CN111235398A - Distillation plant is used in high-purity zinc production - Google Patents
Distillation plant is used in high-purity zinc production Download PDFInfo
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- CN111235398A CN111235398A CN202010176381.4A CN202010176381A CN111235398A CN 111235398 A CN111235398 A CN 111235398A CN 202010176381 A CN202010176381 A CN 202010176381A CN 111235398 A CN111235398 A CN 111235398A
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- Prior art keywords
- reflux
- graphite crucible
- zinc
- medium
- condenser pipe
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 57
- 239000011701 zinc Substances 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000004821 distillation Methods 0.000 title claims abstract description 17
- 238000010992 reflux Methods 0.000 claims abstract description 73
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 62
- 239000010439 graphite Substances 0.000 claims abstract description 62
- 230000006698 induction Effects 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000007770 graphite material Substances 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000010924 continuous production Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000007712 rapid solidification Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/04—Obtaining zinc by distilling
-
- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/003—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals by induction
-
- 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
- Y02P10/20—Recycling
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a distillation device for producing high-purity zinc, which comprises a medium-frequency induction furnace, a graphite crucible, an upper cover of the graphite crucible, a multi-stage reflux tray, a reflux tray bracket, a condenser pipe and a material receiving tank, wherein the reflux tray bracket is arranged between two upper and lower adjacent reflux trays, and separates the two reflux trays so as to be beneficial to refluxing heated zinc steam into the graphite crucible step by step; a through hole is arranged on one side of the upper cover of the graphite crucible, the inner end of the condenser pipe horizontally extends into the graphite crucible so as to guide the zinc vapor out of the graphite crucible, and the outer end of the condenser pipe extends out of the graphite crucible; the material receiving tank is positioned right below the outlet of the outer end of the condensing pipe to receive high-temperature high-purity zinc liquid which is condensed and falls from the outer end opening of the condensing pipe. The invention has the advantages of high melting speed, high production efficiency, strong adaptability, flexible use, good electromagnetic stirring effect, convenient starting operation and high zinc block purity, and has good market prospect and development space for the prior art.
Description
Technical Field
The invention relates to the technical field of high-purity metal production equipment, in particular to a distillation device for producing high-purity zinc.
Background
The high-purity zinc refers to a high-purity zinc block with the zinc content of 99.999% -99.9999%, and the high-purity zinc block is mainly used for preparing compound semiconductor materials, reducing agents, electronic industry and the like.
The existing high-purity zinc production adopts a distillation method in which a conventional resistance wire is directly heated in a heating furnace body, so that during production, many air holes exist, slag is contained in the interior, many pollutants exist, the purity is reduced, the hole shrinkage is deep, the yield is low, even the product purity and the structure are unqualified, and continuous production cannot be realized; on the other hand, many companies are reluctant to spend enormous capital to purchase new equipment for production because of the small market demand of high purity zinc ingots.
How to design a distillation furnace for producing high-purity zinc with ingenious design, reasonable and feasible method, high melting speed, high production efficiency, strong adaptability, flexible use, good electromagnetic stirring effect, convenient starting operation and high zinc block purity is a problem which needs to be solved at present.
Disclosure of Invention
The method aims to solve the problems that the conventional resistance wire is directly heated in a heating furnace body for distillation in the existing high-purity zinc production, so that the production has the defects of more air holes, slag inclusion in the interior, more pollutants, low purity, deep shrinkage, low yield, even unqualified product purity and structure, and incapability of continuous production; on the other hand, because the market demand of the high-purity zinc ingot is small, many companies are reluctant to spend huge resources on purchasing new equipment for production, and the technical problems of influencing the product quality, the enterprise production benefit and the like are solved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a distillation device for producing high-purity zinc comprises a medium-frequency induction furnace, a graphite crucible upper cover, a multi-stage reflux tray, reflux tray supports, a condenser pipe and a material receiving tank, wherein the graphite crucible is of a cylindrical structure, a zinc ingot to be heated is placed at the bottom of the graphite crucible, the multi-stage reflux tray is positioned right above the zinc ingot, the reflux tray supports are installed between two upper reflux trays and two lower reflux trays which are adjacent, the reflux tray supports separate the two reflux trays, the edge of the multi-stage reflux tray is arranged in a downward inclined mode, and the multi-stage reflux tray and the graphite crucible form a zinc steam reflux circulation channel so as to reflux heated zinc steam into the graphite crucible step by step; a through hole is formed in one side of the upper cover of the graphite crucible, the inner end of the condensing tube horizontally extends into the graphite crucible so as to guide zinc vapor out of the graphite crucible, and the outer end of the condensing tube extends out of the graphite crucible; the material receiving tank is positioned under the outlet of the outer end of the condensing pipe to receive high-temperature high-purity zinc liquid which is condensed and falls from the outer port of the condensing pipe.
