JPS60165331A - Metal vapor recovery apparatus - Google Patents

Abstract

PURPOSE:To easily perform the tapping work of a molten metal to a casting chamber with high efficiency, in recovering a molten metal in a state cast in a casting mold by once solidifying objective metal vapor in a solidification chamber before melting under heating, by communicating a metal melting chamber and the casting chamber by a conduit having an opening and closing valve. CONSTITUTION:The metal evaporated in a metal evaporation apparatus 20 is introduced into the hermetically closed space 3 of a vacuum solidification container 1 through a conduit 19. Herein, because metal vapor is solidified and adhered to a side wall 9 upon cooling, a heater 35 is operated to heat the solidified one to accumulate the same to the bottom of a container 1 as a molten metal 27. Next, a valve 30 is opened while a vacuum pump 32 is operated to evacuate a casting chamber 24 so as to make the pressure therein same to the vacuum pressure in the vacuum hermetically closed space 3 and, thereafter, the valve 16 of a conduit 17 is opened to cast the molten metal 27 in the casting mold within the casting chamber 24. At this time, only by opening the valve 37 provided to the conduit 38 for communicating the hermetically closed space 3 and the casting chamber 24, pressures of both chambers are made uniform and the gushing out of the molten metal 27 by pressure difference is prevented and the molten metal 27 is safely and surely cast in the casting mold 28 at high yield.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a metal vapor recovery device.

BACKGROUND OF THE INVENTION One known method for recovering metal vapor is to cool and condense the metal vapor and recover it as liquid metal or solid metal. Conventional metal vapor recovery equipment used to carry out such metal vapor recovery methods generally includes a condensation vessel that defines a sealed space inside and has a metal vapor introduction port and a molten metal extraction boat, and a condensation vessel that has a sealed space inside. a recovery container defining a space and having a molten metal introduction boat; a passage means for communicating and connecting the molten metal removal boat and the molten metal introduction boat 1- to guide molten metal from the condensation container to the recovery container; a first pressure reducing means for reducing pressure, a second reducing means for reducing the pressure inside the collection container, an on-off valve for selectively controlling communication between the passage means, and the condensing container. It has a first heating means for heating the inside of the passage means to a predetermined temperature, and a second heating means for heating the inside of the passage means to a predetermined temperature.

Recovery of metal vapor using such conventional metal vapor recovery equipment involves introducing metal vapor into a condensation container while maintaining the inside of the recovery container at a predetermined reduced pressure state by a first decompression means, and condensing the metal vapor by air cooling. The metal vapor is liquefied and further solidified to obtain a predetermined amount of solid metal in the condensing vessel. At this stage, the solid metal is heated and melted by the first heating means, and the on-off valve is closed. This is accomplished by discharging the molten metal from the condensing vessel to the recovery vessel via passage means, and collecting the molten metal into an ingot case disposed within the recovery vessel.

In metal vapor recovery operations using such conventional metal vapor recovery equipment, in the step of tapping molten metal from the condensing vessel to the recovery vessel, if there is a relatively large pressure difference between the two vessels. In some cases, the molten metal may not be discharged into the collection container, or the molten metal may spout into the collection container, making it impossible to perform a good tapping operation. Also, the second pressure reducing means is operated appropriately to adjust the pressure so that the pressure in the tIC condensing container and the pressure in the recovery container are substantially equal. Such pressure adjustment work is complicated and deteriorates the efficiency of metal vapor recovery work.In addition, if the pressure or temperature inside the condensing vessel changes during the tapping process, the pressure inside the condensing vessel and the recovery A relatively large pressure difference between the pressure inside the container and the pressure inside the container may occur, making it impossible to perform the tapping operation properly.

Purpose of the Invention The present invention has been made in view of the problems mentioned in (1) in the conventional metal vapor recovery equipment, and has been improved so that metal vapor recovery work can be carried out satisfactorily without such problems occurring. The purpose is to provide metal vapor recovery equipment.

Structure of the Invention According to the present invention, the present invention provides a first container which defines a closed space inside and has a metal vapor introduction boat 1~ and a molten metal extraction boat, and defines a closed space inside. A second container having a molten metal payload boat] is connected in communication with the molten metal take-out boat and the molten metal introduction boat 1-, and the molten metal is introduced from the first container to the second container. a first passage means; a first on-off valve that selectively controls communication of the first passage means; and a second passage means that communicates and connects the first container and the second container. This is achieved by a metal vapor recovery device having a second on-off valve that selectively controls communication of the second passage means, and a heating means that selectively heats the inside of the first container.

