KR101364479B1 - Thermo-Reduction apparatus for manufacturing magnesium and method for manufacturing magnesium using the same - Google Patents

Abstract

The present invention relates to a heat reduction device for producing magnesium and a method for producing magnesium using the same, as a heat reduction device for manufacturing magnesium used in the magnesium manufacturing process, a heat reduction furnace for heating the molded briquettes, and the molded briquettes are loaded into a heat reduction furnace And a plurality of condensers for alternately condensing the magnesium vapor generated in the thermal reduction reaction tube and the thermal reduction reaction tube heated by the thermal reduction reaction tube. Therefore, the present invention connects a plurality of condensers to one heat reduction reaction tube and alternately distributes the condensed magnesium to perform condensation work alternately, thereby maximizing the recovery rate of the magnesium crown deposited on the condenser while minimizing the charge discharge time. It provides the effect of improving the production efficiency of magnesium.

Description

Thermo-reduction apparatus for manufacturing magnesium and method for manufacturing magnesium using the same}

The present invention relates to a heat reduction device for producing magnesium and a method for producing magnesium using the same, and more particularly, after firing dolomite ore as a raw material, using a silicon metal, ferrosilicon, and ferrosilicon aluminum as a reducing agent, It relates to a heat reduction device for producing magnesium for producing magnesium metal in a solid or molten phase by reducing, and a method for producing magnesium using the same.

Magnesium is an element that is present in the earth's crust as well as in seawater.In 1808, British chemist H. Davie reduced magnesia (MgO) to metal potassium and extracted a small amount of metal for the first time. B. Reducing agent for titanium production and used as an alloy source of aluminum material. However, since 2000, it has light weight, thermal conductivity and specific strength with 2/3 of aluminum of aluminum and 1/4 of iron. According to various material characteristics such as shielding properties, the utilization is gradually being expanded to transportation equipment such as automobiles or IT industry, and production volume is also increasing.

In general, the method of making magnesium metal can be divided into electrolytic and silicon thermal reduction. Magnesite, dolomite, serpentine and cannalite have been mainly used as raw materials for manufacturing magnesium by electrolysis, but recently electrolysis has used canalite obtained from salt lakes or mines in Russia, the United States and Israel. Although it is in operation, the production of magnesium by electrolytic method has been accomplished through large facilities by using magnesite or serpentine as raw material in addition to canalite in the terrain such as Norwegian and Canada where hydroelectric power was developed before 2005. Most of the facilities are currently in operation, and the planned new investment projects were canceled due to the lack of competitiveness compared to the production of magnesium ingots under China's thermal reduction method.

The heat reduction method was developed in Canada using dolomite as a raw material. However, it was a rapidly developed magnesium smelting method in China in the 2000s. Until the Beijing Olympics, cheap coal was basically used directly as a heat source for dolomite firing and heat reduction furnaces. In the case of heat reduction facilities, a large amount of dust is generated and environmental pollutants such as SOx, NOx, and CO are emitted due to the use of coal. Therefore, magnesium smelting facilities have been recognized as energy-consuming environment facilities.

Magnesium manufacturing process through external heating of horizontal retort of existing Pigeon heat reduction reactor requires intermittent operation requiring about 10 hours reduction time and 2-3 hours discharge / charge time in vacuum. While there is an advantage that magnesium can be manufactured even at a small scale as a facility, the production of a large amount of magnesium has a limitation in productivity, and the operation is performed by manual labor by a large number of personnel under poor environmental conditions.

In the existing Pigeon heat reduction method, the shape of the heat-reduction reaction tube is basically closed, and the raw material for magnesium production is charged by manual operation, and a condenser with a cooling jacket is installed at the inlet of the reaction tube for external heating. Thermal reduction is carried out to produce a magnesium crown. In general, briquettes are charged with a mixture of calcined dolomite and 75% silicon iron alloy in a heat reduction reaction tube having a diameter of about 300 to 350 mm. About 100-150kg of briquette briquettes are charged, and the magnesium crown is about 15-25kg. At this time, the charging of raw materials and the discharge of products have operational limitations depending on manpower.

In addition, since the heat reduction reaction tube is also mounted horizontally in the reduction furnace, there is a limit in the installation of the multi-stage, and is limited to 1 to 2 stages, so as to limit the installation of the heat reduction reaction tube per unit volume. Productivity is also limited.

