AU2020103436A4 - Continuous production equipment and method of magnesium - Google Patents
Continuous production equipment and method of magnesium Download PDFInfo
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- AU2020103436A4 AU2020103436A4 AU2020103436A AU2020103436A AU2020103436A4 AU 2020103436 A4 AU2020103436 A4 AU 2020103436A4 AU 2020103436 A AU2020103436 A AU 2020103436A AU 2020103436 A AU2020103436 A AU 2020103436A AU 2020103436 A4 AU2020103436 A4 AU 2020103436A4
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- isolation valve
- reduction chamber
- vacuum
- chamber
- flap
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 40
- 239000011777 magnesium Substances 0.000 title claims abstract description 40
- 238000010924 continuous production Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000002893 slag Substances 0.000 claims abstract description 71
- 238000002955 isolation Methods 0.000 claims abstract description 68
- 238000010438 heat treatment Methods 0.000 claims abstract description 50
- 238000007599 discharging Methods 0.000 claims abstract description 41
- 239000010439 graphite Substances 0.000 claims abstract description 17
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 239000010936 titanium Substances 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 239000010459 dolomite Substances 0.000 claims description 21
- 229910000514 dolomite Inorganic materials 0.000 claims description 21
- 239000010949 copper Substances 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 230000009850 completed effect Effects 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000001351 cycling effect Effects 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 abstract description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
- C22B26/22—Obtaining magnesium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
- F27B14/061—Induction furnaces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a continuous production equipment and method of magnesium,
including a feeding device, a reduction chamber, a crystallizer and a slag discharging chamber,
which are all provided with a vacuum detection device and connected with a vacuum unit.
Wherein, the feeding device is located above the reduction chamber and connected with it, and
there is a material isolation valve between them. The slag discharging chamber is arranged
directly below the reduction chamber and connected with it, and there is a slag discharging
isolation valve between them. The crystallizer is connected with above the reduction chamber.
The inner wall of the reduction chamber is a graphite crucible with titanium boride in the
surface plasma sprayed. There is no other heating device in the reduction chamber, except an
electromagnetic induction heating device, so that the reduction chamber has large space and a
fast and uniform heating, which can significantly save the reaction time and avoid the slag
sticking phenomenon.
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Figure 1
Description
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Figure 1
PATENTS ACT 1990
Continuous production equipment and method of magnesium
The invention is described in the following statement:-
Continuous production equipment and method of magnesium
The invention relates to the technical field of magnesium production equipment, in
particular to the continuous production equipment and method of magnesium.
In the existing technology, the magnesium production equipment is provided with a
reduction chamber, adopting resistance heating. Once the diameter of the reduction
chamber is slightly larger, it will result in uneven heating. In addition, multilayer heating
plates and electrode heating are used in the reduction chamber. Due to the existence of
these heating plates and electrodes, the actual application space is reduced. More
importantly, in the vicinity of the heating plates and electrodes, the temperature will be
higher than other areas, and the slag will become molten and the slag sticking
phenomenon appears. This is also a common and difficult problem in shaft furnace
continuous magnesium smelting.
The invention aims to solve the problems existing in the prior art by providing a
continuous production equipment and method of magnesium. In the invention, the
reduction chamber is provided an electromagnetic induction heating device without other
heating device, so that it has large space and a fast and uniform heating, which can
significantly save the reaction time and avoid the slag sticking phenomenon.
To achieve the above purpose, the invention provides the following scheme.
The invention provides a continuous production equipment composed of a feeding
device, a reduction chamber, a crystallizer and a slag discharging chamber, which are all
provided with a vacuum detection device and connected with a vacuum unit. Wherein,
the feeding device is located above the reduction chamber and connected with it, and
there is a material isolation valve between them. The slag discharging chamber is
arranged directly below the reduction chamber and connected with it, and there is a slag
discharging isolation valve between them. The crystallizer is connected with above the
reduction chamber. The inner wall of the reduction chamber is a graphite crucible with
titanium boride in the surface plasma sprayed. The reduction chamber is provided with an
electromagnetic induction heating device, which is further electrically connected with a
heating power supply.
Preferably, the feeding device is communicated with the reduction chamber through a
feeding pipe. Wherein, there is a material isolation valve and a first vacuum valve
arranged on the feeding pipe.
