JP2811955B2 - Switching device for molten metal flow path - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a main flow gutter serving as a supply path for molten metal and two main flow gutters selectively connected to the main flow gutter in a metal ore refining furnace or the like. The present invention relates to a device for switching a molten metal flow path that connects one of tributary gutters.

[Related Art] Conventionally, in a metal ore refining furnace or the like, to switch a flow path of a molten metal as a molten metal ore, for example, first, a main flow gutter which is a flow path of a molten metal flowing down from a furnace body is used. Facing the discharge port, the inlets of the two tributaries are arranged, and the connection between one tributary gutter and the main gutter is blocked by a shield such as clay, so that the molten metal flows down to the other tributary gutter. I was letting it. When the flow path is switched, the shield that blocked one of the tributary gutters is removed, and a shield is installed on the other tributary gutter to close and close the same, thereby switching the flow path. Was.

[Problems to be Solved by the Invention] However, in such a switching of the molten metal flow path, a large amount of clay or the like is required to close the tributary gutter, or the molten metal starts from a position blocked by the shielding. It is difficult to completely stop the flow of the molten metal in a short time because of the possibility of overflowing, and there is a problem in the certainty of the switching. In addition, installation and removal of a shielding material such as clay at the time of switching the flow path of the molten metal are performed exclusively by hand, and improvement is required also from the viewpoint of safety. Furthermore, the shielding material such as clay installed in the tributary gutter is not completely removed and is deposited on the gutter, or the molten metal in the blocked portion is solidified, and a raised portion occurs at the bottom of the gutter. There is a problem that a so-called gutter bottom rises.

On the other hand, the gutter, which is the flow path of the molten metal, is closed as much as possible by covering the upper part of the gutter with a lid so that the flow of air is generally shut off in order to keep the temperature of the molten metal and prevent oxidation. ing. However, in the conventional molten metal flow path switching, in order to install or remove a shield such as clay when switching the flow path,
This closed state had to be released, and there was a risk that the temperature of the molten metal would drop or that the molten metal would be oxidized. As described above, when the temperature of the molten metal falls, the flowability of the molten metal may be reduced and the molten metal may be solidified. Therefore, the molten metal must be reheated. Also, if the molten metal is oxidized, it may affect the quality of the refined metal.

Means for Solving the Problems The present invention has been made to solve the above problems, and has a main flow gutter and two tributary gutters arranged with one end facing the discharge port of the main flow gutter. And a switching valve that selectively connects the main gutter to one of the tributaries, and a tributary gutter cover that opens toward the switching valve is provided on the tributary gutter, and the switching valve is disposed below the outlet of the main gutter. A branch gutter laid over the tributary gutter, and arc-shaped plate-shaped shielding walls provided above and below the molten metal discharge opening of the branch gutter are provided integrally and tiltably about the discharge opening of the main flow gutter. It is characterized by having a configuration.

[Operation] In the present invention, the main gutter and one of the two tributaries are alternately connected by the tilting operation of the branch gutter constituting the switching valve, and the tilt of the branch gutter is controlled by a driving device or the like. By doing so, the molten metal flow path can be switched smoothly in a short time without manual intervention.

Further, in the present invention, a branch gutter cover is provided at the molten metal inlet of the tributary gutter, while a branch gutter is provided above and below the molten metal outlet of the branch gutter connected to the molten metal inlet of the tributary gutter. An arc-shaped plate-shaped shielding wall that tilts integrally is provided. By setting the gap between the tributary gutter cover and the shielding wall to the minimum necessary, the branch gutter can be tilted and the molten metal flow path can be tilted when the branch gutter is connected to one of the tributaries. It is possible to keep the branch gutter and the tributary gutter close to a sealed state at all times even during the switching.

[Embodiment] The attached drawing is a partially broken perspective view showing an embodiment of the present invention.

This is the main gutter 1 that guides the molten metal M flowing down from the furnace body or the like.
And two branch gutters 2, 2 branched from the main gutter 1 at a right angle in plan view, and a switching valve 3 provided at a branch point between the main gutter 1 and the branch gutters 2, 2.

The main flow gutter 1 and the tributary gutters 2, 2 are provided to be inclined in a vertical plane view, and have a structure in which the molten metal M flows down by gravity. And the molten metal inlets 2a, 2a of the tributaries 2, 2,
Are provided with triangular tributary gutter covers 2b, 2b each having one surface opened toward the switching valve 3.

The switching valve 3 includes a branch gutter 4 and a shielding wall 5.

