CN1624959A - Mercury-free cadmium-free zinc powder for alkaline zinc-manganese dioxide cell and production method thereof - Google Patents
Mercury-free cadmium-free zinc powder for alkaline zinc-manganese dioxide cell and production method thereof Download PDFInfo
- Publication number
- CN1624959A CN1624959A CNA2003101124357A CN200310112435A CN1624959A CN 1624959 A CN1624959 A CN 1624959A CN A2003101124357 A CNA2003101124357 A CN A2003101124357A CN 200310112435 A CN200310112435 A CN 200310112435A CN 1624959 A CN1624959 A CN 1624959A
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- CN
- China
- Prior art keywords
- free
- zinc
- mercury
- cadmium
- zinc powder
- Prior art date
- 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 64
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- SZKTYYIADWRVSA-UHFFFAOYSA-N zinc manganese(2+) oxygen(2-) Chemical compound [O--].[O--].[Mn++].[Zn++] SZKTYYIADWRVSA-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 18
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 14
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 14
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 14
- 239000011701 zinc Substances 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 10
- 229910052738 indium Inorganic materials 0.000 claims abstract description 9
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims abstract description 9
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 4
- 239000010439 graphite Substances 0.000 claims abstract description 4
- 239000011819 refractory material Substances 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 7
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 4
- 238000000889 atomisation Methods 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Battery Electrode And Active Subsutance (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention relates to mercury-free and cadmium-free zinc powder for an alkaline zinc-manganese dioxide battery and a process method thereof. The invention relates to mercury-free and cadmium-free zinc powder for an alkaline zinc-manganese dioxide battery, which is characterized in that: the zinc powder comprises the components of indium and bismuth = 1-3: 1; the bismuth content is 0.005-0.1%; the content of mercury impurities is less than 1ppm, and the content of cadmium is less than 3ppm. The invention relates to a method for producing mercury-free and cadmium-free zinc powder for an alkaline zinc-manganese battery, wherein equipment materials in contact with a zinc liquid surface adopt refractory materials or graphite; the material in contact with the zinc powder is stainless steel or plastic, so that impurities are prevented from being brought into the zinc powder. The invention has the characteristics of simple process and stable physical and chemical indexes of the product, and the alkaline zinc-manganese battery prepared by the zinc powder can meet the requirements of various electrical performance technical indexes, has stable performance and really meets the requirements of a mercury-free and cadmium-free green environment-friendly battery.
Description
Technical Field
The invention relates to mercury-free and cadmium-free zinc powder for producing an alkaline zinc-manganese battery and a process method thereof.
Background
The alkaline zinc-manganese dioxide battery has excellent cost performance ratio, is loved by consumers and gradually takes the leading position in the battery for people. The zinc powder is used as the negative electrode material of the alkaline zinc-manganese battery, and the demand is increasing.
With the increasing awareness of environmental protection, the pollution of batteries to the environment is receiving more attention. Nine ministers such as national economic and trade Commission have issued 1997 and listed schedules for mercury-free cell production, requiring that cells with mercury contents higher than 0.0001% be banned from 2005. The mercury-free performance of the battery is very urgent.
Cadmium is also an element that is harmful to the environment. In the battery, cadmium is a third metal element which pollutes the human environment and threatens the human health after mercury and lead. No clear law and regulation in China requires cadmium-free alkaline manganese-zinc batteries, but the technical resources are fully utilized to realize cadmium-free zinc powder of the batteries, and the cadmium content is lower than 2ppm.
The mercury-free zinc powder is a key material for realizing the mercury-free performance of the alkaline battery, but the market and the technology of the mercury-free zinc powder are controlled by foreign countries, and the development of the battery industry in China is seriously restricted. The state puts the research on the mercury-free alkaline zinc-manganese material into the '863 plan' of China, and the mercury-free zinc powder becomes one of the key research projects in China.
The invention aims to provide a production method of zinc powder for a mercury-free and cadmium-free alkaline zinc-manganese dioxide battery, which can ensure that the mercury content is less than 1ppm and the cadmium content is less than 3ppm.
