CN113579240A - Centrifugal atomization preparation device for metal alloy and preparation method for zinc alloy - Google Patents
Centrifugal atomization preparation device for metal alloy and preparation method for zinc alloy Download PDFInfo
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- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
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Abstract
The invention provides a centrifugal atomization preparation device for metal alloy and a preparation method for zinc alloy, wherein the centrifugal atomization preparation device comprises an atomization bin and a metal smelting device, the atomization bin is of a double-cone structure, the middle part of the bottom of the atomization bin is provided with a conical protruding part, a centrifugal atomization disc is arranged above the conical protruding part, the atomization bin is provided with a material leakage opening, the material leakage opening and the centrifugal atomization disc are oppositely arranged, and an outlet of the metal smelting device is communicated with the material leakage opening; the centrifugal atomizing disk is connected with a driving mechanism positioned outside the atomizing bin through a connecting shaft, and the driving mechanism drives the centrifugal atomizing disk to rotate; the atomization bin is provided with a protective gas inlet for introducing protective gas; and a powder collecting mechanism is arranged at the bottom of the double-cone structure. By adopting the technical scheme of the invention, the motor is arranged outside the atomizing bin, so that the centrifugal atomizing disk is convenient to replace, the motor is convenient to maintain, the environment in the bin cannot be damaged, and the production efficiency is high.
Description
Technical Field
The invention belongs to the technical field of zinc alloy material preparation, and particularly relates to a centrifugal atomization preparation device for a metal alloy and a preparation method for the zinc alloy.
Background
The zinc alloy powder is mainly prepared by an atomization method. The atomization method mainly comprises two methods, namely water atomization and gas atomization, wherein the water atomization is to apply high-pressure water flow to molten zinc liquid to crush the zinc liquid and quickly solidify the zinc liquid to form zinc alloy powder; the gas atomization is that high pressure gas acts on molten zinc liquid, the zinc liquid is crushed into single liquid drops by airflow, and the liquid drops are cooled to form zinc alloy powder. Centrifugal atomization utilizes centrifugal force caused by mechanical high-speed rotation to break molten metal into fine liquid drops, and then the fine liquid drops are condensed into powder. The zinc alloy powder for the battery cathode material is required to have high purity and low impurity content, is very sensitive to harmful elements such as iron, nickel, copper and the like, and has high zinc melting point, strong corrosivity and very strict requirements on a centrifugal atomization device.
The existing centrifugal atomization device for preparing metal powder adopts a single conical atomization bin body, a high-speed motor or a motor connecting shaft is arranged in the middle position of the bin body, and when the motor and a centrifugal disc are replaced and maintained in the use process, the operation is complex, and the bin body environment cannot be maintained.
Disclosure of Invention
Aiming at the technical problems, the invention discloses a centrifugal atomization preparation device and a preparation method of metal alloy, which are convenient to maintain and cannot damage the environment in a bin.
In contrast, the technical scheme adopted by the invention is as follows:
a centrifugal atomization preparation device for metal alloy comprises an atomization bin and a metal smelting device, wherein the atomization bin is of a double-cone structure, the middle of the bottom of the atomization bin is provided with a conical protruding portion, a centrifugal atomization disc is arranged above the conical protruding portion, the atomization bin is provided with a material leakage port, the material leakage port and the centrifugal atomization disc are arranged oppositely, and an outlet of the metal smelting device is communicated with the material leakage port; the centrifugal atomizing disk is connected with a driving mechanism positioned outside the atomizing bin through a connecting shaft, and the driving mechanism drives the centrifugal atomizing disk to rotate;
the atomization bin is provided with a protective gas inlet for introducing protective gas;
and a powder collecting mechanism is arranged at the bottom of the double-cone structure.