Effects and Effects of the Invention According to this configuration, prior to the step of tapping the molten metal, the second on-off valve is opened and the first container and the second container are connected to each other by the second passage means. The pressure inside the two containers can be easily and quickly released equally through a simple procedure, so that the molten metal tapping operation can be carried out in a good and efficient manner.

Embodiment FIG. 1 is a vertical cross-sectional view of one embodiment of the metal vapor recovery apparatus according to the present invention, and FIG. 2 is a side view of the embodiment shown in FIG. 1 as viewed from the right side of FIG. 1. It is.

In these figures, reference numeral 1 indicates a cylindrical container body 2 with a bottom, a lid member 4 that closes the upper end of the container body, and defines a vertically long sealed space 3 inside the container body. A condensation vessel consisting of: An O-ring seal 7 is interposed between the flange 5 provided on the upper end of the container body (k2) and the flange 6 provided on the lid member 4 to seal the space between them. A narrow cylindrical space 8 is defined between the upper end of the lid member 4 and the lid member 4.

A suction boat 10 opening into the space 8 is provided at the upper end of the cylindrical side wall 9 of the container body 2, and one end of a conduit 11 is connected to the suction boat 1-.

The other end of the conduit 11 is connected to a vacuum pump 12 as pressure reducing means, and an on-off valve 13 is provided in the middle of the conduit 11 to selectively control communication between the space 8 and the vacuum pump 12. . Further, a molten metal removal boat 15 is provided on the side wall 9 of the container body 2 at a position close to the bottom wall 14, and one end of a conduit 17 having an on-off valve 16 in the middle communicates with the molten metal removal boat 15. It is connected. Further, on the side wall 9 of the container body 2, there are a suction boat 10 and a molten metal extraction ball l~.
A metal vapor introduction boat 18 for introducing metal vapor into the closed space 3 is provided at a height between 15 and 15, and the metal vapor introduction boat is connected to the metal vapor generator 20 by a conduit 19. I'm here.

In the metal vapor recovery device 20, a liquid metal or a solid metal charged in a housing 21 defining a sealed space therein is heated by a heater 22 disposed around the housing 21, whereby metal vapor is recovered. Il knee letting off steam! "I'm starting to feel like I'm here."

In addition to the drawer 17, V- defines a molten metal introduction bow 1-15' in the casting chamber 24 of the recovery container 26, which is divided into a casting chamber 24 and a take-out chamber 25 by a gate 23. - (As a result, the molten metal 27 formed by condensation in the condensation vessel 1 passes through the conduit 17 to the casting chamber 24.
It is designed to be guided into the inboxes 1 to 28 arranged inside. The recovery container 26 is provided with boats I to 29 that communicate with the casting chamber 2/1, and the boat is connected to a vacuum pump 32 by a conduit 31 that has an on-off valve 30 on the right, and thereby the casting chamber 2/1. The pressure inside 24 is selectively reduced to a predetermined pressure.

Although not shown in the figure, Goo I-23 has an internal partition plate that can reciprocate in a direction perpendicular to the plane of the paper in Figure 2.
As a result, communication between the casting chamber 24 and the unloading chamber 25 is selectively and airtightly blocked. Collection container 2
An opening/closing gate 33 is provided on the end face of the extraction chamber 25 of 6, and the gate 23 is opened when a predetermined amount of molten metal or its solidified material is obtained in the inbox case 28.
A driving means not shown in the figure moves the ingot 1-fooce 28 from the casting chamber 24 to the unloading chamber 25, then closes the ingot 1-23, and further opens the opening/closing door 33. The ingot case 28 can be taken out from the recovery container 26 without significantly damaging the reduced pressure state inside.

The conduit 17 has a downward slope section 17a when viewed in the flow direction of the molten metal 27, and a downward slope section 17b located downstream of the downward slope section.
7 is blocked by molten metal 811 remaining in the middle. In addition, the conduit 17 is made of a material with relatively good thermal conductivity, so that the molten metal 11 that remains in the middle of the conduit 17 solidifies relatively quickly, and this causes the closed space 3 and the casting chamber 2 Communication between *tf
It solidifies inside the tube 17 and is sealed airtightly with the metal. Further, a heater 34 is provided around the conduit 17 to selectively heat the inside of the conduit to a predetermined temperature, thereby preventing condensation from remaining in the middle of the conduit 17.
It is designed to selectively heat and melt solidified metal.

