JPS582527Y2 - slag breaker - Google Patents

Description

[Detailed description of the invention] This invention destroys the skin, or slag layer, floating and solidifying in a molten metal tank, etc., and then inserts an immersion device such as a thermocouple or sample collection device that is immersed in the molten metal. The present invention relates to a slag breaker for facilitating the use of a slag breaker.

Conventionally, it is well known that various pretreatment operations are performed on the steel inside the ladle in order to improve product quality when transitioning from steelmaking to ingot production in the smelting process. The complexity and time required are increasing as the demands on technology become more sophisticated.

In addition, although the mainstream of ingot making work is shifting to continuous casting,
This means that a large amount of slag is formed on the steel in the ladle.

For this reason, the surface of the slag layer formed on the steel in the ladle is cooled and solidified, making it difficult to insert immersion devices such as thermocouples and sample collection devices into the molten steel for the purpose of temperature measurement and sample collection. It's coming.

Conventionally, before inserting these immersion devices into molten steel, the slag layer was manually destroyed using an iron rod, but instead of manually driving a heavy iron rod into a hot ladle. This is a difficult task, and it also has the disadvantage that slag or molten steel gradually adheres to the tip of the iron rod and solidifies, making it unusable.

For this reason, the present applicant has previously proposed to remove the drawbacks of the above conventional method by destroying the slag layer and inserting a dipping device at the same time (Utility Application No. 70244/1983); The slag breaker has a thermocouple measuring device built into its tip, so its strength is limited, so it is effective when the slag layer is relatively thin; however, as mentioned above, when the slag layer is It has the disadvantage that it cannot be applied in cases where it is thick and its surface is solidified, and a large destructive force is required.

The present invention has been made to eliminate the above-mentioned drawbacks of the conventional art, and for this reason, the slag breaker according to the present invention is a metal breaker having a solid conical or spherical tip at one end and a protrusion at the other end. The protrusion is fixed to one end of a paper tube, and the plug is attached to an automatic lifting device that can be lifted up and down over the molten metal bath, making it possible to destroy the harder slag layer, It is characterized by facilitating the subsequent insertion of the immersion device.

Hereinafter, the contents of the present invention will be explained based on the embodiments shown in the attached drawings.

FIG. 1 shows a slag breaker 10 according to the present invention, which includes a cylindrical paper tube 1 and a cast iron or other metal material inserted and fixed into the tip of the paper tube 1. The plug body 2 consists of a solid conical or spherical (conical shape in the figure) tip 3 and a protrusion 4 (second
), and is fixed in the paper tube 1 by various methods shown below.

That is, FIGS. 2a to 2C show examples of attaching the stopper 2 to the paper tube 1 of the slag breaker according to the present invention, and the one shown in FIG. 5 is provided and the protrusion 4 is fitted into the end of the paper tube 1.
It is fixed by driving an appropriate number of fixing tools 6 such as staples or nails from the outside, and the one shown in FIG. It is fixed by being tightly press-fitted into the end of the paper tube 1, and the one shown in FIG. It is something.

In the above example, all the protrusions 4 of the plug body 2 are inserted inside the paper tube 1, but conversely, the protrusions 4 can be formed into an annular shape and fixed to the outside of the paper tube 1.

Further, the paper tube 1 used in the slag breaker of the present invention has sufficient strength and thickness so that the stopper 2 will not fall off or be burned out when the slag is broken.

FIG. 3 shows another embodiment of the slag breaker according to the present invention, in which molten steel is provided in the protrusion 4 of the stopper 2 which can communicate with the outside of the paper tube 1 through the passage 9. A cavity 11 for sample collection is formed, and the stopper 2 has a portion 2a having the passage 9, as shown in FIG.
The passage 9 is covered with a cylinder 12 made of paper or a thin iron plate, which allows the tip of the slag breaker to pass through the slag layer. During this time, the slag is prevented from entering into the cavity 11, and when the tip of the slag breaker is immersed to a predetermined depth, the cylinder 12 is burned out or melted, and molten steel flows into the cavity 11. This made it possible.

