CN105328201A - Superfine zinc powder preparation method - Google Patents
Superfine zinc powder preparation method Download PDFInfo
- Publication number
- CN105328201A CN105328201A CN201410383995.4A CN201410383995A CN105328201A CN 105328201 A CN105328201 A CN 105328201A CN 201410383995 A CN201410383995 A CN 201410383995A CN 105328201 A CN105328201 A CN 105328201A
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- China
- Prior art keywords
- zinc
- zinc powder
- classification
- condensation
- preparation
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 53
- 239000011701 zinc Substances 0.000 claims abstract description 53
- 238000009833 condensation Methods 0.000 claims abstract description 27
- 230000005494 condensation Effects 0.000 claims abstract description 27
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 19
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000008018 melting Effects 0.000 claims abstract description 14
- 238000002844 melting Methods 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 24
- 239000003517 fume Substances 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000003723 Smelting Methods 0.000 claims description 6
- 230000006837 decompression Effects 0.000 claims description 6
- 239000000446 fuel Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 6
- 238000001291 vacuum drying Methods 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000007499 fusion processing Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000004821 distillation Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a superfine zinc powder preparing method. The method includes the steps of melting, liguation, cadmium removal, lead removal, distillation, condensation, grading and the like. The overall process steps are conducted in an airtight condition, wherein melting, liguation and distillation are conducted under the vacuum negative pressure and condensation is conducted in a circulating pressure increase/reduction condensation bin. By means of the superfine zinc powder preparation method, energy consumption is less, and the prepared superfine zinc powder is small in grain size, high in total zinc amount and high in activity.
Description
Technical field
The present invention relates to nonferrous metallurgy chemical engineering industry technical field, be specially a kind of preparation method of super-fine zinc dust.
Background technology
Super-fine zinc dust, because having unique physics and chemistry character, is widely used in the aspects such as battery, catalyst, lubriation material, the ultra-fine automobile finish of high-performance metal, inorganic antibacterial material and nanocomposite additives.Though super-fine zinc dust price is high, service efficiency is high, and little consumption just can reach the requirement of zinc rich primer Corrosion Protection.The chemical reactivity of super-fine zinc dust is high, strong as reproducibility during reducing agent, be swift in response, reduction efficiency is high, the metallic obtained when preparing submicron metal with its displacement metal salt solution is thinner, and it is also less to consume zinc powder amount.
Super-fine zinc dust is of many uses, wide market, the huge market demand.At present, the production of super-fine zinc dust generally adopts the normal pressure volatilization condensation method of metallic zinc, gained zinc powder particle mean size is close to 30 μm, less than 10 μm then little, production process energy consumption is large, coal contaminated environment is serious, and production technology is in a kind of environment of opposing open, and the dust of zinc powder not only affects health but also the contaminated environment of employee.
Summary of the invention
In order to overcome the above-mentioned technical problem existed in prior art, the invention provides a kind of strong adaptability to raw material, energy consumption is lower, and product quality is higher, the better super-fine zinc dust preparation method of operative's environment.
Super-fine zinc dust preparation method of the present invention, comprises the following steps
(1) melt: crude zinc ingot is placed in melting furnace, is heated to 460-580
oc, is fused into crude zinc liquid;
(2) liquate: gained crude zinc liquid is transferred in liquation hearth, carries out liquate removal of impurities, preliminary removal lead and iron tramp;
(3) except cadmium and deleading: be transferred in tower type zinc powder smelting furnace by the zinc liquid after preliminary removal of impurities, cadmium and plumbous impurity is removed successively;
(4) distill: the zinc liquid removing cadmium and plumbous impurity is transferred in vacuum drying oven, is heated to 600-800
oc, obtains zinc fume;
(5) condensation: zinc fume is passed into condensation bin, under inert gas shielding, condensation obtains former zinc powder;
(6) classification: in confined conditions, is delivered to classification workshop by the former zinc powder of gained, carries out Accurate Classification by air current classifying technique to former zinc powder, obtain the super-fine zinc dust of different size, and the zinc granule produced after classification melts again to be made zinc ingot metal and add melting furnace;
Above-mentioned steps (1), (2) and (4) are all carry out under the subnormal ambient of 41230-54530Pa in vacuum.
Preferably, in described fusion process using natural gas as fuel.
Preferably, described inert gas is nitrogen.
Preferably, in described condensation process, zinc fume is passed into circulation and add decompression condensation bin, utilize inert nitrogen gas to carry out pressurizeing and reduced pressure treatment.
Preferably, described classification process Central Plains zinc powder is delivered to classification workshop by zinc powder collecting conveying equipment.