The medium-frequency induction furnace is internally provided with a medium-frequency induction coil spirally surrounding a crucible body of the graphite crucible, and the medium-frequency induction coil utilizes a medium-frequency power supply to establish a medium-frequency magnetic field so as to generate induction eddy current inside the zinc ingot and perform concurrent heating and melting.
The medium-frequency induction furnace adopts a medium-frequency power supply of 200-2500Hz for induction heating.
The multistage reflux disc and the reflux disc support are made of graphite materials, and through holes convenient for zinc steam to pass through are formed in the disc surface of the multistage reflux disc.
The number of stages of the multi-stage reflux disc is four to six.
The condenser pipe adopts the graphite condenser pipe, and the outside parcel of pipe wall of condenser pipe has the heater, prevents that high temperature zinc steam from meeting cold rapid solidification caking.
The heating temperature of the heater is higher than 420 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention comprises a medium-frequency induction furnace, a graphite crucible upper cover, a multi-stage reflux tray, reflux tray supports, a condenser pipe and a material receiving tank, wherein the graphite crucible is of a cylindrical structure, a zinc ingot to be heated is placed at the bottom of the graphite crucible, the multi-stage reflux tray is positioned right above the zinc ingot, the reflux tray supports are arranged between two upper reflux trays and two lower reflux trays which are adjacent, the reflux tray supports separate the two reflux trays, the edge of the multi-stage reflux tray is arranged in a downward inclined manner, and the multi-stage reflux tray and the graphite crucible form a zinc steam reflux circulation channel so as to reflux heated zinc steam into the graphite crucible step by step;
2) a through hole is formed in one side of the upper cover of the graphite crucible, the inner end of the condensing tube horizontally extends into the graphite crucible so as to guide zinc vapor out of the graphite crucible, and the outer end of the condensing tube extends out of the graphite crucible; the material receiving tank is positioned right below the outer end outlet of the condensing pipe to receive high-temperature high-purity zinc liquid condensed and dropped from the outer end opening of the condensing pipe;
3) a medium-frequency induction coil spirally surrounding the crucible body of the graphite crucible is arranged in the medium-frequency induction furnace, and the medium-frequency induction coil utilizes a medium-frequency power supply to establish a medium-frequency magnetic field so as to generate induction eddy current and heat and melt the zinc ingot;
4) the multistage reflux disc and the reflux disc bracket are both made of graphite materials, and the disc surface of the multistage reflux disc is provided with a through hole for zinc steam to pass through;
5) the condenser pipe adopts the graphite condenser pipe, and the outside parcel of pipe wall of condenser pipe has the heater, prevents that high temperature zinc steam from meeting cold rapid solidification caking.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic view of a multi-stage reflow tray configuration of the present invention;
FIG. 3 is a schematic view of a zinc vapor recirculation circuit;
the labels in the figure are: 1. the device comprises a medium-frequency induction furnace, 2, a graphite crucible, 3, a graphite crucible upper cover, 4, a multi-stage reflux tray, 5, a reflux tray support, 6, a condensation pipe, 7, a material receiving tank, 8, a medium-frequency induction coil, 9, a heater, 10, zinc liquid, 11 and a through hole.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in the figure, the distillation device for producing high-purity zinc comprises a medium-frequency induction furnace 1, a graphite crucible 2, a graphite crucible upper cover 3, a multi-stage reflux tray 4, a reflux tray support 5, a condenser pipe 6 and a material receiving tank 7, wherein the graphite crucible 2 is of a cylindrical structure, a zinc ingot to be heated is placed at the bottom of the graphite crucible 2, the multi-stage reflux tray 4 is positioned right above the zinc ingot, the reflux tray support 5 is installed between two upper and lower adjacent reflux trays, the two reflux trays are separated by the reflux tray support 5, the edge of the multi-stage reflux tray 4 is arranged in a downward inclination manner, and the multi-stage reflux tray 4 and the graphite crucible 2 form a zinc vapor reflux circulation channel so as to reflux the heated zinc vapor into the graphite crucible 2 step by step; a through hole is formed in one side of the graphite crucible upper cover 3, the inner end of the condenser pipe 6 horizontally extends into the graphite crucible 2 so as to guide zinc vapor out of the graphite crucible 2, and the outer end of the condenser pipe 6 extends out of the graphite crucible 2; and the material receiving tank 7 is positioned under the outlet of the outer end of the condensing pipe 6 to receive high-temperature high-purity zinc liquid which is condensed and falls from the outer port of the condensing pipe 6.
The above is the basic implementation mode of the invention, and further improvement, perfection and limitation can be made on the basis of the above: if the intermediate frequency induction furnace 1 is internally provided with the intermediate frequency induction coil 8 spirally surrounding the crucible body of the graphite crucible 2, the intermediate frequency induction coil 8 utilizes an intermediate frequency power supply to establish an intermediate frequency magnetic field, so that induction eddy current is generated inside a zinc ingot and heat is fused.
