JPH024774Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Field of Application] The present invention relates to a construction device for forming the lining of a molten metal reservoir such as a tundish for continuous casting. [Prior Art] In a continuous casting tandy in continuous casting equipment, a layer of lining material is generally first formed inside a can body forming an outer shell, and a lining is applied to the inside of the lining material layer. Conventionally, this lining material has been constructed using a bricklaying method, a method of pasting insulation boards, a method of troweling a monolithic refractory, a method of spraying a coating, and the like. Among these methods, the method of applying monolithic refractories on-site with a trowel or spraying with a spraying machine is as follows:
Compared to the long-established method of using ready-made molded materials such as bricks and insulation boards, this method is superior in terms of cost and construction of lining irregularly shaped tandy shells. However, since this method requires the monolithic refractory to contain moisture, it requires heating to completely dehydrate and dry it before starting casting, and this heating requires a huge amount of energy and time. A reduction was desired. In response to such demands, various non-aqueous monolithic refractories have been proposed, and, for example, a dry construction method using a thermosetting resin-based main binder has been used. This method includes (a) a device for supplying the non-aqueous monolithic refractory material mixed with the binder, (b) a formwork device for forming the desired lining shape, and (c) a device for dispensing the material throughout the tundish. A vibrating device was used to uniformly fill the material, and (d) a heating device was used to thermoset the material. In this way, each piece of equipment had a different function and the tundish was repeatedly installed and removed at each construction stage, which not only made the work complicated and inefficient, but also
It required a large work area to set up each piece of equipment, and furthermore, it was not possible to safely and reliably install the lining material due to mishandling during transportation of the tundish (collision of the tundish) and mistakes in adjustment between each piece of equipment. It is. [Problems to be solved by the invention] The present invention realizes an improved device that solves the problems during dry construction of forming the inner lining of a continuous casting tundish using such a non-aqueous monolithic refractory. The object of the present invention is to provide a dry construction device that can perform continuous and safe construction without impairing the three different functions (b) to (d) above. [Structure of the invention] According to the invention, a box-shaped outer shell having an outer shape opposite to a desired lining shape, an anchor frame that supports this outer shell from the inside, and a hot air blowing port at one end and a hot air blowing port at the other end. It consists of a formwork main body consisting of a top cover having an exhaust port, and an exciter provided on the top cover of the formwork main body, and hot air is introduced into and out of the hot air blowing port through an introduction pipe that can be attached and removed. Provided is an apparatus for forming a lining for a molten metal container, characterized in that it is equipped with a heating device for supplying molten metal. In other words, the most distinctive feature of the present invention is that the formwork body on which the vibration exciter is mounted is a formwork for forming the lining material in a homogeneous and desired shape;
The inside of this main body is a radiation heat transfer chamber (heating chamber) that supplies hot air for thermosetting the molded lining material, and the lining material is molded with the form body attached. The main feature is that it is equipped with a heating device that supplies hot air into the main body without moving the molten metal container (for example, a tundish) containing the material at all, and all of these are integrated. [Specific description of the invention] Figures 1 to 4 show examples of the invention, and based on these drawings, the configuration and operation of a device for applying lining material for a tundish for continuous casting will be further explained. Explain in detail. FIG. 1 is a schematic cross-sectional view in the long side direction showing a state in which a tundish lining material application device is attached to a tundish main body. FIG. 2 is a sectional view taken along the line A--A in FIG. 1 in the short side direction. Figure 3 is the first
It is a sectional view of the short side direction along the BB line of a figure.
FIG. 4 is a perspective view showing the anchor frame structure of the present invention. Note that the anchor frame structure is omitted in FIGS. 1 to 3. On the inside of the tundish can body 1, a lining 2 is formed of a refractory material such as castable. The lining material construction apparatus of the present invention is comprised of a form body 4 and a heating device 7. The form body 4 includes a box-shaped iron shell 15 that is separated from the lining 2 by the thickness of the lining material layer and has a desired external shape, and anchors that support the shell 15 from the inside. It consists of frames 13 and 14 and a top lid 16 that covers the top surface of a box-shaped outer shell 15. The upper cover 16 is provided with a support beam 11 on its upper surface and a vibrator 6 mounted thereon, while a layer of heat insulating material 17 is provided on its lower surface. Further, a hot air blowing port 9, which will be described later, is provided at one end of the upper lid 16, and an exhaust port 10 is provided at the other end. The outer shell 15 is provided with a guide spacer 1 for positioning the outer shell 15 in a fixed position so as to maintain a gap 3 corresponding to the thickness of the lining layer between the outer shell 15 and the layer of the lining material 2.
8 is provided. This guide spacer 18
is at least one on each side of the upper periphery of the outer shell 15.
It is usually desirable to provide six or more. The vibrator 6 may be of any type, such as a rotary electric vibrator or an electromagnetic vibrator, and at least one
2, preferably 2 or more. Next, the heating device 7 is placed on the work floor 19,
Any particular model is not required as long as it is equipped with an introduction pipe 8 that can be inserted into and removed from the hot air blowing port 9 of the upper lid 16, and hot air can be supplied from the introduction pipe 8. [Function] In the lining material construction apparatus of the present invention configured as described above, the form body 4 has a mold release agent applied to the surface of the outer shell 15 and a lining 2 applied in advance, for example, The tundish can body 1 is fixed to the lining 2 by clamping means, leaving a gap 3 corresponding to the thickness of the lining. Both ends of the support beam 11 provided on the upper lid 16 are fixed to the edge of the tundish can body 1 by a clamp jig 12. In this state, while applying vibration to the formwork body 4,
The void 3 is filled with a monolithic refractory material (powder) mixed with a thermosetting resin. Powder supply is carried out by pouring a pre-calculated amount of powder into the cavity 3 using a screw feeder or the like. It is generated by the vibration exciter 6 and is transmitted to the outer shell 1 via the anchor frames 13 and 14.
Due to the vibration transmitted to 5, the powder is moved into the gap 3.
It is supplied so that it is evenly filled throughout, and the lining is formed. After filling, the powder supply and vibration are stopped, and the mold body 4 is left in the tundish can body 1.
Moreover, the heating device 7 is operated without moving the can body 1. Approximately 400°C hot air generated by a burner (not shown) built into the heating device 7 is introduced into the space of the form body 4, that is, the heating chamber 5, through the pipe 8.
send to. The introduction pipe 8 attached to this device 7 is
With a simple mechanism, the hot air blowing port 9 provided in the upper cover 16 of the form body 4 can be moved in and out of the hot air blowing port 9, or can be moved in a detachable manner. The hot air blown into the heating chamber 5 in this way is transferred to the outer shell 15 of the form body 4.
is heated (radiation heat transfer) and released into the atmosphere from the exhaust port 10 of the upper lid 16. It is desirable that the diameter of the exhaust port 10 can be arbitrarily varied depending on the amount of hot air blown into the heating chamber 5 and the state of heat input into the chamber. As described above, the lining material containing the thermosetting resin and molded and heated by the mold body 4 and the heating device 7 can be hardened to a desired hardness when heated to approximately 90° C. or higher. . In this way, the tundish can body 1 with the inner lining formed on the surface of the lining 2 is completed in a state that can be used for actual operation. [Example] First example suitable for a tundish with an internal capacity of 15 tons
A construction device having the configuration shown in FIGS. 4 to 4 was created. The tundish can body was prepared with a lining material of a predetermined shape made of castable fireproof material. The form body was attached to this tundish, and the voids at intervals of about 30 mm were filled with an amount of monolithic refractory material calculated in advance according to the composition shown in Table 1.
Approximately 600 kg of material was filled into the gap from the screw feeder while being vibrated by a vibrator for about 3 minutes, and the bulk specific gravity of the lining material after filling was approximately 1.8.

