JP5609038B2 - Refractory construction apparatus, refractory construction method, and refractory - Google Patents

Description

  The present invention relates to a refractory construction apparatus, a refractory construction method, and a refractory.

In smelting containers such as converters and ladles, refractories are constructed inside to withstand high-temperature molten steel.
However, since the refractory constructed inside is gradually worn out by the molten steel, after a certain period of time has elapsed after the operation, the worn refractory must be removed and a new refractory must be constructed.
As a refractory construction apparatus for such a refining vessel, for example, a tower is arranged from the furnace bottom in the trunk circumferential center of the converter furnace body to the top of the furnace body, and the work deck and cage can be moved up and down on the tower. There is known an apparatus in which a link is disposed along the wall of the converter furnace at the upper and lower portions of the work deck, and a furnace building robot is detachably and rotatably provided on the link (for example, Patent Documents). 1).

Moreover, as a method of carrying a brick stacker and a furnace bottom exchanger into the lower part of the furnace bottom exchange type converter, a brick stacker and a furnace bottom exchanger that can move on a rail for a steel receiving carriage are placed on the rail. A process, a step of connecting a brick stacker and a furnace bottom exchanger in this order with the steel receiving cart at the top, and a step of bringing the brick stacker and the furnace bottom exchanger into the lower part of the converter by the steel receiving cart. A method for carrying in bricks has also been proposed (see, for example, Patent Document 2).
Furthermore, a plurality of telescope type cylinders are erected on the lower fixed member, and an upper movable member is provided on the telescope type cylinder so as to be able to be pushed up, and a loop provided with a brick carrier between the lower fixed member and the upper movable member A brick conveying means constituted by a chain-like chain is mounted, and a chain feeding means for changing the length of the loop-shaped chain along the cylinder is attached to the brick conveying means following the telescopic operation of the telescopic cylinder. A brick transport device for brick stackers has been proposed (see, for example, Patent Document 3).

JP-A-10-204518 JP-A-8-60222 Japanese Utility Model Publication No. 5-59194

However, in the techniques disclosed in Patent Documents 1 to 3, since the converter is brought upright and bricks at a level that can be handled by human power from the furnace top or bottom are sequentially carried into the furnace, There is a problem like this.
(1) Since large bricks exceeding 100 kg / piece cannot be taken in, the efficiency of taking bricks into the furnace per unit time is low, and brick placement (construction) of the entire converter cannot be performed quickly.
(2) Since manual work remains in the furnace, labor saving cannot be achieved, and work efficiency is reduced. Programming is necessary and complicated when changing the material for each worn part.
(3) The work inside the furnace and the work at the top of the furnace cannot be wrapped.
(4) Because the bricks are piled by human power, the size of one brick cannot be increased and the joints on the construction wall surface increase, so that molten steel and hot metal can easily penetrate into the joints. It is difficult to reduce the wear of the refractory due to the peeling phenomenon caused by the thermal stress of the part.

The object of the present invention is to solve such a problem, and the refractory in the converters that can automatically and accurately perform the brick placement of the smelting vessel rapidly. The object is to provide a construction apparatus, a construction method for a refractory, and a refractory.
Another object of the present invention is to provide a refractory construction apparatus, a refractory construction method, and a refractory that can reduce the wear rate by reducing the joints between the refractories.

The gist of the present invention is as follows.
(1) A refractory construction apparatus for constructing a refractory in which an inner surface is covered with a connecting plate and adjacent members are connected to each other inside a substantially cylindrical refining vessel,
A refractory holding mechanism for holding the refractory with a male screw portion inserted into the hole of the connecting plate;
An axial movement mechanism for moving the refractory held by the refractory holding mechanism along the axis of the cylinder of the smelting vessel;
A radial movement mechanism for moving the refractory held by the refractory holding mechanism in the radial direction of the smelting vessel;
A refractory construction apparatus, comprising: a turning mechanism that moves the refractory held by the refractory holding mechanism along a circumferential direction of an inner surface of the smelting vessel.

(2) inside a substantially cylindrical refining vessel, a method of installing refractory inner surface to applying a refractory material adjacent ones are connected with covered and the connecting plate by a connecting plate,
A refractory holding mechanism for holding the refractory with a male screw portion inserted into the hole of the connecting plate;
An axial movement mechanism for moving the refractory held by the refractory holding mechanism along the axis of the cylinder of the smelting vessel;
A radial movement mechanism for moving the refractory held by the refractory holding mechanism in the radial direction of the smelting vessel;
Using a refractory construction apparatus provided with a turning mechanism for moving the refractory held by the refractory holding mechanism along the circumferential direction of the inner surface of the smelting vessel,
Holding the refractory with the refractory holding mechanism;
Moving the refractory held by the refractory holding mechanism along the cylindrical axis of the smelting vessel by the axial movement mechanism;
Moving the refractory held by the refractory holding mechanism along the circumferential direction of the inner surface of the smelting vessel by the turning mechanism;
After the refractory held by the refractory holding mechanism is moved in the radial direction of the refining vessel by the radial movement mechanism, and the step of installing inside the refining vessel is performed by the refractory construction apparatus,
Said connecting plate of the installed refractory, construction method of refractory material and said connecting plate of the refractory refractories located adjacent to, which comprises carrying out the step of connecting a connecting member.