Preferably, the reduction chamber is communicated with the crystallizer through a
crystallizing tube. Wherein, a graphite filter is arranged at the connection between the
front end of the crystallizer and the crystallizing tube. Magnesium vapor in the reduction
chamber can enter the crystallizer through the crystallizing tube and the graphite filter in
turn. The crystallizing tube is provided with a second vacuum valve, and the lower end of
the crystallizer is connected with a receiving tank.
Preferably, the crystallizer has a double outer wall structure. Between the double outer
walls, there is a spiral wound electromagnetic heating coil, which is a copper tube and electrically connected with the heating power supply. The copper tube is used for supplying cooling water.
Preferably, the outer walls of the reduction chamber and the slag discharging chamber are
both double-layer structures. The double outer walls are used for cooling water. The
electromagnetic induction heating device comprises a spiral wound electromagnetic coil
which is arranged in the reduction chamber and electrically connected with the heating
power supply.
Preferably, the vacuum detection device is connected with a control system, and a
reduction temperature measuring device is arranged on the outer wall of the reduction
chamber. Wherein, the reduction temperature measuring device is connected with the
control system, and the control system can send control signals to the vacuum unit and
the heating power supply respectively.
Preferably, the slag discharging isolation valve comprises a first flap isolation valve and a
second flap isolation valve. Wherein, the first flap isolation valve is arranged at the
bottom of the reduction chamber, and the second flap isolation valve is arranged at the
top of the slag discharging chamber. The positions of the first flap isolation valve and the
second flap isolation valve are matched. The electromagnetic induction heating device is
arranged on the first flap isolation valve. The first flap isolation valve and the second flap
isolation valve are connected with the hydraulic system, which can control the opening
and closing of the first flap isolation valve and the second flap isolation valve.
Preferably, a slag collecting tank is arranged in the slag discharging chamber. Moreover,
there is a mobile car below the slag collecting tank, and the mobile car can move in the
slag discharging chamber.
Preferably, the vacuum unit comprises a first vacuum unit and a second vacuum unit.
Wherein, the first vacuum unit is connected with the crystallizer through a third vacuum
valve, and connected with the reduction chamber through a fourth vacuum valve; the
second vacuum unit is connected with the feeding device through the fifth vacuum valve
and connected with the slag discharging chamber through the sixth vacuum valve.
The invention also provides a continuous production method of magnesium utilizing
above mentioned continuous production equipment.
1) Grinding the calcined dolomite material to 120 meshes by a crusher and mixing
additive and reducing agent based on a certain proportion. Then the dolomite ball is
pressed by dry method.
2) Adding the dolomite ball into the feeding device and opening the first vacuum valve
and material isolation valve to let the dolomite ball enter the reduction chamber. Then,
closing the first vacuum valve and material isolation valve to isolate the reduction
chamber and the feeding device.
3) Starting the first vacuum unit and the second vacuum unit, and vacuuming the
reduction chamber, slag chamber and crystallizer to the working vacuum degree.
4) Starting the heating power supply to supply power to the electromagnetic induction
heating device and heat the reduction chamber. Through the control system, the
temperature of the reduction chamber is controlled to rise to the process temperature. The
magnesium in the dolomite ball rises to the crystallizer in the form of steam. The
magnesium vapor in the crystallizer crystallizes when it is cooled, and forms liquid in the
crystallizer and enters into the receiving tank.
) After the reaction of dolomite ball is completed, closing the second vacuum valve,
replacing the receiving tank with an empty one, vacuuming the crystallizer to the working
vacuum degree, and opening the second vacuum valve.
6) Through the control of the hydraulic system, opening the second flap isolation valve
and the first flap isolation valve in turn to let the slag fall into the slag collecting tank.
Then closing the second flap isolation valve and the first flap isolation valve in turn and
opening the slag discharging chamber to replace the slag collecting tank with an empty
one. Vacuuming the slag discharging chamber to the working vacuum degree through the
second vacuum unit.
7) Adding dolomite balls to the feeding device, vacuuming the feeding device to the
working vacuum degree through the second vacuum unit, and then cycling steps 2 to 6 in
turn.
Compared with the prior art, the invention achieves the following technical effects.
