JP2831908B2 - Nozzle-receiving brick cleaning device having iron skin deposit removing means - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing deposits on the inner surface of a nozzle brick to which an insert nozzle for removing molten metal from a molten metal container such as a tundish or a ladle is attached. The present invention relates to a device for removing mortar and the like adhered to a steel shell.

[0002]

2. Description of the Related Art An insert nozzle for extracting molten metal is provided at the bottom of a molten metal container such as a tundish or a ladle.
A slide valve for controlling the flow of molten steel is provided.

FIG. 3 is a view showing a molten metal outlet provided on the bottom of the ladle. A nozzle brick 2 is provided at an opening formed in the ladle iron shell 1 to take out the molten metal. The insert nozzle 7 is inserted, and is bonded to the nozzle receiving brick with joint mortar. An opening through which molten metal flows out is formed in the insert nozzle 7, and an opening sand filling portion 9 above the opening is filled with opening sand 10, and a slide valve device provided on the lower surface of the ladle iron shell 1 is provided. When the slide plate (not shown) is opened, the molten metal flows downward with the spontaneous fall of the opening sand 10,
Taken out.

[0004] Such insert nozzles and plate bricks for slide valve devices need to be replaced because they are worn out by molten metal. When replacing the bricks, after removing the insert nozzles, the open bricks are formed on the inner surface of the nozzle receiving bricks. The metal part and sintered sand 3 formed by infiltration of the molten metal, and the cutting part 11 to which the sintered mortar formed by sintering the joint mortar 4 are attached to remove the attached material,
After removing the deposits, it is necessary to clean the inner surface of the nozzle brick.

[0005] Regarding such cleaning of the inner surface of the nozzle brick, the present applicant has already filed Japanese Patent Application No. 4-224001.
This is generally described with reference to FIGS. 4 to 6. FIG. 4 is a diagram for explaining a cutting tool for cleaning a cutting portion. As shown in FIG. 4B, the tool base 30 has a shape similar to the inner surface of the nozzle brick 2, and is inserted into the nozzle brick 2 to a predetermined position while rotating, and scrapes off the deposits. . FIG. 4 (a),
As shown in FIG. 4B, a plurality of cutting tool mounting ports 36 are formed on the tool base 30 in the length direction and the radial direction of the cross-shaped main body 37, and each cutting tool mounting port 36 has a cutting tool holder. Hardware 35 is provided. As shown in FIG.
The cutting tool retainer 35 has a structure in which the cutting tool 31 can be bolted to the side surface 33 and the tip end surface 34, respectively. In particular, the tip end is provided with a plurality of blades for cutting the same circumference and attached thereto. We are cutting gold etc. For the part that mainly cuts the slag and metal at the tip of the tool rest 30, it is mainly used as a metal cutting tool for heat resistance, and the part that mainly cuts brick waste is mainly made of diamond material and mortar. For the part to be formed, a relatively inexpensive carbon tool steel material and a tool material of each part can be arbitrarily changed as needed.

As shown in FIG. 5, a hole 3 penetrating through the surface of the tool base 30 in the direction of the center of rotation of the tool base and in the direction of the side surface 33 and the tip end surface 34 of the tool base therefrom.
Air is supplied through this hole to cool the inner surface of the nozzle brick 2 and the cutting tool 31, and to blow off the removed matter generated during the attached matter removing operation into the ladle by air blow. Thus, cleaning after the adhering matter removing operation is also performed.
When cleaning cannot be sufficiently performed by air blow alone, a wire brush or the like is attached between cutting tools, and cleaning is performed by using both brushing and air blow. In addition, this air cooling is performed when hot work is performed.
Since it is ９００900 ° C., it is extremely important to prevent rapid wear due to thermal softening of the cutting tool.

[0007] Normally, a nozzle brick used for a tuyere of a ladle is a joint which is attached to a joint between an insert nozzle and a nozzle brick in order to set a new insert nozzle when replacing an insert nozzle. It is necessary to remove the remaining mortar, and the slag and metal that have entered the joint, and after removing the insert nozzle 7 shown in FIG. The metal and sintered sand 3 and joint mortar 4 are scraped by rotating while inserting the tool table 30, and at the same time, the inner surfaces are cleaned by air blow.

[0008]

By the way, the above-described nozzle receiving brick cleaning apparatus can remove mortar, sintered sand, and ingot adhering to the inner surface of the nozzle receiving brick. It is not possible to remove mortar adhering to the steel sheath of the slide valve. what if,
If you try to remove the mortar and the like attached to the steel with the cutting tool 31, there is a possibility that the steel will be cut together,
On the other hand, if priority is given to protection of the steel skin, mortar attached to the steel skin cannot be completely removed. However, mortar adhering to the iron shell is not completely sintered under temperature conditions and is relatively easy to remove.Moreover, the mortar is often not completely filled and the mortar does not adhere. The adhered mortar was removed manually.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has a nozzle receiving brick cleaning device having means for removing iron deposits which can remove mortar and the like adhering to the shell of a molten metal container without manual operation. It is intended to provide a device.