(3) In the construction method of the refractory according to (2),
The refractory includes a refractory body formed by dividing a ring-shaped refractory construction surface along the circumferential direction of the smelting vessel into a plurality of circumferential directions, and a metal that covers an inner surface of the refractory body. construction method of the refractory, characterized in that the manufacturing of the connecting plate Bei Eteiru.
(4) In the construction method of the refractory according to (3),
The connecting plate is formed with a connecting piece projecting from a circumferential end of the refractory body on either one of the circumferential ends of the refractory body,
The refractory construction method, wherein the connector is a bolt and a nut that fasten respective connection plates of adjacent refractories.

(5) In the refractory construction method described in (3),
The connector includes a pin which projects out of plane direction of the connecting plate of an adjacent one of said refractory, and a hook provided rotatably to the connecting plate of the adjacent other of said refractory,
The step of connecting the refractory adjacent to the construction method of the refractory, characterized by engaging the hook on the pin.

(6 ) A refractory constructed in a substantially cylindrical refining vessel by the refractory construction method according to any one of (2) to (5) ,
The refractory is a ring-shaped refractory construction surface along the circumferential direction of the smelting vessel, the refractory body divided into a plurality of circumferential directions,
Refractory, characterized by comprising a connecting plate having the refractory insertable hole the male threaded portion of Ikatsu the refractory holding mechanism covering the inner surface of the main body.

According to the refractory construction apparatus of the present invention, when lining a refractory such as a converter or a ladle, the unit of the refractory is increased to reduce the work of loading bricks into the furnace. Construction work can be reduced, and the lining refractory inside the refining vessel can be quickly constructed.
Conventionally, converter refractories have been lined with MgO-C bricks at open joints, so the wear forms are thermal melts with chemical melting wear due to high temperature slag penetration into joints and rapid temperature fluctuations. Wear due to poling and flow of hot molten metal is complicated and leads to wear.
As a MgO-C brick structure used under such harsh conditions, the size and mass are expanded to the upper limit of mass that can be handled by the furnace as a means to overcome the problem of manpower load during the furnace construction. By doing so, the number of brick joints can be reduced, and a longer life can be achieved by reducing the wear rate.

The schematic diagram explaining the state by which the refractory construction apparatus which concerns on 1st Embodiment of this invention was inserted in the converter. The front view showing the structure of the refractory construction apparatus in the said 1st Embodiment. The side view showing the structure of the refractory construction apparatus in the said 1st Embodiment. The perspective view showing the connection structure of the refractories in the said 1st Embodiment. The perspective view showing the connection structure of the refractories used as the deformation | transformation of the said 1st Embodiment. The schematic diagram for demonstrating the procedure of the construction method of the refractory material in the said 1st Embodiment. The schematic diagram for demonstrating the procedure of the construction method of the refractory material in the said 1st Embodiment. The schematic diagram for demonstrating the procedure of the construction method of the refractory material in the said 1st Embodiment. The schematic diagram for demonstrating the procedure of the construction method of the refractory material in the said 1st Embodiment. The schematic diagram for demonstrating the procedure of the construction method of the refractory material in the said 1st Embodiment. The schematic diagram for demonstrating the procedure of the construction method of the refractory material in the said 1st Embodiment. Sectional drawing showing the connection structure in the construction method of the refractory material which concerns on 2nd Embodiment which is not included in this invention. The partial exploded perspective view showing the construction structure of the refractory in the said 2nd Embodiment. The fragmentary perspective view showing the construction method of the last refractory in the said 2nd Embodiment. Sectional drawing showing the connection structure in the construction method of the refractory material which concerns on 3rd Embodiment which is not included in this invention. The schematic diagram showing the construction method of the refractory used as the deformation | transformation of the said 1st Embodiment.

