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Lead-antimony rare-earth positive grid alloy and preparation method thereof

A positive plate and alloy technology, applied in the field of metallurgy, can solve problems such as environmental pollution, capacity loss, deep discharge cycle life, etc., achieve long service life, excellent charge and discharge performance, and improve the effect of charge and discharge acceptance

Active Publication Date: 2012-01-25
TIANNENG BATTERY GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to address the deficiencies in the prior art and provide a novel lead-antimony alloy to effectively overcome the problems of early capacity loss and deep discharge cycle life caused by the lead-calcium alloy, while its maintenance-free performance is close to that of the lead-calcium alloy. And it has excellent properties in all aspects of lead-antimony-cadmium alloy, and can avoid major environmental pollution problems caused by the severe toxicity of cadmium

Method used

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  • Lead-antimony rare-earth positive grid alloy and preparation method thereof
  • Lead-antimony rare-earth positive grid alloy and preparation method thereof
  • Lead-antimony rare-earth positive grid alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Put 4.65Kg of pure lead into a lead-melting furnace (450°C-550°C) to melt, raise the temperature to 750-800°C, then add 0.35Kg of pure Sm, remove slag, stir, and keep warm at 650°C-700°C for 20 minutes Form Pb-7%Sm alloy;

[0043] Put 4.65Kg of pure lead into a lead-melting furnace (450°C-550°C) to melt it, raise the temperature to 770-820°C, add 0.35Kg of pure La, remove slag, stir, and keep it at 650°C-700°C for 20 minutes to form Pb-7%La alloy;

[0044] Put 98.99Kg of pure lead into a lead melting furnace (450°C-550°C) to melt, heat up to 500-600°C, add 1.01Kg of pure antimony with a purity of at least 99.95% and stir to form a Pb-1.009%Sb melt;

[0045] Take 72.14g of Pb-7%La master alloy and 927.86g of Pb-7%Sm master alloy and add them to the lead-antimony molten liquid in the above-mentioned lead melting furnace. After 30 minutes, a Pb-1%Sb-0.005%La-0.064%Sm alloy solution was obtained. Sampling and resampling, conforming to the casting mold after being release...

Embodiment 2

[0047] Put 4.65Kg of pure lead into a lead-melting furnace (450°C-550°C) to melt, heat up to 750-800°C, add 0.35Kg of pure Sm, remove slag, stir, and keep warm at 650°C-700°C for 20 minutes to form Pb-7%Sm alloy;

[0048] Put 4.65Kg of pure lead into a lead-melting furnace (450°C-550°C) to melt, heat up to 770-820°C, add 0.35Kg of pure La, remove slag, stir, and keep warm at 650°C-700°C for 20 minutes to form Pb-7%La alloy;

[0049] Put 99.961Kg of pure lead into a lead melting furnace (450°C-550°C) to melt, raise the temperature to 500-600°C, add 1.01Kg of pure antimony with a purity of at least 99.95% and stir to form a Pb-1.0%Sb melt;

[0050] Take 14.43g of Pb-7%La master alloy and 14.43g of Pb-7%Sm master alloy and add them to the lead-antimony molten liquid in the above-mentioned lead melting furnace. After 30 minutes, a Pb-1%Sb-0.001%La-0.001%Sm alloy solution was obtained. Sampling and resampling, conforming to the casting mold after being released from the furnace....

Embodiment 3

[0052] Put 9.3Kg of pure lead into a lead-melting furnace (450°C-550°C) to melt, heat up to 750-800°C, add 0.7Kg of pure Sm, remove slag, stir, and keep warm at 650°C-700°C for 20 minutes to form Pb-7%Sm alloy;

[0053] Put 9.3Kg of pure lead into a lead-melting furnace (450°C-550°C) to melt, raise the temperature to 770-820°C, add 0.7Kg of pure La, remove slag, stir, and keep warm at 650°C-700°C for 20 minutes to form Pb-7%La alloy;

[0054] Put 85.56Kg of pure lead into a lead melting furnace (450℃~550℃) to melt, heat up to 500~600℃, add 1.01Kg of pure antimony with a purity of at least 99.95% and stir to form Pb-1. 17%Sb melting liquid;

[0055] Take 7214.29g of Pb-7%La master alloy and 7214.29g of Pb-7%Sm master alloy, and add them to the lead-antimony melt in the above-mentioned lead melting furnace, after removing slag and stirring, the Insulated for 30 minutes to obtain a Pb-1%Sb-0.5%La-0.5%Sm alloy solution. Sampling and resampling, conforming to the casting mold a...

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Abstract

The invention belongs to the field of metallurgy, and relates to a lead-antimony rare-earth positive grid alloy and a preparation method thereof. The alloy comprises the following metal elements in percentage by mass: 0.5 to 1 percent of antimony, 0.005 to 0.1 percent of lanthanum, 0.005 to 0.1 percent of samarium, and the balance of lead. The preparation method comprises the following steps: preparing lead-lanthanum and lead-samarium alloy as master alloys; adding pure antimony into molten lead, stirring until the pure antimony is completely molten; and adding the lead-lanthanum and lead-samarium master alloys to perform mixed melting to prepare the lead-antimony rare-earth positive grid alloy. Grains of the prepared alloy become fine, uniform and regular, so that the comprehensive mechanical performance of the alloy can be improved, the impedance of an oxide film can be reduced, and the charge and discharge acceptance and deep cycle performance of a storage battery can be improved. Meanwhile, rare-earth element serves as an additive to prepare the lead-antimony grid alloy, arsenic, cadmium and other elements harming the environment and workers on the forefront of production severely are not contained. Therefore, lead alloy pollution can be reduced furthest.

Description

technical field [0001] The invention belongs to the field of metallurgy, and relates to a lead-antimony rare earth cathode grid alloy and a preparation method thereof. Background technique [0002] The grid, the inactive element, supports, collects current, and conducts electricity in lead-acid batteries. The current research directions of positive grid materials for lead-acid batteries are mainly lead-calcium alloys and low-antimony alloys. [0003] Traditional lead-calcium grid alloys have short cycle life and poor battery stability due to problems such as corrosion, electrolyte drying, thermal runaway, and insufficient charging. [0004] Lead-antimony-cadmium alloy as a positive grid alloy can effectively overcome the problems of early capacity loss and deep discharge cycle life caused by lead-calcium alloys, and its maintenance-free performance is close to that of lead-calcium alloys. However, the regeneration and smelting of waste lead-acid batteries can easily lead t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/68C22C1/03C22C11/08
CPCY02E60/12Y02E60/10
Inventor 李爱菊张天任赵海敏张文清王永胜娄可柏方明学高根芳朱健陈红雨
Owner TIANNENG BATTERY GROUP
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