Manufacturing method for rare earth alloy battery zinc powder

A technology of rare earth alloy and manufacturing method, which is applied in the field of manufacturing refractory metal alloy zinc powder, can solve the problems of excessive iron impurities and inaccurate addition of rare earth metals, etc., and achieve the effect of improving recovery rate and avoiding oxidation

Inactive Publication Date: 2010-03-10
SHENZHEN NONFEMET TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of inaccurate addition of rare earth metals and excessive iron impurities, and provide a manufacturing method for ensuring that rare earth metals are accurately added into zinc powder, a manufacturing method of zinc powder for rare earth alloy batteries, comprising the following steps:

Method used

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  • Manufacturing method for rare earth alloy battery zinc powder

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Embodiment 1

[0021] Use a die-casting device made of high-purity graphite material with small holes on the wall (also known as "press melter", with 8 small holes per square centimeter), put 5g of tiny debris-like rare earth metal lanthanum, Yttrium and cerium are put into the pressure melter, wherein the mass ratio of lanthanum:yttrium:cerium is 1:1:1. In the molten state, the above rare earth metal is pressed into the zinc liquid to directly produce a zinc-rare earth master alloy, and the mass concentration of the rare earth metal is 8%; the prepared zinc-rare earth master alloy is melted in the zinc liquid to produce the required rare earth metal Concentration of zinc-rare earth alloy zinc solution, the total concentration of rare earth metals is 0.1%.

[0022] Compared with the prior art, the present invention adopts an alloy manufacturing method in which the rare earth metal is directly pressed into the zinc liquid in the first step of manufacture, and the rare earth metal is completel...

Embodiment 2

[0024] Use a die-casting device made of high-purity graphite material with small holes on the wall (also known as "press melter", with 6 small holes per square centimeter), put 8g of tiny debris-like rare earth metal lanthanum, Yttrium and cerium are put into the pressure melter, wherein the mass ratio of lanthanum:yttrium:cerium is 1:1:1. In the molten state, the above-mentioned rare earth metal is pressed into the zinc liquid to directly produce a zinc-rare earth master alloy, and the mass concentration of the rare earth metal is 12%; the prepared zinc-rare earth master alloy is melted in the zinc liquid to produce the required rare earth metal Concentration of zinc-rare earth alloy zinc solution, the total concentration of rare earth metals is 0.2%.

[0025] Compared with the prior art, the present invention adopts an alloy manufacturing method in which the rare earth metal is directly pressed into the zinc liquid in the first step of manufacture, and the rare earth metal i...

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Abstract

The invention discloses a manufacturing method for rare earth alloy battery zinc powder, which comprises the following steps: (1) using a die-casting device which is provided with small holes on the wall to press rare earth metals such as lanthanum, yttrium and cerium into zinc solution to directly produce zinc-rare earth preliminary alloy; and (2) melting the prepared zinc-rare earth preliminaryalloy in the zinc solution and manufacturing the prepared zinc-rare earth preliminary alloy into zinc-rare earth alloy zinc solution with needed rare earth metal concentration. Compared with the prior art, an alloy manufacturing method which directly presses the rare earth metal into the zinc solution is adopted in the first manufacturing step and the rare earth metal is completely soaked in thezinc solution, thus preventing rare earth metal from contacting air and being oxidized to a large degree.

Description

【Technical field】 [0001] The invention relates to the manufacture of negative pole zinc powder for alkaline zinc-manganese batteries, in particular to the manufacture of refractory metal alloy zinc powder such as rare earth. 【Background technique】 [0002] Generally, mercury-free zinc powder for alkaline zinc-manganese batteries uses indium, bismuth, calcium, aluminum, magnesium and other corrosion inhibitor additives, but when necessary, rare earth metals such as lanthanum, yttrium, and cerium should be added, and the content of rare earth metals should be controlled at 0.003-0.1 % an exact value in the range. However, rare earth metals are refractory to zinc and easily oxidized in the air, so it is difficult to ensure that rare earth metals are accurately added to zinc powder. [0003] Secondly, when adding rare earth metals such as lanthanum, yttrium, and cerium directly into the zinc powder manufacturing process, the iron impurities in the zinc powder exceed the standar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/08H01M4/26H01M4/42
CPCY02E60/12Y02E60/10
Inventor 陈端云李清湘郑顺德吴涛范志俊乔涛董烈寒
Owner SHENZHEN NONFEMET TECH
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