By adopting the technical scheme, through the atomization bin with the double-cone structure, metal melt in the metal smelting device enters the atomization bin through the material leakage port, drips on the centrifugal atomization disc, is diffused to the edge of the rotary disc to form spheroidal liquid drops under the action of centrifugal force, contacts with protective gas in the atomization bin, is rapidly cooled to be powder, falls into the bottom of the cone on the outer side, and is collected by the material collecting mechanism. In this technical scheme, actuating mechanism arranges the outside in atomizing storehouse in, can be convenient for maintain, conveniently changes atomizing disk moreover, and can not destroy the interior environment of storehouse.
Furthermore, the atomizing bin with the double-cone structure is composed of a straight cylinder section positioned at the upper part and a conical section positioned at the lower part.
As a further improvement of the invention, the centrifugal atomization preparation device for the metal alloy comprises a protective gas circulating device, the atomization bin is provided with a protective gas circulating outlet, and the protective gas circulating device is respectively communicated with a protective gas inlet and a protective gas circulating outlet.
As a further development of the invention, the protective gas circulation device is connected to a protective gas production device.
As a further improvement of the invention, the leakage port is provided with a leakage bag, the bottom of the leakage bag is provided with a leakage nozzle, the leakage bag is provided with a heating member, and the leakage bag is connected with a leakage bag flow control member;
and a protective gas ring pipe is arranged around the leaky package and provided with a gas outlet for protecting the environment near the outlet of the leaky package, namely, the metal alloy in the leaky package comes out from the outlet, so that the protective gas can be protected. The protective gas loop pipe is connected with a protective gas circulating device. Further, the shielding gas inlet is communicated with the inlet of the shielding gas ring pipe.
By adopting the technical scheme, the nitrogen can be rapidly and uniformly distributed in the whole bin body, so that the protective gas is rapidly contacted with the metal melt, and the metal melt is rapidly atomized into metal powder.
The protective gas circulating device comprises a protective gas conveying device and a protective gas recovery device. The protective gas conveying device is positioned right above the atomization bin, the peripheries of the distribution leakage bags are arranged in an annular pipe, the protective gas conveying is divided into two loops, and the first loop is used for preparing high-purity protective gas by the protective gas preparation device; the second loop is used for recovering the protective gas in the atomization bin, part of the loop enters the protective gas conveying pipeline through the three-way valve, and part of the loop is directly emptied through the emptying valve. The protective gas recovery device ensures the circulation of the protective gas in the atomization bin, and the protective gas is positioned above the straight plate of the cone section at the center of the atomization bin. The recovered protective gas enters a protective gas conveying pipeline after being adsorbed and dedusted, and is fully mixed with the high-purity protective gas supplemented by the gas preparation device to form uniform protective gas with certain oxygen content and then conveyed into the atomization bin body, so that the homogenization of the oxygen content in the bin body is ensured.
Preferably, the protective gas is nitrogen.
As a further improvement of the invention, a smelting furnace and a holding furnace are arranged above the atomization bin, an opening is arranged at the bottom of the holding furnace, the smelting furnace and the holding furnace and the ladle are connected through a chute, and the chute is provided with a heating member. The atomizing bin is provided with a cooling water jacket. Further, the chute is a graphite chute.
As a further improvement of the invention, the outlet of the holding furnace is provided with a flow control mechanism.
Adopt this technical scheme, wherein the smelting furnace is used for smelting the metal, and the holding furnace is used for keeping warm to the metal melt, also can mix in this stove, the small bag is equipped with heating member, and the bottom of small bag leaves the small pipe and supplies the metal solution to flow into atomizing storehouse, the device all adopts the chute to connect, and the chute is equipped with heating member, and holding furnace and small bag are equipped with the flow control device respectively, have guaranteed the temperature of fuse-element to conveniently carry out flow control.
As a further improvement of the invention, the bottom of the heat preservation furnace is provided with a small hole with the diameter of 20mm, and the upper part of the heat preservation furnace is provided with a graphite conical head control rod for controlling the flow of the zinc alloy liquid to enter the leakage ladle.
