JPS6053777A - Suction head 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 an improvement in a suction head used in an apparatus for sucking a slab on molten metal, cooling it, solidifying it, and recovering it.

Conventionally, to form the above suction head.

@6 As shown in Figure 6, the tip surface (2a) of the Max Piece (21) forming the slag suction port (1) was formed into a flat annular surface in the local direction of the suction port +0. Yes, but
Cooling of the suction slag flow (S) by the jet water (Wl) from the annular nozzle (6) inside the mouthpiece (2) becomes insufficient as the lumpy slag IBI is sucked, and the slag becomes granulated due to cooling. was prone to instability, and there was room for improvement.

In view of the above-mentioned circumstances, an object of the present invention is to always perform stable and sufficient slag cooling without reducing the slag cooling function due to lumpy slag suction.

The characteristic configuration of the present invention is that the top surface of the mask piece forms a suction port for the slag on the molten metal.

The plurality of fins are provided so as to be distributed in the opening direction of the suction port and extend in the radial direction of the suction port, and the effects thereof are as follows.

“In other words, when lumpy slag is adsorbed to Max Piece,
Various experiments were carried out to confirm the slag cooling condition within the suction head, and the following facts were found.

That is, as shown in FIG. 6, since a part of the slag suction port (1) is torn by the lumpy slag fBl, the high-speed suction air flow fA is biased to one side with respect to the suction slag flow fS).
1 occurs, and among the slag cooling water jets from the annular nozzle (5), the high-speed air bias area is lower than the rest, creating a static pressure chamber, and due to the pressure difference, the slag cooling water jets flow rate changes. As a result, the ratio of cooling water supply to the suction slab flow [Sl] becomes uneven, with more on the high-speed air biased region side and less on the opposite side, and lumpy slag iBl is adsorbed in the suction slag flow [51]. It was confirmed that the cooling on the exposed side was insufficient.

Therefore, as shown in FIG. 1, a plurality of fins I are provided on the tip surface (2a) of the max piece (2), so that even if a lumpy slab [131] is sucked, the tip of the max piece (2)
After making sure that a sufficient air suction gap is formed between the surface and the lumpy slag IBI, cooling water (Wl ), it is possible to reliably maintain good slag cooling, and it has become possible to consistently and stably granulate the slab.

Next, an example will be shown with reference to FIGS. 1 and 2.

To configure a suction head connected to a suction device via a granulated slag separator, etc., a mouthpiece (2) forming a slag suction port (1) is attached to an outer cylinder 13)K, and a mouthpiece (2) is connected to the mouthpiece (2). Deep expanding sieve body (4
) and the first annular nozzle (III) in hl.

In addition, a modified annular nozzle 17) is formed between the inner cylinder (6) and the deeply expanding cylinder body (4), and the suction slag flow from the suction port (1) (from the entire circumference with respect to Sl, 1 annular nozzle +51
The slag cooling water (Wl) from the second
The slag cooling water (W2) is jetted and supplied from the coral nozzle (7), and the slag is cooled and solidified to become granular, and the slag is granulated to the suction port (1).
It is configured to be conveyed by a suction air flow (from).

A water supply @ (9) connected to the water supply device is formed between the outside saki (3) and the flow path forming cylindrical body (8), and the opening (1α of the $2 cylindrical body (8), the cylindrical body ( 8) and the cylindrical shutter (11) through the gap between the flow path αz1 shutter 1■1) and its seat 03)
1 Connect the water supply channel (9) to 71.

A large number of fins I on the tip surface (2a) of the mouthpiece (2).
are dispersed in the direction of the suction port (1), and the suction port +11
Even if a part of the lumpy slag (suction port fl due to Bl) attempts to close when the slag is sucked onto the molten metal, the mouthpiece (
2) Air intake gap (I5) between the lumpy slag (Bl)
is formed so that a suction slag flow (S
This is to suppress the increase in the difference in flow velocity of the suction air around the first annular nozzle il+, and to supply the slag cooling water (Wl) from the first annular nozzle il+ to the suction slab flow 1sI almost uniformly over the entire circumference.

Next, another example will be shown.

The number of fins (2) to be installed can be determined as appropriate depending on the size of the lumpy slag.

The material of the fin 0 and the mouthpiece til+ can be appropriately selected from iron, graphite, ceramics, and other metal and nonmetal materials.

The dimensions of the fin 04) are preferably smm or more in height and about 100 yen in thickness, but the settings can be changed as appropriate. Various other changes are possible.

When attaching the fin A4 to the mask piece (2), as shown in Fig. 3, it may be inclined with respect to the radial direction of the intake port FTL, or as shown in Fig. 4, the fin 041 may be arranged in a curved radial shape. % As shown in Fig. 5, the fins A4 are removably inserted into and connected to the widening groove flllfl formed in the mask piece (2).

Fix fin Q41 with screw αη and remove fin 04.
Other specific configurations can be changed as appropriate, such as making it easier to replace the 1.

The main use of the suction head is to remove slabs from metal sinks inside ladles and torpedo cars.

It can also be used to remove slag from molten metals and non-metals in various other processes.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 #'i
2 is a view taken along the line ■-■ in FIG. 1. FIG. FIGS. 3 to 5 are main part views showing different embodiments of the present invention, respectively. FIG. 6 is a sectional view showing a conventional example. (1)...Slag inlet, (2)...Mouthpiece. (141...Fin. Figure 2, Figure 4, Figure 3, Figure 5, No. 2)

Claims (1)

[Claims] ■ A suction head that sucks slag on the molten metal, and a maxpiece (2) forming a slag suction port (1).
A plurality of fins Q41 are attached to the tip surface of the slab suction port i.
1) A suction head for removing molten metal slag, which is provided in a state where it is distributed in the local direction and extends in the radial direction. ■ The fin H can be attached and detached from the Max Piece (2).
The suction head according to claim 0, which is attached to a suction head.