In addition, in the conventional heat reduction process, anthracite coal has been mainly used as an energy source of a kiln or a heat reduction furnace. Therefore, a large number of SOx, NOx, CO, etc. are generated due to the generation of dust and the combustion of anthracite. Emission of environmental pollutants is inevitable. Therefore, this too needs to be improved.

In order to improve the intermittent operation in the form of horizontal heat reduction reaction tube in Pigeon heat reduction method, a lot of technical developments have been carried out to manufacture magnesium continuously. The Magnetherm method, which melts at -1600 ° C and reduces magnesium with silicon metal in the molten state to produce magnesium, has been developed and commercialized in France earlier, but it lacks economical efficiency due to the use of electricity and the product quality compared to the existing Pigeon thermal reduction method. Due to the technical limitations of the award, it was no longer developed and was shut down in the early 2000s.

Therefore, in the case of the silicon thermal reduction method of manufacturing molten magnesium, it is usually applied to molten silicon at high temperature molten state by dissolving charged dolomite, ferrosilicon (75%), and fluorite and some alumina or aluminum which are charged with electric energy. Magnesium process, which recovers the precipitated magnesium metal at low pressure under reduced pressure and recovers it to liquid phase through a high-temperature duct, or the Mintek method of reducing and recovering magnesium by dissolving it under higher temperature and atmospheric pressure. .

However, compared to the silicon heat reduction method that uses coal gas as energy, it is disadvantageous in terms of cost. In the case of magnesiumation method, France's manufacturing plant, which was the only commercialization process before 2000, was closed, and Mintech law of South Africa was pilot. He is staying at the technology development of the Pilot Plant stage.

In addition, the Brazilian Lima (RIMA) method, unlike the existing Pigeon method, which heat-reduces the outside of the heat-reduction reaction tube and heat-reduces it, heat-reduces it by heating it at a high temperature by installing an electric heater in a vertical array inside a large vertical heat-reduction furnace. Alternatively, magnesium is produced by installing a large condenser on the upper side to recover magnesium, but the metal recovery efficiency is low around 70%.

As described above, the presently applied or commercially available molten magnesium smelting process has various problems such as lack of economics due to the use of electrical energy.

The present invention has been made to solve the conventional problems as described above, because the condensation operation is performed alternately to maximize the recovery rate of magnesium crown deposited on the condenser while minimizing the charge discharge time to improve the production efficiency of magnesium In addition, the vacuum heat reduction reaction can be easily performed, facilitate the introduction of magnesium vapor into the condenser, and at the same time facilitate condensation by the flow of magnesium vapor in the condenser, and can alternately supply magnesium vapor to each condenser, It can accelerate the dissolution of magnesium, prevent the fixation of magnesium solution, efficiently heat the molten metal storage tank, improve the recovery of magnesium, and continuously discharge the reduced residue under closed conditions, thereby automating the process. And heat exchange for manufacturing magnesium, which enables high productivity operation It is an object of the present invention to provide an original device and a method for producing magnesium using the same.

The present invention for achieving the above object, as a heat reduction device for producing magnesium used in the magnesium manufacturing process, a heat reduction furnace for heating the molded briquettes mixed with the molded dolomite, ferrosilicon and fluorspar powder; A heat reduction reaction tube installed inside the heat reduction furnace and charged with the molded briquettes and heated by the heat reduction reactor; And a plurality of condensers installed on the outside of the heat reduction reactor, respectively, connected to the heat reduction reaction tubes to alternately condense magnesium vapor generated in the heat reduction reaction tubes.

In addition, the present invention further includes a vacuum pump connected to each of the plurality of condensers to vacuum the inside of the condenser.

A connecting pipe is connected between the heat reduction reaction tube and the condenser of the present invention, and the connecting pipe is tangentially connected to an outer circumferential surface of the condenser. The connecting pipe of the present invention is provided with a shutoff valve so as to alternately supply magnesium vapor to each condenser.

A cylindrical combustion chamber is installed at the upper end of the condenser of the present invention, and a plurality of magnetic heat exchanger-type burners are installed around the inner circumferential surface of the combustion chamber to heat-dissolve the magnesium crown attached to the outer circumferential surface of the combustion chamber.

At the upper end of the condenser of the present invention, a supply port for injecting magnesium chloride flux for refining magnesium is provided to promote dissolution of magnesium. The inner lower end of the condenser of the present invention is formed with a molten metal storage tank for storing a magnesium solution condensed in the inner upper end of the condenser.