The above is the basic implementation mode of the invention, and further improvement, perfection and limitation can be made on the basis of the above: the medium frequency induction furnace 1 adopts a medium frequency power supply of 200-2500Hz for induction heating.
The above is the basic implementation mode of the invention, and further improvement, perfection and limitation can be made on the basis of the above: if the multistage reflux disc 4 and the reflux disc bracket 5 are both made of graphite materials, and the disc surface of the multistage reflux disc 4 is provided with a through hole for zinc steam to pass through.
The above is the basic implementation mode of the invention, and further improvement, perfection and limitation can be made on the basis of the above: the number of stages of the multistage return tray 4 is four to six as described.
The above is the basic implementation mode of the invention, and further improvement, perfection and limitation can be made on the basis of the above: if the condenser pipe 6 adopts a graphite condenser pipe, the heater 9 is wrapped on the outer part of the pipe wall of the condenser pipe 6, and the high-temperature zinc steam is prevented from being rapidly solidified and agglomerated when being cooled.
The above is the basic implementation mode of the invention, and further improvement, perfection and limitation can be made on the basis of the above: the heating temperature of the heater 9 is higher than 420 c.
In actual operation, a zinc ingot to be heated is placed at the bottom of a graphite crucible 2, a medium-frequency induction coil 8 spirally surrounding a crucible body of the graphite crucible 2 is arranged in a medium-frequency induction furnace 1, the medium-frequency induction coil 8 utilizes a medium-frequency power supply to establish a medium-frequency magnetic field, so that induced eddy current is generated in the zinc ingot and the zinc ingot is heated and melted, a multi-stage reflux tray 4 is positioned right above the zinc ingot, a reflux tray support 5 is arranged between two vertically adjacent reflux trays, and the reflux tray support 5 separates the two reflux trays, so that the heated zinc steam can be conveniently refluxed into the graphite crucible 2 step by step; a through hole is formed in one side of the graphite crucible upper cover 3, the inner end of the condenser pipe 6 horizontally extends into the graphite crucible 2 so as to guide zinc vapor out of the graphite crucible 2, and the outer end of the condenser pipe 6 extends out of the graphite crucible 2; and the material receiving tank 7 is positioned under the outlet of the outer end of the condensing pipe 6 to receive high-temperature high-purity zinc liquid which is condensed and falls from the outer port of the condensing pipe 6.
The invention has the advantages of ingenious design, reasonable and feasible method, high melting speed, high production efficiency, strong adaptability, flexible use, good electromagnetic stirring effect, convenient starting operation and high zinc block purity, and solves the problems that the conventional high-purity zinc production adopts a distillation method in which a conventional resistance wire is directly heated in a heating furnace body, so that the production has many air holes, slag is included in the interior, more pollutants are contained, the purity is reduced, the shrinkage is deep, the yield is low, even the product purity and the structure are unqualified, and continuous production cannot be realized; on the other hand, as the market demand of the high-purity zinc ingot is small, many companies are reluctant to spend huge resources on purchasing new equipment for production, and the technical problems of influencing the product quality, the production benefits of enterprises and the like are solved.
The preferred embodiments and examples of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments and examples described above, and various changes can be made within the knowledge of those skilled in the art without departing from the concept of the present invention.
Claims (7)
1. The utility model provides a distillation plant is used in high-purity zinc production which characterized in that: the device comprises an intermediate frequency induction furnace (1), a graphite crucible (2), a graphite crucible upper cover (3), a multi-stage reflux tray (4), a reflux tray support (5), a condenser pipe (6) and a material receiving tank (7), wherein the graphite crucible (2) is of a cylindrical structure, a zinc ingot to be heated is placed at the bottom of the graphite crucible (2), the multi-stage reflux tray (4) is positioned right above the zinc ingot, the reflux tray support (5) is arranged between two vertically adjacent reflux trays, the two reflux trays are separated by the reflux tray support (5), the edge of the multi-stage reflux tray (4) is obliquely arranged downwards, and the multi-stage reflux tray (4) and the graphite crucible (2) form a zinc vapor reflux circulation channel so as to reflux the heated zinc vapor into the graphite crucible (2) step by step; a through hole is formed in one side of the graphite crucible upper cover (3), the inner end of the condenser pipe (6) horizontally extends into the graphite crucible (2) so as to guide zinc vapor out of the graphite crucible (2), and the outer end of the condenser pipe (6) extends out of the graphite crucible (2); the material receiving tank (7) is positioned under the outlet of the outer end of the condensing pipe (6) to receive high-temperature high-purity zinc liquid which is condensed and falls from the outer end opening of the condensing pipe (6).