The reduction chamber is provided with an electromagnetic induction heating device to
make the reduction chamber heated evenly, and the wall of the reduction chamber is set
as a graphite crucible. As a heating body to conduct heat, the graphite crucible can heat
the reduction chamber rapidly, so as to realize the rapid and uniform heating function in
the reduction chamber and significantly save the reaction time. In addition, due to the
uniform heating, there will be no local high temperature, and there is titanium boride
plasma sprayed on the surface of the graphite crucible, which does not react with the
reduction slag, thus avoiding the occurrence of slag sticking.
-'7
In order to more clearly explain the embodiments of the invention or the technical
solutions in the prior art, the following will briefly introduce the figures needed in the
embodiments. Obviously, the figures described below are only some embodiments of the
invention. For those of ordinary skill in the art, other figures can be obtained from these
figures without paying creative labour.
Figure. 1 is the structural diagram of the continuous production equipment for
magnesium of the invention.
In figures, 1- feeding device, 2- material isolation valve, 3- first vacuum valve, 4
temperature control table, 5- control system, 6- heating power supply, 7- fifth vacuum
valve, 8- sixth vacuum valve, 9- second vacuum unit, 10- slag discharging chamber, 11
slag collecting tank, 12- mobile car, 13- first vacuum unit, 14- fourth vacuum valve, 15
second flap isolation valve, 16- first flap isolation valve, 17- reduction chamber,18
electromagnetic induction heating device,19- reduction temperature measuring device,
- third vacuum unit, 21- crystallizer, 22- copper tube, 23-graphite filter, 24
crystallizing temperature measuring device, 25- second vacuum valve.
The technical scheme in the embodiment of the invention will be described clearly and
completely in combination with the figures in the embodiments of the invention.
Obviously, the described embodiments are only part of the embodiments of the invention,
not all of them. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in the art without paying creative labour belong to the protection scope of the invention.
In order to make the above-mentioned purposes, features and advantages of the invention
more obvious and easier to be understand, the present invention is further described in
detail in combination with the figures and specific embodiments.
As shown in Figure 1, the invention provides a continuous production equipment of
magnesium, including a feeding device (1), a reduction chamber (17), a crystallizer (21)
and a slag discharging chamber (10), which are all provided with a vacuum detection
device and connected with a vacuum unit. Wherein, the feeding device (1) is located
above the reduction chamber (17) and connected with it, and there is a material isolation
valve (2) between them to isolate them, so as to maintain the vacuum state of the
reduction chamber (17) .
The slag discharging chamber 10 is set directly below the reduction chamber (17) and is
fixed and connected by bolts to form a vertical double chamber structure. The outer walls
of the reduction chamber (17) and the slag discharging chamber (10) are double-layer
structures, and the outer walls of the double-layer outer walls are used for cooling water.
The reduction chamber (17) is connected with above the slag discharging chamber (10),
and there is a slag discharging isolation valve between them. During the reaction, the slag
discharging isolation valve is closed. After the reaction in the reduction chamber 17 is
completeds, it is necessary to open the slag discharging isolation valve to release the
reduction slag.
A crystallizer (21) is communicated above the reduction chamber (17) to facilitate the
magnesium vapor to enter the crystallizer (21) upward for crystallization. The inner wall of the reduction chamber (17) is a graphite crucible. There is plasma sprayed titanium boride on the surface of the graphite crucible, which does not react with the reduction slag, thus avoiding the occurrence of slag sticking. The reduction chamber (17) is provided with an electromagnetic induction heating device (18), which includes a spiral wound electromagnetic coil. The coil is arranged in the reduction chamber (17) and is electrically connected with the heating power supply (6). The electromagnetic induction heating device (18) can heat the reduction chamber (17) evenly, and the graphite crucible, as a heating body to conduct heat, can heat the reduction chamber (17) rapidly, so as to realize the rapid and uniform heating function in the reduction chamber (17) and significantly save the reaction time.
Specifically, the feeding device (1) is connected with the reduction chamber (17) through
the feeding pipe. The material isolation valve (2) and a first vacuum valve (3) are
arranged on the feeding pipe
The reduction chamber (17) is communicated with the crystallizer (21) through a
crystallizing tube. Wherein, a graphite filter (23), used for filtering dust and preventing
temperature diffusion, is arranged at the connection between the front end of the
crystallizer (21) and the crystallizing tube. Magnesium vapor in the reduction chamber
(17) can enter the crystallizer (21) through the crystallizing tube and the graphite filter
(23) in turn. The crystallizing tube is provided with a second vacuum valve (25), and the
lower end of the crystallizer (21) is connected with a receiving tank. The crystallizer (21)
has a double outer wall structure. Between the double outer walls, there is a spiral wound
electromagnetic heating coil, which is a copper tube (22) and electrically connected with
the heating power supply (6). The copper tube (22) is used for supplying cooling water.