The lower part of the condenser of the present invention is provided with a magnesium melting furnace for heating the molten metal reservoir to maintain a constant temperature to prevent the fixing of the magnesium solution. Inside the magnesium melting furnace of the present invention, a plurality of swing-type burners are provided in the tangential direction of the outer circumferential surface of the molten metal storage tank to heat the molten metal storage tank.

In addition, the present invention provides a method for producing magnesium using the heat reduction apparatus for producing magnesium according to claim 1, comprising the steps of: heating magnesium oxide briquettes mixed with calcined dolomite, ferrosilicon and fluorite powder to produce magnesium vapor; Distributing the produced magnesium vapor to each condenser and supplying it alternately; Condensing the supplied magnesium vapor in a condenser; And dissolving and discharging the condensed magnesium.

In addition, the present invention is characterized in that it further comprises the step of refining by discharging the dissolved magnesium in the molten metal storage tank installed in the lower part of the condenser to maintain the solution state and discharged to the refining furnace at the lower end.

As described above, the present invention connects a plurality of condenser to one heat reduction reaction tube and alternately distributes condensation of magnesium to condense magnesium, thereby performing condensation work alternately, thereby minimizing charge-discharge time and the magnesium crown deposited on the condenser. It provides the effect of maximizing the recovery rate of and improving the production efficiency of magnesium.

By connecting a vacuum pump to the condenser to make the heat reduction reaction tube and the condenser in a vacuum atmosphere, vacuum heat reduction reaction is made easily.

By connecting a connection pipe between the heat reduction reaction tube and the condenser and connecting in the tangential direction of the condenser, it facilitates the inflow of magnesium vapor into the condenser and facilitates condensation by the flow of magnesium vapor in the condenser.

Shut-off valves are installed in the connection pipes between the heat reduction reactor and the condenser to alternately supply magnesium vapor to each condenser.

A burner may be installed around the combustion chamber of the condenser to facilitate dissolution of magnesium attached to the outer surface of the combustion chamber, and a supply port for injecting flux may be installed at the upper end of the condenser to promote dissolution of magnesium.

The magnesium melting furnace is installed around the molten metal storage tank installed in the lower part of the condenser to heat the molten metal storage tank to maintain a constant temperature to prevent the magnesium solution from sticking.

The inside of the magnesium melting furnace is provided with a plurality of swing-type burners in the tangential direction of the outer circumferential surface of the molten metal reservoir provides an effect that can efficiently heat the molten metal reservoir.

In addition, it is possible to prevent deterioration of the quality contaminated with oxide in the process of processing magnesium in the solid phase, improve the recovery rate of magnesium without loss due to exposure to the air in the middle process, and to reduce the slag as a residue of residue under the sealed condition. Emissions can be carried out continuously, which allows for process automation and high productivity operation.

1 is a block diagram showing a magnesium manufacturing process according to an embodiment of the present invention.
Figure 2 is a block diagram showing a heat reduction device for producing magnesium according to an embodiment of the present invention.
Figure 3 is a block diagram showing a condenser of the heat reduction device for producing magnesium according to an embodiment of the present invention.
Figure 4 is a top view showing a condenser of the heat reduction device for producing magnesium according to an embodiment of the present invention.
Figure 5 is a bottom view showing the condenser of the heat reduction device for producing magnesium according to an embodiment of the present invention.
Figure 6 and Figure 7 is a state diagram showing the opening and closing state of the shut-off valve of the condenser of the heat reduction apparatus for producing magnesium according to an embodiment of the present invention.
8 is a flowchart illustrating a method of manufacturing magnesium using a heat reduction device for manufacturing magnesium according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a magnesium manufacturing process according to an embodiment of the present invention, Figure 2 is a block diagram showing a heat reduction device for producing magnesium according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention 4 is a block diagram showing a condenser of a magnesium thermal reduction apparatus according to an embodiment, Figure 4 is a top view showing a condenser of a magnesium thermal reduction apparatus according to an embodiment of the present invention, Figure 5 is an embodiment of the present invention Figure 6 is a bottom view showing the condenser of the heat reduction device for producing magnesium according to the present invention, Figure 6 and Figure 7 is a state diagram showing the opening and closing state of the shut-off valve of the condenser of the heat reduction device for producing magnesium according to an embodiment of the present invention.

