construction of an irregular refractory at any of the irregular refractory construction sites, the construction material is kneaded in the construction material kneading equipment and the kneaded construction material is transferred to each irregular refractory construction site. Since it can be transported and constructed, the facility cost of the entire steelmaking plant can be greatly reduced, and the installation space for the construction material kneading facility can be made as small as possible, making it possible to use irregular refractory materials. The construction work can be significantly streamlined. Moisture content in amorphous refractories
Is 2 to 8% by weight, and
Therefore, it is possible to prevent clogging in the spray nozzle and the transfer pipe.
At the same time, the strength and corrosion resistance are not deteriorated. Indefinite
The conveying pressure in the form refractory and 10~100kgf / cm ²
Therefore, when spraying from the spray nozzle, the sprayed particle agglomerates
Quality can be prevented, and quality such as the density of the sprayed construction body can be prevented.
While maintaining good characteristics, it can be used as a transport pump or
The load on the transfer equipment such as transfer pipes is reduced, and the maintainer
Cost can be reduced. Amorphous amount of curing accelerator added
3 to 13% by weight of the amount of hardener added in the refractory
With the proper amount, maximum acceleration of curing can be expected. Irregular fire resistance
The the spray pressure of the object is set to 4~10kgf / cm ²
Prevents rebound loss while ensuring sufficient spraying capacity.
You can stop .

In particular, in the case of a steelmaking plant, the content of the construction needs of the irregular refractory at each irregular refractory construction site,
That is, the required composition of the irregular refractory material is significantly different, and the amount of the irregular refractory material used is relatively small in the case of repair, but a large amount of the irregular refractory material may be required as in the case of full-scale construction. . In the present embodiment, since the construction material kneading equipment is a centralized type, it is possible to easily follow up even with a large capacity. That is, since the irregular refractory construction system can intensively produce the irregular refractory in the construction material kneading facility, it can easily handle both repair and construction. That is, not only the local repair of the refining vessel but also the construction of a new furnace and a wide range of repairs are possible, and the application range of the amorphous refractory can be expanded. In addition, since the irregular refractory construction system can produce irregular refractory in a concentrated manner with the construction material kneading equipment, the construction materials can be uniformly kneaded and variations in moisture, curing agent, etc. can be eliminated. The quality of can be improved.

In the irregular refractory construction system in the ironmaking plant according to claim 2, the construction schedules of plural irregular refractory construction sites arranged in the ironmaking plant, the irregular refractory, and the usage amount thereof are Based on each information, the required amount of each amorphous refractory is lot-organized into an amorphous refractory containing carbon and an amorphous refractory containing no carbon,
The order of kneading is to give priority to carbon-free amorphous refractories. Therefore, each steelmaking plant A
Amorphous refractory required from, depending on the product type, an amorphous refractory containing no carbon, for example, SiC, Mg
If the carbon-containing amorphous refractory such as C or carbon is lot-organized and the amorphous refractory containing no carbon such as Al ₂ O ₃ or MgO is kneaded first, the kneading equipment is cleaned and the fireproofing is performed. Material loss and the like can be reduced and deterioration of the quality of the kneaded product can be suppressed.

In the irregular refractory construction system in the steelmaking plant according to the third aspect , the construction material is conveyed from the construction material kneading equipment to the irregular refractory construction site by the transport vehicle equipped with the mixer. Therefore, it is possible to reliably prevent the amorphous refractory from hardening during the transportation from the construction material kneading equipment to the irregular refractory construction site. In the irregular refractory construction system in the steel manufacturing plant according to claim 4 , the construction material is transported from the construction material kneading facility to the irregular refractory construction site by a carrier vehicle equipped with a container. It is expensive to transfer the irregular refractory from the construction material kneading equipment to the irregular refractory construction site while preventing the irregular refractory from hardening in the container by adding the delay modifier to the irregular refractory. You do n’t need a mixer,
It is possible to reduce the equipment cost of the irregular refractory construction system.

In the irregular refractory construction system in the steel manufacturing plant according to claim 5 , since the carrier vehicle is equipped with a pressure pump, it is not necessary to install a pressure pump at each irregular refractory construction site. Therefore, it is possible to reduce the equipment cost of the irregular refractory construction system. Claim 6
In the irregular refractory construction system in the steel plant described, in the irregular refractory construction site, the discharge port of the pressure pump mounted on the carrier is detachably connected to the base of the spray pipe by a coupling. There is. Therefore, it is possible to quickly perform the work of spraying the irregular refractory from the carrier vehicle to the site of the irregular refractory construction, and to promptly perform the irregular refractory construction work.

[Brief description of drawings]

FIG. 1 is a conceptual configuration explanatory diagram showing an overall configuration of an irregular refractory construction system in an iron manufacturing plant according to an embodiment of the present invention.

FIG. 2 is a front view of a construction material kneading facility.

FIG. 3 is a side view of the same.

FIG. 4 is a side view of a carrier vehicle.

FIG. 5 is an explanatory diagram in the case where the irregular refractory construction system in the ironmaking plant according to the present invention is applied to the mixed piggy car, which is an example of the irregular refractory construction site.