Moreover, the crystallizing temperature measuring device (24) is set on the outer wall of
the inner layer of the crystallizer (21) to ensure that the crystallization temperature is
controlled at 650 °C under the condition of heating or water cooling, and the magnesium
vapor is cooled and crystallized in the crystallizer (21) to form liquid into the receiving
tank. When the receiving tank is full, the second vacuum valve (25) can be temporarily
closed to replace the full receiving tank with an empty one. The temperature of graphite
filter (23) is 1000 °C, so that magnesium can crystallize here. When a certain amount of
titanium and zirconium are placed in the receiving tank, iron reacts with titanium and/or
zirconium in liquid magnesium and deposits at the bottom to reach the high purity level
of magnesium, up to 99.9%.
A slag collecting tank (11) is arranged in the slag discharging chamber (10). Moreover,
there is a mobile car (12) below the slag collecting tank (11), and the mobile car (12) can
move in the slag discharging chamber (10). The slag discharging isolation valve
comprises a first flap isolation valve (16) and a second flap isolation valve (15). Wherein,
the first flap isolation valve (16) is arranged at the bottom of the reduction chamber (17),
and the second flap isolation valve (15) is arranged at the top of the slag discharging
chamber (10). The positions of the first flap isolation valve (16) and the second flap
isolation valve (15) are matched. With the turnover plate structure, the bottom of the
whole reduction chamber (17) is basically opened, so that the reduction slag in the
reduction chamber (17) can be discharged instantly, avoiding the phenomenon of slow
slag discharge, easy blockage and difficult discharge. The first flap isolation valve (16)
and the second flap isolation valve (15) are connected with the hydraulic system, which can control the opening and closing them. The electromagnetic induction heating device
(18) is arranged on the first flap isolation valve (16).
Specifically, the vacuum unit comprises a first vacuum unit (13) and a second vacuum
unit (9). Wherein, the first vacuum unit (13) is connected with the crystallizer (21)
through a third vacuum valve (20), and connected with the reduction chamber (17)
through a fourth vacuum valve (14); the second vacuum unit (9) is connected with the
feeding device (1) through the fifth vacuum valve (5) and connected with the slag
discharging chamber (10) through the sixth vacuum valve (8). Moreover, the vacuum
detection device is connected with a control system (5), and a reduction temperature
measuring device (19) is arranged on the outer wall of the inner layer of the reduction
chamber (17). Besides, the crystallizing temperature measuring device (24) is set on the
outer wall of the inner layer of the crystallizer (21). The crystallizing temperature
measuring device (24) and the reduction temperature measuring device (19) are both
connected with the control system (5), and the measured temperature is displayed through
the temperature control table (4) on the control system (5). Meanwhile, the control system
(5) can send control signals to the vacuum unit and the heating power supply (6)
respectively, thereby maintaining the vacuum state, reduction temperature and
crystallization temperature. Moreover, the hydraulic system and all vacuum valves in the
embodiment are connected with the control system (5), which controls their opening and
closing states.
The invention also provides a continuous production method of magnesium utilizing
above mentioned continuous production equipment.
1) Grinding the calcined dolomite material to 120 meshes by a crusher and mixing
additive and reducing agent (ferrosilicon or silicon aluminium alloy, 120 meshes) based
on a certain proportion. Then the dolomite ball is pressed by dry method.
2) Adding the dolomite ball into the feeding device (1) and opening the first vacuum
valve (3) and material isolation valve (2) to let the dolomite ball enter the reduction
chamber (17). Then, closing the first vacuum valve (3) and material isolation valve (2) to
isolate the reduction chamber (17) and the feeding device (1).
3) Starting the first vacuum unit (13) and the second vacuum unit (9), and vacuuming the
reduction chamber (17), slag discharging chamber (10) and crystallizer (21) to the
working vacuum degree.
