JPS6036885A - Device for removing molten metal slag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molten metal slag removal device equipped with a suction head for sucking molten metal slag.

In the above-mentioned molten metal slag removal equipment @, the suction head is lowered at 1 to a set suction height close to the slag above the molten metal to start slag suction, but the slag surface becomes highly viscous and becomes a so-called skinned state. If so, the slag surface may become a problem and slag suction may not start.

Therefore, in the past, the suction head was moved closer to the slag surface and the slag surface was broken by the suction force of the suction head, but the moment the slag surface was broken, more slag than the set amount was sucked in. Because of this, a large amount of water vapor is suddenly generated when the slab is cooled by 11n of cooling water coming out in one suction head, and due to this, the vacuum helmet in the suction system passage becomes large. There was a problem that the slag suction became unstable due to the drop in pressure or the temporary change to positive pressure, which resulted in smooth suction of the slag.

In view of the above-mentioned circumstances, the object of the present invention is to make it possible to perform 2[t slag suction by rationally improving the suction head, regardless of the high viscosity of the slag table 1m on the molten liquid and jr. At the point.

The characteristic configuration of the present invention is that a dark john head for suctioning and removing slag from molten metal L is attached to a bubbling nozzle for warping the surface of the slag made into 11 viscosity so that it can move in and out of the front of the suction port. In addition, it is connected to an air supply device, and its functions and effects are as follows.

In other words, the slag suction is cooled once and bug rings/zur are blown into the slag above the molten metal, and in this state, gas is jetted into the slag from the bubbling nozzle to break the highly viscous slag surface, and the slag is removed by the suction head. It makes suction a rjj function.

That is, by moving the thin film bag ring nozzle to the suction head in front of the
111 is also suitable for slag suction with Zakujon head f(
It is possible to break the slag surface accurately, and it is possible to break the slag surface while positioning the suction head itself above the set suction height relative to the slag, at a height where slag cannot be sucked. Unexpected multi-1□1 slag suction immediately after bale ff1i crushing? (In fact, it was possible to avoid the troubles caused by the generation of high Fi', f water vapor caused by this, and as a result, it was possible to perform slag suction as smoothly as when there was no skinning).

By the way, in order to crush the slag surface that has become highly viscous, it may be possible to equip it with a stirring blade type crushing device.
When the crushing device is attached to the suction head, the suction head becomes larger and the suction head becomes larger. If equipped in 1.11 locations other than 1[;, appropriate 1.
There is a drawback that 6% of each wave is carried out at one place (・ζ becomes difficult, and furthermore, it is damaged).

In addition, when using such a crushing device, the suction head should be adjusted to the I9. It became necessary to evacuate the material to a position that does not interfere with the rotation of the undergarment, and for this purpose, after the crushing is completed, return the soak john head to the specified position and shake it. It is particularly time consuming and has low work efficiency, and also has the disadvantage that in the case of a bad operation, peeling/tripping occurs again during the recovery process, resulting in a 1~1 error.

According to "Honsutsu", 1 month a month. Since the nozzle is only installed on one suction head, the suction head part can be firmly held, and the fractured area can also be 4i 9J K (!-, and even 1°). Since the nozzle plunges into the slag and blows out gas only when crushing gold, it has the advantage that operational troubles such as those caused by entanglement of the slag (Table 1) are less likely to occur.
Since the slag is crushed directly under the suction port of the Zakujo head, it is possible to quickly shift to slag suction after crushing is completed, improving production efficiency and preventing skinning from occurring again during the transition. It also has the great advantage of being easy to store and reliably sew.

In summary, it has been possible to provide a molten metal slag removal device that has excellent slag suction and removal performance and is extremely practical.

Next, the present invention will be described in detail based on illustrative figures.

Figure 1 shows the suction head i+t (k shown, link mechanism +l) in the molten metal slag removal device.
A suction head (2) defined by ll1lJ and horizontally movable t is brought close to the slag (5) floating on the ladle (3) or the molten metal (4) in the torpedo car, and the slag (5) is At the same time, cooling water supplied from a cooling water supply pipe (6) is ejected in the suction head (2) to solidify the crotch pulling slag into powder.

Then, the solidified slag, additional cooling water, air, and water vapor generated during slag cooling are transferred in a three-phase state through the suction pipe (7), and the solidified slag is processed in the post-processing section. Sharing ``Recovering'' is Buddha-achievement.

A rod-shaped long bubble link nozzle (8) is attached to the suction head (2) so that it can be moved in and out from the air cylinder (91K) in front of the suction port (2a) of the suction head. Prior to the slag suction by the head (2), the bag ring nozzle (8) (11″% 'IJjy
1 into the slag (5), and blows compressed air into the slag from the plunge tip of the bag ring nozzle (8) to crush the highly viscous slag surface, which is in a so-called skinned state.
The structure is such that smooth slag suction removal can be performed without disturbing the skin-like slag surface.

