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Preparation method of lead storage battery grid alloy

A lead-acid battery and grid technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low utilization rate of rare earth metals, high energy consumption of rare earth alloys, high impurity content, etc., and achieve high raw material utilization rate and low impurity content The effect of less and high process controllability

Active Publication Date: 2018-08-31
TIANNENG BATTERY GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the deficiencies in the prior art, the present invention provides a method for preparing a lead storage battery grid alloy, which overcomes the high energy consumption, large burning loss, high impurity content and relatively low utilization rate of rare earth metals in the prior art for preparing rare earth alloys. low level problem

Method used

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  • Preparation method of lead storage battery grid alloy
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  • Preparation method of lead storage battery grid alloy

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Experimental program
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Effect test

Embodiment 1

[0038] Aluminum-lanthanum-cerium rare earth master alloy was prepared by molten salt electrolysis.

[0039] The mass ratio of each component in the electrolyte system is LaF 3 : CeF 3 :LiF:BaF 2 =40:40:10:10; the mass ratio of the added raw materials is La 2 o 3 : CeO 2 :Al 2 o 3 =25:25:50. The current intensity of molten salt electrolysis is 2800A, and the anode current density is 1.0~1.2A / cm 2 , the cathode current density is 15~18A / cm 2, the electrolysis temperature is 880-910°C; the quality of the electrolyte in the electrolytic furnace is 100kg, and 5kg of raw materials are put into the electrolytic furnace to obtain 2.6kg of alloy. The ratio is 95.1%, and the composition of the aluminum-lanthanum-cerium rare earth master alloy is shown in Table 1, wherein Fe, Si, C, Cu, Ag, Sb, etc. are impurities, the same below.

[0040] Table 1 Analysis results of aluminum-lanthanum-cerium rare earth master alloy composition / %

[0041] La

Embodiment 2

[0043] Aluminum-lanthanum-cerium rare earth master alloy was prepared by molten salt electrolysis.

[0044] The mass ratio of each component in the electrolyte system is LaF 3 : CeF 3 :LiF:BaF 2 =30:30:20:20; the mass ratio of the added raw materials is La 2 o 3 : CeO 2 : Al 2 o 3 =40:30:30. The current intensity of molten salt electrolysis is 2700A, and the anode current density is 1.2~1.4A / cm 2 , the cathode current density is 18~20A / cm 2 , the electrolysis temperature is 920-950°C; the quality of the electrolyte in the electrolytic furnace is 250kg, and 5kg of raw materials are put into it to obtain an alloy of 3.2kg. 93.6%, the composition of the prepared aluminum-lanthanum-cerium rare earth master alloy is shown in Table 2.

[0045] Table 2 Analysis results of aluminum-lanthanum-cerium rare earth master alloy composition / %

[0046] La

Embodiment 3

[0048] Aluminum-lanthanum-cerium rare earth master alloy was prepared by molten salt electrolysis.

[0049] The mass ratio of each component in the electrolyte system is LaF 3 : CeF 3 :LiF:BaF 2 =40:40:10:10; the mass ratio of added raw materials is La 2 o 3 : CeO 2 : Al 2 o 3 =15:15:70. The current intensity of molten salt electrolysis is 2600A, and the anode current density is 1.3~1.5A / cm 2 , the cathode current density is 17~20A / cm 2 , the electrolysis temperature is 850-880°C; the quality of the electrolyte in the electrolytic furnace is 50kg, and 5kg of raw materials are put into it to obtain an alloy of 2.1kg. The content of lanthanum in the alloy is 28.4%, and the content of cerium is 27.3%. 92.5%, the composition of the prepared aluminum-lanthanum-cerium rare earth master alloy is shown in Table 3.

[0050] Table 3 Al-lanthanum-cerium rare earth master alloy composition analysis results / %

[0051] La

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Abstract

The invention discloses a preparation method of lead storage battery grid alloy. The preparation method comprises the following steps that 1, aluminum-lanthanum-cerium rare earth master alloy is prepared through a molten salt electrolysis method; 2, the aluminum-lanthanum-cerium rare earth master alloy, sodium and part of lead are fused and evenly stirred to prepare intermediate alloy; 3, the intermediate alloy, calcium, tin and residual lead are fused and uniformly stirred to prepare the lead storage battery grid alloy. The rare earth master alloy is prepared through the molten salt electrolysis method, compared with the mode that rare earth element elementary substances are prepared from oxide first and then the simple substances are directly used for preparing alloy, the rare earth master alloy prepared through the preparation method is stable in component and less in impurity content, and the utilization rate of raw materials is higher; the rare earth oxide is directly used as theraw material, the raw materials are more easily available, and the utilization rate of rare earth metal reaches 90% or above; then the intermediate alloy is prepared to produce work alloy; the components are more uniform; the process controllability is high.

Description

technical field [0001] The invention relates to the technical field of lead storage battery production, in particular to a preparation method of a lead storage battery grid alloy. Background technique [0002] Lead storage battery is a reversible DC power supply, which can convert chemical energy into electrical energy, and also convert electrical energy into chemical energy. Lead storage battery is mainly composed of electrolyte, battery tank and pole group. The electrolyte of lead storage battery is sulfuric acid solution. The pole group is mainly composed of positive plate, negative plate and separator. The separator is mainly used to store electrolyte and serve as oxygen The composite gas channel plays a role in preventing active material falling off and short circuit between positive and negative electrodes. [0003] In the process of battery production and processing, the grid is used as the carrier and conductor of the lead paste. The lead paste can only become a pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C11/06C22C1/03C25C3/36
CPCC22C1/03C22C11/06C25C3/36C25C7/005H01M4/685H01M4/73Y02E60/10
Inventor 代飞刘青高根芳姚秋实汤序锋胡曙周文渭熊正林
Owner TIANNENG BATTERY GROUP
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