JPS6380958A - Ladle device for molten metal - Google Patents

Abstract

PURPOSE:To contrive reduction of residual slag, etc., by disposing 1st and 2nd engaging members to a main cap and body respectively of a ladle, and engaging these members to support the main cap to the body at the time of tiling the ladle body. CONSTITUTION:An L-shaped arm 10 is provided between an auxiliary cap 4 and a projecting part 8 on the outer periphery of the main cap 4 and the square bar-shaped engaging member 11 is projected to the position corresponding to the arm 10 on the outer peripheral face in the upper part of the ladle body 2. The arm 10 engages with the engaging member 11 to prevent the main cap 4 from turning around a shaft 9 when the ladle body 2 is tilted by a hook 16 of another crane in a slag discharge place. Only the auxiliary cap 5 is, therefore, opened and the slag is discharged therefrom even if the ladle body 2 is tilted up to 180 deg.. The opening of the main cap 4 is thus prevented. The residual is decreased by the above-mentioned method and since the temp. drop of the ladle body 2 is decreased, the temp. drop of the molten steel is decreased as well.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a ladle device for molten metal that has a ladle body that stores molten metal therein, and a heat-retaining lid that keeps the molten metal warm.

[Background Art] For example, in the production of steel, molten steel blown in a converter is tapped into a ladle. This ladle has a ladle body for storing molten steel and a heat-insulating lid for keeping the molten steel warm. After receiving the steel, the heat-insulating lid is placed on the ladle body. The molten steel in the ladle body is continuously fed from a nozzle provided at the bottom of the ladle body through, for example, a tundish. It is poured into a mold for l. After the injection of molten steel is finished, when discharging the molten slag inside the steel body, the crane is engaged with a pair of trunnions provided on the outer periphery of the steel body, with the insulation lid still in place. By hooking a crane to the bottom of the ladle body and lifting the crane, the ladle body is tilted around the trunnion.

In this case, the heat-insulating lid has a protrusion that engages with a hook provided on the upper edge of the ladle body so that it can rotate between the main lid, which is supported by the ladle body, and the tip of the main lid. In the early stage of slag removal when there is a lot of slag inside the ladle body, the ladle body is tilted at a tilt angle of 90' or less to open only the secondary lid and the ladle body is Discharge slag while preventing temperature drop as much as possible. On the other hand, when the remaining slag m is small, the tilting angle of the ladle body is set to 90 degrees or more to discharge the slag. In this case, one lid rotates around the hook due to the weight of the heat-insulating lid, and the slag is discharged in an open state.

After the slag discharge is completed, the ladle is transported to the steel receiving position with the heat insulating lid placed on the steel ladle body again.

[Problems to be Solved by the Invention] By the way, in order to completely discharge the slag in the ladle body, the tilting angle of the ladle body should be set to about 180° to almost completely drain the ladle body. The opening must face downwards. However, since the insulation lid has a heavy weight of about 10 tons, if the tilting angle of the ladle body exceeds approximately 145°, the ladle body will flip around the trunnion due to the weight H of the insulation lid. It ends up. Therefore, there is a problem that the slag cannot be completely removed from the ladle body, and a large amount of slag remains in the ladle body. In order to solve this problem, it is possible to remove the heat-insulating lid from the ladle body and then tilt the ladle body to remove the slag, but in this case, the work of attaching and removing the heat-insulating lid is Since this takes a long time, the steel body is cooled down during that time, and the temperature of the molten steel to be received next decreases.

This invention was made in view of such circumstances, and
It is an object of the present invention to provide a steel tapping device for molten metal that can reduce the amount of slag remaining in a ladle body during slag discharge and reduce the amount of temperature drop in the ladle body.

[Means for Solving the Problems] The fourth aspect of the present invention provides an easy-to-use ladle device that includes a ladle body in which molten metal is stored, and a ladle that is placed on the upper edge of the ladle body. A molten metal tapping device having a heat-retaining lid for keeping the molten metal warm, the heat-insulating lid comprising one lid detachably supported on the tapping body and rotatably provided at the tip of the one lid. A first engaging member and a second engaging member are provided on the first lid and the main body, respectively, and when the main body is tilted, these first The first lid is supported by the ladle main body by engaging the second engaging member.

[Function] In this invention, when the ladle main body is tilted during slag discharge, the first engaging member and the second engaging member engage, and one lid is supported by the ladle main body. , one lid is prevented from opening even if the tilting angle of the ladle body increases. On the other hand, in this state, the assistant referee rotates one lid to open it, and the slag is discharged from the part opened by the assistant referee. For this reason, f
Since the ladle is not inverted with iffi, the inversion angle can be approximately 180°, and the amount of slag remaining in the ladle body is reduced. Furthermore, since there is no need to remove the heat-insulating lid once, the amount of temperature drop in the ladle itself is small.

[Embodiments] Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings.