The refractory construction apparatus of the present invention includes a refractory holding mechanism, an axial movement mechanism, a radial movement mechanism, and a turning mechanism.
The refractory holding mechanism is a mechanism for holding the inner surface of the refractory, and has a male screw formed at the tip, and the female screw formed on the inner surface of the refractory by inserting the male screw into the hole of the connecting plate. The refractory can be held by being screwed to the portion, and the refractory can be raised and lowered by a manual or hydraulic actuator or the like.
Further, this refractory holding mechanism can be added with a mechanism that can adjust the posture of the refractory when the refractory is installed.
The axial movement mechanism is a mechanism for moving the refractory held by the refractory holding mechanism along the cylindrical axial direction of the smelting vessel, and a hydraulic actuator can be used.
The radial movement mechanism is a mechanism for moving the refractory held by the refractory holding mechanism in the radial direction of the smelting vessel, and a hydraulic actuator can be used.
The swivel mechanism is a mechanism that moves the refractory held by the refractory holding mechanism along the circumferential direction of the inner surface of the smelting vessel.For example, a ring-shaped frame formed with an inner gear and a rotating shaft The structure provided with the rotation motor with which the pinion gear meshed | engaged with a ring-shaped flame | frame can be employ | adopted.

The refractory construction method of the present invention uses a refractory construction apparatus having the above-described configuration,
Gripping the refractory with the refractory holding mechanism;
Moving the refractory held by the refractory holding mechanism along the cylindrical axis of the smelting vessel by the axial movement mechanism;
Moving the refractory held by the refractory holding mechanism along the circumferential direction of the inner surface of the smelting vessel by the turning mechanism;
A step of moving the refractory held by the refractory holding mechanism in the radial direction of the smelting vessel by the radial direction moving mechanism, and installing the refractory inside the smelting vessel;
The step of connecting the installed refractory and the refractory installed adjacent to the refractory is performed.

  In the case where bricks are stacked by conventional human power, the mass per brick must be limited to about 35 kg / piece because it is handled by human power, but according to the construction method of the present invention, it is about 500 kg / piece. Or more than that becomes possible, Furthermore, automation and efficiency of construction work can be aimed at by using a refractory construction apparatus. Moreover, the number of joints between refractories can be made into 1/10 or less of the past by making the refractory which is a construction unit into about 500 kg / piece or more. As a result, it is possible to suppress the occurrence of a peeling phenomenon called peeling caused by penetration of molten steel and hot metal into the joint portion and thermal stress at the joint corner portion.

In the present invention, the refractory includes a refractory main body formed by dividing a ring-shaped refractory construction surface along a circumferential direction of the smelting vessel into a plurality of circumferential directions, and an inner portion of the refractory main body . and a metal connecting plate covering the side surfaces, the step of connecting the refractory adjacent preferably coupling the coupling plate by a connecting member.
Here, the connector, when the connecting plate, connecting piece projecting from the circumferential end portion of the refractory body in one of the circumferential end portion of the refractory body is formed, For example, it is possible to employ bolts and nuts that connect the connecting plates of adjacent refractories.
As another connecting member, it is employed which comprises a pin which projects out of plane direction of the connecting plate of one of the refractory in contact next, and a hook provided rotatably to the connecting plate of the other adjacent The step of connecting adjacent refractories can be performed by engaging the hook with the pin.

According to these inventions, by connecting the refractories constructed by the refractory construction apparatus with the coupler, the refractories after construction can be reliably held on the construction surface. It is possible to shift to the construction of the construction and to speed up the construction.
In particular, since the refractories can be easily and quickly connected by using bolts, nuts, pins, and hooks as the connecting tool, the construction work can be simplified.
Incidentally, these consolidated plate, since the coupling as a metal such as iron, but will melt in the molten steel during operation of the converter, steel shell inner surface of the refractory by molten steel heat thermally expanded converter Therefore, there will be no problems during operation.

Although not included in the present invention , in the step of connecting adjacent refractories, a hole is formed in advance in one end face of the adjacent refractory, and the end face of the other refractory is formed. an insertable rod-like body into the hole provided in advance, it is also possible to connect adjacent refractory by inserting the rod-like body into the hole in the.
According to this configuration, as compared to the connecting structure between the refractory having a connecting plate described above, coupling plate, for coupling is not required, it is possible to reduce the manufacturing cost of the refractories.

Although not included in the present invention , in the step of connecting adjacent refractories, the adjacent refractories are connected by providing a sheet-like body having adhesiveness between both ends of the adjacent refractories. You can also
Here, as the sheet-like body having adhesiveness on both sides, an inorganic adhesive such as mortar was applied to the front and back surfaces of a base material sheet such as a non-woven fabric or the like adhesive sheet having adhesiveness on both sides A sheet-like mortar, a building material in which a pressure-sensitive adhesive is applied to the front and back surfaces of a base sheet, and a double-sided tape for construction can be employed.
According to this structure , since a connection structure can be formed without processing the refractory at all, the manufacturing cost of the refractory can be further reduced.

