JPS5956955A - Mechanism for discharging molten steel and slag remaining in tundish for continuous casting machine - Google Patents

Abstract

PURPOSE:To discharge safely and easily the molten steel and slag remaining in the lower part on the side wall of a tundish by constituting a titled mechanism in such a way that a discharging nozzle for discharging the molten steel and slag is provided and the plug fitted into the nozzle is attached and detached by a plug attaching and detaching means. CONSTITUTION:A discharging nozzle 3 is provided in the lower part on the side wall of a tundish 2 of a continuous casting machine and a plug 4 is fitted thereto. When the rod of the 1st cylinder 13 is retracted, a movable shaft 10 is turned counterclockwise through the 1st lever 8, a link 12 and the 2nd lever 11 to discharge the molten steel and slag remaining in the tundish 2. The plug 4 mounted through a plug connecting means 15 to a turning shaft 10 is then removed from the inside of the nozzle 3. Fitting of the plug 4 into the nozzle 3 is accomplished by extending the rod of the cylinder 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for removing molten steel and slag remaining in a tundish when a continuous casting machine, particularly a horizontal continuous casting machine, breaks or breaks out at the end of pouring molten steel or when a breakout accident occurs. This relates to a discharge mechanism for discharging.

In recent years, in place of the so-called vertical continuous casting machine that draws the molten steel in the tongue tissue downward, ayu-making nozzles are installed horizontally on the top of the side wall of the tongue tissue, and the mold is It is connected horizontally to a nozzle, and the molten steel in the tundish is poured into the mold through the nozzle.

A so-called horizontal continuous casting machine was developed that draws the material while cooling it.

Conventionally, in the above-mentioned horizontal continuous casting machine, the molten steel and slag remaining in the tundish at the end of casting, for example, are discharged by a discharge system consisting of a flag fitted into the bottom wall of the tundish and a plug attachment/detachment means provided in the tundish. This is done by a mechanism.

However, the conventional ejection mechanism has the following problems. I
(1) It is necessary to provide a plug attachment/detachment means for each tongue tube, and a large space is required at the lower part of the tube to receive the molten steel and slag discharged from the bottom of the tube, which increases equipment costs.

■ Plug attachment/detachment means are complicated.

■ If the plug is stuck to the bottom of the tundish and it is impossible to remove it using the plug attachment/removal method, melt the area around the plug with gas etc. and remove the plug (
It's not great, but this task is extremely difficult.

■ The molten steel and slag ejected from the bottom wall of the tundish are scattered around, which is dangerous.The invention was made to solve the above-mentioned problems. Then, drain the molten steel and slag remaining in the tundish.
16) a discharge nozzle; a frusto-conical plug removably inserted into the discharge nozzle from outside a side wall of the tundish; retaining the plug within the discharge nozzle; and pulling the plug from the discharge nozzle; The plug attachment/detachment means is configured such that the plug can be attached to and detached from the discharge nozzle by moving the cylinder lever to the valve U7. It is characterized by being able to tilt so as not to hit the discharge gutter attached to the bottom of the discharge nozzle.

The present invention will be explained by way of examples with reference to the drawings.

1 is a partially sectional front view of an embodiment of the present invention, FIG. 2 is a partially omitted side view, and FIG. 3 is a sectional view taken along the line A--A in FIG. 1.

In Figures 1 to 3, ■ indicates the mold (
A tanditshu trolley 2, which is movable in directions (not shown), is placed on the tanditshu trolley L, and is formed at the bottom of the side wall opposite to the mold side of the isch 2. 1 non-discharge nozzle for discharging molten steel and slag remaining in the tundish 2; 4 a plug 5 in the shape of a truncated cone fitted in the discharge nozzle 3; 6 is a fixed shaft horizontally connected to the discharge nozzle 3 side of the tundish 2 of the tundish truck 1 via a bearing 7, and 8 is a part of the fixed shaft 6. A rotatably attached louver, 9, a fixed shaft 60, a frame body with several pieces 11 rotatably attached, 10
A movable shaft is provided on the upper end of the frame 9 in parallel with the fixed shaft 6, and the earthwork is fixed at a position corresponding to the upper end of the 1st lever 8 of the movable shaft 10.

12 is a link that connects the second lever 8 and the upper part of the second lever, and ■3 is a link that connects the second lever 8 with the base end pivoted to the tanditshu trolley 1 (with the fixed shaft 6 as the center).

The first cylinder 14 has its base end pivoted on the tandish truck 1, and the frame body (9 is attached to the fixed shaft 6).
A second cylinder 15 for tilting about the center is a plug connection means attached to the movable shaft 10. The plug connecting means consists of a lever J6 fixed to the movable shaft 10 and a link 18 that connects the bracket 1''/ fixed to the rear surface of the plug 4. 19 is attached to the upper end of the frame 9. A presser iron is used to receive the reaction force when the plug 4 is pulled out from the discharge nozzle 3, and it can be moved forward and backward by turning the handle 20.