A heater 35 is provided around the side wall 9 of the condensing vessel 1 to selectively heat the inside of the condensing vessel to a predetermined temperature. Also, on the side wall 9 of the condensing vessel 1, there is a height position between the suction balls 1 to 10 and the molten metal removal boat 15 (inside the condensing vessel).
A boat 36 is provided, and one end of a conduit 38 is connected in the middle of the boat to a pressure regulating valve and an on-off valve 37.The other end of the conduit 38 is connected to a casting chamber. 24
By opening and closing the on-off valve 37, the closed space 3 and the casting chamber 24 are opened inward.
! It is now possible to communicate with each other.

When recovering metal vapor using the metal vapor recovery apparatus configured as described above, the vacuum pump 12 is operated with the on-off valve 16 set to the q1 valve and the on-off valve 13 opened. The pressure saw in the sealed space 3 is reduced to a predetermined pressure, thereby continuously introducing metal vapor from the metal vapor generator 20 into the sealed space 3 via the conduit 19, and the metal introduced into the sealed space 3. The steam is condensed by air cooling. In this case, the metal vapor condenses and liquefies on the inner peripheral surface of the side wall 9 and solidifies relatively quickly. A predetermined amount of solid metal is placed in the condensing vessel 1. In step 1, the heater 35 is energized to heat the inside of the condensing vessel 1, thereby melting the solid metal in the condensing vessel. At the same time, the pressure inside the casting chamber 24 is reduced by opening the on-off valve 30 and operating the vacuum pump 32, and the pressure inside the closed space 3 and the pressure in the casting chamber 24 is reduced by opening the on-off valve 37. After the equalization, the on-off valve 16 is opened and the molten metal 27 is discharged from the condensation vessel 1 through the conduit 17 into the ingot case 2B in the casting chamber 24. After that, fffl closes the valve 1
6. Close valves 30 and 37, listen to the gate 23, move the ingot case 28 into the extraction chamber 35, and open the gate 23.
After closing, open the opening/closing door 23 and open the C ingot wooce 28.
At this stage, the molten metal that remains in the middle of the conduit 17 and covers it is solidified by air cooling, and the solidified metal creates an airtight communication between the closed space 3 and the casting chamber 24. It is continuous. In the next molten metal depletion step, the heater 34 is energized and the C conduit 1
The solidified metal within 7 is melted.

Thus, according to the invention, the collection vessel 26 is separated from the condensation vessel 1.
Prior to the process of draining and draining the molten metal 27, the pressure in the condensing vessel 1 and the pressure in the casting chamber 24 can be easily and quickly equalized by simply opening the on-off valve 37 (). Therefore, it is understood that the molten metal tapping operation can be carried out more efficiently and efficiently than in the case of conventional metal vapor recovery equipment.

Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited to such embodiments, and various embodiments are possible within the scope of the present invention. It will be clear to those skilled in the art that, for example, IJAII
F''17 may extend substantially horizontally or downwardly to the instep from the molten metal removal boat 1-15 to the molten metal FS introduction boat 15'.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a second embodiment of a metal vapor generator according to the present invention, and FIG. 2 is a side view of the embodiment shown in FIG. 1, viewed from the right side of FIG. 1. . '1... Condensation container, 2... Container body, 3... Closed space. 4... Lid member, 5.6... Flange, 7... 0 ring seal, 8... Space, 9... Side wall, 10...
suction boat. 11... Conduit, 12... Vacuum pump, 13... Open/close valve. 14... Bottom wall, 15... Molten metal extraction port h, '1
5'... Molten metal extraction bow h, 16... Opening/closing valve, 1
7... Conduit, 17a... Downhill part, 17b.
...] Nili slope part, 18...Metal steam Hirojin port
-, 19... Conduit. 20... Metal steam generator, 21... Housing,
22... Heater, 23... Gate, 24... Casting chamber, 25... Removal chamber, 26... Recovery container, 27...
...molten metal. 28... Ingot Koos, 29... Boat, 30
... Opening/closing valve, 31... Conduit, 32... Vacuum pump, 33... Opening/closing door, 34. 35... Heater, 36...
...Boat, 37...InI 11 jf, 3 B
...)Himanu Patent Applicant 1 Heyota Jidosha Co., Ltd. Representative Patent Attorney Masatake Akashi Figure 1

Claims (1)

[Claims] a first container defining a sealed space inside and having a metal vapor introduction boat and a molten metal extraction boat; a second container defining a sealed space inside and having a molten metal introduction boat; and the molten metal extraction vessel. a first passage means for communicating and connecting a boat and the molten metal introduction boat and guiding molten metal from the first container to the second container; and a second passage means for selectively controlling communication between the first passage means. a second on-off valve, a second passage means for communicating and connecting the first container and the second container, and a second on-off valve for selectively controlling communication of the second passage means; Said 10? A metal vapor recovery device having heating means for selectively heating the inside of a container.