The refractory of the present invention is
It is a refractory constructed inside a substantially cylindrical refining vessel,
The refractory is a refractory body formed by dividing a ring along the circumferential direction of the smelting vessel into multiple pieces in the circumferential direction;
It is obtained by a coupling plate having the refractory insertable hole the male threaded portion of Ikatsu the refractory holding mechanism covering the inner surface of the main body.
If it is such a refractory, it can be used suitably for the construction method of the refractory mentioned above, and it can contribute to speeding up and simplification of construction work.

[Embodiment of the Invention]
(First embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a state in which a refractory block 3 as a refractory is being constructed on the inner surface of an iron skin 2 of a converter 1 according to an embodiment of the present invention.
In the present embodiment, the refractory block 3 is constructed in a state where the converter 1 is tilted to the front side of the furnace 1 by utilizing the space before the converter 1 and the tilting function of the converter 1.
The construction of the refractory block 3 is performed by the refractory construction apparatus 4 that is inserted into the converter 1 while the bottom where the converter 1 can be opened is opened. In addition, the refinement container which can be constructed with the refractory construction apparatus 4 of the present invention is not limited to the converter 1, and any type can be used as long as it is a substantially cylindrical refining container such as a ladle.

2 and 3 show the structure of the refractory construction apparatus 4. FIG. 2 is a front view of the refractory construction apparatus 4 as viewed from the axial direction of the cylindrical body of the converter 1, and FIG. 3 is a side view of the refractory construction apparatus 4.
The refractory construction apparatus 4 is installed inside the converter 1 and is installed on the inner surface of the iron shell 2 of the converter 1 by performing swivel movement, axial movement, and radial movement while holding the refractory block 3. As shown in FIGS. 2 and 3, a turning mechanism 5, a radial movement mechanism 6, an axial movement mechanism 7, and a refractory holding mechanism 8 are provided.

The turning mechanism 5 is a mechanism that moves the fireproof block 3 in the circumferential direction of the inner surface of the converter 1 around the cylindrical center of the substantially cylindrical converter 1, and includes a ring frame 51, a support roller 52, a rotary motor 53, And a counterweight 54.
The ring frame 51 is a ring-shaped steel frame, and an inner gear is formed on the inner peripheral edge of the ring.
A plurality of support rollers 52 are fixed to the inner surface of the iron shell 2 of the converter 1 and support the ring frame 51 in the converter 1 so as to be rotatable.

The rotation motor 53 is a hydraulic drive device that rotates the ring frame 51. A gear is provided on the drive shaft of the rotation motor 53, and this gear meshes with the inner gear of the ring frame 51. When driven, the ring frame 51 rotates about the cylindrical center of the converter 1 as an axis.
The counterweight 54 is provided on the substantially opposite side of the refractory holding mechanism 8 with the rotation center of the ring frame 51 as the center, and functions as a weight balance when the refractory holding mechanism 8 holds the refractory block 3.

The radial direction moving mechanism 6 is a mechanism for moving the refractory block 3 held by the refractory holding mechanism 8 in the cylindrical radial direction of the converter 1. The radial direction moving mechanism 6 is provided on the turning mechanism 5 and has a hydraulic cylinder 61 and a support arm 62. Prepare.
Two hydraulic cylinders 61 are provided on the ring frame 51 of the turning mechanism 5 at diametrical positions around the rotation center of the ring frame 51.
The support arm 62 includes a pair of sliding portions arranged substantially in parallel, and an arm portion that connects the ends of the pair of sliding portions in a substantially semicircular shape and is provided with the axial movement mechanism 7. As the two hydraulic cylinders 61 slide the sliding portion, the support arm 62 slides in the direction of the cylindrical radius of the converter 1. The shape of the support arm 62 is not limited to this, and an asymmetric one-arm type or a link type can be employed.
The axial movement mechanism 7 is a mechanism for moving the refractory block 3 held by the refractory holding mechanism 8 in the axial direction of the cylinder of the converter 1, and at the radial end of the cylinder of the support arm 62 of the radial movement mechanism 6. The hydraulic cylinder 71 is provided.

The refractory holding mechanism 8 is a mechanism for holding the refractory block 3, and is provided at the axial end of the cylindrical portion of the converter 1 of the axial movement mechanism 7, and includes a center pin 81, a rolling jack 82, and a holding cylinder 83. And a holding plate 84.
The center pin 81 is attached to the approximate center of the refractory block 3 by screwing or the like, and is a portion that supports the load of the refractory block 3. The center pin 81 is connected to the tip of the center pin 81 via a rotatable joint such as a universal joint. A male screw portion is provided.
The rolling jack 82 is a part that finely adjusts the posture of the fireproof block 3 by pushing or pulling the fireproof block 3 from the back when the fireproof block 3 is installed, and is configured by a manual hydraulic cylinder.