1 and 2, in the manufacturing process of magnesium, dolomite mined in a mine is pulverized to a certain particle size, and then charged into a calcination furnace 100 to be calcined to produce calcined dolomite. Such kilns are usually made in rotary kilns or shaft kilns, but can also be made in kilns.

Subsequently, ferrosilicon containing about 70% or more of silicon (Si) used as a reducing agent (typically 72 to 85%) and fluorite are added, pulverized and mixed, and then molded in the molding machine 300 to form a molded article. To form.

 The molded briquettes are charged into the heat reduction reaction tube 410 as a charging material of the heat reduction reaction tube 410 installed in the heat reduction reactor 400 in which the briquetting regenerative burner 430 is mounted, and the heat reduction reaction tube ( While maintaining the outside of the 410 at a high temperature, the heat reduction reaction tube 410 is made into a vacuum atmosphere by using the vacuum pump 600, and the inside of the heat reduction reaction tube 410 is made of magnesium vapor by the following equation. Reducing slag is made.

MgOCaO + Si (Fe) → 2Mg + Ca ₂ SiO ₄ + Fe

CaF ₂ is used here as a catalyst.

As shown in FIG. 2, the heat reduction apparatus for manufacturing magnesium according to the present embodiment includes a heat reduction furnace 400, a heat reduction reaction tube 410, and a condenser 500, and a heat reduction apparatus for manufacturing magnesium used in a magnesium manufacturing process. to be.

The heat reduction furnace 400 is a heat source for heating the molded briquettes in which the calcined dolomite, ferrosilicon, and fluorspar powder are mixed and formed, and a plurality of heat reduction furnaces that burn by using coal gas or LNG gas as a heat source in the inner circumference thereof. Burner 430 is spaced apart.

As illustrated in FIG. 2, the heat reduction reaction tube 410 is installed in the heat reduction furnace 400, and is filled with molded briquettes and heated by the heat reduction reactor 400 to perform vacuum heat reduction reaction. As a top retort, an upper lid 411 is provided at an upper portion, a lower lid 412 is provided at a lower portion thereof, and an inner cylinder 413 is provided therein.

2 and 3, the condenser 500 is installed in the outside of the heat reduction reactor 400, but a plurality of separate installation so as to be connected to the heat reduction reaction tube 410, respectively, the heat reduction reaction tube 410 Alternately condensate the magnesium vapor produced in

A connecting pipe 415 is connected between the heat reduction reaction tube 410 and each condenser 500, and the connecting pipe 415 is tangentially connected to the outer circumferential surface of the condenser 500 as shown in FIG. 4. .

In addition, each connection pipe 415 is provided with a shutoff valve 450 to alternately distribute and supply magnesium vapor to each condenser 500, inert such as argon to the magnesium vapor supplied to the condenser 500 An inert gas inlet 417 for supplying gas is provided.

A cylindrical combustion chamber 510 is installed at the upper end of the condenser 500, and a plurality of magnetic heat exchange types are formed around the inner circumferential surface of the combustion chamber 510 to dissolve the magnesium crown 511 attached to the outer circumferential surface of the combustion chamber 510. The burner 530 is provided.

On the upper end side of the condenser 500, a dissolution flux supply port 540 for injecting magnesium chloride flux for refining magnesium is installed to promote dissolution of the magnesium crown 511 attached to the outer circumferential surface of the combustion chamber 510.

A molten metal storage tank 555 is formed at an inner lower end of the condenser 500 to store a magnesium solution condensed on the outer circumferential surface of the combustion chamber 510 of the condenser 500, and a magnesium solution is disposed below the molten metal storage tank 555. The discharge line 560 for discharging the outside is connected.

A magnesium melting furnace 550 is installed around the outer periphery of the molten metal storage tank 555 below the condenser 500 to heat the molten metal storage tank 555 to maintain a constant temperature.

Inside the magnesium melting furnace 550, as shown in FIG. 5, a plurality of swing-type burners 535 are provided in the tangential direction of the outer circumferential surface of the molten metal storage tank 555 to heat the molten metal storage tank 555.

In addition, the heat reduction apparatus for producing magnesium of the present embodiment preferably further includes a vacuum pump 600 connected to each of the plurality of condensers 500 to vacuum the inside of the condenser 500.

The vacuum pump 600 is a vacuum source for making the internal atmosphere of the condenser 500 into a vacuum, and is connected to each condenser 500 via a vacuum pipe 520 provided at the inner center of the condenser 500.