Following table is that the technical indicator of the zinc powder that zinc powder prepared by technique of the present invention is prepared with general technology compares.
| Technical indicator | Technique of the present invention | General technology |
| Total zinc | ≥99.5% | 92% |
| Metallic zinc | ≥98% | 85% |
| Maximum particle diameter | ≯10μm | >30μm |
| Particle mean size | 1-2μm | 4μm |
| Environmental protection index | Energy consumption reduces 10-20%, and whole technical process sealing is produced, and pollutes without zinc fume | High energy consumption, dust pollution |
Super-fine zinc dust preparation method of the present invention, fusing, liquate and distillation three steps are all carried out under negative pressure of vacuum environment, reduce technological temperature, have saved the energy, and effectively ensure that zinc powder particle size reaches requirement.Whole technical process is all carried out under closed environment, utilizes inert nitrogen gas to carry out pressurizeing and reduced pressure treatment, prevents the oxidation of zinc particle, prevent zinc powder dirt to the pollution of environment simultaneously, and the injury to enterprise employee health.Utilize zinc fume under elevated pressure freezing point rise and reach the object of condensation, utilize strong convection cold air during nitrogen pressurization, stop zinc particle cohesion, fine powder rate reaches more than 95% simultaneously.
Accompanying drawing explanation
Fig. 1 is production technological process 1 of the present invention
Fig. 2 is production technological process 2 of the present invention
embodiment
Below in conjunction with accompanying drawing, brief description is made to the specific embodiment of the present invention.
embodiment 1
Super-fine zinc dust preparation method of the present invention, comprises the following steps
(1) melt: under the condition of negative pressure of 41230Pa, crude zinc ingot is placed in melting furnace, using natural gas as fuel, is heated to 460
oc, is fused into crude zinc liquid;
(2) liquate: under the condition of negative pressure of 41230Pa, is transferred in liquation hearth by gained crude zinc liquid, carries out liquate removal of impurities, preliminary removal lead and iron tramp;
(3) except cadmium and deleading: be transferred in tower type zinc powder smelting furnace by the zinc liquid after preliminary removal of impurities, cadmium and plumbous impurity is removed successively;
(4) distill: under the condition of negative pressure of 41230Pa, the zinc liquid removing cadmium and plumbous impurity is transferred in vacuum drying oven, is heated to 600
oc, obtains zinc fume;
(5) condensation: zinc fume is passed into circulation and add decompression condensation bin, utilize inert nitrogen gas to carry out pressurizeing and reduced pressure treatment, condensation obtains former zinc powder;
(6) classification: in confined conditions, former zinc powder is delivered to classification workshop by zinc powder collecting conveying equipment, carry out Accurate Classification by air current classifying technique to former zinc powder, obtain the super-fine zinc dust of different size, the zinc granule produced after classification melts again to be made zinc ingot metal and adds melting furnace.
embodiment 2
Super-fine zinc dust preparation method of the present invention, comprises the following steps
(1) melt: under the condition of negative pressure of 54530Pa, crude zinc ingot is placed in melting furnace, using natural gas as fuel, is heated to 580
oc, is fused into crude zinc liquid;
(2) liquate: under the condition of negative pressure of 54530Pa, is transferred in liquation hearth by gained crude zinc liquid, carries out liquate removal of impurities, preliminary removal lead and iron tramp;
(3) except cadmium and deleading: be transferred in tower type zinc powder smelting furnace by the zinc liquid after preliminary removal of impurities, cadmium and plumbous impurity is removed successively;
(4) distill: under the condition of negative pressure of 54530Pa, the zinc liquid removing cadmium and plumbous impurity is transferred in vacuum drying oven, is heated to 800
oc, obtains zinc fume;
(5) condensation: zinc fume is passed into circulation and add decompression condensation bin, utilize inert nitrogen gas to carry out pressurizeing and reduced pressure treatment, condensation obtains former zinc powder;
(6) classification: in confined conditions, former zinc powder is delivered to classification workshop by zinc powder collecting conveying equipment, carry out Accurate Classification by air current classifying technique to former zinc powder, obtain the super-fine zinc dust of different size, the zinc granule produced after classification melts again to be made zinc ingot metal and adds melting furnace.
embodiment 3
Super-fine zinc dust preparation method of the present invention, comprises the following steps
(1) melt: under the condition of negative pressure of 41230Pa, crude zinc ingot is placed in melting furnace, using natural gas as fuel, is heated to 460
oc, is fused into crude zinc liquid;
(2) liquate: under the condition of negative pressure of 41230Pa, is transferred in liquation hearth by gained crude zinc liquid, carries out liquate removal of impurities, preliminary removal lead and iron tramp;
(3) except cadmium and deleading: be transferred in tower type zinc powder smelting furnace by the zinc liquid after preliminary removal of impurities, cadmium and plumbous impurity is removed successively;
(4) distill: under the condition of negative pressure of 41230Pa, the zinc liquid removing cadmium and plumbous impurity is transferred in vacuum drying oven, is heated to 800
oc, obtains zinc fume;
(5) condensation: zinc fume is passed into circulation and add decompression condensation bin, utilize inert nitrogen gas to carry out pressurizeing and reduced pressure treatment, condensation obtains former zinc powder;
(6) classification: in confined conditions, former zinc powder is delivered to classification workshop by zinc powder collecting conveying equipment, carry out Accurate Classification by air current classifying technique to former zinc powder, obtain the super-fine zinc dust of different size, the zinc granule produced after classification melts again to be made zinc ingot metal and adds melting furnace.