〔effect〕

The lining forming device for a molten metal container of the present invention has the following effects. (1) The tundish with the lining material applied is set on the construction device of the present invention, and the tundish with the lining material applied is finally removed from the device and transported and removed, while the lining material is being applied. A series of processes (mold placement, positioning, material filling, heating, and mold removal) can be performed continuously in one workspace without moving the tundish at all, so only a small workspace is required, and work efficiency and efficiency are greatly improved. Improve. (2) Since the construction is carried out without moving the tundish, there is no impact on the tundish by causing it to collide, and therefore there is no misalignment of the mold or loss of homogeneity of the powder material after filling. A lining material with a desired thickness and uniformity can be formed safely and reliably. (3) Since the formwork is positioned and fixed by the tundish, the lining material of the desired thickness can be formed without the formwork moving even if vibration is applied for a long time.

[Brief explanation of the drawing]

1 to 4 show examples of the present invention, and FIG. 1 is a schematic cross-sectional view in the long side direction showing a state in which the tundish lining material application device is attached to the tundish main body. Figure 2 is A- in Figure 1.
3 is a cross-sectional view along the short side direction along the line A, and FIG. 3 is a cross-sectional view along the short side direction along the line BB in FIG. 1. FIG. 4 is a perspective view showing the anchor frame structure of the device of the present invention. 1: Tundish can body, 2: Lining material, 3: Gap for forming lining material, 4: Form body, 5 Heating chamber, 6:
Vibrator, 7: Heating device, 8: Inlet pipe, 9: Hot air inlet, 10: Exhaust port, 11: Support beam, 12: Clamp jig, 13: Anchor frame, 14: Anchor frame, 15: Outside Shell, 16: Upper lid, 1
7: Heat insulation material, 18: Guide spacer.

Claims (1)

[Claims for Utility Model Registration] 1. A box-shaped outer shell having an outer shape corresponding to a desired lining shape, an anchor frame that supports this outer shell from the inside, a hot air blowing port at one end and an exhaust port at the other end. a formwork body consisting of a top cover having a top cover, and a vibration exciter provided on the top cover of the formwork body, which supplies hot air to the hot air blowing port through an inlet/output or removable introduction pipe. A lining forming device for a molten metal container, characterized by comprising a heating device. 2. The lining forming device according to claim 1, which is a registered utility model, characterized in that a plurality of guide spacers are provided on the upper outer circumferential surfaces of the long sides and short sides of the box-shaped outer shell. 3. The lining forming device according to claim 1, characterized in that a support beam is provided on the upper surface of the top cover. 4. The lining forming device according to claim 1, characterized in that a heat insulating material is provided on the lower surface of the upper lid.