Therefore, in the heat reduction apparatus for manufacturing magnesium of the present embodiment, the magnetic heat exchange type burner 530 is downward from the upper end in the center of the separate condenser 500 which is separated from the heat reduction reaction tube 410 and installed through the connection pipe 415. The combustion chamber 510 is provided with a plurality.

In the center of the combustion chamber 510, the heat reduction reaction tube 410 and the vacuum pipe 520 for maintaining the condenser 500 in a vacuum are installed in the longitudinal direction, so that the magnesium vapor during the heat reduction reaction is a heat reduction reaction tube ( When the 410 is introduced into the condenser 500, the condenser 500 is introduced along the diagonal line in the inclination direction, so that the condenser 500 is attached to the lower end of the outer wall of the combustion chamber 510 installed at the center of the condenser 500.

When the heat reduction reaction is completed, the vacuum pump 600 is first turned off to release the vacuum of the heat reduction reaction tube 410 and the condenser 500, and is installed in the connection pipe 415 of the atmospheric condenser 500. Since the inert gas is injected from the inert gas inlet 417 installed to protect the Google valve, which is the shutoff valve 450, the remaining magnesium vapor is emptied from the heat reduction reaction tube 410, and the connection pipe used for condensation of the magnesium vapor ( Shut off the shut-off valve 450 on the 415, open the lower lid 412 of the heat reduction reaction tube 410 to discharge the residue residue.

When the discharge is completed, the lower lid 412 is closed, the upper lid 411 is opened, the raw material is charged, and the upper lid 411 is closed again. And open the shut-off valve 450 on the connection pipe 415 of the condenser 500 in the standby state, in order to increase the temperature around the shut-off valve 450 to supply an excessive amount of the protective inert gas of the opposite connection pipe 415 to the connection pipe The temperature of 415 is raised and the vacuum pump 600 is started to perform a heat reduction reaction.

The condenser 500 in which the magnesium crown 511 is condensed is melted by gas injection of flux to the magnesium crown 511 while the temperature of the upper end of the self-heating burner is increased to about 800 degrees. At this time, it is preferable that the plus used contains magnesium chloride and some sodium chloride as a main component.

 The molten magnesium crown 511 is then conveyed through a closed pipe to a refinery installed at the bottom, where it is finally refined and cast into an ingot through an alloying process.

6 and 7, two condensers 500 are provided in one heat reduction reaction tube 410 in order to continuously operate the separate condenser 500 alternately as shown in FIGS. 6 and 7. Is connected, the shut-off valve 450 is to open and close the role of the replacement of the condenser 500.

To this end, in the present embodiment, the Google plate-type shutoff valve 450 is adopted to maintain the vacuum at a high temperature while using a metal chamber, and the opening plate 701 when the connecting pipe 415 of the condenser 500 is opened. In the case of closing the connecting pipe 415 of the condenser 500, the blocking plate 702 is used.

As shown in FIG. 6, the shutoff valve 450 is formed of a goggle plate 451 having an open plate 701 formed at a lower portion thereof and a blockage plate 702 formed at an intermediate portion thereof, such that the shutoff valve 450 moves upward. In one case, the connecting pipe 415 is opened, and as shown in FIG. 7, when the shutoff valve 450 is moved downward, the plate is electrically driven to slide up and down so that the connecting pipe 415 is closed. 415) to open and close.

8 is a flowchart illustrating a method of preparing magnesium using a heat reduction device for manufacturing magnesium according to an embodiment of the present invention.

As shown in Figure 8, the magnesium production method using the heat reduction apparatus for producing magnesium of the present embodiment, the step of generating magnesium steam (S10), supplying magnesium steam (S20), condensing magnesium steam ( S30), the step of discharging the magnesium (S40), and comprises the step of refining magnesium (S50).

In the step of generating magnesium steam (S10), calcined dolomite mixed with calcined dolomite, ferrosilicon and fluorite powder is heated to generate magnesium vapor. Specifically, a molded briquette is formed by mixing calcite dolomite powder produced by calcining dolomite with silicon and aluminum metal or a ferrosilicon or ferrosilicon aluminum alloy powder containing them as a reducing agent and a fluorite powder used as a catalyst at a predetermined ratio.

Charge the molded article briquettes into the upper portion of the vertical heat reduction reaction tube 410 to fill the interior of the heat reduction reaction tube 410, close the upper lid 411, installed on the upper side of the heat reduction reaction tube 410 The connection pipe 415 of one condenser 500 of the two condenser 500 is cut off using a shutoff valve 450 that blocks high temperature vacuum, and the connection pipe 415 of the other condenser 500 is installed. The shutoff valve 450 is opened.

