JPS62433B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a suction head used in an apparatus for suctioning slag on molten metal, cooling it to solidify it, and recovering it.

Conventionally, to form the suction head, the tip surface 2a of the mouthpiece 2 forming the slag suction port 1 was formed into a flat annular surface in the circumferential direction of the suction port 1, as shown in FIG. However, the annular nozzle 5 inside the mouthpiece 2
The cooling of the suction slag flow S by the jet water W ₁ from the slag becomes insufficient as the lumpy slag B is suctioned,
The granulation caused by cooling the slag tends to become unstable, and there was room for improvement.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to prevent the slag cooling function from being degraded due to lumpy slag suction, and to always perform stable and sufficient slag cooling.

The characteristic configuration of the present invention is that a plurality of fins are provided on the tip surface of the mouthpiece that forms the suction port for the slag on the molten metal, distributed in the circumferential direction of the suction port and extending in the radial direction of the suction port. Its effects are as follows.

In other words, we conducted various experiments to confirm how the slag is cooled in the suction head when the lumpy slag is adsorbed to the mouthpiece, and the following facts were found. That is,
As shown in FIG. 6, since a part of the slag suction port 1 is closed by the lumpy slag B, a high-speed suction air flow A is generated which is biased to one side with respect to the suction slag flow S.
Among the slag cooling water spouting areas from the annular nozzle 5, the high-speed air biased area becomes in a lower static pressure state than the rest, and due to the pressure difference, the slag cooling water jetting flow state changes, and the suction slag flow S A phenomenon in which the cooling water supply ratio becomes uneven, with more on the high-speed air biased region side and less on the opposite side, resulting in insufficient cooling of the side of the sucked slag flow S where the lumpy slag B is adsorbed. was confirmed.

Therefore, as shown in Figure 1, the mouthpiece 2
A plurality of fins 14 are provided on the tip surface 2a of the mouthpiece 2, so that even if the lumpy slag B is inhaled, the mouthpiece 2
Air suction gap 15 between the tip surface and the lumpy slag B
By making sure that the suction slag flow S is sufficiently formed, it is possible to reliably maintain good slag cooling in which the cooling water W ₁ is evenly supplied to the entire circumference from the annular nozzle 5 surrounding the suction slag flow S, and a good slag It has become possible to always perform stable granulation.

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 or the like, a mouthpiece 2 forming a slag suction port 1 is attached to an outer cylinder 3, and the mouthpiece 2 and a deep-spreading cylinder 4 attached to it are assembled. A first annular nozzle 5 is formed between the inner cylinder 6 and the deep-spreading cylinder 4, and a second annular nozzle 7 is formed between the inner cylinder 6 and the deep-spreading cylinder 4, so that the suction slag flow S from the suction port 1 can be The slag cooling water W ₁ is jetted from the first annular nozzle 5 and the slag cooling water W ₂ is jetted and supplied from the second annular nozzle 7 to granulate the slag by cooling and solidifying it. It is configured to be conveyed by suction air flow A.

A water supply channel 9 connected to a water supply device is formed between the outer cylinder 3 and the channel-forming cylindrical body 8, and the opening 1 of the cylindrical body 8 is
0, the water supply channel 9 is connected to the first and second annular nozzles 5 and 7 via a flow path 12 formed between the cylindrical body 8 and the cylindrical shutter 11, a gap between the shutter 11 and its seat 13, etc. It has been done.

A large number of fins 1 are provided on the tip surface 2a of the mouthpiece 2.
4 is dispersed in the circumferential direction of the suction port 1, and
The fins 14 are provided to extend in the radial direction, so that even if a part of the suction port 1 is attempted to be closed by the lumpy slag B when sucking the slag on the molten metal, the action of the fins 14 allows air to be sucked between the mouthpiece 2 and the lumpy slag B. The configuration is such that a gap 15 is formed, thereby suppressing an increase in the flow velocity difference of the suction air A around the suction slag flow S, and directing the slag cooling water W ₁ from the first annular nozzle 5 into the suction slag flow S. On the other hand, it is designed so that it can be supplied almost evenly over the entire circumference.

Next, another example will be shown.

The number of fins 14 to be installed can be determined as appropriate depending on the size of the lumpy slag.

The materials of the fin 14 and the mouthpiece 2 are iron,
It can be appropriately selected from other metal and non-metal materials such as graphite, ceramics, etc.

The dimensions of the fins 14 are preferably 5 mm or more in height and 2 mm or more in thickness, but the settings can be changed as appropriate, and the shape of the fins 14 can be changed into a plate shape, a rod shape, or various other changes. .

To attach the fins 14 to the mouthpiece 2, as shown in FIG.
As shown in FIG. , Finn 1
Other specific configurations can be changed as appropriate, such as making it easier to replace the parts 4 and 4.

Suction heads are mainly used to remove slag from molten metal in ladles and torpedo cars, but they can also be used to remove slag from molten metals and non-metals in various other processes.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
The figure is a view taken along the line - in FIG. 1. 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, 1
4...Fin.

Claims (1)

[Claims] 1. A suction head for sucking slag on molten metal, in which a plurality of fins 14 are distributed in the circumferential direction of the slag suction port 1 on the tip surface of a mouthpiece 2 forming the slag suction port 1. a suction head for removing molten metal slag, which is provided in a radial direction extending therefrom; 2. The suction head according to claim 1, wherein the fin 14 is detachably attached to the mouthpiece 2.