4) Starting the heating power supply (6) to supply power to the electromagnetic induction
heating device (18) and heat the reduction chamber (17). Through the control system (5),
the temperature of the reduction chamber (17) is controlled to rise to the process
temperature. The magnesium in the dolomite ball rises to the crystallizer (21) in the form
of steam. The crystallizer (21) is controlled to keep at the crystallization temperature
(600-650°C) by the control system (5). The magnesium vapor in the crystallizer (21)
crystallizes when it is cooled, and forms liquid in the crystallizer (21) and enters into the
receiving tank.
) After the reaction of dolomite ball is completed, closing the second vacuum valve (25),
replacing the receiving tank with an empty one, vacuuming the crystallizer (21) to the
working vacuum degree, and opening the second vacuum valve (25).
6) Through the control of the hydraulic system, opening the second flap isolation valve
(15) and the first flap isolation valve (16) in turn to let the slag fall into the slag collecting tank (11). Then closing the second flap isolation valve (15) and the first flap isolation valve (16) in turn and opening the slag discharging chamber (10) to replace the slag collecting tank (11) with an empty one. Vacuuming the slag discharging chamber (10) to the working vacuum degree through the second vacuum unit (9).
7) Adding dolomite balls to the feeding device (1), vacuuming the feeding device (1) to
the working vacuum degree through the second vacuum unit (9), and then cycling steps 2
to 6 in turn.
Finally, in this embodiment, the current efficiency reaches 90%, the recovery rate of
magnesium is 90%, the purity of magnesium is 99.9%, and the content of magnesium
oxide in reduction slag is less than 6%, which can be used as cement raw material.
In this specification, specific embodiments are applied to explain the principle and
implementation mode of the invention, and the description of the above embodiments is
only used to help understand the method and core idea of the invention; meanwhile, for
ordinary technical personnel in the field, according to the idea of the invention, there will
be changes in the specific implementation mode and application scope. To sum up, the
contents of the specification should not be interpreted as a limitation of the invention.
Claims (10)
1. The continuous production equipment for magnesium, characterized by including a
feeding device, a reduction chamber, a crystallizer and a slag discharging chamber, which
are all provided with a vacuum detection device and connected with a vacuum unit.
Wherein, the feeding device is located above the reduction chamber and connected with
it, and there is a material isolation valve between them. The slag discharging chamber is
arranged directly below the reduction chamber and connected with it, and there is a slag
discharging isolation valve between them. The crystallizer is connected with the
reduction chamber. The inner wall of the reduction chamber is a graphite crucible with
titanium boride in the surface plasma sprayed. The reduction chamber is provided with an
electromagnetic induction heating device, which is further electrically connected with a
heating power supply.
2. The continuous production equipment for magnesium according to claim 1,
characterized in that the feeding device is communicated with the reduction chamber
through a feeding pipe. Wherein, there is a material isolation valve and a first vacuum
valve arranged on the feeding pipe.
3. The continuous production equipment for magnesium according to claim 1,
characterized in that the reduction chamber is communicated with the crystallizer through
a crystallizing tube. Wherein, a graphite filter is arranged at the connection between the
front end of the crystallizer and the crystallizing tube. Magnesium vapor in the reduction
chamber can enter the crystallizer through the crystallizing tube and the graphite filter in
turn. The crystallizing tube is provided with a second vacuum valve, and the lower end of
the crystallizer is connected with a receiving tank.
4. The continuous production equipment for magnesium according to claim 1,
characterized in that the crystallizer has a double outer wall structure. Between the double
outer walls, there is a spiral wound electromagnetic heating coil, which is a copper tube
and electrically connected with the heating power supply. The copper tube is used for
supplying cooling water.
5. The continuous production equipment for magnesium according to claim 1,
characterized in that the outer walls of the reduction chamber and the slag discharging
chamber are both double-layer structures. The double outer walls are used for cooling
water. The electromagnetic induction heating device comprises a spiral wound
electromagnetic coil which is arranged in the reduction chamber and electrically
connected with the heating power supply.
6. The continuous production equipment for magnesium according to claim 5,
characterized in that the vacuum detection device is connected with a control system, and
a reduction temperature measuring device is arranged on the outer wall of the reduction
chamber. Wherein, the reduction temperature measuring device is connected with the
control system, and the control system can send control signals to the vacuum unit and
the heating power supply respectively.
