CN1233860A - Method for producing zinc powder used for prodn. of low mercury or mercury-free alkaline cell - Google Patents
Method for producing zinc powder used for prodn. of low mercury or mercury-free alkaline cell Download PDFInfo
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- CN1233860A CN1233860A CN 99112780 CN99112780A CN1233860A CN 1233860 A CN1233860 A CN 1233860A CN 99112780 CN99112780 CN 99112780 CN 99112780 A CN99112780 A CN 99112780A CN 1233860 A CN1233860 A CN 1233860A
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- zinc powder
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- alkaline cell
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Abstract
This invention relates to the prodn. of battery zinc powder. The characteristic are: the selected additive agent is one or two of In, Pb, and one or two selected from Bi, Ca, Al, Mg, Ga, Li, Cd which are then atomized with zinc powder to produce zinc alloy, zinc smelting temp. is in 450-800 deg.C, amalgamating temp. is in 130-250 deg.C, vacuum degree is selected from -0.05 to -0.2 MPa. The advantages is that battery zinc powder can reach technology standard of low mercury or mercuryless ( 0.15%) so to reduce the harm produced by mercury to alkaline battery manufacturer, meanwhile the alkaline battery made by the battery zinc powder can reach all kinds of electric performance standard too.
Description
The present invention relates to a kind of process that is used to produce battery zinc powder.
The amalgamation zinc powder is the negative material of high-energy alkaline cell, high-energy alkaline cell have specific energy height, performance good, can repeatedly discharge and recharge, the life-span of use will replace common batteries than the high 6-10 of common batteries advantage such as doubly.
Along with the development of technology, environmental protection more and more becomes the problem that countries in the world are attached great importance to, and especially responsive more to the mercury evil, flourishing country (as Japan) sets about developing low mercury cell and mercury-free battery (green battery) already.The indication of China Ministry of Light Industry: the battery mercury content must drop to below the 250ppm in the future, could export Southeast Asia and American-European countries, and just the mercury content of alkaline cell zinc dust must be below 0.15%.The low mercury cell of now domestic each battery producer development must be from external import battery zinc powder, and they wish that urgently we develop low mercury and non-mercury cell zinc powder early.
The present alkaline cell zinc dust mercury content height of producing is along with the increase of battery consumption contaminated environment seriously.
The height of mercury content directly influences gassing rate in the alkaline cell zinc dust, generally the gassing rate of zinc powder increases along with the reduction of mercury content, the alkaline cell zinc dust gassing rate will make the battery " gas rises " manufactured greatly, climb alkali, even the phenomenon of blasting, so, merely reduce the mercury content of battery zinc powder, the performance of battery just is difficult to reach requirement.
For making battery zinc powder reach the result of low mercury and no mercury, to preserve the ecological environment, the while can guarantee every requirement on electric performance of battery again, this is the present invention's purpose that will reach just.
The present invention is achieved through the following technical solutions:
A kind of production method of producing alkaline cell zinc dust, select the additive of following production alkaline cell zinc dust for use:
One or both of 0.005-2.0%In, 0.003-2.0%Pb and 0.001-2.0%Bi, 0.003-2.0%Ca, 0.003-2.0%Al, 0.005-1.0%Mg, 0.005-2%Ga, 0.003-2%Li, 0.005-1%Cd one or both and zinc powder component alloy wherein is after be atomized into the zinc powder alloy.
In the formation technical process of zinc powder, molten zinc temperature is at 450-700 ℃; With the zinc liquid nozzle of flowing through, the formation zinc powder atomizes under the high pressure wind action; In the amalgamating process of zinc powder, temperature is chosen as 130-250 ℃, vacuum degree selection-0.05～-0.2MPa.
Advantage of the present invention is the technical indicator that makes battery zinc powder can reach low mercury (promptly≤0.15%) or do not have mercury, has reduced the harm that mercury brings for alkaline cell zinc dust manufacturer, and the alkaline battery of manufacturing simultaneously can reach the requirement of every electrical property technical indicator again.In order to make low mercury or mercury-free alkaline battery zinc powder reach this index, we select some and zinc can form ideal alloy, the overpotential element that improves hydrogen is as additive, be suppressed at separating out of hydrogen in the electrolyte like this, solve the problem that gassing rate increases, find out in test best atomization condition, develop smooth surface, epigranular, the zinc powder non-trimming burr, globulate.Through me company and some tests that detects departments, every index all reaches the best level of external like product.
Succeeding in developing of low mercury and mercury-free alkaline battery zinc powder, the like product that can replace external import fully, to save a large amount of foreign exchanges for country, provide reliable assurance to China alkaline battery outlet Southeast Asia and American-European countries simultaneously, for country has created back a large amount of foreign exchanges, development and progress of science and technology that this will further promote China's battery industry have very big economic benefit and social benefit.
Along with science and technology development, consumptions such as computer, camera, Communication Equipment, military space are more and more, also can be increasing as the high-energy alkaline cell consumption of the energy.According to Ministry of Light Industry's statistics, developed country such as the U.S., Japan alkaline battery consumption per capita is more than 40/year, and China per capita consumption have only 2-3 only/year (comprising common batteries), along with Chinese economic development, the raising of living standards of the people, to significantly increase the battery consumption, can predict that alkaline battery has extensive market prospects at home and abroad.