Disclosure of Invention
In order to achieve the purpose, the invention adopts the following technical scheme: the invention relates to mercury-free and cadmium-free zinc powder for an alkaline zinc-manganese battery, which comprises the following components of indium to bismuth = 1-3: 1; the bismuth content is 0.005-0.1%; the content of impurity mercury is less than 1ppm, and the content of cadmium is less than 3ppm.
The invention relates to a method for producing mercury-free and cadmium-free zinc powder for an alkaline zinc-manganese dioxide battery, which is characterized by comprising the following steps: the equipment material contacting with the zinc liquid surface adopts refractory material or graphite; the material contacting with the zinc powder is stainless steel or plastic, so that impurities are prevented from being brought into the zinc powder.
The invention leads the alloyed zinc liquid into the intermediate furnace, and then into the leaky ladle through flow control, and the production process always ensures that the intermediate furnace has the zinc alloy liquid and the liquid level of the zinc liquid in the leaky ladle is stable. The zinc liquid with stable flow is atomized into powder under the wind pressure of 0.05-0.1 Mpa. The atomized powder is continuously produced.
Compared with the prior art, the invention has the advantages of simple process and stable physical and chemical indexes of the product, and the alkaline zinc-manganese dioxide battery prepared by the zinc powder can meet the requirements of various electrical performance technical indexes and has stable performance.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The novel gas-spray method process flow for producing the mercury-free and cadmium-free zinc powder is shown in figure 1. The invention discloses a mercury-free cadmium-free zinc powder for an alkaline zinc-manganese battery, which is characterized in that a high-purity special zinc ingot and a prefabricated intermediate alloy with added elements are melted in a medium-frequency induction furnace and heated to a preset temperature, an atomizer is introduced to atomize gas to prepare powder after melt components are uniform, and the mercury-free cadmium-free zinc powder is obtained through procedures such as screening and the like. The zinc powder comprises the components of indium and bismuth = 1-3: 1; the bismuth content is 0.005-0.1%; the content of mercury impurities is less than 1ppm, and the content of cadmium is less than 3ppm.
Example 1:
the zinc powder comprises the components of indium and bismuth = 1: 1; the bismuth content is 0.005%; the content of impurity mercury is less than 1ppm, and the content of cadmium is less than 3ppm.
Example 2:
the zinc powder comprises the components of indium and bismuth = 3: 1; the bismuth content is 0.1%; the content of impurity mercury is less than 1ppm, and the content of cadmium is less than 3ppm.
Example 3:
the zinc powder comprises the components of indium and bismuth = 2: 1; the bismuth content is 0.05%; the content of mercury impurities is less than 1ppm, and the content of cadmium is less than 3ppm.
Example 4:
the zinc powder comprises the components of indium and bismuth = 1: 1; the bismuth content is 0.1%; the content of impurity mercury is less than 1ppm, and the content of cadmium is less than 3ppm.
Example 5:
the zinc powder comprises the components of indium and bismuth = 1.5: 1; the bismuth content is 0.05%; the impurity mercury content is less than 1ppm, and the cadmium content is less than 3ppm
In the above embodiment, the equipment material contacting with the zinc liquid surface is made of refractory material or graphite; the material contacting with the zinc powder is stainless steel or plastic, so that impurities are prevented from being brought into the zinc powder.
The invention leads the alloyed zinc liquid into the intermediate furnace, and then into the leaky ladle through flow control, and the production process always ensures that the intermediate furnace has the zinc alloy liquid and the liquid level of the zinc liquid in the leaky ladle is stable. The zinc liquid with stable flow is atomized into powder under the wind pressure of 0.05-0.1 Mpa. The atomization and pulverization are carried out uninterruptedly.
The invention has the advantages that the mercury content is less than 1ppm, the cadmium content is less than 3ppm, and the invention has strong originality.