embodiment 4
Super-fine zinc dust preparation method of the present invention, comprises the following steps
(1) melt: under the condition of negative pressure of 54530Pa, crude zinc ingot is placed in melting furnace, using natural gas as fuel, is heated to 580
oc, is fused into crude zinc liquid;
(2) liquate: under the condition of negative pressure of 54530Pa, is transferred in liquation hearth by gained crude zinc liquid, carries out liquate removal of impurities, preliminary removal lead and iron tramp;
(3) except cadmium and deleading: be transferred in tower type zinc powder smelting furnace by the zinc liquid after preliminary removal of impurities, cadmium and plumbous impurity is removed successively;
(4) distill: under the condition of negative pressure of 54530Pa, the zinc liquid removing cadmium and plumbous impurity is transferred in vacuum drying oven, is heated to 600
oc, obtains zinc fume;
(5) condensation: zinc fume is passed into circulation and add decompression condensation bin, utilize inert nitrogen gas to carry out pressurizeing and reduced pressure treatment, condensation obtains former zinc powder;
(6) classification: in confined conditions, former zinc powder is delivered to classification workshop by zinc powder collecting conveying equipment, carry out Accurate Classification by air current classifying technique to former zinc powder, obtain the super-fine zinc dust of different size, the zinc granule produced after classification melts again to be made zinc ingot metal and adds melting furnace.
Claims (5)
1. a preparation method for super-fine zinc dust, comprises the steps:
(1) melt: crude zinc ingot is placed in melting furnace, is heated to 460-580
oc, is fused into crude zinc liquid;
(2) liquate: gained crude zinc liquid is transferred in liquation hearth, carries out liquate removal of impurities, preliminary removal lead and iron tramp;
(3) except cadmium and deleading: be transferred in tower type zinc powder smelting furnace by the zinc liquid after preliminary removal of impurities, cadmium and plumbous impurity is removed successively;
(4) distill: the zinc liquid removing cadmium and plumbous impurity is transferred in vacuum drying oven, is heated to 600-800
oc, obtains zinc fume;
(5) condensation: zinc fume is passed into condensation bin, under inert gas shielding, condensation obtains former zinc powder;
(6) classification: under the condition of airtight condition and inert gas shielding, the former zinc powder of gained is delivered to classification workshop, carry out Accurate Classification by air current classifying technique to former zinc powder, obtain the super-fine zinc dust of different size, the zinc granule produced after classification melts again to be made zinc ingot metal and adds melting furnace;
Above-mentioned preparation process is carried out all in confined conditions, and wherein, step (1), (2) and (4) are all carry out under the subnormal ambient of 41230-54530Pa in vacuum.
2. preparation method according to claim 1, is characterized in that, described fusion process, using natural gas as fuel.
3. preparation method according to claim 1, is characterized in that, described inert gas is nitrogen.
4. the preparation method according to any one of claims 1 to 3, is characterized in that, described condensation process, zinc fume is passed into circulation and adds decompression condensation bin, utilizes inert nitrogen gas to carry out pressurizeing and reduced pressure treatment.
5. the preparation method according to any one of claims 1 to 3, is characterized in that, described classification process, and former zinc powder is delivered to classification workshop by zinc powder collecting conveying equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410383995.4A CN105328201A (en) | 2014-08-07 | 2014-08-07 | Superfine zinc powder preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410383995.4A CN105328201A (en) | 2014-08-07 | 2014-08-07 | Superfine zinc powder preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105328201A true CN105328201A (en) | 2016-02-17 |
Family
ID=55279077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410383995.4A Pending CN105328201A (en) | 2014-08-07 | 2014-08-07 | Superfine zinc powder preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105328201A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109530709A (en) * | 2018-12-06 | 2019-03-29 | 江苏申隆锌业有限公司 | A kind of preparation method of zinc powder |
| CN112846207A (en) * | 2021-01-15 | 2021-05-28 | 昆明冶金研究院有限公司 | Preparation method of superfine active zinc powder |
-
2014
- 2014-08-07 CN CN201410383995.4A patent/CN105328201A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109530709A (en) * | 2018-12-06 | 2019-03-29 | 江苏申隆锌业有限公司 | A kind of preparation method of zinc powder |
| CN112846207A (en) * | 2021-01-15 | 2021-05-28 | 昆明冶金研究院有限公司 | Preparation method of superfine active zinc powder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160217 |