The holding cylinder 83 is a part that holds the end of the fireproof block 3, and, like the center pin 81, a male screw portion is provided at the tip of the holding cylinder 83 via a rotatable joint such as a universal joint. ing.
The holding plate 84 is a side L-shaped plate-like body and supports the load of the fireproof block 3 in a vertical state.

Various hydraulic actuators, hydraulic motors, and the like are used for the turning mechanism 5, the radial movement mechanism 6, the axial movement mechanism 7, and the refractory holding mechanism 8 described above. A design that takes into account force, rotational force, rotational speed, radial moving speed, axial moving distance force, and speed is required.
The holding force of the refractory holding mechanism 8 can lift the held refractory block 3 when the refractory block 3 is assembled, push the refractory block 3 outward, and further adjust the position of the constructed refractory block 3. You need power that can.
In general, it is desirable that the pushing force be equal to or greater than the mass of one ring of the refractory block 3. This is because the position of the entire fireproof block 3 that has been installed is adjusted to ensure a space for pushing in the new fireproof block 3.
The lifting force is generally set to 1.5 to 2 times the maximum piece mass of the refractory block 3 in consideration of the safety factor with respect to moments and the like acting during turning and movement.
In addition, since a slurry etc. may be filled and sealed between the constructed fireproof block 3 and the iron skin 2 or between the fireproof blocks 3, the holding of the fireproof block 3 of the refractory holding mechanism 8 may be performed. The structure needs to be a structure that can withstand the pressure at the time of press-fitting.

The turning force of the turning mechanism 5 must hold the largest piece of the fireproof block 3 and be able to rotate easily even when the radial movement mechanism 6 is at the maximum stroke and can be locked when stopped.
The rotational speed of the turning mechanism 5 may be controlled in two steps of fine speed and high speed in consideration of work efficiency. In this case, the peripheral speed is generally about 250 to 400 mm / sec at a high speed and about 10 to 50 mm / sec at a low speed.

About the radial direction speed | velocity | rate of the radial direction moving mechanism 6, about 50-200 mm / sec is desirable at the speed | rate which expands-contracts in the radial direction of a kiln equipment.
The axial movement distance of the axial movement mechanism 7 is preferably about 150 to 300 mm, which is the distance by which the fireproof block 3 can be moved in the cylindrical axis direction of the converter 1 when the fireproof block 3 is assembled.
The additional capability of the assembling apparatus can be added with the ability to control each of the above forces and speeds by a control mechanism (such as a hydraulic servo) or an assembling method. A hydraulic cylinder or hydraulic motor used for each part of the refractory construction apparatus 4 has a hydraulic pressure of about 10 MPa to 20 MPa.

The fireproof block 3 used in the present invention is composed of a metal frame for fixing on the working surface side (inner side surface of the converter 1) when used in order to fix each fireproof block 3 at the time of building. It has a structure provided with a connecting plate 32.
Specifically, as shown in FIG. 4, the refractory body 31 and the connecting plate 32 are provided.
The refractory body 31 has a block shape in which a ring-shaped refractory construction surface along the circumferential direction of the converter 1 is divided into a plurality of portions in the circumferential direction, and is usually magnesia sintered or used as a brick material. A non-fired magnesia-graphite that is pre-dried by kneading and mixing electromelting clinker and scaly graphite as raw materials, an organic binder, and metal powder is used.
In addition, for the size exceeding the upper limit of the molding machine, the block manufactured with the upper limit size of the molding machine is pre-bonded to make a large block, or it is hydraulic with magnesia sintered or electrofused clinker and scale graphite as raw materials. You may apply what made the large-sized pre-cast block with the irregular casting material using a binder, a dispersing agent, etc.

The connecting plate 32 is made of a steel plate or a lath net considering the overall mass balance, and is fixed to the working surface side of the refractory body 31 with an organic adhesive.
A connecting piece 33 for connecting adjacent refractory blocks 3 is formed at the circumferential end of the connecting plate 32 so as to protrude from the circumferential end of the refractory body 31, At the time of construction, it overlaps with the connecting plate 32 of the adjacent fireproof block 3. A plurality of holes 34 are formed in the connecting piece 33, and bolts 35 are inserted into the holes 34, and the connecting plates 32 are connected to each other by fastening with nuts (not shown) arranged on the back surface. The fireproof blocks 3 are connected to each other.

Note that the structure of the fireproof block 3, particularly the connection structure, is not limited to this. For example, as shown in FIG. 5, the pins 36 are arranged in the outward direction of the inner surface of the connection plate 32 of one fireproof block 3. A hook 37 may be attached to the connecting plate 32 of the other refractory block 3 which is protruded, and the hook 37 is engaged with the pin 36 at the time of connection.
The purpose of providing such connectors 35 to 37 is to set the large fireproof block 3 at a predetermined position and fix it, and to connect the fireproof blocks 3 to each other. Once the construction of all the refractory blocks 3 is completed, the connecting plate 32, the connecting piece 33, and the connecting tools 35 to 37 are melted by heating and receiving and become disposable.