The invention mainly develops the following researches:
(1) The mercury is replaced by the reasonable combination of metal elements meeting the environmental protection requirement;
(2) A certain production process is researched to ensure that the produced product meets the performance requirement of the battery and has stable quality.
a. An alloying system, which ensures that the added elements and zinc form uniform zinc alloy and segregation phenomenon does not occur in the zinc powder;
b. a powder manufacturing device, which is the key for determining the morphology of the zinc powder;
c. the powder preparation process is reasonable and guarantees the morphology, the particle size distribution and the direct yield of the product of the zinc powder;
d. continuous production equipment determines the stability of the physical and chemical indexes of the zinc powder and the production capacity.
The chemical compositions of mercury-free zinc powder are researched more and most of the mercury-free zinc powder enters the known field, but the production process is in a confidential state and is a key technology for determining the performance of products. The company independently develops a unique mercury-free cadmium-free zinc powder production process, independently designs and manufactures mercury-free cadmium-free zinc powder production key equipment, adopts high-quality zinc ingots, truly realizes the localization and industrialization of the mercury-free cadmium-free zinc powder, promotes the development of the Chinese battery industry, and has good social benefit and economic benefit.
Claims (5)
1. A mercury-free and cadmium-free zinc powder for an alkaline zinc-manganese dioxide battery is characterized in that: the zinc powder comprises the components of indium and bismuth = 1-3: 1; the bismuth content is 0.005-0.1%; the content of impurity mercury is less than 1ppm, and the content of cadmium is less than 3ppm.
2. A production method of mercury-free and cadmium-free zinc powder for an alkaline zinc-manganese battery is characterized by comprising the following steps: the equipment material contacting with the zinc liquid surface adopts refractory material or graphite; the material contacting with the zinc powder is stainless steel or plastic, so that impurities are prevented from being brought into the zinc powder.
3. The method of claim 2, wherein the method comprises the steps of: the alloyed zinc liquid is guided into the intermediate furnace and then guided into the leakage ladle through flow control, so that the zinc alloy liquid is always contained in the intermediate furnace in the production process, and the liquid level of the zinc liquid in the leakage ladle is stable.
4. A process for producing mercury-free and cadmium-free zinc powder for alkaline zinc-manganese dioxide cells as claimed in claim 2 or claim 3, wherein: the zinc liquid with stable flow is atomized into powder under the wind pressure of 0.05-0.1 Mpa.
5. The method of producing mercury-free and cadmium-free zinc powder for alkaline zinc-manganese dioxide cell as claimed in claim 4, wherein: the atomization and pulverization are carried out uninterruptedly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101124357A CN1315210C (en) | 2003-12-01 | 2003-12-01 | Mercury-free cadmium-free zinc powder for alkaline zinc-manganese dioxide cell and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101124357A CN1315210C (en) | 2003-12-01 | 2003-12-01 | Mercury-free cadmium-free zinc powder for alkaline zinc-manganese dioxide cell and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1624959A true CN1624959A (en) | 2005-06-08 |
| CN1315210C CN1315210C (en) | 2007-05-09 |
Family
ID=34759753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101124357A Expired - Lifetime CN1315210C (en) | 2003-12-01 | 2003-12-01 | Mercury-free cadmium-free zinc powder for alkaline zinc-manganese dioxide cell and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1315210C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071786A (en) * | 2012-12-28 | 2013-05-01 | 深圳市中金岭南科技有限公司 | Zinc powder for alkaline zinc-manganese battery and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3265673B2 (en) * | 1993-01-29 | 2002-03-11 | 松下電器産業株式会社 | Manganese dry cell |
| CN1121729C (en) * | 2000-10-31 | 2003-09-17 | 周炳利 | High specific energy mercury-free alloy zinc powder for alkaline battery, preparation method and device thereof |
-
2003
- 2003-12-01 CN CNB2003101124357A patent/CN1315210C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071786A (en) * | 2012-12-28 | 2013-05-01 | 深圳市中金岭南科技有限公司 | Zinc powder for alkaline zinc-manganese battery and preparation method thereof |
| CN103071786B (en) * | 2012-12-28 | 2016-01-20 | 深圳市中金岭南科技有限公司 | Zinc powder for alkaline zinc-manganese battery and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1315210C (en) | 2007-05-09 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070509 |