Then, the vacuum pump 600 connected to the vacuum pipe 520 installed on the top of the condenser 500 is started, so that the heat reduction reaction tube 410 communicating with the top of the condenser 500 is made into a vacuum, Installed in the heat reduction furnace 400 heated to a high temperature by the burner 430 The molded briquettes inside the heat reduction reaction tube 410 are heated to a temperature of about 1000 ° C. or more to generate a magnesium vapor by thermal reduction reaction. do.

In the step of supplying magnesium steam (S20), the magnesium vapor generated in the heat reduction reaction tube 410 is distributed to each condenser 500 and alternately supplied. In the step of condensing the magnesium vapor (S30), the magnesium vapor supplied from the heat reduction reaction tube 410 is condensed in the condenser 500.

Magnesium (Mg) vapor generated in the heat reduction reaction tube 410 is moved to the upper portion of the heat reduction reaction tube 410 is separated from the heat reduction reaction tube 410 and separated through a connection pipe 415 separated condenser ( Condensation at 500).

The connecting pipe 415 between the heat reduction reaction tube 410 and the condenser 500 functions as a duct for discharging a part of the combustion gas of the regenerative burner 430 through the stack, and has a temperature range of 1100 to 850 ° C. The upper end to be maintained is installed as a low temperature zone. The condenser 500 connected through the connection pipe 415 is maintained in a heat storage state having a temperature of about 400 to 800 degrees.

In this case, when the magnesium vapor generated in the heat reduction reaction tube 410 is supplied to the condenser 500 equipped with the magnetic heat exchange burner 530 via the connecting pipe 415, the combustion chamber 510 is rotated while turning the center of the condenser 500. Deposition is deposited on the outer surface of the).

Thereafter, when the heat reduction reaction of the charged raw material is primarily terminated in the heat reduction reaction tube 410 installed in the heat reduction reactor 400, the upstream of the shutoff valve 450 in which the connection pipe 415 is blocked. The part is supplied with an inert gas through the inlet 417 to cool the inert gas and releases the vacuum atmosphere formed inside the heat reduction reaction tube 410, and then the heat reduction path 400 and the one condenser 500. Shut off the shut-off valve 450 installed in the connection pipe 415 between, open the lower lid 412 of the heat reduction reaction tube 410 to discharge the reducing slag, the upper lid 411 by opening the upper After charging the molded briquettes stored in the hopper into the heat reduction reaction tube 410, the upper lid 411 is closed.

Then, the shutoff valve 450 installed in the connecting pipe 415 connected to the other condenser 500 is opened and the lower end of the heat reduction reaction tube 410 or from the front end of the shutoff valve 450 of the condenser 500. The vacuum pump 600 is operated while supplying a small amount of air or inert gas. Therefore, the temperature of the connection pipe 415 is raised to the temperature of the heat reduction atmosphere by the heated gas heated while passing through the heat reduction reaction tube 410, and if the vacuum degree is maintained to about 0.1 torr, the heat reduction reaction proceeds again. The magnesium crown 511 is condensed at 500.

At this time, the shutoff valve 450 installed in the connection pipe 415 connected to the other condenser 500 has a small amount of inert gas (Ar, N ₂ ) on both sides of the shutoff valve 450 so that deformation or adhesion of magnesium vapor does not occur at high temperatures. Will be supplied.

In the discharging magnesium (S40), the condensed magnesium is dissolved and discharged. Specifically, the condenser condensed with magnesium metal melts the attached magnesium crown 511 by heating with a burner, and supplies a flux component through a separate supply port 540 so as to dissolve the surface of the magnesium crown 511. Dispersing in promotes dissolution.

In the step of refining magnesium (S50), the dissolved magnesium is heated to be maintained in a solution state in the molten metal storage tank 555 installed at the lower part of the condenser 500, and discharged to a refining furnace at the lower end to be refined.

At this time, the molten magnesium is dissolved in the melting furnace 550 installed at the lower end of the condenser 500, transferred to the refining furnace through the discharge line 560, refined and alloyed, and then cast in a casting machine to make an ingot.

As described above, according to the present invention by connecting a plurality of condenser to one heat reduction reaction tube and alternately distributed condensation magnesium to perform condensation work alternately, the magnesium crown deposited on the condenser while minimizing the charge discharge time It provides the effect of maximizing the recovery rate of and improving the production efficiency of magnesium.

