JP2009173991A - Magnesium particle production device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnesium particle production device which can easily produce magnesium particles. <P>SOLUTION: The magnesium particle production device includes: a venturi 2 introducing an inert gas fed from a forced blower 1 into a hopper 6 via a gas throttling part 4; and a tundish 8 storing melted magnesium 10 and pressurizing the magnesium 10 by the fed inert gas. The throttling part 4 of the venturi 2 and the tundish 8 are connected by a feed tube 14, and the melted magnesium 10 is fed to the throttling part 4 via the feed tube 14, so that the magnesium is formed into particles. The magnesium particle production device is further provided with: a cooling mechanism 16 cooling the hopper 6 and solidifying the particulate magnesium introduced into the hopper 6; and a recovery vessel 20 connected to the hopper 6 and recovering the particulate solidified magnesium in the hopper. Alternatively, the above device includes: a circulation blower 46 returning the inert gas from the hopper 6 to the forced blower 1; and a vacuum pump 28 connected to the hopper 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a magnesium particle production apparatus for producing magnesium particles.

Conventionally, as disclosed in Patent Document 1, a device has been proposed in which magnesium and water are supplied into a reaction vessel to generate a hydrolysis reaction, thereby obtaining thermal energy and hydrogen gas. In addition, in this apparatus, it is proposed that when magnesium is regenerated by laser reduction of magnesium oxide or hydroxide, the magnesium is regenerated by using a solar light excitation laser as the laser to be reduced.
JP 2007-145686 A

  In such a conventional product, when a hydrolysis reaction between magnesium and water is generated in a reaction vessel, it is preferable to use magnesium or a molded body obtained by molding magnesium particles. However, when magnesium is regenerated by laser reduction, it is regenerated as a magnesium ingot, so that the ingot remains unsuitable for use in a hydrolysis reaction.

  The subject of this invention is providing the magnesium particle manufacturing apparatus which can manufacture the particle | grains of magnesium easily.

In order to achieve this problem, the present invention has taken the following measures in order to solve the problem. That is,
A venturi that guides the inert gas supplied from the pushing blower to the hopper through the throttle, and a tundish that stores the molten magnesium and pressurizes the magnesium with the supplied inert gas. The squeezing part and the tundish are connected by a supply pipe, the molten magnesium is supplied to the squeezing part through the supply pipe, and the magnesium is granulated, and the hopper is cooled and the hopper is cooled. A magnesium particle producing apparatus comprising: a cooling mechanism for solidifying the particulate magnesium led to the inside; and a recovery container connected to the hopper and for collecting the particulate solidified magnesium in the hopper. That is it. Moreover, it is good also as a structure which provided the circulation blower which returns the inert gas from the said hopper to the said pushing blower. Furthermore, it is good also as a structure provided with the vacuum pump connected to the said hopper.

  In the magnesium particle production apparatus of the present invention, magnesium melted from the tundish is supplied to the throttle part of the venturi through the supply pipe, the magnesium is granulated, solidified by a hopper, and collected in a collection container. There exists an effect that particle | grains can be manufactured easily. Moreover, the inert gas can be circulated and used by returning the inert gas from the hopper to the pushing blower by the circulation blower. Furthermore, by connecting a vacuum pump to the hopper, air can be excluded and the inert gas can be easily filled.

The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
As shown in FIG. 1, reference numeral 1 denotes a pusher blower. The pusher blower 1 supplies an inert gas such as an argon gas from a gas tank (not shown) to the venturi 2. The venturi 2 includes a throttle portion 4 having a narrowed flow path, and the venturi 2 is connected to a hopper 6 so that the supplied inert gas is guided to the hopper 6 through the throttle portion 4.

  8 is a tundish, and the tundish 8 stores the molten magnesium 10 and is sealed so that the molten magnesium 10 in the tundish 8 can be pressurized by an inert gas such as argon gas supplied. Configured. Further, the coil 12 may be disposed on the outer periphery of the tundish 8 and the magnesium 10 may be heated by high frequency induction heating to prevent the magnesium 10 from solidifying.

  One end of a supply pipe 14 is connected to the throttle section 4 of the venturi 2, and the end of the supply pipe 14 is opened to the throttle section 4. The other end of the supply pipe 14 is connected to the tundish 8 and is opened near the bottom in the tundish 8.

  A cooling mechanism 16 for cooling the inside of the hopper 6 by circulating cooling water around the outer periphery of the hopper 6 is provided. Further, one end of a recovery pipe 18 is connected to the bottom of the hopper 6, and the other end of the recovery pipe 18 is connected to a sealed recovery container 20. A shutoff valve 22 is interposed in the middle of the recovery pipe 18. The collection container 20 is disposed in the glove box 24, and an exhaust blower 26 is connected to the glove box 24 so that the inside of the glove box 24 can be exhausted.

  A vacuum pump 28 is connected to the hopper 6, and an exhaust pipe 32 that guides an inert gas to the cyclone 30 is connected to the bottom of the hopper 6. The cyclone 30 separates the magnesium 10 fine particles contained in the inert gas exhausted from the hopper 6, and collects the separated fine particles in a sealed collection container 34. The collection container 34 is disposed in the glove box 36, and an exhaust blower 38 is connected to the glove box 36 so that the inside of the glove box 36 can be exhausted.

  The inert gas exhausted from the cyclone 30 is guided to the bag filter 39, and the bag filter 39 separates finer particles contained in the inert gas, and the separated particles are collected in a sealed collection container 40. To do. The collection container 40 is disposed in the glove box 42, and an exhaust blower 44 is connected to the glove box 42 so that the inside of the glove box 42 can be exhausted.