2. The distillation apparatus for producing high purity zinc according to claim 1, wherein: the medium-frequency induction furnace is characterized in that a medium-frequency induction coil (8) spirally surrounding the crucible body of the graphite crucible (2) is arranged in the medium-frequency induction furnace (1), and the medium-frequency induction coil (8) utilizes a medium-frequency power supply to establish a medium-frequency magnetic field, so that induced eddy current is generated inside a zinc ingot and the zinc ingot is heated and melted.
3. The distillation apparatus for producing high purity zinc according to claim 1, wherein: the medium-frequency induction furnace (1) adopts a medium-frequency power supply of 200-2500Hz for induction heating.
4. The distillation apparatus for producing high purity zinc according to claim 1, wherein: the multi-stage reflux disc (4) and the reflux disc support (5) are made of graphite materials, and a through hole (11) which is convenient for zinc steam to pass through is formed in the disc surface of the multi-stage reflux disc (4).
5. The distillation apparatus for producing high purity zinc according to claim 4, wherein: the number of stages of the multi-stage reflux disc (4) is four to six.
6. The distillation apparatus for producing high purity zinc according to claim 1, wherein: the condenser pipe (6) adopts a graphite condenser pipe, and the pipe wall of the condenser pipe (6) is externally wrapped with a heater (9) to prevent high-temperature zinc steam from rapidly solidifying and caking when cooled.
7. The distillation apparatus for producing high purity zinc according to claim 1, wherein: the heating temperature of the heater (9) is higher than 420 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010176381.4A CN111235398A (en) | 2020-03-13 | 2020-03-13 | Distillation plant is used in high-purity zinc production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010176381.4A CN111235398A (en) | 2020-03-13 | 2020-03-13 | Distillation plant is used in high-purity zinc production |
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| Publication Number | Publication Date |
|---|---|
| CN111235398A true CN111235398A (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010176381.4A Pending CN111235398A (en) | 2020-03-13 | 2020-03-13 | Distillation plant is used in high-purity zinc production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649531A (en) * | 2021-08-16 | 2021-11-16 | 江西中晶新材料有限公司 | Production method of 5N zinc ingot |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3188702A (en) * | 1959-09-21 | 1965-06-15 | Atomic Energy Authority Uk | Apparatus for vacuum melting and casting metals |
| CN101062764A (en) * | 2006-04-29 | 2007-10-31 | 成都汉普高新材料有限公司 | Tellurium retort |
| CN102605194A (en) * | 2012-03-16 | 2012-07-25 | 葫芦岛锌业股份有限公司 | Preparation method of high purity zinc by vacuum distillation |
| CN203639529U (en) * | 2013-12-11 | 2014-06-11 | 湖南稀土金属材料研究院 | Rare earth distillation and purification device |
| CN206345893U (en) * | 2016-12-20 | 2017-07-21 | 乐山凯亚达光电科技有限公司 | A kind of high pure metal vacuum distillation plant |
| CN108570564A (en) * | 2018-07-09 | 2018-09-25 | 长沙科力威蒸馏技术有限公司 | A kind of vacuum distillation furnace |
| CN211999859U (en) * | 2020-03-13 | 2020-11-24 | 河南国玺超纯新材料股份有限公司 | Distillation plant is used in high-purity zinc production |
-
2020
- 2020-03-13 CN CN202010176381.4A patent/CN111235398A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3188702A (en) * | 1959-09-21 | 1965-06-15 | Atomic Energy Authority Uk | Apparatus for vacuum melting and casting metals |
| CN101062764A (en) * | 2006-04-29 | 2007-10-31 | 成都汉普高新材料有限公司 | Tellurium retort |
| CN102605194A (en) * | 2012-03-16 | 2012-07-25 | 葫芦岛锌业股份有限公司 | Preparation method of high purity zinc by vacuum distillation |
| CN203639529U (en) * | 2013-12-11 | 2014-06-11 | 湖南稀土金属材料研究院 | Rare earth distillation and purification device |
| CN206345893U (en) * | 2016-12-20 | 2017-07-21 | 乐山凯亚达光电科技有限公司 | A kind of high pure metal vacuum distillation plant |
| CN108570564A (en) * | 2018-07-09 | 2018-09-25 | 长沙科力威蒸馏技术有限公司 | A kind of vacuum distillation furnace |
| CN211999859U (en) * | 2020-03-13 | 2020-11-24 | 河南国玺超纯新材料股份有限公司 | Distillation plant is used in high-purity zinc production |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649531A (en) * | 2021-08-16 | 2021-11-16 | 江西中晶新材料有限公司 | Production method of 5N zinc ingot |
| CN113649531B (en) * | 2021-08-16 | 2023-07-14 | 江西中晶新材料有限公司 | Production method of 5N zinc ingot |
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