In configuring the compressed air supply structure for the bubbling nozzle (8), the bubbling nozzle (8) and the compressed air supply compressor (101) are connected to the first 'ii:j i
19 On-off valve (Ill) is connected to the first electromagnetic on-off valve (11) which is connected by an air pipe (12) and has a second electromagnetic on-off valve (+3) and variable throttle valve 04 interposed in series. A bypass pipe (15) is provided, so that when the pulling nozzle (8) is inrush operation, the second electromagnetic on-off valve (only the valve is opened) and only a small amount of 1FW4 air is supplied, and the bagling nozzle The increase in air pressure in the pipe (+2) l (+5) due to the intrusion of the slag in (8) is detected by the pressure switch (+6) attached to the Noku Innosu pipe (15), and based on the detection result. 7th
The electromagnetic on-off valve (11) is configured to automatically open to supply a large amount of compressed air for crushing the slag surface.

First, it prevents the supply of a large amount of compressed air before the bag ring nozzle enters, and prevents the slab from scattering due to the compressed air jet, improving safety and automatically supplying a large amount of compressed air at the appropriate timing. Part 1~゛! The aim is to improve productivity.

In addition, (171・It8) in the figure is a one-way valve for preventing backflow, and (19) is an IJ IJ- for compressed air pressure setting.
It has 7 valves.

To configure the compressed air jetting structure of the bubbling nozzle (8), 1, as shown in FIG.
The tip of the bug ring nozzle ( 8) prevents the slug from being press-fitted into the nozzle and causing the nozzle (8) to squeak, and also enables compressed air to be effectively blown into the slag near the nozzle tip;
It is borrowed to improve the slag crushing performance of the bubbling nozzle (8).

Lowering and lateral movement of the suction head (2), and
To explain in more detail the compressed air jetting structure of the bubbling nozzle (8), as shown in Figs. It is known that the controller (2→ is operated to lower the suction head (2) at the rising and retiring height Hl), and in conjunction with that, the actuating valve (9a) for the air cylinder (9); Then, the first electromagnetic on-off valve (13) is automatically operated to project the bag ring nozzle (8) in a state where a small amount of compressed air is released. When (8) enters the slag above the molten metal (5), based on the information from the Moe NQ pressure switch (16), the cooperative/electromagnetic on-off valve (11) is opened to start crushing the slag surface; Almost simultaneously, set the descending speed (V) of the suction head (2) to low speed (Va).
The VC is configured to switch K and operate the slag surface crushing time (ta) and character timer (T)'. Based on the information from the timer (T), when the time has elapsed and the slag surface has been completely crushed, the air injection valve (9a) is activated.
The switching/retirement of the pulling nozzle (8) is made (fs'), and the setting time delay (tb) is set for the retirement of the pulling nozzle (8) (fs'). At A, go to the 1st city, and connect the magnetic opening/closing valves (11) and 113) together with l''PJ.
K kN is provided to ensure the same operation.

The set low speed (Va) is set so that the suction head (2) reaches a high force (a safe height H, at which slag cannot be sucked yet) at time 77' of the timer (T'). At the moment the surface is torn, many fjt
This is to prevent slag from being sucked in.

After the slag surface is crushed, the suction head (2) is continuously lowered to start suctioning the slab, and as the suction head (2) is lowered, the electrode rod (2) attached to the suction head (2) is lowered.
3) comes into contact with the molten metal upper slag (5), the suction head (2) reaches the preset steady suction height H3), and the information from the power rod (4) Automatically stop the Zakujon head (2) based on;
< , 1jjj (rod (23) f self + tlj l n
After that, the suction hand (2
1. The structure is such that steady suction of the slag is controlled by the tightening part C.

The specific shape and structure of the bubbling nozzle (3) can be improved in various ways, and the suction head suction bow 10 (
2a) Concrete output j1-^kizo for iij 'hK,
In addition, various improvements can be made to the entry/exit operation structure.

Furthermore, instead of providing a dedicated combustor for the device that supplies compressed air or other gas for slag surface crushing to the bag ring nozzle (8), the exhaust pressure of a suction device that applies slag suction pressure to the suction head (2) K is used. Various improvements can be made such as by using air supply equipment (1).
0).

Furthermore, a bag ring nozzle (8) and a suction head (2
), as well as the specific linked sweep structure, can be changed in various ways by FT.

[Brief explanation of drawings]

The drawing is almost complete (molten metal slag removal device “1g” related to 3y4)
Examples are shown in FIG.
Figure 2 is an enlarged sectional view of the tip of the bag ring nozzle, and Figure 3 is a time sheet for the slag suction operation. (2)...Suction head, (2a)...
ul1 mouth, (4)...molten metal, (5)...slag, (
8)・・・Bubbling Figure 3

Claims (1)

[Claims] A suction head (2) for suctioning and removing the slag (5) on the molten metal (4) is provided with a bubbling nozzle (8) for breaking the highly viscous slag surface in front of the suction port (2a). A molten metal slag removal device which is retractably attached and connected to an air supply device (1O).