Next, the construction procedure of the refractory block 3 by the refractory construction apparatus 4 described above will be described with reference to FIGS.
First, for transporting the refractory block 3 to the in-furnace installation position of the converter 1, the refractory block 3 temporarily placed in the stock yard of the refractory block 3 is transported to the in-furnace installation position by a transport carriage in an expansion tube with a battery locomotive. To do.
Thereafter, the fireproof block 3 transported to the set position of the fireproof block 3 is loaded into the supply device of the fireproof block 3 by the crane in the telescopic pipe and moved to a position where the fireproof construction apparatus 4 can hold it.

When the installation of the refractory block 3 in the furnace is completed, as shown in FIG. 6, the refractory block 3 to be constructed is placed on the already constructed refractory block 3, and the center of the refractory holding mechanism 8 described above is arranged. The pin 81 and the male thread portion of the holding cylinder 83 (reference numerals omitted in FIGS. 6 to 10) are inserted into the holes of the connecting plate 32 of the fireproof block 3 and fastened with nuts to hold the fireproof block 3.
Next, as shown in FIG. 7, the axial movement mechanism 7 is operated to move the fireproof block 3 to be constructed in the axial direction of the cylinder of the converter 1 (the front side in the direction orthogonal to the paper surface).

And as FIG. 8 shows, the turning mechanism 5 is operated and the fireproof block 3 is turned to a desired construction position.
When the fireproof block 3 is turned, as shown in FIG. 9, the radial movement mechanism 6 is operated to move the fireproof block 3 to the construction position. At this time, the posture of the fireproof block 3 is adjusted while operating the rolling jack 82 (reference numerals omitted in FIGS. 6 to 10) of the fireproof material holding mechanism 8, and the fireproof block 3 is guided to an appropriate position.

When the installation of the refractory block 3 is completed, the holding cylinder 83 of the refractory holding mechanism 8 is removed as shown in FIG.
Next, the connection plates 32 of the adjacent fireproof blocks 3 are fastened with bolts 35 and nuts to connect the fireproof blocks 3 (see FIG. 4).
And every time the refractory block 3 is installed, a filler is pressed into the gap between the back surface and the refractory block 3. The filler press-fitting pump is preferably a double piston type pump with high pumping pressure, and may be provided integrally with the refractory construction apparatus 4.

Thereafter, this is repeated, and the refractory blocks 3 are sequentially constructed in the circumferential direction of the converter 1. However, considering the shape of the refractory block 3 with respect to the last one, the refractory block 3 cannot be moved and inserted from the circumferential direction. Therefore, as shown in FIG. Insert fireproof block 3 from the direction.
Such a refractory block 3 is composed of 9 to 10 rings (about 3.7 to 8.5 t / piece per ring) as one construction unit, which means a reduction in construction efficiency and number of joints. It is preferable for achieving the object of the present invention.

(Second Embodiment)
Next, a second embodiment not included in the present invention will be described. In the following description, parts that have already been described are assigned the same reference numerals and description thereof is omitted.
In the first embodiment described above, adjacent refractory blocks 3 are provided with a connection plate 32 on the operating surface side of the refractory body 31, and the connection piece 33 of the connection plate 32 of one refractory block 3 and the other refractory block 3. The connecting plate 32 is connected by fastening with a bolt 35.
On the other hand, as shown in FIG. 12 and FIG. 13, the refractory blocks 9 of the present embodiment have one refractory block 9 (for example, already applied) at the end surfaces facing each other of the adjacent refractory blocks 9. A hole 91 is formed in the end face of the left refractory block 9) in FIG. 13, and a key brick 92 is provided on the end face of the other refractory block 9 (for example, the right refractory block 9 in FIG. 13). In addition, the key brick 92 is inserted into the hole 91 on the end face of one of the fireproof blocks 9 to be connected.

The holes 91 are formed at a plurality of locations on the end face of the refractory block 9, and considering the bending strength of the refractory block 9, the diameter is preferably 50 mm or more. The hole 91 may be formed by processing the end face of the fireproof block 9 with a drill or the like after the fireproof block 9 is manufactured, but at the time of manufacturing the fireproof block 9, a rod-shaped body is protruded from the inner surface of the mold, You may form simultaneously with shaping | molding of the fireproof block 9. FIG.
The key brick 92 functions as a connector for connecting adjacent fireproof blocks 9 and is composed of a rod-shaped body having a circular cross section. The material of the key brick 92 is the same as that of the fireproof block 9. The key brick 92 has a hole 91 formed in the end face of the other fireproof block 9, and a key brick 92 having an outer periphery coated with an adhesive is inserted into the hole 91 so that the other fireproof block 9 can be inserted into the other fireproof block 9. Can be fixed.
In addition, during construction, the hole 91 formed on the end face of the one fireproof block 9 is inserted with the adhesive applied to the outer periphery of the key brick 92 fixed to the other fireproof block 9. The connection strength between the fireproof blocks 9 is improved.
The material itself of the refractory block 9 is the same as that of the refractory body 31 of the first embodiment, and the construction method is the same as that of the first embodiment by the refractory construction apparatus 4 except for the step of connecting construction.