As a further improvement of the invention, the powder collecting mechanism comprises a pneumatic or electric double-disc valve, and the double-disc valve is positioned at the bottom of the outer side of the atomizing bin. By adopting the technical scheme, the pneumatic or electric double-disc valve is adopted to control the blanking at the bottom of the atomization bin, so that the atmosphere environment in the atomization bin is not influenced.
As a further improvement of the invention, the driving mechanism comprises a motor and a lifting mechanism, a main shaft of the motor is connected with a connecting shaft, and the motor is connected with the centrifugal atomizing disk through the connecting shaft; the motor is connected with the lifting mechanism, and the distance between the centrifugal atomizing disk and the leakage packet is adjusted through the lifting mechanism.
As a further development of the invention, the centrifugal atomizing disk is provided with a heating member.
By adopting the technical scheme, the distance between the centrifugal atomizing disk and the leakage bag can be adjusted through the lifting mechanism, so that the use is more convenient.
As a further improvement of the invention, the conical bulge is provided with a platform, and the motor is connected with the centrifugal atomizing disk at the platform through a connecting shaft.
As a further improvement of the invention, the centrifugal atomizing disk is made of graphite or other materials which do not pollute the zinc liquid. Further preferably, the centrifugal atomizing disk is made of graphite.
The invention also discloses a centrifugal atomization preparation method of the zinc alloy, which adopts the centrifugal atomization preparation device of the metal alloy to prepare the zinc alloy, and comprises the following steps:
step S1, putting the zinc ingot into a smelting furnace, heating to melt, and keeping the temperature stable at 550-650 ℃; introducing nitrogen into the atomization bin;
and step S2, adding In, Bi, Al and Ca with set amounts into molten zinc, fully stirring, pouring into a heat preservation furnace, allowing the molten alloy to flow into a leaky ladle from the heat preservation furnace, allowing the centrifugal atomizing disk to have a distance of 50-100 mm from a bottom nozzle of the leaky ladle, controlling the zinc alloy solution In the leaky ladle to drip at the center of the centrifugal atomizing disk with the rotation speed of 10000-20000 revolutions per minute through the nozzle at the flow rate of 500-1500 kg/h, allowing the zinc alloy solution to diffuse to the edge of the centrifugal atomizing disk to form droplets, allowing the spheroidal zinc alloy droplets to form heat convection with surrounding nitrogen to rapidly cool and mold, allowing the spheroidal zinc alloy droplets to fall to the bottom of an atomizing bin, receiving materials through a material receiving mechanism, and grading to obtain zinc alloy powder.
As a further improvement of the present invention, the preparation method of the zinc alloy further comprises: according to the temperature change in the atomization bin, the mixing ratio of the circularly recovered nitrogen and the newly prepared nitrogen is adjusted, and the oxygen concentration and the zinc alloy temperature in the bin body are stabilized.
As a further improvement of the present invention, In the zinc alloy powder of step S2, the In, Bi, Al, and Ca contents by mass are respectively: in: 200-300ppm, Bi: 100-300ppm, Al: 0-100ppm, Ca: 0-150 ppm.
Compared with the prior art, the invention has the beneficial effects that:
by adopting the technical scheme of the invention, the double-cone atomization bin structure ensures that the motor is arranged outside the bin, the centrifugal atomization disc is convenient to replace, the motor is convenient to maintain, the environment in the bin is not damaged, further nitrogen in the bin can be recycled, the nitrogen consumption is low, the energy is saved, the consumption is reduced, and the production efficiency is high.
Drawings
Fig. 1 is a schematic structural diagram of a centrifugal atomization manufacturing device for metal alloy according to an embodiment of the invention.
FIG. 2 is an electron microscope image of a zinc alloy prepared according to an embodiment of the present invention.
The reference numerals include:
1-atomizing bin, 2-melting furnace, 3-holding furnace, 4-leakage ladle, 5-double butterfly valve, 6-motor, 7-lifting mechanism, 8-nitrogen circulating device, 9-nitrogen making machine, 10-nitrogen inlet, 11-nitrogen circulating outlet and 12-centrifugal atomizing disk.