21 is a kite pin attached to the upper part of the frame body 9;

Further, 22 is a guide lever attached to the plug connecting means 15. Guide bin 21 and guide lever 2
2 - After the plug 4 is removed from the discharge nozzle 3, the plug connecting means 15 is suspended 7 mm from the plug 4 with respect to the lever 16. This is to prevent one block from blocking the passage.

Next, the operation of the two consecutive embodiments will be explained.

As shown by the solid line in FIG. 3, when the plug 4 is inserted into the discharge nozzle 5, the first cylinder 13
When the rod of 8. is retracted, the movable shaft 10 moves to the 8th lever. It rotates counterclockwise in FIG. 3 via the link 12 and the second lever 11. With this step h7, the plug 4, which is connected to the rotation axis 0 through the plug connecting means lsi, is removed from the inside of the discharge nozzle 3. This state is shown by the two-dot chain line in FIG. When the plug 4 is pulled out from the discharge nozzle 3, the molten steel and slag remaining in the kundish 2 are ejected from the discharge nozzle 3 onto the discharge gutter 5.

When removing the plug 4, the tip of the presser rod 19 is brought into contact with the side wall of the tundish by turning the handle 20. As a result, the holding rod 19 receives the reaction force applied to the frame body 9 when removing the plaque, so that the plug 4 can be easily removed.

When the plug 4 is inserted into the discharge nozzle 3, the link 12 and the lever 8 are arranged in a straight line. This is because when pulling out the plug 4 from the discharge nozzle 3, the plug 4 can be pulled out with a large force, and once the plug 4 is pulled out from the discharge nozzle 3,
This is to enable the second lever 11 to be rotated by a slight rotation by only slightly rotating the lever. Rlj
In other words, the plug 4 can be easily removed and the plug 4 can be quickly moved away from the discharge nozzle 3 after being removed.

When replacing the tundish 2, after removing the plug 4 from the discharge nozzle 3 as described above, retract the rod of the silk 2-linter 14 and replace the frame 9 as shown by the two-dot chain line in FIG. Tilt the whole thing.

In this way, the tundish 2 is replaced after the discharge gutter 5 is prevented from hitting the frame 9.

As explained above, according to this invention, tandates/
There is no need to install a plug attachment/detachment mechanism for each unit, and there is no need to provide a large space below the unit, so equipment costs can be reduced to a minimum.

Further, since the plug 5 is attached to the side surface of the tundish, it can be attached and detached relatively easily. Sara C2, 4. There are two useful effects: there is no risk of the molten steel and slag discharged from the IJ being scattered around, and it becomes impossible to remove the plug/in this case, the plug removal work using gas etc. can be done easily. It will be done.

[Brief explanation of the drawing]

Figure 'iJ41 is a partially sectional front view of an embodiment of the present invention.
Figure 2 is a side view with all parts omitted, Figure 3 is A-A in Figure 1.
It is an A-line sectional view. In the drawing, 1-Tandishunyu trolley 2...Tandishun 34 non-exiting nozzle 4
... Plug 5 ... Discharge gutter 6 - Fixed shaft 7
... Bearing 8 ... No. 9 frame
10 Movable shaft 11-second lever 1
2. Link 13... 1st cylinder 14... 2nd
Cylinder 15...Plug connection means 16...17 Bar 1
'7 Mounting bracket 18...Link 19/Pushing rod 20...Handle 21 Kite pin 22...Guide lever Applicant Nippon Kokan Co., Ltd. agent Natsuo Shiotani ((Ii 22) Figure 1 1. 5 Figure 2 9 Tea Figure 3

Claims (1)

[Claims] There are four non-outlet nozzles provided at the lower part of the side wall of the tongue tissue for discharging the slag and slag remaining in the tongue tissue, and the discharge nozzle can be attached and detached from the outside of the side wall of the tongue tissue (with two presses). It consists of a truncated cone-shaped plug and a plug attachment/detachment means for holding the plug in the self-discharge nozzle and pulling it out from the discharge nozzle, and the plug attachment/detachment means is a tundish. A horizontal (bifurcated) fixed shaft is provided on the tongue tissue discharge nozzle side of the trolley, a rotatable second lever is provided on a part of the fixed shaft, and the other part of the fixed shaft (
a frame body which can be freely rotated once, a movable shaft provided parallel to the fixed shaft at an upper end C of the frame body, and a movable shaft fixed at a position corresponding to the upper end of the first lever of the movable shaft; a second lever, a link connecting the first lever and the second lever, a first cylinder for rotating the first lever about the fixed shaft, and a link for rotating the frame about the fixed shaft. A mechanism for discharging molten steel and slag remaining in a tongue tissue for a continuous casting machine, comprising a 27th ring for tilting and a plug connecting means attached to the movable shaft.