In this way, the fireproof blocks 9 are sequentially connected while connecting the fireproof blocks 9, but in the construction method of FIGS. 12 and 13, the last fireproof block 9 on the cylindrical construction surface is adjacent to the fireproof block 9. Cannot be consolidated.
Therefore, as shown in FIG. 14, the through-hole 93 is formed at an angle of about 45 degrees with respect to the end face of the fireproof block 9 that has already been constructed, and the end face in the cylindrical axial direction of the last fireproof block 9 ( A through-hole 93 penetrating the surface facing the adjacent fireproof block 9 is formed from the front end surface in the construction direction.
As in the case of the key brick 92, the key brick 94 having an outer periphery coated with an adhesive is inserted into the through-hole 93 for construction.
In addition, such a construction method of the fireproof blocks 9 may not be applied only to the last fireproof block 9, but may be adopted in the construction methods of all the fireproof blocks 9.

(Third embodiment)
Next, a third embodiment not included in the present invention will be described.
In 2nd Embodiment mentioned above, the hole 91 is formed in the mutually opposing end surface of the adjacent fireproof block 9, and the adjacent fireproof blocks 9 are connected by inserting the key brick 92 in each hole 91. FIG. It was.
On the other hand, in this embodiment, as shown in FIG. 14, adjacent refractory blocks 10 are connected to each other between the opposing end surfaces of the refractory blocks 10 with an adhesive sheet 11 interposed therebetween. The point is different.

The adhesive sheet 11 is preferably applied to the whole along the longitudinal direction of the end face of the refractory block 10 in consideration of adhesive strength and the like, but the adhesive sheet 11 is cut short and the end face of the refractory block 10 A plurality of places may be constructed at a predetermined pitch along the longitudinal direction. Examples of the adhesive sheet 11 include those obtained by applying a plastic adhesive such as chloropropylene synthetic rubber and phenolic resin to the front and back surfaces of the base sheet, or by extending these adhesives alone into a band shape. Not limited to, sheet-like mortar in which mortar is applied to the front and back surfaces of a base material sheet such as non-woven fabric, and construction and building material tape applied with acrylic pressure-sensitive adhesive on both sides of the tape base material, for example, products made by Sumitomo 3M Name beta tapes can be used.
The material of the refractory block 10 is the same as that of the refractory body 31 of the first embodiment, and the construction of the refractory is the same as that of the first embodiment by the refractory construction apparatus 4 except for the connecting step. Is the method.

(Modification of embodiment)
In the first embodiment described above, the construction of the refractory block 3 is performed by the refractory construction apparatus 4 in a state where the converter 1 is tilted approximately 90 degrees in the space in front of the furnace, but the refractory construction of the present invention is performed. The apparatus 4 is not limited to such a construction method.
That is, as shown in FIG. 15, a construction method is also possible in which the converter 1 is in an upright state and the refractory construction apparatus 4 is moved up and down in the vertical direction to stack the refractory blocks 3 from below. In this case, it is preferable to install the refractory construction apparatus 4 on the lifting mechanism 41.

After the 350t converter 1 is tilted and fixed at 90 degrees in front of the furnace as shown in FIG. 1 and the refractory construction device 4 of the present invention is installed on the side of the charging wall, the refractory block 3 with rails can be installed. The large refractory block 3 is installed sequentially from the bottom of the furnace using the refractory construction apparatus 4, and at the same time, the gap between the refractory block 3 and the iron skin is filled through the opening provided in the refractory block 3. While pressing the agent, the refractory construction apparatus 4 was moved backward to the furnace front side and the refractory block 3 was installed.
About the outgoing steel hole part, it installed accurately and quickly by installing the fireproof block with which the sleeve was already embed | buried. Table 1 below shows a comparison between the case where bricks are transported into the converter 1 by a brick transport device or the like and bricks are constructed by human power (comparative example) and the embodiment of the present invention.