Detailed Description
Preferred embodiments of the present invention are described in further detail below.
Example 1
As shown in fig. 1, a centrifugal atomization preparation device for metal alloy comprises an atomization bin 1, a metal smelting device and a nitrogen circulating device 8, wherein the atomization bin 1 is of a double-cone structure with a conical protruding part at the middle part of the bottom, a centrifugal atomization disc 12 is arranged above the conical protruding part, the atomization bin 1 is provided with a material leakage opening, the material leakage opening and the centrifugal atomization disc 12 are oppositely arranged, and an outlet of the metal smelting device is communicated with the material leakage opening; the centrifugal atomizing disk 12 is connected with a driving mechanism positioned outside the atomizing bin 1 through a connecting shaft, and the driving mechanism drives the centrifugal atomizing disk 12 to rotate; the atomization bin 1 is provided with a nitrogen inlet 10 for introducing nitrogen; and a powder collecting mechanism is arranged at the bottom of the double-cone structure. The atomization bin 1 is provided with a nitrogen circulating outlet 11, and the nitrogen circulating device 8 is respectively communicated with a nitrogen inlet 10 and the nitrogen circulating outlet 11. The nitrogen circulating device 8 is connected with a nitrogen preparation device. The material leakage port is provided with a leakage bag 4, the leakage bag 4 is provided with a heating member, the bottom of the leakage bag 4 is provided with a leakage nozzle, and the leakage bag 4 is connected with a flow control member of the leakage bag 4; and a nitrogen ring pipe is arranged around the leaky bag 4, is provided with an air outlet and is used for protecting the environment near the outlet of the leaky bag 4, and is connected with a nitrogen circulating device 8. Further, the nitrogen inlet 10 is communicated with the inlet of the nitrogen loop.
The metal smelting device is positioned above the atomization bin 1 and comprises a smelting furnace and a holding furnace 3. The smelting furnace and the holding furnace 3 are located above the atomization bin 1, the bottom of the holding furnace 3 is provided with an opening, the smelting furnace and the holding furnace 3 and the leaking bag 4 are connected through a chute, and the chute is provided with a heating member. And the heat preservation furnace 3 and the drain ladle 4 are both provided with flow control mechanisms. The atomization bin 1 is provided with a cooling water jacket.
Receive whitewashed mechanism and include pneumatics or electronic two butterfly valve 5, two butterfly valve 5 are located the outside bottom in atomizing storehouse 1. The driving mechanism comprises a motor 6 and a lifting mechanism 7, the conical boss is provided with a platform, a main shaft of the motor 6 is connected with a connecting shaft, and the motor 6 is connected with the centrifugal atomizing disk 12 at the platform through the connecting shaft; the motor 6 is connected with the lifting mechanism 7, and the distance between the centrifugal atomizing disk 12 and the drain ladle 4 is adjusted through the lifting mechanism 7; the centrifugal atomizing disk 12 is provided with heating means. Further, the centrifugal atomizing disk 12 is made of graphite.
Specifically, the double-cone structure atomization bin 1 is composed of a straight cylinder section and a cone section, and a leakage bag 4 is arranged at the top. The nitrogen ring pipe is arranged around the drain ladle 4, so that the nitrogen can be rapidly and uniformly distributed in the whole cabin body.
The metal smelting device above the atomization bin 1 is composed of a first-stage device, a second-stage device and a third-stage device. The melting furnace 2 is a first-level furnace, and adopts an intermediate frequency furnace to melt metal. The holding furnace 3 is a two-stage furnace, and a resistance furnace is adopted to heat the holding molten metal. The leaky ladle 4 is three-level, and the leaky ladle 4 is heated by adopting a resistance wire, a leaky pipe is reserved at the bottom of the leaky ladle 4 and is used for allowing molten metal to flow into the atomization bin 1, a graphite chute is adopted between the first level and the second level and between the second level and the third level and is connected with the graphite chute, the graphite chute is provided with a heating device, and the heat preservation furnace 3 of the second level and the leaky ladle 4 of the third level are respectively provided with a flow control mechanism. The flow control mechanism of the holding furnace 3 is a flow control rod.
