JPS6247199Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a microwave melting furnace whose crucible can be used repeatedly.

One type of heating and melting furnace using microwaves is an ink-melt type, in which a metal crucible is used, and a material to be processed is fed into the crucible and heated and melted. In this method the melt solidifies in a crucible.

An example of the application of this type of melting furnace is the melting and solidification volume reduction treatment of radioactive waste (for example, incineration residue and incineration ash of combustible miscellaneous solid waste generated at nuclear power plants). In this case, the molten and solidified material is taken out from the melting furnace together with the metal crucible and stored as is or in a drum can and stored at a storage facility. Therefore, the crucible becomes a one-time disposable item.

If the crucible can be used repeatedly, running costs can be reduced, and if only the solidified material is stored, more solidified material can be stored in the drum, which also reduces the amount of waste generated by used crucibles. This is desirable from a practical point of view.

This invention was made to solve such conventional problems, and made it possible to reduce running costs by making the crucible a reusable structure.

That is, this invention provides a microwave melting furnace having an upper furnace body and a lower furnace body equipped with a crucible for accommodating and melting and solidifying the workpiece, in which the lower furnace body is rotatable by 180 degrees with respect to the cart. The carriage is configured to be movable in the horizontal direction relative to the upper furnace body, and includes means for moving the carriage, means for pressing the lower furnace body against the upper furnace body, and means for rotating the lower furnace body. The apparatus includes a means for extruding the solidified material in the lower furnace body, a means for extruding the solidified material in the lower furnace body, and a storage container for accommodating the extruded solidified material.

Embodiments of this invention will be described below with reference to the drawings. In FIGS. 1 and 2, an upper furnace body 2 is attached to a frame 1, and an upper furnace body 2 is attached to the frame 1.
A rail 3 is arranged in the lateral direction. Further, a lower furnace body 5 is disposed below the upper furnace body 2, and is held by a cart 4 running along a rail 3, as will be described later.

The truck 4 is driven by an air cylinder 13, and a cleaning device 21 is attached to the truck 4, so that the cleaning device 21 cleans the upper furnace body 2 while the lower furnace body 5 discards the solidified material. . An air cylinder 11 for pressing the lower furnace body 5 against the upper furnace body 2 is arranged below the upper furnace body 2, and the trolley 4 moves to position the cleaning device 21 under the upper furnace body 2. The storage container 10 is placed in a position facing the lower furnace body 5 in the state where
is arranged, and a lower furnace body 5 is placed above it.
A power cylinder 14 is arranged to push out the solidified material inside.

As shown in FIGS. 3 and 4, the lower furnace body 5 includes an outer frame 51, an inner frame 52, a heat insulating material 53 installed in the inner frame 52, and a crucible 6 disposed inside the outer frame 51. A discharge valve 8 supported by a spring 88 is provided at the bottom of the inner frame 52, thereby closing the bottom of the crucible 6. The discharge valve 8 consists of a valve body 81, an actuating plate 83, and a connecting rod 82 that connects these.
By pressing against the force of , the solidified material in the crucible 6 is pushed out by the valve body 81.

The inner frame 52 is configured to be vertically movable by sliding both side surfaces thereof along a sliding surface 54. A trunnion 50 is provided outside the outer frame 51 and is rotatably attached to the frame 41 of the truck 4, so that the lower furnace body 5 is configured to be rotatable with respect to the truck 4. Further, the cart 4 is provided with wheels 42, and as these wheels roll along the rails 3, the cart 4 moves along the rails 3. Also,
A gear 7 is provided on the outside of the outer frame 51, and by meshing with a rack 12 provided on the frame body 1, the lower furnace body 5 is configured to rotate as the cart 4 moves.

FIG. 5 shows another embodiment of this invention, the basic configuration of which is the same as the one described above, but a device for coding to improve the discharge of the solidified material is arranged in the solidified material discharge section. has been done. That is, the coating agent spray device 9 has a base 9 of the spraying part.
Nozzle 9 at the tip of conduit 92 rotatable around 1
3 is configured to face the crucible 6 of the inverted lower furnace body 5.

FIGS. 6 and 7 show still another embodiment, in which the truck 4 is connected to both ends of a chain 45 that is stretched over a sprocket 44, and the truck 4 is moved by running the chain 45 by a drive device (not shown). I try to let them do it. Further, in order to improve the discharge of the solidified material, an air cylinder 16 is provided inside the crucible 6 in which a cup 60 made of glass fiber is placed.

Next, the operation of these devices will be explained with reference to the device shown in FIG. In FIG. 8, the cart 4 loaded with the workpiece in the crucible 6 is moved so that the lower furnace body 5 faces the upper furnace body 2, and the air cylinder 11
B to push up the inner frame 52 of the lower furnace body 5 and connect it to the upper furnace body 2, melt the object to be treated, and then leave it for a certain period of time to cool and solidify it. After the melting and solidification is completed, the air cylinder 11 is lowered and the inner frame 52 is separated from the upper furnace body 2 (C). Next, the cart 4 is moved by the air cylinder 13 to place the lower furnace body 5 on the storage container 10. As a result of this movement, the gear 7 engages with the rack 12, the lower furnace body 5 rotates 180 degrees, and the crucible 6 is directed downward D. Next, the discharge valve 8 is pushed by the power cylinder 14 (see FIG. 3), the solidified material 66 in the crucible 6 is dropped into the storage container 10, and the coating agent is sprayed into the crucible 6 from the nozzle 93E. Then, the carriage 4 is moved by the air cylinder 13 to return the lower furnace body 5 to its original position F. By repeating such operations, the material to be processed is melted and solidified, and the solidified product is stored in the storage container, and the crucible 6 is used repeatedly. Note that the apparatus shown in Figure 1 does not have a coating process;
The apparatus shown in FIG. 6 is different in that there is a step of attaching the cup 60 instead of a coating step.
Other points are the same as above.

As explained above, in this invention, the lower furnace body is configured to be movable and rotatable, and a means for taking out the solidified material in the crucible is provided, so that the crucible can be used repeatedly and is easy to operate. Since these steps can be performed continuously, running costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of this invention.
Fig. 2 is a right side view, Fig. 3 is a sectional view taken along the line of Fig. 1, Fig. 4 is a plan view thereof, Fig. 5 is an overall configuration diagram showing another embodiment of this invention, and Fig. 6 is a FIG. 7 is a right side view of another embodiment, and FIGS. 8A to 8F are explanatory views of the operation of the apparatus shown in FIG. 5. 2... Upper furnace body, 3... Rail, 4... Trolley,
5... Lower furnace body, 6... Crucible, 7... Gear, 8
... Discharge valve, 10 ... Storage container, 12 ... Rack, 66 ... Solidified body.

Claims (1)

[Scope of utility model registration request] In a microwave melting furnace having an upper furnace body and a lower furnace body equipped with a crucible for accommodating and melting and solidifying a workpiece, the lower furnace body is
It is mounted so that it can rotate 180° and move up and down.
The cart is configured to be movable laterally with respect to the upper furnace body, and includes means for moving the cart, means for pressing the lower furnace body against the upper furnace body, means for rotating the lower furnace body, and means for rotating the lower furnace body. A microwave melting furnace characterized by comprising means for extruding a solidified material and a storage container for accommodating the extruded solidified material.