  A circulation blower 46 is connected to the bag filter 39 so as to supply an inert gas from the bag filter 39 to the gas cooler 48. The gas cooler 48 cools the inert gas with the supplied cooling water. The gas cooler 48 is connected to the pushing blower 1, and the cooled inert gas is returned to the pushing blower 1 so that the inert gas is circulated and used. Note that the gas passing through the gas cooler 48 can be discharged by switching a valve (not shown).

Next, the operation of the above-described magnesium particle production apparatus of the present embodiment will be described.
First, the vacuum pump 28 is operated to discharge the air in the system such as the venturi 2, the tundish 8, the hopper 6, the cyclone 30, the bag filter 39, the collection containers 20, 34, 40, and the like. The other devices are shut off by a valve (not shown) so that the airtightness can be maintained. The target pressure may be 0.133 Pa, for example. When the target pressure is reached, the valve (not shown) is closed to maintain airtightness, and the operation of the vacuum pump 28 is stopped (decompression step).

  Next, an inert gas such as argon gas is introduced into the decompressed venturi 2, tundish 8, hopper 6, cyclone 30, bag filter 39, each recovery container 20, 34, 40, etc. until the pressure becomes equal to the atmospheric pressure ( First intake step).

  Subsequently, after the atmospheric pressure is reached, the introduction of the inert gas is continued. When the atmospheric pressure reaches 1.1 times the atmospheric pressure, the shut-off valve (not shown) is opened to inactivate other devices. Introduce gas. At that time, a valve (not shown) is opened, and the circulation blower 46 is operated at a low speed to expel the air in the system little by little. An oxygen concentration meter and pressure gauge (not shown) are used to measure the oxygen concentration and pressure in the system, and when the set values are reached, the valve is closed and the inert gas is circulated in the system (secondary intake process).

  The circulation blower 46 and the pushing blower 1 are operated under the operating conditions. Although the inert gas slightly leaks out of the system, the introduction of the inert gas is controlled so that the oxygen concentration and the internal pressure become set values. Further, the flow rate of the inert gas is controlled by controlling the pusher blower 1 so that the static pressure of the throttle unit 4 becomes a set value. Furthermore, the supply of cooling water is started, and the exhaust blowers 26, 38, 44 are also operated (a melt receiving preparation step).

  Next, molten magnesium 10 is poured into the tundish 8. The molten magnesium 10 may be melted in a melting furnace (not shown) and supplied by a metal pump. When the molten magnesium 10 is injected into the tundish 8 above a specified value, an inert gas is introduced into the tundish 8 so as to be at a set pressure.

  Thereby, the molten magnesium 10 is ejected to the throttle part 4 through the supply pipe 14, and the molten magnesium 10 is formed into particles by the high-speed inert gas and the surface tension of the molten magnesium 10 (so-called gas atomization method). . Since the inert gas is continuously supplied, the pressure in the system gradually increases. When the pressure exceeds the set pressure, the air is automatically exhausted to keep the pressure inside the system constant.

  The particulate magnesium 10 is introduced into the hopper 6 through the venturi 2, cooled in the hopper 6 with an inert gas and cooling water, deprived of the latent heat of fusion, and solidified to form solid magnesium metal particles. (Atomization process).

  Magnesium particles are recovered from the hopper 6 through the recovery pipe 18 into the recovery container 20. Some small magnesium particles are discharged to the cyclone 30 through the exhaust pipe 32 together with an inert gas.

  In the cyclone 30, the magnesium particles contained in the inert gas are separated and collected in the collection container 34. Further, the inert gas is further introduced into the bag filter 39, and the bag filter 39 separates and captures finer magnesium particles and collects them in the collection container 40. Then, the inert gas is cooled by the gas cooler 48, returned to the pushing blower 1, and again supplied to the venturi 2 for circulation.

  Each collection container 20, 34, 40 contains magnesium particles and an inert gas, and the inside of each collection container 20, 34, 40 is replaced with air in the glove box 24, 36, 42. The lids of the collection containers 20, 34, and 40 are opened to collect the magnesium particles. The inside of the glove box 24, 36, 42 is maintained at a pressure (for example, −50 Pa) slightly lower than the atmospheric pressure by the exhaust blowers 26, 38, 44 so that the worker is not exposed to the inert gas (recovery process). .

  The present invention is not limited to such embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.

It is a schematic block diagram of the magnesium particle manufacturing apparatus as one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Push-in blower 2 ... Venturi 4 ... Constriction part 6 ... Hopper 8 ... Tundish 10 ... Magnesium 12 ... Coil 14 ... Supply pipe 16 ... Cooling mechanism 18 ... Collection pipes 20, 34, 40 ... Collection containers 26, 38, 44 ... Exhaust blower 28 ... Vacuum pump 30 ... Cyclone 39 ... Bag filter 46 ... Circulation blower

Claims (3)

A venturi that guides the inert gas supplied from the pushing blower to the hopper through the throttle, and a tundish that stores the molten magnesium and pressurizes the magnesium with the supplied inert gas,
The throttle part of the venturi and the tundish are connected by a supply pipe, the molten magnesium is supplied to the throttle part via the supply pipe, and the magnesium is granulated.
A cooling mechanism that cools the hopper and solidifies the particulate magnesium guided to the hopper; and a recovery container that is connected to the hopper and collects the solidified magnesium in the hopper. A magnesium particle manufacturing apparatus characterized by the above. The apparatus for producing magnesium particles according to claim 1, further comprising a circulation blower for returning an inert gas from the hopper to the pushing blower. The magnesium particle manufacturing apparatus according to claim 1, further comprising a vacuum pump connected to the hopper.

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