FIG. 1 is a side view showing a molten steel tapping device according to this embodiment. The ladle device 1 is composed of a ladle fQ main body 2 and a heat-insulating lid 3. The main body 2 is composed of a cup-shaped iron shell lined with a refractory material, and molten steel after being blown in a converter is stored therein. A pair of trunnions 12 are protruded from the outer periphery of the ladle body 2, and a crane hook 13 engages with the trunnions 12 when the ladle body 2 is transported or tilted. A flange 14 is formed on the upper outer circumferential surface of the ladle body 2, and the ladle body 2 is supported by a ladle car or the like for transporting steel tapping equipment. Further, a nozzle 15 that can be opened and closed is formed at the bottom of the ladle body 2, and when the nozzle 15 is opened, molten steel flows out from the ladle body 2. Furthermore, a hook 16 is provided on the outer peripheral surface of the lower part of the main body 2, and a crane hook (not shown) is engaged with this hook 16 to remove the steel! By lifting the main body 2, the canceling main body is tilted.

A heat-insulating lid 3 is placed on the upper edge of the ladle body 2 to close the opening of the ladle body 2. This heat-insulating lid 3 is composed of a main N4 and an assistant referee 5, and the secondary M5 is attached to the lid 4 so as to be rotatable about a support shaft 6. A protrusion 8 extending diagonally downward to which a locking bottle 9 is fixed is formed at the end of the raw boiler 4 opposite to the sub-lid 5, and corresponds to the protrusion 8 at the upper end of the steel stock 2. A hook 7 is provided at the portion where the ladle body 2 is tilted, and the bottle 9 is engaged with the hook 7 to prevent the heat insulating lid 3 from separating from the ladle body 2. ing.

An L-shaped arm 10 is installed between the sub M4 on the outer periphery of the raw boiler 4 and the projection 8, and a square bar-shaped arm 10 is installed on the upper outer periphery of the ladle body 2 at a position corresponding to the arm 10. An engaging member 11 is provided in a protruding manner to prevent the arm 1o from engaging with the engaging member 11 and opening the main frame 4 when the main body 2 is tilted.

Next, the operation of the device configured in this way will be explained. First, molten steel is tapped into the ladle body 2 without the heat-insulating lid 3 placed thereon, and after the tapping is completed, the heat-insulating lid 3 is suspended by a crane and placed on the ladle body 2. Next, the casting 14 device 1 is placed on a truck and transported on a track to a continuous casting facility.

In continuous casting equipment, the nozzle 15 is opened and the FI
JM passes through this nozzle 15 and is injected into the mold via the tundish. After continuous VC casting of molten steel is completed,
The nozzle 15 is opened and the steel removal device 1 is transported for slag removal. In this case, the ladle body 2 is connected to the trunnion 12.
The steel body 2 is tilted by hooking the crane hook of another crane onto the hook 16 and lifting the crane while being suspended by a crane. In this case, as shown in FIG.
1 and prevents the raw boiled meat 4 from rotating around the shaft 9. Therefore, even if the tilt angle exceeds 90°, only the assistant referee 5 will open and the slab will be ejected from that part.
The ladle body 2 is not turned over due to the heavy color of the heat-insulating lid.

Therefore, the slag in the ladle body can be almost completely discharged by setting the tilting angle to about 180 degrees, and the amount of slag in the ladle body 2 can be reduced. In addition, there is no need to remove the lid in advance to discharge the slag, and since only the assistant referee is opened and the slag is discharged, the temperature drop in the steel collecting body 2 is small, and the temperature drop in the molten steel to be received next is reduced. Can be done.

Next, the effects of this embodiment will be specifically explained. FIG. 3 is a diagram showing the distribution of the slag thickness of molten steel according to the following batches, comparing the example and the conventional example, with the horizontal axis representing the slab thickness and the vertical axis representing the frequency. According to this, in the case of the example, although there are variations in the amount of slag flowing out during steel receiving, compared to the conventional example, the average value of slag thickness and its variation depending on batches are reduced, and in particular, the slag The number of thick ones has been reduced. Due to this.

I was able to obtain good quality.

In this embodiment, the rotation of the main M4 is prevented by the hook 10 and the rod-shaped engagement member 11, but the present invention is not limited thereto, and, for example, the hooks may be engaged with each other.

[Effects of the Invention] According to the present invention, even if the ladle body is tilted, the heat-insulating lid does not turn over, so the ladle body can be tilted approximately 180 degrees. Therefore, the amount of slag remaining on the tray body can be reduced.

Further, when discharging the slag, there is no need to remove the heat-insulating lid once, and only the assistant referee is opened, so it is possible to suppress a drop in the temperature of the ladle body. Therefore, it is possible to limit the temperature drop of the next molten metal by one.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a molten metal handle mushroom according to an embodiment of the present invention, Fig. 2 is a diagram showing its implementation state, and Fig. 3 is a graph diagram showing the effects of the embodiment of the invention. . 1: Ladle device, 2: Ladle body, 3: Heat insulation lid, 4: 1 benefit,
5; assistant referee, 10; hook, 11; engaging member, 12; trunnion

Claims (1)

[Claims] In a molten metal ladle device that has a ladle body in which molten metal is stored and a heat-insulating lid that is placed on the upper edge of the ladle body and keeps the molten metal in the ladle warm, the heat-insulating lid is attached to the ladle body. It has a main lid that is supported in a detachable manner and a sub-lid that is rotatably provided at the tip of the main lid.
An engaging member and a second engaging member are provided, and when the steel handle body is tilted, the first engaging member and the second engaging member are engaged and the main lid is closed. A ladle device for molten metal, characterized in that it is supported by the ladle body.