According to Table 1, in the Example of this invention, it was confirmed that the construction time and the construction man-hour are significantly reduced, and the construction efficiency is extremely high.
The weight of the refractory block 3 was 420 kg / piece, which was much larger than that of the conventional one. As a result, the number of joints could be greatly reduced, and the wear rate index and lining life were greatly improved. doing. The wear rate index is a value obtained by dividing a numerical value obtained by dividing the wear size by the number of heats used, with the conventional comparative example as 100. The lining life is the number of actual operations of the converter 1 after the refractory block 3 or the conventional brick is applied to the inside of the converter 1 and the lining process is performed until the next lining process is required. .
Further, it was confirmed that even when the converter 1 was constructed in an upright state as shown in FIG.

  DESCRIPTION OF SYMBOLS 1 ... Converter, 2 ... Iron skin 3, 9, 10 ... Refractory block, 4 ... Refractory construction apparatus, 5 ... Turning mechanism, 6 ... Radial direction moving mechanism, 7 ... Axial direction moving mechanism, 8 ... Refractory holding Mechanism: 11 ... Adhesive sheet, 31 ... Refractory body, 32 ... Connection plate, 33 ... Connection piece, 34 ... Hole, 35 ... Bolt, 36 ... Pin, 37 ... Hook, 41 ... Lifting mechanism, 51 ... Ring frame, 52 ... Support roller, 53 ... Rotary motor, 54 ... Counter weight, 61 ... Hydraulic cylinder, 62 ... Support arm, 71 ... Hydraulic cylinder, 81 ... Center pin, 82 ... Rolling jack, 83 ... Holding cylinder, 84 ... Holding plate, 91 ... hole, 92, 94 ... key brick, 93 ... through hole

Claims (6)

A refractory construction apparatus for constructing a refractory in which an inner surface is covered with a connecting plate and adjacent ones are connected with the connecting plate inside a substantially cylindrical refining vessel,
A refractory holding mechanism for holding the refractory with a male screw portion inserted into the hole of the connecting plate;
An axial movement mechanism for moving the refractory held by the refractory holding mechanism along the axis of the cylinder of the smelting vessel;
A radial movement mechanism for moving the refractory held by the refractory holding mechanism in the radial direction of the smelting vessel;
A refractory construction apparatus, comprising: a turning mechanism that moves the refractory held by the refractory holding mechanism along a circumferential direction of an inner surface of the smelting vessel. Within a substantially cylindrical refining vessel, a method of constructing the refractory to each other that the inner surface be covered and adjacent connecting plates to the construction of the refractory which is connected by the connecting plate,
A refractory holding mechanism for holding the refractory with a male screw portion inserted into the hole of the connecting plate;
An axial movement mechanism for moving the refractory held by the refractory holding mechanism along the axis of the cylinder of the smelting vessel;
A radial movement mechanism for moving the refractory held by the refractory holding mechanism in the radial direction of the smelting vessel;
Using a refractory construction apparatus provided with a turning mechanism for moving the refractory held by the refractory holding mechanism along the circumferential direction of the inner surface of the smelting vessel,
Holding the refractory with the refractory holding mechanism;
Moving the refractory held by the refractory holding mechanism along the cylindrical axis of the smelting vessel by the axial movement mechanism;
Moving the refractory held by the refractory holding mechanism along the circumferential direction of the inner surface of the smelting vessel by the turning mechanism;
After the refractory held by the refractory holding mechanism is moved in the radial direction of the refining vessel by the radial movement mechanism, and the step of installing inside the refining vessel is performed by the refractory construction apparatus,
Said connecting plate of the installed refractory, construction method of refractory material and said connecting plate of the refractory refractories located adjacent to, which comprises carrying out the step of connecting a connecting member. In the construction method of the refractory according to claim 2,
The refractory includes a refractory body formed by dividing a ring-shaped refractory construction surface along the circumferential direction of the smelting vessel into a plurality of circumferential directions, and a metal that covers an inner surface of the refractory body. construction method of the refractory, characterized in that the manufacturing of the connecting plate Bei Eteiru. In the construction method of the refractory according to claim 3,
The connecting plate is formed with a connecting piece projecting from a circumferential end of the refractory body on either one of the circumferential ends of the refractory body,
The refractory construction method, wherein the connector is a bolt and a nut for fastening a connection piece and a connection plate of adjacent refractories. In the construction method of the refractory according to claim 3,
The connector includes a pin protruding in an out-of-plane direction of the connection plate of one of the adjacent refractories, and a hook rotatably provided on the connection plate of the other adjacent refractory,
The step of connecting the adjacent refractories to each other includes engaging the hook with the pin. A refractory constructed in a substantially cylindrical refining vessel by the refractory construction method according to any one of claims 2 to 5,
The refractory is a refractory body formed by dividing a ring-shaped refractory construction surface along the circumferential direction of the smelting vessel into a plurality of circumferential directions,
A refractory comprising a connecting plate that covers an inner surface of the refractory main body and has a hole into which a male screw portion of the refractory holding mechanism can be inserted.

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