The branch gutter 4 is an inverted T-shaped hollow member connected perpendicularly to the main gutter 1 in a plan view, and has a molten metal discharge port 1a of the main gutter 1 in a horizontal direction at an upper portion thereof. On the other hand, the lower portion has both ends projecting and opening into the tributary gutter covers 2b, 2b, and serves as a molten metal outlet 4a of the branch gutter 4. The branch gutter 4 and the main gutter 1
And a support shaft 6 provided on the opposite side of the joint. The support shaft 6 includes a support column 7
And is connected to a driving device (not shown). On the other hand, the junction between the branch gutter 4 and the main flow gutter 1 is such that the branch gutter 4 is rotatable with respect to the main flow gutter 1 and the gap between the branch gutter 4 and the main flow gutter 1 is in a state in which both are close to a closed state. It is set to the minimum necessary to be retained. Then, the branch gutter 4 is driven by the driving device described above.
The support shaft 6 can be tilted about an axis in a vertical plane. The driving device is provided with a fixing device (not shown) for holding the switching valve 3 in a tilted state.

The shielding wall 5 is an arc-shaped plate centered on the support shaft 6 and provided from above one molten metal outlet 4a of the branch gutter 4 to below the other molten metal outlet 4a through the branch gutter 4. It is a member of. On the other hand, the openings of the tributary gutter covers 2b, 2b facing the shielding wall 5 are also formed in an arc shape centering on the support shaft 6, and the tilting operation of the switching valve 3 causes the shielding wall 5 and the tributary gutter to move. The cover 2b, 2b does not interfere with each other, and the gap between the opening of the tributary gutter cover 2b, 2b and the shielding wall 5 keeps the tributary gutter 2 and the branch gutter 4 close to a closed state. It is set as follows.

Openings 2c, 2c, 4b are formed above the tributary gutter covers 2b, 2b and the branch gutter 4, respectively. The tilting operation of the switching valve 3 is performed from above these openings 2c, 2c, 4b. Are hung down and inserted so as not to interfere with the burners.

In the molten metal flow path switching device having such a configuration, the switching valve 3
Is held by the fixing device in a state where it is tilted,
Is connected to one of the branch gutters 2, and the molten metal M flows down the main gutter 1, the branch gutter 4 and the one of the branch gutters 2 by gravity to form a molten metal flow path. When the molten metal flow path is switched from one tributary gutter 2 to the other tributary gutter 2, the switching valve 3 is switched by the driving device until the inclination of the branch gutter 4 is reversed with respect to the vertical plane including the support shaft 6. After tilting, the tilting of the switching valve 3 may be held by the fixing device. Thereby, the molten metal M flows down from the main flow gutter 1 to the other tributary gutter 2 through the branch gutter 4, so that the flow path of the molten metal is switched.

As described above, in the present invention, a tiltable switching valve is provided at a branch point between the main flow gutter and the tributary gutter, and the molten metal flow path is switched by the tilting operation of the switching valve. Therefore, the molten metal does not flow into the branch gutter to which the branch gutter is not connected, and the molten metal flow path can be reliably switched. Also,
Unlike the conventional example described above, since a shielding material such as clay is not required, it does not accumulate on the gutter and rise up.
Further, since it is not necessary to manually switch the molten metal flow path, the labor conventionally used for installing and removing the shield can be eliminated, safety can be improved, and the time required for switching can be improved. Since it is shortened, it is possible to improve the working efficiency.

Further, in the present embodiment, an arc-shaped plate-shaped shielding wall 5 centering on the support shaft 6 is provided above and below the molten metal outlet 4a of the branch gutter 4, while the molten metal inlet 2a of the tributary gutters 2, 2 is provided. , 2a are provided with tributary gutter covers 2b, 2b each having an arc-shaped opening centered on the support shaft 6. The gap between the openings of the tributary gutter covers 2b, 2b and the shielding wall 5 is
It is set to the minimum necessary so that the tributary gutter 2 and the branch gutter 4 maintain a state close to a closed state.

According to the molten metal flow path switching device having such a configuration, first, in a state where the switching valve 3 is tilted and the main flow gutter 1 is connected to one of the tributary gutters 2, one molten metal of the branch gutter 4 is used. The outlet 4a is connected to the melt inlet 2a at a position below the tributary gutter cover 2b of the tributary gutter 2 and is connected to the tributary gutter 2.
The opening of the tributary gutter cover 2b opened above the molten metal inlet 2a is shielded by a shielding wall 5 provided above one molten metal outlet 4a of the branch gutter 4. On the other hand, the other molten metal discharge port 4a of the branch gutter 4 is located above the tributary gutter cover 2b of the other tributary gutter 2, and the lower tributary gutter cover 2b is opened.
The opening 2b is shielded by a shielding wall 5 provided below the other molten metal outlet 4a of the branch gutter 4.

