JPH0248416Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an apparatus for introducing slag balls into converters during tapping.

(Prior Art) The purpose of the slag ball is to plug the tapping hole when the molten steel finishes pouring out and the slag in the furnace begins to come out when steel is tapped from the converter into the ladle. In order to achieve this objective, it is necessary to place the balls almost directly above the tapping hole and to insert them at the final stage of tapping. Furthermore, in view of the layout of the converter equipment, the equipment used therefor has a long arm and is required to move quickly.

For this reason, conventionally, as shown in FIG. 2, a cart 7 is installed on a suspension stand 12 on the roof of the hearth so that it can move forward and backward, and a long arm 8 is provided on the cart 7, and a slag ball 6 is attached to the tip of the cart 7. A device for suspending is known.

In the figure, 7-1 shows the state where the cart is moved backward, and 8
-1 indicates the position of the arm at that time. Similarly, 7-2 and 8-2 show the state in which the cart is moved forward and the slag ball is inserted into the furnace. 1 is a converter, 2 is a tapping hole, 3 is a ladle, 4 is a heat shield, 5 is a furnace operating floor, 9 is a preliminary slag box, 10 is molten steel, and 11 is slag.

(Problems to be solved by the invention) As mentioned above, the conventional slag ball feeding machine is a vertical device that has a long arm 8 and is suspended from the roof of the furnace. One such facility must be installed at each base.

(b) Generally, there is only a narrow space in the converter hearth, and there was a problem of space competition with, for example, the online repair machine for tapping hole 2, the sampler equipment during tapping, etc.

Furthermore, as disclosed in Japanese Patent Publication No. 52-32604, a device is known in which a charging chute is fixed to a movable cart and the slag balls are rolled through the charging chute. ,
In this case, the length of the charging chute remains unchanged and cannot be rolled, and the slag balls are rolled and charged, which is disadvantageous in terms of effective use of space on the hearth operating floor. Moreover, a special mechanism is required to set the slug ball in the charging chute, and the slug ball charging accuracy is also poor.

(Means for Solving the Problems) The present invention has been made to advantageously solve the problems of the prior art described above, and its gist is as follows:
This converter slag ball charging device is characterized by having a slidable arm, which is equipped with a slag ball hanging tool at the tip and is configured in multiple stages, placed on a self-propelled cart so that it can extend and contract, tilt, and rotate.

The present invention will be explained below based on the drawings.

FIG. 1A is a plan view showing an embodiment of the present invention, and FIG. 1B is a side view.

As shown in Fig. 1 A and B, the present invention is such that a telescopic arm 8 is installed on a trolley 7 that can move on the hearth operating floor 5 on its own so that it can tilt and turn. A slag ball hanging tool 13 is provided to hold the slag ball 6 in a suspended manner.

The arms 8 according to the present invention, such as 8A, 8B, and 8C, can be expanded and contracted by sliding on each other.

(Function) The slag ball 6 is suspended from the tip of the arm 8c by, for example, a wire, and is kept on standby. When charging the slag ball, the slag ball is inserted into the furnace through the opening 4A of the heat shield plate 4. This arm 8 is 8A, 8B, 8
As shown in C, it is divided into three stages and has an expandable structure. The number of stages is not limited to three, but may be two or more. When the arm 8 is on standby, it is retracted as shown in 8-1, and when charging, it is extended as shown in 8-2 and its tip enters the converter. Furthermore, the slag balls 6 are floated on the surface of the molten steel. This is achieved by tilting arm 8 as shown at 8-3. In this state, the hanging wire is fused and the slug ball 6 is separated from the holder 13. After the slag ball 6 is floated on the molten steel 10 directly above the tapping hole 2, the arm 8 is returned to the standby state by the reverse operation.

The slag balls 6 to be charged are generally placed in a box 9 on the hearth operating floor 5, and this position is offset from the slag ball feeding locus when viewed in plan. The arm 8 can be turned to the state 8-4 and held above the preliminary slug ball box 9, and the slug ball 6 is suspended from the tip of the arm 8 and is on standby. The trolley 7 is usually 7-
It stands by at position 1, and when it is turned on, it moves automatically to position 7-2. In this case, it may be operated by an operator or may be unmanned. If it becomes an obstacle to converter hearth work, etc., or if slag balls from another converter are being fed, in addition to the above-mentioned operations, the self-propelled device needs to be self-propelled to other converters, so a steering mechanism is installed on the self-propelled device. .

(Effects of the invention) Compared to conventional equipment, this invention requires only one converter to operate and one converter to operate.
With a converter that takes the form of base suspension, the number of installed bases can be halved, and the equipment can be made more compact, reducing equipment installation costs. Also, it is possible to reduce the cost of equipment installation, and eliminate the need for steel tapping, which previously could not be installed due to the slag ball feeding device. It becomes possible to install a hole online repair machine, etc., and in addition, it becomes easy to carry out online maintenance in the event of a failure, and there is an effect that interruption of converter operation due to equipment failure can be avoided.

[Brief explanation of the drawing]

Figure 1A is a plan view showing an embodiment of the present invention;
Figure B is a side view thereof, and Figure 2 is a side view of the conventional device. 1... Converter, 2... Steel tapping hole, 3... Ladle, 4... Heat shield, 5... Furnace operating floor, 6... Slag ball, 7... Cart, 8... Arm, 9... Spare slag ball box, 10... Molten steel, 11...Slag, 12...Suspension stand,
13...Slug ball hanging tool.

Claims (1)

[Scope of utility model registration request] A converter slag ball charging device characterized in that a slidable arm having a slag ball hanging device at its tip and having multiple stages is mounted on a self-propelled cart so as to be extendable, tiltable, and rotatable.