The nitrogen circulating device 8 comprises a nitrogen conveying device and a nitrogen recovery device. The nitrogen conveying device is positioned right above the atomization bin 1 and distributed around the drain ladle 4 and arranged in a ring pipe, the nitrogen conveying is divided into two loops, and as shown in figure 1, S1 is high-purity nitrogen prepared by a nitrogen making machine 9 group; the S2 loop is used for recovering nitrogen in the bin body, the loop enters the nitrogen conveying pipeline through the three-way valve, and part of the loop is directly emptied through the emptying valve. The nitrogen recovery device ensures the circulation of nitrogen in the atomization bin 1, and the nitrogen is positioned above the straight plate of the cone section at the center of the atomization bin 1. The recovered nitrogen is adsorbed and dedusted, enters a nitrogen conveying pipeline S2, is fully mixed with high-purity nitrogen S1 supplemented by a nitrogen making system to form uniform nitrogen with certain oxygen content, and is conveyed into the atomizing bin 1, so that the uniformity of the oxygen content in the bin body is ensured.
The motor 6 is located at the middle platform of the conical protruding portion of the double cone, the motor 6 is arranged outside the atomizing bin 1 and connected with the centrifugal atomizing disk 12 through a connecting shaft, and the distance from the centrifugal atomizing disk 12 to the skip ladle 4 is adjusted through the lifting mechanism 7. The connecting shaft is also an extension transition shaft.
The double-cone bottom of the atomization bin 1 adopts an upper pneumatic or electric butterfly valve and a lower pneumatic or electric butterfly valve to control blanking to realize powder collection, so that the atmosphere environment in the bin body is not affected.
By adopting the technical scheme of the embodiment, the motor is arranged outside the bin, so that the atomizing disc is convenient to replace, the motor is convenient to maintain, the environment in the bin is not damaged, meanwhile, the device realizes full-closed circulation, nitrogen in the bin can be recycled, the consumed nitrogen amount is small, energy is saved, consumption is reduced, and the production efficiency is high; the method is suitable for producing the zinc alloy material for the cathode of the alkaline manganese battery with high specific capacity, high power and long service life.
Example 2
A method of making a zinc alloy powder using the apparatus of example 1, comprising the steps of:
(1) zinc ingot smelting
Firstly, a certain amount of zinc ingots are put into a first-stage intermediate frequency furnace, heated and melted, and the temperature is kept stable at 550-650 ℃.
(2) Alloying of zinc
Adding a certain amount of In, Bi, Al and Ca (according to the mass ratio of zinc ingots, the preferable amount is 300ppm of In: 200-. The bottom of the holding furnace is provided with a small hole with the diameter of 20mm, and the upper part of the holding furnace is provided with a graphite conical head control rod for controlling the flow of the zinc alloy liquid to enter the small leakage ladle.
(3) Centrifugal atomization forming
And conveying the zinc alloy liquid in the secondary heat-preserving furnace ladle into a leaky ladle through a chute, wherein the bottom of the leaky ladle is connected with a leaky pipe, and a graphite conical head flow control rod is arranged on the leaky pipe. Firstly, newly-made nitrogen with a certain oxygen content (preferably 3-5 vol%) in a bin body is fully prepared, circulation of internal and external nitrogen is realized, after the oxygen content in the bin body reaches the required production condition, the centrifugal atomizing disk 12 is controlled to be 50-100 mm away from a bottom discharge spout of a leakage bag, zinc alloy solution in the leakage bag is directly dripped to the center of the centrifugal atomizing disk 12 with the diameter of phi 100-200 mm at the rotating speed of 10000-20000 revolutions per minute at the flow rate of 500-1500 kg/h through the bottom discharge spout with the diameter of phi 5-9 mm, then the zinc alloy solution is diffused to the edge of the centrifugal atomizing disk 12 to form sphere-like droplets, the atomizing bin is provided with a cooling water jacket, the sphere-like droplets and surrounding nitrogen are rapidly cooled and formed by convection, at the moment, the mixing ratio of recycled nitrogen and newly-made nitrogen is adjusted according to the temperature change in the atomizing bin body, the oxygen concentration and the zinc alloy temperature in the bin body are stabilized, and finally, two butterfly valves which are alternately opened are used for receiving materials, and grading to obtain the zinc alloy for the battery.