Next, when the switching valve 3 is tilted to switch the molten metal flow path, one molten metal outlet 4a of the branch gutter 4 connected to the molten metal inlet 2a of the one branch gutter 2 is The inside of the branch gutter cover 2b of the branch gutter 2 moves upward from below, and conversely, the other molten metal discharge port 4a of the branch gutter 4 moves from the top of the branch gutter cover 2b of the other branch gutter 2 upward. Since it moves downward and is connected to the molten metal inlet 2a of the other tributary gutter 2, the respective molten metal outlets 4a, 4a of the branch gutter 4 during this tilting operation.
Openings of the tributary gutter covers 2b, 2b are opened above and below. However, the shielding wall 5 tilts integrally with the branch gutter 4, and its shape is an arc-shaped plate centered on the support shaft 6 which is the center of the tilting, while the tributary gutter cover 2 b facing the shielding wall 5. , 2b also form an arc vertically about the support shaft 6, so that the tilting operation of the switching valve 3 does not cause interference between the shielding wall 5 and the support shaft covers 2b, 2b.
Further, the gap between the two is set to a minimum necessary so that the branch gutter 4 and the tributary gutter 2 maintain a state close to a closed state. It will be in a shielded state. Further, at the junction between the main flow gutter 1 and the branch gutter 4, as described above, the gap between the two is set to a minimum necessary so that the two maintain a state close to a sealed state.

As described above, according to the present invention, the molten metal flow path is formed even when the switching valve is tilted during the switching of the molten metal flow path as well as when the molten metal is flowing down. The main gutter, the branch gutter, and the tributary gutter can be maintained in a state close to a sealed state. As a result, it is possible to prevent the temperature of the molten metal from dropping due to contact between the molten metal and the outside air, and it is not necessary to reheat the molten metal, so that heat energy can be saved and energy efficiency can be improved. Further, the oxidation of the molten metal can be prevented, and the quality of the metal to be refined can be stabilized.

In the present embodiment, openings 2c, 2c, 4b are provided above the tributary gutter covers 2b, 2b and the branch gutter 4, respectively, and burners 8 are provided here to heat the molten metal M. Accordingly, the molten metal M which may flow down the main gutter 1 to lower the temperature is prevented from being solidified by reheating the molten metal M, and the molten metal M flows down when the switching valve 3 is tilted. There is an advantage that it is possible to prevent the molten metal M from adhering to the molten metal discharge port 4a of the tributary gutter 2 or the branch gutter 4 which is not solidified and solidifying, thereby causing the bottom of the gutter to rise.

[Effects of the Invention] As described above, according to the present invention, the switching of the molten metal flow path can be reliably performed in a short time without manual operation, thereby improving work efficiency and safety. In addition to this, it is possible to prevent the bottom of the gutter from rising due to the installation of a shield such as clay.

Further, not only when the switching valve is fixed in a tilted state and the molten metal is flowing down, but also when the switching valve is tilted and the molten metal flow path is being switched, the main flow gutter, the branch gutter, and the tributary flow. The gutter is maintained in a state close to a closed state, and the temperature drop and oxidation of the molten metal are prevented, so that the energy efficiency can be improved and the quality of the metal to be refined can be stabilized.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are perspective views, partially cut away, showing one embodiment of the present invention. 1 ... main gutter, 1a ... melt outlet of main gutter, 2 ... tributary gutter, 2a ... melt inlet of tributary gutter, 2b ... tributary gutter cover,
3 ... Switching valve, 4 ... Branch gutter, 4a ... Metal discharge port of branch gutter, 5 ... Shield wall, 6 ... Support shaft, 7 ... Support column, M ...
... Molten metal.

Claims (1)

(57) [Claims] 1. A main flow gutter, two tributary gutters arranged with one end facing an outlet of the main flow gutter, and a switching valve for selectively connecting the main flow gutter to one of the tributary gutters. The tributary gutter is provided with a tributary gutter cover that opens toward the switching valve, and the switching valve includes a branch gutter disposed across the tributary gutter below an outlet of the main gutter. An arc plate-shaped shielding wall provided above and below the molten metal discharge port of the branch gutter is integrally and integrally provided so as to be tiltable around the discharge port of the main flow gutter. Switching device.