JPS6227347B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a slag removal device for removing slag floating on the surface of molten metal in an induction melting furnace.

In recent years, electric melting equipment using induction heating has been widely adopted for melting steel materials and nonferrous metal materials due to pollution problems, labor savings, and improvement of the working environment. Another great advantage of induction melting is that the molten metal can be of high quality because of the stirring action.
However, although induction melting melts in a short time, the melted material comes into contact with the atmosphere during melting and oxidizes.
Impurities contained in the molten metal material become slag, which floats on top of the molten metal. This slag is consciously generated to some extent depending on the metal,
In some cases, the molten material is effectively used to prevent further oxidation, but even in this case, when pouring the molten metal into a mold or the like, this slag is removed before pouring. At present, this slag removal work has to rely on manual work, and the worker uses a ladle-shaped tool in his or her hand to remove the slag. For this reason, workers have to go near the molten metal and have to be exposed to high temperature and dangerous conditions, and the work cannot be done efficiently because it is done manually.

The present invention eliminates the above drawbacks, eliminates the need for workers to get close to the molten metal, and makes it possible to safely, efficiently, and reliably remove slag floating on the molten metal without exposing the workers to danger. The object of the present invention is to provide a slag removal device.

An embodiment of the present invention will be described below with reference to the drawings.

In Fig. 1, an induction melting furnace 1 has a water-resistant material 1a and a heating coil 1b for constructing a crucible, and a dish-shaped slag remover 3d is attached to the upper part of the induction melting furnace 1 by a hinge 3e.
and attach it to hinge 3b with pin 3g. Attach the cylinder 4 to the hinge 3c of the rotating frame 3a, which has hinges 3b, 3c and a rod 3f, with a pin 4c.
By attaching the hinge 4b to the tip of the rod 4a of the cylinder 4 and attaching this to the slug remover 3d, the slag remover 3d can be moved as shown by the solid line at the forward limit of the rod 4a of the cylinder 4 and the chain line at the backward limit. Perform rocking motion. Also Rod 3
If the worm gears 6a and 6b are attached to f and are fixed to the elevating frame 5a with bearings 5c and 5d, the rotating frame 3a can be rotated by rotating the worm 6b with a motor or the like. Swivel device 3 having the above
A lateral movement device 7 having a lateral movement mount 7a on which a wheel 7b is attached by a cylinder 8, a bearing 7d and a shaft 7c, a rail mount 10 supporting this, and a hinge 8d attached to the tip of a rod 8a of the cylinder 8. A lifting device 5 is connected to a lifting frame 5a having a guide 5b, and is raised and lowered by a cylinder 8.
It consists of

Next, the operation of the present invention having the above configuration will be explained. Second
6 to 6 are drawings showing the operational sequence of the present invention. FIG. 2 shows a crucible 1c made up of the center of the rod 3f of the turning device 3 and the refractory material 1a of the induction melting furnace 1.
The lateral motion device 7 is installed so that the centers of the
The cylinders 4 and 8 are set to the backward limit, the elevating device 5 is set to the upper limit, and the slag remover 3d is tilted, indicating a preparation state for removing the slag 2a floating on the molten metal 2 in the crucible 1c. From this state, when the cylinder 8 is advanced and the elevating device 5 is lowered, the state shown by the solid line in FIG. 3 is reached. From this state, when the cylinder 4 is moved to its forward limit, the slag remover 3d swings as shown by the chain line in FIG. Cylinder 8 from the state shown by the chain line in Figure 3
When the elevating device 5 is raised at , it becomes as shown in FIG. 4. At this time, the slag 2a floating on top of the molten metal 2
The removed slag 2a' is scooped up and placed on the slag removal tool 3d. Then, the wheels 7b of the lateral movement device 7 are rotated by a motor, cylinder, etc.
As shown in the figure, the lateral movement device 7 is moved to the slag loading mobile trolley 9.
move it to the top. If the slag removing tool 3d placed above the head of the slag loading mobile cart 9 is placed in the state shown by the chain line in FIG. It is housed in a mobile cart 9. From this state, the rotating device 3 is rotated by the worms 6a and 6b, and the moving device 7 is moved to the top of the induction melting furnace 1 to a state similar to that shown in FIG. 2, as shown by the solid line in FIG. (Figure 6 shows the state in which the rotation device 3 is rotated 180 degrees with respect to Figure 2.) Below, as described above, the third
As mentioned in Fig. 5, the slag 2 floating on the molten metal 2 is
It is possible to scoop up and remove enough a. In addition, as shown in FIG. 7, the electrode (or thermocouple) 20 is attached to the rotating base 3a of the rotating device 3 using the mounting base 21, so that the upper surface of the slag remover 3d sinks by an optimal dimension h2 with respect to the upper surface 2y of the molten metal 2. By adjusting h1, it will be possible to detect the state in which the electrode (or thermocouple) 20 is in contact with the slag, and if the cylinder 8 is operated based on this signal, the lifting device 5 will automatically operate regardless of the height of the molten metal 2. It becomes possible to operate the system. Furthermore, if the slag remover 3d is made of refractory material or metal and shaped like a dish with a hole 3y with an edge, as shown in FIG. 8, the molten metal will not be removed together with the slag 2a. If the slag remover 3d is tilted and a part of the slag remover 3d is put into the molten metal 2 and rotated, the slag will be collected in one place. Note that the turning device 5 in the above embodiment includes worms 6a, 6.
Instead of b, it is also possible to use a Geneva device, a pinion rack, or a lever to effect the rotation by stroke action of the cylinder. Furthermore, the lifting device 7
It is also possible to move up and down using a screw or rope instead of the cylinder 8.

As described above, according to the present invention, a dish-shaped slag remover that can be oscillated and rotated and a device that moves it up and down and horizontally are provided, and the slag in the furnace is scooped up by this slag remover, so that work can be carried out. It is possible to obtain a slag removal device that can safely, efficiently, and reliably remove slag on molten metal by remote control or automatic operation without a person getting close to the molten metal.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
6 to 6 are cross-sectional views showing the operating order of the present invention,
FIG. 7 is a front view showing another embodiment of the present invention;
The figure is a perspective view of the same. 1...Induction melting furnace, 1b...Heating coil, 2...
...molten metal, 2a...slag, 2a'...(removed) slag, 3...swivel device, 3a...swivel frame, 3d
...Slag remover, 4... (tilting) cylinder, 5... Elevating device, 5a... Elevating frame, 7...
Lateral movement device, 7a... Lateral movement frame.

Claims (1)

[Claims] 1. A swingable dish-shaped slag remover that is immersed in the molten metal of the induction furnace and scoops up the slag floating on the molten metal, a rotating mount that swings and rotates the slag remover, and a rotating mount that raises and lowers the slug remover. In a slag removing device consisting of an elevating device and a horizontally moving frame for horizontally moving the elevating device, a cylinder 4 is rotatably attached to the rotating frame, and one end is housed in the cylinder 4 and the other end is attached to the rotating frame. A slag removing device comprising a rod 4a rotatably attached to the slag remover, and a hinge 3c and pin 3g for rotatably attaching the slag remover to the rotating frame.