The following description is given with reference to specific examples.
Oxygen concentration in the preparation bin: closing all outlet valves in the atomization bin, opening an air compressor nitrogen making unit, setting the oxygen concentration to be 3%, introducing nitrogen gas containing 3% of oxygen into the atomization bin, opening a nitrogen gas circulating valve in the bin after the bin is filled with the nitrogen gas, and adjusting the recycle amount and the evacuation amount ratio of the nitrogen gas to stabilize the oxygen concentration in the bin to be 3%.
Preparing alloy zinc liquid: and adding 1000kg of weighed qualified zinc ingots into a primary smelting furnace, heating to melt, and maintaining the temperature of zinc liquid at 500 ℃. Adding 250g of In and 250g of Bi into the zinc liquid according to the weight of the zinc ingot, and fully stirring to form the alloy zinc liquid. And pouring the alloy zinc liquid into a secondary heat preservation furnace to ensure that the temperature of the zinc liquid in the secondary heat preservation furnace is stabilized at 500 ℃.
Step 2: the motor is connected with a graphite centrifugal atomizing disk with the diameter of 100mm, the motor is started, the rotating speed is 20000r/min, and the distance from the leakage packet to the centrifugal atomizing disk is controlled to be 50 mm.
And step 3: and opening a flow control rod of the secondary heat preservation furnace to enable the alloy zinc liquid to flow into a tertiary leaky ladle, wherein the diameter of a leaky pipe used for the leaky ladle is 7 mm. And controlling a flow control rod in the small leaky ladle, slowly opening the flow control rod to enable the alloy zinc liquid to enter a bin and drop onto an atomizing disc rotating at a high speed, centrifugally atomizing the alloy zinc liquid at a high speed to form fine particle zinc alloy, and alternately discharging and collecting the obtained battery zinc alloy material through a discharging opening.
The components and particle size distribution of the zinc alloy obtained in this example are shown in tables 1 and 2 below, and the SEM image is shown in fig. 2.
TABLE 1 Zinc alloy compositions
TABLE 2 apparent density and particle size distribution
As can be seen from the data in the table and the SEM image in FIG. 2, the zinc alloy powder prepared by the embodiment has less impurity components and uniform particle size distribution.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A centrifugal atomization preparation device of metal alloy is characterized in that: the metal smelting device comprises an atomizing bin and a metal smelting device, wherein the atomizing bin is of a double-cone structure, the middle part of the bottom of the atomizing bin is provided with a conical protruding part, a centrifugal atomizing disc is arranged above the conical protruding part, the atomizing bin is provided with a material leakage opening, the material leakage opening is opposite to the centrifugal atomizing disc, and an outlet of the metal smelting device is communicated with the material leakage opening; the centrifugal atomizing disk is connected with a driving mechanism positioned outside the atomizing bin through a connecting shaft, and the driving mechanism drives the centrifugal atomizing disk to rotate;
the atomization bin is provided with a protective gas inlet for introducing protective gas;
and a powder collecting mechanism is arranged at the bottom of the double-cone structure.
2. The centrifugal atomization production apparatus for metal alloy according to claim 1, characterized in that: the atomization device comprises a protective gas circulating device, wherein a protective gas circulating outlet is formed in the atomization bin, and the protective gas circulating device is communicated with a protective gas inlet and a protective gas circulating outlet respectively.