Next, in order to destroy the slag layer using the slag breaker 10 of the present invention, as shown in FIG. A frame 24 extending in the vertical direction is erected, and the frame 24
(a pair of sprockets each supported by a shaft above and below) 25.
A chain 26 is wrapped around 25', and the chain 26
Attach the holder 28 to one place via the connector 27,
The slag breaker 10 is attached to an automatic lifting device 20 that raises and lowers the holder 28 by rotationally driving the sprocket 25 by a drive device 30 with a reducer fixed on a support bracket 29 attached to the frame 24. Put it on and do it.

That is, as shown in detail in FIG.
A stem 28a that can be press fit into the paper tube 1 of the slag breaker 10 is integrally formed at the tip of the slag breaker 10.
The slag breaker 10 is fixed to the holder 28 by fitting the paper tube 1 around the holder 8a.

Further, at this time, the tip of the stem 28a is arranged so as to abut against the upper end surface of the protrusion 4 of the plug body 2.

After the slag breaker 10 is attached to the holder 28, when the holder 28 is lowered by the drive device 30, the conical tip 3 of the slag breaker 10 collides with the slag layer S, as shown by the dotted line in FIG. to destroy the slag layer S.

At this time, the tip 3 of the plug 2 of the slag breaker 10 is made of a solid cone, and the upper end surface of the protrusion 4 abuts the tip of the stem 28a of the holder 28, so it can exert extremely large destructive force. .

In this way, the tip of the slag breaker 10 is connected to the molten steel 21.
When the holder 28 is lowered to a predetermined depth within the holder 28, it is temporarily stopped, and then raised to a predetermined position and stopped.

Next, place the used slag breaker 10 in the holder 28.
Then, a probe incorporating an immersion device such as a thermocouple or other measuring instrument is attached to the holder 28, and the probe is immersed and lowered again.

At this time, since the slag layer S has already been destroyed, it is extremely easy to insert the probe into the molten steel 21, so that temperature measurement, sample collection, etc. can be carried out completely and accurately without damaging the immersion device. be able to.

As described above, when using the present invention, the slag breaker
Since the protrusion is fixed to one end of a paper tube which is a metal stopper and has a solid conical or spherical tip at one end and a protrusion at the other end, the structure is not only extremely simple, but also Because it can be manufactured at low cost, it can be used as a disposable slag breaker, and because it is built into a lifting device to break the slag layer using mechanical force, it can handle larger slag breakers than conventional slag breakers. Destructive force can be exerted, and furthermore, due to the water content and combustibility of the paper tube, slag and molten metal do not adhere to the slag breaker, and workability is extremely good.

Although the present invention has been specifically explained to destroy the slag layer floating on the bay steel in the ladle, the present invention is not limited to this, but can be widely used to destroy the slag layer floating and solidifying on the molten metal in general. can do.

[Brief explanation of the drawing]

Fig. 1 is a partially broken overall view of the slag breaker according to the present invention, Fig. 2 is a partial sectional view showing an example of the plug attachment of the slag breaker according to the present invention, and Fig. 3 is a slag breaker according to the present invention.
FIG. 4 is an exploded perspective view of a plug that is attached to the embodiment shown in FIG. 3, FIG. 5 is a diagram showing an example of use of the slag breaker of the present invention, The figure is an enlarged view of the main part of FIG. 5, partially broken away. 1...paper tube, 2...stopper, 3...tip, 4...
・Protrusion, 10...Slag breaker-111...Vacant room.

Claims (2)

[Scope of utility model registration request] (1) A molten metal slag breaker made by combining a metal stopper with a solid conical or spherical tip at one end and a protrusion at the other end by fixing the protrusion to one end of a paper tube - 0 (2) Registration of a utility model in which the protrusion is inserted and fixed into the paper tube.Registration of a utility model in which the slag breaker of Claim 1-8 (3) A cavity for sample collection is provided in the protrusion of the plug body. Slag breaker-6 according to claim 2