[0010]

SUMMARY OF THE INVENTION The present invention relates to an apparatus for cutting an inner surface of a nozzle receiving brick having a plurality of blades removably attached to a side of a tool base, the diameter of which decreases toward the tip, the tool base comprising: A deposit removing member elastically pressed against the inner periphery of the nozzle hole metal portion is provided at a lower portion.
Further, the attached matter removing member according to the present invention is characterized in that the attached matter removing member comprises a rod-shaped scraper attached to the tool base via a spring. Further, a wire brush is attached to the tool stand of the present invention.

[0011]

According to the present invention, an attachment removing member which is elastically pressed against the steel shell of the molten metal container and the steel shell of the slide valve is provided at the rear part of the tool table whose diameter becomes smaller toward the tip, The mortar adhered to the iron skin can be more completely removed by rotating the tool table in a state where the mortar is pressed against the mortar adhering to the steel bar, and further attaching the wire brush to the tool table.

[0012]

FIG. 1 is a view showing an embodiment of a nozzle receiving brick cleaning apparatus having an iron skin deposit removing means according to the present invention, and FIG. 2 is an enlarged view of a scraper. 1 and 2, the configuration of the tool stand 30 and the mounting of the cutting tool 31 are shown in FIGS.
The description is omitted because it is the same as that described above. A bar-shaped scraper 50 is elastically pressed by the spring 51 against the steel shell 1 of the molten metal container and the steel shell 1a of the slide valve. That is, as shown in the enlarged view of FIG. 2, a scraper 50 is attached to the other end of a spring 51 having one end attached to a plug-shaped hook 52 fixed to the tool base 30 with fixing bolts 53.

When the cutting tool 30 is rotationally driven to cut the inner surface of the nozzle receiving brick and is inserted into the inside, the scraper 50 provided at the rear portion of the tool table is elastically pressed by the steel and adheres to the steel. The removed mortar and the like will be removed. Since the scraper 50 is elastically pressed by the spring, the scraper is not scraped. Further, as shown in FIG. 1B, by attaching and using the wire brush 55 on the tool base, it is possible to more completely remove the mortar and the like adhered to the steel skin.

In the above embodiment, the mortar is removed by using a scraper. However, the mortar is removed by using a metal fitting to which the end of a spring is attached, a leaf spring, or the like without providing a scraper. You may do so.

[0015]

As described above, according to the present invention, the removal of mortar adhering to the molten metal container and the shell of the slide valve is automated, and manual work can be eliminated.
Therefore, it is possible to promote full automation of nozzle receiving brick cleaning.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a nozzle receiving brick cleaning apparatus having an iron skin deposit removing means of the present invention.

FIG. 2 is an enlarged view of a scraper.

FIG. 3 is a view for explaining a molten metal outlet.

FIG. 4 is a diagram for explaining a cutting tool that has already been proposed.

FIG. 5 is a diagram for explaining a cutting tool that has already been proposed.

FIG. 6 is a view for explaining deposits on the inner surface of the nozzle brick.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ladle iron skin, 2 ... Nozzle receiving brick, 3 ... Metal and sintered sand, 4 ... Joint mortar, 9 ... Nozzle opening sand filling part, 11
... Cutting part, 30 ... Tool table, 31 ... Cutting tool, 32 ... Air cooling air hole, 33 ... Tool table side surface, 34 ... Tool table tip surface,
35 ... Cutting tool holder, 36 ... Cutting tool mounting opening,
50: scraper, 51: spring, 52: plug-shaped hook, 53: fixing bolt.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F27D 3/15 B22D 43/00 F27D 23/02

Claims (3)

(57) [Claims] 1. A device for cutting an inner surface of a nozzle receiving brick having a plurality of blades removably attached to a side surface of a tool stand whose diameter decreases toward a tip end, wherein a metal portion of a nozzle hole is provided at a rear portion of the tool stand. A nozzle-receiving brick cleaning apparatus having an iron-clad deposit removing means, wherein a deposit removing member that is elastically pressed is provided around the periphery. 2. The nozzle receiver according to claim 1, wherein said deposit removing member comprises a rod-shaped scraper attached to a tool base via a spring. Brick cleaning equipment. 3. The apparatus according to claim 1, wherein
Furthermore, a nozzle receiving brick cleaning apparatus having a means for removing deposits of iron skin, wherein a wire brush is attached to a tool stand.