3. The centrifugal atomization production apparatus for metal alloy according to claim 2, characterized in that: and the protective gas circulating device is connected with the protective gas preparation device.
4. The centrifugal atomization production apparatus for metal alloy according to claim 1, characterized in that: the drain hole is provided with a drain packet, the drain packet is provided with a heating member, the bottom of the drain packet is provided with a drain nozzle, and the drain packet is connected with a drain packet flow control member;
and a protective gas ring pipe is arranged around the drain bag, is provided with a gas outlet and is connected with a protective gas circulating device.
5. The centrifugal atomization production apparatus for metal alloy according to claim 4, characterized in that: the atomizing bin is characterized in that a smelting furnace and a holding furnace are arranged above the atomizing bin, an opening is formed in the bottom of the holding furnace, the smelting furnace and the holding furnace are connected through a chute, the holding furnace and a leakage bag are connected through a chute, and the chute is provided with a heating component.
6. The centrifugal atomization production apparatus for metal alloy according to claim 5, characterized in that: and a flow control mechanism is arranged at the outlet of the heat preservation furnace.
7. The centrifugal atomization production apparatus for metal alloy according to claim 6, characterized in that: the powder collecting mechanism comprises a pneumatic or electric double-disc valve, and the double-disc valve is positioned at the bottom of the outer side of the atomization bin.
8. The centrifugal atomization production apparatus for metal alloy according to claim 7, characterized in that: the driving mechanism comprises a motor and a lifting mechanism, a main shaft of the motor is connected with a connecting shaft, and the motor is connected with the centrifugal atomizing disk through the connecting shaft;
the motor is connected with the lifting mechanism, and the distance between the centrifugal atomizing disc and the leakage packet is adjusted through the lifting mechanism;
the centrifugal atomizing disk is provided with a heating member.
9. A preparation method of zinc alloy is characterized by comprising the following steps: the centrifugal atomization preparation device for the metal alloy as claimed in claim 8 is used for preparing the centrifugal atomization preparation device, and comprises the following steps:
step S1, putting the zinc ingot into a smelting furnace, heating to melt, keeping the temperature stable at 550-650 ℃, and introducing nitrogen into an atomization bin;
and step S2, adding In, Bi, Al and Ca with set amounts into molten zinc, fully stirring, pouring into a heat preservation furnace, allowing the molten alloy to flow into a leaky ladle from the heat preservation furnace, controlling the distance between a centrifugal atomizing disc and a bottom nozzle of the leaky ladle to be 50-100 mm, dropping the zinc alloy solution In the leaky ladle to the center of the centrifugal atomizing disc with the rotating speed of 10000-20000 revolutions per minute at the flow rate of 500-1500 kg/h through the nozzle, diffusing the zinc alloy solution to the edge of the centrifugal atomizing disc to form droplets, forming heat convection between the droplets and surrounding nitrogen to rapidly cool and mold, allowing the droplets to fall to the bottom of an atomizing bin, receiving materials through a material receiving mechanism, and grading to obtain zinc alloy powder.
10. The method for producing a zinc alloy according to claim 9, characterized in that: further comprising:
according to the temperature change in the atomization bin, the mixing ratio of the circularly recovered nitrogen and the newly prepared nitrogen is adjusted, and the oxygen concentration and the zinc alloy temperature in the bin body are stabilized.
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| CN115570142A (en) * | 2022-10-24 | 2023-01-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-aluminum alloy melt treatment system and use method |
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| CN106862578A (en) * | 2017-02-13 | 2017-06-20 | 连云港倍特超微粉有限公司 | It is a kind of to combine the apparatus and method that atomization type prepares spherical metal alloy powder |
| RU2742125C1 (en) * | 2020-02-19 | 2021-02-02 | Акционерное общество "Высокотехнологический научно-исследовательский институт неорганических материалов имени академика А.А. Бочвара" | Device for production of metal powders by centrifugal spraying method |
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| CN115570142A (en) * | 2022-10-24 | 2023-01-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-aluminum alloy melt treatment system and use method |
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