Accompanying drawing 1 is a process chart of the present invention.
The present invention is specifically described by execution mode below in conjunction with accompanying drawing:
The melting pot of qualified zinc ingot metal being put into intermediate frequency furnace melts, and adds certain quantity of additive again, and the additive of selecting for use is as follows: 1,0.007%In, 0.2%Pb and 0.007%Bi, 1.8%Ca and zinc powder component alloy, after be atomized into the zinc powder alloy; 2,1.0%In and 0.5%Al, 0.01%Mg and zinc powder component alloy are after be atomized into the zinc powder alloy; 3,0.1%Pb and 0.01%Ga, 0.1%Li and zinc powder component alloy are after be atomized into the zinc powder alloy; 4,0.1%In, 0.07%Pb and 0.1%Ga, 0.5%Cd and zinc powder component alloy are after be atomized into the zinc powder alloy; 5,0.06%In, 0.006%Pb and 0.005%Li, 0.007%Cd and zinc powder component alloy are after be atomized into the zinc powder alloy; 6,0.006%In, 0.009%Pb and 0.006Mg, 1.0%Ga and zinc powder component alloy are after be atomized into the zinc powder alloy.
Except that by above 6 kinds of additives, remaining execution mode with in the technical scheme any component in the given scope can both reach purpose of the present invention.
When fusion temperature reaches, with the zinc liquid nozzle of flowing through, under the high pressure wind action, zinc liquid penetrates from nozzle with higher speed, and form tiny drop, atomizing takes place in atomizer form zinc powder, zinc powder together with part water be sent to make in the centrifuge zinc powder and moisture from, then zinc powder is delivered to and carried out drying in the drier, dried zinc powder is through screening, and+40 order crude zinc powder return in the intermediate frequency furnace melting pot as raw material and repeat melting, and the thin zinc powder of-200 orders send the chemical plant to use as another kind of product, send individual cell producer after the amalgamation of-120-+200 order, intermediate products-40-+120 order adds certain mercury amount and carries out amalgamation.Temperature is controlled at 200 ℃ in the amalgamation reactor, vacuum degree selection-0.07MPa, carry out amalgamation under the appropriateness stirring condition, thereby make the amalgamation zinc powder, be alkaline cell zinc dust, every performance index of this zinc powder all reach requirement, and Hg% is below 0.15%, gassing rate can be controlled in below the 0.15ml/5g.3d, and the gassing rate of mercury less zinc powder is controlled at below the 0.2ml/5g.3d.
Claims (2)
1, a kind of production method of producing low mercury and mercury-free alkaline battery zinc powder is characterized in that: the additive of selecting following production alkaline cell zinc dust for use:
One or both of 0.005-2.0%In, 0.003-2.0%Pb and 0.001-2.0%Bi, 0.003-2.0%Ca, 0.003-2.0%Al, 0.005-1.0%Mg, 0.005-2%Ga, 0.003-2%Li, 0.005-1%Cd one or both and zinc powder component alloy wherein is after be atomized into the zinc powder alloy.
2, according to claim 1 the production method of the low mercury of fast production and mercury-free alkaline battery zinc powder, it is characterized in that: in the formation technical process of zinc powder, molten zinc temperature is at 450-700 ℃; With the zinc liquid nozzle of flowing through, the formation zinc powder atomizes under the high pressure wind action; In the amalgamating process of zinc powder, temperature is chosen as 130-250 ℃, vacuum degree selection-0.05～-0.2MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99112780 CN1233860A (en) | 1999-03-25 | 1999-03-25 | Method for producing zinc powder used for prodn. of low mercury or mercury-free alkaline cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99112780 CN1233860A (en) | 1999-03-25 | 1999-03-25 | Method for producing zinc powder used for prodn. of low mercury or mercury-free alkaline cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1233860A true CN1233860A (en) | 1999-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99112780 Pending CN1233860A (en) | 1999-03-25 | 1999-03-25 | Method for producing zinc powder used for prodn. of low mercury or mercury-free alkaline cell |
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| CN (1) | CN1233860A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006047917A1 (en) * | 2004-11-05 | 2006-05-11 | Chung Pak Battery Works Ltd. | Negative electrode of dry battery, manufacture method of the same, and zinc-manganese dry battery using the same |
| WO2006053465A1 (en) * | 2004-11-16 | 2006-05-26 | Chung Pak Battery Works Ltd. | Zinc particles for zinc-manganese dry battery and manufacture method of the same |
| WO2006053466A1 (en) * | 2004-11-16 | 2006-05-26 | Chung Pak Battery Works Ltd. | Zinc plate for zinc-manganese dry battery and forming method of the same |
-
1999
- 1999-03-25 CN CN 99112780 patent/CN1233860A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006047917A1 (en) * | 2004-11-05 | 2006-05-11 | Chung Pak Battery Works Ltd. | Negative electrode of dry battery, manufacture method of the same, and zinc-manganese dry battery using the same |
| WO2006053465A1 (en) * | 2004-11-16 | 2006-05-26 | Chung Pak Battery Works Ltd. | Zinc particles for zinc-manganese dry battery and manufacture method of the same |
| WO2006053466A1 (en) * | 2004-11-16 | 2006-05-26 | Chung Pak Battery Works Ltd. | Zinc plate for zinc-manganese dry battery and forming method of the same |
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