In addition, by connecting the vacuum pump to the condenser to configure the heat reduction reaction tube and the condenser in a vacuum atmosphere to facilitate the vacuum heat reduction reaction, install a connecting pipe between the heat reduction reaction tube and the condenser and connect in the tangential direction of the condenser This facilitates the inflow of magnesium vapor into the condenser and facilitates condensation by the flow of magnesium vapor in the condenser, and provides a shut-off valve in the connection pipe provided between the heat reduction reactor and the condenser to The condenser can be fed alternately.

In addition, a burner may be installed around the combustion chamber of the condenser to facilitate dissolution of magnesium attached to the outer surface of the combustion chamber, and a supply port for injecting flux may be installed at the upper end of the condenser to promote dissolution of magnesium.

In addition, a magnesium melting furnace is installed around the molten metal storage tank installed in the lower part of the condenser to prevent the fixation of magnesium solution by heating the molten metal storage tank to maintain a constant temperature, and a plurality of turns in the tangential direction of the outer peripheral surface of the molten metal storage tank in the tangential direction. The type burner is installed to provide an effect of efficiently heating the molten metal storage tank.

In addition, it is possible to prevent deterioration of the quality contaminated with oxide in the process of processing magnesium in the solid phase, improve the recovery rate of magnesium without loss due to exposure to the air in the middle process, and to reduce the slag as a residue of residue under the sealed condition. Emissions can be carried out continuously, which allows for process automation and high productivity operation.

The present invention described above can be embodied in many other forms without departing from the spirit or main features thereof. Therefore, the above embodiments are merely illustrative in all respects and should not be construed as limiting.

400: heat reduction furnace 410: heat reduction reaction tube
500: condenser 600: vacuum pump

Claims (11)

As a heat reduction device for manufacturing magnesium used in the magnesium manufacturing process,
A heat reduction furnace for heating the molded briquettes in which the calcined dolomite, ferrosilicon, and fluorite powder are mixed and molded;
A heat reduction reaction tube installed inside the heat reduction furnace and charged with the molded briquettes and heated by the heat reduction reactor; And
And a plurality of condensers installed outside of the heat reduction reactor and connected to the heat reduction reaction tubes, respectively, to condense alternating magnesium vapors generated in the heat reduction reaction tubes.
And a supply port for injecting magnesium chloride flux for refining magnesium to facilitate dissolution of magnesium at an upper end of the condenser. The method of claim 1,
And a vacuum pump connected to each of the plurality of condensers to vacuum the inside of the condenser. The method of claim 1,
A connection pipe is connected between the heat reduction reaction tube and the condenser, and the connection pipe is connected to the outer circumferential surface of the condenser in a tangential direction. The method of claim 3, wherein
And a shutoff valve is installed in the connection pipe to alternately supply magnesium vapor to each condenser. The method of claim 1,
A cylindrical combustion chamber is installed at the upper end of the condenser, and a plurality of self-heat exchanger-type burners are installed around the inner circumferential surface of the combustion chamber to heat-dissolve the magnesium crown attached to the outer circumferential surface of the combustion chamber. Reduction device. delete The method of claim 1,
And a molten metal storage tank configured to store a magnesium solution condensed at the inner upper end of the condenser and flowing down at an inner lower end of the condenser. The method of claim 7, wherein
And a magnesium melting furnace is installed below the condenser to prevent the fixation of the magnesium solution by heating the molten metal reservoir to maintain a constant temperature. The method of claim 8,
And a plurality of swing-type burners installed in a tangential direction of the outer circumferential surface of the molten metal storage tank to heat the molten metal storage tank. A method for producing magnesium using the heat reduction device for producing magnesium according to claim 1,
Heating the molded briquettes mixed with the calcined dolomite, ferrosilicon and fluorite powder to generate magnesium vapor;
Distributing the produced magnesium vapor to each condenser and supplying it alternately;
Condensing the supplied magnesium vapor in a condenser; And
Dissolving and discharging the condensed magnesium; Method of producing magnesium using a heat reduction device for producing magnesium, characterized in that it comprises a. 11. The method of claim 10,
The molten magnesium is heated to maintain the solution in the molten metal storage tank installed in the lower part of the condenser and discharged to the refining furnace at the bottom of the refinement to manufacture magnesium using the heat reduction device for manufacturing magnesium Way.

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