7. The continuous production equipment for magnesium according to claim 1,
characterized in that the slag discharging isolation valve comprises a first flap isolation
valve and a second flap isolation valve. Wherein, the first flap isolation valve is arranged
at the bottom of the reduction chamber, and the second flap isolation valve is arranged at
the top of the slag discharging chamber. The positions of the first flap isolation valve and
the second flap isolation valve are matched. The electromagnetic induction heating device is arranged on the first flap isolation valve. The first flap isolation valve and the second flap isolation valve are connected with the hydraulic system, which can control the opening and closing of the first flap isolation valve and the second flap isolation valve.
8. The continuous production equipment for magnesium according to claim 1,
characterized in that a slag collecting tank is arranged in the slag discharging chamber.
Moreover, there is a mobile car below the slag collecting tank, and the mobile car can
move in the slag discharging chamber.
9. The continuous production equipment for magnesium according to claim 1,
characterized in that the vacuum unit comprises a first vacuum unit and a second vacuum
unit. Wherein, the first vacuum unit is connected with the crystallizer through a third
vacuum valve, and connected with the reduction chamber through a fourth vacuum valve;
the second vacuum unit is connected with the feeding device through the fifth vacuum
valve and connected with the slag discharging chamber through the sixth vacuum valve.
10. The continuous production method of magnesium utilizing any continuous production
equipment in claims 1-9, characterized by including following steps.
1) Grinding the calcined dolomite material to 120 meshes by a crusher and mixing
additive and reducing agent based on a certain proportion. Then the dolomite ball is
pressed by dry method.
2) Adding the dolomite ball into the feeding device and opening the first vacuum valve
and material isolation valve to let the dolomite ball enter the reduction chamber. Then,
closing the first vacuum valve and material isolation valve to isolate the reduction
chamber and the feeding device.
3) Starting the first vacuum unit and the second vacuum unit, and vacuuming the
reduction chamber, slag chamber and crystallizer to the working vacuum degree.
4) Starting the heating power supply to supply power to the electromagnetic induction
heating device and heat the reduction chamber. Through the control system, the
temperature of the reduction chamber is controlled to rise to the process temperature. The
magnesium in the dolomite ball rises to the crystallizer in the form of steam. The
magnesium vapor in the crystallizer crystallizes when it is cooled, and forms liquid in the
crystallizer and enters into the receiving tank.
) After the reaction of dolomite ball is completed, closing the second vacuum valve,
replacing the receiving tank with an empty one, vacuuming the crystallizer to the working
vacuum degree, and opening the second vacuum valve.
6) Through the control of the hydraulic system, opening the second flap isolation valve
and the first flap isolation valve in turn to let the slag fall into the slag collecting tank.
Then closing the second flap isolation valve and the first flap isolation valve in turn and
opening the slag discharging chamber to replace the slag collecting tank with an empty
one. Vacuuming the slag discharging chamber to the working vacuum degree through the
second vacuum unit.
7) Adding dolomite balls to the feeding device, vacuuming the feeding device to the
working vacuum degree through the second vacuum unit, and then cycling steps 2 to 6 in
turn.
-1/1-
Figure 1
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114262805A (en) * | 2021-12-27 | 2022-04-01 | 西安交通大学 | Smelting-free compact metal magnesium ingot preparation device and method |
| CN117628900A (en) * | 2024-01-22 | 2024-03-01 | 中信戴卡股份有限公司 | Three-chamber melting furnace for aluminum alloy regeneration |
-
2020
- 2020-11-13 AU AU2020103436A patent/AU2020103436A4/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114262805A (en) * | 2021-12-27 | 2022-04-01 | 西安交通大学 | Smelting-free compact metal magnesium ingot preparation device and method |
| CN114262805B (en) * | 2021-12-27 | 2023-02-28 | 西安交通大学 | Smelting-free compact metal magnesium ingot preparation device and method |
| CN117628900A (en) * | 2024-01-22 | 2024-03-01 | 中信戴卡股份有限公司 | Three-chamber melting furnace for aluminum alloy regeneration |
| CN117628900B (en) * | 2024-01-22 | 2024-03-29 | 中信戴卡股份有限公司 | Three-chamber melting furnace for aluminum alloy regeneration |
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