FIG. 6 is an explanatory diagram when the irregular refractory construction system in the steel plant according to the present invention is applied to a gutter, which is an example of an irregular refractory construction site.

FIG. 7 is a side view illustrating a case where the amorphous refractory construction system in the ironmaking plant according to the present invention is applied to a converter which is an example of an irregular refractory construction site.

FIG. 8 is an explanatory view of the same plane.

FIG. 9 is an explanatory diagram when the amorphous refractory construction system according to the present invention is applied to a CAS dip pipe, which is an example of an irregular refractory construction site.

FIG. 10 is an explanatory diagram of a kneading / construction method for a conventional irregular refractory material at a construction site for irregular refractory materials.

[Explanation of symbols]

A: Steelmaking plant, a: PC communication, b: PC communication, 10: converter, 11: gutter, 12: ladle, 13: piggy wheel, 14: CAS dip pipe, 15: construction material kneading equipment, 1
6: mixer, 17: pressure pump, 18: carrier, 1
9: Raw material manufacturer, 20: Floor surface, 21: Building support, 2
2: Upper horizontal frame, 23: Middle horizontal frame,
24: lower horizontal frame, 24a: dust collector, 24
b: first dust collecting duct, 24c: second dust collecting duct, 25:
Traveling rail, 26: lifting crane, 27: reversing device, 2
8: Traveling cart, 29: Hopper, 30: Hopper, 3
1: Hopper, 32: Cutting gate, 33: Cutting gate, 34: Cutting gate, 35: Shoot, 3
6: Shoot, 37: Shoot, 38: Mixer, 38
a: Automatic water weighing device, 38b: Hardener tank, 38c:
Delay adjusting agent tank, 39: chute, 40: carrier entry space, 41: auxiliary building support, 42: container lifting space,
43: container entry space, 44: container stock yard, 44a: lifter, 45: container, 46: cargo bed,
47: Auxiliary platform, 48: Flexible hose, 49: Spray pipe, 49a: Cure accelerator injection pipe, 49b: Cure accelerator supply device, 49c: Compressor, 49d: Cure accelerator tank, 49e: Spray nozzle, 50: Cup Ring, 51: tap hole, 52: traveling carriage, 53: base arm, 54: articulated arm, 55: motor, 56: motor, 57: motor, 58: motor, 59: motor, 6
0: Arm member, 61: Arm member, 62: Arm member, 63: Arm member, 64: Arm member, 65: Motor, 66: Spray pipe, 67: TV camera device, 6
8: driver's cab, 69: monitor device, 70: internal space, 7
1: traveling carriage, 72: turning table, 72a: flexible hose, 73: raising / lowering arm, 74: discharge part, 75:
Spray pipe, 76: traveling carriage, 77: turning table, 7
8: Pipe support arm, 79: Discharge part, 80: Spray pipe, 81: Lift table, 82: Pipe support cylinder, 83:
Upper pipe, 84: Lower pipe, 85: Spray pipe, 86:
Rotary joint, 87: rotary joint

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F27D 1/16

Claims (6)

(57) [Claims] 1. An irregular refractory construction system in an iron manufacturing plant, wherein a plurality of irregular refractory construction sites arranged in an iron manufacturing plant can construct irregular refractory. A kneading facility is provided, and 2 to 8% by weight of water and a curing agent are added to the construction material required by each of the irregular refractory construction sites in the construction material kneading facility.
The kneaded product obtained by kneading and conveying said each irregular-sized refractory construction site added, the kneaded product in the respective castable refractory construction site
Transport of 10 to 100 kgf / cm ² as irregular refractory
The inside of the transfer pipe is pressure-fed, and the tip of the transfer pipe is
In the amorphous refractory in the spray nozzle provided in the
Add 3 to 13% by weight of curing accelerator to the amount of the additive
Then , the construction body is constructed with a spray pressure of 4 to 10 kgf / cm ^2.
An irregular refractory construction system in a steel plant characterized by spraying on the surface . 2. The irregular refractory material based on each of the plurality of irregular refractory construction site construction schedules arranged in the steelmaking plant, the irregular refractory, and information on the amount of use thereof. The required amount of the carbon-containing amorphous refractory and the carbon-free amorphous refractory are lot-organized, and the kneading order is prioritized in the carbon-free amorphous refractory. The irregular refractory construction system for a steel plant according to claim 1. Wherein the construction material, the transport vehicle equipped with a mixer, claim 1 also characterized in that it is transported to the monolithic refractory construction site from the construction material kneading equipment
Is an irregular refractory construction system for a steel plant according to 2 . Wherein said construction material is the transport vehicle equipped with a container, according to claim 1 also characterized in that it is transported to the monolithic refractory construction site from the construction material kneading equipment
Is an irregular refractory construction system for a steel plant according to 2 . 5. A monolithic refractory construction system in steel plant according to claim 3 or 4, wherein the transport vehicle is characterized by mounting a pressure pump. In wherein said castable refractory construction site, the discharge port of the feed pump mounted on the transport vehicle, claims, characterized in that it is detachably communicatively connected by coupling the base of the spray pipe Item 5. An irregular refractory construction system in an ironmaking plant according to Item 5 .